Data transmission method and related apparatus

Abstract

To provide a signal transmission method by which a signal field in a physical layer protocol data unit (PPDU) transmits much more information, and a related apparatus.SOLUTION: A bandwidth for a network device to transmit a single user (SU) PPDU is larger than 20 MHz and includes first and second sub-bandwidths. The first sub-bandwidth carries a first content channel of an extra-high throughput signaling (EHT-SIG) field of the SUPPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field. A universal signal (U-SIG) overflow field carried by first (i-1) information bits of the first content channel is same as a U-SIG overflow field carried by first (i-1) information bits of the second content channel, and information bits from an (i)th information bit to a (j)th information bit of the first content channel carry a user field.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present application relates to the field of wireless local area network technology, and in particular to a data transmission method and related equipment. [Background technology]

[0002] In the related art, in a scenario where a network device performs single user (SU) transmission, a physical layer protocol data unit (PPDU) transmitted by the network device to a station (STA) includes a legacy preamble, a high efficient signaling field A (HE-SIG-A), and data. In a scenario where a network device performs multiple user (MU) transmission, a physical layer protocol data unit (PPDU) transmitted by the network device to a station (STA) includes a legacy preamble, a HE-SIG-B, and data. HE-SIG-A and HE-SIG-B indicate signaling information required to demodulate the subsequent data field. It can be seen that the PPDU transmitted by the network device includes HE-SIG-B only in the MU transmission scenario. As a result, STAs must use two significantly different reception policies to receive PPDUs in the SU transmission scenario and PPDUs in the MU transmission scenario. In addition, the number of bits in the HE-SIG-A is limited. As a result, the information transmitted in the HE-SIG-A is limited in the SU scenario. Summary of the Invention

[0003] The embodiments of the present application provide a data transmission method and related equipment, which allows the signal field in the PPDU to carry more information.

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

[0005] The network device generates a first physical layer protocol data unit (PPDU), the PPDU including a first universal signaling field (U-SIG field) and a first very high throughput signaling field (EHT-SIG field), and the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is less than or equal to 78 information bits.

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

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

[0008] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, which is used to uniquely identify a station, for example, the identifier designation field is used to uniquely identify a station within 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 indication field, and the PPDU format indication field occupies more than one information bit; or The first demodulation indication field includes a spatial reuse indication field.

[0009] In this way, the technical solution of the implementation of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is equal to or less than 78 information bits, which reduces the indication overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead.

[0010] It should be noted that the names of the first EHT-SIG field and the second EHT-SIG field in the implementation of the present application are determined according to the 802.11be standard. The names of the first EHT-SIG field and the second EHT-SIG field in this implementation of the present application may also be the names of related SIG fields in other standard versions. The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of the present application are not limited to SIG fields related to the 802.11be standard. The names of the first EHT-SIG field and the second EHT-SIG field in this implementation of the present 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 indication field. The identifier indication field is an association identifier (AID) for uniquely identifying one station in a basic service set including the network device. In this way, the identifier indication field included in the encoded first PPDU can uniquely indicate one STA. From the first U-SIG field and the first EHT-SIG field, the STA can know whether the encoded first PPDU is transmitted to the STA without continuing to receive a subsequent preamble data field. This reduces the power consumption of the station. In addition, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not correctly received, 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, so that the station can perform Hybrid Automatic Repeat Request (HARQ) combined reception based on the subsequent retransmission. Furthermore, a third-party device can know the sender and receiver of the first PPDU without causing interference to a device performing transmission, which helps the third-party device perform scheduling.

[0012] In another possible implementation, the field contained in the first U-SIG field or the first EHT-SIG field, which indicates the PPDU format, occupies more than one information bit. In this case, compared to a solution in which only one information bit is occupied for the information bit indicating the PPDU format, in the implementation of the present application, the PPDU format indication field occupies more than one information bit. In this way, the PPDU format indication field can carry more information and therefore support more functions.

[0013] The PPDU format indication 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 performed and use the corresponding reception policy.

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

[0015] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support a spatial reuse function.

[0016] Optionally, the spatial reuse indication field is 2 information bits in length. The spatial reuse indication field includes the following four items: The spatial reuse indication field may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication 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 the uncoded second PPDU is equal to the number of information bits of the first U-SIG field, and both the number of information bits of the first U-SIG field and the number of information bits of the second U-SIG field are equal to or less than 52 information bits. 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 of the first U-SIG field of the first PPDU transmitted by the network device to the station in the SU scenario is equal to the number of information bits of the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the reception policy of receiving the first U-SIG field by the station in the SU scenario and the reception policy of receiving the second U-SIG field by the station in the MU scenario, and helps the station to 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 indication field. The identifier indication field includes a first indication subfield and a second indication subfield. The first U-SIG field includes the first indication subfield, and the first EHT-SIG field includes the second indication subfield. In this manner, idle information bits of the first U-SIG field and the first EHT-SIG field are fully used to avoid increasing the number of information bits in the first U-SIG field or the first EHT-SIG field, which are required to indicate a unique station identifier.

[0019] In some implementations, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and 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. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive the first part of information bits. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate PPDUs.

[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 one of the following: The field may include one or more of a physical layer version indication field, an uplink / downlink indication field, a basic service set color indication field, a transmission opportunity indication field, a bandwidth indication field, a PPDU format indication field, a space-time block coding indication field, a spatial reuse indication field, a protection interval and very high throughput long training field size indication field, a low density parity check additional symbol segment indication field, a pre-forward error correction padding factor indication field, a packet extension ambiguity indication field, and a preamble puncturing indication field.

[0021] In some implementations, the second EHT-SIG field of the second uncoded PPDU includes a station identifier indication field, and the field type of the field following the second indication subfield of the first EHT-SIG field is the same as the field type of the field following the station identifier indication field of the second EHT-SIG field. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive information bits following the station identifier indication field. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate the PPDU.

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

[0023] In some implementations, a starting information bit of the first indication subfield is the Nth information bit of the first U-SIG field, and a field type of a field after the Nth information bit of the second U-SIG field and a field type of a field before the station identifier indication field of the second EHT-SIG field are as follows: The field includes one or more of a field indicating the number of EHT-SIG field symbols or the number of multi-user multiple-input multiple-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 very high throughput long training field EHT-LTF symbols, midamble period, and Doppler, a resource unit allocation indication field, a preamble puncturing indication field, and a center 26-tone resource unit (Center 26-tone Resource Allocation, Center 26-tone RU) indication field.

[0024] In some implementations, the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, a 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 fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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 above method, information bits are saved, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information.

[0026] According to a second aspect, an implementation of the present application 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 PPDU includes an EHT-SIG field, and the EHT-SIG field includes fields indicating a number of EHT-LTF symbols, a midamble period, and a Doppler. The fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, and a first string group including the first string indicates that Doppler does not exist, the first string indicates a number of EHT-LTF symbols, and each string of the first string group corresponds to one number of EHT-LTF symbols. the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler exists and that the midamble period is the second period, and 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. In this case, a string group including a string is used to indicate the Doppler and the midamble period, and the value of the string indicates the number of EHT-LTF symbols. This can save information bits indicating the Doppler and the midamble period.

[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 fields are 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, 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 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. In this way, 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, the 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 on the first content channel, and the other part is transmitted on 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, the implementation of the present application provides a data transmission method. The method includes: A network device generates a PPDU, and the network device transmits the PPDU to a station. A 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 a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field. In this way, a user field of the first content channel is the same as a user field of the second content channel. In this case, the user field is duplicated in the first content channel and the second content channel, so that the probability of correct reception by the station can be increased, and reliability can be improved.

[0031] According to a seventh aspect, the present invention provides a data transmission method.

[0032] The station receives a first PPDU transmitted by the network device; The station decodes the first PPDU 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.

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

[0034] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, and the identifier designation field is used to uniquely identify a station, for example, the identifier designation field 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 indication field, and the PPDU format indication field occupies more than one information bit; or The first demodulation instruction field includes a spatial reuse instruction field.

[0035] In this way, the technical solution of the implementation of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is not more than 78 information bits, which reduces the indication overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead, so that 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 indication field. The identifier indication field is an association identifier (AID) for uniquely identifying one station in a basic service set including the network device. In this way, the identifier indication field included in the encoded first PPDU can uniquely indicate one STA. From the first U-SIG field and the first EHT-SIG field, the STA can know whether the encoded first PPDU is transmitted to the STA without continuing to receive a subsequent preamble data field. This reduces the power consumption of the station. In addition, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not correctly received, 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, so that the station can perform Hybrid Automatic Repeat Request (HARQ) combined reception based on the subsequent retransmission. Furthermore, a third-party device can know the sender and receiver of the first PPDU without causing interference to a device performing transmission, which helps the third-party device perform scheduling.

[0037] In another possible implementation, the field contained in the first U-SIG field or the first EHT-SIG field, which indicates the PPDU format, occupies more than one information bit. In this case, compared to a solution in which only one information bit is occupied for the information bit indicating the PPDU format, in the implementation of the present application, the PPDU format indication field occupies more than one information bit. In this way, the PPDU format indication field can carry more information and therefore support more functions.

[0038] The PPDU format indication 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 performed and use the corresponding reception policy.

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

[0040] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support a spatial reuse function.

