Data transmission methods and related equipment

Abstract

The present invention provides a signal transmission method and data transmission equipment applicable to wireless local area networks. [Solution] The network device generates a first physical layer protocol data unit (PPDU) and transmits the encoded first PPDU to the station STA. The first PPDU includes a first universal signaling field (U-SIG field) and a first ultra-high throughput signaling field (EHT-SIG field), wherein the sum of the number of information bits in the first U-SIG field and the first EHT-SIG field is 78 information bits or less, and at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indicator field, which is used to uniquely identify a station. In this way, the indicator overhead can be reduced, and the first U-SIG field and the first EHT-SIG field can carry more information.

Description

Technical Field

[0001] This application relates to the field of wireless local area network technology, and particularly to data transmission methods and related devices.

Background Art

[0002] In related technologies, in a scenario where a network device performs single-user (SU) transmission, a physical protocol data unit (PPDU) transmitted by the network device to a station (STA) includes a legacy preamble, a high-efficiency signaling field A (HE-SIG-A), and data. In a scenario where the network device performs multi-user (MU) transmission, a physical protocol data unit (PPDU) transmitted by the network device to a station (STA) includes a legacy preamble, HE-SIG-B, and data. HE-SIG-A and HE-SIG-B indicate signaling information necessary for demodulating subsequent data fields. It can be seen that HE-SIG-B is included only in the PPDU in the MU transmission scenario among the PPDUs transmitted by the network device. As a result, the STA needs to use two significantly different receiving policies to receive the PPDUs in the SU transmission scenario and the MU transmission scenario. Also, there is a limit to the number of bits of HE-SIG-A. As a result, in the SU scenario, the information transmitted by HE-SIG-A is limited.

Summary of the Invention

[0003] Embodiments of this application provide a data transmission method and related devices, thereby enabling the signal field in the PPDU to transmit more information.

[0004] According to a first aspect, an implementation of this application provides a data transmission method. The method includes the following.

[0005] The network device generates a first physical layer protocol data unit (PPDU), which includes a first universal signaling field (U-SIG field) and a first ultra-high throughput signaling field (EHT-SIG field), wherein the sum of the number of information bits in the first U-SIG field and the first EHT-SIG field is 78 information bits or less.

[0006] The network device transmits the encoded first PPDU to the station.

[0007] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0008] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier field, which is used to uniquely identify a station, for example, which is used to uniquely identify a station in a Basic Service Set (BSS) that includes the network device. The first U-SIG field or the first EHT-SIG field includes a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit. Or, The first demodulation instruction field includes a space reuse instruction field.

[0009] Thus, the technical solution of the implementation of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces the instruction overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the instruction overhead.

[0010] It should be noted that the names of the first EHT-SIG field and the second EHT-SIG field in this implementation of the Application are determined in accordance with the 802.11be standard. The names of the first EHT-SIG field and the second EHT-SIG field in this implementation of the Application may also be the names of the corresponding SIG fields in other standard versions. The names of the first EHT-SIG field and the second EHT-SIG field in this implementation of the Application are not limited to SIG fields related to the 802.11be standard. The first EHT-SIG field and the second EHT-SIG field in this implementation of the Application may be used to refer to SIG fields related to any standard version.

[0011] Specifically, in a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying one station in the basic service set, including the network device. In this way, the identifier indicator field included in the encoded first PPDU can uniquely identify one STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is to be transmitted to the STA without continuing to receive subsequent preamble data fields. This reduces the power consumption of the station. Furthermore, even if the data field following the first U-SIG field and the data field following the first EHT-SIG field are not received correctly, the station can determine that the first PPDU was transmitted to the station based on the first U-SIG field and the first EHT-SIG field, and the station can perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. In addition, a third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing the transmission. This helps the third-party device perform scheduling.

[0012] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, the implementation of the present invention has the PPDU format indicator field occupy one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0013] The PPDU format indicator field may indicate the PPDU format and indicate that the transmission mode is SU or MU transmission. In this way, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU transmission or MU transmission is to be performed and use the corresponding receive policy.

[0014] For example, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple (MU non-OFDMA), or MU OFDMA, further include information indicating trigger-based (TB) frames, and further include information indicating whether puncturing is performed.

[0015] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0016] Optionally, the length of the space reuse instruction field is 2 information bits. The space reuse instruction field consists of the following four items: The field may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0017] In some implementations, the length of the second U-SIG field of an unencoded second PPDU is equal to the number of information bits in the first U-SIG field, and both the number of information bits in the first U-SIG field and the number of information bits in the second U-SIG field are 52 information bits or less. The first PPDU is transmitted by the network device to one station when the network device performs single-user transmission, and the second PPDU is transmitted by the network device to multiple stations when the network device performs multi-user transmission. In this case, the number of information bits in the first U-SIG field of the first PPDU transmitted to the station by the network device in the SU scenario is equal to the number of information bits in the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the receive policy of the station receiving the first U-SIG field in the SU scenario and the receive policy of the station receiving the second U-SIG field in the MU scenario, helping the station receive the U-SIG field in different scenarios.

[0018] In some implementations, the first U-SIG field and the first EHT-SIG field include an identifier indicator field. The identifier indicator field includes a first indicator subfield and a second indicator subfield. The first U-SIG field includes the first indicator subfield, and the first EHT-SIG field includes the second indicator subfield. In this way, since it is necessary to indicate a unique station identifier by making sufficient use of the idle information bits of the first U-SIG field and the first EHT-SIG field, an increase in the number of information bits of the first U-SIG field or the first EHT-SIG field is avoided.

[0019] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the first portion of the information bits. This helps reduce the difference in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0020] In some implementations, the field type of the first (N-1) information bits of the first U-SIG field and the field type of the first (N-1) information bits of the second U-SIG field are as follows: It includes one or more of the following: physical layer version indicator field, uplink / downlink indicator field, basic service set color indicator field, transmission opportunity indicator field, bandwidth indicator field, PPDU format indicator field, space-time block coding indicator field, space reuse indicator field, protection interval and ultra-high throughput length training field size indicator field, low density parity check additional symbol segment indicator field, pre-forward error correction padding factor indicator field, packet expansion ambiguity indicator field, and preamble puncturing indicator field.

[0021] In some implementations, the second EHT-SIG field of the unencoded second PPDU includes a station identifier indicator field, and the field type of the field following the second indicator subfield in the first EHT-SIG field is the same as the field type of the field following the station identifier indicator field in the second EHT-SIG field. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the information bits following the station identifier indicator field. This helps reduce the differences in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0022] In some implementations, the field type of the field following the second indicator subfield in the first EHT-SIG field, and the field type of the field following the station identifier indicator field in the second EHT-SIG field, are as follows: It includes one or more of the following: a field indicating the number of time-space streams, the mid-amble period, and Doppler; a beamforming indicator field; a beam modification indicator field; a field indicating the modulation and coding scheme and whether dual-carrier modulation is used; and a coding indicator field.

[0023] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, and the field type of the field after the Nth information bit of the second U-SIG field and the field type of the field before the station identifier instruction field of the second EHT-SIG field are as follows: The system includes one or more of the following fields: a field indicating the number of EHT-SIG field symbols or the number of multi-user multi-input multi-output users; a field indicating the modulation and coding scheme of the EHT-SIG field and whether dual-carrier modulation is used; a field indicating the number of ultra-high throughput long training field (EHT-LTF) symbols, the mid-amble period, and the Doppler; a resource unit allocation instruction field; a preamble puncturing instruction field; and a Center 26-tone Resource Allocation (Center 26-tone RU) instruction field.

[0024] In some implementations, the first string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the first string group containing the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0025] Thus, in the foregoing method, information bits are saved, and the first EHT-SIG field and the second EHT-SIG field can carry more information.

[0026] According to a second aspect, an implementation of the present application provides a data transmission method. The method includes the following. A network device generates a PPDU, and the network device transmits the PPDU locally. The PPDU includes an EHT-SIG field, and the EHT-SIG field includes a field indicating the number of EHT-LTF symbols, a midamble period, and a Doppler. The field indicating the number of EHT-LTF symbols, the midamble period, and the Doppler is a first string, and a first string group including the first string indicates that there is no Doppler. The first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The field indicating the number of EHT-LTF symbols, the midamble period, and the Doppler is a second string, and a second string group including the second string indicates that there is a Doppler and the midamble period is a first period. The second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The field indicating the number of EHT-LTF symbols, the midamble period, and the Doppler is a third string, and a third string group including the third string indicates that there is a Doppler and the midamble period is a second period. The third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols. In this case, in order to indicate the Doppler and the midamble period, a string group including a string is used, and the value of the string indicates the number of EHT-LTF symbols. Thereby, information bits indicating the Doppler and the midamble period can be saved.

[0027] According to a third aspect, the implementation of the present application provides a data transmission method. The method includes the following. A network device generates a PPDU, and the network device locally transmits the PPDU. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The j-th information bit from the i-th information bit of the first content channel carries a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, or the j-th information bit from the i-th information bit of the first content channel carries a resource unit allocation indication field and a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel. Both i and j are positive integers, and i < j. The field of the first (i - 1) information bits of the first content channel and the field of the first (i - 1) information bits of the second content channel can be understood as a U-SIG overflow field. In this case, since the U-SIG overflow field is replicated in the first content channel and the second content channel, the probability of correct reception by the station can be increased.

[0028] According to a fourth aspect, an implementation of the present application provides a data transmission method. The method includes the following. A network device generates a PPDU, and the network device transmits the PPDU locally. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The j-th information bit from the i-th information bit of the first content channel carries a user field, and the j-th information bit from the i-th information bit of the second content channel carries a padding field, where both i and j are positive integers and i < j. Thus, the length of the first content channel is the same as the length of the second content channel. This helps the local device receive the first content channel and the second content channel. Also, since the local device does not need to read this padding field, the reading process of the local device can be simplified.

[0029] According to a fifth aspect, an implementation of the present application provides a fifth data transmission method. The method includes the following. A network device generates a PPDU, and the network device transmits the PPDU locally. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The first content channel includes a first sub-user field, the second content channel includes a second sub-user field, and the user field of the first user includes the first sub-user field and the second sub-user field. That is, in this implementation, a part of the user field of the same user is transmitted through the first content channel, and another part is transmitted through the second content channel. Thereby, the number of information bits for transmitting the user field can be increased, and more information can be transmitted.

[0030] According to a sixth aspect, an implementation of the present invention provides a data transmission method. The method includes: a network device generates a PPDU, and the network device transmits the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries a first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries a second content channel of the EHT-SIG field. In this way, the user field of the first content channel is the same as the user field of the second content channel. In this case, since the user field is duplicated in the first and second content channels, the probability of correct reception by the station can be increased and reliability can be improved.

[0031] According to the seventh aspect, the implementation of the present application provides a data transmission method. The method includes the following:

[0032] The station receives the first PPDU transmitted by the network device, The station decodes the first PPDU in order to obtain the decoded first PPDU, The decoded first PPDU includes a first U-SIG field and a first EHT-SIG field, The sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less.

[0033] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0034] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier field, which is used to uniquely identify a station, for example, which is used to uniquely identify a station in a Basic Service Set (BSS) that includes the network device. The first U-SIG field or the first EHT-SIG field includes a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0035] Thus, the technical solution of the implementation of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces the instruction overhead. Furthermore, since the first U-SIG field and the first EHT-SIG field can carry more information without increasing the instruction overhead, the station can obtain more information from the first U-SIG field and the first EHT-SIG field.

[0036] Specifically, in a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying one station in the basic service set, including the network device. In this way, the identifier indicator field included in the encoded first PPDU can uniquely identify one STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is to be transmitted to the STA without continuing to receive subsequent preamble data fields. This reduces the power consumption of the station. Furthermore, even if the data field following the first U-SIG field and the data field following the first EHT-SIG field are not received correctly, the station can determine that the first PPDU was transmitted to the station based on the first U-SIG field and the first EHT-SIG field, and the station can perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. In addition, a third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing the transmission. This helps the third-party device perform scheduling.

[0037] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, the implementation of the present invention has the PPDU format indicator field occupy one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0038] The PPDU format indicator field may indicate the PPDU format and indicate that the transmission mode is SU or MU transmission. In this way, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU transmission or MU transmission is to be performed and use the corresponding receive policy.

[0039] For example, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple (MU non-OFDMA), or MU OFDMA, further include information indicating trigger-based (TB) frames, and further include information indicating whether puncturing is performed.

[0040] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0041] Optionally, the length of the space reuse instruction field is 2 information bits. The space reuse instruction field consists of the following four items: The field may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0042] In some implementations, the length of the second U-SIG field in the decoded second PPDU is equal to the number of information bits in the first U-SIG field, and both the number of information bits in the first U-SIG field and the number of information bits in the second U-SIG field are 52 information bits or less. The first PPDU is transmitted by the network device to one station when the network device is performing single-user transmission, and the second PPDU is transmitted by the network device to multiple stations when the network device is performing multi-user transmission. In this case, the number of information bits in the first U-SIG field of the first PPDU transmitted to the station by the network device in the SU scenario is equal to the number of information bits in the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the receive policy of the station receiving the first U-SIG field in the SU scenario and the receive policy of the station receiving the second U-SIG field in the MU scenario, helping the station receive the U-SIG field in different scenarios.

[0043] In some implementations, the first U-SIG field and the first EHT-SIG field include an identifier indicator field. The identifier indicator field includes a first indicator subfield and a second indicator subfield. The first U-SIG field includes the first indicator subfield, and the first EHT-SIG field includes the second indicator subfield. In this way, since it is necessary to indicate a unique station identifier by making sufficient use of the idle information bits of the first U-SIG field and the first EHT-SIG field, an increase in the number of information bits of the first U-SIG field or the first EHT-SIG field is avoided.

