A physical layer protocol data unit, a transmission method and device of a trigger frame

Abstract

The application provides a transmission method and device of a physical layer protocol data unit, relates to the technical field of wireless fidelity (Wi-Fi), and solves the problem that the data transmission reliability of a physical layer protocol data unit (PPDU) with an extremely high throughput rate in multi-user transmission cannot be guaranteed in the operating mode of indoor low power consumption LPI in the prior art. The method comprises the following steps: an access point generates an extremely high throughput rate multi-user physical layer protocol data unit (EHT MU PPDU), the EHT MU PPDU comprises a resource unit allocation subfield, and the resource unit allocation subfield is used for indicating the resource unit allocation of a plurality of stations, wherein the resource unit corresponding to at least one station in the plurality of stations is used for copy transmission; and the EHT MU PPDU is transmitted.

Description

Technical Field

[0001] This application relates to the field of wireless fidelity (Wi-Fi) technology, and in particular to a method and apparatus for transmitting physical layer protocol data units and trigger frames. Background Technology

[0002] In wireless local area network (WLAN) technology, to achieve the technical goal of extremely high throughput, the Institute of Electrical and Electronics Engineers (IEEE) standard 802.11be defines the Extreme High Throughput Multiple User Physical Layer Protocol Data Unit (EHT MU PPDU) and the Extreme High Throughput Trigger-Based Physical Layer Protocol Data Unit (EHT TB PPDU).

[0003] Furthermore, a Low Power Indoor (LPI) operating mode is defined for the 6GHz spectrum, which imposes strict limits on the maximum transmit power and maximum frequency spectral density. Access point (AP) or station (STA) devices cannot exceed the maximum transmit power value, nor can they exceed the maximum transmit power spectral density. However, data transmission is significantly affected by transmit power and signal attenuation, making it difficult to guarantee data transmission reliability under LPI operating mode.

[0004] Currently, to improve data transmission reliability, the 802.11be standard, based on LPI operation mode, can perform duplication and dual-carrier modulation operations on the data subcarriers in the data field of the EHT MU PPDU in single-user transmission scenarios, thereby transmitting the same information on different data subcarriers. The receiving end can then combine and receive the same information transmitted on multiple subcarriers to improve data transmission reliability.

[0005] However, the above technical solutions only implement the replication mode for single-user transmission. For EHT MU PPDU and EHT TB PPDU in multi-user transmission under LPI operation mode, there is still no good solution on how to improve the reliability of data transmission. Summary of the Invention

[0006] This application provides a transmission and apparatus for Physical Layer Protocol Data Units (PPDUs) and trigger frames, which solves the problem of unreliable data transmission of PPDUs with extremely high throughput in multi-user transmission in the prior art.

[0007] To achieve the above objectives, this application adopts the following technical solution: Firstly, a method for transmitting Physical Layer Protocol Data Units (PLT Data Units) is provided, applicable to access points and sites. In the embodiments of this application, only an access point is used as an example. The method includes: generating an Extremely High Throughput Multi-User Physical Layer Protocol Data Unit (EHT MU PPDU), wherein the EHT MU PPDU includes a resource unit allocation subfield for indicating the resource unit allocation status of multiple sites, wherein the resource units corresponding to at least one of the multiple sites are used for duplicate transmission; and sending the EHT MU PPDU.

[0008] The above technical solution enables the AP to add a RU replication transmission mechanism for one or more users among multiple users in LPI operation mode, which improves the data reliability of the receiving end and makes up for the problem of low data reliability caused by transmission power limitation in low power scenarios.

[0009] In one implementation, the common fields in the EHT MU PPDU include at least one resource unit allocation subfield, which is used to indicate multiple resource units that sequentially divide the frequency domain resources corresponding to the PPDU.

[0010] The resource unit allocation subfield of the EHT MU PPDU indicates the frequency domain corresponding to the PPDU in ascending order.