[0041] Optionally, the spatial reuse indication field is 2 information bits in length. The spatial reuse indication field includes the following four items: The spatial reuse indication field may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication 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 of the first U-SIG field, and both the number of information bits of the first U-SIG field and the number of information bits of the second U-SIG field are equal to or less than 52 information bits. 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 of the first U-SIG field of the first PPDU transmitted by the network device to the station in the SU scenario is equal to the number of information bits of the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the reception policy of receiving the first U-SIG field by the station in the SU scenario and the reception policy of receiving the second U-SIG field by the station in the MU scenario, and helps 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 indication field. The identifier indication field includes a first indication subfield and a second indication subfield. The first U-SIG field includes the first indication subfield, and the first EHT-SIG field includes the second indication subfield. In this manner, idle information bits of the first U-SIG field and the first EHT-SIG field are fully used to avoid increasing the number of information bits in the first U-SIG field or the first EHT-SIG field, which are required to indicate a unique station identifier.

[0044] In some implementations, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and 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. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive the first part of information bits. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate PPDUs.

[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 one of the following: The field may include one or more of a physical layer version indication field, an uplink / downlink indication field, a basic service set color indication field, a transmission opportunity indication field, a bandwidth indication field, a PPDU format indication field, a space-time block coding indication field, a spatial reuse indication field, a protection interval and very high throughput long training field size indication field, a low density parity check additional symbol segment indication field, a pre-forward error correction padding factor indication field, a packet extension ambiguity indication field, and a preamble puncturing indication field.

[0046] In some implementations, the second EHT-SIG field of the second uncoded PPDU includes a station identifier indication field, and the field type of the field following the second indication subfield of the first EHT-SIG field is the same as the field type of the field following the station identifier indication field of the second EHT-SIG field. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive information bits following the station identifier indication field. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate the PPDU.

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

[0048] In some implementations, a starting information bit of the first indication subfield is the Nth information bit of the first U-SIG field, and a field type of a field after the Nth information bit of the second U-SIG field and a field type of a field before the station identifier indication field of the second EHT-SIG field are as follows: The field includes one or more of a field indicating the number of EHT-SIG field symbols or the number of multi-user multiple-input multiple-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 very high throughput long training field EHT-LTF symbols, midamble period, and Doppler, a resource unit allocation indication field, a preamble puncturing indication field, and a center 26-tone resource unit (Center 26-tone Resource Allocation, Center 26-tone RU) indication field.

[0049] In some implementations, the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, a 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 fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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] In this way, in the above method, information bits are saved, the first EHT-SIG field and the second EHT-SIG field can carry more information, and the station can obtain more information.

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

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

[0053] The PPDU includes an EHT-SIG field, and the EHT-SIG field includes fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, and a first string group including the first string indicates that Doppler does not exist, the first string indicates the number of EHT-LTF symbols, and each string of the first string group corresponds to one number of EHT-LTF symbols. the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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] 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 in the fields 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.

[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 fields in the first content channel and the second content channel are replicated, the correct reception probability 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 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. In this way, the length of the first content channel is the same as the length of the second content channel. This helps the station to 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 on the first content channel, and the other part is transmitted on 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, the implementation of the present application further provides a data transmission method. The method includes: a station receives a PPDU transmitted by a network device; a 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 a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field; in this way, a user field of the first content channel is the same as a user field of the second content channel; in this case, the user field is duplicated in the first content channel and the second content channel, so that the probability of correct reception by the station can be increased, and reliability can be improved.

[0059] According to a thirteenth aspect, the present invention further provides a network device, comprising: a processing unit configured to generate a first PPDU, the first PPDU including a first universal signaling field (U-SIG field) and a first very high throughput signaling field (EHT-SIG field), wherein a sum of a number of information bits of the first U-SIG field and a number of information bits of the first EHT-SIG field is less than or equal to 78 information bits; a transceiver unit configured to transmit the first encoded PPDU to a station; Includes.

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

[0061] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, and the identifier designation field is used to uniquely identify a station, for example, the identifier designation field 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 indication field, and the PPDU format indication field occupies more than one information bit; or The first demodulation instruction field includes a spatial reuse instruction field.

[0062] In this way, the technical solution of the implementation of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is equal to or less than 78 information bits, which reduces the indication overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead.

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

[0064] In another possible implementation, the field contained in the first U-SIG field or the first EHT-SIG field, which indicates the PPDU format, occupies more than one information bit. In this case, compared to a solution in which only one information bit is occupied for the information bit indicating the PPDU format, in the implementation of the present application, the PPDU format indication field occupies more than one information bit. In this way, the PPDU format indication field can carry more information and therefore support more functions.

[0065] The PPDU format indication 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 performed and use the corresponding reception policy.

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

[0067] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support a spatial reuse function.

[0068] Optionally, the spatial reuse indication field is 2 information bits in length. The spatial reuse indication field includes the following four items: The spatial reuse indication field may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication 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 the uncoded second PPDU is equal to the number of information bits of the first U-SIG field, and both the number of information bits of the first U-SIG field and the number of information bits of the second U-SIG field are equal to or less than 52 information bits. 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 of the first U-SIG field of the first PPDU transmitted by the network device to the station in the SU scenario is equal to the number of information bits of the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the reception policy of receiving the first U-SIG field by the station in the SU scenario and the reception policy of receiving the second U-SIG field by the station in the MU scenario, and helps the station to 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 indication field. The identifier indication field includes a first indication subfield and a second indication subfield. The first U-SIG field includes the first indication subfield, and the first EHT-SIG field includes the second indication subfield. In this manner, idle information bits of the first U-SIG field and the first EHT-SIG field are fully used to avoid increasing the number of information bits in the first U-SIG field or the first EHT-SIG field, which are required to indicate a unique station identifier.

[0071] In some implementations, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and 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. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive the first part of information bits. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate PPDUs.

[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 one of the following: The field may include one or more of a physical layer version indication field, an uplink / downlink indication field, a basic service set color indication field, a transmission opportunity indication field, a bandwidth indication field, a PPDU format indication field, a space-time block coding indication field, a spatial reuse indication field, a protection interval and very high throughput long training field size indication field, a low density parity check additional symbol segment indication field, a pre-forward error correction padding factor indication field, a packet extension ambiguity indication field, and a preamble puncturing indication field.

[0073] In some implementations, the second EHT-SIG field of the second uncoded PPDU includes a station identifier indication field, and the field type of the field following the second indication subfield of the first EHT-SIG field is the same as the field type of the field following the station identifier indication field of the second EHT-SIG field. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive information bits following the station identifier indication field. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate the PPDU.

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

[0075] In some implementations, a starting information bit of the first indication subfield is the Nth information bit of the first U-SIG field, and a field type of a field after the Nth information bit of the second U-SIG field and a field type of a field before the station identifier indication field of the second EHT-SIG field are as follows: The field includes one or more of a field indicating the number of EHT-SIG field symbols or the number of multi-user multiple-input multiple-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 very high throughput long training field EHT-LTF symbols, midamble period, and Doppler, a resource unit allocation indication field, a preamble puncturing indication field, and a center 26-tone resource unit (Center 26-tone Resource Allocation, Center 26-tone RU) indication field.

[0076] In some implementations, the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, a 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 fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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, in the above method, information bits are saved, allowing the first EHT-SIG field and the second EHT-SIG field to carry more information.

[0078] According to a fourteenth aspect, the present invention further provides a network device, comprising: a processing unit configured to generate a PPDU; a transceiver unit configured to transmit the PPDU to a station. The PPDU includes an EHT-SIG field, and the EHT-SIG field includes fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, and a first string group including the first string indicates that Doppler does not exist, the first string indicates the number of EHT-LTF symbols, and each string of the first string group corresponds to one number of EHT-LTF symbols. the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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, 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 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 which case the U-SIG overflow field is duplicated in the first content channel and the second content channel, thereby increasing the probability of correct reception by the station.

[0083] According to a sixteenth aspect, the present invention further provides a network device, comprising: a processing unit configured to generate a PPDU; a transceiver unit configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carrying a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carrying a second content channel of the EHT-SIG field.

[0084] The i information bits through the j information bits of the first content channel carry a user field, and the i information bits through the j information bits of the second content channel carry a padding field, where i and j are both positive integers, and <jである。

[0085] In this way, the length of the first content channel is the same as the length of the second content channel, which helps the station to receive the first content channel and the second content channel, and simplifies the reading process of the station, since the station does not need to read this padding field.

[0086] According to a seventeenth aspect, the present invention further provides a network device, comprising: a processing unit configured to generate a PPDU; a transceiver unit configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carrying a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carrying a 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 a user field of a first user includes the first sub-user field and the second sub-user field.

[0088] That is, in this implementation, part of the user field of the same user is transmitted in the first content channel and the other part is transmitted in the second content channel, which increases the number of information bits that carry the user field and allows more information to be transmitted.

[0089] According to an eighteenth aspect, the present invention further provides a network device, comprising: a processing unit configured to generate a PPDU; a transceiver unit configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carries a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field, such that a user field of the first content channel is the same as a 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 a nineteenth aspect, the present implementation further provides a station, the station comprising: a transceiver unit configured to receive a first PPDU transmitted by a network device; and a processing unit configured to decode the first PPDU 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 equal to or less than 78 information bits. The first U-SIG field and the first EHT-SIG field satisfy at least one of the following:

[0092] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, and the identifier designation field is used to uniquely identify a station, for example, the identifier designation field 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 indication field, and the PPDU format indication field occupies more than one information bit; or The first demodulation instruction field includes a spatial reuse instruction field.

