Data transmission indicator method, terminal-type network device, and computer-readable immutable storage media.

Abstract

The invention relates to a method of indicating data transmission, access point and terminal equipment, which includes: sending, by the access point, a physical layer signaling of orthogonal frequency division multiple access (OFDMA) to a terminal equipment, wherein the OFDMA physical layer signaling indicates, to the terminal equipment, the first subchannel allocated to the terminal equipment for receiving downlink OFDMA data information; sending, by the access point, in OFDMA mode, downlink OFDMA data information on the first subchannel allocated to the terminal equipment; wherein the downlink OFDMA data information carries a request, and this request indicates the terminal equipment to send an acknowledgment (ACK) or block acknowledge (BA) to the access point in OFDMA mode;And the OFDMA data information downlink, as indicated, to the terminal device, a second subchannel is allocated to the terminal device to send an ACK response or BA response to the access point.

Description

[0001] TECHNICAL FIELD The present invention relates to the field of communication technologies, and in particular, to a method for indicating data transmission, an access point, and a terminal. Background technique

[0002] Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) is the basic transmission mode of current wireless communication, which compresses the subcarrier spacing to the minimum within the allowable range of subcarrier orthogonality, thus forming multiple Parallel and non-interfering transmission channels improve the frequency utilization efficiency of the system. Orthogonal Frequency Division Multiple Access (hereinafter referred to as OFDMA) utilizes the above-mentioned characteristics of OFDM to allocate non-interfering subcarriers in OFDM to multiple users, so as to realize multi-user access or data transmission. Using OFDMA to send data actually means that the sending end synchronously sends the data of multiple receiving ends to the receiving ends associated with each sub-channel through their corresponding sub-channels (the sub-channels here can contain one sub-carrier or multiple sub-carriers. carrier).

[0003] In the prior art, transmission in the OFDMA mode can only support a bandwidth of 20 MHz for transmission, and the 20 MHz can be divided into 64 subcarriers, wherein 48 subcarriers are used to transmit user data. The existing OFDMA technology adds a signaling part after the physical layer preamble of the data format (the format of the signaling part is only applicable to the bandwidth of 20MHZ), the signaling part is used to indicate the users allocated for each subcarrier, Wherein, one subcarrier can only correspond to one user identity (Identity, hereinafter referred to as ID). The sending end synchronously transmits data of different users on different subcarriers, and correspondingly, the user receives the data sent by the sending end on corresponding subcarriers.

[0004] However, when the number of users is greater than 48, due to the limitation of the 20MHz bandwidth, the existing technology cannot provide instructions for the remaining users exceeding 48 when receiving data from the sending end. Contents of the invention

[0005] The present invention provides an indication method for data transmission, an access point and a terminal, which are used to solve the problem in the prior art that no indication can be made for more than 48 other users when receiving data from the sending end. In a first aspect, the present invention provides a method for indicating data transmission, including:

[0006] The access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannels allocated for the terminal, so that the terminal can use the OFDMA The physical layer signaling determines the subchannel corresponding to the terminal; wherein, the OFDMA physical layer signaling includes the identifier of the terminal and subchannel information corresponding to the identifier of the terminal.

[0007] With reference to the first aspect, in a first possible implementation manner of the first aspect, the identifier of the terminal is an identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink Subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal, including:

[0008] The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, the terminal group corresponds to the subchannel.

[0009] With reference to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, before the access point sends OFDMA physical layer signaling to the terminal, it further includes:

[0010] The access point sends the mapping relationship between the identifier of the terminal group and the address of the terminal to the terminal, so that the terminal knows the terminal group it is in.

[0011] With reference to the first aspect, in a third possible implementation manner of the first aspect, the identifier of the terminal is an identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling uses To indicate to the terminal the subchannel allocated for the terminal, including:

[0012] The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, each terminal in the terminal group and The sub-channels are in one-to-one correspondence.

[0013] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the access point sends an OFDMA 0FDMA physical layer signaling, including:

[0014] The access point sends an OFDM preamble to the terminal; wherein the OFDM preamble carries the OFDMA physical layer signaling; or,

[0015] The access point sends a null data packet announcement NDPA frame to the terminal; wherein, the NDPA frame carries the OFDMA physical layer signaling.

[0016] In combination with any one of the first aspect to the third possible implementation manner of the first aspect, in the first In a fifth possible implementation manner of the aspect, the access point sends an Orthogonal Frequency Division Multiple Access message to the terminal.

[0017] 0FDMA physical layer signaling, including:

[0018] The access point sends an NDPA frame and an OFDM preamble to the terminal;

[0019] Wherein, the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling; or, the The NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

[0020] With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the terminal Indicating the subchannel allocated for the terminal to receive downlink OFDMA data, after the access point sends the OFDMA physical layer signaling to the terminal, it also includes:

[0021] The access point uses OFDMA mode to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a switching domain, ultra-high throughput Signaling UHT-SIG_B.

[0022] With reference to the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect, the OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block Acknowledging the BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; then the OFDMA physical layer signaling is also used to indicate the The subchannel corresponding to the terminal assigned by the terminal to send an ACK response or BA response to the access point; then the access point uses OFDMA mode to send the downlink OFDMA data information on the subchannel corresponding to the terminal , Also includes:

[0023] The access point receives the ACK response or BA response sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode.

[0024] With reference to the sixth possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the OFDMA physical layer signaling is used to indicate that the terminal is assigned to send an ACK response or a BA response to The subchannel corresponding to the terminal of the access point, after the access point sends the downlink OFDMA data information on the subchannel corresponding to the terminal, it further includes:

[0025] The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to adopt The OFDMA mode sends an ACK response or a BA response to the access point;

[0026] The access point receives the ACK response or BA response sent by the terminal on the corresponding subchannel in OFDMA mode.

[0027] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the OFDMA physical layer signaling is specifically used to indicate to the terminal Sending an ACK response or a BA response to the subchannel corresponding to the terminal assigned to the terminal; then the access point sends an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, including:

[0028] The access point sends MU-MIMO data information to the terminal in a multi-user multiple-input multiple-output MU-MIMO mode; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling;

[0029] Then after the access point sends the OFDMA physical layer signaling to the terminal, the method further includes:

[0030] The access point receives the ACK response or BA response sent by the terminal on the corresponding subchannel in OFDMA mode.

[0031] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the terminal Instructing the terminal to send an ACK response or a BA response to the subchannel corresponding to the terminal assigned to the access point; then the access point sends an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, including :

[0032] The access point sends MU-MIMO data information to the terminal in MU-MIMO mode; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling;

[0033] The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to transmit to the terminal The access point sends an ACK response or a BA response;

[0034] Then after the access point sends the OFDMA physical layer signaling to the terminal, the method further includes:

[0035] The access point receives the information sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode. ACK response or BA response sent.

[0036] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in an eleventh possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or a BA response to the access point; then the access point sends an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, include:

[0037] The access point sends MU-MIMO data information to the terminal in MU-MIMO mode; the access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or BA request frame Including a dedicated information bit, the dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the ACK request frame or BA request frame carries the OFDMA physical layer signaling ;

[0038] Then after the access point sends the OFDMA physical layer signaling to the terminal, the method further includes:

[0039] The access point receives the ACK response or BA response sent by the terminal on the corresponding subchannel in OFDMA mode.

[0040] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a twelfth possible implementation manner of the first aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or An OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send an ACK response or BA response to the access point; the OFDMA physical layer signaling is specifically used to send the terminal Indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or BA response to the access point; after the access point sends the orthogonal frequency division multiple access (OFDMA) physical layer signaling to the terminal, it also include:

[0041] The access point uses OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal;

[0042] The access point receives the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding subchannel.

[0043] With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a thirteenth possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or a BA response to the access point; after the access point sends the orthogonal frequency division multiple access (OFDMA) physical layer signaling to the terminal, Also includes:

[0044] The access point uses OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal;

[0045] The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send The access point sends an ACK response or a BA response;

[0046] The access point receives the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding subchannel.

[0047] With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a fourteenth possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal for sending uplink OFDMA data information to the access point; then the access point sends an Orthogonal Frequency Division Multiple Access OFDMA physical layer signaling to the terminal Previously, also included:

[0048] The access point receives the uplink transmission frame sent by the terminal;

[0049] Then after the access point sends the OFDMA physical layer signaling to the terminal, it also includes:

[0050] The access point receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0051] With reference to the fourteenth possible implementation manner of the first aspect, in the fifteenth possible implementation manner of the first aspect, the uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request Or the OFDMA BA request is also used to instruct the access point to send an ACK response or BA response to the terminal in OFDMA mode; then the access point receives the uplink OFDMA data sent by the terminal on the corresponding subchannel After the information, also include:

[0052] The access point sends an ACK response or a BA response corresponding to the uplink OFDMA data information on the subchannel corresponding to the terminal in OFDMA mode.

[0053] With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a sixteenth possible implementation manner of the first aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal for sending uplink OFDMA data information to the access point; then the access point sends an Orthogonal Frequency Division Multiple Access OFDMA physical layer signaling to the terminal After that, also include: The access point receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0054] In a second aspect, the present invention provides a method for indicating data transmission, including:

[0055] The terminal receives the orthogonal frequency division multiple access OFDMA physical layer signaling sent by the access point, and the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated by the access point to the terminal; wherein, the The OFDMA physical layer signaling includes the identity of the terminal and subchannel information corresponding to the identity of the terminal;

[0056] The terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling.

[0057] With reference to the second aspect, in a first possible implementation manner of the second aspect, the identifier of the terminal is an identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink Subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal, including:

[0058] The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, the terminal group corresponds to the subchannel.

[0059] With reference to the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, before the terminal receives the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point, further include:

[0060] The terminal receives the mapping relationship between the identifier of the terminal group and the address of the terminal sent by the access point;

[0061] Then the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, including:

[0062] The terminal determines that it is located in the terminal group according to the mapping relationship, and the terminal determines the subchannel corresponding to the terminal group as the subchannel corresponding to the terminal.

[0063] With reference to the second aspect, in a third possible implementation manner of the second aspect, the identifier of the terminal is an identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling uses To indicate to the terminal the subchannel allocated for the terminal, including:

[0064] The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, each terminal in the terminal group and The sub-channels are in one-to-one correspondence. With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the terminal receives the OFDM sent by the access point site

[0065] 0FDMA physical layer signaling, including:

[0066] The terminal receives the OFDM preamble sent by the access point; wherein the OFDM preamble carries the OFDMA physical layer signaling; or,

[0067] The terminal receives the empty data packet announcement NDPA frame sent by the access point; wherein, the NDPA frame carries the OFDMA physical layer signaling.

[0068] With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the terminal receives the OFDM sent by the access point Address 0FDMA physical layer signaling, also includes:

[0069] The terminal receives the NDPA frame and the OFDM preamble sent by the access point; wherein, the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the OFDMA physical layer signaling subchannel information corresponding to the identifier of the terminal; or, the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the OFDMA physical The identifier of the terminal in layer signaling.

[0070] With reference to any one of the second aspect to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the terminal Instructing the access point to allocate a subchannel for receiving downlink OFDMA data for the terminal, then after the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it further includes: receiving the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover domain, an ultra-high throughput signaling UHT -SIG_B.

[0071] With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the terminal receives the downlink OFDMA data sent by the access point on a subchannel corresponding to the terminal information, including:

[0072] The terminal receives the destination terminal address corresponding to the OFDMA data sent by the access point;

[0073] The terminal judges whether it matches the address of the destination terminal;

[0074] If yes, the terminal receives the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal. With reference to the seventh possible implementation manner of the second aspect, in the eighth possible implementation manner of the second aspect, the OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block Acknowledging the BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; then the OFDMA physical layer signaling is also used to indicate the The subchannel corresponding to the terminal assigned by the terminal to send the ACK response or BA response to the access point, then the terminal receives the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal , Also includes:

[0075] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0076] With reference to the seventh possible implementation manner of the second aspect, in a ninth possible implementation manner of the second aspect, the OFDMA physical layer signaling is used to indicate that the terminal is assigned to send an ACK response or a BA response to The sub-channel corresponding to the terminal of the access point, after the terminal receives the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal, it also includes: the terminal receiving the An ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send to the access point ACK response or BA response;

[0077] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0078] With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the OFDMA physical layer signaling is specifically used to indicate to the terminal The subchannel corresponding to the terminal allocated for the terminal to send an ACK response or BA response to the access point; then the terminal receives the orthogonal frequency division multiple access OFDMA physical layer signaling sent by the access point, including :

[0079] The terminal receives the multi-user multiple-input multiple-output MU-MIMO data information sent by the access point; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling;

[0080] After the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it further includes:

[0081] The terminal uses OFDMA mode to send to the access point on the subchannel corresponding to the terminal ACK response or BA response.

[0082] With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in an eleventh possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or BA response to the access point; then the terminal receives the orthogonal frequency division multiple access OFDMA physical layer signaling sent by the access point, including :

[0083] The terminal receives the MU-MIMO data information sent by the access point; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling;

[0084] The terminal receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to use OFDMA mode to send The access point sends an ACK response or a BA response;

[0085] After the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it further includes:

[0086] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0087] With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in a twelfth possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or BA response to the access point; then the terminal receives the orthogonal frequency division multiple access OFDMA physical layer signaling sent by the access point, including :

[0088] The terminal receives the MU-MIMO data information sent by the access point;

[0089] The terminal receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to use OFDMA mode to send The access point sends an ACK response or a BA response; the ACK request frame or the BA request frame carries the OFDMA physical layer signaling;

[0090] After the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it further includes:

[0091] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0092] Combining the second aspect to any one of the third possible implementation manners of the second aspect, in the second In the thirteenth possible implementation manner of the aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use the OFDMA mode to send the The access point sends an ACK response or a BA response; the OFDMA physical layer signaling is specifically used to indicate to the terminal that the terminal is assigned to send an ACK response or a BA response to the access point corresponding to the terminal subchannel; then after the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it also includes:

[0093] The terminal receives the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal;

[0094] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0095] With reference to any one of the second aspect to the third possible implementation manner of the second aspect, in a fourteenth possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or a BA response to the access point; then the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling , Also includes:

[0096] The terminal receives the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal;

[0097] The terminal receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to use OFDMA mode to send The access point sends an ACK response or a BA response;

[0098] The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0099] With reference to any one of the second aspect to the fifth possible implementation manner of the second aspect, in a fifteenth possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel allocated for the terminal to send uplink OFDMA data information to the access point; before the terminal receives the OFDMA physical layer signaling sent by the access point, it also includes:

[0100] The terminal sends an uplink transmission frame to the access point;

[0101] After the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it further includes: The terminal sends the uplink OFDMA data information to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0102] With reference to the fifteenth possible implementation manner of the second aspect, in the sixteenth possible implementation manner of the second aspect, the uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request Or the OFDMA BA request is also used to instruct the access point to send an ACK response or BA response to the terminal in OFDMA mode; then the terminal sends the uplink response to the access point on the subchannel corresponding to the terminal After the 0FDMA data information, it also includes:

[0103] The terminal receives the ACK response or BA response corresponding to the uplink OFDMA data information sent by the access point on the subchannel corresponding to the terminal.

[0104] With reference to any one of the second aspect to the fifth possible implementation manner of the second aspect, in a seventeenth possible implementation manner of the second aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal for sending uplink OFDMA data information to the access point; then, after the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, Also includes:

[0105] The terminal uses OFDMA mode to send the uplink OFDMA data information to the access point on the subchannel corresponding to the terminal.

[0106] In a third aspect, the present invention provides an access point, including:

[0107] A sending module, configured to send an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannels allocated for the terminal, so that the terminal according to the The OFDMA physical layer signaling determines the subchannel corresponding to the terminal; wherein the OFDMA physical layer signaling includes the identifier of the terminal and subchannel information corresponding to the identifier of the terminal.

[0108] With reference to the third aspect, in a first possible implementation manner of the third aspect, the identifier of the terminal is an identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink Subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal, including:

[0109] The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, the terminal group corresponds to the subchannel.

[0110] With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the sending module is further configured to, before sending the OFDMA physical layer signaling to the terminal, send The terminal sends the mapping relationship between the identifier of the terminal group and the address of the terminal, so that the terminal knows the terminal group it is in.

[0111] With reference to the third aspect, in a third possible implementation manner of the third aspect, the identifier of the terminal is an identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling uses To indicate to the terminal the subchannel allocated for the terminal, including:

[0112] The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, each terminal in the terminal group and The sub-channels are in one-to-one correspondence.

[0113] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the sending module is specifically configured to send the positive Cross-frequency division multiplexing OFDM preamble; wherein, the OFDM preamble carries the OFDMA physical layer signaling; or is specifically used to send an empty data packet to the terminal to announce an NDPA frame; wherein, the NDPA frame carries the OFDMA Physical layer signaling.

[0114] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the sending module is further configured to send the NDPA to the terminal A frame and an OFDM preamble; wherein, the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling or, the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

[0115] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send to the terminal Indicating the subchannel allocated for the terminal to receive downlink OFDMA data, the sending module is further configured to, after sending the OFDMA physical layer signaling to the terminal, use the OFDMA mode to transmit the subchannel corresponding to the terminal Downlink OFDMA data information is sent on the sub-channel; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a switching field and ultra-high throughput signaling UHT-SIG_B.

[0116] With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block Acknowledge BA Request, the OFDMA ACK Request or OFDMA BA Please The request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; The subchannel corresponding to the terminal of the access point; then the access point further includes:

[0117] a receiving module, configured to receive the ACK sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode after the sending module sends the downlink OFDMA data information on the subchannel corresponding to the terminal in OFDMA mode response or BA response.

[0118] With reference to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner of the third aspect, the OFDMA physical layer signaling is used to indicate that the terminal is assigned to send an ACK response or a BA response to the subchannel corresponding to the terminal of the access point; the sending module is further configured to send an ACK request frame or to the terminal after sending the downlink OFDMA data information on the subchannel corresponding to the terminal BA request frame; wherein, the ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode;

[0119] The receiving module is further configured to receive an ACK response or a BA response sent by the terminal on a corresponding subchannel in OFDMA mode.

[0120] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the OFDMA physical layer signaling is specifically used to indicate to the terminal Sending an ACK response or a BA response to the subchannel corresponding to the terminal allocated to the access point for the terminal; then the sending module is specifically configured to use a multi-user multiple-input multiple-output MU-MIMO mode to send the The terminal sends MU-MIMO data information; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling;

[0121] The receiving module is further configured to receive the ACK response or BA response sent by the terminal on the corresponding subchannel in OFDMA mode after the sending module sends the OFDMA physical layer signaling to the terminal.

[0122] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a tenth possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send the terminal Instructing the terminal to send an ACK response or a BA response to the subchannel corresponding to the terminal of the access point; then the sending module is specifically configured to send an ACK response or a BA response to the terminal in MU-MIMO mode MU-MIMO data information; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; and sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or BA request frame including a dedicated information bit, where the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode;

[0123] Then the receiving module is further configured to receive the ACK response sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode after the sending module sends the OFDMA physical layer signaling to the terminal or BA response.

[0124] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in an eleventh possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or a BA response to the access point; then the sending module is specifically used to send the MU-MIMO mode to the terminal in MU-MIMO mode. MIMO data information; and sending an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to transmit to the terminal The access point sends an ACK response or a BA response; the OFDMA physical layer signaling is carried in the ACK request frame or the BA request frame;

[0125] Then the receiving module is also used to receive the ACK response or BA response sent by the terminal on the corresponding subchannel using OFDMA mode after the sending module sends the OFDMA physical layer signaling to the terminal .

[0126] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a twelfth possible implementation manner of the third aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or An OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send an ACK response or BA response to the access point; the OFDMA physical layer signaling is specifically used to send the terminal Indicate the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or BA response to the access point; the sending module is also used to send an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signal to the terminal After ordering, using OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal;

[0127] The receiving module is further configured to receive an ACK response or a BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0128] With reference to any one of the third aspect to the third possible implementation manner of the third aspect, in a thirteenth possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal to send an ACK response or a BA response to the access point; then the sending module is also used to send an Orthogonal Frequency Division Multiple Access (OFDMA) physical After layer signaling, use OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal; and send an ACK request frame or BA request frame to the terminal; wherein, The ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; then the receiving module is also used to receiving the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0129] With reference to any one of the third aspect to the fifth possible implementation manner of the third aspect, in a fourteenth possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point;

[0130] Then the receiving module is further configured to receive the uplink transmission frame sent by the terminal before the sending module sends orthogonal frequency division multiple access (OFDMA) physical layer signaling to the terminal; After the terminal sends the OFDMA physical layer signaling, the terminal receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0131] With reference to the fourteenth possible implementation manner of the third aspect, in a fifteenth possible implementation manner of the third aspect, the uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request Or the OFDMA BA request is also used to instruct the access point to use OFDMA mode to send an ACK response or BA response to the terminal; then the sending module is also used to receive the terminal in the corresponding subchannel in the receiving module After the uplink OFDMA data information is sent, an ACK response or BA response corresponding to the uplink OFDMA data information is sent on a subchannel corresponding to the terminal in an OFDMA mode.

[0132] With reference to any one of the third aspect to the fifth possible implementation manner of the third aspect, in a sixteenth possible implementation manner of the third aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal assigned to the terminal for sending uplink OFDMA data information to the access point; then the receiving module is also used to send an orthogonal frequency channel to the terminal in the sending module After divisional multiple access OFDMA physical layer signaling, receive the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding sub-channel.

[0133] In a fourth aspect, the present invention provides a terminal, including: A receiving module, configured to receive orthogonal frequency division multiple access OFDMA physical layer signaling sent by an access point, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated by the access point to the terminal ; Wherein, the OFDMA physical layer signaling includes the identifier of the terminal and subchannel information corresponding to the identifier of the terminal;

[0134] A determining module, configured to determine the subchannel corresponding to the terminal according to the OFDMA physical layer signaling. With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the identifier of the terminal is an identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink Subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal, including:

[0135] The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, the terminal group corresponds to the subchannel.

[0136] With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the receiving module is further configured to receive an Orthogonal Frequency Division Multiple Access (OFDMA) physical Before layer signaling, receiving the mapping relationship between the identifier of the terminal group and the address of the terminal sent by the access point; then the determining module is specifically configured to judge that it is located in the terminal group according to the mapping relationship , determine the subchannel corresponding to the terminal group as the subchannel corresponding to the terminal.

[0137] With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the identifier of the terminal is an identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling uses To indicate to the terminal the subchannel allocated for the terminal, including:

[0138] The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, each terminal in the terminal group and The sub-channels are in one-to-one correspondence.

[0139] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the receiving module is specifically configured to receive the access point The transmitted Orthogonal Frequency Division Multiplexing OFDM preamble; wherein, the OFDM preamble carries the OFDMA physical layer signaling; or, is specifically used to receive the empty data packet announcement NDPA frame sent by the access point; wherein, the The NDPA frame carries the OFDMA physical layer signaling.

[0140] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the receiving module is further configured to receive the access point send The NDPA frame and the OFDM preamble sent; wherein, the NDPA frame carries the identification of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the information corresponding to the identification of the terminal in the OFDMA physical layer signaling Subchannel information; or, it is also used to receive an NDPA frame and an OFDM preamble sent by the access point; wherein, the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling , the OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

[0141] With reference to any one of the fourth aspect to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling is specifically used to send the terminal Instructing the access point to allocate a subchannel for receiving downlink OFDMA data for the terminal, the receiving module is also used to determine the subchannel corresponding to the terminal according to the OFDMA physical layer signaling in the determining module Afterwards, receiving the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a switching domain, an ultra-high throughput traffic signaling UHT-SIG_B.