[0044] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the first portion of the information bits. This helps reduce the difference in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0045] In some implementations, the field type of the first (N-1) information bits of the first U-SIG field and the field type of the first (N-1) information bits of the second U-SIG field are as follows: It includes one or more of the following: physical layer version indicator field, uplink / downlink indicator field, basic service set color indicator field, transmission opportunity indicator field, bandwidth indicator field, PPDU format indicator field, space-time block coding indicator field, space reuse indicator field, protection interval and ultra-high throughput length training field size indicator field, low density parity check additional symbol segment indicator field, pre-forward error correction padding factor indicator field, packet expansion ambiguity indicator field, and preamble puncturing indicator field.

[0046] In some implementations, the second EHT-SIG field of the unencoded second PPDU includes a station identifier indicator field, and the field type of the field following the second indicator subfield in the first EHT-SIG field is the same as the field type of the field following the station identifier indicator field in the second EHT-SIG field. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the information bits following the station identifier indicator field. This helps reduce the differences in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0047] In some implementations, the field type of the field following the second indicator subfield in the first EHT-SIG field, and the field type of the field following the station identifier indicator field in the second EHT-SIG field, are as follows: It includes one or more of the following: a field indicating the number of time-space streams, the mid-amble period, and Doppler; a beamforming indicator field; a beam modification indicator field; a field indicating the modulation and coding scheme and whether dual-carrier modulation is used; and a coding indicator field.

[0048] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, and the field type of the field after the Nth information bit of the second U-SIG field and the field type of the field before the station identifier instruction field of the second EHT-SIG field are as follows: The system includes one or more of the following fields: a field indicating the number of EHT-SIG field symbols or the number of multi-user multi-input multi-output users; a field indicating the modulation and coding scheme of the EHT-SIG field and whether dual-carrier modulation is used; a field indicating the number of ultra-high throughput long training field (EHT-LTF) symbols, the mid-amble period, and the Doppler; a resource unit allocation instruction field; a preamble puncturing instruction field; and a Center 26-tone Resource Allocation (Center 26-tone RU) instruction field.

[0049] In some implementations, the first string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the first string group containing the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0050] Thus, in the method described above, information bits are saved, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information, and enabling the station to acquire more information.

[0051] According to the eighth aspect, the implementation of the present application further provides a data transmission method. The method includes the following:

[0052] The station receives the PPDU transmitted by the network device.

[0053] The PPDU includes an EHT-SIG field, which includes fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler constitute a first string, and the first string group including the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0054] Thus, the station determines the Doppler and midamble period based on a string group including a string, and indicates the number of EHT-LTF symbols based on the value of the string. In this case, the number of information bits of the field indicating the number of EHT-LTF symbols, Doppler, and midamble period is reduced. Thus, since the PPDU can carry more other information, the station can obtain more information from the PPDU.

[0055] According to a ninth aspect, the implementation of the present application further provides a data transmission method. The method includes the following. A station receives a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The j-th information bit from the i-th information bit of the first content channel carries a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, or the j-th information bit from the i-th information bit of the first content channel carries a resource unit allocation indication field and a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel. Both i and j are positive integers, and i < j. The field of the first (i - 1) information bits of the first content channel and the field of the first (i - 1) information bits of the second content channel can be understood as a U-SIG overflow field. In this case, since the U-SIG overflow field is replicated in the first content channel and the second content channel, the probability of correct reception of the station can be increased.

[0056] According to the 10th aspect, the implementation of the present application further provides a data transmission method. The method includes the following. A station receives a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The j-th information bit from the i-th information bit of the first content channel carries the user field, and the j-th information bit from the i-th information bit of the second content channel carries the padding field, where both i and j are positive integers and i < j. Thus, the length of the first content channel is the same as the length of the second content channel. This helps the station receive the first content channel and the second content channel. Also, since the station does not need to read this padding field, the reading process of the station can be simplified.

[0057] According to the 11th aspect, the implementation of the present application further provides a data transmission method. The method includes the following. A station receives a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field. The first content channel includes a first sub-user field, the second content channel includes a second sub-user field, and the user field of the first user includes the first sub-user field and the second sub-user field. That is, in this implementation, a part of the user field of the same user is transmitted through the first content channel, and the other part is transmitted through the second content channel. Thereby, the number of information bits for transmitting the user field can be increased, and more information can be transmitted.

[0058] According to a twelfth aspect, an implementation of the present invention further provides a data transmission method. The method includes: A station receives a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries a first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries a second content channel of the EHT-SIG field. In this way, the user field of the first content channel is the same as the user field of the second content channel. In this case, since the user field is duplicated in the first and second content channels, the probability of correct reception by the station can be increased and reliability can be improved.

[0059] According to a thirteenth aspect, the implementation of the present application further provides a network device. The network device is A processing unit configured to generate a first PPDU, wherein the first PPDU includes a first universal signaling field (U-SIG field) and a first ultra-high throughput signaling field (EHT-SIG field), and the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. A transceiver unit configured to transmit an encoded first PPDU to the station, Includes.

[0060] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0061] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier field, which is used to uniquely identify a station, for example, which is used to uniquely identify a station in a Basic Service Set (BSS) that includes the network device. The first U-SIG field or the first EHT-SIG field includes a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0062] Thus, the technical solution of the implementation of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces the instruction overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the instruction overhead.

[0063] In a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying one station in the basic service set, including the network device. Thus, the identifier indicator field included in the encoded first PPDU can uniquely identify one STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU has been transmitted to the STA without continuing to receive subsequent preamble data fields. This reduces the power consumption of the station. Also, even if the data fields following the first U-SIG field and the data fields following the first EHT-SIG field are not received correctly, the station can determine from the first U-SIG field and the first EHT-SIG field that the first PPDU has been transmitted to the station, so that the station can perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. Furthermore, a third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing the transmission. This helps the third-party device perform scheduling.

[0064] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, the implementation of the present invention has the PPDU format indicator field occupy one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0065] The PPDU format indicator field may indicate the PPDU format and indicate that the transmission mode is SU or MU transmission. In this way, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU transmission or MU transmission is to be performed and use the corresponding receive policy.

[0066] For example, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple (MU non-OFDMA), or MU OFDMA, further include information indicating trigger-based (TB) frames, and further include information indicating whether puncturing is performed.

[0067] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0068] Optionally, the length of the space reuse instruction field is 2 information bits. The space reuse instruction field consists of the following four items: The field may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0069] In some implementations, the length of the second U-SIG field of an unencoded second PPDU is equal to the number of information bits in the first U-SIG field, and both the number of information bits in the first U-SIG field and the number of information bits in the second U-SIG field are 52 information bits or less. The first PPDU is transmitted by the network device to one station when the network device performs single-user transmission, and the second PPDU is transmitted by the network device to multiple stations when the network device performs multi-user transmission. In this case, the number of information bits in the first U-SIG field of the first PPDU transmitted to the station by the network device in the SU scenario is equal to the number of information bits in the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the receive policy of the station receiving the first U-SIG field in the SU scenario and the receive policy of the station receiving the second U-SIG field in the MU scenario, helping the station receive the U-SIG field in different scenarios.

[0070] In some implementations, the first U-SIG field and the first EHT-SIG field include an identifier indicator field. The identifier indicator field includes a first indicator subfield and a second indicator subfield. The first U-SIG field includes the first indicator subfield, and the first EHT-SIG field includes the second indicator subfield. In this way, since it is necessary to indicate a unique station identifier by making sufficient use of the idle information bits of the first U-SIG field and the first EHT-SIG field, an increase in the number of information bits of the first U-SIG field or the first EHT-SIG field is avoided.

[0071] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the first portion of the information bits. This helps reduce the difference in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0072] In some implementations, the field type of the first (N-1) information bits of the first U-SIG field and the field type of the first (N-1) information bits of the second U-SIG field are as follows: It includes one or more of the following: physical layer version indicator field, uplink / downlink indicator field, basic service set color indicator field, transmission opportunity indicator field, bandwidth indicator field, PPDU format indicator field, space-time block coding indicator field, space reuse indicator field, protection interval and ultra-high throughput length training field size indicator field, low density parity check additional symbol segment indicator field, pre-forward error correction padding factor indicator field, packet expansion ambiguity indicator field, and preamble puncturing indicator field.

[0073] In some implementations, the second EHT-SIG field of the unencoded second PPDU includes a station identifier indicator field, and the field type of the field following the second indicator subfield in the first EHT-SIG field is the same as the field type of the field following the station identifier indicator field in the second EHT-SIG field. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the information bits following the station identifier indicator field. This helps reduce the differences in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0074] In some implementations, the field type of the field following the second indicator subfield in the first EHT-SIG field, and the field type of the field following the station identifier indicator field in the second EHT-SIG field, are as follows: It includes one or more of the following: a field indicating the number of time-space streams, the mid-amble period, and Doppler; a beamforming indicator field; a beam modification indicator field; a field indicating the modulation and coding scheme and whether dual-carrier modulation is used; and a coding indicator field.

[0075] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, and the field type of the field after the Nth information bit of the second U-SIG field and the field type of the field before the station identifier instruction field of the second EHT-SIG field are as follows: The system includes one or more of the following fields: a field indicating the number of EHT-SIG field symbols or the number of multi-user multi-input multi-output users; a field indicating the modulation and coding scheme of the EHT-SIG field and whether dual-carrier modulation is used; a field indicating the number of ultra-high throughput long training field (EHT-LTF) symbols, the mid-amble period, and the Doppler; a resource unit allocation instruction field; a preamble puncturing instruction field; and a Center 26-tone Resource Allocation (Center 26-tone RU) instruction field.

[0076] In some implementations, the first string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the first string group containing the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0077] Thus, the method described above saves information bits, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information.

[0078] According to a fourteenth aspect, the implementation of the present application further provides a network device. The network device is A processing unit configured to generate PPDUs, The system includes a transceiver unit configured to transmit the aforementioned PPDU to a station. The PPDU includes an EHT-SIG field, which includes fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler constitute a first string, and the first string group including the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0079] In this case, in order to indicate the Doppler and midamble period, a string group including a string is used, and the value of the string indicates the number of EHT-LTF symbols. Thereby, information bits indicating the Doppler and midamble period can be saved.

[0080] According to the 15th aspect, the implementation of the present application further provides a network device. The network device A processing unit configured to generate a PPDU, and A transceiver unit configured to transmit the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field.

[0081] The j-th information bit from the i-th information bit of the first content channel carries a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j, or The j-th information bit from the i-th information bit of the first content channel carries a resource unit allocation indication field and a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j.

[0082] The fields of the first (i-1) information bits of the first content channel and the fields of the first (i-1) information bits of the second content channel can be understood as a U-SIG overflow field. In this case, the U-SIG overflow field is duplicated in the first and second content channels, which can increase the probability of correct reception by the station.

[0083] According to the sixteenth aspect, the implementation of the present application further provides a network device. The network device is A processing unit configured to generate PPDUs, The system includes a transceiver unit configured to transmit the aforementioned PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0084] The j-th information bit from the i-th information bit of the first content channel carries the user field, and the j-th information bit from the i-th information bit of the second content channel carries the padding field, where both i and j are positive integers, i <jである。

[0085] Thus, the length of the first content channel is the same as the length of the second content channel. This helps the station receive both the first and second content channels. Furthermore, the station does not need to read this padding field, thus simplifying the station's reading process.

[0086] According to the 17th aspect, the implementation of the present application further provides a network device. The network device is A processing unit configured to generate PPDUs, The system includes a transceiver unit configured to transmit the aforementioned PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0087] The first content channel includes a first sub-user field, the second content channel includes a second sub-user field, and the first user's user field includes the first sub-user field and the second sub-user field.

[0088] In other words, in this implementation, a portion of the user field of the same user is transmitted through the first content channel, and the other portion is transmitted through the second content channel. This increases the number of information bits transmitted in the user field, allowing more information to be transmitted.

[0089] According to the 18th aspect, the implementation of the present application further provides a network device. The network device is A processing unit configured to generate PPDUs, The system includes a transceiver unit configured to transmit the aforementioned PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field. Thus, the user field of the first content channel is the same as the user field of the second content channel.

[0090] In this case, since the user field is duplicated in the first content channel and the second content channel, the probability of correct reception by the station can be increased, and reliability can be improved.

[0091] According to the 19th aspect, the implementation of the present application further provides a station. The station is A transceiver unit configured to receive the first PPDU transmitted by a network device, The system includes a processing unit configured to decode the first PPDU in order to obtain a decoded first PPDU. The decoded first PPDU includes a first U-SIG field and a first EHT-SIG field, The sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0092] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier field, which is used to uniquely identify a station, for example, which is used to uniquely identify a station in a Basic Service Set (BSS) that includes the network device. The first U-SIG field or the first EHT-SIG field includes a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0093] Thus, the technical solution of the implementation of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces the instruction overhead. Furthermore, since the first U-SIG field and the first EHT-SIG field can carry more information without increasing the instruction overhead, the station can obtain more information from the first U-SIG field and the first EHT-SIG field.

[0094] Specifically, in a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying a station. Thus, the identifier indicator field included in the encoded first PPDU can uniquely identify a single STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU has been transmitted to the STA without having to continue receiving subsequent preamble data fields. This reduces the station's power consumption. Furthermore, even if the data fields following the first U-SIG field and the data fields following the first EHT-SIG field are not received correctly, the station can determine from the first U-SIG field and the first EHT-SIG field that the first PPDU has been transmitted to the station, so that the station can perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. Furthermore, a third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing the transmission. This helps the third-party device perform scheduling.

[0095] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, the implementation of the present invention has the PPDU format indicator field occupy one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0096] The PPDU format indicator field may indicate the PPDU format and indicate that the transmission mode is SU or MU transmission. In this way, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU transmission or MU transmission is to be performed and use the corresponding receive policy.

[0097] For example, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple (MU non-OFDMA), or MU OFDMA, further include information indicating trigger-based (TB) frames, and further include information indicating whether puncturing is performed.