[0093] In this way, the technical solution of the implementation of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is not more than 78 information bits, which reduces the indication overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead, so that 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 indication field. The identifier indication field is an association identifier (AID) for uniquely identifying one station. In this way, the identifier indication field included in the encoded first PPDU can uniquely indicate one STA. The STA can know from the first U-SIG field and the first EHT-SIG field whether the encoded first PPDU is transmitted to the STA without continuing to receive a subsequent preamble data field. This reduces the power consumption of the station. Also, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not correctly received, the station can determine that the first PPDU has been transmitted to the station based on the first U-SIG field and the first EHT-SIG field, so that the station can perform Hybrid Automatic Repeat Request (HARQ) combined reception based on the subsequent retransmission. Furthermore, the third party device can know the sender and the recipient of the first PPDU without causing interference to the device performing the transmission, which helps the third party device to perform the scheduling.

[0095] In another possible implementation, the field contained in the first U-SIG field or the first EHT-SIG field, which indicates the PPDU format, occupies more than one information bit. In this case, compared to a solution in which only one information bit is occupied for the information bit indicating the PPDU format, in the implementation of the present application, the PPDU format indication field occupies more than one information bit. In this way, the PPDU format indication field can carry more information and therefore support more functions.

[0096] The PPDU format indication 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 performed and use the corresponding reception policy.

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

[0098] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support a spatial reuse function.

[0099] Optionally, the spatial reuse indication field is 2 information bits in length. The spatial reuse indication field includes the following four items: The spatial reuse indication field may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication 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 of the first U-SIG field, and both the number of information bits of the first U-SIG field and the number of information bits of the second U-SIG field are equal to or less than 52 information bits. 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 of the first U-SIG field of the first PPDU transmitted by the network device to the station in the SU scenario is equal to the number of information bits of the second U-SIG field of the second PPDU transmitted by the network device in the MU scenario. This reduces the difference between the reception policy of receiving the first U-SIG field by the station in the SU scenario and the reception policy of receiving the second U-SIG field by the station in the MU scenario, and helps 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 indication field. The identifier indication field includes a first indication subfield and a second indication subfield. The first U-SIG field includes the first indication subfield, and the first EHT-SIG field includes the second indication subfield. In this manner, idle information bits of the first U-SIG field and the first EHT-SIG field are fully used to avoid increasing the number of information bits in the first U-SIG field or the first EHT-SIG field, which are required to indicate a unique station identifier.

[0102] In some implementations, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and 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. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive the first part of information bits. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate PPDUs.

[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 one of the following: The field may include one or more of a physical layer version indication field, an uplink / downlink indication field, a basic service set color indication field, a transmission opportunity indication field, a bandwidth indication field, a PPDU format indication field, a space-time block coding indication field, a spatial reuse indication field, a protection interval and very high throughput long training field size indication field, a low density parity check additional symbol segment indication field, a pre-forward error correction padding factor indication field, a packet extension ambiguity indication field, and a preamble puncturing indication field.

[0104] In some implementations, the second EHT-SIG field of the second uncoded PPDU includes a station identifier indication field, and the field type of the field following the second indication subfield of the first EHT-SIG field is the same as the field type of the field following the station identifier indication field of the second EHT-SIG field. In this way, when the station receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive information bits following the station identifier indication field. This helps to reduce the difference in reception policy for the station to receive U-SIG fields in different scenarios, and helps the station to receive and demodulate the PPDU.

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

[0106] In some implementations, a starting information bit of the first indication subfield is the Nth information bit of the first U-SIG field, and a field type of a field after the Nth information bit of the second U-SIG field and a field type of a field before the station identifier indication field of the second EHT-SIG field are as follows: The field includes one or more of a field indicating the number of EHT-SIG field symbols or the number of multi-user multiple-input multiple-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 very high throughput long training field EHT-LTF symbols, midamble period, and Doppler, a resource unit allocation indication field, a preamble puncture indication field, and a center 26-tone resource unit (Center 26-tone RU) indication field.

[0107] In some implementations, the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, a 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 fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of 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 Doppler is present and that the midamble 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] In this way, in the above method, information bits are saved, the first EHT-SIG field and the second EHT-SIG field can carry more information, and the station can obtain more information.

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

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

[0111] The PPDU includes an EHT-SIG field, and the EHT-SIG field includes fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler. The fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a first string, and a first string group including the first string indicates that Doppler does not exist, the first string indicates the number of EHT-LTF symbols, and each string of the first string group corresponds to one number of EHT-LTF symbols. the fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are a second string, a second string group including the second string indicates that Doppler is present and that the midamble period is a first period, the second string indicates the number of EHT-LTF symbols, and each string of the second string group corresponds to one number of EHT-LTF symbols; or The fields indicating the number of EHT-LTF symbols, the midamble period, and the Doppler are in the third string. The third string group including the third string indicates the presence of Doppler and that the midamble 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.

[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 a 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 a resource unit allocation indication field and 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, both i and j are positive integers, and i <jである。

[0116] According to a twenty-second aspect, the present implementation further provides a station including a processing unit and a transceiver unit.

[0117] The transceiver unit is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the PPDU being greater than 20 MHz, the bandwidth including a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carrying a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carrying a second content channel of the EHT-SIG field.

[0118] The i information bits through the j information bits of the first content channel carry a user field, and the i information bits through the j information bits of the second content channel carry a padding field, where i and j are both positive integers, and <jである。

[0119] According to a twenty-third aspect, the present implementation further provides a station including a processing unit and a transceiver unit.

[0120] The transceiver unit is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the PPDU being greater than 20 MHz, the bandwidth including a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carrying a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carrying a 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 a user field of a first user includes the first sub-user field and the second sub-user field.

[0122] According to a twenty-fourth aspect, the present implementation further provides a station including a processing unit and a transceiver unit.

[0123] The transceiver unit is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the PPDU being greater than 20 MHz, the bandwidth including a first sub-bandwidth and a second sub-bandwidth, the first sub-bandwidth carrying a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carrying a second content channel of the EHT-SIG field.

[0124] In this way, the user field of the first content channel will be the same as the user field of the second content channel.

[0125] According to a twenty-fifth aspect, the present implementation further provides a network device including a processor. The processor is coupled to a memory. When the processor executes a computer program or instructions in the memory, any one of the methods of the implementation of the first aspect is performed, or any one of the methods of the second aspect to the sixth aspect is performed.

[0126] According to a twenty-sixth aspect, the present implementation further provides a station including a processor. The processor is coupled to a memory. When the processor executes a computer program or instructions in the memory, the method of any of the seventh aspect implementations is performed, or the method of any one of the eighth to twelfth aspects is performed.

[0127] According to a twenty-seventh aspect, the present implementation further provides a computer-readable storage medium, the computer-readable storage medium storing computer instructions, the computer instructions instructing a network device to execute any one of the methods of the implementation of the first aspect, the computer instructions instructing a network device to execute any one of the methods of the implementation of the second aspect to the sixth aspect, the computer instructions instructing a station to execute any one of the methods of the implementation of the seventh aspect, or the computer instructions instructing a station to execute any one of the methods of the implementation of the eighth aspect to the twelfth aspect.

[0128] According to a twenty-eighth aspect, the present implementation further provides a computer program product. The computer program product includes a computer program. When the computer program runs on a computer, the computer is enabled to execute any one of the methods of the implementation of the first aspect, the computer is enabled to execute any one of the methods of the implementation of the second aspect to the sixth aspect, the computer is enabled to execute any one of the methods of the implementation of the seventh aspect, or the computer is enabled to execute any one of the methods of the implementation of the eighth aspect to the twelfth aspect.

[0129] According to a twenty-ninth aspect, implementations of the present application further provide a communications device including an input circuit, an output circuit, and a processing circuit configured to receive signals via the input circuit and transmit signals via the output circuit to perform some or all of the steps of any one of the methods that may be performed by a network device or station in embodiments 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, for example but not limited to, a receiver, the signal output by the output circuit may be output to, for example but not limited to, a transmitter and transmitted by the transmitter, the input circuit and the output circuit may be the same circuit, and the circuit is used as the input circuit and the output circuit at different moments. The particular implementation of the processor and various circuits is not limited in this embodiment of the present application. [Brief description of the drawings]

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

[0132] [Diagram 2] FIG. 2 is a schematic diagram of a network architecture of another communication system according to an embodiment of the present application;

[0133] [Diagram 3] 1 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

[0134] [Figure 4A] FIG. 2 is a schematic diagram of a structure of a first U-SIG field and a first EHT-SIG field according to an embodiment of the present application;

[0135] [Figure 4B] FIG. 2 is a schematic diagram of a structure of a second U-SIG field and a second EHT-IG field according to an embodiment of the present application.

[0136] [Diagram 5] 4 is a schematic flowchart of a data transmission method according to another embodiment of the present application;

[0137] [Figure 6] 4 is a schematic flowchart of a data transmission method according to yet another embodiment of the present application;

[0138] [Figure 7] FIG. 2 is a schematic diagram of the structure of CC1 and CC2 according to an embodiment of the present application.

[0139] [Figure 8] FIG. 2 is a schematic diagram of the structure of CC1 and CC2 according to another embodiment of the present application.

[0140] [Figure 9] FIG. 13 is a schematic diagram of the structures of CC1 and CC2 according to yet another embodiment of the present application.

[0141] [Figure 10] FIG. 13 is a schematic diagram of the structures of CC1 and CC2 according to yet another embodiment of the present application.