[0142] With reference to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the receiving module includes:

[0143] a receiving unit, configured to receive a destination terminal address corresponding to the OFDMA data sent by the access point;

[0144] The judging unit is used to judge whether it matches the address of the destination terminal; if so, instruct the receiving unit to receive the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal.

[0145] With reference to the seventh possible implementation manner of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block Acknowledging the BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; then the OFDMA physical layer signaling is also used to indicate the The subchannel corresponding to the terminal assigned by the terminal to send the ACK response or BA response to the access point, then the terminal further includes:

[0146] a sending module, configured to, after the receiving module receives the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal, send the data information to the access point on the subchannel corresponding to the terminal in OFDMA mode; The point sends an ACK response or a BA response.

[0147] In combination with the seventh possible implementation manner of the fourth aspect, the ninth possible implementation manner of the fourth aspect In an embodiment, the OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the receiving module also uses After receiving the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal, receive an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or BA request The frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode;

[0148] Then the sending module is further configured to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0149] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the OFDMA physical layer signaling is specifically used to indicate to the terminal The subchannel corresponding to the terminal allocated for the terminal to send an ACK response or BA response to the access point; then the receiving module is specifically configured to receive the multi-user multiple-input multiple-output sent by the access point MU-MIM0 data information;

[0150] The sending module is further configured to, after the determining module determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, use OFDMA mode to send to the access point on the subchannel corresponding to the terminal ACK response or BA response.

[0151] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in an eleventh possible implementation manner of the fourth aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the receiving module is specifically used to receive the MU-MIMO data sent by the access point information; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; and receives an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, where the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode;

[0152] Then, the sending module is further configured to, after the determining module determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, use OFDMA mode to transmit to the access point on the subchannel corresponding to the terminal Send ACK response or BA response.

[0153] Combining the fourth aspect to any one of the third possible implementation manners of the fourth aspect, in the fourth In a twelfth possible implementation manner of the aspect, the OFDMA physical layer signaling is specifically used to indicate to the terminal that the terminal allocated for the terminal to send an ACK response or a BA response to the access point corresponds to the subchannel; the receiving module is specifically configured to receive the MU-MIMO data information sent by the access point; and receive the ACK request frame or BA request frame sent by the access point; wherein, the ACK request The frame or BA request frame includes dedicated information bits, and the dedicated information bits are used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the ACK request frame or BA request frame carries the 0FDMA physical layer signaling;

[0154] Then, the sending module is further configured to, after the determining module determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, use OFDMA mode to transmit to the access point on the subchannel corresponding to the terminal Send ACK response or BA response.

[0155] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in a thirteenth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling carries an OFDMA ACK request or An OFDMA BA request, the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send an ACK response or BA response to the access point; the OFDMA physical layer signaling is specifically used to send the terminal Indicate the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the receiving module is also configured to use the OFDMA physical layer signaling in the determining module After determining the subchannel corresponding to the terminal, receiving OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal;

[0156] The sending module is further configured to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0157] With reference to any one of the fourth aspect to the third possible implementation manner of the fourth aspect, in a fourteenth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the receiving module is also configured to use the OFDMA physical layer signal in the determining module After determining the subchannel corresponding to the terminal, receiving the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal; and receiving the ACK request frame or BA sent by the access point A request frame; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode;

[0158] The sending module is further configured to use OFDMA mode to transmit to all the subchannels corresponding to the terminal The access point sends an ACK response or a BA response.

[0159] With reference to any one of the fourth aspect to the fifth possible implementation manner of the fourth aspect, in a fifteenth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel allocated for the terminal to send uplink OFDMA data information to the access point; then the sending module is also used to receive the Orthogonal Frequency Division Multiple Access OFDMA sent by the access point in the receiving module before the physical layer signaling, sending an uplink transmission frame to the access point; and is also used to use OFDMA mode in the Sending the uplink OFDMA data information to the access point on the subchannel corresponding to the terminal.

[0160] With reference to the fifteenth possible implementation manner of the fourth aspect, in the sixteenth possible implementation manner of the fourth aspect, the uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request Or the OFDMA BA request is also used to instruct the access point to send an ACK response or BA response to the terminal in OFDMA mode; then the receiving module is also used to send the access point to the access point in the sending module After the uplink OFDMA data information, receive the ACK response or BA response corresponding to the uplink OFDMA data information sent by the access point on the subchannel corresponding to the terminal.

[0161] With reference to any one of the fourth aspect to the fifth possible implementation manner of the fourth aspect, in a seventeenth possible implementation manner of the fourth aspect, the OFDMA physical layer signaling is specifically used to send the The terminal indicates the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point; then the sending module is also used to transmit the OFDMA physical layer signaling according to the OFDMA physical layer signaling in the determining module After the subchannel corresponding to the terminal is determined, the uplink OFDMA data information is sent to the access point on the subchannel corresponding to the terminal in an OFDMA mode.

[0162] The present invention provides an indication method for data transmission, an access point, and a terminal. The OFDMA physical layer signaling is sent to the terminal through the access point, so that each of the above-mentioned terminals knows which subchannel it corresponds to, so that the terminal can correspond to the subchannel itself. The corresponding operation is performed on the sub-channel. SP, through the way that the access point allocates sub-channels to each terminal according to the OFDMA physical layer signaling, the access point can indicate sub-channels for more terminals, that is, the access point indicates sub-channels for the terminals to the number of terminals. limit. Description of drawings

[0163] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will A brief introduction to the accompanying drawings required in the embodiments or prior art descriptions, obviously, the accompanying drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, without paying any inventive step Other drawings can also be obtained from these drawings under the premise of labor.

[0164] 1 is a schematic flow diagram of Embodiment 2 of the indication method for data transmission provided by the present invention; FIG. 2 is a schematic flow diagram of Embodiment 4 of the indication method for data transmission provided by the present invention; FIG. 2a is a schematic diagram of data transmission provided by the present invention 1;

[0165] Figure 2b is a second schematic diagram of data transmission provided by the present invention;

[0166] Fig. 2c is the third schematic diagram of data transmission provided by the present invention;

[0167] Figure 2d is a schematic diagram 4 of data transmission provided by the present invention;

[0168] FIG. 3 is a schematic flowchart of Embodiment 5 of the indication method for data transmission provided by the present invention; FIG. 3a is a schematic diagram of data transmission provided by the present invention V;

[0169] Fig. 3b is the sixth schematic diagram of data transmission provided by the present invention;

[0170] FIG. 4 is a schematic flowchart of Embodiment 6 of the indication method for data transmission provided by the present invention; FIG. 4a is a schematic diagram of data transmission provided by the present invention VII;

[0171] Fig. 4b is a schematic diagram eight of data transmission provided by the present invention;

[0172] Fig. 5 is a schematic flowchart of Embodiment 7 of the indication method for data transmission provided by the present invention; Fig. 6 is a schematic flowchart of Embodiment 8 of the indication method for data transmission provided by the present invention; Fig. 7 is a schematic flowchart of Embodiment 8 of the indication method for data transmission provided by the present invention A schematic flow diagram of Embodiment 9; FIG. 8 is a schematic flow diagram of Embodiment 10 of the indication method for data transmission provided by the present invention; FIG. 9 is a schematic flow diagram of Embodiment 11 of the indication method for data transmission provided by the present invention; A schematic flow chart of Embodiment 12 of the indication method for data transmission provided by the invention; FIG. 10a is a schematic diagram of data transmission ninth provided by the invention;

[0173] Figure 10b is a tenth schematic diagram of data transmission provided by the present invention;

[0174] FIG. 11 is a schematic flowchart of Embodiment 13 of the indication method for data transmission provided by the present invention; FIG. 11a is a schematic diagram of data transmission eleventh provided by the present invention;

[0175] Figure l ib is a schematic diagram of data transmission twelve provided by the present invention;

[0176] Figure 12 is a schematic flowchart of Embodiment 14 of the indication method for data transmission provided by the present invention; Figure 13 is a schematic flowchart of Embodiment 15 of the indication method for data transmission provided by the present invention; Figure 14 is a schematic flowchart of Embodiment 15 of the indication method for data transmission provided by the present invention A schematic flow chart of the seventeenth embodiment of the indicating method; Figure 15 is a schematic flowchart of Embodiment 18 of the indication method for data transmission provided by the present invention; Figure 16 is a schematic flowchart of Embodiment 19 of the indication method for data transmission provided by the present invention; Figure 17 is a schematic flowchart of Embodiment 19 of the indication method for data transmission provided by the present invention Figure 18 is a schematic flow chart of Embodiment 21 of the indication method for data transmission provided by the present invention; Figure 19 is a flow chart of Embodiment 22 of the indication method for data transmission provided by the present invention Schematic diagram; FIG. 20 is a schematic flowchart of the twenty-third embodiment of the indication method for data transmission provided by the present invention; FIG. 21 is a schematic flowchart of the twenty-fourth embodiment of the indication method for data transmission provided by the present invention; Figure 23 is a schematic flow chart of Embodiment 26 of an indication method for data transmission provided by the present invention; Figure 24 is a schematic flow chart of Embodiment 2 of an access point provided by the present invention Schematic;

[0177] FIG. 25 is a schematic structural diagram of the terminal embodiment 1 provided by the present invention;

[0178] FIG. 26 is a schematic structural diagram of the second embodiment of the terminal provided by the present invention;

[0179] FIG. 27 is a schematic structural diagram of Embodiment 3 of the terminal provided by the present invention;

[0180] Figure 28 is a block diagram of an IDFT implementation in which the access point sends downlink data information to the terminal in OFDMA mode;

[0181] FIG. 29 is a schematic structural diagram of Embodiment 4 of the access point provided by the present invention;

[0182] FIG. 30 is a block diagram of an access point implementing uplink OFDMA data information transmission through OFDMA physical layer signaling;

[0183] FIG. 31 is a schematic structural diagram of Embodiment 4 of the terminal provided by the present invention;

[0184] Fig. 32 is a schematic structural diagram of the fifth embodiment of the terminal provided by the present invention. detailed description

[0185] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0186] The terminal involved in this application, that is, the user equipment, may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and / or data connectivity to the user, a handheld device with a wireless connection function, or a device connected to Other processing equipment for wireless modems. none The line terminal can communicate with one or more core networks via a wireless access network (for example, RAN, Radio Access Network), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile terminal The computer, for example, may be a portable, pocket, handheld, built-in computer or vehicle-mounted mobile device, and they exchange language and / or data with the radio access network. For example, Personal Communication Service (PCS, Personal Communication Service) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL, Wireless Local Loop) station, Personal Digital Assistant (PDA, Personal Digital Assistant) and other equipment . The wireless terminal may also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile station (Mobile), a remote station (Remote Station), an access point ( Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), user equipment (User Device), or user equipment (User Equipment).

[0187] The access point (for example: base station) involved in this application may be a WLAN access point (Access Point), and may also refer to an access network that communicates with wireless terminals through one or more sectors on the air interface. equipment. The base station may be used to convert received over-the-air frames to and from IP packets, acting as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate attribute management for the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, may also be a base station (NodeB) in WCDMA, and may also be an evolved base station (NodeB or eNB or e_NodeB, evolutional Node B) in LTE , this application is not limited.

[0188] Embodiment 1 of the present invention provides a method for indicating data transmission. The method involved in this embodiment is a specific process in which the access point instructs the terminal which subchannel corresponds to through OFDMA physical layer signaling. The method includes: the access point sends OFDMA physical layer signaling to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, so that the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling. channel; wherein, the OFDMA physical layer signaling includes a terminal identifier and subchannel information corresponding to the terminal identifier.

[0189] It should be noted that there may be one terminal or multiple terminals in the embodiment of the present invention. Since the operation performed by the access point on each terminal is the same, all terminals are used for description in the embodiments of the present invention. Specifically, the access point uses the OFDM mode to send OFDMA physical layer signaling to the terminal, that is, the access point can send the OFDMA physical layer signaling to a certain terminal within its coverage, but other terminals within the coverage of the access point The terminal can also monitor and correctly demodulate the OFDMA physical layer signaling. The OFDMA physical layer signaling in the embodiment of the present invention includes the identifier of the terminal and the subchannel information corresponding to the identifier of the terminal, which is used to indicate to the terminal the subchannel information allocated for the terminal, so that each terminal knows its corresponding subchannel channel, and perform corresponding operations on this sub-channel, for example, you can receive your own part of the data sent by the access point on your corresponding sub-channel, and you can also send corresponding data to the access point on your corresponding sub-channel. response information or uplink data information, etc. The terminal identifier in the above OFDMA physical layer signaling may be the identifier of a single terminal group, or may be the identifiers of multiple terminal groups, and the terminal group may include multiple terminals.

[0190] The present invention does not limit the channel bandwidth of the sub-channel, and the access point determines the bandwidth of the sub-channel according to the bandwidth requirement of the terminal. Moreover, the indicated subchannel can be presented in various forms, which can be the center frequency and bandwidth of the subchannel, or the channel number and bandwidth of the starting frequency band, or the range of channel numbers from the starting frequency band to the ending frequency band, etc. , the present invention is not limited.

[0191] The OFDMA physical layer signaling involved in this embodiment is a subchannel indicated by a terminal, and may correspond to one terminal or may correspond to multiple terminals. For example: multiple terminals can be divided into a group, and the OFDMA physical layer signaling allocates a subchannel to this group, then all terminals in the group can use the subchannel.

[0192] The format of the signaling part in the prior art can only support a bandwidth of 20MHz, and is for 48 subcarriers, and users are assigned to each subcarrier. When a bandwidth greater than 20MHz is used, there is no corresponding extension scheme to support it in the prior art; However, the OFDMA physical layer signaling in the embodiment of the present invention can support a larger bandwidth, and for the number of terminals, multiple terminals are allocated to indicate the allocated subchannel, and the subchannel includes one or more subcarriers . Therefore, the subject of the embodiment of the present invention is different from that of the prior art (the prior art assigns users to subcarriers, while the embodiment of the present invention assigns subchannels or subcarriers to users), and the prior art only Instructions can be made for 48 terminals, while OFDMA physical layer signaling indicates that subchannels for terminals are not limited by bandwidth, and subchannels can be allocated for more terminals (more than 48 users) within a larger bandwidth. Of course, in this embodiment of the present invention, subchannels can still be allocated to less than 48 terminals.

[0193] In the data transmission indication method provided by the embodiment of the present invention, the access point sends OFDMA physical layer signaling to the terminal, so that each of the above-mentioned terminals knows which subchannel it corresponds to, so that The terminal can perform corresponding operations on its corresponding sub-channel. That is, through the access point according to

[0194] OFDMA physical layer signaling allocates subchannels for each terminal, so that the access point can indicate subchannels for more terminals, that is, there is no limit to the number of terminals for the access point to indicate subchannels for the terminals. Fig. 1 is a schematic flowchart of Embodiment 2 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a feasible implementation manner of indicating a subchannel for a terminal through OFDMA physical layer signaling. Further, on the basis of the above-mentioned first embodiment, the identifier of the above-mentioned terminal may be an identifier of one or more terminal groups, each terminal group includes at least one terminal, and the sub-channel information includes an uplink sub-channel or a downlink sub-channel Or uplink and downlink bidirectional sub-channels. The method includes:

[0195] S101: The access point sends to the terminal the mapping relationship between the identifier of the terminal group and the address of the terminal, so that the terminal knows the terminal group it belongs to.

[0196] Specifically, the terminal needs to know which terminal group it belongs to, and then it can know its corresponding subchannel when the access point allocates subchannels for the terminal group. Therefore, the access point needs to send the mapping relationship between the identifier of the terminal group and the address of the terminal to each terminal, so that each terminal knows the terminal group it is in. Among them, a simple method of notifying the terminals of the mapping relationship between the identification of the terminal group and the address of each terminal in the form of a group management frame can be referred to in Table 1, specifically:

[0197] Table 1

[0199] Through the terminal group management frame shown in Table 1, the terminal can know the identity of the terminal group it is in.

[0200] S102: The access point sends OFDMA physical layer signaling to the terminal, so that the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling; wherein, the OFDMA physical layer signaling includes the identifier of the terminal and the corresponding subchannel corresponding to the identifier of the terminal. subchannel information, the OFDMA physical layer signaling is used to indicate to each terminal group whether the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel.

[0201] Optionally, the OFDMA physical layer signaling may indicate through a dedicated indication bit that the subchannel allocated to the terminal is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel. That is, on The above OFDMA physical layer signaling can not only indicate the allocated subchannels for the terminal group, but also indicate to the terminal group that the allocated subchannels are uplink subchannels or downlink subchannels or uplink and downlink bidirectional subchannels.

[0202] Specifically, the above terminal identifier is an identifier of one or more terminal groups, and the OFDMA physical layer signaling is used to indicate to one or more terminal groups the subchannel information allocated for each terminal group; wherein, the terminal group and the subchannel One to one correspondence.

[0203] The relevant fields contained in the above OFDMA physical layer signaling indication may be in the format shown in Table 2 below. Wherein, the group number in Table 2 is used to indicate the current group identifiers of multiple terminals, and the terminal may be a station (Station, hereinafter referred to as STA). The fields shown in Table 2 may indicate that a subchannel is allocated to each terminal group, and each terminal group here may include at least one terminal. For example, terminal group 1 includes STA1 and STA2, terminal group 2 includes STA3-STA5, and group n includes STA k-STA n. According to this indication method, both STA1 and STA2 work on sub-channel 1, STA3-STA5 work on sub-channel 2, and STA k-STA n all work on sub-channel n. Through this instruction, the terminal can know its corresponding subchannel, and the access point can also flexibly schedule the terminals in the terminal group on each allocated subchannel. In addition, various terminal groups may have common elements, for example, terminal group 1 includes STA1-STA3, and terminal group 2 may include STA2-STA5. Here, STA2 and STA3 are in terminal group 1 and terminal group 2 at the same time. In this way, within the effective range of the indication, the access point can flexibly allocate all subchannels to each STA, which further increases the flexibility of the access point for terminal scheduling.

[0204] Table 2

[0205] In another case, if in a subchannel, the subcarrier spacing in the OFDMA mode is different from the subcarrier spacing in the OFDM mode, a special case is that the subcarrier spacing in the OFDM mode is the subcarrier spacing in the OFDMA mode Integer multiples (K times). In this case, the effective indication of the working sub-channels of multiple terminals can be realized by simply grouping each sub-carrier in OFDMA mode. Since the number of subcarriers in the OFDM mode per 20MHz (that is, the bandwidth of a unit subchannel) is 64, the number of subcarriers in the OFDMA mode is 64*K (* is a multiplication sign), so the access point can use The 64*K subcarriers in the subchannel are allocated to each terminal in the terminal group (see Table 3), That is, each terminal corresponds to several (one or more) subcarriers. That is to say, Table 3 is actually a sub-channel refinement of Table 2, where sub-carrier A can be the sub-carrier identifier of the OFDMA mode (ie

[0206] 64*Κ, can be any integer from 1 to ), and can also be the subcarrier identifier of the OFDM mode (ie =64). It should be noted that the existing technology cannot support the refinement of the subcarrier spacing, and thus cannot provide instructions for more users at 20 MHz.

[0207] For the case where the subcarrier ^ is the subcarrier identifier of the OFDMA mode, the indication unit granularity of the method in this embodiment is specific to each subcarrier of OFDMA (that is, one subcarrier corresponds to one terminal); for the subcarrier is a subcarrier of the OFDM mode In the case of identification, the unit granularity indicated by the method in this embodiment is K OFDMA subcarriers. Therefore, the method of the embodiment of the present invention can divide the sub-channels with narrower sub-carrier intervals for the unit bandwidth (for example, the unit bandwidth is 20MHz), and implement the working sub-channels for multiple terminals by simply grouping the divided sub-channels. A valid indication of the channel.

[0208] In addition, when K=4, each 64 consecutive OFDMA subcarriers occupy one channel unit (5MHz). In this case, the channel number in Embodiment 1 and Embodiment 2 can also be used as an indication manner.

[0209] table 3

[0211] In the data transmission indication method provided by the embodiment of the present invention, the access point sends to the terminal OFDMA physical layer signaling that carries the identification of the terminal and the subchannel information corresponding to the identification of the terminal, and the access point also sends to each terminal The mapping relationship between the identification of the terminal group and the addresses of each terminal is sent, so that each of the above-mentioned terminals knows the terminal group it is in, and further knows its corresponding sub-channel, so as to perform corresponding operations on the sub-channel. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can indicate subchannels for more terminals, that is, the number of subchannels indicated by the access point for the terminals does not affect the number of terminals limit. Embodiment 3 of the present invention provides a method for indicating data transmission. The method involved in this embodiment is another feasible implementation manner in which an access point indicates a subchannel for a terminal through OFDMA physical layer signaling. On the basis of the first embodiment above, the OFDMA physical layer signaling may include a terminal identifier and subchannel information corresponding to the terminal identifier, and the terminal identifier is an identifier of a separate terminal group, The terminal group includes at least two terminals, and the OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel.

[0212] Optionally, the OFDMA physical layer signaling can use a dedicated indicator bit to indicate that the subchannel allocated to the terminal is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; each terminal in the terminal group corresponds to the subchannel one by one . That is to say, the above OFDMA physical layer signaling can not only indicate the allocated subchannels for each terminal in the terminal group, but also can indicate to the terminal that the allocated subchannels are uplink subchannels or downlink subchannels or uplink and downlink bidirectional subchannels.

[0213] Specifically, the relevant fields contained in the above OFDMA physical layer signaling indication may be in the format shown in Table 4 below. The group number is used to indicate the group identifier of the current terminal group, and the subsequent subchannels correspond to the STAs in the terminal group corresponding to the group number one by one, that is, the access point allocates the subchannels to the STAs in the terminal group in sequence. each terminal. That is to say, the STAs in the group corresponding to the group number are STA1-STAn in order, then according to this format, STA1 corresponds to sub-channel 1, STA2 corresponds to sub-channel 2, until STA n corresponds to sub-channel n.

[0214] For the case where the sub-carrier spacing in the sub-channel in the OFDM mode and the OFDMA mode are different, the sub-channel allocated by each STA in the group can be indicated only by the channel number, etc.; it can also be indicated by the sub-carrier range, as shown in Table 4 ' So ^

[0215] Group No. Subchannel 1 Subchannel 2 … Subchannel n Table 4,

[0216] Group No. Subcarrier Subcarrier A+wide k 2 … subcarrier K k N That is to say, each terminal in the above terminal group corresponds to a different subchannel, and since the OFDMA physical layer signaling can support a larger bandwidth (not limited by the 20MHz bandwidth), it can indicate subchannels for more terminals .

[0217] In the data transmission indication method provided by the embodiment of the present invention, the access point sends OFDMA physical layer signaling to the terminal, so that each of the above-mentioned terminals knows which subchannel it corresponds to, so that the terminal can execute on its corresponding subchannel corresponding operation. SP, the access point can indicate subchannels for more terminals through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling. FIG. 2 is a schematic flowchart of Embodiment 4 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is to send the OFDMA physical layer signaling to the terminal by carrying the OFDMA physical layer signaling in the OFDM preamble, so that the terminal can know its corresponding subchannel according to the OFDMA physical layer signaling, and receive the received signal on the corresponding subchannel. The process of downlink OFDMA data information sent by the entry point. The method includes:

[0218] S201: The access point sends an OFDM preamble to the terminal; wherein, the OFDM preamble carries OFDMA physical layer signaling.