[0098] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0099] Optionally, the length of the space reuse instruction field is 2 information bits. The space reuse instruction field consists of the following four items: The field may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0100] In some implementations, the length of the second U-SIG field in the decoded second PPDU is equal to the number of information bits in the first U-SIG field, and both the number of information bits in the first U-SIG field and the number of information bits in the second U-SIG field are 52 information bits or less. The first PPDU is transmitted by the network device to one station when the network device performs single-user transmission, and the second PPDU is transmitted by the network device to multiple stations when the network device performs multi-user transmission. In this case, the number of information bits in the first U-SIG field of the first PPDU transmitted to the station by the network device in the SU scenario is equal to the number of information bits in the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the receive policy of the station receiving the first U-SIG field in the SU scenario and the receive policy of the station receiving the second U-SIG field in the MU scenario, helping the station receive the U-SIG field in different scenarios.

[0101] In some implementations, the first U-SIG field and the first EHT-SIG field include an identifier indicator field. The identifier indicator field includes a first indicator subfield and a second indicator subfield. The first U-SIG field includes the first indicator subfield, and the first EHT-SIG field includes the second indicator subfield. In this way, since it is necessary to indicate a unique station identifier by making sufficient use of the idle information bits of the first U-SIG field and the first EHT-SIG field, an increase in the number of information bits of the first U-SIG field or the first EHT-SIG field is avoided.

[0102] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the first portion of the information bits. This helps reduce the difference in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0103] In some implementations, the field type of the first (N-1) information bits of the first U-SIG field and the field type of the first (N-1) information bits of the second U-SIG field are as follows: It includes one or more of the following: physical layer version indicator field, uplink / downlink indicator field, basic service set color indicator field, transmission opportunity indicator field, bandwidth indicator field, PPDU format indicator field, space-time block coding indicator field, space reuse indicator field, protection interval and ultra-high throughput length training field size indicator field, low density parity check additional symbol segment indicator field, pre-forward error correction padding factor indicator field, packet expansion ambiguity indicator field, and preamble puncturing indicator field.

[0104] In some implementations, the second EHT-SIG field of the unencoded second PPDU includes a station identifier indicator field, and the field type of the field following the second indicator subfield in the first EHT-SIG field is the same as the field type of the field following the station identifier indicator field in the second EHT-SIG field. Thus, when the station receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the information bits following the station identifier indicator field. This helps reduce the differences in receiving policies for the station to receive the U-SIG field in different scenarios, and helps the station receive and demodulate the PPDU.

[0105] In some implementations, the field type of the field following the second indicator subfield in the first EHT-SIG field, and the field type of the field following the station identifier indicator field in the second EHT-SIG field, are as follows: It includes one or more of the following: a field indicating the number of time-space streams, the mid-amble period, and Doppler; a beamforming indicator field; a beam modification indicator field; a field indicating the modulation and coding scheme and whether dual-carrier modulation is used; and a coding indicator field.

[0106] In some implementations, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, and the field type of the field after the Nth information bit of the second U-SIG field and the field type of the field before the station identifier instruction field of the second EHT-SIG field are as follows: The system includes one or more of the following fields: a field indicating the number of EHT-SIG field symbols or the number of multi-user multi-input multi-output users; a field indicating the modulation and coding scheme of the EHT-SIG field and whether dual-carrier modulation is used; a field indicating the number of ultra-high throughput long training field (EHT-LTF) symbols, the mid-amble period, and the Doppler; a resource unit allocation instruction field; a preamble puncture instruction field; and a Center 26-tone Resource Allocation (Center 26-tone RU) instruction field.

[0107] In some implementations, the first string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the first string group containing the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the third string group including the third string indicates that a Doppler is present and the mid-amble period is the second period, the third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0108] Thus, in the method described above, information bits are saved, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information, and enabling the station to acquire more information.

[0109] According to a 20th aspect, the implementation of the present invention further provides a station including a processing unit and a transceiver unit.

[0110] The transceiver unit is configured to receive PPDU transmitted by the network device.

[0111] The PPDU includes an EHT-SIG field, which includes fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler constitute a first string, and the first string group including the first string indicates the absence of Doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field indicating the number of EHT-LTF symbols, the mid-amble period, and the Doppler, and the second string group including the second string indicates that a Doppler exists and the mid-amble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The fields indicating the number of the EHT-LTF symbols, the midamble period, and the Doppler are the third string, and the third string group including the third string indicates that there is Doppler and the midamble period is the second period. The third string indicates the number of EHT-LTF symbols, and each string of the third string group corresponds to one number of EHT-LTF symbols.

[0112] Thus, the station determines the Doppler and the midamble period based on the string group including the string, and indicates the number of EHT-LTF symbols based on the value of the string. In this case, the number of information bits of the fields indicating the number of EHT-LTF symbols, the Doppler, and the midamble period is reduced. Thus, since the PPDU can carry more other information, the station can obtain more information from the PPDU.

[0113] According to the 21st aspect, the implementation of the present application further provides a station including a processing unit and a transceiver unit.

[0114] The transceiver unit is configured to receive a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field.

[0115] The j-th information bit from the i-th information bit of the first content channel carries a user field, and the fields of the first (i - 1) information bits of the first content channel are the same as the fields of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j, or The i-th to j-th information bits of the first content channel carry the resource unit allocation instruction field and the user field, the fields of the first (i-1) information bits of the first content channel are the same as the fields of the first (i-1) information bits of the second content channel, and both i and j are positive integers, i <jである。

[0116] According to a 22nd aspect, the implementation of the present invention further provides a station including a processing unit and a transceiver unit.

[0117] The transceiver unit is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving the PPDUs is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0118] The j-th information bit from the i-th information bit of the first content channel carries the user field, and the j-th information bit from the i-th information bit of the second content channel carries the padding field, where both i and j are positive integers, i <jである。

[0119] According to a 23rd aspect, the implementation of the present invention further provides a station including a processing unit and a transceiver unit.

[0120] The transceiver unit is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving the PPDUs is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0121] The first content channel includes a first sub-user field, the second content channel includes a second sub-user field, and the first user's user field includes the first sub-user field and the second sub-user field.

[0122] According to a 24th aspect, the implementation of the present invention further provides a station including a processing unit and a transceiver unit.

[0123] The transceiver unit is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving the PPDUs is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0124] Thus, the user field of the first content channel is the same as the user field of the second content channel.

[0125] According to the 25th aspect, an implementation of the present invention further provides a network device including a processor. The processor is coupled to memory. When the processor executes a computer program or instruction in the memory, one of the methods of the implementation of the first aspect is performed, or one of the methods of the second to sixth aspects is performed.

[0126] According to the 26th aspect, an implementation of the present invention further provides a station including a processor. The processor is coupled to memory. When the processor executes a computer program or instruction in the memory, any method of implementation of the 7th aspect is performed, or any one method of the 8th to 12th aspects is performed.

[0127] According to the 27th aspect, an implementation of the present invention further provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. The computer instructions instruct a network device to perform any one method of the implementation of the first aspect; the computer instructions instruct the network device to perform any one method of the implementation of the second to sixth aspects; the computer instructions instruct a station to perform any one method of the implementation of the seventh aspect; or the computer instructions instruct a station to perform any one method of the implementation of the eighth to twelfth aspects.

[0128] According to the 28th aspect, an implementation of the present invention further provides a computer program product, the computer program product including a computer program, the computer being made executable by any one method of the implementation of the first aspect, the computer being made executable by any one method of the second to sixth aspects, the computer being made executable by any one method of the implementation of the seventh aspect, or the computer being made executable by any one method of the eighth to twelfth aspects.

[0129] According to a 29th aspect, an implementation of the present application further provides a communication device including an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit to perform some or all of the steps of any one method that may be performed by a network device or station in an embodiment of the present application.

[0130] In a particular implementation process, the communication device may be a chip. The input circuit may be an input pin. The output circuit may be an output pin. The processing circuit may be a transistor, a gate circuit, a trigger, any logic circuit, etc. The input signal received by the input circuit may be received and input by a receiver, for example, but not limited to this, and the signal output by the output circuit may be output to a transmitter, for example, but not limited to this, and transmitted by the transmitter. The input circuit and the output circuit may be the same circuit, and the circuit may be used as the input circuit and the output circuit at different moments. Specific implementations of the processor and various circuits are not limited to these embodiments of the present application. [Brief explanation of the drawing]

[0131] [Figure 1] This is a schematic diagram of the network architecture of a communication system according to an embodiment of the present invention.

[0132] [Figure 2] This is a schematic diagram of the network architecture of another communication system according to an embodiment of the present invention.

[0133] [Figure 3] This is a schematic flowchart of the data transmission method according to the embodiment of the present invention.

[0134] [Figure 4A] This is a schematic diagram of the structure of the first U-SIG field and the first EHT-SIG field according to an embodiment of the present invention.

[0135] [Figure 4B] This is a schematic diagram of the structure of the second U-SIG field and the second EHT-IG field according to the embodiment of the present application.

[0136] [Figure 5] This is a schematic flowchart of a data transmission method according to another embodiment of the present invention.

[0137] [Figure 6] This is a schematic flowchart of a data transmission method according to yet another embodiment of the present invention.

[0138] [Figure 7] This is a schematic diagram of the structures of CC1 and CC2 according to the embodiment of the present application.

[0139] [Figure 8] This is a schematic diagram of the structures of CC1 and CC2 according to another embodiment of the present application.

[0140] [Figure 9] This is a schematic diagram of the structures of CC1 and CC2 according to yet another embodiment of the present application.

[0141] [Figure 10] This is a schematic diagram of the structures of CC1 and CC2 according to yet another embodiment of the present application.

[0142] [Figure 11] This is a schematic diagram of a network device module according to an embodiment of the present invention.

[0143] [Figure 12] This is a schematic diagram of the structure of a network device according to another embodiment of the present invention.

[0144] [Figure 13] This is a schematic diagram of the structure of a network device according to another embodiment of the present invention.

[0145] [Figure 14] This is a schematic diagram of the structure of a network device according to another embodiment of the present invention.

[0146] [Figure 15] This is a schematic diagram of the structure of a network device according to another embodiment of the present invention.

[0147] [Figure 16]This is a schematic diagram of the structure of a network device according to another embodiment of the present invention.

[0148] [Figure 17] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0149] [Figure 18] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0150] [Figure 19] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0151] [Figure 20] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0152] [Figure 21] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0153] [Figure 22] This is a schematic diagram of the bureau according to the embodiment of the present invention.

[0154] [Figure 23] This is a schematic diagram of the structure of a network device according to an embodiment of the present invention.

[0155] [Figure 24] This is a schematic diagram of the structure of the station according to the embodiment of the present invention.

[0156] [Figure 25] This is a schematic diagram of the structure of a communication device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0157] The technical solution of this application will be described below with reference to the attached drawings.

[0158] The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application are determined in accordance with the 802.11be standard. Alternatively, the names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application may be the names of the corresponding SIG fields in other standard versions. The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application are not limited to SIG fields related to the 802.11be standard. The first EHT-SIG field and the second EHT-SIG field in the implementation of this application may be used to refer to SIG fields related to any standard version.

[0159] Figure 1 is a schematic diagram of the network architecture of a communication system in an SU transmission scenario. The communication system 100 includes network devices 110 and STA 120.

[0160] The network device 110 transmits the PPDU to the STA120. The STA120 receives the PPDU and demodulates the data within the PPDU based on the U-SIG field and EHT-SIG field within the PPDU.

[0161] Figure 2 is a schematic diagram of the network architecture of a communication system in an MU transmission scenario. The communication system 200 includes a network device 210 and multiple STAs 220. The network device 210 transmits PPDUs to the multiple STAs 220. The STAs receive the PPDUs and demodulate the data within the PPDUs based on the U-SIG field and EHT-SIG field within the PPDUs.

[0162] Regardless of whether it is SU transmission or MU transmission, the PPDU transmitted to the station by the network equipment includes the U-SIG field and the EHT-SIG field.

[0163] STA is a logical entity with media access control and physical layer functions according to IEEE 802.11, and is a general term for both access points and non-AP STAs.

[0164] Table 1 shows the fields included in the U-SIG field in conventional implementations and the number of information bits for each field. Table 2 shows the fields included in the EHT-SIG field in conventional implementations and the number of information bits for each field. [Table 1] [Table 2]

[0165] In the conventional implementation described above, it can be seen that the fields included in the U-SIG field in the SU transmission scenario and the number of information bits in each field are the same as in the MU transmission scenario. Similarly, the fields included in the EHT-SIG field in the SU transmission scenario and the number of information bits in each field are the same as in the MU transmission scenario.

[0166] Refer to Figure 3. Figure 3 is a schematic flowchart of the data transmission method according to an embodiment of the present invention. The data transmission method includes the following steps.

[0167] S301: The network device generates the first PPDU.

[0168] The first PPDU includes a first universal signaling field (U-SIG field) and a first ultra-high throughput signaling field (EHT-SIG field), where the sum of the number of information bits in the first U-SIG field and the first EHT-SIG field is 78 information bits or less.

[0169] S302: The network device sends the encoded first PPDU to the STA.

[0170] In step S301, it can be understood that the PPDU generated by the network device is an unencoded PPDU. Both the first U-SIG field and the first EHT-SIG field are unencoded. The number of information bits is the number of unencoded bits. The sum of the number of bits in the unencoded first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. After generating the first PPDU, the network device can encode the first PPDU and then transmit the encoded first PPDU to the STA.

[0171] After the first PPDU is encoded, the number of bits occupied by each field of the first PPDU changes. For example, encoding is performed using MCS0, which is a binary phase shift keying (BPSK) modulation with a coding rate of 1 / 2. In this case, the sum of the bits in the first U-SIG field and the first EHT-SIG field of the encoded first PPDU is 156 bits, which is the sum of the orthogonal frequency division multiplexing (OFDM) symbols. When using a different modulation scheme and a different coding rate, 156 bits can also be described as the equivalent number of symbols.

[0172] S303:STA decodes the first PPDU and obtains the decoded first PPDU. The decoded first PPDU contains the first U-SIG field and the first EHT-SIG field.

[0173] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions: At least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field, which is used to uniquely identify a single STA; it represents the PPDU format, and the field contained in the first U-SIG field or the first EHT-SIG field occupies more than one information bit; or the first U-SIG field or the first EHT-SIG field contains a space reuse indicator field.