[0142] [Figure 11] FIG. 2 is a schematic diagram of a module of a network device according to an embodiment of the present application;

[0143] [Figure 12] FIG. 2 is a schematic diagram of the structure of a network device according to another embodiment of the present application;

[0144] [Figure 13] FIG. 2 is a schematic diagram of the structure of a network device according to another embodiment of the present application;

[0145] [Figure 14] FIG. 2 is a schematic diagram of the structure of a network device according to another embodiment of the present application;

[0146] [Figure 15] FIG. 2 is a schematic diagram of the structure of a network device according to another embodiment of the present application;

[0147] [Figure 16]FIG. 2 is a schematic diagram of the structure of a network device according to another embodiment of the present application;

[0148] [Figure 17] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0149] [Figure 18] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0150] [Figure 19] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0151] [Figure 20] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0152] [Figure 21] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0153] [Figure 22] FIG. 2 is a schematic structural diagram of a station according to an embodiment of the present application;

[0154] [Diagram 23] FIG. 2 is a schematic diagram of the structure of a network device according to an embodiment of the present application;

[0155] [Figure 24] FIG. 2 is a schematic diagram of a station structure according to an embodiment of the present application;

[0156] [Diagram 25] 1 is a schematic diagram of the structure of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0157] The following describes the technical solution of the present application with reference to the accompanying drawings.

[0158] The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application are determined according to the 802.11be standard. The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application may alternatively be the names of the associated SIG fields of 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 the SIG fields associated with the 802.11be standard. The names of the first EHT-SIG field and the second EHT-SIG field in the implementation of this application may be used to refer to the SIG fields associated with any standard version.

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

[0160] The network device 110 transmits the PPDU to the STA 120. The STA 120 receives the PPDU and demodulates the data in the PPDU based on the U-SIG field and the EHT-SIG field in the PPDU.

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

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

[0163] An STA is a logical entity having IEEE 802.11 medium access control and physical layer functions, and is a general term for an access point and a non-access point station (non-AP STA).

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

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

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

[0167] S301: A network device generates a first PPDU.

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

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

[0170] In step S301, the PPDU generated by the network device can be understood to be an uncoded PPDU. The first U-SIG field and the first EHT-SIG field are both uncoded. The number of information bits is the number of uncoded bits. The sum of the number of bits of the first uncoded U-SIG field and the number of information bits of the first EHT-SIG field is less than or equal to 78 information bits. After generating the first PPDU, the network device can encode the first PPDU and then send 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, the 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 total number of bits in the first U-SIG field and the first EHT-SIG field of the encoded first PPDU is 156 bits, that is, the total number of Orthogonal Frequency Division Multiplexing (OFDM) symbols. If a different modulation scheme and a different coding rate are used, 156 bits can also be described as the equivalent number of symbols.

[0172] S303: The STA decodes the first PPDU to obtain a decoded first PPDU, where the decoded first PPDU includes a first U-SIG field and a first EHT-SIG field.

[0173] The first U-SIG field and the first EHT-SIG field satisfy at least one of the following: At least one of the first U-SIG field and the first EHT-SIG field includes an identifier indication field, and the identifier indication field is used to uniquely identify one STA; A field indicating a PPDU format and included 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 includes a spatial reuse indication field.

[0174] In the conventional technical solution corresponding to FIG. 2, the fields included in the U-SIG field in the SU transmission and the number of information bits of each field are the same as those in the MU transmission scenario, and some fields required during the MU transmission are not required in the SU scenario. Therefore, overhead is wasted and transmission resources cannot be fully used. Thus, compared with the conventional technical solution, the technical solution of the embodiment of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is not more than 78 information bits. This reduces the indication overhead. In addition, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead.

[0175] Specifically, in the example, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indication field. The identifier indication field is used to uniquely identify one STA. Specifically, the identifier indication field is specifically an Association Identifier (AID), and the AID can uniquely identify or indicate one station. The station is a station in a Basic Service Set (BSS) including the network device. In this way, the encoded first PPDU includes an identifier indication field used to indicate a unique STA. From the first U-SIG field and the first EHT-SIG field, the STA can know whether the encoded first PPDU is transmitted to the STA without continuing to receive the subsequent preamble data field. This reduces the power consumption of the STA. In addition, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not received correctly, the STA can determine that the first PPDU has been transmitted to the STA based on the first U-SIG field and the first EHT-SIG field, so that the STA can perform HARQ composite reception based on the subsequent retransmission. In addition, the third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing transmission, which helps the third-party device perform scheduling.

[0176] Specifically, the inclusion of an identifier designation field in at least one of the first U-SIG field and the first EHT-SIG field can be understood as follows: the first U-SIG field includes an identifier designation field, the first EHT-SIG field includes an identifier designation field, or the first U-SIG field and the first EHT-SIG field include an identifier designation field, the first U-SIG field includes a part of the identifier designation field, and the first EHT-SIG field includes another part of the identifier designation field.

[0177] The identifier indication field may indicate a unique STA. For example, when the network device transmits the first PPDU to one STA in a SU transmission scenario, the identifier indication field may uniquely indicate one STA.

[0178] Specifically, the identifier indication field is 11 information bits. In this way, the information bits of the identifier indication field can meet the requirements for information bits to uniquely identify one STA.

[0179] In another example, the field included in the first U-SIG field or the first EHT-SIG field, which indicates the PPDU format, occupies more than one information bit. In this case, compared with the solution in which only one information bit is occupied for the information bit indicating the PPDU format, in the embodiment of the present application, the PPDU format indication field occupies more than one information bit. In this way, the PPDU format indication field can carry more information and therefore support more functions.

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

[0181] In addition, the PPDU format indication 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 STA can determine whether SU transmission or MU transmission is performed and use the corresponding reception policy.

[0182] In yet another example, the first U-SIG field and the first EHT-SIG field may include a spatial reuse indication field, which may support a spatial reuse feature.

[0183] Specifically, the spatial reuse indication field includes the following four items: It may indicate one of the following: a parameterized spatial reuse DISALLOW (PSR_DISALLOW), a spatial reuse transmission prohibition (SR_RESTRICTED), a spatial reuse transmission delay (SR_DELAY), or a prohibition of 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 can be coded using a coding scheme agreed upon by the network device and the STA. For example, the modulation and coding scheme (MCS) used is MSC0, and dual carrier modulation (DCM) is not used. In this way, the first U-SIG field does not include the MCS and DCM indication fields of the EHT-SIG field, so that information bits can be saved, and the saved information bits can be used to carry other important information. The agreed coding scheme can be, for example, a coding scheme specified in a protocol.

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

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

[0187] Both the number of information bits of the first U-SIG field and the number of information bits of the second U-SIG field are equal to or less than 52 information bits. One OFDM symbol contains 52 information bits. The smaller number of information bits of the first U-SIG field and the second U-SIG field indicates that the number of information bits of the encoded first U-SIG field and the encoded second U-SIG field is smaller. In this case, in the encoded first PPDU, the OFDM symbols occupied by the U-SIG field are also reduced, so that wireless transmission resources can be saved.

[0188] In some implementations, the first U-SIG field and the first EHT-SIG field include an identifier indication field. The identifier indication field includes a first indication subfield and a second indication subfield. The first U-SIG field includes the first indication subfield and the first EHT-SIG field includes the second indication subfield. In this case, the identifier indication field is split into two parts. The first U-SIG field includes one part and the first EHT-SIG field includes the other part. In this way, the idle bits of the first U-SIG field and the first EHT-SIG field are fully used to avoid increasing the number of information bits in the first U-SIG field or the first EHT-SIG field, which are required to indicate a unique STA.

[0189] In some optional embodiments, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and the field type of the first (N-1) information bits of the first U-SIG field is correspondingly 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 before the first indication subfield of the first U-SIG field is the same as the field type of the first (N-1) information bits at the corresponding position of the second U-SIG field. In this way, when the STA receives the first U-SIG field in the SU scenario and receives the second U-SIG field in the MU scenario, the same policy is used to receive the first part of the information bits. This helps to reduce the difference in the receiving policy for the STA to receive the U-SIG field in different scenarios, and helps the STA to receive and demodulate the PPDU.

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

[0191] It should be noted that the above two optional embodiments can also be combined. For example, the starting information bit of the first indication subfield is the N-th information bit of the first U-SIG field, and the field type of the first (N-1) information bits of the first U-SIG field is correspondingly 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 uncoded second PPDU includes a STA indication field. The field type of the field following the second indication subfield of the first EHT-SIG field is the same as the field type of the field following the STA indication field of the second EHT-SIG field. In this way, when the STA receives the first U-SIG field in a SU scenario and receives the second U-SIG field in a MU scenario, the same policy is used to receive the information bits of the field following the second indication subfield and the information bits following the STA indication field. This helps reduce the difference in reception policy for STAs to receive U-SIG field in different scenarios, and helps STAs to receive and demodulate PPDU. The STA indication field may be, for example, an AID used to uniquely identify one STA.

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

[0193] Specifically, the field types of the first (N-1) information bits of the first U-SIG field and the field types of the first (N-1) information bits of the second U-SIG field are as follows: physical layer version (version identifier) ​​indication field, uplink / downlink (UL / DL) indication field, basic service set color (BSS color) indication field, transmission opportunity (TXOP) indication field, bandwidth indication field, PPDU format indication field, space time block code (STBC) indication field, spatial reuse indication field, guard interval (GI) and very high throughput long training field size (EHT-LTF Size) indication field, low density parity check extra symbol segment (LDPC extra symbol segment), pre-forward error correction padding factor (Pre-FEC Padding Factor) indication field, packet extension disambiguity (PE) indication field, and packet extension ambiguity (PE) indication field. disambiguity indication field, or 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 a color identifier of a BSS including a network device. The bandwidth indication field specifically indicates the bandwidth and preamble puncturing information of the packet. The PPDU format indication field specifically indicates a PPDU format. The STBC indication field specifically indicates whether space-time block coding is used for the data portion. The PE disambiguity indication field specifically indicates whether packet extension ambiguity exists.