[0219] Specifically, the access point uses OFDM mode to send an OFDM preamble to any terminal within its coverage; wherein, the OFDM preamble includes a short training field (Short Training Field, hereinafter referred to as STF), a long training field (Long Training Field, hereinafter LTF for short), legacy signaling (Legacy Signaling, hereinafter referred to as L-SIG), ultra high throughput signaling A (Ultra High Throughput Signaling A, hereinafter referred to as UHT_SIG_A), and the UHT_SIG_A carries OFDMA physical layer signaling. It should be noted that the OFDM method is that the access point sends an OFDM preamble to a terminal, but at this time the access point does not know which specific terminal it is sent to, so the access point sends an OFDM preamble to any terminal, and all active The (active) terminal will monitor and receive, and then obtain the OFDMA physical layer signaling, so as to know its corresponding channel.

[0220] It should be noted that, for the manner of indicating the subchannel by the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the first to third embodiments above, and details will not be repeated here in the embodiment of the present invention.

[0221] S202: The access point uses the OFDMA mode to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes: OFDMA preamble and OFDMA data (Data Symbol); the OFDMA preamble includes a switching field (Switching Field) 1. Ultra High Throughput Signaling B (UHT-SIG-B for short).

[0222] Specifically, the access point uses the OFDMA mode to send downlink OFDMA data information on the sub-channels corresponding to the terminals, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the sub-channels corresponding to the terminals, thereby saving information. Reduce the overhead and bring the gain of multi-user diversity. In addition, the subchannel corresponding to the terminal may also include a main channel of a Basic Service Set (BSS for short), which is used for interactive control and management signaling between the access point and the terminal; that is, the access After the OFDMA physical layer signaling is sent on the main channel, the main channel can be released; and downlink OFDMA data information can also be sent to the terminal through the main channel and other sub-channels together.

[0223] The data transmission frame format of the above OFDM preamble and downlink OFDMA data information can be referred to the following table 5. Moreover, when the above OFDMA physical layer signaling and OFDMA data are sent together, the format in Table 5 can be used; if only separate OFDMA physical layer signaling is sent, only the OFDM preamble can be sent.

[0224] table 5

[0226] It should be noted that the content transmitted in the OFDMA mode is independent of each terminal, that is, the Switching Field, UHT-SIG-B and OFDMA data on the sub-channels corresponding to each terminal are independent of each other. The aforementioned Switching Field may include Ultra High Throughput Short Training Field (UHT-STF for short) and Ultra High Throughput Long Training Field (UHT-LTF for short). In the OFDMA mode, the UHT-STF is used for the terminal to complete automatic gain control (Automatic Gain Control, hereinafter referred to as AGC) or channel synchronization of sub-channels or all channels indicated by OFDMA physical layer signaling. UHT-LTF is used by the terminal to complete channel estimation of sub-channels or all channels. If the physical layer signaling in UHT-SIG-A only allocates channels to the terminal group, then UHT-SIG-B can be used by the sending end to further indicate the terminals in the terminal group corresponding to the subchannel in the subchannel .

[0227] If in the mode of OFDMA+MU-MIMO, UHT-STF is used for AGC or channel synchronization of sub-channels or all channels indicated by OFDMA physical layer signaling and corresponding space-time streams (space-time streams) by the terminal; UHT The -LTF is used for channel estimation by the terminal on the sub-channels or all channels indicated by the OFDMA physical layer signaling and the sub-channels corresponding to the space-time stream. In addition, the space-time flow allocation information of MU-MIMO can be carried in UHT-SIG-A, and can also be carried in UHT-SIG-B.

[0228] In addition, the access point can use the OFDM mode to send the OFDM preamble on the main channel (see the example in Figure 2a), and can also send the OFDM preamble on multiple sub-channels in a repeated manner (see the example in Figure 2b). Afterwards, the access point switches to the OFDMA mode, and sends the OFDMA preamble and OFDMA data to the terminal on the subchannel indicated above. On the other hand, for the case where the subcarrier spacing between OFDM and OFDMA is different (take the unit channel as 20MHz as an example), the sending of OFDM preamble and downlink OFDMA data information can refer to the example in Figure 2c, that is, the unit channel (the main channel in the figure ) is divided into multiple subcarriers, and one or more subcarriers correspond to one terminal; For OFDM and OFDMA subcarrier spacing is different, and the bandwidth is the sum of the bandwidth of multiple unit channels, For information about sending OFDM preamble and downlink OFDMA data, please refer to the example in Figure 2d.

[0229] Correspondingly, the terminal uses the OFDM mode to detect and receive the OFDM preamble in the idle state. Read the OFDMA physical layer signaling in UHT-SIG-A; and switch to the subchannel indicated by the OFDMA physical layer signaling, readjust the AGC and complete the estimation of the channel state information of the corresponding subchannel, and in the corresponding subchannel The channel demodulates the downlink OFDMA data information to obtain its own part of the OFDMA preamble and OFDMA data.

[0230] Another receiving method for the terminal is that the terminal uses the OFDM mode to detect and receive the OFDM preamble in the idle state. After the terminal receives the OFDM preamble in the OFDM mode (it can be received on the main channel or on multiple sub-channels receiving), read the OFDMA physical layer signaling in UHT-SIG-A according to the OFDM method; and switch to the entire bandwidth occupied by the access point sending data this time, readjust the AGC, and complete the estimation indicated by the OFDMA physical layer signaling The channel state information of the sub-channel or the channel state information of the entire bandwidth is estimated, and the downlink OFDMA data information is demodulated in the corresponding sub-channel, and the OFDMA preamble and OFDMA data belonging to it are obtained.

[0231] In the data transmission indication method provided by the embodiment of the present invention, the access point sends an OFDM preamble carrying OFDMA physical layer signaling to the terminal, so that the terminal can obtain the OFDMA physical layer signaling from the OFDM preamble, so that according to the OFDMA physical layer Layer signaling to know on which sub-channel it should receive the downlink OFDMA data information corresponding to itself. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when receiving data from the access point, that is, the access point is a terminal indicator Channels are not limited to the number of terminals. Fig. 3 is a schematic flowchart of Embodiment 5 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point sends the OFDMA physical layer signaling to the terminal by carrying the OFDMA physical layer signaling in a Null Data Packet Announcement (Null Data Packet Announcement, hereinafter referred to as NDPA) frame, so that the terminal obtains the OFDMA physical layer signaling from the NDPA frame. Layer signaling, so as to obtain the corresponding subchannel according to the OFDMA physical layer signaling, and receive the downlink OFDMA data information sent by the access point on the corresponding subchannel. The method includes:

[0232] S301: The access point sends an NDPA frame to the terminal; wherein, the NDPA frame carries the above OFDMA physical layer signaling. Specifically, the embodiment of the present invention adopts a dedicated NDPA frame to carry OFDMA physical layer signaling, so as to reduce overhead caused when transmitting OFDMA physical layer signaling. The format of the NDPA frame in the embodiment of the present invention is shown in Table 6, specifically:

[0233] table 6

[0235] It is worth noting that the access point can use OFDM mode to send NDPA frames to a certain terminal within its coverage, which can be sent on a sub-channel (for example: the main channel) (see Figure 3a for example), or in multiple sub-channels. The NDPA frame is sent on the channel (refer to the example in Fig. 3b), and other terminals can monitor the NDPA frame. Afterwards, the access point also needs to use the OFDM mode to send the OFDM preamble. The above-mentioned OFDMA physical layer signaling can be carried in the NDPA frame, and can also be carried in the NDPA frame and the OFDM preamble at the same time, but in order to save signaling overhead, it is generally only carried in the NDPA frame. Optionally, when the OFDMA physical layer signaling is carried in the NDPA frame, the OFDM preamble may further indicate a specific terminal identifier in the terminal group.

[0236] It should be noted that, for the manner of indicating the subchannel by the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the first to third embodiments above, and details will not be repeated here in the embodiment of the present invention.

[0237] S302: The access point uses OFDMA mode to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes: OFDMA preamble and OFDMA data; the OFDMA preamble includes a switching field (Switching Field), UHT- SIG_B.

[0238] Specifically, the access point uses the OFDMA mode to send downlink OFDMA data information, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the subchannels corresponding to each terminal, and then can make full use of corresponding time-frequency resources.

[0239] Correspondingly, the terminal uses OFDM to detect and receive NDPA frames in the idle state, and reads the OFDMA physical layer signaling according to the OFDM method; after that, the terminal also uses OFDM to receive the OFDM preamble; and uses the sub-frame indicated by the OFDMA physical layer signaling channel, switch to the OFDMA mode, and receive the OFDMA preamble and OFDMA data sent by the access point in the OFDMA mode on the sub-channel.

[0240] In the data transmission indication method provided by the embodiment of the present invention, the access point sends an NDPA frame carrying OFDMA physical layer signaling to the terminal, so that the terminal can obtain the OFDMA physical layer signaling from the NDPA frame, so that according to the OFDMA physical layer Layer signaling to know which sub-channel it should receive Receive the downlink OFDMA data information corresponding to itself, so as to receive the downlink OFDMA data information sent by the access point on the corresponding subchannel. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when receiving data from the access point, that is, the access point is a terminal indicator The channel does not limit the number of terminals; in addition, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the sub-channels corresponding to each terminal, so that corresponding time-frequency resources can be fully utilized. FIG. 4 is a schematic flowchart of Embodiment 6 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point separately carries the content contained in the OFDMA physical layer signaling in the NDPA frame and the OFDM preamble and sends it to the terminal, so that the terminal obtains the OFDMA physical layer signaling from the NDPA frame and the OFDM preamble , so as to obtain the subchannel corresponding to itself according to the OFDMA physical layer signaling, and receive downlink OFDMA data information sent by the access point on the corresponding subchannel. The method includes:

[0241] S401: The access point sends the NDPA frame and the OFDM preamble to the terminal.

[0242] Specifically, the NDPA frame and the OFDM preamble can carry OFDMA physical layer signaling in two ways, which are:

[0243] The first method: the access point sends an NDPA frame and an OFDM preamble to the terminal; wherein, the NDPA frame carries the identification of the terminal in the above OFDMA physical layer signaling, and the OFDM preamble carries the identification of the terminal in the above OFDMA physical layer signaling Corresponding subchannel information. The identifier of the terminal here may be the identifier of one or more terminal groups in Embodiment 2, and the subchannel corresponds to the terminal group one by one; it may also be the identifier of a single terminal group in Embodiment 3, and the subchannel corresponds to the terminal group. There is a one-to-one correspondence between each terminal in the group.

[0244] The second type: the access point sends an NDPA frame and an OFDM preamble to the terminal; wherein, the NDPA frame carries the subchannel information corresponding to the identification of the terminal in the OFDMA physical layer signaling described above, and the OFDM preamble carries the OFDMA physical layer signaling described above The ID of the terminal in . The identifier of the terminal here may be the identifier of one or more terminal groups in Embodiment 2, and the subchannel corresponds to the terminal group one by one; it may also be the identifier of a single terminal group in Embodiment 3, and the subchannel corresponds to the terminal group. There is a one-to-one correspondence between each terminal in the group.

[0245] That is to say, the above-mentioned NDPA frame and the OFDM preamble can cooperate with each other to indicate the above-mentioned OFDMA physical layer signaling. The user group information field in the above Table 5 may include the identifier of the terminal, and may also include subchannel information corresponding to the identifier of the terminal. In addition, the control information field in Table 5 may also indicate the effective time length of the subchannel information of the currently indicated terminal or terminal group, so that the terminal can The length of time determines whether the subchannel information indication of the terminal or terminal group is valid or expired, and if not expired, the terminal can continue to use the current subchannel to receive and send data.

[0246] If the NDPA frame carries the identity of the terminal and the subchannel information corresponding to the identity of the terminal (that is, carries the complete OFDMA physical layer signaling), the OFDM preamble may no longer carry the identity of the terminal and the information corresponding to the identity of the terminal subchannel information (the OFDM preamble can also carry OFDMA physical layer signaling, the specific description has been described in the foregoing embodiments, and will not be repeated here). The subchannel information corresponding to the identifier of the terminal in the NDPA frame needs to be carried; if only the subchannel information is carried in the NDPA frame, the OFDM preamble also needs to carry the identifier of the terminal corresponding to the subchannel information in the NDPA frame.

[0247] It should be noted that, for the manner of indicating the subchannel by the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the first to third embodiments above, and details will not be repeated here in the embodiment of the present invention.

[0248] S402: The access point uses OFDMA mode to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes: OFDMA preamble and OFDMA data; the OFDMA preamble includes a switching field (Switching Field), UHT- SIG_B.

[0249] Specifically, the access point uses the OFDMA mode to send downlink OFDMA data information, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the subchannels corresponding to each terminal, and then can make full use of corresponding time-frequency resources.

[0250] Correspondingly, the terminal receives the NDPA frame in the OFDM mode in the idle state, and reads a part of the OFDMA physical layer signaling carried in the NDPA frame according to the OFDM mode; after that, the terminal also receives the OFDM preamble in the OFDM mode, and then reads the OFDM preamble The supplementary part of the OFDMA physical layer signaling; After that, according to the subchannel indicated by the OFDMA physical layer signaling after the combination of the above NDPA frame and OFDM preamble, switch to the OFDMA mode and read on the corresponding subchannel / demodulates its own part of 0FDMA preamble and 0FDMA data.

[0251] In the data transmission indication method provided by the embodiment of the present invention, the access point sends the NDPA frame and the OFDM preamble carrying OFDMA physical layer signaling to the terminal, so that the above-mentioned terminals know which sub-network they should be in through the NDPA frame and the OFDM preamble. Receive downlink OFDMA data information corresponding to itself on the channel, so as to receive downlink OFDMA data information sent by the access point. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when receiving data from the access point, that is, the access point is the terminal indicator There is no limit to the number of terminals on the channel; in addition, the access point can send multiple The terminal sends downlink OFDMA data information at the same time, so that corresponding time-frequency resources can be fully utilized. Further, on the basis of the above-mentioned embodiments shown in FIG. 2 to FIG. 4, as a feasible implementation manner of the embodiment of the present invention, the method involved in this embodiment is to send downlink OFDMA data to the terminal at the access point After the message, the process of receiving the ACK response or BA response sent by the terminal on the corresponding sub-channel. Optionally, the foregoing OFDMA physical layer signaling or OFDMA data carries an OFDMA acknowledgment (Acknowl edge, hereinafter referred to as ACK) request or an OFDMA block acknowledgment (Block ACK, hereinafter referred to as BA) request, and the OFDMA ACK request or OFDMA BA request is used To instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; then the above OFDMA physical layer signaling is also used to instruct the terminal to send an ACK response or BA response to the access point The subchannel corresponding to the terminal. After the above S202 or S302 or S402, the following actions of S10 can be performed:

[0252] S 10: The access point receives the ACK response or BA response sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode.

[0253] Specifically, in order to indicate that the downlink OFDMA data information sent by the access point is correctly received by each terminal, each terminal must reply an ACK response or a BA response to the access point. If the access point carries an OFDMA ACK request or an OFDMA BA request in the OFDMA data or OFDMA physical layer signaling (see Figure 4a, taking the OFDMA ACK request as an example), then the terminal will Indicates that after receiving downlink OFDMA data information on its corresponding sub-channel, it can directly reply ACK or BA response on the sub-channel indicated by the OFDMA physical layer signaling in the form of OFDMA. Wherein, the ACK response corresponds to the OFDMA ACK request, and the BA response corresponds to the OFDMA BA request. Afterwards, the access point receives the ACK response or BA response sent by each terminal on the corresponding sub-channel. That is to say, multiple terminals can simultaneously send responses to the access point on their corresponding sub-channels, making full use of corresponding time-frequency resources.

[0254] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the downlink OFDMA data information sent by the access point on the subchannel indicated by the OFDMA physical layer signaling, and multiple terminals can send the data information to the access point on the corresponding subchannel Simultaneously send ACK response or BA response, SP, through the way that the access point assigns subchannels to each terminal according to OFDMA physical layer signaling, so that the access point can send ACK response or BA response to the access point for more terminals When indicating, the access point indicates that the number of sub-channels for the terminal is not limited to the number of terminals; and makes the ACK response or BA of multiple terminals Responses are transmitted to the access point in parallel, making full use of corresponding time-frequency resources. Further, on the basis of the above-mentioned embodiments shown in FIG. 2 to FIG. 4, as another feasible implementation manner of the embodiment of the present invention, the method involved in this embodiment is that the access point transmits the OFDMA physical After layer signaling and downlink OFDMA data information, send a separate ACK request frame or BA request frame to the terminal, so that the terminal can send an ACK response or BA response to the access point on the subchannel indicated by the OFDMA physical layer signaling .

[0255] The foregoing OFDMA physical layer signaling may also be used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or BA response to the access point. After the above S202 or S302 or S402, the following steps can be performed:

[0256] S20: The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK to the access point in OFDMA mode response or BA response.

[0257] Specifically, after the access point sends the downlink OFDMA data information to the terminal, it can also send a separate ACK request frame or BA request frame to the terminal (see FIG. 4b, taking a separate BA request frame as an example), the ACK request frame or The BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Optionally, the ACK request frame or BA request frame may carry the above-mentioned OFDMA physical layer signaling, or may not carry the above-mentioned OFDMA physical layer signaling. The terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling. If the ACK request frame or BA request frame does not carry the above OFDMA physical layer signaling, then the terminal replies with an ACK response or BA response on the subchannel corresponding to each terminal when the access point sends downlink OFDMA data, that is, the terminal can send itself The sub-channel for receiving downlink OFDMA data information is used as the sub-channel for replying ACK response or BA response.

[0258] The expression form of the dedicated information bit may be to identify the ACK request frame or BA request frame as a frame type used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode (that is, different from the existing new frame type of ACK request frame or BA request frame). Another form of expression of the dedicated information bit can also be, without changing the frame type of the ACK request frame or the BA request frame, directly using the dedicated information bit to instruct the terminal to use the OFDMA mode to send an ACK response to the access point or BA response.

[0259] In addition, similar to the aforementioned OFDM preamble, the ACK request frame or the BA request frame can only be It can also be sent on all sub-channels in a manner of repeated transmission (Duplicated Transmission).

[0260] S21: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0261] Specifically, after the terminal knows the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, making full use of corresponding time-frequency resources.

[0262] Optionally, if the sub-channels of the terminal are multiple unit channels (for example, a channel with a unit of 20MHz), the terminal can send an ACK response or a BA response in the manner of repeated transmission on these multiple unit channels, or use a non- Send ACK response or BA response in repeated transmission mode.

[0263] In the method for indicating data transmission provided by the embodiment of the present invention, the OFDMA physical layer signaling sent by the access point is used to indicate to the terminal the subchannel for sending the ACK response or the BA response to the access point. That is, the access point assigns subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can make instructions for more terminals when sending ACK responses or BA responses to the access point, that is, to access The point is that the terminal indicates that the subchannel has no limit on the number of terminals; and the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, making full use of the corresponding time-frequency resources. Fig. 5 is a schematic flowchart of Embodiment 7 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point sends to the terminal multi-user multiple input multiple output (Multi User Multi Input Multi Output, hereinafter referred to as MU-MIMO) data information carrying OFDMA physical layer signaling, and the OFDMA physical layer signaling The OFDMA ACK request or OFDMA BA request is carried in the , so that the terminal responds with an ACK response or a BA response on the subchannel corresponding to the terminal in OFDMA mode. As shown in Figure 5, the method includes:

[0264] S501: The access point sends MU-MIMO data information to the terminal in MU-MIMO mode; wherein, the MU-MIMO data information carries OFDMA physical layer signaling.

[0265] Specifically, the OFDMA physical layer signaling carried in the above MU-MIMO data information includes an OFDMA ACK request or an OFDMA BA request, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode, that is, access Point to the terminal to request the terminal to obtain the corresponding MU-MIM0 data Reply ACK response or BA response after the message. The OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0266] S502: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0267] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0268] In the data transmission indication method provided by the embodiment of the present invention, the access point carries OFDMA physical layer signaling in the MU-MIMO data information sent to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal the transmission allocated for the terminal ACK response or BA response to the subchannel of the access point, so that each terminal can simultaneously send an ACK response or BA response to the access point on the corresponding subchannel, that is, through the access point according to OFDMA physical layer signaling for each The terminal allocates subchannels so that the access point can indicate more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates subchannels for the terminals and there is no limit to the number of terminals; and The ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, and corresponding time-frequency resources are fully utilized. FIG. 6 is a schematic flowchart of Embodiment 8 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point sends MU-MIMO data information carrying OFDMA physical layer signaling to the terminal, and sends an ACK request frame or a BA request frame to the terminal, so that the terminal uses OFDMA mode on the subchannel corresponding to the terminal The process of replying ACK response or BA response. As shown in Figure 6, the method includes:

[0269] S601: The access point sends MU-MIMO data information to the terminal in MU-MIMO mode; wherein, the MU-MIMO data information carries OFDMA physical layer signaling.

[0270] Specifically, the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0271] S602: The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK to the access point in OFDMA mode response or BA response. Specifically, the purpose of the ACK request frame or BA request frame sent by the access point to the terminal is that the access point requests the terminal to use the OFDMA mode to reply the ACK response or BA response to itself after the terminal obtains the corresponding MU-MIMO data information, To know whether the MU-MIM0 data information transmission is successful.

[0272] S603: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0273] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0274] In the data transmission indication method provided by the embodiment of the present invention, the access point carries OFDMA physical layer signaling in the MU-MIMO data information sent to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal the transmission allocated for the terminal ACK response or BA response to the subchannel of the access point, so that each terminal can simultaneously send an ACK response or BA response to the access point on the corresponding subchannel, that is, through the access point according to OFDMA physical layer signaling for each The terminal allocates subchannels so that the access point can indicate more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates subchannels for the terminals and there is no limit to the number of terminals; and The ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, and corresponding time-frequency resources are fully utilized. FIG. 7 is a schematic flowchart of Embodiment 9 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends an ACK request frame or a BA request frame carrying OFDMA physical layer signaling to the terminal, so that the terminal responds with an ACK response or a BA response on the subchannel corresponding to the terminal in OFDMA mode. As shown in Figure 7, the method includes:

[0275] S701: The access point sends MU-MIM0 data information to the terminal in MU-MIM0 mode.

[0276] S702: The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response to the access point in OFDMA mode or BA response; the ACK request frame or BA request frame carries OFDMA physical layer signaling.

[0277] Specifically, the purpose of the ACK request frame or BA request frame sent by the access point to the terminal is that the access point requests the terminal to use OFDMA mode to reply ACK after the terminal obtains the corresponding MU-MIMO data information The response or the BA responds to itself to know whether the transmission of the MU-MIM0 data information is successful. The OFDMA physical layer signaling carried in the ACK request frame or BA request frame is used to indicate to the terminal the subchannel allocated for the terminal to send the ACK response or BA response to the access point.

[0278] S703: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0279] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0280] In the data transmission indication method provided by the embodiment of the present invention, the access point carries OFDMA physical layer signaling in the ACK request frame or BA request frame sent to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal that the terminal allocates The subchannel for sending the ACK response or BA response to the access point, so that each terminal can simultaneously send the ACK response or BA response to the access point on the corresponding subchannel, SP, through the access point according to the OFDMA physical layer signaling as The method of allocating sub-channels for each terminal enables the access point to indicate for more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates sub-channels for the terminals and there is no limit to the number of terminals; In addition, the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, which makes full use of corresponding time-frequency resources.

[0281] FIG. 8 is a schematic flowchart of Embodiment 10 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends OFDMA physical layer signaling carrying an OFDMA ACK request or OFDMA BA request to the terminal, so that the terminal uses OFDMA mode to reply an ACK response or BA response on the subchannel corresponding to the terminal. As shown in Figure 8, the method includes:

[0282] S801: The access point sends an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal.