[0174] In the conventional technical solution corresponding to Figure 2, the fields included in the U-SIG field and the number of information bits in each field are the same as in the MU transmission scenario, and some fields required during MU transmission are not required in the SU scenario. As a result, overhead is wasted, and transmission resources cannot be fully utilized. Thus, compared to the conventional technical solution, the technical solution of the embodiment of the present invention can guarantee that the sum of the number of information bits in the first U-SIG field and the first EHT-SIG field is 78 information bits or less. This reduces instruction overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing instruction overhead.

[0175] Specifically, in the example, at least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field. The identifier indicator field is used to uniquely identify a single STA. Specifically, the identifier indicator field is an Association Identifier (AID), which can uniquely identify or indicate a station. A station is a station in a Basic Service Set (BSS) that includes network equipment. In this way, the encoded first PPDU contains an identifier indicator field used to indicate a unique STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is being sent to the STA without continuing to receive subsequent preamble data fields. This reduces the power consumption of the STA. Furthermore, even if the data fields following the first U-SIG field and the data fields following the first EHT-SIG field are not received correctly, the STA can determine that the first PPDU was sent to the STA based on the first U-SIG field and the first EHT-SIG field, allowing the STA to perform HARQ composite reception based on subsequent retransmissions. In addition, third-party equipment can know the sender and receiver of the first PPDU without causing interference to the equipment performing the transmission. This helps third-party equipment perform scheduling.

[0176] Specifically, the fact that at least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field can be understood as follows: the first U-SIG field contains an identifier indicator field, the first EHT-SIG field contains an identifier indicator field, or both the first U-SIG field and the first EHT-SIG field contain an identifier indicator field, the first U-SIG field contains a portion of the identifier indicator field, and the first EHT-SIG field contains another portion of the identifier indicator field.

[0177] The identifier field can indicate a unique STA. For example, if a network device sends the first PPDU to one STA in an SU transmission scenario, the identifier field can uniquely indicate one STA.

[0178] Specifically, the identifier indicator field has 11 information bits. In this way, the information bits of the identifier indicator field can satisfy the requirement for information bits to uniquely identify a single STA.

[0179] In another example, a field included in the first U-SIG field or the first EHT-SIG field, indicating the PPDU format, occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, in the embodiments of the present application, the PPDU format indicator field occupies one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0180] For example, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple (MU non-OFDMA), or MU OFDMA, further include information indicating trigger-based (TB) frames, and further include information indicating whether puncturing is performed.

[0181] Furthermore, the PPDU format indicator field may indicate the PPDU format and that the transmission mode is SU or MU transmission. Thus, upon receiving the U-SIG field of the first (N-1) information bits, the STA can determine whether SU transmission or MU transmission is to be performed and use the corresponding receive policy.

[0182] In yet another example, the first U-SIG field and the first EHT-SIG field include space reuse instruction fields. This allows for support of space reuse functionality.

[0183] Specifically, the aforementioned space reuse instruction field consists of the following four items: You may specify one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR group overlapping basic service set (OBSS) packet detection-based spatial reuse).

[0184] Optionally, the first EHT-SIG field may be encoded using an encoding scheme agreed upon by the network device and the STA. For example, the modulation and coding scheme (MCS) used may be MSC0, and dual carrier modulation (DCM) may not be used. In this way, the first U-SIG field does not contain the MCS and DCM indicator fields of the EHT-SIG field, thus saving information bits, which can then be used to carry other important information. The agreed-upon coding scheme may be, for example, a coding scheme specified in the protocol.

[0185] In some embodiments, the length of the second U-SIG field of the unencoded second PPDU is equal to the number of information bits in the first U-SIG field, and both the number of information bits in the first U-SIG field and the number of information bits in the second U-SIG field are 52 information bits or less. The first PPDU is transmitted by the network device to one STA when the network device is performing single-user transmission, and the second PPDU is transmitted by the network device to multiple STAs when the network device is performing multi-user transmission.

[0186] In the SU scenario, the number of information bits in the first U-SIG field of the first PPDU transmitted to the STA by the network device is equal to the number of information bits in the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the receive policy for the STA to receive the first U-SIG field in the SU scenario and the receive policy for the STA to receive the second U-SIG field in the MU scenario, helping the STA receive the U-SIG field in different scenarios.

[0187] The number of information bits in both the first U-SIG field and the second U-SIG field is 52 information bits or less. One OFDM symbol contains 52 information bits. A small number of information bits in the first and second U-SIG fields indicates a small number of information bits in the encoded first and second U-SIG fields. In this case, the number of OFDM symbols occupied by the U-SIG fields in the encoded first PPDU is also reduced, thus saving radio transmission resources.

[0188] In some implementations, the first U-SIG field and the first EHT-SIG field contain an identifier indicator field. The identifier indicator field contains a first indicator subfield and a second indicator subfield. The first U-SIG field contains the first indicator subfield, and the first EHT-SIG field contains the second indicator subfield. In this case, the identifier indicator field is divided into two parts. The first U-SIG field contains one part, and the first EHT-SIG field contains the other part. In this way, the number of information bits in the first U-SIG field or the first EHT-SIG field is avoided because it is necessary to indicate a unique STA by making sufficient use of the idle bits in the first U-SIG field and the first EHT-SIG field.

[0189] In some optional embodiments, the start information bit of the first indicator subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. That is, the field type of the field in the first U-SIG field that precedes the first indicator subfield is the same as the field type of the first (N-1) information bits at the corresponding position in the second U-SIG field. Thus, when the STA receives the first U-SIG field in an SU scenario and the second U-SIG field in an MU scenario, the same policy is used to receive the first portion of the information bits. This helps reduce the differences in receiving policies for the STA to receive U-SIG fields in different scenarios and helps the STA receive and demodulate the PPDU.

[0190] In some other optional embodiments, the second EHT-SIG field of the unencoded second PPDU includes an AID indicator field, and the field type of the field following the second indicator subfield in the first EHT-SIG field is the same as the field type of the field following the AID indicator field in the second EHT-SIG field. Thus, when the STA receives the first U-SIG field in an SU scenario and the second U-SIG field in an MU scenario, the same policy is used to receive the information bits of the field following the second indicator subfield and the information bits following the AID indicator field. This helps reduce the difference in receiving policies for the STA to receive the U-SIG field in different scenarios, and helps the STA receive and demodulate the PPDU.

[0191] Furthermore, the two optional embodiments described above can be combined. For example, the start information bit of the first instruction subfield is the Nth information bit of the first U-SIG field, the field type of the first (N-1) information bits of the first U-SIG field is the same as the field type of the first (N-1) information bits of the second U-SIG field, where N is a positive integer greater than 1 and less than 35. The second EHT-SIG field of the unencoded second PPDU includes the STA instruction field. The field type of the field following the second instruction subfield in the first EHT-SIG field is the same as the field type of the field following the STA instruction field in the second EHT-SIG field. Thus, when the STA receives the first U-SIG field in the SU scenario and the second U-SIG field in the MU scenario, the same policy is used to receive the information bits of the field following the second instruction subfield and the information bits following the STA instruction field. This helps reduce differences in the receiving policy for STAs to receive the U-SIG field in different scenarios, and helps STAs receive and demodulate the PPDU. The STA indicator field may be, for example, the AID used to uniquely identify a single STA.

[0192] In this embodiment of the present application, both the first and second PPDUs transmitted by the network device are encoded PPDUs. The first U-SIG field, second U-SIG field, first EHT-SIG field, and second EHT-SIG field, as referred to in this embodiment of the present application, are fields of an unencoded PPDU.

[0193] Specifically, the field types of the first (N-1) information bits in the first U-SIG field and the first (N-1) information bits in the second U-SIG field are as follows: physical layer version (version identifier) ​​indicator field, uplink / downlink (UL / DL) indicator field, basic service set color (BSS color) indicator field, transmission opportunity (TXOP) indicator field, bandwidth indicator field, PPDU format indicator field, space-time block code (STBC) indicator field, spatial reuse indicator field, guard interval (GI) and ultra-high throughput-long training field size (EHT-LTF Size) indicator fields, low-density parity check extra symbol segment (LDPC extra symbol segment), pre-forward error correction padding factor (Pre-FEC Padding Factor) indicator field, packet extension disambiguity (PE) It includes one or more of the following: a disambiguity indication field, or a preamble puncture indication field.

[0194] Specifically, the UL / DL indication field indicates UL or DL. The version identifier indication field specifically indicates a specific PPDU version of the first PPDU. The BSS color indication field specifically indicates the color identifier of the BSS, including the network device. The bandwidth indication field specifically indicates the packet bandwidth and preamble puncturing information. The PPDU format indication field specifically indicates the PPDU format. The STBC indication field specifically indicates whether space-time block coding is used in the data portion. The PE disambiguity indication field specifically indicates whether packet expansion ambiguity exists.

[0195] If the PPDU format instruction field has more than one information bit, the PPDU format instruction field may further include information indicating that the transmission scenario is SU, MU non-OFDMA, or MU OFDMA, information indicating that it is a trigger-based (TB) frame, and information indicating whether puncturing is performed.

[0196] The PPDU format instruction field may be used in combination with the UL / DL instruction field. If the UL / DL instruction field indicates DL, the PPDU format instruction field may indicate SU, MU non-OFDMA, or MU OFDMA; or if the UL / DL instruction field indicates UL, the PPDU format instruction field may indicate TB or null.

[0197] Alternatively, if the UL / DL indicator field indicates UL, the PPDU format indicator field indicates that the transmission scenario is SU non-punctured, SU punctured, MU non-OFDMA, or MU OFDMA. Or, if the UL / DL indicator field indicates UL, the PPDU format indicator field indicates that the transmission scenario is an SU non-punctured string or an SU punctured string, or TB.

[0198] For example, the PPDU format instruction field has two information bits. The PPDU format instruction field can contain any one of the binary values ​​corresponding to 0 through 3. If the UL / DL instruction field indicates DL, 00 indicates that the transmission scenario is SU, 01 indicates that the transmission scenario is MU non-OFDMA, 10 indicates that the transmission scenario is MU OFDMA, and 11 can be used as a reserved string. Alternatively, if the UL / DL instruction field indicates UL, 00 indicates that the transmission scenario is SU, 01 indicates TB, and 10 and 11 are reserved strings.

[0199] Alternatively, if the UL / DL indicator field indicates DL, 00 indicates the transmission scenario is SU non-punctured, 01 indicates the transmission scenario is SU punctured, 10 indicates the transmission scenario is MU non-OFDMA, and 11 indicates the transmission scenario is MU OFDMA. Alternatively, if the UL / DL indicator field indicates UL, 00 indicates the transmission scenario is SU non-punctured, 01 indicates the transmission scenario is SU punctured, 10 indicates TB, and 11 is a reserved string.

[0200] The field type of the field following the second indicator subfield in the first EHT-SIG field, and the field type of the field following the STA indicator field in the second EHT-SIG field, are as follows: It includes one or more fields indicating the number of spatial-time streams (NSTS), midamble periodicity, and Doppler; a beamformed indicator field; a beam change indicator field; a modulation and coding scheme (MCS) and whether dual-carrier modulation (DCM) is used; and a coding indicator field (coding).

[0201] Specifically, the fields NSTS, midamble periodicity, and doppler indicate the number of space-time streams for one STA based on the midamble period and doppler. The beamformed field specifically indicates whether beamforming is used. The beam change field specifically indicates whether beam changes are performed on packets. The MCS and DCM fields indicate the modulation and coding scheme of the STA and whether dual-carrier modulation is used for the data portion. The coding field specifically indicates the coding scheme.

[0202] The field type following the Nth information bit in the second U-SIG field, and the field type of the field preceding the STA instruction field in the second EHT-SIG field, include one or more of the following: a field indicating the number of EHT-LTF symbols or multi-user multi-input multi-output users (MU-MIMO users), an EHT-SIG MCS and DCM instruction field, a field indicating the number of ultra-high throughput length training field symbols, midamble periodcity, and doppler, a resource unit allocation instruction field (RU allocation subfield), a preamble puncturing instruction field, and a Center 26-tone RU instruction field.

[0203] The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler may include subfields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler, or a single field may be used to indicate the number of EHT-LTF symbols, midamble periodcity, and doppler.

[0204] Specifically, the field indicating the number of EHT-LTF symbols or MU-MIMO users indicates the number of MU-MIMO users if the EHT-SIG field is in compressed mode, or the number of EHT-SIG field symbols if the EHT-SIG field is in uncompressed mode. The EHT-SIG MCS and DCM indicator fields indicate the modulation and coding scheme of the second EHT-SIG field and whether dual-carrier modulation is used in the second EHT-SIG field. The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler indicate the number of EHT-LTF symbols, midamble periodcity, and whether a doppler is present.

[0205] Refer to Figure 4A. Figure 4A is a schematic diagram of the structure of the first U-SIG field and the first EHT-SIG field according to an embodiment of the present application. The first U-SIG field and the first EHT-SIG field include a common field and a user field. Refer to Figure 4B. Figure 4B is a schematic diagram of the structure of the second U-SIG field and the second EHT-IG field according to an embodiment of the present application. The second U-SIG field and the second EHT-SIG field include a common field, an EHT MU transmission-specific field, and a plurality of user fields. The EHT MU transmission-specific field may include, but is not limited to, a field indicating the number of EHT-SIG field symbols, the EHT-SIG MCS, and the EHT-SIG field DCM, and an RU allocation subfield. The fields indicating the number of EHT-SIG field symbols, the EHT-SIG MCS, and the EHT-SIG field DCM may be fields indicating the number of EHT-SIG field symbols, the EHT-SIG MCS indicator field, and the EHT-SIG field DCM indicator field. The RU allocation subfield is optional. In OFDMA transmission scenarios, the second U-SIG field and the second EHT-SIG field include the RU allocation subfield.

[0206] The field type and number of information bits of the common field included in the first U-SIG field and the first EHT-SIG field in Figure 4A are the same as the common field included in the second U-SIG field and the second EHT-SIG field in Figure 4B. The common field may be the field of the first (N-1) information bits of the first U-SIG field, or the field of the first (N-1) information bits of the second U-SIG field.