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

[0196] The PPDU format indication field may be combined with the UL / DL indication field to indicate: if the UL / DL indication field indicates DL, the PPDU format indication field may indicate SU, MU non-OFDMA, or MU OFDMA, or if the UL / DL indication field indicates UL, the PPDU format indication field may indicate TB or null.

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

[0198] For example, the PPDU format indication field has two information bits. The PPDU format indication field can contain any one of the binary values ​​corresponding to 0 to 3. If the UL / DL indication field indicates DL, then 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 indication field indicates UL, then 00 indicates that the transmission scenario is SU, 01 indicates that the transmission scenario is TB, and 10 and 11 are reserved strings.

[0199] Alternatively, if the UL / DL indication field indicates DL, 00 indicates that the transmission scenario is SU non-punctured, 01 indicates that the transmission scenario is SU punctured, 10 indicates that the transmission scenario is MU non-OFDMA, and 11 indicates that the transmission scenario is MU OFDMA. Alternatively, if the UL / DL indication field indicates UL, 00 indicates that the transmission scenario is SU non-punctured, 01 indicates that 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 indication subfield in the first EHT-SIG field, and the field type of the field following the STA indication subfield in the second EHT-SIG field, are as follows: The field includes one or more of a field indicating the number of spatial-time streams (NSTS), midamble periodicity, and Doppler, a beamformed indication field, a beam change indication field, a field indicating whether a modulation and coding scheme (MCS) and dual coding modulation (DCM) are used, and a coding indication field.

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

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

[0203] The field indicating the number of EHT-LTF symbols, midamble periodcity, and doppler may include a subfield indicating the number of EHT-LTF symbols, a subfield indicating the midamble periodcity, and a subfield indicating the 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 the field indicating the MU-MIMO users specifically indicates the number of MU-MIMO users when the EHT-SIG field is in compressed mode, or indicates the number of EHT-SIG field symbols when the EHT-SIG field is in uncompressed mode. The EHT-SIG MCS and DCM indication field specifically indicates 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, the midamble periodity, and the doppler specifically indicate the number of EHT-LTF symbols, the midamble periodity, and whether Doppler is present.

[0205] Please refer to FIG. 4A. FIG. 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. Please refer to FIG. 4B. FIG. 4B is a schematic diagram of the structure of the second U-SIG field and the second EHT-SIG 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 number of user fields. The EHT MU transmission specific field may include, but is not limited to, a number of EHT-SIG field symbols, a field indicating an EHT-SIG MCS, and an EHT-SIG field DCM, and an RU allocation subfield. The field indicating the number of EHT-SIG field symbols, an EHT-SIG MCS, and an EHT-SIG field DCM may be a field indicating the number of EHT-SIG field symbols, an EHT-SIG MCS indication field, and an EHT-SIG field DCM indication field. The RU allocation subfield is optional. In an OFDMA transmission scenario, the second U-SIG field and the second EHT-SIG field include the RU allocation subfield.

[0206] The field type and the number of information bits of the common field included in the first U-SIG field and the first EHT-SIG field in Fig. 4A are the same as those of the common field included in the second U-SIG field and the second EHT-SIG field in Fig. 4B. The common field may be a field of the first (N-1) information bits of the first U-SIG field or a 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 a version identifier indication field, a UL / DL indication field, a BSS color indication field, a TXOP indication field, a bandwidth indication field, a PPDU format indication field, an STBC indication field, a spatial reuse indication field, a GI and EHT-LTF Size indication field, an LDPC Extra Symbol Segment indication field, a Pre-FEC Padding Factor indication field, and a PE disambiguity indication 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 FIG. 4A includes a first indication subfield of the first U-SIG field, a second indication subfield of the first EHT-SIG field, fields indicating NSTS, midamble periodicity, and doppler, a beamformed indication field, a beam change field, an MCS and DCM indication field, and a coding indication field.

[0210] The user field in FIG. 4A includes a STA indication subfield, fields indicating the NSTS, midamble periodicity, and doppler, a beamformed indication field, a beam change field, an MCS and DCM indication field, and a coding indication field.

[0211] In this embodiment of the present application, it can be seen that the main difference between the first U-SIG field and the first EHT-SIG field and 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 an EHT MU transmission specific field, which is not required in a 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 suitable.

[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, thereby making full use of the transmission resources in the SU transmission scenario.

[0213] In addition, in the present 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, so that the difference between the reception policy of the STA receiving the first U-SIG field and the first EHT-SIG field in the SU transmission scenario and the reception policy of the second U-SIG field and the second EHT-SIG field in the MU transmission scenario can be better controlled.

[0214] As a specific example, for the fields included in the first U-SIG field and the fields included in the second U-SIG field, refer to Tables 3 and 4. Table 3 shows the fields of 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 of the 27th information bit and the 52nd information bit 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 contents of the first 34 information bits (B0-B25 in Table 3 and B0-B7 in Table 4) of the first U-SIG field are the same as the contents of the second U-SIG field. The first information bit corresponds to B0, the second information bit corresponds to B1, and the same method is applied to the 8th information bit, which corresponds to B7. The first 8 information bits of the second symbol of the first U-SIG field and the first 8 information bits of the second U-SIG field correspond to B0-B7 of the second symbol of the first U-SIG field and B0-B7 of the second symbol of the second U-SIG field, respectively.

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

[0217] The version identifier field has 3 information bits, the DL / UL indication field has 1 information bit, the BSS color indication field has 6 information bits, the TXOP indication field has 7 information bits, the bandwidth indication field has 6 information bits, the PPDU format indication field has 2 information bits, the STBC indication field has 1 information bit, the spatial reuse indication field has 2 information bits, the fields indicating the GI and EHT-LTF size have 2 information bits, the LDPC Extra Symbol Segment indication field has 1 information bit, the PE disambiguity indication field has 1 information bit, and the Pre-FEC Padding Factor indication 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 of Table 1, or may be arranged in another order so long as the types of fields carried in corresponding information bits of the first U-SIG field and the second U-SIG field are correspondingly the same.

[0219] In addition, the 35th information bit (B8 in Table 4) to the 52nd information bit (B25 in Table 4) of the second symbol of the first U-SIG field includes a partial AID field, a cyclic redundancy code (CRC) indication field, and a tail indication field. The CRC indication field is used for information checking. The tail indication 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 above embodiment.

[0221] The 35th information bit (B8 in Table 4) to the 52nd information bit (B25 in Table 4) of the second U-SIG field includes a field indicating the number of EHT-SIG field symbols or MU-MIMO users, an EHT-SIG MCS and DCM indication field, a CRC indication field, and a tail indication field. The number of EHT-SIG field symbols or MU-MIMO users has 5 information bits, the EHT-SIG MCS and DCM indication field has 3 information bits, the CRC indication field has 4 information bits, and the tail indication field has 6 information bits.

[0222] For the fields included in the first EHT-SIG field and the fields included in the second EHT-SIG field, see Tables 5 and 6.

[0223] Table 5 shows the fields contained 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, a field indicating NSTS and doppler, an MCS indication field, a DCM indication field, a beam change field, a coding indication field, a beamformed indication field, a CRC indication field, and a tail indication field. The partial AID field has 3 information bits, the field indicating NSTS and doppler has 5 information bits, the MCS indication field has 4 information bits, the DCM indication field has 1 information bit, the beam change field has 1 information bit, the coding indication field has 1 information bit, the beamformed indication field has 1 information bit, the CRC indication field has 1 information bit, and the tail indication field has 6 information bits. The partial AID field of the first EHT-SIG field can be understood as the second indication subfield in the above embodiment.

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

[0226] It can be seen that in the SU transmission scenario, one part of the AID field is in the first U-SIG field, and the other part of the AID field is in the first EHT-SIG field. The number of information bits in one part of the AID field and the number of information bits in the other part of the AID field sum to 11 information bits. The STA can receive the first U-SIG field to obtain one part of the AID field, receive the first EHT-SIG field to obtain the other part of the AID, and obtain the 11 information bits of AID based on the one part of the AID field and the other part of the AID, and determine the STA that is uniquely identified by the AID.

[0227] Table 6 shows the fields contained 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 a field indicating the number of EHT-LTF symbols, a field indicating midamble periodity, and a doppler, a plurality of user fields, a CRC indication field, and a tail indication field. Each user field includes a field indicating AID, a field indicating NSTS and a doppler, an MCS indication field, a DCM indication field, a beam change field, a coding indication field, a beamformed indication field, a CRC indication field, and a tail indication field. Each of two user fields corresponds to one CRC indication field and one tail indication field. The fields indicating the number of EHT-LTF symbols, the midamble periodity, and a 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 a doppler, the MCS indication field, the DCM indication field, the beam change field, the coding indication field, the beamformed indication field, the CRC indication field, and the tail indication field corresponds to and is the same as the number of information bits in each field of the first EHT-SIG field. The AID in the second EHT-SIG field can be understood as the STA indication field in the above embodiment.

[0229] In the SU transmission scenario and the MU transmission scenario, it can be seen that the format of the U-SIG field is partially the same as the format of the EHT-SIG field, which helps the STA to receive the U-SIG field and the EHT-SIG field. In addition, some important fields are also included, such as the spatial reuse field. In addition, the PPDU format indication field has 2 information bits, so the field can carry more information. The AID field has 11 information bits, which can uniquely identify the STA in the BSS including the network device.

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

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

[0232] In an Orthogonal Frequency Division Multiplexing (OFDMA) transmission scenario, the second EHT-SIG field may include a resource unit allocation subfield indication field. In a non-OFDMA transmission scenario, the second EHT-SIG field may include a preamble puncturing indication field.