[0283] Specifically, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode, that is, the access point sends an ACK response or a BA response to the access point. The terminal requests to return an ACK response or a BA response to itself after the terminal obtains the corresponding OFDMA+MU-MIMO data information, so as to know whether the transmission of the following OFDMA+MU-MIMO data information is successful. The OFDMA physical layer signaling is used to indicate to the terminal the corresponding subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0284] S802: The access point uses the 0FDMA+MU-MIM0 mode to send a message to the terminal on the sub-channel corresponding to the terminal Send 0FDMA+MU-MIM0 data information.

[0285] Optionally, the OFDMA+MU-MIMO data information may carry the above OFDMA physical layer signaling, or may not carry the above OFDMA physical layer signaling.

[0286] S803: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0287] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it adopts the OFDMA or OFDMA+MU-MIMO mode (in this case, the access point needs to In addition to indicating the allocation of subchannels in the signaling, it is also necessary to further indicate the allocation of space-time streams of the MU-MIMO in each subchannel) Send an ACK response or a BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0288] In the data transmission indication method provided by the embodiment of the present invention, the access point sends OFDMA physical layer signaling to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal to send an ACK response or BA response assigned to the terminal to the access point sub-channels, so that each terminal can simultaneously send an ACK response or a BA response to the access point on the corresponding sub-channel, and the SP allocates sub-channels for each terminal by the access point according to OFDMA physical layer signaling, so that the access The point can indicate more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates that the number of sub-channels for the terminals is not limited to the number of terminals; and makes the ACK response or BA response of multiple terminals Parallel transmission to the access point makes full use of corresponding time-frequency resources.

[0289] FIG. 9 is a schematic flowchart of Embodiment 11 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends OFDMA physical layer signaling and an ACK request frame or BA request frame to the terminal, so that the terminal uses OFDMA mode to reply with an ACK response or BA response on the subchannel corresponding to the terminal. As shown in Figure 9, the method includes:

[0290] S901: The access point sends an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal.

[0291] Specifically, the OFDMA physical layer signaling is used to indicate to the terminal the corresponding subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0292] S902: The access point uses the 0FDMA+MU-MIM0 mode to send 0FDMA+MU-MIM0 data information to the terminal on the sub-channel corresponding to the terminal.

[0293] Optionally, the above OFDMA physical layer signaling may be carried in the OFDMA+MU-MIMO data information, It is also possible not to carry the above OFDMA physical layer signaling.

[0294] S903: the access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send an ACK response or The BA responds.

[0295] Optionally, the ACK request frame or BA request frame may carry the above OFDMA physical layer signaling, or may not carry the above OFDMA physical layer signaling. And optionally, when the above-mentioned OFDMA+MU-MIMO data information carries OFDMA physical layer signaling, the ACK request frame or BA request frame may not carry the above-mentioned OFDMA physical layer signaling; when the above-mentioned OFDMA+MU-MIMO data information If the OFDMA physical layer signaling is not carried in the ACK request frame or the BA request frame, the above OFDMA physical layer signaling may be carried.

[0296] S904: The access point receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0297] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it determines to use OFDMA or OFDMA+MU- MIMO mode sends ACK response or BA response to the access point on the corresponding sub-channel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0298] In the data transmission indication method provided by the embodiment of the present invention, the access point sends OFDMA physical layer signaling to the terminal, and the OFDMA physical layer signaling is used to indicate to the terminal to send an ACK response or BA response assigned to the terminal to the access point sub-channels, so that each terminal can simultaneously send an ACK response or a BA response to the access point on the corresponding sub-channel, and the SP allocates sub-channels for each terminal by the access point according to OFDMA physical layer signaling, so that the access The point can indicate more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates that the number of sub-channels for the terminals is not limited to the number of terminals; and makes the ACK response or BA response of multiple terminals Parallel transmission to the access point makes full use of corresponding time-frequency resources. FIG. 10 is a schematic flowchart of Embodiment 12 of the indication method for data transmission provided by the present invention. The method of this embodiment involves the transmission process of uplink OFDMA data information initiated by the terminal. This method specifically comprises the steps:

[0299] S1001: The access point receives the uplink transmission frame sent by the terminal. Specifically, the method involved in this embodiment is the uplink OFDMA data information transmission process initiated by the above STA, and the uplink transmission frame carries an OFDMA data transmission request.

[0300] The terminal can transmit an uplink transmission frame in OFDM mode, which can be of any type. The terminal may carry an OFDMA data transmission request in the uplink transmission frame, and the OFDMA data transmission request is used to request the access point to complete subsequent data transmission in OFDMA mode.

[0301] After receiving the uplink transmission frame of the terminal, the access point decides whether to switch to OFDMA mode transmission according to the OFDMA data transmission request of the terminal or the current network situation, for example, whether there is a demand from other terminals at the access point. If the access point judges that it is necessary to switch to the OFDMA mode, the OFDMA mode will be used in the next data transmission; if the access point judges that it does not switch to the OFDMA mode, the access point will continue to use the OFDM mode for data transmission.

[0302] S1002: The access point sends OFDMA physical layer signaling to the terminal.

[0303] Specifically, when the access point judges that it needs to switch to the OFDMA mode according to the OFDMA data transmission request or the current network situation, and uses the OFDMA mode for data transmission, the access point will send OFDMA physical layer signaling to the terminal, and the OFDMA physical layer signaling The command is used to instruct each terminal to send uplink OFDMA data information on its corresponding sub-channel.

[0304] It should be noted that the OFDMA physical layer signaling can be carried in the OFDM preamble in the above embodiment, or can be carried in the NDPA frame, and the OFDMA physical layer signaling can also be carried through cooperation between the NDPA frame and the OFDM preamble. For the specific process, reference may be made to the foregoing embodiments, and details are not repeated here. Optionally, take the OFDMA physical layer signaling carried in the OFDM preamble as an example (see the example in Figure 10a), the OFDM preamble can be transmitted only on the main channel, or can be transmitted on multiple sub-channels (including the main channel), See Figure 10b for an example.

[0305] Optionally, after S1002, the access point may also send the downlink OFDMA data information of the terminal on the sub-channels corresponding to each of the above-mentioned terminals. For the downlink OFDMA data transmission process, reference may be made to the above-mentioned embodiments, which will not be repeated here.

[0306] The terminal knows through the sub-channel indicated by the OFDMA physical layer signaling that it sends an uplink message to the access point.

[0307] The sub-channel of OFDMA data information, that is to say, avoids the signaling indication when the access point additionally instructs the terminal to transmit uplink OFDMA data information, and improves the efficiency of the system.

[0308] S1003: The access point receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0309] Specifically, when the terminal determines to send an uplink link to the access point according to the above OFDMA physical layer signaling After the subchannel of the OFDMA data information, the uplink OFDMA data information is sent to the access point on the subchannel.

[0310] Optionally, if after the above S1002, the access point also sends downlink OFDMA data information to the terminal, then when the terminal receives the downlink OFDMA data information sent by the access point on the corresponding subchannel and waits for a fixed duration, the terminal The uplink OFDMA data information associated with the terminal will be sent on the subchannel.

[0311] In the data transmission indication method provided by the embodiment of the present invention, the terminal sends an uplink transmission frame to the access point, so that the access point indicates for each terminal the subchannel when sending the uplink OFDMA data information through OFDMA physical layer signaling, so that Each terminal can send data to the access point on the corresponding sub-channel. SP, assigning subchannels to the terminal by sending OFDMA physical layer signaling through the access point, so that the access point can make instructions for more terminals when sending uplink OFDMA data information to the access point, avoiding additional The signaling indication when instructing the terminal to transmit the uplink OFDMA data information improves the efficiency of the system.

[0312] Further, the method involved in this embodiment is aimed at the scenario where the terminal sends uplink OFDMA data information to the access point as shown in FIG. 10 above. After the access point receives the uplink OFDMA data information sent by the terminal, it The process of sending an ACK response or a BA response to the terminal on a subchannel. Further, after the above S1003, the method also includes:

[0313] S1004: The access point uses the OFDMA mode to send an ACK response or a BA response corresponding to the uplink OFDMA data information on the subchannel corresponding to the terminal.

[0314] Specifically, the terminal sends uplink OFDMA data information to the access point on its corresponding subchannel, the uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to indicate that the access point The access point sends an ACK response or a BA response to the terminal in OFDMA mode, that is, the access point feeds back the transmission status of uplink OFDMA data information to the terminal.

[0315] Since the access point itself is the subject of sending OFDMA physical layer signaling, the access point can directly send the ACK response or BA response of the uplink OFDMA data information associated with the terminal to the terminal on the corresponding subchannel, thereby The terminal is made to know whether the uplink OFDMA data transmission is successful.

[0316] It should be noted that the frame format and indication method of the above-mentioned embodiments 1 to 3 are also applicable to the data transmitted by the access point to uplink multi-users (uplink OFDMA data information or uplink MU-MIM0 data information), using the OFDMA mode Reply ACK or BA response to each terminal in parallel. The data transmission indication method provided by the embodiment of the present invention enables the access point to send the above-mentioned uplink OFDMA to the terminal on the corresponding subchannel by carrying an ACK request or a BA request in the uplink OFDMA data information sent by the terminal to the access point ACK response or BA response corresponding to the data information. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when sending uplink OFDMA data to the access point, that is, the access point is The number of sub-channels indicated by the terminal is not limited to the number of terminals; and enables the terminal to know whether the uplink OFDMA data transmission is successful or not according to the ACK response or BA response sent by the access point.

[0317] FIG. 11 is a schematic flowchart of Embodiment 13 of the indication method for data transmission provided by the present invention. The method of this embodiment involves the transmission process of uplink OFDMA data information initiated by the access point. This method specifically comprises the steps:

[0318] S1101: The access point sends OFDMA physical layer signaling to the terminal.

[0319] Specifically, the OFDMA physical layer signaling can be carried in the OFDM preamble in the above embodiment, or can be carried in the NDPA frame, and the OFDMA physical layer signaling can also be carried through cooperation between the NDPA frame and the OFDM preamble. For the specific process, reference may be made to the foregoing embodiments, and details are not repeated here.

[0320] The OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for sending uplink OFDMA data information to the access point. Optionally, in all embodiments of the present invention, the OFDMA physical layer signaling may include an information bit, which is used to indicate to the terminal whether the allocation of the subchannel is for uplink, or only for downlink, or for Up and down bidirectional. In this embodiment, the information bit in the OFDMA physical layer signaling indicates to the terminal the subchannel that the subchannel is used for uplink transmission. When the access point obtains the right to use the channel, the issued OFDMA physical layer signaling instructs the terminal to send uplink OFDMA data information to the access point on the corresponding sub-channel. Taking the OFDMA physical layer signaling carried in the OFDM preamble as an example, the OFDM part can be transmitted on multiple sub-channels (see 11a), or can only be transmitted on the main channel (see lib).

[0321] S1 102: The access point receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0322] Specifically, after the terminal determines the subchannel for sending uplink OFDMA data information to the access point according to the above OFDMA physical layer signaling, it sends uplink OFDMA data information to the access point on the subchannel, and then the access point can receive The plurality of uplink OFDMA data information sent by each terminal on the corresponding sub-channel fully utilizes the corresponding time-frequency resources.

[0323] In the data transmission indication method provided by the embodiment of the present invention, the access point uses the OFDMA physical layer The signaling indicates the sub-channel for the terminal to send uplink OFDMA data information, so that each terminal can send uplink data to the access point on the corresponding sub-channel, making full use of the corresponding time-frequency resources. In addition, subchannels are assigned to each terminal by means of the access point sending OFDMA physical layer signaling, so that the access point can provide instructions for more terminals when sending uplink OFDMA data to the access point, that is, the access point is a terminal Indicating sub-channels does not limit the number of terminals. FIG. 12 is a schematic flowchart of Embodiment 14 of the data transmission indication method provided by the present invention. As shown in FIG. 12, the method includes:

[0324] S1201: The terminal receives the OFDMA physical layer signaling sent by the access point, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannels allocated by the access point to the terminal; wherein, the OFDMA physical layer signaling includes the identifier of the terminal and Subchannel information corresponding to the identity of the terminal.

[0325] Specifically, the terminal receives the OFDMA physical layer signaling sent by the access point in OFDM mode. The OFDM mode here means that the access point can send the OFDMA physical layer signaling to a certain terminal within its coverage, but the access point Other terminals within the coverage of the access point can also monitor and correctly demodulate the OFDMA physical layer signaling. The OFDMA physical layer signaling in the embodiment of the present invention includes a terminal identifier and subchannel information corresponding to the terminal identifier.

[0326] The present invention does not limit the channel bandwidth of the sub-channel, and the access point determines the bandwidth of the sub-channel according to the bandwidth requirement of the terminal. Moreover, the indicated subchannel can be presented in various forms, which can be the center frequency and bandwidth of the subchannel, or the channel number and bandwidth of the starting frequency band, or the range of channel numbers from the starting frequency band to the ending frequency band, etc. , the present invention is not limited.

[0327] S1202: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling.

[0328] Specifically, each terminal can determine its corresponding subchannel according to the content contained in the above OFDMA physical layer signaling, and perform corresponding operations on the corresponding subchannel; for example, it can receive and receive on its corresponding subchannel The part of the data sent by the access point may also send corresponding response information or uplink data information to the access point on its corresponding sub-channel. The identifier of the terminal in the above OFDMA physical layer signaling may be an identifier of a single terminal, or an identifier of a terminal group, and the terminal group may include multiple terminals.

[0329] The OFDMA physical layer signaling involved in this embodiment is a subchannel indicated by a terminal, and may correspond to one terminal or may correspond to multiple terminals. For example: multiple terminals can be divided into a group, and the OFDMA physical layer signaling allocates a subchannel to this group, then all terminals in this group can use Use this subchannel.

[0330] The format of the signaling part in the prior art can only support a bandwidth of 20MHz, and is for 48 subcarriers, and users are assigned to each subcarrier. When a bandwidth greater than 20MHz is used, there is no corresponding extension scheme to support it in the prior art; However, the OFDMA physical layer signaling in the embodiment of the present invention can support a larger bandwidth, and for the number of terminals, multiple terminals are allocated to indicate the allocated subchannel, and the subchannel includes one or more subcarriers . Therefore, the subject of the embodiment of the present invention is different from that of the prior art (the prior art assigns users to subcarriers, while the embodiment of the present invention assigns subchannels or subcarriers to users), and the prior art only Instructions can be made for 48 terminals, while OFDMA physical layer signaling indicates that subchannels for terminals are not limited by bandwidth, and subchannels can be allocated for more terminals (more than 48 users) within a larger bandwidth. Of course, in this embodiment of the present invention, subchannels can still be allocated to less than 48 terminals.

[0331] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the OFDMA physical layer signaling sent by the access point, determines its corresponding subchannel, and performs corresponding operations on the corresponding subchannel. That is, the access point assigns subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can indicate subchannels for more terminals, that is, the number of terminals indicated by the access point for the terminal does not affect the number of terminals. limit. FIG. 13 is a schematic flowchart of Embodiment 15 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a feasible implementation manner of indicating a subchannel for a terminal through OFDMA physical layer signaling. Further, on the basis of the embodiment shown in FIG. 12 above, the identifier of the terminal may be the identifier of one or more terminal groups, each terminal group includes at least one terminal, and the subchannel information includes an uplink subchannel or Downlink sub-channel or uplink and downlink bidirectional sub-channel. The method includes: S1301: The terminal receives the mapping relationship between the identifier of the terminal group and the address of the terminal sent by the access point. Specifically, the terminal needs to know which terminal group it belongs to, and then it can know its corresponding subchannel when the access point allocates subchannels for the terminal group. Therefore, the access point needs to send the mapping relationship between the identifier of the terminal group and the address of the terminal to each terminal, so that each terminal knows the terminal group it is in. Wherein, a method of simply notifying the terminals of the mapping relationship between the identifier of the terminal group and the address of each terminal in the form of a group management frame can refer to the format and related descriptions in the above Table 1, and the embodiments of the present invention will not be repeated here.

[0332] S1302: The terminal receives the OFDMA physical layer signaling sent by the access point; wherein, the OFDMA physical layer signaling The layer signaling includes the identification of the terminal and the subchannel information corresponding to the identification of the terminal. The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel. .

[0333] Optionally, the OFDMA physical layer signaling may indicate through a dedicated indication bit that the subchannel allocated to the terminal is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel. That is to say, the above OFDMA physical layer signaling can not only indicate the allocated subchannels for the terminal group, but also indicate to the terminal group that the allocated subchannels are uplink subchannels or downlink subchannels or uplink and downlink bidirectional subchannels.

[0334] Specifically, the above terminal identifier is an identifier of one or more terminal groups, and the OFDMA physical layer signaling is used to indicate to one or more terminal groups the subchannel information allocated for each terminal group; wherein, the terminal group and the subchannel One to one correspondence.

[0335] For the relevant fields contained in the above OFDMA physical layer signaling indication, refer to the formats shown in Table 2 and Table 3 and related descriptions, and the embodiments of the present invention will not be repeated here.

[0336] S1303: The terminal judges that it is located in the above-mentioned terminal group according to the above-mentioned mapping relationship, and then the terminal determines the sub-channel corresponding to the terminal group as the sub-channel corresponding to the terminal.

[0337] In the data transmission indication method provided by the embodiment of the present invention, the access point sends to the terminal OFDMA physical layer signaling that carries the identification of the terminal and the subchannel information corresponding to the identification of the terminal, and the access point also sends to each terminal The mapping relationship between the identification of the terminal group and the addresses of each terminal is sent, so that each of the above-mentioned terminals knows the terminal group it is in, and further knows its corresponding sub-channel, so as to perform corresponding operations on the sub-channel. SP, the access point assigns subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can indicate subchannels for more terminals, that is, the access point indicates the number of subchannels to the terminals for the terminals and no limit. Embodiment 16 of the present invention provides a method for indicating data transmission, and the method involved in this embodiment is another feasible implementation manner in which an access point indicates a subchannel for a terminal through OFDMA physical layer signaling. On the basis of the embodiment shown in FIG. 12 above, the OFDMA physical layer signaling may include a terminal identifier and subchannel information corresponding to the terminal identifier, and the terminal identifier is an identifier of a separate terminal group, and the terminal group At least two terminals are included, and the OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel. Optionally, the OFDMA physical layer signaling can use a dedicated indicator bit to indicate that the subchannel allocated to the terminal is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; each terminal in the terminal group corresponds to the subchannel one by one . That is to say, the above OFDMA physical layer signaling can not only indicate the allocated subchannels for each terminal in the terminal group, but also can indicate to the terminal that the allocated subchannels are uplink subchannels or downlink subchannels or uplink and downlink bidirectional subchannels.

[0338] Specifically, the relevant fields included in the above OFDMA physical layer signaling indication can refer to the format and related descriptions shown in the above Table 4, and the embodiments of the present invention will not be repeated here.

[0339] Each terminal in the terminal group in Table 4 corresponds to a different subchannel, and since the OFDMA physical layer signaling can support a larger bandwidth (not limited by the 20MHz bandwidth), it can indicate subchannels for more terminals.

[0340] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the data transmission sent by the access point

[0341] OFDMA physical layer signaling, knowing which subchannel it corresponds to according to the OFDMA physical layer signaling, so that the terminal can perform corresponding operations on its corresponding subchannel. That is, the access point assigns subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can indicate subchannels for more terminals, that is, the number of terminals indicated by the access point for the terminal does not affect the number of terminals. limit. FIG. 14 is a schematic flowchart of Embodiment 17 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the terminal receives the OFDMA physical layer signaling carried in the OFDM preamble, and obtains its corresponding subchannel according to the OFDMA physical layer signaling, and receives the signal sent by the access point on the corresponding subchannel. The process of downlink OFDMA data information. The method includes:

[0342] S1401: The terminal receives the OFDM preamble sent by the access point; wherein, the OFDM preamble carries OFDMA physical layer signaling.

[0343] S1402: The terminal determines its corresponding subchannel according to the above OFDMA physical layer signaling.

[0344] Specifically, the terminal receives the OFDM preamble sent by the access point in OFDM mode. The OFDM mode here means that the access point sends an OFDM preamble to any terminal within its coverage. Wherein, the OFDM preamble includes STF, LTF, L-SIG, and UHT-SIG-A, and the UHT-SIG-A carries OFDMA physical layer signaling. It should be noted that the above-mentioned access point using the OFDM mode to send the OFDM preamble means that the access point sends the OFDM preamble to a terminal, but at this time the access point does not know which specific terminal it is sent to, so the access point sends the OFDM preamble to a terminal. Any terminal sends an OFDM preamble, and all active terminals will monitor and receive it, and then obtain OFDMA physical layer signaling, so as to know their corresponding channels. It should be noted that, for the content included in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the foregoing Embodiment 14 to Embodiment 16, and details are not repeated in this embodiment of the present invention.

[0345] S1403: The terminal receives the downlink OFDMA data information sent by the above-mentioned access point on the corresponding subchannel; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover field and UHT-SIG_B.

[0346] Specifically, the above-mentioned access point uses the OFDMA mode to send downlink OFDMA data information on the sub-channel corresponding to the terminal, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the sub-channel corresponding to the terminal, thereby saving signaling overhead and bring the gain of multi-user diversity. In addition, the sub-channel corresponding to the terminal may also include a main channel of the BSS, which is used for interactive control and management signaling between the access point and the terminal; that is, the access point sends the OFDMA physical layer signal on the main channel After the command, the main channel can be released; and the downlink OFDMA data information can also be sent to the terminal through the main channel and other sub-channels together.

[0347] For the data transmission frame format of the above-mentioned OFDM preamble and downlink OFDMA data information, refer to the format shown in the above-mentioned Table 5 and related descriptions, and the embodiments of the present invention will not be repeated here.

[0348] In addition, since the access point allocates subchannels for the terminal group, it actually allocates subchannels for each terminal, but the data sent by the access point each time is sent for a specific terminal in the terminal group. Therefore, the terminal You need to know your actual terminal address in the terminal group. Therefore, the UHT-SIG-B or media access control (Media Access Control, hereinafter referred to as MAC) layer header transmitted by the access point in each sub-channel also needs to carry a specific destination terminal address. The destination terminal address is the above table 1 To the element address in the terminal group indicated by the group number in Table 4, the terminal reads the destination terminal address in the UHT-SIG-B or MAC layer header.

[0349] Correspondingly, after judging the received OFDM preamble in the OFDM mode, the terminal reads the OFDMA physical layer signaling of UHT_SIG_A, and judges whether it is in the terminal group indicated by the OFDMA physical layer signaling according to its own address. If it is in the terminal group, switch to the OFDMA mode, and further switch to the indicated subchannel according to the subchannel information corresponding to the terminal group, and further receive the OFDMA preamble, and according to the received UHT-SIG-B or The destination terminal address carried in the header of the MAC layer judges whether it is the destination terminal: if yes, read the subsequent OFDMA data; if not, stop reading. If it is judged that the terminal is not in the terminal group, the terminal may choose not to switch to the OFDMA mode, and continue to use the OFDM method to obtain the OFDMA preamble and OFDMA data.

[0350] In the above steps, the terminal can read the data frame format (that is, the packet (including OFDM preamble, OFDMA preamble and OFDMA data) to determine the time required for this transmission. Wherein, the non-destination terminal sets its own network allocation vector (Network Allocation Vector, hereinafter referred to as NAV) according to the duration. Within the time length of the NAV, the non-destination terminal may choose not to monitor the subchannel to save its own power consumption. In addition, the non-destination terminal can also set the NAV according to the length of the L-SIG, where the length can indicate the total length of multiple data frames, and is used for the time taken by the terminal to calculate the total length.