[0207] Specifically, the common fields included in the first U-SIG field and the first EHT-SIG field may include the version identifier indicator field, UL / DL indicator field, BSS color indicator field, TXOP indicator field, bandwidth indicator field, PPDU format indicator field, STBC indicator field, spatial reuse indicator field, GI and EHT-LTF size indicator fields, LDPC Extra Symbol Segment indicator field, Pre-FEC Padding Factor indicator field, and PE disambiguity indicator field.

[0208] The field types of the user fields included in the first U-SIG field and the first EHT-SIG field in Figure 4A are the same as the user fields included in each user field group included in the second U-SIG field and the second EHT-SIG field in Figure 4B.

[0209] Specifically, the user field in Figure 4A includes the first indicator subfield of the first U-SIG field, the second indicator subfield of the first EHT-SIG field, fields indicating NSTS, midamble periodicity, and doppler, a beamformed indicator field, a beam change field, MCS and DCM indicator fields, and a coding indicator field.

[0210] The user fields in Figure 4A include the STA instruction subfield, NSTS, midamble periodicity, and doppler fields, the beamformed instruction field, the beam change field, the MCS and DCM instruction fields, and the coding instruction field.

[0211] In this embodiment of the present application, the main difference between the first U-SIG field and the first EHT-SIG field, and between the second U-SIG field and the second EHT-SIG field, is that the first U-SIG field and the first EHT-SIG field do not include the EHT MU transmission-specific field, which is not required in the SU transmission scenario. Thus, in this embodiment of the present application, the structure of the first U-SIG field and the first EHT-SIG field is more appropriate.

[0212] In this case, this field, which is not necessary in the SU transmission scenario, is omitted, and the first U-SIG field and the first EHT-SIG field can contain other more useful information, thus allowing for full use of transmission resources in the SU transmission scenario.

[0213] Furthermore, in this application, the format of the first U-SIG field and the first EHT-SIG field is partially the same as the format of the second U-SIG field and the second EHT-SIG field. In this way, the difference between the receive policy when the STA receives the first U-SIG field and the first EHT-SIG field in an SU transmission scenario and the receive policy when the STA receives the second U-SIG field and the second EHT-SIG field in an MU transmission scenario can be better controlled.

[0214] For specific examples, refer to Tables 3 and 4 for the fields included in the first U-SIG field and the second U-SIG field. Table 3 shows the fields for the first 26 information bits of the first U-SIG field and the second U-SIG field, and the number of information bits occupied by each field. Table 4 shows the fields for the 27th and 52nd information bits of the first U-SIG field and the second U-SIG field, and the number of information bits occupied by each field. [Table 3] [Table 4]

[0215] As shown in Tables 3 and 4, the content of the first 34 information bits of the first U-SIG field (B0-B25 in Table 3 and B0-B7 in Table 4) is the same as that of the second U-SIG field. The first information bit corresponds to B0, the second information bit to B1, and this method also applies to the eighth information bit, which corresponds to B7. The first eight information bits of the second symbol in the first U-SIG field and the first eight information bits of the second U-SIG field correspond to B0-B7 of the second symbol in the first U-SIG field and B0-B7 of the second symbol in the second U-SIG field, respectively.

[0216] The first 34 information bits of each of the 1st U-SIG field and the 2nd U-SIG field include the following fields: a field indicating the version identifier, a DL / UL instruction field, a BSS color instruction field, a TXOP instruction field, a bandwidth instruction field, a PPDU format instruction field, an STBC instruction field, a spatial reuse instruction field, GI and EHT-LTF size instruction fields, an LDPC Extra Symbol Segment instruction field, a PE disambiguity instruction field, and a Pre-FEC Padding Factor instruction field.

[0217] The version identifier field has 3 information bits, the DL / UL instruction field has 1 information bit, the BSS color instruction field has 6 information bits, the TXOP instruction field has 7 information bits, the bandwidth instruction field has 6 information bits, the PPDU format instruction field has 2 information bits, the STBC instruction field has 1 information bit, the space reuse instruction field has 2 information bits, the fields indicating GI and EHT-LTF sizes have 2 information bits, the LDPC Extra Symbol Segment instruction field has 1 information bit, the PE disambiguity instruction field has 1 information bit, and the Pre-FEC Padding Factor instruction field has 2 information bits.

[0218] The fields of the first 34 information bits of the first U-SIG field and the second U-SIG field may be arranged in the order shown in Table 1, or in a different order, provided that the types of fields carried by the corresponding information bits of the first U-SIG field and the second U-SIG field correspond to the same type.

[0219] Furthermore, the 35th (B8 in Table 4) to 52nd (B25 in Table 4) information bits of the second symbol in the first U-SIG field include a partial AID field, a cyclic redundancy code (CRC) indicator field, and a tail indicator field. The CRC indicator field is used for information checking. The tail indicator field is specifically used to stop coding.

[0220] The partial AID field has 8 information bits, the CRC indicator field has 4 information bits, and the tail indicator field has 6 information bits. The partial AID field can be understood as the first indicator subfield in the embodiment described above.

[0221] The 35th to 52nd information bits (B8 in Table 4) of the second U-SIG field include a field indicating the number of EHT-SIG field symbols or MU-MIMO users, an EHT-SIG MCS and DCM indicator field, a CRC indicator field, and a tail indicator field. The number of EHT-SIG field symbols or MU-MIMO users has 5 information bits, the EHT-SIG MCS and DCM indicator field has 3 information bits, the CRC indicator field has 4 information bits, and the tail indicator field has 6 information bits.

[0222] Refer to Tables 5 and 6 for the fields included in the first EHT-SIG field and the fields included in the second EHT-SIG field.

[0223] Table 5 shows the fields included in the first EHT-SIG field and the number of information bits in each field. [Table 5]

[0224] As shown in Table 5, the first EHT-SIG field includes a partial AID field, fields indicating NSTS and doppler, an MCS indicator field, a DCM indicator field, a beam change field, a coding indicator field, a beamformed indicator field, a CRC indicator field, and a tail indicator field. The partial AID field has 3 information bits, the fields indicating NSTS and doppler have 5 information bits, the MCS indicator field has 4 information bits, the DCM indicator field has 1 information bit, the beam change field has 1 information bit, the coding indicator field has 1 information bit, the beamformed indicator field has 1 information bit, the CRC indicator field has 1 information bit, and the tail indicator field has 6 information bits. The partial AID field of the first EHT-SIG field can be understood as the second indicator subfield in the embodiments described above.

[0225] The partial AID field, the fields indicating NSTS and doppler, the MCS instruction field, the DCM instruction field, the beam change field, the coding instruction field, and the beamformed instruction field of the first EHT-SIG field are sometimes collectively referred to as user fields.

[0226] In the SU transmission scenario, one portion of the AID field is located in the first U-SIG field, and the other portion of the AID field is located in the first EHT-SIG field. The sum of the number of information bits in one portion of the AID field and the number of information bits in the other portion of the AID field is 11 information bits. The STA can receive the first U-SIG field to obtain one portion of the AID field, receive the first EHT-SIG field to obtain the other portion of the AID, and obtain an 11-bit AID based on the two portions to determine the STA that is uniquely identified by the AID.

[0227] Table 6 shows the fields included in the second EHT-SIG field and the number of information bits in each field. [Table 6]

[0228] As shown in Table 6, the second EHT-SIG field includes fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler, multiple user fields, a CRC indicator field, and a tail indicator field. Each user field includes fields indicating AID, NSTS, and doppler, an MCS indicator field, a DCM indicator field, a beam change field, a coding indicator field, a beamformed indicator field, a CRC indicator field, and a tail indicator field. For every two user fields, there is one CRC indicator field and one tail indicator field. The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler have 4 information bits, and the AID has 11 information bits. The number of information bits in each of the fields indicating NSTS and doppler, the MCS indicator field, the DCM indicator field, the beam change field, the coding indicator field, the beamformed indicator field, the CRC indicator field, and the tail indicator field is the same as the number of information bits in each field of the first EHT-SIG field. The AID of the second EHT-SIG field can be understood as the STA indicator field in the embodiment described above.

[0229] In SU and MU transmission scenarios, the format of the U-SIG field is partially the same as the format of the EHT-SIG field. This helps the STA receive both the U-SIG and EHT-SIG fields. Furthermore, several important fields are included, such as the spatial reuse field. Additionally, the PPDU format indicator field has two information bits, allowing the field to carry more information. The AID field has eleven information bits. This allows for the unique identification of STAs within the BSS, including network devices.

[0230] For example, in an SU transmission scenario, one portion of the AID is in the first U-SIG field, and the other portion of the AID field is in the first EHT-SIG field. The sum of the number of information bits in one portion of the AID field and the number of information bits in the other portion of the AID field is 11 information bits. The STA can receive the first U-SIG field to obtain one portion of the AID field, receive the first EHT-SIG field to obtain the other portion of the AID, and obtain an 11-bit AID based on the one portion of the AID field and the other portion of the AID to determine the STA that is uniquely identified by the AID.

[0231] In an MU transmission scenario, if the second EHT-SIG field contains 11 information bits of AID, the STA can receive the second EHT-SIG field to obtain the AID in order to determine which STA is uniquely identified by the AID.

[0232] In orthogonal frequency division multiplexing (OFDMA) transmission scenarios, the second EHT-SIG field may include a resource unit allocation subfield (RU allocation subfield) indicator field. In non-OFDMA transmission scenarios, the second EHT-SIG field may include a preamble puncturing indicator field.

[0233] The resource unit allocation instruction field contains one or more resource unit allocation instruction subfields. Specifically, each STA corresponds to one resource unit allocation instruction subfield, and each resource unit allocation instruction subfield indicates the resource unit allocation information for the corresponding STA. The number of information bits in the resource unit allocation instruction field is related to the number of STAs n to which the network device transmits the second PPDU. For example, if the number of information bits in each resource unit allocation instruction subfield is m, then the number of information bits in the resource unit allocation instruction field is n*m. For example, m may be 8, but is not limited to this.

[0234] In scenarios where the bandwidth for transmitting the PPDU is greater than 20 MHz, the second EHT-SIG field may further include a Center26-tone RU indicator field, which has 1-2 information bits.

[0235] The RU allocation subfield or preamble puncturing instruction field, and the Center26-tone RU instruction field may precede the user fields.

[0236] In this application, the fields preceding the identifier indicator field in the first U-SIG field include, but are not limited to, all fields of the first 8 information bits of the first symbol of the first U-SIG field in Table 3 and all fields of the first 8 information bits of the second symbol in Table 4, or some fields may be omitted. Similarly, the second U-SIG field includes, but are not limited to, all fields of the first 8 information bits of the first symbol of the first U-SIG field in Table 3 and all fields of the first 8 information bits of the second symbol in Table 4. The number of information bits in each field is not limited to the number of information bits shown in Tables 3 and 4.

[0237] The order of the fields preceding the identifier indicator fields (the first (N-1) fields) of the first U-SIG field and the order of the first (N-1) fields of the second U-SIG field are not limited in this application, provided that the field types of the first (N-1) fields of the first U-SIG field are the same as the field types of the first (N-1) fields of the second U-SIG field.

[0238] In this application, the fields of the first EHT-SIG field following the identifier indicator field include, but are not limited to, all fields following the partial AID of the first EHT-SIG field in Table 4, and some fields may be omitted. Similarly, the second EHT-SIG field includes, but is not limited to, all user fields in Table 5, or some fields of each user field may be omitted.

[0239] The order of user fields in the first EHT-SIG field and the order of user fields in the second EHT-SIG field are not limited in this application. User fields are not limited to being carried only by the first EHT-SIG field and the second EHT-SIG field; some user fields may also be carried by the first U-SIG field and the second U-SIG field.

[0240] In some embodiments, parts of the fields can be removed from the first U-SIG field, the first EHT-SIG field, the second U-SIG field, and the second EHT-SIG field. For example, none of the first U-SIG field, the first EHT-SIG field, the second U-SIG field, and the second EHT-SIG field have to contain one or more beamformed indicator fields, DCM indicator fields, or coding indicator fields. Alternatively, the number of information bits in the AID indicator field can be reduced. The information bits saved in this way are used to carry other information. For example, the number of information bits in the space reuse indicator field may be increased, or the number of information bits in the preamble puncturing indicator field may be increased.

[0241] In some other embodiments, a portion of the field of the first EHT-SIG field is placed in the first U-SIG field, so that the first EHT-SIG field contains the complete identifier indicator field, the number of information bits in the first U-SIG field is kept to 52 or less, and the number of information bits in the first EHT-SIG field is kept to 26 or less. In this case, since the first EHT-SIG field contains the complete identifier indicator field, the STA can receive the identifier indicator field well.

[0242] In yet another implementation, the first PPDU applied to SU transmission in this embodiment of the present application can, as an alternative, be used only in SU transmission in the case of non-preamble puncturing. The second PPDU applied to MU transmission in this embodiment of the present application can be used in SU transmission in the case of preamble puncturing.

[0243] Refer to Figure 5. Figure 5 is a schematic flowchart of a data transmission method according to an embodiment of the present invention. The data transmission method includes the following steps.

[0244] S501: The network device generates a PPDU.

[0245] The PPDU contains an EHT-SIG field, and the EHT-SIG field contains fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler.

[0246] Specifically, the fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler have 4 information bits.

[0247] The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler may be any one of the following cases.

[0248] The field indicating the number of EHT-LTF symbols, midamble periodcity, and doppler is the first string, and the first string group containing the first string indicates that there is no doppler. The first string indicates the number of EHT-LTF symbols. Each string in the first string group corresponds to one number of EHT-LTF symbols, and the first string may be any string in the first sub-string group. The field indicating the number of EHT-LTF symbols, midamble periodcity, and doppler is the second string, and the second string group containing the second string indicates that there is doppler and the midamble period is the first period. The second string indicates the number of EHT-LTF symbols. Each string in the second string group corresponds to one number of EHT-LTF symbols, and the second string may be any string in the second sub-string group, or The fields indicating the number of EHT-LTF symbols, midamble periodicity, and Doppler are the third string. The third string group including the third string indicates that Doppler exists and the midamble period is the second period. The third string indicates the number of EHT-LTF symbols. Each string in the third string group corresponds to one number of EHT-LTF symbols, and the third string may be any string in the third substring group.