[0011] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0012] The above-described possible implementations, by using the same site identifier in multiple user fields of the EHT MU PPDU to indicate the corresponding multiple RUs for duplicate transmission, are relatively easy to implement for both the transmitting and receiving ends. Furthermore, the resource unit allocation subfield in the EHT MU PPDU accurately reflects the position of the pilot subcarrier, allowing third-party sites to utilize the pilot subcarriers in the corresponding RUs of other sites to estimate center frequency or phase deviations, thereby improving data reception performance.

[0013] In one implementation, at least two resource units are either contiguous or discontinuous.

[0014] In the above possible implementations, the EHT MU PPDU allows multiple RUs that perform duplicate transmissions to be either contiguous or discontinuous. If a site is close to the AP and does not need to enhance its reception performance through RU duplication transmission, then the RUs at that site can use normal transmission without duplication transmission. The EHT MU PPDU of this application can simultaneously allocate RUs that perform duplicate transmissions and RUs that do not perform duplicate transmissions, offering flexible configuration options.

[0015] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0016] The above possible implementations can use the value of the MCS field in the EHT MU PPDU to indicate that at least two resource units adopt dual-carrier modulation, which provides a flexible indication method and improves the performance of data transmission.

[0017] In one implementation, the user field of the EHT MU PPDU includes first information, which indicates that the resource unit corresponding to the user field is used for copy transmission.

[0018] The above possible implementations can improve the flexibility of the copy transmission indication method by adding first information to the EHT MU PPDU to indicate that the resource unit corresponding to the user field is used for copy transmission.

[0019] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0020] In the above possible implementations, the number of replication transmissions of the resource unit used for replication transmission indicated in the EHT MU PPDU can be flexibly configured, improving the reliability and flexibility of data transmission.

[0021] In one implementation, the first information is carried in bit B15 of the user field of the EHT MU PPDU, or the value of the MCS field in the user field of the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0022] The above possible implementations can use the value of the MCS field in the EHT MU PPDU to indicate the corresponding resource unit for replication and transmission, which is flexible and easy to implement.

[0023] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0024] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0025] The above possible implementations can improve the flexibility of the replication transmission count indication method by adding a second piece of information to the EHT MU PPDU to indicate the number of replication transmissions of the resource unit corresponding to the user field.

[0026] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0027] The above possible implementations can use reserved fields in the EHT MU PPDU to indicate the corresponding resource unit for copy transmission, which is flexible and easy to implement.

[0028] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0029] Secondly, a method for transmitting physical layer protocol data units is provided, applied to a target site. The method includes: receiving an EHT MU PPDU, wherein the EHT MU PPDU includes a resource unit allocation subfield for indicating the resource unit allocation status of multiple sites, wherein at least one of the multiple sites has resource units corresponding to it used for copy transmission; determining, based on the EHT MU PPDU, that multiple resource units corresponding to the target site are used for copy transmission; and merging and decoding the information carried on the multiple resource units.

[0030] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0031] In one implementation, at least two resource units are either contiguous or discontinuous.

[0032] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0033] In one implementation, the user field corresponding to the target site in the EHT MU PPDU includes first information, which is used to indicate that the resource unit corresponding to the user field is used for copy transmission.

[0034] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0035] In one implementation, the first information is carried in the B15 bit of the user field corresponding to the target site in the EHT MU PPDU, or the value of the MCS field in the user field corresponding to the target site in the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0036] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0037] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0038] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0039] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0040] Thirdly, a trigger frame transmission method is provided, applicable to access points and stations. In the embodiments of this application, only the access point is used as an example. The method includes: generating a trigger frame, the trigger frame being used to instruct multiple stations to transmit Extremely High Throughput Triggered Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for duplicate transmission; and transmitting the trigger frame.

[0041] In the above technical solution, by instructing at least one station in the trigger frame to send the resource unit corresponding to the EHT TB PPDU for copy transmission, a multi-user copy transmission mode is realized, which improves the receiving performance of the receiving end and the reliability of data transmission.