[0351] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the OFDM preamble carrying the OFDMA physical layer signaling, and obtains the OFDMDA physical layer signaling from the OFDM preamble, so as to know that it should be in the OFDMA physical layer signaling according to the OFDMA physical layer signaling. Which sub-channel receives the downlink OFDMA data information corresponding to itself. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when receiving data from the access point, that is, the access point is a terminal indicator Channels are not limited to the number of terminals. FIG. 15 is a schematic flowchart of Embodiment 18 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is to use the terminal to obtain the OFDMA physical layer signaling carried in the NDPA frame, and to know its corresponding subchannel according to the OFDMA physical layer signaling, and to receive the information sent by the access point on the corresponding subchannel. The process of downlink OFDMA data information. The method includes:

[0352] S1501: The terminal receives the NDPA frame sent by the access point; wherein, the NDPA frame carries OFDMA physical layer signaling.

[0353] Specifically, the embodiment of the present invention adopts a dedicated NDPA frame to carry OFDMA physical layer signaling, so as to reduce overhead caused when transmitting OFDMA physical layer signaling. The format of the NDPA frame in the embodiment of the present invention can refer to the above Table 6, and the embodiment of the present invention will not be repeated here.

[0354] It should be noted that the access point can use the OFDM mode to send an NDPA frame to a certain terminal within its coverage area, either on the main channel or on multiple sub-channels, and other terminals can monitor the NDPA frame. frame. After that, the access point also needs to use the OFDM mode to send the OFDM preamble. The above OFDMA physical layer signaling can be carried in the NDPA frame, and can also be carried in the NDPA frame and the OFDM preamble at the same time, but in order to save signaling overhead, it is generally only carried in the NDPA frame. Optionally, when the NDPA frame carries OFDMA physical layer signaling, the OFDM preamble may further indicate a specific terminal identifier in the terminal group.

[0355] S1502: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. It should be noted that, for the content contained in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in Embodiment 14 to Embodiment 16 above, and the embodiments of the present invention will not be repeated here.

[0356] S1503: The terminal receives the downlink OFDMA data information sent by the access point on the corresponding subchannel; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover field and UHT-SIG_B.

[0357] Specifically, the access point uses the OFDMA mode to send downlink OFDMA data information, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the sub-channels corresponding to each terminal, and then can make full use of corresponding time-frequency resources. In addition, the sub-channel corresponding to the terminal may also include the main channel of the BSS, which is used for interactive control and management signaling between the access point and the terminal; that is, the access point sends the OFDMA physical layer After the signaling, the main channel may be released, or downlink OFDMA data information may be sent to the terminal through the main channel together with other sub-channels.

[0358] When the terminal is in an idle state, the OFDM method is used to detect and receive the NDPA frame, and the OFDMA physical layer signaling is read according to the OFDM method; after that, the terminal also uses the OFDM method to receive the OFDM preamble; the OFDM preamble and the data transmission frame format of the downlink OFDMA data information can be Refer to the formats and related descriptions shown in Table 5 above, and details will not be repeated here in this embodiment of the present invention.

[0359] In addition, since the access point allocates subchannels for the terminal group, it actually allocates subchannels for each terminal, but the data sent by the access point each time is sent for a specific terminal in the terminal group. Therefore, the terminal You need to know your actual terminal address in the terminal group. Therefore, the UHT-SIG-B or MAC layer header transmitted by the access point in each sub-channel also needs to carry a specific destination terminal address. The destination terminal address is the terminal group indicated by the group numbers in Tables 1 to 4 above. The terminal reads the destination terminal address in the UHT-SIG-B or MAC layer header.

[0360] Correspondingly, after judging the received OFDM preamble in the OFDM mode, the terminal judges whether it is in the terminal group indicated by the OFDMA physical layer signaling according to its own address. If it is in the terminal group, switch to the OFDMA mode, and further switch to the indicated subchannel according to the subchannel information corresponding to the terminal group, and further receive the OFDMA preamble, and according to the received UHT-SIG-B or The destination terminal address carried in the header of the MAC layer judges whether it is the destination terminal: if yes, read the subsequent OFDMA data; if not, stop reading. If it is judged that the terminal is not in the terminal group, the terminal can choose not to switch to the OFDMA mode, and continue to use the OFDM method to obtain the OFDMA preamble and OFDMA data. In the above steps, whether the terminal is the destination terminal or not, the duration in the data frame format (that is, including OFDM preamble, OFDMA preamble and OFDMA data) can be read to determine the time required for this transmission. Wherein, the non-destination terminal sets its own NAV according to the duration. During the time length of the NAV, the non-target terminal may choose not to monitor the sub-channel to save its own power consumption. In addition, the non-destination terminal can also set the NAV according to the length of the L-SIG, where the length can indicate the total length of multiple data frames, and is used for the time taken by the terminal to calculate the total length.

[0361] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the NDPA frame carrying the OFDMA physical layer signaling sent by the access point, so that the terminal can obtain the OFDMA physical layer signaling from the NDPA frame, so that according to the OFDMA The physical layer signaling knows on which sub-channel it should receive the downlink OFDMA data information corresponding to itself, so as to receive the downlink OFDMA data information sent by the access point on the corresponding sub-channel. That is, the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can indicate more terminals when receiving data from the access point, that is, the access point is a terminal indicator Channels are not limited to the number of terminals. Fig. 16 is a schematic flowchart of Embodiment 19 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point separately carries the content contained in the OFDMA physical layer signaling in the NDPA frame and the OFDM preamble and sends it to the terminal, so that the terminal obtains the OFDMA physical layer signaling from the NDPA frame and the OFDM preamble , so as to obtain the subchannel corresponding to itself according to the OFDMA physical layer signaling, and receive the downlink OFDMA data information sent by the access point on the corresponding subchannel. The method includes:

[0362] S1601: The terminal receives the NDPA frame and the OFDM preamble sent by the access point.

[0363] Specifically, the NDPA frame and the OFDM preamble can carry OFDMA physical layer signaling in two ways, which are:

[0364] The first type: the terminal receives the NDPA frame and the OFDM preamble sent by the access point; wherein, the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling described above, and the OFDM preamble carries the information related to the terminal in the OFDMA physical layer signaling described above. Identify the corresponding sub-channel information. The identifier of the terminal here may be the identifier of one or more terminal groups in Embodiment 2, and the subchannel corresponds to the terminal group one by one; it may also be the identifier of a single terminal group in Embodiment 3, and the subchannel corresponds to the terminal group. There is a one-to-one correspondence between each terminal in the group.

[0365] The second type: the terminal receives the NDPA frame and the OFDM preamble sent by the access point; wherein, the NDPA frame carrying the subchannel information corresponding to the identifier of the terminal in the above OFDMA physical layer signaling, and the OFDM preamble carries the identifier of the terminal in the above OFDMA physical layer signaling. The identifier of the terminal here may be the identifier of one or more terminal groups in Embodiment 2, and the subchannel corresponds to the terminal group one by one; it may also be the identifier of a single terminal group in Embodiment 3, and the subchannel corresponds to the terminal group. There is a one-to-one correspondence between each terminal in the group.

[0366] That is to say, the above-mentioned NDPA frame and the OFDM preamble can cooperate with each other to indicate the above-mentioned OFDMA physical layer signaling. The user group information field in the above Table 5 may include the identifier of the terminal, and may also include subchannel information corresponding to the identifier of the terminal. In addition, the control information field in Table 5 may also indicate the effective time length of the subchannel information of the currently indicated terminal or terminal group, so that the terminal can judge whether the subchannel information indication of the terminal or terminal group is valid or not according to the time length. expired, if not expired, the terminal can continue to use the current sub-channel to receive and send data.

[0367] If only the identification of the terminal is carried in the NDPA frame, the OFDM preamble also needs to carry the subchannel information corresponding to the identification of the terminal in the NDPA frame; if only the subchannel information is carried in the NDPA frame, the OFDM preamble also needs to carry the The identifier of the terminal corresponding to the subchannel information in the NDPA frame.

[0368] S1602: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling.

[0369] It should be noted that, for the content contained in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in Embodiment 14 to Embodiment 16 above, and the embodiments of the present invention will not be repeated here.

[0370] S1603: The terminal receives the downlink OFDMA data information sent by the access point on the corresponding subchannel; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover field and UHT-SIG_B.

[0371] Specifically, the access point uses the OFDMA mode to send downlink OFDMA data information, that is, the access point can simultaneously send downlink OFDMA data information to multiple terminals on the sub-channels corresponding to each terminal, and then can make full use of corresponding time-frequency resources. In addition, the sub-channel corresponding to the terminal may also include the main channel of the BSS, which is used for interactive control and management signaling between the access point and the terminal; that is, the access point sends the OFDMA physical layer After the signaling, the main channel may be released, or downlink OFDMA data information may be sent to the terminal through the main channel together with other sub-channels.

[0372] When the terminal is in an idle state, it uses OFDM to detect and receive NDPA frames, and reads a part of the OFDMA physical layer signaling carried in the NDPA frame; after that, the terminal also uses OFDM mode to receive the OFDM preamble, and then reads the information about the OFDMA physical layer in the OFDM preamble. The content of that part supplemented by signaling. For the data transmission frame format of the above-mentioned OFDM preamble and downlink OFDMA data information, refer to the format shown in the above-mentioned Table 5 and related descriptions, and the embodiments of the present invention will not be repeated here.

[0373] In addition, since the access point allocates subchannels for the terminal group, it actually allocates subchannels for each terminal, but the data sent by the access point each time is sent for a specific terminal in the terminal group. Therefore, the terminal You need to know your actual terminal address in the terminal group. Therefore, the UHT-SIG-B or MAC layer header transmitted by the access point in each sub-channel also needs to carry a specific destination terminal address. The destination terminal address is an element address in the terminal group indicated by the group number. The terminal Read the destination terminal address in the UHT-SIG-B or MAC layer header.

[0374] Correspondingly, after judging the received OFDM preamble in the OFDM mode, the terminal judges whether it is in the terminal group indicated by the OFDMA physical layer signaling according to its own address. If it is in the terminal group, switch to the OFDMA mode, and further switch to the indicated subchannel according to the subchannel information corresponding to the terminal group, and further receive the OFDMA preamble, and according to the received UHT-SIG-B or The destination terminal address carried in the header of the MAC layer judges whether it is the destination terminal: if yes, read the subsequent OFDMA data; if not, stop reading. If it is judged that the terminal is not in the terminal group, the terminal can choose not to switch to the OFDMA mode, and continue to use the OFDM mode to obtain the OFDMA preamble and OFDMA data.

[0375] In the above steps, whether the terminal is the destination terminal or not, the duration in the data frame format (that is, including OFDM preamble, OFDMA preamble and OFDMA data) can be read to determine the time required for this transmission. Wherein, the non-destination terminal sets its own NAV according to the duration. During the time length of the NAV, the non-target terminal may choose not to monitor the sub-channel to save its own power consumption. In addition, the non-destination terminal can also set the NAV according to the length of the L-SIG, where the length can indicate the total length of multiple data frames, and is used for the time taken by the terminal to calculate the total length.

[0376] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the NDPA frame and OFDM preamble carrying OFDMA physical layer signaling sent by the access point, and learns that it should On which sub-channel is received the downlink OFDMA data information corresponding to itself, so as to receive the downlink OFDMA data information sent by the access point. SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when receiving data from the access point, that is, the access point is the terminal indicator Channels are not limited to the number of terminals. Further, on the basis of the above-mentioned embodiments shown in FIG. 14 to FIG. 16, as a feasible implementation manner of the embodiment of the present invention, the method involved in this implementation is to receive the downlink OFDMA data information sent by the access point at the terminal Afterwards, the process of sending an ACK response or a BA response to the access point on the corresponding sub-channel. Optionally, the foregoing OFDMA physical layer signaling or OFDMA data carries an OFDMA ACK request or OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response to the access point in OFDMA mode or a BA response; then the above OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point. That is, after the above S1403 or S1503 or S1603, the following actions of S20 can be performed:

[0377] S30: The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0378] Specifically, in order to indicate that the downlink OFDMA data information sent by the access point is correctly received by each terminal, each terminal must reply an ACK response or a BA response to the access point. If the access point carries an OFDMA ACK request or OFDMA BA request in the downlink OFDMA data information or OFDMA physical layer signaling, the terminal receives the downlink OFDMA data on its corresponding subchannel according to the OFDMA physical layer signaling instruction of the access point After the information is sent, the subchannel indicated by the OFDMA physical layer signaling can directly reply with an ACK or BA response in the form of OFDMA. Wherein, the ACK response corresponds to the OFDMA ACK request, and the BA response corresponds to the OFDMA BA request. Afterwards, the access point receives the ACK response or BA response sent by each terminal on the corresponding sub-channel. That is to say, multiple terminals can simultaneously send responses to the access point on their corresponding sub-channels, making full use of corresponding time-frequency resources.

[0379] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the downlink OFDMA data information sent by the access point on the subchannel indicated by the OFDMA physical layer signaling, and multiple terminals can send the data information to the access point on the corresponding subchannel Simultaneously send ACK response or BA response, SP, through the way that the access point assigns subchannels to each terminal according to OFDMA physical layer signaling, so that the access point can send ACK response or BA response to the access point for more terminals Instructions are made when the access point indicates subchannels for the terminal, and there is no limit to the number of terminals; and the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, making full use of the corresponding time-frequency resources. Further, on the basis of the above embodiments shown in FIG. 14 to FIG. 16, as another feasible implementation manner of the embodiment of the present invention, the method involved in this embodiment is that the terminal receives the access point After sending the OFDMA physical layer signaling and downlink OFDMA data information, receive a separate ACK request frame or BA request frame sent by the access point, so that the terminal can send to the access point on the subchannel indicated by the OFDMA physical layer signaling The process of ACK response or BA response. The foregoing OFDMA physical layer signaling may also be used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or BA response to the access point. After the above S202 or S302 or S402, the following steps can be performed:

[0380] S40: The terminal receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send Point sends ACK response or BA response

[0381] Specifically, after the access point sends downlink OFDMA data information to the terminal, it may also send a separate ACK request frame or BA request frame to the terminal (see FIG. 4b, taking a separate BA request frame as an example), the ACK request frame or The BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Optionally, the ACK request frame or BA request frame may carry the above-mentioned OFDMA physical layer signaling, or may not carry the above-mentioned OFDMA physical layer signaling. The terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling.

[0382] The expression form of the dedicated information bit may be to identify the ACK request frame or BA request frame as a frame type used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode (that is, different from the existing new frame type of ACK request frame or BA request frame). Another form of expression of the dedicated information bit can also be, without changing the frame type of the ACK request frame or the BA request frame, directly using the dedicated information bit to instruct the terminal to use the OFDMA mode to send an ACK response to the access point or BA response.

[0383] In addition, similar to the aforementioned OFDM preamble, the ACK request frame or the BA request frame can be sent only on the main channel, or can be sent on all sub-channels in a manner of repeated transmission (Duplicated Transmission).

[0384] S21: The terminal sends an ACK response or a BA response to the access point on the corresponding subchannel in OFDMA mode.

[0385] Specifically, after the terminal knows the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can report to the receiving terminal on its corresponding sub-channel The entry point sends the ACK response or BA response at the same time, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, making full use of corresponding time-frequency resources.

[0386] Optionally, if the sub-channels of the terminal are multiple unit channels (for example, a channel with a unit of 20MHz), the terminal may send an ACK response or a BA response in the manner of repeated transmission on these multiple unit channels, or may use a non- Send ACK response or BA response in repeated transmission mode.

[0387] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the OFDMA physical layer signaling sent by the access point, and determines the subchannel for sending the ACK response or BA response to the access point according to the OFDM physical layer signaling. SP, through the way that the access point allocates subchannels to each terminal according to OFDMA physical layer signaling, the access point can make instructions for more terminals when sending ACK responses or BA responses to the access point, that is, the access point Indicating sub-channels for the terminal does not limit the number of terminals; and the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, fully utilizing the corresponding time-frequency resources. FIG. 17 is a schematic flowchart of Embodiment 20 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point sends MU-MIMO data information carrying OFDMA physical layer signaling to the terminal, and carries OFDMA ACK request or OFDMA BA request in the OFDMA physical layer signaling, so that the terminal uses OFDMA mode to transmit The process of replying an ACK response or a BA response on the corresponding sub-channel. As shown in Figure 17, the method includes:

[0388] S1701: The terminal receives the MU-MIM0 data information sent by the access point; wherein, the MU-MIM0 data information carries OFDMA physical layer signaling;

[0389] Specifically, the OFDMA physical layer signaling carried in the above MU-MIMO data information also includes an OFDMA ACK request or an OFDMA BA request, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode, that is, to receive The entry point requests the terminal to return an ACK response or a BA response after the terminal obtains the corresponding MU-MIM0 data information. The OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0390] S1702: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. It should be noted that, for the content included in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the foregoing Embodiment 14 to Embodiment 16, and details are not repeated in this embodiment of the present invention.

[0391] S1703: The terminal uses the OFDMA mode to send an ACK response or a BA response to the access point on the corresponding subchannel. Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0392] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the MU-MIMO data information carrying OFDMA physical layer signaling sent by the access point, and determines that the terminal sends an ACK response or BA response to the access point according to the OFDMA physical layer signaling. The subchannel of the point, so that each terminal can send an ACK response or BA response to the access point at the same time on the corresponding subchannel, SP, through the way that the access point allocates subchannels for each terminal according to the OFDMA physical layer signaling, so that the access point The access point can indicate for more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates that the number of sub-channels for the terminals is not limited to the number of terminals; and makes the ACK response or BA response of multiple terminals Responses are transmitted to the access point in parallel, making full use of corresponding time-frequency resources. Fig. 18 is a schematic flowchart of Embodiment 21 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is that the access point sends MU-MIMO data information carrying OFDMA physical layer signaling to the terminal, and an ACK request frame or a BA request frame, so that the terminal uses OFDMA mode to reply ACK on the subchannel corresponding to the terminal The process of responding or BA responding. As shown in Figure 18, the method includes:

[0393] S1801: The terminal receives the MU-MIMO data information sent by the access point; wherein, the MU-MIMO data information carries OFDMA physical layer signaling.

[0394] Specifically, the OFDMA physical layer signaling is used to indicate to the terminal the subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0395] S1802: The terminal receives the ACK request frame or the BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK request frame to the access point in OFDMA mode. ACK response or BA response.

[0396] Specifically, the terminal receives the ACK request frame or BA request frame sent by the access point, that is, the access point requests the terminal to reply the ACK response or BA response to itself in OFDMA mode after obtaining the corresponding MU-MIMO data information, so as to Know whether the transmission of MU-MIM0 data information is successful.

[0397] S1803: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. It should be noted that, for the content included in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the foregoing Embodiment 14 to Embodiment 16, and details are not repeated in this embodiment of the present invention.

[0398] S1804: The terminal sends an ACK response or a BA response to the access point on the corresponding subchannel in OFDMA mode.

[0399] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0400] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the MU-MIMO data information carrying OFDMA physical layer signaling sent by the access point, and determines to send an ACK response or BA response to the access point according to the OFDMA physical layer signaling sub-channels, so that each terminal can simultaneously send an ACK response or a BA response to the access point on the corresponding sub-channel, and the SP allocates sub-channels for each terminal by the access point according to OFDMA physical layer signaling, so that the access The point can indicate more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates that the number of sub-channels for the terminals is not limited to the number of terminals; and makes the ACK response or BA response of multiple terminals Parallel transmission to the access point makes full use of corresponding time-frequency resources.

[0401] FIG. 19 is a schematic flowchart of Embodiment 22 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends an ACK request frame or a BA request frame carrying OFDMA physical layer signaling to the terminal, so that the terminal uses OFDMA mode to reply an ACK response or a BA response on the subchannel corresponding to the terminal. As shown in Figure 19, the method includes:

[0402] S1901: The terminal receives the MU-MIM0 data information sent by the access point.

[0403] S1902: The terminal receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK to the access point in OFDMA mode Response or BA response; the ACK request frame or BA request frame carries OFDMA physical layer signaling.

[0404] Specifically, the purpose of the ACK request frame or BA request frame sent by the access point to the terminal is to request the terminal to reply an ACK response or BA response to itself after the terminal obtains the corresponding MU-MIMO data information, so as to know the MU -Whether the transmission of MIM0 data information is successful. The OFDMA physical layer signaling carried in the ACK request frame or BA request frame is used to indicate to the terminal that the terminal is assigned to send an ACK response or BA Response to the sub-channel of the access point.

[0405] S1903: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. It should be noted that, for the content contained in the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in Embodiment 14 to Embodiment 16 above, and the embodiments of the present invention will not be repeated here.

[0406] S 1904: The terminal sends an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0407] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA mode to send the ACK response or BA response to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0408] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the ACK request frame or BA request frame carrying OFDMA physical layer signaling sent by the access point, and determines to send the ACK response or BA response to the access point according to the OFDMA physical layer signaling. The subchannel of the entry point, so that each terminal can send an ACK response or a BA response to the access point at the same time on the corresponding subchannel, SP, through the way that the access point allocates subchannels for each terminal according to OFDMA physical layer signaling, so that The access point can make instructions for more terminals when sending ACK responses or BA responses to the access point, that is, the access point indicates that the number of sub-channels for the terminals is not limited to the number of terminals; and makes the ACK response or BA response of multiple terminals The BA response is transmitted to the access point in parallel, making full use of corresponding time-frequency resources.

[0409] FIG. 20 is a schematic flowchart of Embodiment 23 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends OFDMA physical layer signaling carrying an OFDMA ACK request or OFDMA BA request to the terminal, so that the terminal uses OFDMA mode to reply an ACK response or BA response on the subchannel corresponding to the terminal. As shown in Figure 20, the method includes:

[0410] S2001: The terminal receives the OFDMA physical layer signaling sent by the access point.

[0411] Specifically, the OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode, that is, the access point sends an ACK response or a BA response to the access point. The terminal requests to return an ACK response or a BA response to itself after the terminal obtains the corresponding OFDMA+MU-MIMO data information, so as to know whether the transmission of the following OFDMA+MU-MIMO data information is successful. The OFDMA physical layer signaling is used to indicate to the terminal the corresponding subchannel allocated for the terminal to send the ACK response or the BA response to the access point. S2002: The terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling. It should be noted that, for the OFDMA physical layer signaling in the embodiments of the present invention, reference may be made to the descriptions in the foregoing fourteenth to sixteenth embodiments, and the embodiments of the present invention will not be repeated here.

[0412] S2003: The terminal receives the OFDMA+MU-MIM0 data signal sent by the access point on the corresponding subchannel

[0413] J s from Θ,.

[0414] Optionally, the OFDMA+MU-MIMO data information may carry the above OFDMA physical layer signaling, or may not carry the above OFDMA physical layer signaling.

[0415] S2004: The terminal uses the OFDMA mode to send an ACK response or a BA response to the access point on the corresponding subchannel.

[0416] 0 Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, it uses the OFDMA+MU-MIMO mode to send the ACK response or BA response to the access point on the corresponding subchannel. The BA responds. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding subchannel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0417] 5 In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the

[0418] OFDMA physical layer signaling, determining a subchannel for sending an ACK response or a BA response to the access point according to the OFDMA physical layer signaling, so that each terminal can simultaneously send an ACK response or a BA response to the access point on the corresponding subchannel, SP, through the way that the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when sending ACK response 0 or BA response to the access point, that is, access The point is that the terminal indicates that the subchannel has no limit on the number of terminals; and the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, making full use of the corresponding time-frequency resources.