[0249] S502: The network device transmits the PPDU to the STA.

[0250] Correspondingly, the STA receives the PPDU transmitted by the network device.

[0251] As shown in Table 7, Table 7 shows the possible correspondences of each of the fields indicating the number of EHT-LTF symbols, midamble periodicity, and Doppler, and the following string groups: the first string group, the second string group, and the third string group.

Table 7

[0252] As shown in Table 6, the first string group can contain binary values ​​corresponding to 0 through 8, each binary value corresponding to one number of EHT-LTF symbols. Specifically, the nine binary values ​​0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, and 1000 respectively indicate that the number of EHT-LTF symbols is 1, 2, 4, 6, 8, 10, 12, 14, or 16. The first string group indicates the absence of a doppler. In this case, any string in the first string group can indicate the absence of a doppler based on the first string group containing the string. That is, the nine binary values ​​0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, and 1000 can each indicate the absence of a doppler.

[0253] The second string group can contain binary values ​​corresponding to 9 through 11, each binary value corresponding to one number of EHT-LTF symbols. Specifically, the three binary values ​​1001, 1010, and 1011 indicate that the number of EHT-LTF symbols is 1, 2, and 4, respectively. The second string group indicates that a doppler exists and the mid-amble period is period 1. In this case, each string in the second string group can indicate, based on the second string group containing the string, that a doppler exists and the mid-amble period is period 1. That is, each of the three binary values ​​1001, 1010, and 1011 can indicate that a doppler exists and the mid-amble period is period 1.

[0254] The third string group can contain binary values ​​corresponding to 12 through 14, with each binary value corresponding to one number of EHT-LTF symbols. Specifically, the three binary values ​​1100, 1101, and 1110 indicate that the number of EHT-LTF symbols is 1, 2, and 4, respectively. The third string group indicates that a doppler exists and the mid-amble period is period 2. In this case, each string in the third string group can indicate, based on the third string group containing the string, that a doppler exists and the mid-amble period is period 2. That is, each of the three binary values ​​1100, 1101, and 1110 can indicate that a doppler exists and the mid-amble period is period 2.

[0255] Period 1 and Period 2 are different periods. In a possible embodiment, Period 1 is 10 and Period 2 is 20.

[0256] A binary value that can be carried with 4 information bits can also include 1111. 1111 can be reserved to indicate other information. This method of indicating not only reduces the number of information bits but also provides a certain degree of scalability.

[0257] In this case, the string group containing the string indicates the doppler and midamble periodicity, and the string value indicates the number of EHT-LTF symbols. Compared to a solution where a 1-bit field indicates the doppler and a 4-bit field indicates the number of EHT-LTF symbols and midamble periodicity, this method omits the Doppler indicator field and reduces the number of information bits in the fields indicating the number of EHT-LTF symbols, midamble periodicity, and doppler.

[0258] Furthermore, the embodiment of the data transmission method corresponding to Figure 5 can be combined with the embodiment of the data transmission method corresponding to Figure 3.

[0259] Specifically, based on the embodiment of the data transmission method corresponding to Figure 3, the fields indicating the number of EHT-LTF symbols, midamble periodicity, and doppler in the first EHT-SIG field and the second EHT-SIG field can use the method for indicating the fields indicating the number of EHT-LTF symbols, midamble periodicity, and doppler as shown in the embodiment of the data transmission method corresponding to Figure 5.

[0260] Specifically, the fields indicating the number of EHT-LTF symbols, midamble period, and Doppler in the first and second EHT-SIG fields each have 4 information bits. The fields indicating the number of EHT-LTF symbols, midamble period, and Doppler may be one of several cases below.

[0261] The first string is a field indicating the number of EHT-LTF symbols, midamble periodcity, and doppler. The first string group containing the first string indicates that no doppler exists. The first string indicates the number of EHT-LTF symbols, each string in the first string group corresponds to one number of EHT-LTF symbols, and the first string may be any string in the first substring group. The second string is a field that shows the number of EHT-LTF symbols, midamble periodcity, and doppler, and the second string group containing the second string indicates that a doppler exists and midamble periodcity is period 1, the second string indicates the number of EHT-LTF symbols, each string in the second string group corresponds to one number of EHT-LTF symbols, and the second string may be any string in the second substring group, or The third string is a field that indicates the number of EHT-LTF symbols, midamble periodcity, and doppler. The third string group containing the third string indicates that a doppler exists and midamble periodcity is period 2. The third string indicates the number of EHT-LTF symbols, each string in the third string group corresponds to one EHT-LT symbol, and the third string may be any string in the third substring group.

[0262] Thus, the method described above saves information bits, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information.

[0263] Refer to Figure 6. Figure 6 is a schematic flowchart of a data transmission method according to yet another embodiment of the present invention. The data transmission method may include the following steps.

[0264] S601: The network device generates a PPDU.

[0265] S602: The network device sends the PPDU to the STA.

[0266] The bandwidth for transmitting a PPDU by a network device is greater than 20 MHz. The bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel CC1 of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel CC2 of the EHT-SIG field.

[0267] In some possible embodiments, the i-th information bit to the j-th information bit of CC1 carry a user field, and the field of the first (i - 1) information bits of CC1 is the same as the field of the first (i - 1) information bits of CC2, where both i and j are positive integers and i < j, or, The i-th information bit to the j-th information bit of CC1 carry a resource unit allocation indication field and a user field, and the field of the first (i - 1) information bits of CC1 is the same as the field of the first (i - 1) information bits of CC2, where both i and j are positive integers and i < j. For example, in an OFDMA transmission scenario, the resource unit allocation indication field is included in CC1. The resource unit allocation indication field can only be transmitted in CC1, not in CC2. This can save transmission resources.

[0268] Specifically, the user field may include, for example, an STA indication field, NSTS, a midamble periodicity, and a field indicating doppler, an MCS and DCM indication field, and a coding indication field.

[0269] Figure 7 is a schematic diagram of the structures of CC1 and CC2 according to an embodiment of the present invention. As shown in Figure 7, the first (i-1) information bits of each of CC1 and CC2 carry a U-SIG overflow field. The U-SIG overflow field is duplicated and transmitted in each of CC1 and CC2. For example, the U-SIG overflow field may include, but is not limited to, one or more of the following fields: a field indicating the number of EHT-LTF symbols, midamble periodcity, and doppler, a DL / UL indicator field, a bandwidth indicator field, a PPDU format indicator field, an STBC indicator field, a spatial reuse indicator field, an LDPC Extra Symbol Segment indicator field, a PE disambiguity indicator field, and a Pre-FEC Padding Factor indicator field.

[0270] In this way, the U-SIG Overflow field is duplicated in CC1 and CC2, which increases the probability of correct reception by the STA.

[0271] The field from the i-th to the j-th information bit of CC1 may be identical or different from the field from the i-th to the j-th information bit of CC2. The following describes the possible cases for the fields from the i-th to the j-th information bit of CC1 and CC2, assuming that the i-th to j-th information bits of CC1 carry the user field, and the field of the first (i-1) information bits of CC1 is the same as the field of the first (i-1) information bits of CC2.

[0272] In this embodiment, the field of the i-th to j-th information bits of CC2 may be identical to the field of the i-th to j-th information bits of CC1. In other words, the i-th to j-th information bits of CC2 also carry the same user field. Since the user field is duplicated and transmitted between CC1 and CC2 in this way, the probability of correct reception of the STA can be increased, and reliability can be improved.

[0273] In another embodiment, the i-th to j-th information bits of CC1 carry the user field of the STA, and the i-th to j-th information bits of CC2 carry the padding field. Thus, CC1 and CC2 have the same length. This helps the STA receive CC1 and CC2. Also, the STA does not need to read the padding field, which simplifies the STA's read operation.

[0274] In yet another embodiment, the network device transmits the PPDU to the STA in an SU scenario. The i-th to j-th information bits of CC1 carry a portion of the user field of the STA, and the information bits following the i-th information bit of CC2 carry the rest of the user field of the STA.

[0275] In yet another embodiment, the network device transmits a PPDU to multiple STAs in an MU scenario. The i-th to j-th information bits of CC1 carry a portion of the user field of each of the multiple STAs, and the information bits following the i-th information bit of CC2 carry the other portion of the user field of each of the multiple STAs.

[0276] In yet another embodiment, the network device transmits a PPDU to multiple STAs in an MU scenario. The i-th to j-th information bits of CC1 carry the user fields of the multiple STAs, and the i-th to j-th information bits of CC2 carry the user fields of the other parts of the multiple STAs.

[0277] FIG. 8 is a schematic diagram of the structures of CC1 and CC2 according to another embodiment of the present application. As shown in FIG. 8, in other possible embodiments, the i-th to j-th information bits of CC1 carry the user field, and the i-th to j-th information bits of CC2 carry the padding field, where both i and j are positive integers and i < j. That is, the user field is transmitted only in CC1 and not in CC2. Thus, the STA does not have to read this padding field, simplifying the reading process of the STA.

[0278] When i > 1, the method of the foregoing embodiment may be used for the fields of the first (i - 1) information bits of CC1 and CC2, and the fields of the first (i - 1) information bits of CC1 and CC2 are the same. The U-SIG Overflow field is transmitted with the first (i - 1) information bits of each of CC1 and CC2.

[0279] Alternatively, the field of the first (i - 1) information bits of CC1 is different from the field of the first (i - 1) information bits of CC2. For example, the U-SIG Overflow field may be transmitted in only one of CC1 or CC2.

[0280] Optionally, the i-th to j-th information bits of CC1 or the i-th to j-th information bits of CC2 may further carry a resource unit allocation indication field. The resource unit allocation indication field may alternatively be transmitted in only one of CC1 or CC2.

[0281] When i = 1, neither CC1 nor CC2 includes a U-SIG Overflow field.

[0282] Figure 9 is a schematic diagram of the structures of CC1 and CC2 according to yet another embodiment of the present application. As shown in Figure 9, in yet another possible embodiment, the user field of CC1 is the same as the user field of CC2. In this way, the user fields are duplicated and transmitted in CC1 and CC2, which can increase the probability of correct reception of the STA and improve reliability.

[0283] Optionally, the format of the EHT-SIG field included in the PPDU of some of the possible embodiments described above may be the format of the first EHT-SIG field or the second EHT-SIG field of the embodiment corresponding to Figure 3.

[0284] Figure 10 is a schematic diagram of the structure of CC1 and CC2 according to yet another embodiment of the present application. As shown in Figure 10, in yet another possible embodiment, CC1 includes a first subuser field, CC2 includes a second subuser field, and the user field of the first user includes both the first and second subuser fields. In other words, in this embodiment, a portion of the user field of the same user is transmitted by CC1 and the other portion is transmitted by CC2. This increases the number of information bits transmitted in the user field, and allows for the transmission of more information.

[0285] The fields carried by the first (i-1) information bits of CC1 and CC2 in the previously described embodiment can also be used in this embodiment. In this embodiment, the field of CC1 preceding the first subuser field may be the field carried by the first (i-1) information bits of CC1 in the previously described embodiment. In this embodiment, the field of CC2 preceding the second subuser field may be the field carried by the first (i-1) information bits of CC2 in the previously described embodiment.

[0286] It should be noted that several possible combinations of the embodiments described above are included within the scope of this application.

[0287] Refer to Figure 11. Figure 11 is a schematic diagram of a network device module according to an embodiment of the present invention. The network device 1100 is A processing unit 1101 configured to generate a first PPDU, wherein the first PPDU includes a first universal signaling field (U-SIG field) and a first ultra-high throughput signaling field (EHT-SIG field), and the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. The system includes a transceiver unit 1102 configured to transmit an encoded first PPDU to the station.

[0288] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0289] At least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field, which is used to uniquely identify a station. The first U-SIG field or the first EHT-SIG field contains a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0290] Thus, the technical solution of the embodiment of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces instruction overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing instruction overhead.

[0291] In possible implementations, at least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying a station. The station is a station within a Basic Service Set (BSS) that includes network equipment. Thus, the identifier indicator field contained in the encoded first PPDU can uniquely identify a single STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is being sent to the STA without having to continue receiving subsequent preamble data fields. This reduces the station's power consumption. Furthermore, even if the data fields following the first U-SIG field and the data fields following the first EHT-SIG field are not received correctly, the station can determine that the first PPDU was transmitted to the station based on the first U-SIG field and the first EHT-SIG field, allowing the station to perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. In addition, third-party equipment can know the sender and receiver of the first PPDU without causing interference to the equipment performing the transmission. This helps the third-party equipment perform scheduling.

[0292] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, in the embodiment of the present application, the PPDU format indicator field occupies one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0293] The PPDU format indicator field may indicate the PPDU format and that the transmission mode is SU or MU transmission. Thus, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU or MU transmission is being performed and use the corresponding receive policy.

[0294] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0295] Optionally, the length of the spatial reuse instruction field is 2 information bits. The spatial reuse instruction field consists of the following four items: You may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0296] For details of the functional implementation and technical effects of the functional units of the network device 1100 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0297] Refer to Figure 12. Figure 12 is a schematic diagram of a network device module according to another embodiment of the present application. Embodiments of the present application further provide a network device 1200 including a processing unit 1201 configured to generate a PPDU and a transceiver unit 1202 configured to transmit the PPDU to a station. The PPDU includes an EHT-SIG field, which includes fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler. The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler constitute a first string, and the first string group including the first string indicates that no doppler exists, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field that shows the number of EHT-LTF symbols, midamble periodity, and doppler, and the second string group containing the second string indicates that a doppler exists and the midamble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field that shows the number of EHT-LTF symbols, midamble periodity, and doppler. The third string group containing the third string indicates that a doppler exists and the midamble period is period 2. The third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0298] In this case, in order to indicate the Doppler and midamble period, a string group including a string is used, and the value of the string indicates the number of EHT-LTF symbols. Thereby, the information bits indicating the Doppler and midamble period can be saved.