[0042] In one embodiment, the method further includes: receiving an EHT TB PPDU from a site; and merging and decoding the information carried on at least one resource unit for the copy transmission.

[0043] In one implementation, at least two of the user information fields included in the trigger frame have the same associated identifier or site identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0044] The above-described possible implementations, which instruct the corresponding resource units to be used for copy transmission by using the same association identifier or site identifier in multiple user information fields in the trigger frame, are relatively easy to implement for both the sending and receiving ends.

[0045] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the at least two user information fields is 15, indicating that the at least two resource units adopt dual-carrier modulation.

[0046] The above possible implementations can use the value of the MCS field in the trigger frame to indicate that at least two resource units adopt dual-carrier modulation, which provides a flexible indication method and improves the performance of data transmission.

[0047] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0048] The above possible implementations can improve the flexibility of the copy transmission indication method by adding first information to the trigger frame to indicate that the resource unit corresponding to the user field is used for copy transmission.

[0049] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0050] In the above possible implementations, the resource unit corresponding to the user field in the trigger frame is indicated for copy transmission by bit B25 in the user information field or the value of the MCS field, which improves the flexibility of the copy transmission indication method.

[0051] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0052] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0053] In the above possible implementations, the number of copy transmissions of the resource unit for copy transmission indicated in the trigger frame can be flexibly configured, improving the reliability and flexibility of data transmission.

[0054] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0055] The above-described possible implementations can improve the flexibility of the copy transmission count indication method by adding second information to the trigger frame to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0056] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0057] The above possible implementations indicate the number of copy transmissions by using some or all bits of the Spatial Stream Start Value and / or Spatial Stream Number (NSS) in the trigger frame. The indication method is flexible and easy to implement.

[0058] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0059] The above possible implementations can use the reserved field in the trigger frame to indicate the corresponding resource unit for copy transmission, which is flexible and easy to implement.

[0060] In one implementation, the resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0061] The above possible implementations can indicate the corresponding resource unit for copy transmission by using a specific index of the resource unit allocation field and / or the PS160MHz primary / secondary indication field in the trigger frame. The indication method is flexible and easy to implement.

[0062] Fourthly, a trigger frame transmission method is provided, applied to a target site. The method includes: receiving a trigger frame, the trigger frame being used to instruct multiple sites to send Extremely High Throughput Trigger-Based Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for copy transmission; and determining, based on the trigger frame, the resource unit corresponding to the target site for sending the EHT TB PPDU for copy transmission.

[0063] In one embodiment, the method further includes: sending the EHT TB PPDU to the access point on the resource unit used for copy transmission.

[0064] In one implementation, at least two of the user information fields included in the trigger frame have the same association identifier or site identifier as the site identifier corresponding to the target site, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0065] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the user fields corresponding to the at least two resource units included in the trigger frame is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0066] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0067] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, for indicating that the resource unit corresponding to the user information field is used for copy transmission.

[0068] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0069] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0070] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0071] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0072] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0073] In one embodiment, the resource unit allocation field and the PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0074] Fifthly, a communication device is provided, comprising a processing module and a transceiver module; the processing module is used to generate an Extremely High Throughput Multi-User Physical Layer Protocol Data Unit (EHT MU PPDU), the EHT MU PPDU including a resource unit allocation subfield for indicating the resource unit allocation status of multiple sites, wherein the resource unit corresponding to at least one of the multiple sites is used for copy transmission; and to transmit the EHT MU PPDU.

[0075] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0076] In one implementation, at least two resource units are either contiguous or discontinuous.

[0077] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0078] In one implementation, the user field of the EHT MU PPDU includes first information, which indicates that the resource unit corresponding to the user field is used for copy transmission.