[0419] FIG. 21 is a schematic flowchart of Embodiment 24 of the indication method for data transmission provided by the present invention. The method involved in this embodiment is a process in which the access point sends OFDMA physical layer signaling and 5 ACK request frames or BA request frames to the terminal, so that the terminal uses OFDMA mode to reply with an ACK response or BA response on the subchannel corresponding to the terminal . As shown in Figure 21, the method includes:

[0420] S2101: The terminal receives the OFDMA physical layer signaling sent by the access point.

[0421] Specifically, the OFDMA physical layer signaling is used to indicate to the terminal the corresponding subchannel allocated for the terminal to send the ACK response or the BA response to the access point.

[0422] 0 S2102: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. It should be noted that, for the OFDMA physical layer signaling in the embodiment of the present invention, reference may be made to the descriptions in the foregoing Embodiment 14 to Embodiment 16, and the embodiments of the present invention will not be repeated here.

[0423] S2103: The terminal receives the OFDMA+MU-MIMO data signal sent by the access point on the corresponding subchannel.

[0424] Optionally, the OFDMA+MU-MIMO data information may carry the above OFDMA physical layer signaling, or may not carry the above OFDMA physical layer signaling.

[0425] S2104: The access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send an ACK response or The BA responds.

[0426] Specifically, the access point requests the terminal to reply with an ACK response or BA response to itself after obtaining the corresponding MU-MIM0 data information through the ACK request frame or BA request frame, so as to obtain the following OFDMA+MU-MIM0 data information whether the transmission was successful.

[0427] Optionally, the ACK request frame or BA request frame may carry the above OFDMA physical layer signaling, or may not carry the above OFDMA physical layer signaling. And optionally, when the above-mentioned OFDMA+MU-MIMO data information carries OFDMA physical layer signaling, the ACK request frame or BA request frame may not carry the above-mentioned OFDMA physical layer signaling; when the above-mentioned OFDMA+MU-MIMO data information If the OFDMA physical layer signaling is not carried in the ACK request frame or the BA request frame, the above OFDMA physical layer signaling may be carried.

[0428] S2105: The terminal sends an ACK response or a BA response to the access point on the corresponding subchannel in OFDMA mode.

[0429] Specifically, after the terminal determines the subchannel for sending the ACK response or BA response to the access point according to the above OFDMA physical layer signaling, and determines to use the OFDMA+MU-MIMO mode according to the dedicated information bits in the ACK request frame or the BA request frame An ACK response or BA response is sent to the access point on the corresponding subchannel. That is to say, each terminal can simultaneously send an ACK response or a BA response to the access point on its corresponding sub-channel, that is, the ACK responses or BA responses of multiple terminals can be transmitted in parallel, and then the corresponding time-frequency resources can be fully utilized .

[0430] In the data transmission indication method provided by the embodiment of the present invention, the terminal receives the OFDMA physical layer signaling sent by the access point, and determines the subchannel for sending the ACK response or BA response to the access point according to the OFDMA physical layer signaling, so that each The terminal can simultaneously send an ACK response or a BA response to the access point on the corresponding subchannel, SP, and the access point allocates subchannels to each terminal according to the OFDMA physical layer signaling, so that the access point can serve more terminals Sending an ACK response to the access point or BA response, that is, the access point indicates that the number of subchannels for the terminal is not limited to the terminal; and the ACK responses or BA responses of multiple terminals are transmitted to the access point in parallel, making full use of the corresponding time-frequency resources .

[0431] FIG. 22 is a schematic flowchart of Embodiment 25 of the indication method for data transmission provided by the present invention. The method of this embodiment relates to the transmission process of uplink OFDMA data information initiated by the terminal. This method specifically comprises the steps:

[0432] S2201: The terminal sends an uplink transmission frame to the access point.

[0433] Specifically, the method involved in this embodiment is the uplink OFDMA data information transmission process initiated by the above STA, and the uplink transmission frame carries an OFDMA data transmission request.

[0434] The terminal can transmit an uplink transmission frame in OFDM mode, which can be of any type. The terminal may carry an OFDMA data transmission request in the uplink transmission frame, and the OFDMA data transmission request is used to request the access point to complete subsequent data transmission in OFDMA mode.

[0435] After receiving the uplink transmission frame of the terminal, the access point decides whether to switch to OFDMA mode transmission according to the OFDMA data transmission request of the terminal or the current network situation, for example, whether there is a demand from other terminals at the access point. If the access point judges that it is necessary to switch to the OFDMA mode, the OFDMA mode is used in the next data transmission; if the access point judges that it does not switch to the OFDMA mode, the access point continues to use the OFDM mode for data transmission.

[0436] S2202: The terminal receives OFDMA physical layer signaling sent by the access point.

[0437] Specifically, when the access point judges that it needs to switch to the OFDMA mode according to the OFDMA data transmission request or the current network situation, and uses the OFDMA mode for data transmission, the access point will send the above OFDMA physical layer signaling to the terminal, and the OFDMA physical layer The signaling is used to instruct each terminal to send uplink OFDMA data information on its corresponding sub-channel.

[0438] It should be noted that the OFDMA physical layer signaling can be carried in the OFDM preamble in the above embodiment, or can be carried in the NDPA frame, and the OFDMA physical layer signaling can also be carried through cooperation between the NDPA frame and the OFDM preamble. For the specific process, reference may be made to the foregoing embodiments, and details are not repeated here.

[0439] Optionally, after S2202, the access point may also send the downlink OFDMA data information of the terminal on the sub-channels corresponding to each of the above-mentioned terminals. For the downlink OFDMA data transmission process, reference may be made to the above-mentioned embodiments, which will not be repeated here.

[0440] S2203: The terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling.

[0441] Specifically, the terminal learns that it sends information to the access point through the subchannel indicated by the OFDMA physical layer signaling. The sub-channel for sending the uplink OFDMA data information, that is to say, avoids the access point additionally instructing the terminal to transmit the signaling indication when the uplink OFDMA data information is transmitted, which improves the efficiency of the system.

[0442] S2204: The terminal uses the OFDMA mode to send uplink OFDMA data information to the access point on the corresponding subchannel.

[0443] After the terminal determines the subchannel for sending the uplink OFDMA data information to the access point according to the above OFDMA physical layer signaling, it sends the uplink OFDMA data information to the access point on the subchannel.

[0444] Optionally, if after the above S2202, the access point also sends downlink OFDMA data information to the terminal, then when the terminal receives the downlink OFDMA data information sent by the access point on the corresponding subchannel and waits for a fixed time period, the terminal The uplink OFDMA data information associated with the terminal will be sent on the subchannel.

[0445] In the data transmission indication method provided by the embodiment of the present invention, the terminal sends an uplink transmission frame to the access point, so that the access point indicates for each terminal the subchannel when sending the uplink OFDMA data information through OFDMA physical layer signaling, so that Each terminal can send data to the access point on the corresponding sub-channel. SP, assigning subchannels to the terminal by sending OFDMA physical layer signaling through the access point, so that the access point can make instructions for more terminals when sending uplink OFDMA data information to the access point, avoiding additional The signaling indication when instructing the terminal to transmit the uplink OFDMA data information improves the efficiency of the system.

[0446] Further, the method involved in this embodiment is aimed at the scenario where the terminal sends uplink OFDMA data information to the access point as shown in FIG. 22 above. After the terminal sends the uplink OFDMA data information to the access point, the terminal receives The process of sending ACK response or BA response on the corresponding sub-channel. Further, after the above S2204, the method also includes:

[0447] S2205: The terminal receives the ACK response or BA response corresponding to the above-mentioned uplink OFDMA data information sent by the access point on the corresponding subchannel.

[0448] Specifically, the terminal sends uplink OFDMA data information to the access point on its corresponding subchannel, and the uplink OFDMA data information carries an OFDMA ACK request or OFDMA BA request, so the OFDMA ACK request or OFDMA BA request is used to indicate the The access point sends an ACK response or a BA response to the terminal in OFDMA mode, that is, the access point feeds back the transmission status of uplink OFDMA data information to the terminal.

[0449] Since the access point itself is the subject of sending OFDMA physical layer signaling, the access point can directly send the uplink OFDMA data information associated with the terminal to the terminal on the corresponding subchannel ACK response or BA response, so that the terminal knows whether the uplink OFDMA data transmission is successful.

[0450] The data transmission indication method provided by the embodiment of the present invention enables the access point to send the above-mentioned uplink OFDMA to the terminal on the corresponding subchannel by carrying an ACK request or a BA request in the uplink OFDMA data information sent by the terminal to the access point ACK response or BA response corresponding to the data information. SP, through the way that the access point allocates subchannels for each terminal according to the OFDMA physical layer signaling, the access point can make instructions for more terminals when sending uplink OFDMA data to the access point, that is, the access point is a terminal The indicated subchannel has no limitation on the number of terminals, and enables the terminal to know whether the uplink OFDMA data transmission is successful according to the ACK response or BA response sent by the access point.

[0451] FIG. 23 is a schematic flowchart of Embodiment 26 of the indication method for data transmission provided by the present invention. The method of this embodiment relates to the transmission process of uplink OFDMA data information initiated by the access point. This method specifically comprises the steps:

[0452] S2301: The terminal receives OFDMA physical layer signaling sent by the access point.

[0453] Specifically, the OFDMA physical layer signaling can be carried in the OFDM preamble in the above embodiment, or can be carried in the NDPA frame, and the OFDMA physical layer signaling can also be carried through cooperation between the NDPA frame and the OFDM preamble. For the specific process, reference may be made to the foregoing embodiments, and details are not repeated here.

[0454] The OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for sending uplink OFDMA data information to the access point. Optionally, in all embodiments of the present invention, the OFDMA physical layer signaling may include an information bit, which is used to indicate to the terminal whether the allocation of the subchannel is for uplink, or only for downlink, or for Up and down bidirectional. In this embodiment, the information bit in the OFDMA physical layer signaling indicates to the terminal the subchannel that the subchannel is used for uplink transmission. When the access point obtains the right to use the channel, the issued OFDMA physical layer signaling instructs the terminal to send uplink OFDMA data information to the access point on the corresponding sub-channel.

[0455] S2302: The terminal determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling.

[0456] Specifically, the terminal learns the subchannel on which it sends uplink OFDMA data information to the access point through the subchannel indicated by the OFDMA physical layer signaling, that is to say, the access point avoids additional signaling to the terminal when transmitting uplink OFDMA data information. Instructions to improve the efficiency of the system.

[0457] S2303: The terminal uses the OFDMA mode to send uplink OFDMA data information to the access point on the corresponding subchannel.

[0458] Specifically, after the terminal determines the subchannel for sending uplink OFDMA data information to the access point according to the above OFDMA physical layer signaling, the terminal sends the uplink OFDMA data to the access point on the subchannel ^ from

[0459] I pi Θ,.

[0460] In the data transmission indication method provided by the embodiment of the present invention, the access point indicates the subchannel for the terminal to send uplink OFDMA data through OFDMA physical layer signaling, so that each terminal can send data to the access point on the corresponding subchannel . That is, the access point sends OFDMA physical layer signaling to assign subchannels to each terminal, so that the access point can indicate for more terminals when sending uplink OFDMA data to the access point, that is, the access point is a terminal Indicating sub-channels does not limit the number of terminals.

[0461] Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, Executing the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, and other various media that can store program codes.

[0462] Embodiment 1 of the present invention provides an access point, and the access point includes: a sending module 10, configured to send orthogonal frequency division multiple access (OFDMA) physical layer signaling to a terminal, where the OFDMA physical layer signaling is used to send the terminal Indicating the subchannel allocated for the terminal, so that the terminal determines the subchannel corresponding to the terminal according to OFDMA physical layer signaling; wherein, the OFDMA physical layer signaling includes the terminal identifier and subchannel information corresponding to the terminal identifier.

[0463] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0464] Optionally, the identifier of the above terminal is the identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the above OFDMA The physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, including: the above-mentioned OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional sub-channel; wherein, the terminal group corresponds to the sub-channel one by one; then the above-mentioned sending module 10 is also configured to send to the terminal the mapping relationship between the identifier of the terminal group and the address of the terminal before sending the OFDMA physical layer signaling to the terminal, so as to Make the terminal know the terminal group it belongs to.

[0465] Optionally, the above terminal identifier is an identifier of a terminal group, and the terminal group includes at least two terminals; then the above OFDMA physical layer signaling is used to allocate subchannels to each terminal in the terminal group as an uplink subchannel The channel is either a downlink sub-channel or an uplink-downlink bidirectional sub-channel; wherein, each terminal in the terminal group corresponds to the sub-channel one by one. The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0466] Optionally, the above-mentioned sending module 10 is specifically configured to send an OFDM preamble to the terminal; wherein, the OFDM preamble carries the above-mentioned OFDMA physical layer signaling.

[0467] Optionally, the above-mentioned sending module 10 is further configured to send a null data packet announcement NDPA frame to the terminal; wherein, the NDPA frame carries the above-mentioned OFDMA physical layer signaling.

[0468] Optionally, the above-mentioned sending module 10 is further configured to send an NDPA frame and an OFDM preamble to the terminal; wherein, the NDPA frame carries the identifier of the terminal in the above OFDMA physical layer signaling, and the OFDM preamble carries the above-mentioned OFDMA physical layer signaling. The sub-channel information corresponding to the identity of the terminal.

[0469] Optionally, the above-mentioned sending module 10 is further configured to send an NDPA frame and an OFDM preamble to the terminal; wherein, the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble Carry the identifier of the terminal in the above OFDMA physical layer signaling.

[0470] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0471] FIG. 24 is a schematic structural diagram of Embodiment 2 of the access point provided by the present invention. Further, on the basis of the first embodiment of the above device, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel allocated for the terminal to receive downlink OFDMA data, and the above sending module 10 is also used to After sending the OFDMA physical layer signaling to the terminal, the OFDMA mode is used to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes Handover Domain, Ultra High Throughput Signaling UHT_SIG_B.

[0472] Further, the above OFDMA physical layer signaling or downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block confirmation BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use the OFDMA mode to communicate with the terminal. The access point sends the ACK response or the BA response; then the OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or the BA response to the access point.

[0473] Then, on the basis of the first embodiment of the above-mentioned device, referring to FIG. 24, the access point further includes a receiving module 11, which is used to send the above-mentioned downlink OFDMA data information on the sub-channel corresponding to the terminal after the above-mentioned sending module 10 uses OFDMA mode, An ACK response or a BA response sent by the terminal on a sub-channel corresponding to the terminal in OFDMA mode is received.

[0474] The access point provided by the embodiment of the present invention can perform the above-mentioned indication method embodiment of data transmission The implementation principle and technical effect of the technical solution are similar, and will not be repeated here.

[0475] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above OFDMA physical layer signaling is used to indicate that the terminal is assigned to send an ACK response or a BA response to the access point corresponding to the terminal. channel; the above-mentioned sending module 10 is also used to send an ACK request frame or a BA request frame to the terminal after sending the downlink OFDMA data information on the sub-channel corresponding to the terminal; the above-mentioned receiving module 11 is also used to receive the terminal using the OFDMA mode ACK response or BA response sent on the corresponding subchannel.

[0476] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0477] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to adopt OFDMA mode Sending an ACK response or a BA response to the access point; then the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that sends the ACK response or BA response to the access point allocated for the terminal; then The above-mentioned sending module 10 is specifically configured to send MU-MIMO data information to the terminal in a multi-user multiple-input multiple-output MU-MIMO mode; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; the above-mentioned receiving module 11, It is also used to receive the ACK response or BA response sent by the terminal on the corresponding sub-channel in OFDMA mode after the above-mentioned sending module 10 sends the OFDMA physical layer signaling to the terminal.

[0478] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0479] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then The above sending module 10 is specifically configured to send MU-MIMO data information to the terminal in MU-MIMO mode; wherein, the MU-MIMO data information carries OFDMA physical layer signaling; and sends an ACK request frame or BA request to the terminal frame; wherein, the ACK request frame or BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the receiving module 11 above, It is also used to receive the ACK response or BA response sent by the terminal on the subchannel corresponding to the terminal in OFDMA mode after the above-mentioned sending module 10 sends the OFDMA physical layer signaling to the terminal.

[0480] The access point provided by the embodiment of the present invention can perform the above-mentioned indication method embodiment of data transmission The implementation principle and technical effect of the technical solution are similar, and will not be repeated here.

[0481] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then The above sending module 10 is specifically used to send MU-MIMO data information to the terminal in MU-MIMO mode; and send an ACK request frame or BA request frame to the terminal; wherein, the ACK request frame or BA request frame includes dedicated information bits, The dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the ACK request frame or BA request frame carries OFDMA physical layer signaling; the above receiving module 11 is also used After the above-mentioned sending module 10 sends the OFDMA physical layer signaling to the terminal, the terminal receives the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding sub-channel.

[0482] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0483] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to adopt OFDMA mode Sending an ACK response or a BA response to the access point; then the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that sends the ACK response or BA response to the access point allocated for the terminal; then The above-mentioned sending module 10 is also used to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal in the OFDMA+MU-MIMO mode after sending the OFDMA physical layer signaling to the terminal; The above-mentioned receiving module 11 is further configured to receive an ACK response or a BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0484] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0485] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above OFDMA physical layer signaling is specifically used to indicate to the terminal that the terminal is assigned to send an ACK response or a BA response to the access point. The corresponding sub-channel; then the above-mentioned sending module 10 is further configured to, after sending the OFDMA physical layer signaling to the terminal, use OFDMA+MU-MIMO mode to send the signal to the terminal on the sub-channel corresponding to the terminal The terminal sends OFDMA+MU-MIMO data information; and sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or the BA request frame includes dedicated information bits, and the dedicated information bits are used to indicate the The terminal sends an ACK response to the access point in OFDMA mode acknowledgment or BA response; the above receiving module 11 is also configured to receive the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding subchannel.

[0486] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0487] Continuing to refer to FIG. 24 , on the basis of the embodiment shown in FIG. 24 , the above OFDMA physical layer signaling is specifically used to indicate to the terminal that the terminal assigned to send uplink OFDMA data information to the access point corresponds to The above receiving module 11 is further configured to receive the uplink transmission frame sent by the terminal before the above sending module 10 sends the OFDMA physical layer signaling to the terminal; and the above sending module 10 sends the terminal to the terminal After sending the OFDMA physical layer signaling, receiving the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding sub-channel.

[0488] Further, the above-mentioned uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is also used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode ; then the above-mentioned sending module 10 is further configured to, after the above-mentioned receiving module 11 receives the uplink OFDMA data information sent by the terminal on the corresponding sub-channel, use OFDMA mode to send the uplink OFDMA data information on the sub-channel corresponding to the terminal. ACK response or BA response corresponding to OFDMA data information.

[0489] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0490] Continuing to refer to FIG. 24, on the basis of the embodiment shown in FIG. 24, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point; The receiving module 11 is also configured to receive the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel after the above-mentioned sending module 10 sends the OFDMA physical layer signaling to the terminal.

[0491] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0492] FIG. 25 is a schematic structural diagram of Embodiment 1 of the terminal provided by the present invention. As shown in FIG. 25, the terminal includes a receiving module 20 and a determining module 21.

[0493] The receiving module 20 is configured to receive Orthogonal Frequency Division Multiple Access OFDMA physical layer signaling sent by the access point, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated by the access point to the terminal; wherein, The OFDMA physical layer signaling includes the identity of the terminal and the information corresponding to the identity of the terminal Subchannel information.

[0494] A determining module 21, configured to determine the subchannel corresponding to the terminal according to the OFDMA physical layer signaling.

[0495] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0496] Optionally, the identifier of the above terminal is the identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the above OFDMA The physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, including: the above-mentioned OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional sub-channel; wherein, the terminal group corresponds to the sub-channel one-to-one; then the receiving module 20 is also configured to receive the terminal sent by the access point before receiving the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point The mapping relationship between the identifier of the group and the address of the terminal; then the determination module 21 is specifically configured to determine that it is located in the terminal group according to the above mapping relationship, and then determine the subchannel corresponding to the terminal group as the subchannel corresponding to the terminal.

[0497] Optionally, the above terminal identifier is an identifier of a terminal group, and the terminal group includes at least two terminals; then the above OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, including: the OFDMA physical layer signaling The layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein each terminal in the terminal group corresponds to a subchannel one by one.

[0498] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0499] On the basis of the above-mentioned embodiment shown in FIG. 25, further, the above-mentioned receiving module 20 is specifically configured to receive an OFDM preamble sent by an access point; wherein, the OFDM preamble carries OFDMA physical layer signaling .

[0500] Optionally, the above receiving module 20 is also configured to receive the empty data packet notification sent by the access point

[0501] NDPA frame; wherein, the NDPA frame carries OFDMA physical layer signaling.

[0502] Optionally, the receiving module 20 is further configured to receive an NDPA frame and an OFDM preamble sent by an access point; wherein, the NDPA frame carries an identifier of a terminal in OFDMA physical layer signaling, and the OFDM preamble carries OFDMA physical layer signaling The subchannel information corresponding to the identifier of the terminal in .

[0503] Optionally, the above receiving module 20 is also used to receive the NDPA frame sent by the access point and the OFDM front where, the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

[0504] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0505] Fig. 26 is a schematic structural diagram of the second embodiment of the terminal provided by the present invention. On the basis of the above-mentioned embodiment shown in FIG. 25, further, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated by the access point for receiving downlink OFDMA data, then the above-mentioned receiving module 20 , is further configured to receive downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal after the determining module 21 determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling; wherein, the downlink OFDMA data information It includes an OFDMA preamble and OFDMA data, and the OFDMA preamble includes a switching field and an ultra-high throughput signaling UHT-SIG_B.

[0506] Then, on the basis of the above-mentioned embodiment shown in FIG. 25, further, the above-mentioned receiving module 20 includes a receiving unit 201, configured to receive the destination terminal address sent by the access point and corresponding to the above-mentioned OFDMA data; the judging unit 202 uses It is used to determine whether the address matches the address of the above-mentioned destination terminal; if so, instruct the receiving unit 201 to receive the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal.

[0507] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0508] Fig. 27 is a schematic structural diagram of the third embodiment of the terminal provided by the present invention. The above-mentioned OFDMA physical layer signaling or the above-mentioned downlink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send an ACK response to the access point or BA response; the above OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or BA response to the access point. Then, on the basis of the above-mentioned embodiment shown in FIG. 26, further, the above-mentioned terminal further includes: a sending module 22, configured to receive downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal in the above-mentioned receiving module 20 Afterwards, the OFDMA mode is used to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal.

[0509] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0510] Continuing to refer to FIG. 27, the above OFDMA physical layer signaling is also used to indicate the transmission allocated for the terminal Send an ACK response or a BA response to the subchannel corresponding to the terminal of the access point; then the above receiving module 20 is also used to receive the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal, and then receive An ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to use OFDMA mode to send to the access point ACK response or BA response; the above-mentioned sending module 22 is also configured to send an ACK response or BA response to the access point on the sub-channel corresponding to the terminal in OFDMA mode.

[0511] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0512] Continuing to refer to FIG. 27, the OFDMA physical layer signaling above carries an OFDMA ACK request or OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA to the access point in OFDMA mode Response; the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that sends the ACK response or BA response to the access point assigned to the terminal; then the above-mentioned receiving module 20 is specifically used to receive the subchannel sent by the access point The multi-user multiple-input multiple-output MU-MIMO data information; the above-mentioned sending module 22 is also used to use the OFDMA mode on the sub-channel corresponding to the terminal after the above-mentioned determining module 21 determines the sub-channel corresponding to the terminal according to the OFDMA physical layer signaling Send ACK response or BA response to access point.