[0299] For details of the functional implementation and technical effects of the functional units of the network device 1200 provided in this embodiment, refer to the description of the relevant details of the method provided in the embodiment of the above method. The details will not be described again here.

[0300] Refer to FIG. 13. FIG. 13 is a schematic diagram of a module of a network device according to another embodiment of the present application. The embodiment of the present application further provides a network device 1300 including a processing unit 1301 configured to generate a PPDU and a transceiver unit 1302 configured to transmit the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field.

[0301] The j-th information bit from the i-th information bit of the first content channel carries the user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j, or The j-th information bit from the i-th information bit of the first content channel carries the resource unit allocation indication field and the user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j.

[0302] The fields of the first (i-1) information bits in the first content channel and the first (i-1) information bits in the second content channel can be understood as a U-SIG overflow field. In this case, the U-SIG overflow field is duplicated in the first and second content channels, which can increase the probability of correct reception by the station.

[0303] For details of the functional implementation and technical effects of the functional units of the network device 1300 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0304] Refer to Figure 14. Figure 14 is a schematic diagram of a module of a network device according to another embodiment of the present application. Embodiments of the present application further provide a network device 1400 including a processing unit 1401 configured to generate a PPDU and a transceiver unit 1402 configured to transmit the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries a first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries a second content channel of the EHT-SIG field.

[0305] The j-th information bit from the i-th information bit of the first content channel carries the user field, and the j-th information bit from the i-th information bit of the second content channel carries the padding field, where i and j are both positive integers, i <jである。

[0306] Thus, the length of the first content channel is the same as the length of the second content channel. This helps the station receive both the first and second content channels. Furthermore, the station does not need to read this padding field, thus simplifying the station's reading process.

[0307] For details of the functional implementation and technical effects of the functional units of the network device 1400 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0308] Refer to Figure 15. Figure 15 is a schematic diagram of a module of a network device according to another embodiment of the present application. Embodiments of the present application further provide a network device 1500 including a processing unit 1501 configured to generate a PPDU and a transceiver unit 1502 configured to transmit the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries a first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries a second content channel of the EHT-SIG field.

[0309] The first content channel includes the first sub-user field, the second content channel includes the second sub-user field, and the first user's user field includes both the first and second sub-user fields.

[0310] In other words, in this embodiment, a portion of the user field of the same user is transmitted through the first content channel, and the other portion is transmitted through the second content channel. This increases the number of information bits transmitted in the user field, allowing for the transmission of more information.

[0311] For details of the functional implementation and technical effects of the functional units of the network device 1500 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0312] Refer to Figure 16. Figure 16 is a schematic diagram of a network device module according to another embodiment of the present application. Embodiments of the present application further provide a network device 1600 including a processing unit 1601 configured to generate a PPDU and a transceiver unit 1602 configured to transmit the PPDU to a station. The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field. Thus, the user field of the first content channel is the same as the user field of the second content channel.

[0313] In this case, since the user field is duplicated in the first and second content channels, the probability of correct reception by the station can be increased, thereby improving reliability.

[0314] For details of the functional implementation and technical effects of the functional units of the network device 1600 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0315] Refer to Figure 17. Figure 17 is a schematic diagram of a station module according to an embodiment of the present invention. The embodiment of the present invention is station 1700, A transceiver unit 1702 configured to receive the first PPDU transmitted by a network device, To obtain the decoded first PPDU, a processing unit 1701 configured to decode the first PPDU is provided, Further provides station 1700 including the following: The decoded first PPDU includes the first U-SIG field and the first EHT-SIG field, The sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0316] At least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field, which is used to uniquely identify a station. The first U-SIG field or the first EHT-SIG field contains a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0317] Thus, the technical solution of the embodiment of the present invention can ensure that the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less. This reduces the instruction overhead. Furthermore, since the first U-SIG field and the first EHT-SIG field can carry more information without increasing the instruction overhead, the station can obtain more information from the first U-SIG field and the first EHT-SIG field.

[0318] Specifically, in possible implementations, at least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field. The identifier indicator field is an Association Identifier (AID) for uniquely identifying a station. The station is a station within a Basic Service Set (BSS) that includes network equipment. In this way, the identifier indicator field contained in the encoded first PPDU can uniquely identify a single STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is being sent to the STA without having to continue receiving subsequent preamble data fields. This reduces the station's power consumption. Furthermore, even if the data fields following the first U-SIG field and the data fields following the first EHT-SIG field are not received correctly, the station can determine that the first PPDU was transmitted to the station based on the first U-SIG field and the first EHT-SIG field, allowing the station to perform a Hybrid Automatic Repeat Request (HARQ) composite reception based on subsequent retransmissions. In addition, third-party equipment can know the sender and receiver of the first PPDU without causing interference to the equipment performing the transmission. This helps the third-party equipment perform scheduling.

[0319] In another possible implementation, the field included in the first U-SIG field or the first EHT-SIG field indicating the PPDU format occupies more than one information bit. In this case, compared to a solution where only one information bit is occupied for the information bit indicating the PPDU format, in the embodiment of the present application, the PPDU format indicator field occupies one more information bit. Thus, the PPDU format indicator field can transmit more information and therefore support more functions.

[0320] The PPDU format indicator field may indicate the PPDU format and that the transmission mode is SU or MU transmission. Thus, upon receiving the U-SIG field of the first (N-1) information bits, the station can determine whether SU or MU transmission is being performed and use the corresponding receive policy.

[0321] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a space reuse instruction field. This allows for support of space reuse functionality.

[0322] Optionally, the length of the spatial reuse instruction field is 2 information bits. The spatial reuse instruction field consists of the following four items: You may specify one of the following: Parameterized Spatial Reuse DISALLOW (PSR_DISALLOW), SR_RESTRICTED (to prohibit spatial reuse transmission), SR_DELAY (to delay spatial reuse transmission), or SR_DELAY (to prohibit both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse). The spatial reuse instruction field is used by the station to implement the corresponding spatial reuse function.

[0323] For details of the functional implementation and technical effects of the functional unit of station 1700 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0324] Refer to Figure 18, which is a schematic diagram of a station module according to another embodiment of the present application. Embodiments of the present application further provide a station 1800 including a processing unit 1801 and a transceiver unit 1802.

[0325] The transceiver unit 1802 is configured to receive PPDU transmitted by the network device.

[0326] The PPDU contains an EHT-SIG field, which contains fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler. The fields indicating the number of EHT-LTF symbols, midamble periodcity, and doppler constitute the first string, and the first string group containing the first string indicates the absence of a doppler, the first string indicates the number of EHT-LTF symbols, and each string in the first string group corresponds to one number of EHT-LTF symbols. The second string is a field that shows the number of EHT-LTF symbols, midamble periodity, and doppler, and the second string group containing the second string indicates that a doppler exists and the midamble period is the first period, the second string indicates the number of EHT-LTF symbols, and each string in the second string group corresponds to one number of EHT-LTF symbols, or The third string is a field that shows the number of EHT-LTF symbols, midamble periodity, and doppler. The third string group containing the third string indicates that a doppler exists and the midamble period is period 2. The third string indicates the number of EHT-LTF symbols, and each string in the third string group corresponds to one number of EHT-LTF symbols.

[0327] In this way, the station determines the Doppler and midamble period based on a string group including strings, and indicates the number of EHT-LTF symbols based on the value of the string. In this case, the number of information bits of the field indicating the number of EHT-LTF symbols, Doppler, and midamble period is reduced. In this way, since the PPDU can carry more other information, the station can obtain more information from the PPDU.

[0328] For details of the functional implementation and technical effects of the functional units of the station 1800 provided in this embodiment, refer to the description of the relevant details of the method provided in the embodiment of the above method. The details will not be described again here.

[0329] Refer to FIG. 19. FIG. 19 is a schematic diagram of a module of a station according to another embodiment of the present application. The embodiment of the present application further provides a station including a processing unit 1901 and a transceiver unit 1902.

[0330] The transceiver unit 1902 is configured to receive a PPDU transmitted by a network device. The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries the second content channel of the EHT-SIG field.

[0331] The j-th information bit from the i-th information bit of the first content channel carries a user field, and the field of the first (i - 1) information bits of the first content channel is the same as the field of the first (i - 1) information bits of the second content channel, where both i and j are positive integers and i < j, or The i-th to j-th information bits of the first content channel carry the resource unit allocation instruction field and the user field, the fields of the first (i-1) information bits of the first content channel are the same as the fields of the first (i-1) information bits of the second content channel, and both i and j are positive integers, i <jである。

[0332] For details of the functional implementation and technical effects of the functional unit of station 1900 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0333] Refer to Figure 20, which is a schematic diagram of a station module according to another embodiment of the present application. Embodiments of the present application further provide a station 2000 including a processing unit 2001 and a transceiver unit 2002.

[0334] The transceiver unit 2002 is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving PPDUs is greater than 20 MHz and includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0335] The j-th information bit from the i-th information bit of the first content channel carries the user field, and the j-th information bit from the i-th information bit of the second content channel carries the padding field, where both i and j are positive integers, i <jである。

[0336] For details of the functional implementation and technical effects of the functional unit of station 2000 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0337] Refer to Figure 21, which is a schematic diagram of a station module according to another embodiment of the present application. Embodiments of the present application further provide a station 2100 including a processing unit 2101 and a transceiver unit 2102.

[0338] The transceiver unit 2102 is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving PPDUs is greater than 20 MHz and includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0339] The first content channel includes the first sub-user field, the second content channel includes the second sub-user field, and the first user's user field includes both the first and second sub-user fields.

[0340] For details of the functional implementation and technical effects of the functional unit of station 2100 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0341] Refer to Figure 22, which is a schematic diagram of a station module according to another embodiment of the present application. Embodiments of the present application further provide a station 2200 including a processing unit 2201 and a transceiver unit 2202.

[0342] The transceiver unit 2202 is configured to receive PPDUs transmitted by network devices. The bandwidth for receiving PPDUs is greater than 20 MHz and includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0343] The user fields for the first content channel will be the same as the user fields for the second content channel.

[0344] For details of the functional implementation and technical effects of the functional unit of station 2200 provided in this embodiment, please refer to the description of the relevant details of the method provided in the embodiment of the method described above. Further details are not described here.

[0345] Figure 23 is a schematic diagram of the structure of a network device according to an embodiment of the present invention. Refer to Figure 23. Figure 23 schematically provides a possible basic hardware architecture of the network device according to the present invention.

[0346] The network device 2300 includes at least a processor 2310 and a transceiver 2320. The processor 2310 is coupled to a memory 2330. The processor 2310, the transceiver 2320, and the memory 2330 are coupled to each other via a bus 2340.

[0347] The processor 2310 may be a central processing unit (CPU), or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or a combination thereof.

[0348] The transceiver 2320 may include a receiver and a transmitter, such as a radio frequency module. The receiving or transmission of the following messages by the processor 2310 can be understood specifically as the processor 2310 using the transceiver to receive or transmit messages. Optionally, the transceiver 2320 may be a transceiver circuit.

[0349] Memory 2330 may be the memory of the network device 2300, or it may be external memory connected to the processor 2310. Memory 2330 may be a physically separate unit, or it may be integrated into the processor 2310. Memory 2330 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, or a cache. Memory 2330 is configured to store related instructions and data, and may transmit the stored data to the processor 2310.

[0350] Specifically, the processor 2310 and transceiver 2320 of the network device 2300 in this embodiment can be understood as a processing unit and a transceiver unit in an embodiment corresponding to any one of Figures 11 to 16.

[0351] The processor 2310 of the network device 2300 is configured to read relevant instructions in memory 2330 and to execute some or all of the steps performed by the network device in any one of the embodiments of the method described above. For a relevant description of the instructions executed by the processor of the network device 2300 and their technical effects, see the embodiments of the method described above. Further details are not described here again.

[0352] For example, the processor 2310 of the network device 2300 is configured to read relevant instructions in memory 2330 and perform the following operations: generate a first PPDU, which includes a first U-SIG field and a first ultra-high throughput signaling field EHT-SIG field, where the sum of the number of information bits in the first U-SIG field and the number of information bits in the first EHT-SIG field is 78 information bits or less; and transmit the first PPDU to the STA using the transceiver 2320.

[0353] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0354] At least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field, which is used to uniquely identify a station. The first U-SIG field or the first EHT-SIG field contains a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0355] As another example, the processor 2310 of the network device 2300 is configured to read relevant instructions in memory 2330 and perform the following operation: send a PPDU to the STA using transceiver 2320.

[0356] The bandwidth for transmitting the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0357] The first and second content channels must satisfy at least one of the following conditions:

[0358] The i-th to j-th information bits of the first content channel carry the user field, and the field of the first (i-1) information bits of the first content channel is the same as the field of the first (i-1) information bits of the second content channel, where both i and j are positive integers, i <jである、 The i-th to j-th information bits of the first content channel carry the resource unit allocation instruction field and the user field, the i-th to j-th information bits are the same as the first (i-1) information bits of the first content channel, and the i-th to j-th information bits are the same as the first (i-1) information bits of the second content channel, where both i and j are positive integers, i <jである、 The i-th to j-th information bits of the first content channel carry the user field, and the i-th to j-th information bits of the second content channel carry the padding field, where both i and j are positive integers, i <jである、 The first content channel includes the first sub-user field, the second content channel includes the second sub-user field, and the first user's user field includes the first and second sub-user fields, or The user fields in the first content channel are the same as the user fields in the second content channel. It satisfies at least one of the following conditions.

[0359] Figure 24 is a schematic diagram of the station according to an embodiment of the present invention. Refer to Figure 24. Figure 24 schematically provides a possible basic hardware architecture of the station according to the present invention.

[0360] Station 2400 includes at least a processor 2410 and a transceiver 2420. The processor 2410 is coupled to memory 2430. The processor 2410, transceiver 2420, and memory 2430 are coupled to each other via bus 2440.