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

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

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

[0236] In this application, the fields in front of the identifier indication 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 is 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] As long as the field types of the first (N-1) fields of the first U-SIG field are correspondingly the same as the field types of the first (N-1) fields of the second U-SIG field, the order of the fields before the identifier indication field (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 restricted in this application.

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

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

[0240] In some embodiments, some of the fields may 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 may include one or more of the beamformed indication field, the DCM indication field, or the coding indication field. Alternatively, the number of information bits of the AID indication field may be reduced. The information bits saved in this way may be used to carry other information. For example, the number of information bits of the spatial reuse indication field may be increased, or the number of information bits of the preamble puncturing indication field may be increased.

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

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

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

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

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

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

[0247] The fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler may be in one of several cases:

[0248] A field indicating the number of EHT-LTF symbols, midamble periodity, and doppler is a first string, a first string group including the first string indicates that no Doppler is present, 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 a first substring group; The fields indicating the number of EHT-LTF symbols, the midamble periodicity, and the doppler are a second string, and a second string group including the second string indicates that Doppler exists and that the midamble period is a 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 substring group; or The fields indicating the number of EHT-LTF symbols, the midamble periodcity, and the doppler are the third string, the third string group including the third string indicates that Doppler is present and that 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 a 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 correspondence between the fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler and each of the following string groups: first string group, second string group, and third string group. [Table 7]

[0252] As shown in Table 6, the first string group may include binary values ​​corresponding to 0 to 8, and each binary value may indicate one number of EHT-LTF symbols. Specifically, the nine binary values ​​0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, and 1000 indicate that the number of EHT-LTF symbols is 1, 2, 4, 6, 8, 10, 12, 14, or 16, respectively. The first string group indicates that no doppler exists. In this case, any string in the first string group may indicate that no doppler exists based on the first string group including the string. That is, the nine binary values ​​0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, and 1000 may indicate that no doppler exists, respectively.

[0253] The second string group may include binary values ​​corresponding to 9 to 11, and each binary value corresponds 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 that the midamble period is period 1. In this case, each string in the second string group may indicate that a doppler exists and that the midamble period is the first period based on the second string group including the string. That is, each of the three binary values ​​1001, 1010, and 1011 may indicate that a doppler exists and that the midamble period is the first period.

[0254] The third string group may include binary values ​​corresponding to 12 to 14, and each binary value corresponds 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 that the midamble period is period 2. In this case, each string in the third string group may indicate that a doppler exists and that the midamble period is period 2 based on the third string group including the string. That is, each of the three binary values ​​1100, 1101, and 1110 may indicate that a doppler exists and that the midamble 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] Additional binary values ​​that can be conveyed by the 4 information bits include 1111, which can be reserved to indicate other information. This method of indication not only reduces the number of information bits, but also provides a degree of scalability.

[0257] In this case, a string group including the string indicates doppler and midamble periodicity, and the value of the string indicates the number of EHT-LTF symbols. Compared with a solution in which a 1-information bit field indicates doppler and a 4-information bit field indicates the number of EHT-LTF symbols and midamble periodicity, in this method, the Doppler indication field is omitted, and the number of information bits in the fields indicating the number of EHT-LTF symbols, midamble periodicity, and doppler can be reduced.

[0258] It should be noted that the embodiment of the data transmission method corresponding to FIG. 5 can be combined with the embodiment of the data transmission method corresponding to FIG.

[0259] Specifically, based on the embodiment of the data transmission method corresponding to Figure 3, each field 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 indication method of the fields indicating the number of EHT-LTF symbols, midamble periodicity, and doppler in the embodiment of the data transmission method corresponding to Figure 5.

[0260] Specifically, the fields indicating the number of EHT-LTF symbols, the midamble periodicity, and the doppler in the first EHT-SIG field and the second EHT-SIG field each have 4 information bits. The fields indicating the number of EHT-LTF symbols, the midamble periodicity, and the doppler may be any one of the following cases:

[0261] The fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler are a first string, and a first string group including the first string indicates that no doppler is present, 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, and the first string may be any string in the first substring group; The fields indicating the number of EHT-LTF symbols, the midamble periodcity, and the doppler are a second string, and a second string group including the second string indicates that a doppler exists and that the midamble periodcity 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, and the second string may be any string in the second substring group; or The fields indicating the number of EHT-LTF symbols, the midamble periodcity, and the doppler are the third string, the third string group including the third string indicates that a doppler is present and that the midamble periodity is the second period, the third string indicates the number of EHT-LTF symbols, each string in the third string group corresponds to one EHT-LT symbol number, and the third string may be any string in the third substring group.

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

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

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

[0265] S602: The network device transmits a 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, a resource unit allocation indication field is included in CC1. The resource unit allocation indication field can be transmitted only 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 structure of CC1 and CC2 according to an embodiment of the present application. 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: number of EHT-LTF symbols, midamble periodity, and doppler indication fields, DL / UL indication field, bandwidth indication field, PPDU format indication field, STBC indication field, spatial reuse indication field, LDPC Extra Symbol Segment indication field, PE disambiguity indication field, and Pre-FEC Padding Factor indication field.

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

[0271] The field of the i-th to j-th information bits of CC1 may be identical or different from the field of the i-th to j-th information bits of CC2. The following describes the possible cases of the fields of the i-th to j-th information bits of CC1 and CC2, where the i-th to j-th information bits 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.

[0272] In an embodiment, the field of the i-th information bit to the j-th information bit of CC2 may be the same as the field of the i-th information bit to the j-th information bit of CC1. That is, the i-th information bit to the j-th information bit of CC2 also carry the same user field. In this way, the user field is duplicated and transmitted in CC1 and CC2, so that the probability of correct reception by the STA can be increased, and the 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. In this way, the lengths of CC1 and CC2 are the same. This helps the STA to receive CC1 and CC2. Also, the STA does not need to read this padding field, which simplifies the reading process of the STA.

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

[0275] In yet another embodiment, the network device transmits a PPDU to multiple STAs in a MU scenario, where the i-th information bit to the j-th information bit of CC1 carry a part of the user field of each of the multiple STAs, and the information bits following the i-th information bit of CC2 carry another part 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 a MU scenario, where the i-th information bit to the j-th information bit of CC1 carry user fields of the multiple STAs, and the i-th information bit to the j-th information bit of CC2 carry 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 information bit to the j-th information bit of CC1 carry a user field, and the i-th information bit to the j-th information bit of CC2 carry a 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. In this way, since the STA does not have to read this padding field, the reading process of the STA can be simplified.

[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 only in one of CC1 or CC2.

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

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

[0282] 9 is a schematic diagram of the structures of CC1 and CC2 according to another embodiment of the present application. As shown in FIG. 9, in another possible embodiment, the user field of CC1 is the same as the user field of CC2. In this way, the user field is duplicated and transmitted in CC1 and CC2, so that the probability of correct reception by STA can be increased, and reliability can be improved.

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

[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 sub-user field, CC2 includes a second sub-user field, and the user field of the first user includes a first sub-user field and a second sub-user field. That is, in this embodiment, a part of the user field of the same user is transmitted by CC1, and another part is transmitted by CC2. This can increase the number of information bits that transmit the user field, and can transmit more information.

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

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

[0287] Please refer to FIG. 11. FIG. 11 is a schematic diagram of modules of a network device according to an embodiment of the present application. The network device 1100 includes: A processing unit 1101 configured to generate a first PPDU, the first PPDU including a first universal signaling field (U-SIG field) and a first very high throughput signaling field (EHT-SIG field), wherein a sum of a number of information bits of the first U-SIG field and a number of information bits of the first EHT-SIG field is less than or equal to 78 information bits; and a transceiver unit 1102 configured to transmit the first encoded PPDU to the station.

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

[0289] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, the identifier designation field being used to uniquely identify a station; The first U-SIG field or the first EHT-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than one information bit, or The first demodulation instruction field includes a spatial reuse instruction field.

[0290] In this way, the technical solution of the embodiment of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is not more than 78 information bits, which reduces the indication overhead. Moreover, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead.

[0291] In a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indication field. The identifier indication field is an association identifier (AID) for uniquely identifying one station. The station is a station in a basic service set (BSS) including the network device. In this way, the identifier indication field included in the encoded first PPDU can uniquely indicate one STA. From the first U-SIG field and the first EHT-SIG field, the STA can know whether the encoded first PPDU is transmitted to the STA without continuing to receive the subsequent preamble data field. This reduces the power consumption of the station. In addition, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not received correctly, the station can determine that the first PPDU has been transmitted to the station based on the first U-SIG field and the first EHT-SIG field, so that the station can perform Hybrid Automatic Repeat Request (HARQ) combined reception based on the subsequent retransmission. In addition, the third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing transmission. This helps the third-party device perform scheduling.

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

[0293] The PPDU format indication 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 performed and use the corresponding reception policy.

[0294] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support spatial reuse functionality.

[0295] Optionally, the spatial reuse indication field is two information bits in length. The spatial reuse indication field contains the following four items: It may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication field is used by stations to implement the corresponding spatial reuse feature.

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

[0297] Please refer to Fig. 12. Fig. 12 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 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, and the EHT-SIG field includes fields indicating number of EHT-LTF symbols, midamble periodcity, and doppler. The fields indicating number of EHT-LTF symbols, midamble periodcity, and doppler are a first string, and a first string group including the first string indicates that doppler does not exist, the first string indicates the number of EHT-LTF symbols, and each string of the first string group corresponds to one number of EHT-LTF symbols. The fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler are a second string, and a second string group including the second string indicates that a doppler is present and that 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 fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler are the third string, and the third string group including the third string indicates that a doppler is present and that the midamble 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.