[0513] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0514] Continuing to refer to FIG. 27, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned receiving module 20 is specifically used to receive the access The MU-MIMO data information sent by the point; wherein, the MU-MIMO data information carries the above OFDMA physical layer signaling; and receives the ACK request frame or BA request frame sent by the access point; wherein, the ACK request frame or BA The request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the sending module 22 is also used in the determination module 21 to After layer signaling determines the subchannel corresponding to the terminal, the OFDMA mode is used to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal.

[0515] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0516] Continuing to refer to FIG. 27, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal that the terminal allocates Send ACK response or BA response to the subchannel corresponding to the terminal of the access point; then the above receiving module 20 is specifically used to receive the MU-MIMO data information sent by the access point; and receive the ACK request frame or the ACK request frame sent by the access point BA request frame; wherein, the ACK request frame or BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the ACK request The OFDMA physical layer signaling is carried in the frame or the BA request frame; the sending module 22 is also used to use the OFDMA mode to transmit the subchannel corresponding to the terminal after the determining module 21 determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling Send ACK response or BA response to access point.

[0517] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0518] Continuing to refer to FIG. 27, the OFDMA physical layer signaling above carries an OFDMA ACK request or OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA to the access point in OFDMA mode Response; the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that is allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned receiving module 20 is also used for the above-mentioned determination After the module 21 determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, it receives the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal; An ACK response or a BA response is sent to the access point on the corresponding sub-channel.

[0519] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0520] Continuing to refer to FIG. 27, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned receiving module 20 is also used for determining After the module 21 determines the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling, it receives the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal; and receives the ACK request frame sent by the access point or a BA request frame; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the above sending Module 22 is further configured to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode.

[0521] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here. Continuing to refer to FIG. 27, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel allocated for the terminal to send uplink OFDMA data information to the access point; Before the OFDMA physical layer signaling sent by the access point, send the uplink transmission frame to the access point; and it is also used to determine the subchannel corresponding to the terminal according to the OFDMA physical layer signaling by the above-mentioned determination module 21. Using In the OFDMA mode, the uplink OFDMA data information is sent to the access point on the sub-channel corresponding to the terminal.

[0522] Further, the above-mentioned uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is also used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode Then the receiving module 20 is further configured to receive the ACK response corresponding to the uplink OFDMA data information sent by the access point on the subchannel corresponding to the terminal after the sending module 22 sends the uplink OFDMA data information to the access point or BA response.

[0523] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0524] Continuing to refer to FIG. 27, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that sends uplink OFDMA data information to the access point allocated for the terminal; 21 After determining the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, send the uplink OFDMA data information to the access point on the subchannel corresponding to the terminal in an OFDMA mode.

[0525] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0526] The third embodiment of the access point of the present invention provides an access point, the access point includes: a transmitter 30, configured to send orthogonal frequency division multiple access (OFDMA) physical layer signaling to the terminal, the OFDMA physical layer signaling It is used to indicate to the terminal the subchannel information allocated for the terminal, so that the terminal determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling; where the OFDMA physical layer signaling includes the identifier of the terminal and the subchannel corresponding to the identifier of the terminal channel information.

[0527] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0528] Optionally, the identifier of the above terminal is the identifier of one or more terminal groups, and each terminal group includes at least one terminal; the subchannel information includes uplink subchannel or downlink subchannel or uplink and downlink bidirectional subchannel, then the above OFDMA The physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, Including: The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein, a terminal group corresponds to a subchannel one by one.

[0529] The above-mentioned transmitter 30 can also be used to send the mapping relationship between the identifier of the terminal group and the address of the terminal to the terminal before sending the OFDMA physical layer signaling to the terminal, so that the terminal knows the terminal group it is in.

[0530] Optionally, the above terminal identifier is an identifier of a terminal group, and the terminal group includes at least two terminals; then the above OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, including: the OFDMA physical layer signaling The layer signaling is used to indicate to each terminal in the terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional subchannel; wherein each terminal in the terminal group corresponds to a subchannel one by one.

[0531] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0532] Further, the above-mentioned transmitter 30 is specifically configured to send an OFDM preamble to the terminal; wherein, the OFDM preamble carries the OFDMA physical layer signaling.

[0533] Optionally, the above-mentioned transmitter 30 may also be configured to send a null data packet announcement NDPA frame to the terminal; wherein, the NDPA frame carries the OFDMA physical layer signaling.

[0534] Optionally, the foregoing transmitter 30 may also be configured to send an NDPA frame and an OFDM preamble to the terminal; wherein, the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the OFDMA physical layer Sub-channel information corresponding to the identifier of the terminal in the signaling.

[0535] Optionally, the foregoing transmitter 30 may also be configured to send an NDPA frame and an OFDM preamble to the terminal; where the NDPA frame carries subchannel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, the The OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

[0536] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0537] Further, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel allocated for the terminal to receive downlink OFDMA data, then the above-mentioned transmitter 30 can also be used to send the physical layer of Orthogonal Frequency Division Multiple Access OFDMA to the terminal. After layer signaling, use OFDMA mode to send downlink OFDMA data information on the subchannel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover field and ultra-high throughput signaling UHT_SIG_B. Optionally, the manner in which the above-mentioned transmitter 30 transmits downlink OFDMA data information to each terminal on the sub-channel corresponding to the terminal may be built in the transmitter 20 with an inverse discrete Fourier transform (Inverse Di The screte Fourier Transform, hereinafter referred to as IDFT) module is implemented, that is, the access point can first encode the downlink data of multiple terminals, separate the spatial streams, and use the space-time encoder to form multiple space-time streams, as shown in FIG. 28 . The space-time streams will correspond to the antennas of the access point. The space-time streams of different terminals on the same antenna will be mapped to the sub-channel or sub-carrier corresponding to the terminal through the IDFT module corresponding to the antenna, so as to realize the transmission of respective downlink OFDMA to the terminal through different sub-channels Data information. If the access point has multiple antennas, there are a corresponding number of IDFT modules (if the number of antennas is M, the number of IDFT modules is also M). These IDFT modules all work in the same frequency band. Therefore, for OFDMA with multiple antennas at the access point, different users work on different subchannels; on the same subchannel, their space-time streams can be distinguished by spatial mapping. The space-time stream may further support MU-MIMO implementation on sub-channels.

[0538] Correspondingly, the terminal will use a discrete Fourier transform (Inverse Di screte Fourier Transform, hereinafter referred to as DFT) module to demodulate to obtain the data at the receiving end, and obtain the data on the subchannel where it is located according to the OFDMA physical layer signaling instruction. For this part of the data, if it is a multi-antenna spatially mapped signal, multi-antenna separation is used; if it is a single-antenna signal, no separation is required.

[0539] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0540] FIG. 29 is a schematic structural diagram of Embodiment 4 of the access point provided by the present invention. The access point includes the above-mentioned transmitter 30, and also includes a receiver 31.

[0541] The above-mentioned OFDMA physical layer signaling or the above-mentioned downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block confirmation BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send to the access point ACK response or BA response; then the above-mentioned OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or BA response to the access point; then the above-mentioned receiver 31, It is used for receiving the ACK response or BA response sent by the terminal on the subchannel corresponding to the terminal using OFDMA mode after the transmitter 30 transmits the downlink OFDMA data information on the subchannel corresponding to the terminal using OFDMA mode.

[0542] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here. Optionally, the above-mentioned OFDMA physical layer signaling is used for the subchannel corresponding to the terminal assigned by the terminal to send an ACK response or a BA response to the access point; then the above-mentioned transmitter 30 may also be used for After sending the downlink OFDMA data information on the subchannel corresponding to the terminal, an ACK request frame or a BA request frame is sent to the terminal; wherein, the ACK request frame or the BA request frame includes dedicated information bits, and the dedicated information bits are used to indicate The terminal sends an ACK response or a BA response to the access point in the OFDMA mode; the above receiver 31 may also be used to receive the ACK response or the BA response sent by the terminal on the corresponding subchannel in the OFDMA mode.

[0543] Optionally, the OFDMA physical layer signaling above carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode ; then the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the above transmitter 30 is specifically used to adopt multi-user multiple The input multiple output MU-MIMO mode sends MU-MIMO data information to the terminal; wherein, the MU-MIMO data information carries OFDMA physical layer signaling; the above receiver 31 can also be used to send positive information to the terminal at the above transmitter 30 After cross frequency division multiple access OFDMA physical layer signaling, the terminal receives the ACK response or BA response sent on the corresponding sub-channel in OFDMA mode.

[0544] Optionally, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned transmitter 30 is specifically used to use MU-MIMO. mode to send MU-MIMO data information to the terminal; wherein, the MU-MIMO data information carries OFDMA physical layer signaling; and sends an ACK request frame or BA request frame to the terminal; wherein, the ACK request frame or BA request frame includes A dedicated information bit, the dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the above receiver 31 can also be used to send an orthogonal frequency division signal to the terminal at the transmitter After the multiple access OFDMA physical layer signaling, the terminal receives the ACK response or BA response sent on the corresponding sub-channel in the OFDMA mode.

[0545] Optionally, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned transmitter 30, specifically It is used to send MU-MIMO data information to the terminal in MU-MIMO mode; and send an ACK request frame or BA request frame to the terminal; wherein, the ACK request frame or BA request frame includes dedicated information bits, and the dedicated information bits use Instructing the terminal to send an ACK response or BA response to the access point in OFDMA mode; the ACK request frame or BA request frame carries OFDMA physical layer signaling; The above-mentioned receiver 31 can also be used to receive the ACK response or BA response sent by the terminal on the corresponding subchannel in OFDMA mode after the above-mentioned transmitter 30 sends the OFDMA physical layer signaling to the terminal.

[0546] Optionally, the OFDMA physical layer signaling above carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode ; Then the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that sends the ACK response or BA response to the access point assigned to the terminal; the above-mentioned transmitter 30 can also be used to send the orthogonal After frequency division multiple access OFDMA physical layer signaling, use OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the subchannel corresponding to the terminal; the above receiver 31 can also be used to receive ACK response or BA response sent in OFDMA mode on the subchannel.

[0547] Optionally, the foregoing OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; After the terminal sends the OFDMA physical layer signaling, it uses the 0FDMA+MU-MIM0 mode to send 0FDMA+MU-MIM0 data information to the terminal on the subchannel corresponding to the terminal; and sends an ACK request frame or BA request to the terminal frame; wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the above receiver 31, It can also be used to receive the ACK response or BA response sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0548] Optionally, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point; then the above receiver 31 can also be used to transmit Before the transmitter 30 sends the OFDMA physical layer signaling to the terminal, it receives the uplink transmission frame sent by the terminal; and after the transmitter 30 sends the OFDMA physical layer signaling to the terminal, it receives the terminal The uplink OFDMA data information sent in the OFDMA mode on the corresponding sub-channel. Optionally, the transmitter 30 can also realize the transmission of uplink OFDMA data information through the IDFT module, that is, each terminal can know that only the subchannel or subcarrier mapped by the IDFT module is used according to the OFDMA physical layer signaling. For the corresponding part, set other parts to 0, as shown in Figure 30.

[0549] Optionally, the above-mentioned uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is also used to instruct the access point to use OFDMA mode to send an ACK response or a BA response to the terminal; then the above-mentioned transmitter 30 is also used to use the OFDMA mode to transmit the uplink OFDMA data information on the corresponding sub-channel of the terminal after the above-mentioned receiver 31 receives the uplink OFDMA data information sent by the terminal on the corresponding sub-channel. An ACK response or a BA response corresponding to the uplink OFDMA data information is sent on the channel.

[0550] Optionally, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point; then the above receiver 31 is also used After the transmitter 30 sends the OFDMA physical layer signaling to the terminal, it receives the uplink OFDMA data information sent by the terminal in the OFDMA mode on the corresponding subchannel.

[0551] The access point provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0552] FIG. 31 is a schematic structural diagram of Embodiment 4 of the terminal provided by the present invention. As shown in Figure 31, the terminal includes: a receiver 40 and a processor 41.

[0553] The receiver 40 is configured to receive the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point, where the OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated by the access point to the terminal; wherein, the OFDMA The physical layer signaling includes the identifier of the terminal and subchannel information corresponding to the identifier of the terminal.

[0554] The processor 41 is configured to determine the subchannel corresponding to the terminal according to the above OFDMA physical layer signaling. The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0555] Optionally, the above-mentioned identifier of the terminal is an identifier of one or more terminal groups, and each terminal group includes at least one terminal; then the above-mentioned 0FDMA The physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, including: the above-mentioned OFDMA physical layer signaling is used to indicate to each terminal group that the allocated subchannel is an uplink subchannel or a downlink subchannel or an uplink and downlink bidirectional A subchannel; wherein, a terminal group corresponds to a subchannel one by one.

[0556] The above-mentioned receiver 40 may also be used to receive the mapping relationship between the identification of the terminal group and the address of the terminal sent by the access point before receiving the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point; then the above processing The device 41 is specifically configured to judge that it is located in the terminal group according to the above mapping relationship, and then determine the subchannel corresponding to the terminal group as the subchannel corresponding to the terminal.

[0557] Optionally, the above terminal identifier is an identifier of a terminal group, and the terminal group includes at least two terminals; then the above OFDMA physical layer signaling is used to indicate to the terminal the subchannel information allocated for the terminal, Including: the OFDMA physical layer signaling is used to allocate subchannels to each terminal in the terminal group as uplink subchannels or downlink subchannels or uplink and downlink bidirectional subchannels; wherein, each terminal in the terminal group and the subchannel Channels correspond to each other.

[0558] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0559] Further, the above-mentioned receiver 40 is specifically configured to receive the OFDM preamble sent by the access point; where the OFDM preamble carries the above-mentioned OFDMA physical layer signaling.

[0560] Optionally, the above-mentioned receiver 40 may also be used to receive the empty data packet announcement NDPA frame sent by the access point; wherein, the NDPA frame carries the above-mentioned OFDMA physical layer signaling.

[0561] Optionally, the foregoing receiver 40 may also be configured to receive an NDPA frame and an OFDM preamble sent by an access point; wherein, the NDPA frame carries an identifier of a terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the foregoing OFDMA The subchannel information corresponding to the identifier of the terminal in the physical layer signaling.

[0562] Optionally, the foregoing receiver 40 may also be configured to receive an NDPA frame and an OFDM preamble sent by an access point; wherein, the NDPA frame carries the subchannel information corresponding to the identifier of the terminal in the foregoing OFDMA physical layer signaling, the The OFDM preamble carries the identifier of the terminal in the above OFDMA physical layer signaling.

[0563] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0564] Further, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated by the access point for receiving downlink OFDMA data for the terminal, and the above-mentioned receiver 40 is also used for the above-mentioned processor 41 to receive the sub-channel according to the OFDMA physical layer signal. After the sub-channel corresponding to the terminal is determined, the downlink OFDMA data information sent by the access point is received on the sub-channel corresponding to the terminal; wherein, the downlink OFDMA data information includes an OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover field, a super high throughput signaling

[0565] Further, the above-mentioned receiver 40 is specifically configured to receive the destination terminal address corresponding to the OFDMA data sent by the access point; and judge whether it matches the destination terminal address; if so, receive the access on the subchannel corresponding to the terminal The downlink OFDMA data information sent by the point.

[0566] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0567] Fig. 32 is a schematic structural diagram of the fifth embodiment of the terminal provided by the present invention. On the basis of the above embodiment shown in FIG. 31, further, the terminal further includes a transmitter 42. Optionally, the above-mentioned OFDMA physical layer signaling or the above-mentioned downlink OFDMA data information carries an OFDMA confirmation ACK request or an OFDMA block confirmation BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to use OFDMA mode to send to the The access point sends an ACK response or a BA response; then the above OFDMA physical layer signaling is also used to indicate the subchannel corresponding to the terminal allocated for the terminal to send the ACK response or the BA response to the access point, then the above The transmitter 42 is configured to, after the receiver 40 receives the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal, send an ACK response or send an ACK response to the access point in the OFDMA mode on the subchannel corresponding to the terminal BA response.

[0568] Optionally, the foregoing OFDMA physical layer signaling is also used to indicate a subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; the foregoing receiver 40 may also be used for After receiving the downlink OFDMA data information sent by the access point on the subchannel corresponding to the terminal, receive the ACK request frame or the BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes dedicated information bits, so The dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the transmitter 42 is used to send an ACK response or BA response to the access point on the subchannel corresponding to the terminal in OFDMA mode The BA responds.

[0569] Optionally, the OFDMA physical layer signaling above carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode ; Then the OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal that is allocated for the terminal to send an ACK response or a BA response to the access point; then the above-mentioned receiver 40 can also be used to receive The multi-user multiple-input multiple-output MU-MIMO data information sent; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; the transmitter 42 is used to determine according to the OFDMA physical layer signaling in the processor 41 After the sub-channel corresponding to the terminal, the OFDMA mode is used to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

[0570] Optionally, the foregoing OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the foregoing receiver 40 may also be used to receive the access The MU-MIMO data information sent by the point; Wherein, the OFDMA physical layer signaling is carried in the MU-MIMO data information; And receive the ACK request frame or BA request frame sent by the access point; Wherein, the ACK request frame or BA The request frame includes a dedicated information bit, and the dedicated information bit is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode;

[0571] The transmitter 42 is configured to determine the terminal at the processor 41 according to the OFDMA physical layer signaling After the subchannel corresponding to the terminal, the OFDMA mode is used to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal.

[0572] Optionally, the foregoing OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send an ACK response or a BA response to the access point; then the foregoing receiver 40 may also be used to receive the access The MU-MIMO data information sent by the access point; and receive the ACK request frame or the BA request frame sent by the access point; wherein, wherein, the ACK request frame or the BA request frame includes a dedicated information bit, and the dedicated information bit is used to indicate The terminal sends an ACK response or a BA response to the access point in OFDMA mode; the ACK request frame or the BA request frame carries OFDMA physical layer signaling; After the physical layer signaling determines the subchannel corresponding to the terminal, the OFDMA mode is used to send an ACK response or a BA response to the access point on the subchannel corresponding to the terminal.

[0573] Optionally, the OFDMA physical layer signaling above carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode ; then the OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal for sending an ACK response or a BA response to the access point assigned to the terminal; then the above-mentioned receiver 40 can also be used in the above-mentioned processor 41 After determining the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, receiving the OFDMA+MU-MIMO data information sent by the access point on the subchannel corresponding to the terminal; Send an ACK response or BA response to the access point on the subchannel.

[0574] Optionally, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the transmission allocated for the terminal

[0575] An ACK response or a BA response to the subchannel corresponding to the terminal of the access point; then the receiver 40 may also be used to, after the processor 41 determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, in the subchannel corresponding to the terminal Receiving OFDMA+MU-MIMO data information sent by the access point on the subchannel; and receiving an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or the BA request frame includes dedicated information bits, the The dedicated information bit is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; the transmitter 42 is used to send an ACK response or BA response to the access point on a subchannel corresponding to the terminal in OFDMA mode The BA responds.

[0576] Optionally, the above-mentioned OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel allocated for the terminal to send uplink OFDMA data information to the access point; then the above-mentioned transmitter 42 can also be used to receive Before the Orthogonal Frequency Division Multiple Access 0FDMA physical layer signaling sent by the ingress, send It can also be used to send uplink OFDMA to the access point on the subchannel corresponding to the terminal in the OFDMA mode after the above-mentioned processor 41 determines the subchannel corresponding to the terminal according to the OFDMA physical layer signaling Data information.

[0577] Optionally, the above-mentioned uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, and the OFDMA ACK request or OFDMA BA request is also used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode Then the receiver 40 can also be used to receive the ACK response corresponding to the uplink OFDMA data information sent by the access point on the subchannel corresponding to the terminal after the transmitter 42 sends the uplink OFDMA data information to the access point or BA response.

[0578] Optionally, the above OFDMA physical layer signaling is specifically used to indicate to the terminal the subchannel corresponding to the terminal allocated for the terminal to send uplink OFDMA data information to the access point; 41 After determining the subchannel corresponding to the terminal according to the OFDMA physical layer signaling, send uplink OFDMA data information to the access point on the subchannel corresponding to the terminal in the OFDMA mode.

[0579] The terminal provided by the embodiment of the present invention can implement the technical solution of the above embodiment of the indication method for data transmission, and its implementation principle and technical effect are similar, and will not be repeated here.

[0580] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims

Claims 1. A method for indicating data transmission, characterized in that, include: The access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal. The OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, so that the terminal can determine the sub-channel corresponding to the terminal according to the OFDMA physical layer signaling. The OFDMA physical layer signaling includes the identifier of the terminal and the sub-channel information corresponding to the identifier of the terminal.

2. The method according to claim 1, characterized in that, The terminal identifier is the identifier of one or more terminal groups, each terminal group including at least one terminal; the sub-channel information includes uplink sub-channels, downlink sub-channels, or bidirectional uplink and downlink sub-channels, then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink / downlink sub-channel; wherein, the terminal group corresponds to the sub-channel.

3. The method according to claim 2, characterized in that, Before the access point sends OFDMA physical layer signaling to the terminal, it also includes: The access point sends the mapping relationship between the identifier of the terminal group and the address of the terminal to the terminal, so that the terminal knows the terminal group it belongs to.

4. The method according to claim 1, characterized in that, The identifier of the terminal is the identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink and downlink sub-channel; wherein, each terminal in the terminal group corresponds one-to-one with the sub-channel.

5. The method according to any one of claims 1-4, characterized in that, The access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, including: The access point sends an Orthogonal Frequency Division Multiplexing (OFDM) preamble to the terminal; wherein the OFDM preamble carries the OFDMA physical layer signaling; or... The access point sends an Empty Data Packet Announcement (NDPA) frame to the terminal; wherein the NDPA frame carries the OFDMA physical layer signaling.

6. The method according to any one of claims 1-4, characterized in that, The access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, including: The access point sends an NDPA frame and an OFDM preamble to the terminal. The NDPA frame carries the terminal identifier in the OFDMA physical layer signaling, and the OFDM preamble carries the sub-channel information corresponding to the terminal identifier in the OFDMA physical layer signaling; or, the NDPA frame carries the sub-channel information corresponding to the terminal identifier in the OFDMA physical layer signaling, and the OFDM preamble carries the terminal identifier in the OFDMA physical layer signaling.

7. The method according to any one of claims 1-6, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated for receiving downlink OFDMA data. After the access point sends the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, it also includes: The access point uses OFDMA mode to transmit downlink OFDMA data information on the sub-channel corresponding to the terminal; wherein, the downlink OFDMA data information includes OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover domain and ultra-high throughput signaling UHT-SIG_B.

8. The method according to claim 7, characterized in that, The OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA ACK request or an OFDMA block BA request. The OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode. The OFDMA physical layer signaling is also used to instruct the sub-channel corresponding to the terminal allocated to send an ACK response or a BA response to the access point. After the access point transmits the downlink OFDMA data information on the sub-channel corresponding to the terminal in OFDMA mode, the method further includes: The access point receives an ACK response or a BA response sent by the terminal in OFDMA mode on the sub-channel corresponding to the terminal.

9. The method according to claim 7, characterized in that, The OFDMA physical layer signaling is used to indicate the sub-channel corresponding to the terminal allocated for sending an ACK response or BA response to the access point. After the access point sends the downlink OFDMA data information on the sub-channel corresponding to the terminal, it further includes: The access point sends an ACK request frame or a BA request frame to the terminal; wherein the ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the access point receives the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

10. The method according to any one of claims 1-4, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to send an ACK response or a BA response to the access point via the allocated sub-channel. The access point then sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, including: The access point sends MU-MIMO data information to the terminal using a multi-user multiple-input multiple-output (MU-MIMO) mode; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; After the access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, the method further includes: The access point receives the ACK or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

11. The method according to any one of claims 1-4, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK or BA response to the access point for the sub-channel corresponding to the terminal; then the access point sends OFDMA physical layer signaling to the terminal, including: The access point sends MU-MIMO data information to the terminal using MU-MIMO mode; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; The access point sends an ACK request frame or a BA request frame to the terminal; wherein the ACK request frame or BA request frame includes dedicated information bits, which are used to instruct the terminal to adopt... In 0FDMA mode, an ACK response or a BA response is sent to the access point; After the access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, the method further includes: The access point receives an ACK response or a BA response sent by the terminal in OFDMA mode on the sub-channel corresponding to the terminal.