[0361] The processor 2410 may be a central processing unit (CPU), or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or a combination thereof.

[0362] The transceiver 2420 may include a receiver and a transmitter, such as a radio frequency module. The processor 2410 receiving or transmitting the following messages can be understood specifically as the processor 2410 using the transceiver to receive or transmit messages.

[0363] Memory 2430 may be the memory of station 2400 or an external memory connected to processor 2410. Memory 2430 may be a physically independent unit or may be integrated into processor 2410. Memory 2430 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, or a cache. Memory 2430 is configured to store related instructions and data and may transmit the stored data to processor 2410.

[0364] Specifically, the processor 2310 and transceiver 2320 of station 2400 in this embodiment can be understood as a processing unit and a transceiver unit in an embodiment corresponding to any one of Figures 11 to 16.

[0365] Processor 2410 may read the relevant instructions in memory 2430 and perform some or all of the steps performed by the STA in any one of the methods provided in the embodiments of this application. For a relevant description of the instructions performed by the processor of station 2400 and their technical effects, see the embodiments of the methods described above. Further details are not described here again.

[0366] For example, the STA2400's processor 2410 is configured to read relevant instructions in memory 2430 and perform the following operations: receive a first PPDU transmitted by the network device via transceiver 2320; decode the first PPDU, which includes a first U-SIG field and a first EHT-SIG field.

[0367] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following conditions:

[0368] At least one of the first U-SIG field and the first EHT-SIG field contains an identifier indicator field, which is used to uniquely identify a station. The first U-SIG field or the first EHT-SIG field contains a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit, or The first demodulation instruction field includes a space reuse instruction field.

[0369] As another example, the STA2400's processor 2410 is configured to read relevant instructions in memory 2430 and perform the following operations: receive a PPDU transmitted by a network device.

[0370] The bandwidth for receiving the PPDU is greater than 20 MHz, and the bandwidth includes a first subbandwidth and a second subbandwidth. The first subbandwidth carries the first content channel of the EHT-SIG field of the PPDU, and the second subbandwidth carries the second content channel of the EHT-SIG field.

[0371] The first and second content channels must satisfy at least one of the following conditions:

[0372] The i-th to j-th information bits of the first content channel carry the user field, and the field of the first (i-1) information bits of the first content channel is the same as the field of the first (i-1) information bits of the second content channel, where both i and j are positive integers, i <jである、 The i-th to j-th information bits of the first content channel carry the resource unit allocation instruction field and the user field, the i-th to j-th information bits are the same as the first (i-1) information bits of the first content channel, and the i-th to j-th information bits are the same as the first (i-1) information bits of the second content channel, where both i and j are positive integers, i <jである、 The i-th to j-th information bits of the first content channel carry the user field, and the i-th to j-th information bits of the second content channel carry the padding field, where both i and j are positive integers, i <jである、 The first content channel includes the first sub-user field, the second content channel includes the second sub-user field, and the first user's user field includes the first and second sub-user fields, or The user fields in the first content channel are the same as the user fields in the second content channel. It satisfies at least one of the following conditions.

[0373] Figure 25 is a schematic diagram of the structure of a communication device according to an embodiment of the present invention. The embodiment of the present invention further provides a communication device 2500 including an input circuit 2501, an output circuit 2502, and a processing circuit 2503. The processing circuit 2503 is configured to receive a signal via the input circuit 2501 and transmit a signal via the output circuit 2502 to perform some or all of the steps of any one method that may be performed by a network device or STA in an embodiment of the present invention.

[0374] In a particular implementation process, the communication device may be a chip. The input circuit may be an input pin. The output circuit may be an output pin. The processing circuit may be a transistor, a gate circuit, a trigger, any logic circuit, etc. The input signal received by the input circuit may be received and input by a receiver, for example, but not limited to this, and the signal output by the output circuit may be output to a transmitter, for example, but not limited to this, and transmitted by the transmitter. The input circuit and the output circuit may be the same circuit, and the circuit may be used as an input circuit and an output circuit at different moments. Specific implementations of the processor and various circuits are not limited to these embodiments of the present application.

[0375] Embodiments of the present invention further provide a computer-readable storage medium that stores a computer program (which may also be called code or instructions). When the computer program is executed on a computer, the computer is made capable of performing some or all of the steps of any one method that may be performed by a network device or an STA in embodiments of the present invention.

[0376] Embodiments of the present invention further provide a computer program product including instructions. When the computer program product is executed on a computer device, the computer device is made capable of performing some or all of the steps of either a network device or an STA.

[0377] In the embodiment, the network device in Figure 1 or Figure 2 is an access point (AP). The access point may be an access point for terminal devices (e.g., mobile phones) to enter a wired (or wireless) network and is mainly deployed in homes, buildings, or campuses. A typical coverage radius is tens to hundreds of meters. Of course, the access point may also be deployed outdoors. The access point is equivalent to a bridge connecting a wired network and a wireless network. The main function of the access point is to connect various wireless network clients and connect the wireless network to Ethernet. Specifically, the access point may be a terminal device (such as a mobile phone) or network device (such as a router) equipped with a wireless fidelity (Wi-Fi) chip. The access point may be a device that supports the 802.11be standard. Alternatively, the access point may be a device that supports multiple wireless local area network (WLAN) standards of the 802.11 family, such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a. The access point of this application may be a high-efficiency (HE) AP or an extremely high-throughput (EHT) AP, or an access point that is compatible with future Wi-Fi standards.

[0378] In yet another embodiment, the network device in Figure 1 or Figure 2 is a non-access point station (none -This is an access point station (non-APSTA). The station may be a wireless communication chip, wireless sensor, wireless communication terminal, etc., and is sometimes called a user. For example, it may be a mobile phone with Wi-Fi communication capabilities, a tablet computer with Wi-Fi communication capabilities, a set-top box with Wi-Fi communication capabilities, a smart TV with Wi-Fi communication capabilities, an intelligent wearable device with Wi-Fi communication capabilities, an in-vehicle communication device with Wi-Fi communication capabilities, or a computer with Wi-Fi communication capabilities. Optionally, the station may support the 802.11be standard. The station may support multiple wireless local area network (WLAN) standards in the 802.11 family, such as the 802.11be standard, 802.11ax standard, 802.11ac standard, 802.11n standard, 802.11g standard, 802.11b standard, and 802.11a standard. The station of this application may be a high-efficiency (HE) STA or an extremely high-throughput (EHT) STA, or an STA applicable to future Wi-Fi standards.

[0379] For example, access points and stations may be alternative devices applied to the Internet of Vehicles, Internet of Things (IoT) nodes or sensors, smart city sensors, or smart cameras, smart remotes, or smart water meters in smart homes.

[0380] Access points and stations may be replaced by communication servers, switches, bridges, or computers.

[0381] The technical solution provided in this application is applicable to data communication between an AP and one or more STAs, and is also applicable to communication between APs and between STAs.

[0382] While embodiments of this application are described primarily using a network deployed based on IEEE 802.11 as an example, it will be readily apparent to those skilled in the art that various aspects of this application can be extended to other networks using various standards or protocols, such as Bluetooth, high-performance radio LAN (HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard, mainly used in Europe), wide area networks (WANs), wireless local area networks (WLANs), personal area networks (PANs), or other networks that are currently known or have been developed later. Therefore, various aspects provided in this application can be applied to any suitable wireless network, regardless of coverage or wireless access protocol.

[0383] It should be understood that the terms "First," "Second," "Third," "Fourth," and various numbers in this specification are used solely for the purpose of ease of description and are not to be construed as limitations on the scope of this application.

[0384] It should be understood that the terms "and / or" in this specification simply describe an association relationship that describes the associated objects, and that three such relationships may exist. For example, A and / or B may represent the following three cases: A exists alone, both A and B exist, and B exists alone. Furthermore, the letter " / " in this specification usually indicates an "or" relationship between the associated objects.

[0385] It should be understood that the sequence numbers of the aforementioned processes do not represent the execution order in the embodiments of this application. The execution sequence of a process should be determined according to the function and internal logic of the process and should not be construed as a limitation on the implementation process of the embodiments of this application.

[0386] A person skilled in the art will recognize, in combination with the examples described in the embodiments disclosed in this specification, that the units and algorithms can be implemented by electronic hardware or by a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for each specific application, but the implementation should not be considered to be beyond the scope of this application.

[0387] For convenience and to provide a concise explanation, it will be readily apparent to those skilled in the art that the detailed operating processes of the aforementioned systems, equipment, and units are described by referring to the corresponding processes in the embodiments of the methods described above. Further details are not described here.

[0388] In some embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the embodiments of the described devices are merely examples. For example, the division into units is merely a logical functional division, and in actual implementation, other divisions may be used. For example, multiple units or components may be combined or integrated into another system, or some functions may be ignored or not performed. Furthermore, the mutual coupling, direct coupling, or communication connection shown or discussed may be implemented through some interfaces. Indirect coupling or communication connection between devices or units may be implemented electronically, mechanically, or in other forms.

[0389] Units described as separate parts may or may not be physically separated. Parts shown as units may or may not be physical units, may be located in one place, or may be distributed among multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solution of the embodiment.

[0390] Furthermore, the functional units in the embodiments of the present invention may be integrated into a single processing unit, or each unit may exist physically independently, or two or more units may be integrated into a single unit.

[0391] When a function is implemented in the form of a software function unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on this understanding, any technical solution or part of a technical solution of the present application that contributes basically or partially to the prior art may be implemented in the form of a software product. The software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, server, network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium capable of storing program code, such as a USB flash drive, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0392] The order of steps in the embodiments of this application may be adjusted, combined, or deleted based on actual requirements.

[0393] The modules of the equipment in the embodiments of this application may be combined, separated, and removed based on actual requirements.

[0394] In other words, the embodiments described above are intended solely to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the embodiments described above, those skilled in the art should understand that they may modify the technical solutions described in the embodiments described above, or make equivalent substitutions to some of their technical features, without departing from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A data transmission device, comprising a transceiver unit configured to receive a single-user physical layer protocol data unit (SU PPDU), wherein the bandwidth for the SU PPDU is greater than 20 MHz, the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carries a first content channel of the extremely high throughput signaling (EHT-SIG) field of the SU PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field. The data transmission device further comprises: a universal signal (U-SIG) overflow field carried by the first (i-1) information bits of the first content channel is the same as the U-SIG overflow field carried by the first (i-1) information bits of the second content channel; the i-th to j-th information bits of the first content channel carry a user field, where both i and j are positive integers and 1 < i < j.

2. The i-th to j-th information bits of the second content channel carry a padding field, according to the data transmission device of Claim 1.

3. The i-th to j-th information bits of the second content channel carry a user field, and the user field of the first content channel is the same as the user field of the second content channel, according to the data transmission device of Claim 1.

4. The user field of the EHT-SIG field includes an association identifier (AID) field, and the AID field is used to uniquely identify a station, according to the data transmission device of Claim 2.

5. The SU PPDU includes a universal signal (U-SIG) field, the U-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than 1 information bit, according to the data transmission device of Claim 4.

6. The EHT-SIG field includes a spatial reuse indication field, according to the data transmission device of Claim 5.

7. ​ The PPDU format indication field of the data transmission device according to claim 6 includes information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple access (MU non-OFDMA), or MU orthogonal frequency division multiple access (MU OFDMA), or includes information indicating a trigger-based (TB) frame.

8. The U-SIG field of the data transmission device according to claim 7 includes one or more of the following: a physical layer version indicator field, an uplink / downlink (UL / DL) indication field, a basic service set color (BBS color) indication field, a transmission opportunity (TXOP) indication field, a bandwidth indication field, and the PPDU format indication field.

9. A data transmission device, A transceiver unit configured to receive a multi-user physical layer protocol data unit (MU PPDU), wherein the bandwidth for transmitting the MU PPDU is greater than 20 MHz, the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carries a first content channel of the extremely high throughput signaling (EHT-SIG) field of the MU PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field, the transceiver unit is included, The universal signal (U-SIG) overflow field carried by the first (i - 1) information bits of the first content channel is the same as the U-SIG overflow field carried by the first (i - 1) information bits of the second content channel, and the i-th information bit to the j-th information bit of the first content channel carry a resource unit allocation indication field and a user field, where both i and j are positive integers and 1 < i < j, the data transmission device.

10. The i-th information bit to the j-th information bit of the second content channel carry a resource unit allocation indication field and a user field, where both i and j are positive integers and i < j, the data transmission device according to claim 9.

11. The i-th information bit to the j-th information bit of the second content channel carry a padding field, the data transmission device according to claim 10.

12. The data transmission device according to claim 10, wherein the EHT-SIG field includes one or more of the following fields: the number of ultra-high throughput long training (EHT-LTF) field symbols, the number of spatial streams indicator field, the modulation and coding scheme indicator field, the coding indicator field, and the beamforming indicator field.

13. The data transmission device according to claim 12, wherein the user field of the EHT-SIG field includes an association identifier (AID) field, the AID field being used to uniquely identify a station.

14. The data transmission device according to claim 13, wherein the MU PPDU includes a universal signal (U-SIG) field, the U-SIG field includes a PPDU format instruction field, and the PPDU format instruction field occupies more than one information bit.

15. The data transmission device according to claim 14, wherein the EHT-SIG field includes a space reuse instruction field.

16. The data transmission device according to claim 15, wherein the PPDU format instruction field includes information indicating that the transmission scenario is SU, MU non-orthogonal frequency division multiple access (MU non-OFDMA), or MU orthogonal frequency division multiple access (MU OFDMA), or includes information indicating a trigger-based (TB) frame.

17. The data transmission device according to claim 16, wherein the U-SIG field includes one or more of the following: a physical layer version indicator field, an uplink / downlink (UL / DL) indicator field, a basic service set color (BBS color) indicator field, a transmit opportunity (TXOP) indicator field, a bandwidth indicator field, and the PPDU format indicator field.

18. The data transmission device according to claim 9, wherein the MU PPDU is a PPDU transmitted based on non-OFDMA.

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