[0298] In this case, to indicate the Doppler and midamble period, a string group including strings 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.

[0299] For details of the functional implementation and technical effects of the functional units of the network device 1200 provided in this embodiment, please 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 the 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 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 U-SIG overflow fields, in which case the U-SIG overflow field is duplicated in the first and second content channels, thus increasing the probability of correct reception by the station.

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

[0304] Please refer to Fig. 14. Fig. 14 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 1400, including a processing unit 1401 configured to generate a PPDU and a transceiver unit 1402 configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

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

[0306] In this way, the length of the first content channel will be the same as the length of the second content channel, which helps the station to receive the first and second content channels, and also simplifies the station's reading process, since the station does not need to read this padding field.

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

[0308] Please refer to Fig. 15. Fig. 15 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 1500, including a processing unit 1501 configured to generate a PPDU and a transceiver unit 1502 configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

[0309] 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 a first sub-user field and a second sub-user field.

[0310] That is, in this embodiment, a part of the user field of the same user is transmitted in the first content channel and another part is transmitted in the second content channel, which increases the number of information bits that transmit the user field, and thus allows more information to be transmitted.

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

[0312] Please refer to Fig. 16. Fig. 16 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 1600, including a processing unit 1601 configured to generate a PPDU and a transceiver unit 1602 configured to transmit the PPDU to a station. A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth. The first sub-bandwidth carries a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth 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.

[0313] 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.

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

[0315] Please refer to Fig. 17. Fig. 17 is a schematic diagram of modules of a station according to an embodiment of the present application. The embodiment of the present application is a station 1700, a transceiver unit 1702 configured to receive a first PPDU transmitted by a network device; a processing unit 1701 configured to decode the first PPDU to obtain a decoded first PPDU; The first decoded 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:

[0316] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, the identifier designation field being used to uniquely identify a station; The first U-SIG field or the first EHT-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than one information bit, or The first demodulation instruction field includes a spatial reuse instruction field.

[0317] In this way, the technical solution of the embodiment of the present application can ensure that the sum of the number of information bits of the first U-SIG field and the number of information bits of the first EHT-SIG field is not more than 78 information bits, which reduces the indication overhead. Furthermore, the first U-SIG field and the first EHT-SIG field can carry more information without increasing the indication overhead, so that the station can obtain more information from the first U-SIG field and the first EHT-SIG field.

[0318] Specifically, in a possible implementation, at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indication field. The identifier indication field is an association identifier (AID) for uniquely identifying one station. The station is a station in a basic service set (BSS) including the network device. In this way, the identifier indication field included in the encoded first PPDU can uniquely indicate one STA. From the first U-SIG field and the first EHT-SIG field, the STA can know whether the encoded first PPDU is transmitted to the STA without continuing to receive the subsequent preamble data field. This reduces the power consumption of the station. In addition, even if the next data field of the first U-SIG field and the next data field of the first EHT-SIG field are not received correctly, the station can determine that the first PPDU has been transmitted to the station based on the first U-SIG field and the first EHT-SIG field, so that the station can perform Hybrid Automatic Repeat Request (HARQ) combined reception based on the subsequent retransmission. In addition, the third-party device can know the sender and receiver of the first PPDU without causing interference to the device performing transmission. This helps the third-party device perform scheduling.

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

[0320] The PPDU format indication 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 performed and use the corresponding reception policy.

[0321] In yet another possible implementation, the first U-SIG field and the first EHT-SIG field include a spatial reuse indication field, which can support spatial reuse functionality.

[0322] Optionally, the spatial reuse indication field is two information bits in length. The spatial reuse indication field contains the following four items: It may indicate one of the following: Parameterized Spatial reuse DISALLOW (PSR_DISALLOW), Disable spatial reuse transmission (SR_RESTRICTED), Delay spatial reuse transmission (SR_DELAY), Disable both PSR-based spatial reuse and non-SR Group Overlapping Basic Service Set (OBSS) Packet Detection-based spatial reuse. The spatial reuse indication field is used by stations to implement the corresponding spatial reuse feature.

[0323] For the functional implementation details and technical effects of the functional units of the station 1700 provided in this embodiment, please refer to the relevant detailed description of the method provided in the above method embodiment, and the details will not be described again here.

[0324] Please refer to Fig. 18. Fig. 18 is a schematic diagram of modules of a station according to another embodiment of the present application. The embodiment of the present application further provides a station 1800, which includes a processing unit 1801 and a transceiver unit 1802.

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

[0326] The PPDU includes an EHT-SIG field, and the EHT-SIG field includes a field indicating the number of EHT-LTF symbols, a midamble periodcity, and a doppler. The field indicating the number of EHT-LTF symbols, the midamble periodcity, and the doppler is a first string, and a 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 fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler are a second string, and a second string group including the second string indicates that a doppler is present and that 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 fields indicating the number of EHT-LTF symbols, the midamble periodity, and the doppler are the third string, and the third string group including the third string indicates that a doppler is present and that the midamble 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.

[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, the Doppler, and the 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 the detailed functional implementation and technical effects of the functional units of the station 1800 provided in this embodiment, please 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 a resource unit allocation indication field and 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, both i and j are positive integers, and i <jである。

[0332] For the detailed implementation of the functions and technical effects of the functional units of the station 1900 provided in this embodiment, please refer to the relevant detailed description of the method provided in the above method embodiment, and the details will not be described again here.

[0333] Please refer to Fig. 20. Fig. 20 is a schematic diagram of modules of a station according to another embodiment of the present application. The embodiment of the present application further provides a station 2000, which includes a processing unit 2001 and a transceiver unit 2002.

[0334] The transceiver unit 2002 is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the 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 an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

[0335] The i to j information bits of the first content channel carry a user field, and the i to j information bits of the second content channel carry a padding field, where i and j are both positive integers, and i <jである。

[0336] For the functional implementation details and technical effects of the functional units of the station 2000 provided in this embodiment, please refer to the relevant detailed description of the method provided in the above method embodiment, and the details will not be described again here.

[0337] Please refer to Fig. 21. Fig. 21 is a schematic diagram of modules of a station according to another embodiment of the present application. The embodiment of the present application further provides a station 2100, which includes a processing unit 2101 and a transceiver unit 2102.

[0338] The transceiver unit 2102 is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the 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 an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

[0339] 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 a first sub-user field and a second sub-user field.

[0340] For the functional implementation details and technical effects of the functional units of the station 2100 provided in this embodiment, please refer to the relevant detailed description of the method provided in the above method embodiment, and the details will not be described again here.

[0341] Please refer to Fig. 22. Fig. 22 is a schematic diagram of modules of a station according to another embodiment of the present application. The embodiment of the present application further provides a station 2200, which includes a processing unit 2201 and a transceiver unit 2202.

[0342] The transceiver unit 2202 is configured to receive a PPDU transmitted by a network device, the bandwidth for receiving the PPDU is larger 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 an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

[0343] The user field of the first content channel will be the same as the user field of the second content channel.

[0344] For the functional implementation details and technical effects of the functional units of the station 2200 provided in this embodiment, please refer to the relevant detailed description of the method provided in the above method embodiment, and the details will not be described again here.

[0345] Figure 23 is a schematic diagram of the structure of a network device according to an embodiment of the present application. Please refer to Figure 23. Figure 23 provides an overview of a possible basic hardware architecture of a network device according to the present application.

[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 processor 2310 receiving or transmitting the following message may be specifically understood as the processor 2310 receiving or transmitting the message using the transceiver. Optionally, the transceiver 2320 may be a transceiver circuit.

[0349] The memory 2330 may be a memory of the network device 2300 or an external memory connected to the processor 2310. The memory 2330 may be a physically separate unit or may be integrated into the processor 2310. The memory 2330 includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), or a flash memory, or a cache. The memory 2330 is configured to store relevant instructions and data, and may transmit the stored data to the processor 2310.

[0350] Specifically, the processor 2310 and the transceiver 2320 of the network device 2300 in this embodiment can be understood as a processing unit and a transceiver unit in the embodiments 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 the memory 2330, and execute some or all of the steps performed by the network device in any one of the above-mentioned method embodiments. For relevant descriptions and technical effects of the instructions performed by the processor of the network device 2300, please refer to the above-mentioned method embodiments. Details will not be described again here.

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

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

[0354] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, the identifier designation field being used to uniquely identify a station; The first U-SIG field or the first EHT-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than one information bit, or The first demodulation instruction field includes a spatial reuse instruction field.

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

[0356] A bandwidth for transmitting the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, where the first sub-bandwidth carries a first content channel of the EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

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

[0358] The i-th to j-th information bits of the first content channel carry a user field, 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である、 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, and the ... <jである、 The i-th to j-th information bits of the first content channel carry a user field, and the i-th to j-th information bits of the second content channel carry a padding field, where both i and j are positive integers, and i <jである、 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, or The user fields of the first content channel are the same as the user fields of the second content channel; Satisfy at least one of the following:

[0359] Figure 24 is a schematic structural diagram of a station according to an embodiment of the present application. Please refer to Figure 24. Figure 24 provides an overview of a possible basic hardware architecture of a station according to the present application.

[0360] The station 2400 includes at least a processor 2410 and a transceiver 2420. The processor 2410 is coupled to a memory 2430. The processor 2410, the transceiver 2420, and the memory 2430 are coupled to each other via a 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 may be specifically understood as the processor 2410 receiving or transmitting the messages using the transceiver.