12. The method according to any one of claims 1-4, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK or BA response to the access point for the sub-channel corresponding to the terminal; then the access point sends OFDMA physical layer signaling to the terminal, including: The access point sends MU-MIMO data information to the terminal using MU-MIMO mode; the access point sends an ACK request frame or a BA request frame to the terminal; wherein, the ACK request frame or BA request frame includes dedicated information bits, which are used to indicate that the terminal adopts... OFDMA mode sends an ACK response or BA response to the access point; the ACK request frame or BA request frame carries the OFDMA physical layer signaling; After the access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, the method further includes: The access point receives the ACK or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

13. The method according to any one of claims 1-4, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to send an ACK response or a BA response to the access point via the allocated sub-channel. After the access point sends the OFDMA physical layer signaling to the terminal, it further includes: The access point uses the OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the sub-channel corresponding to the terminal. The access point receives the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

14. The method according to any one of claims 1-4, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK or BA response to the access point for the sub-channel corresponding to the terminal; after the access point sends the OFDMA physical layer signaling to the terminal, it also includes: The access point uses the OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the sub-channel corresponding to the terminal. The access point sends an ACK request frame or a BA request frame to the terminal; wherein the ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the access point receives the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

15. The method according to any one of claims 1-6, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal on the sub-channel corresponding to the terminal that is allocated for sending uplink OFDMA data information to the access point; Before the access point sends the OFDMA physical layer signaling to the terminal, it further includes: The access point receives the uplink transmission frame sent by the terminal; After the access point sends Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, it further includes: The access point receives the uplink OFDMA data information sent by the terminal in OFDMA mode on the corresponding sub-channel.

16. The method according to claim 15, characterized in that, The uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request, which further instructs the access point to send an ACK response or a BA response to the terminal in OFDMA mode. After receiving the uplink OFDMA data information sent by the terminal on the corresponding sub-channel, the access point further includes: The access point uses OFDMA mode to send an ACK or BA response corresponding to the uplink OFDMA data information on the sub-channel corresponding to the terminal.

17. The method according to any one of claims 1-6, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal on the sub-channel corresponding to the terminal that is allocated for sending uplink OFDMA data information to the access point; then, after the access point sends the OFDMA physical layer signaling to the terminal, it further includes: The access point receives the uplink OFDMA data information sent by the terminal in OFDMA mode on the corresponding sub-channel.

18. A method for indicating data transmission, characterized in that, include: The terminal receives Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point. The OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal by the access point. The OFDMA physical layer signaling includes the identifier of the terminal and sub-channel information corresponding to the identifier of the terminal. The terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling.

19. The method according to claim 18, characterized in that, The terminal identifier is the identifier of one or more terminal groups, each terminal group including at least one terminal; the sub-channel information includes uplink sub-channels, downlink sub-channels, or bidirectional uplink and downlink sub-channels, then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink / downlink sub-channel; wherein, the terminal group corresponds to the sub-channel.

20. The method according to claim 19, characterized in that, Before the terminal receives the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point, it also includes: The terminal receives the mapping relationship between the identifier of the terminal group and the address of the terminal sent by the access point; The terminal then determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, including: If a terminal determines that it is located within the terminal group based on the mapping relationship, then the terminal will determine the sub-channel corresponding to the terminal group as the sub-channel corresponding to the terminal.

21. The method according to claim 18, characterized in that, The identifier of the terminal is the identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink and downlink sub-channel; wherein, each terminal in the terminal group corresponds one-to-one with the sub-channel.

22. The method according to any one of claims 18-21, characterized in that, The terminal receives Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point, including: The terminal receives an Orthogonal Frequency Division Multiplexing (OFDM) preamble sent by the access point; wherein the OFDM preamble carries the OFDM physical layer signaling; or... The terminal receives an Empty Data Packet Notification (NDPA) frame sent by the access point; wherein the NDPA frame carries the OFDMA physical layer signaling.

23. The method according to any one of claims 18-21, characterized in that, The terminal receiving Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point also includes: The terminal receives an NDPA frame and an OFDM preamble sent by the access point; wherein the NDPA frame carries the terminal's identifier in the OFDMA physical layer signaling, and the OFDM preamble carries sub-channel information in the OFDMA physical layer signaling corresponding to the terminal's identifier; or, the NDPA frame carries sub-channel information in the OFDMA physical layer signaling corresponding to the terminal's identifier, and the OFDM preamble carries the terminal's identifier in the OFDMA physical layer signaling.

24. The method according to any one of claims 18-23, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated by the access point for receiving downlink OFDMA data. After the terminal determines the corresponding sub-channel based on the OFDMA physical layer signaling, the method further includes: The terminal receives downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal; wherein, the downlink OFDMA data information includes an OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover domain and ultra-high throughput signaling UHT-SIG_B.

25. The method according to claim 24, characterized in that, The terminal receives downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal, specifically including: The terminal receives the destination terminal address corresponding to the OFDMA data sent by the access point; The terminal determines whether its own address matches the destination terminal address; If so, the terminal receives the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal.

26. The method according to claim 25, characterized in that, The OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA ACK request or an OFDMA block acknowledgment (BA) request. The OFDMA ACK request or OFDMA BA request instructs the terminal to send an ACK response or BA response to the access point in OFDMA mode. The OFDMA physical layer signaling also instructs the terminal to send an ACK response or BA response to the access point via a sub-channel allocated to it. After receiving the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal, the terminal further includes: The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

27. The method according to claim 25, characterized in that, The OFDMA physical layer signaling is used to indicate the sub-channel corresponding to the terminal allocated for sending an ACK response or BA response to the access point. After the terminal receives downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal, the following further steps are included: The terminal receives an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode. The terminal transmits data to the access point on its corresponding sub-channel using OFDMA mode. ACK response or BA response.

28. The method according to any one of claims 18-21, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to send an ACK response or a BA response to the access point via the allocated sub-channel. The terminal then receives the OFDMA physical layer signaling sent by the access point, including: The terminal receives multi-user multiple-input multiple-output (MU-MIMO) data information sent by the access point; wherein, the MU-MIMO data information carries the OFDMA physical layer signaling; After the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

29. The method according to any one of claims 18-21, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK or BA response to the access point for the sub-channel corresponding to the terminal; then the terminal receives the OFDMA physical layer signaling sent by the access point, including: The terminal receives MU-MIMO data information sent by the access point; wherein the MU-MIMO data information carries the OFDMA physical layer signaling; The terminal receives an ACK request frame or a BA request frame sent by the access point; wherein, the The ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode. After the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

30. The method according to any one of claims 18-21, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK or BA response to the access point for the sub-channel corresponding to the terminal; then the terminal receives the OFDMA physical layer signaling sent by the access point, including: The terminal receives MU-MIMO data information sent by the access point; The terminal receives an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode; the ACK request frame or BA request frame carries the OFDMA physical layer signaling. After the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

31. The method according to any one of claims 18-21, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to use the sub-channel allocated to the access point for sending the ACK response or BA response. After determining the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, the process further includes: the terminal receiving OFDMA+MU-MIMO data information sent by the access point on the sub-channel corresponding to the terminal. The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

32. The method according to any one of claims 18-21, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel corresponding to the terminal that is allocated to send an ACK response or BA response to the access point; then, after the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal receives OFDMA+MU-MIMO data information sent by the access point on the sub-channel corresponding to the terminal; the terminal receives an ACK request frame or a BA request frame sent by the access point; wherein, the ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or a BA response to the access point in OFDMA mode. The terminal uses OFDMA mode to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal.

33. The method according to claims 18-23, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal on the sub-channel allocated for sending uplink OFDMA data information to the access point; before the terminal receives the OFDMA physical layer signaling sent by the access point, it further includes: The terminal sends an uplink transmission frame to the access point; After the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal uses OFDMA mode to send the uplink OFDMA data information to the access point on the sub-channel corresponding to the terminal.

34. The method according to claim 33, characterized in that, The uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request. The OFDMA ACK request or OFDMA BA request is further used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode. After the terminal sends the uplink OFDMA data information to the access point on the sub-channel corresponding to the terminal, the process further includes: The terminal receives the uplink signal sent by the access point on the sub-channel corresponding to the terminal. The ACK or BA response corresponding to the 0FDMA data information.

35. The method according to claims 18-23, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel corresponding to the terminal that is allocated for sending uplink OFDMA data information to the access point; then, after the terminal determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, it further includes: The terminal uses OFDMA mode to send the uplink OFDMA data information to the access point on the sub-channel corresponding to the terminal.

36. An access point, characterized in that, include: The transmitting module is configured to transmit Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal. The OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, so that the terminal can determine the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling. The OFDMA physical layer signaling includes the identifier of the terminal and sub-channel information corresponding to the identifier of the terminal.

37. The access point according to claim 36, characterized in that, The terminal identifier is the identifier of one or more terminal groups, each terminal group including at least one terminal; the sub-channel information includes uplink sub-channels, downlink sub-channels, or bidirectional uplink and downlink sub-channels, then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink / downlink sub-channel; wherein, the terminal group corresponds to the sub-channel.

38. The access point according to claim 37, characterized in that, The sending module is further configured to send the mapping relationship between the identifier of the terminal group and the address of the terminal to the terminal before sending OFDMA physical layer signaling to the terminal, so that the terminal knows the terminal group to which it belongs.

39. The access point according to claim 36, characterized in that, The identifier of the terminal is the identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink and downlink sub-channel; wherein, each terminal in the terminal group corresponds one-to-one with the sub-channel.

40. The access point according to any one of claims 36-39, characterized in that, The transmitting module is specifically configured to transmit an Orthogonal Frequency Division Multiplexing (OFDM) preamble to the terminal; wherein the OFDM preamble carries the OFDMA physical layer signaling; or, specifically configured to transmit a Null Data Packet Advertisement (NDPA) frame to the terminal; wherein the NDPA frame carries the OFDMA physical layer signaling.

41. The access point according to any one of claims 36-39, characterized in that, The transmitting module is further configured to transmit an NDPA frame and an OFDM preamble to the terminal; wherein the NDPA frame carries the terminal's identifier in the OFDMA physical layer signaling, and the OFDM preamble carries sub-channel information corresponding to the terminal's identifier in the OFDMA physical layer signaling; or, the NDPA frame carries sub-channel information corresponding to the terminal's identifier in the OFDMA physical layer signaling, and the OFDM preamble carries the terminal's identifier in the OFDMA physical layer signaling.

42. The access point according to any one of claims 36-41, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated for receiving downlink OFDMA data. The transmitting module is further configured to, after sending the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal, transmit downlink OFDMA data information on the corresponding sub-channel of the terminal using OFDMA mode. The downlink OFDMA data information includes an OFDMA preamble and OFDMA data. The OFDMA preamble includes a handover domain and Ultra High Throughput Signaling (UHT-SIG_B).

43. The access point according to claim 42, characterized in that, The OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA ACK request or an OFDMA Block Acknowledgment (BA) request. The OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode. The OFDMA physical layer signaling also instructs the sub-channel corresponding to the terminal allocated to the access point to send an ACK response or BA response. The access point further includes: The receiving module is configured to receive an ACK response or BA response sent by the terminal in the corresponding sub-channel using the OFDMA mode after the sending module sends the downlink OFDMA data information in the sub-channel corresponding to the terminal using the OFDMA mode.

44. The access point according to claim 42, characterized in that, The OFDMA physical layer signaling is used to indicate the sub-channel corresponding to the terminal allocated to the access point for sending an ACK response or a BA response; then the sending module is further used to send an ACK request frame or a BA request frame to the terminal after sending the downlink OFDMA data information on the sub-channel corresponding to the terminal. The ACK request frame or BA request frame includes a dedicated information bit, which is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode. The receiving module is also used to receive the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

45. The access point according to any one of claims 36-39, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to use the sub-channel allocated for sending an ACK response or a BA response to the access point. The transmitting module is specifically used to send MU-MIMO data information to the terminal in a multi-user multiple-input multiple-output (MU-MIMO) mode, wherein the MU-MIMO data information carries the OFDMA physical layer signaling. The receiving module is further configured to receive an ACK response or BA response sent by the terminal in the corresponding sub-channel using OFDMA mode after the sending module sends the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal.

46. ​​The access point according to any one of claims 36-39, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point via the sub-channel corresponding to the terminal; then the sending module is specifically used to send MU-MIMO data information to the terminal in MU-MIMO mode; wherein the MU-MIMO data information carries the OFDMA physical layer signaling; and to send an ACK request frame or BA request frame to the terminal; wherein the ACK request frame or BA request frame includes dedicated information bits, which are used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode; The receiving module is further configured to receive an ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel after the sending module sends the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal.

47. The access point according to any one of claims 36-39, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point on the corresponding sub-channel. The sending module is specifically used to send MU-MIMO data information to the terminal in MU-MIMO mode and to send an ACK request frame or BA request frame to the terminal. The ACK request frame or BA request frame includes dedicated information bits, which instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode. The ACK request frame or BA request frame carries the OFDMA physical layer signaling. The receiving module is further used to receive the ACK response or BA response sent by the terminal in OFDMA mode on the corresponding sub-channel after the sending module sends the OFDMA physical layer signaling to the terminal.

48. The access point according to any one of claims 36-39, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to send an ACK response or a BA response to the access point via the allocated sub-channel. The transmitting module is further configured to, after sending the OFDMA physical layer signaling to the terminal, send OFDMA+MU-MIMO data information to the terminal on the corresponding sub-channel in OFDMA mode. The receiving module is further configured to receive the ACK response or BA response sent by the terminal on the corresponding sub-channel in OFDMA mode.

49. The access point according to any one of claims 36-39, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point via the sub-channel corresponding to the terminal. The transmitting module is further configured to, after sending the OFDMA physical layer signaling to the terminal, use OFDMA+MU-MIMO mode to send OFDMA+MU-MIMO data information to the terminal on the sub-channel corresponding to the terminal; and send an ACK request frame or BA request frame to the terminal. The ACK request frame or BA request frame includes dedicated information bits, which are used to instruct the terminal to send an ACK response or BA response to the access point using OFDMA mode. The receiving module is further configured to receive an ACK response or a BA response sent by the terminal in OFDMA mode on the corresponding sub-channel.

50. The access point according to any one of claims 36-41, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal on the sub-channel corresponding to the terminal that is allocated for sending uplink OFDMA data information to the access point; The receiving module is further configured to receive the uplink transmission frame sent by the terminal before the sending module sends the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal; and after the sending module sends the OFDMA physical layer signaling to the terminal, receive the uplink OFDMA data information sent by the terminal in OFDMA mode on the corresponding sub-channel.

51. The access point according to claim 50, characterized in that, The uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request. The OFDMA ACK request or OFDMA BA request is also used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode. Then, the sending module is further used to send an ACK response or a BA response corresponding to the uplink OFDMA data information in OFDMA mode on the sub-channel corresponding to the terminal after the receiving module receives the uplink OFDMA data information sent by the terminal on the corresponding sub-channel.

52. The access point according to any one of claims 36-41, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to allocate a sub-channel corresponding to the terminal for sending uplink OFDMA data information to the access point; then the receiving module is further used to receive the uplink OFDMA data information sent by the terminal in OFDMA mode on the corresponding sub-channel after the sending module sends the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling to the terminal.

53. A terminal, characterized in that, include: A receiving module is configured to receive Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by an access point, wherein the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated by the access point to the terminal; wherein the OFDMA physical layer signaling includes the identifier of the terminal and sub-channel information corresponding to the identifier of the terminal; The determination module is used to determine the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling.

54. The terminal according to claim 53, characterized in that, The terminal identifier is the identifier of one or more terminal groups, each terminal group including at least one terminal; the sub-channel information includes uplink sub-channels, downlink sub-channels, or bidirectional uplink and downlink sub-channels, then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink / downlink sub-channel; wherein, the terminal group corresponds to the sub-channel.

55. The terminal according to claim 54, characterized in that, The receiving module is further configured to receive, before receiving the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer signaling sent by the access point, the mapping relationship between the identifier of the terminal group and the address of the terminal; then the determining module is specifically configured to determine that it is located in the terminal group according to the mapping relationship, and then determine the sub-channel corresponding to the terminal group as the sub-channel corresponding to the terminal.

56. The terminal according to claim 53, characterized in that, The identifier of the terminal is the identifier of a terminal group, and the terminal group includes at least two terminals; then the OFDMA physical layer signaling is used to indicate to the terminal the sub-channel allocated to the terminal, including: The OFDMA physical layer signaling is used to indicate to each terminal in the terminal group that the allocated sub-channel is an uplink sub-channel, a downlink sub-channel, or a bidirectional uplink and downlink sub-channel; wherein, each terminal in the terminal group corresponds one-to-one with the sub-channel.

57. The terminal according to any one of claims 53-56, characterized in that, The receiving module is specifically configured to receive an Orthogonal Frequency Division Multiplexing (OFDM) preamble sent by the access point; wherein the OFDM preamble carries the OFDMA physical layer signaling; or, specifically configured to receive an Empty Data Packet Advertisement (NDPA) frame sent by the access point; wherein the NDPA frame carries the OFDMA physical layer signaling.

58. The terminal according to any one of claims 53-56, characterized in that, The receiving module is further configured to receive an NDPA frame and an OFDM preamble sent by the access point; wherein the NDPA frame carries the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries sub-channel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling; or, it is further configured to receive an NDPA frame and an OFDM preamble sent by the access point; wherein the NDPA frame carries sub-channel information corresponding to the identifier of the terminal in the OFDMA physical layer signaling, and the OFDM preamble carries the identifier of the terminal in the OFDMA physical layer signaling.

59. The terminal according to any one of claims 53-58, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated by the access point for receiving downlink OFDMA data. The receiving module is further configured to receive downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling. The downlink OFDMA data information includes an OFDMA preamble and OFDMA data, and the OFDMA preamble includes a handover domain and Ultra High Throughput Signaling (UHT-SIG_B).

60. The terminal according to claim 59, characterized in that, The receiving module includes: a receiving unit, configured to receive the destination terminal address corresponding to the OFDMA data sent by the access point; The determination unit is used to determine whether it matches the address of the destination terminal; if so, it instructs the receiving unit to receive the downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal.

61. The terminal according to claim 60, characterized in that, The OFDMA physical layer signaling or the downlink OFDMA data information carries an OFDMA ACK request or an OFDMA Block Acknowledgment (BA) request. The OFDMA ACK request or OFDMA BA request is used to instruct the terminal to send an ACK response or BA response to the access point in OFDMA mode. The OFDMA physical layer signaling is also used to instruct the sub-channel allocated to the terminal for sending an ACK response or BA response to the access point. The terminal further includes: The transmitting module is configured to, after the receiving module receives downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal, send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal in OFDMA mode.

62. The terminal according to claim 60, characterized in that, The OFDMA physical layer signaling is also used to indicate the sub-channel corresponding to the terminal that is allocated to send an ACK response or BA response to the access point; then the receiving module is further used to receive an ACK request frame or BA request frame sent by the access point after receiving downlink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal; wherein the ACK request frame or BA request frame includes dedicated information bits, which are used to indicate that the terminal sends an ACK response or BA response to the access point in OFDMA mode. The sending module is further configured to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal using OFDMA mode.

63. The terminal according to any one of claims 53-56, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to use the sub-channel allocated to the terminal for sending an ACK response or a BA response to the access point. The receiving module is specifically used to receive MU-MIMO data information sent by the access point. The sending module is further configured to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal in OFDMA mode after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling.

64. The terminal according to any one of claims 53-56, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point via the sub-channel corresponding to the terminal. The receiving module is specifically used to receive MU-MIMO data information sent by the access point, wherein the MU-MIMO data information carries the OFDMA physical layer signaling; and to receive an ACK request frame or BA request frame sent by the access point, wherein the ACK request frame or BA request frame includes dedicated information bits, which are used to instruct the terminal to send an ACK response or BA response to the access point using OFDMA mode. The sending module is further configured to, after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal in OFDMA mode.

65. The terminal according to any one of claims 53-56, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point via the sub-channel corresponding to the terminal. The receiving module is specifically used to receive MU-MIMO data information sent by the access point and to receive an ACK request frame or BA request frame sent by the access point. The ACK request frame or BA request frame includes dedicated information bits, which instruct the terminal to send an ACK response or BA response to the access point using OFDMA mode. The ACK request frame or BA request frame carries the OFDMA physical layer signaling. The sending module is further configured to, after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal in OFDMA mode.

66. The terminal according to any one of claims 53-56, characterized in that, The OFDMA physical layer signaling carries an OFDMA ACK request or an OFDMA BA request, which instructs the terminal to send an ACK response or a BA response to the access point in OFDMA mode. Specifically, the OFDMA physical layer signaling instructs the terminal to use the sub-channel corresponding to the terminal that is allocated to send an ACK response or a BA response to the access point. The receiving module is further configured to receive OFDMA+MU-MIMO data information sent by the access point on the sub-channel corresponding to the terminal after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling. The sending module is also configured to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal using OFDMA mode.

67. The terminal according to any one of claims 53-56, characterized in that, The OFDMA physical layer signaling is specifically used to instruct the terminal to send an ACK response or BA response to the access point via the sub-channel assigned to the terminal. The receiving module is further configured to, after the determining module determines the sub-channel corresponding to the terminal based on the OFDMA physical layer signaling, receive OFDMA+MU-MIMO data information sent by the access point on the sub-channel corresponding to the terminal; and receive an ACK request frame or BA request frame sent by the access point; wherein the ACK request frame or BA request frame includes dedicated information bits, which are used to instruct the terminal to send an ACK response or BA response to the access point using OFDMA mode. The sending module is also configured to send an ACK response or a BA response to the access point on the sub-channel corresponding to the terminal using OFDMA mode.

68. The terminal according to any one of claims 53-58, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel allocated for sending uplink OFDMA data information to the access point; then the transmitting module is further used to send an uplink transmission frame to the access point before the receiving module receives the OFDMA physical layer signaling sent by the access point; and is further used to send the uplink OFDMA data information to the access point on the sub-channel corresponding to the terminal in OFDMA mode after the determining module determines the sub-channel corresponding to the terminal according to the OFDMA physical layer signaling.

69. The terminal according to claim 68, characterized in that, The uplink OFDMA data information carries an OFDMA ACK request or an OFDMA BA request. The OFDMA ACK request or OFDMA BA request is also used to instruct the access point to send an ACK response or a BA response to the terminal in OFDMA mode. Then, the receiving module is further used to receive the ACK response or BA response corresponding to the uplink OFDMA data information sent by the access point on the sub-channel corresponding to the terminal after the sending module sends the uplink OFDMA data information to the access point.

70. The terminal according to any one of claims 53-58, characterized in that, The OFDMA physical layer signaling is specifically used to indicate to the terminal the sub-channel corresponding to the terminal that is allocated for sending uplink OFDMA data information to the access point; then the sending module is further used to send the uplink OFDMA data information to the access point on the sub-channel corresponding to the terminal in OFDMA mode after the determining module determines the sub-channel corresponding to the terminal according to the OFDMA physical layer signaling.

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