[0363] The memory 2430 may be a memory of the station 2400 or an external memory connected to the processor 2410. The memory 2430 may be a physically separate unit or may be integrated into the processor 2410. The memory 2430 includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), or a flash memory, or a cache. The memory 2430 is configured to store relevant instructions and data and may transmit the stored data to the processor 2410.

[0364] In particular, the processor 2310 and the transceiver 2320 of the station 2400 in this embodiment can be understood as a processing unit and a transceiver unit in the embodiments corresponding to any one of FIGS.

[0365] The processor 2410 may read relevant instructions in the memory 2430 and implement some or all of the steps performed by the STA in any one of the methods provided in the embodiments of the present application. For the relevant description and technical effects of the instructions performed by the processor of the station 2400, please refer to the above-mentioned embodiment of the method. The details will not be described again here.

[0366] For example, the processor 2410 of the STA 2400 is configured to read relevant instructions in the memory 2430 to perform the following operations: Receive a first PPDU transmitted by a network device via the transceiver 2320; Decode the first PPDU, where the decoded first PPDU 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:

[0368] At least one of the first U-SIG field and the first EHT-SIG field includes an identifier designation field, the identifier designation field being used to uniquely identify a station; The first U-SIG field or the first EHT-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than one information bit, or The first demodulation instruction field includes a spatial reuse instruction field.

[0369] As another example, the processor 2410 of the STA 2400 is configured to read relevant instructions in the memory 2430 and perform the following operations: Receive a PPDU sent by a network device.

[0370] A bandwidth for receiving the PPDU is larger than 20 MHz, and the bandwidth includes a first sub-bandwidth and a second sub-bandwidth, where the first sub-bandwidth carries a first content channel of an EHT-SIG field of the PPDU, and the second sub-bandwidth carries a second content channel of the EHT-SIG field.

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

[0372] The i-th to j-th information bits of the first content channel carry a user field, 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である、 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, and the ... <jである、 The i-th to j-th information bits of the first content channel carry a user field, and the i-th to j-th information bits of the second content channel carry a padding field, where both i and j are positive integers, and i <jである、 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, or The user fields of the first content channel are the same as the user fields of the second content channel; Satisfy at least one of the following:

[0373] 25 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The embodiment of the present application 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 through the input circuit 2501 and transmit a signal through the output circuit 2502, so as to implement some or all of the steps of any one of the methods that may be performed by the network device or STA in the embodiment of the present application.

[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, for example but not limited to, a receiver, the signal output by the output circuit may be output to, for example but not limited to, a transmitter and transmitted by the transmitter, the input circuit and the output circuit may be the same circuit, and the circuit is used as an input circuit and an output circuit at different moments. The particular implementation of the processor and various circuits is not limited in this embodiment of the present application.

[0375] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program (which may also be called code or instruction). When the computer program is executed on a computer, the computer is enabled to execute some or all of the steps of any one of the methods that may be executed by a network device or a STA in the embodiment of the present application.

[0376] An embodiment of the present application further provides a computer program product including instructions, which, when executed on a computing device, enable the computing device to perform some or all of the steps of any one of the methods that may be performed by a network device or a STA.

[0377] In an embodiment, the network device in FIG. 1 or FIG. 2 is an access point (AP). The access point may be an access point for a terminal device (e.g., a mobile phone) to enter a wired (or wireless) network, and is mainly deployed in a home, a building, or a campus. A typical coverage radius is tens of meters to hundreds of meters. Of course, the access point may be deployed outdoors. The access point is equivalent to a bridge that connects 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 a 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 the 802.11be standard, the 802.11ax standard, the 802.11ac standard, the 802.11n standard, the 802.11g standard, the 802.11b standard, the 802.11a standard, etc. The access point of the present application may be a high efficient (HE) AP or an extremely high throughput (EHT) AP, or may be an access point applicable to future Wi-Fi standards.

[0378] In yet another embodiment, the network device of FIG. 1 or FIG. 2 may be a non-access point station. -A station is an access point station (non-APSTA). The station may be a wireless communication chip, a wireless sensor, a wireless communication terminal, or the like, and may be called a user. For example, the station may be a mobile phone capable of Wi-Fi communication, a tablet computer capable of Wi-Fi communication, a set-top box capable of Wi-Fi communication, a smart TV capable of Wi-Fi communication, an intelligent wearable device capable of Wi-Fi communication, an in-vehicle communication device capable of Wi-Fi communication, or a computer capable of Wi-Fi communication. Optionally, the station may support the 802.11be standard. The station may support multiple wireless local area networks (WLAN) standards of the 802.11 family, such as the 802.11be standard, the 802.11ax standard, the 802.11ac standard, the 802.11n standard, the 802.11g standard, the 802.11b standard, and the 802.11a standard. The stations of this application may be high efficient (HE) STAs or extremely high throughput (EHT) STAs, or may be STAs applicable to future Wi-Fi standards.

[0379] For example, the access points and stations may alternatively be devices applied in the Internet of Vehicles, Internet of Things nodes or sensors in the Internet of Things (IoT), sensors in a smart city, or smart cameras, smart remote controls, and smart water meters in a smart home.

[0380] The access points and stations may alternatively be communication servers, switches, bridges, or computers.

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

[0382] Although the embodiments of the present application are described primarily in terms of networks deployed based on IEEE 802.11, those skilled in the art will readily appreciate that various aspects of the present application can be extended to other networks using different standards or protocols, such as Bluetooth, high performance radio LAN (HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard and used primarily in Europe), wide area networks (WANs), wireless local area networks (WLANs), personal area networks (PANs), or other networks now known or later developed. Thus, various aspects provided herein 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 numerals used herein are merely used for distinction purposes for ease of description and are not to be construed as limiting the scope of the present application.

[0384] It should be understood that the term "and / or" in this specification describes an association relationship that simply describes associated objects, and indicates that three relationships may exist. For example, A and / or B may represent three cases: only A exists, both A and B exist, and only B exists. Furthermore, the character " / " in this specification generally indicates an "or" relationship between associated objects.

[0385] It should be understood that the sequence numbers of the above processes do not refer to the execution order in the embodiments of the present application. The execution sequence of the processes should be determined according to the functions and internal logic of the processes, and should not be construed as a restriction on the implementation process of the embodiments of the present application.

[0386] Those skilled in the art may recognize that the units and algorithms can be implemented by electronic hardware or a combination of computer software and electronic hardware in combination with the examples described in the embodiments disclosed herein. Whether a function is implemented by hardware or software depends on the specific application and design constraints of the technical solution. Those 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 go beyond the scope of the present application.

[0387] For the purpose of convenience and concise description, the detailed operation processes of the above-mentioned systems, devices and units may be clearly understood by those skilled in the art by referring to the corresponding processes in the above-mentioned method embodiments, and the details will not be described again here.

[0388] In some embodiments provided in the present application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the described device embodiment is merely an example. For example, the division into units is merely a logical functional division, and in actual implementation, there may be other divisions. 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 shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electronic, mechanical, or other forms.

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

[0390] Furthermore, the functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0391] When a function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on this understanding, the technical solution or part of the technical solution of the present application that basically or partially contributes 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 some instructions for instructing a computer device (which may be a personal computer, a server, a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

[0393] The modules of the device in the embodiments of the present application may be combined, divided and deleted based on actual requirements.

[0394] That is, the above embodiments are merely intended to describe the technical solutions of the present application, and do not limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that, without departing from the scope of the technical solutions of the embodiments of the present application, they may modify the technical solutions described in the above embodiments, or make equivalent substitutions to some technical features thereof.

Claims

1. A data transmission device, comprising: a processing unit configured to generate a single-user physical layer protocol data unit (SU PPDU); and a transceiver unit configured to transmit the SU PPDU to a station, wherein a bandwidth for transmitting 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 an 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. Including: a universal signal (U-SIG) overflow field carried by the first (i-1) information bits of the first content channel is the same as a U-SIG overflow field carried by the first (i-1) information bits of the second content channel, and 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. The data transmission device.

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

3. The data transmission device according to claim 1, wherein 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.

4. The data transmission device according to claim 2, wherein the user field of the EHT-SIG field includes an allocation identifier and an AID field used to uniquely identify a station.

5. The data transmission device according to claim 4, wherein 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.

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

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 is as follows: The data transmission device according to claim 7 includes one or more of 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 processing unit configured to generate a multi-user physical layer protocol data unit (MU PPDU), A transceiver unit configured to transmit the MU PPDU to a station, wherein the bandwidth for transmitting the 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, Including, 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 to j-th information bits 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.

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

12. The EHT-SIG field includes the following fields:

11. The data transmission device of claim 10, further comprising one or more of: a number of Very High Throughput Long Training (EHT-LTF) field symbols, a number of spatial streams indication field, a modulation and coding scheme indication field, a coding indication field, and a beamforming indication field.

13. 13. The data transmission equipment of claim 12, wherein the user fields of the EHT-SIG field include an allocation identifier, an AID field used to uniquely identify a station.

14. 14. The data transmission device of claim 13, wherein the MU PPDU includes a Universal Signaling (U-SIG) field, the U-SIG field includes a PPDU format indication field, and the PPDU format indication field occupies more than one information bit.

15. 15. The data transmission device of claim 14, wherein the EHT-SIG field includes a spatial reuse indication field.

16. The data transmission device according to claim 15, wherein the PPDU format indication 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 U-SIG field is:

17. The data transmission device of claim 16, further comprising one or more of 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.

18. 10. The data transmission device according to claim 8, wherein the MU PPDU is a PPDU transmitted based on non-OFDMA.

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