[0079] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0080] In one implementation, the first information is carried in bit B15 of the user field of the EHT MU PPDU, or the value of the MCS field in the user field of the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0081] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0082] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0083] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0084] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0085] A sixth aspect provides a communication device comprising a processing module and a transceiver module; the transceiver module is configured to receive an EHT MU PPDU, the EHT MU PPDU including a resource unit allocation subfield for indicating the resource unit allocation status of multiple sites, wherein at least one of the multiple sites corresponds to a resource unit used for copy transmission; the processing module is configured to determine, based on the EHT MU PPDU, that multiple resource units corresponding to a target site are used for copy transmission, and to merge and decode the information carried on the multiple resource units.

[0086] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0087] In one implementation, at least two resource units are either contiguous or discontinuous.

[0088] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0089] In one implementation, the user field corresponding to the target site in the EHT MU PPDU includes first information, which is used to indicate that the resource unit corresponding to the user field is used for copy transmission.

[0090] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0091] In one implementation, the first information is carried in the B15 bit of the user field corresponding to the target site in the EHT MU PPDU, or the value of the MCS field in the user field corresponding to the target site in the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0092] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0093] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0094] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0095] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0096] In a seventh aspect, a communication apparatus is provided, the apparatus comprising a processing module and a transceiver module, the processing module being configured to generate a trigger frame, the trigger frame being configured to instruct multiple stations to transmit Extremely High Throughput Trigger-Based Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for duplicate transmission; the transceiver module being configured to transmit the trigger frame.

[0097] In one implementation, the transceiver module is further configured to receive an EHT TB PPDU from the site; the processing module is further configured to merge and decode the information carried on at least one resource unit for the copy transmission.

[0098] In one implementation, at least two of the user information fields included in the trigger frame have the same associated identifier or site identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0099] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the at least two user information fields is 15, indicating that the at least two resource units adopt dual-carrier modulation.

[0100] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0101] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0102] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0103] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0104] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0105] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0106] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0107] In one implementation, the resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0108] Eighthly, a communication apparatus is provided, comprising a processing module and a transceiver module, the transceiver module being configured to receive a trigger frame, the trigger frame being configured to instruct multiple stations to transmit Extremely High Throughput Triggered Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for duplicate transmission; the processing module being configured to determine, based on the trigger frame, the resource unit corresponding to the target station for transmitting the EHT TB PPDU for duplicate transmission.

[0109] In one implementation, the transceiver module is further configured to send the EHT TB PPDU to the access point on the resource unit for copy transmission.

[0110] In one implementation, at least two of the user information fields included in the trigger frame have the same association identifier or site identifier as the site identifier corresponding to the target site, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0111] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the user fields corresponding to the at least two resource units included in the trigger frame is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0112] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0113] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, for indicating that the resource unit corresponding to the user information field is used for copy transmission.

[0114] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0115] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0116] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0117] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0118] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0119] In one implementation, the resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0120] A ninth aspect provides a communication device comprising: a processor and a communication interface; the communication interface being configured to communicate with a module outside the communication device, and the processor being configured to execute a computer program or instructions to implement the method as described in any one of the first aspects above, or to implement the method as described in any one of the third aspects above.

[0121] In a tenth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface being configured to communicate with a module outside the communication device, and the processor being configured to execute a computer program or instructions to implement the method as described in any one of the second aspects above, or to implement the method as described in any one of the fourth aspects above.

[0122] Eleventh aspect: A computer-readable storage medium is provided, the computer-readable storage medium comprising computer program instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of the first aspects above, or the communication device to perform the method as described in any one of the third aspects above.

[0123] In a twelfth aspect, a computer-readable storage medium is provided, the computer-readable storage medium comprising a computer program that, when executed on a computer, causes the computer to perform the method as described in any one of the second aspects above, or the computer to perform the method as described in any one of the fourth aspects above.

[0124] In a thirteenth aspect, a computer program product is provided that, when the computer program product is run on a communication device, causes the communication device to perform the method as described in any one of the first or third aspects above.

[0125] Fourteenth aspect: A computer program product is provided that, when the computer program product is run on a communication device, causes the communication device to perform the method as described in any one of the second or fourth aspects above.

[0126] In a fifteenth aspect, a communication system is provided, the communication system comprising the communication apparatus as described in the fifth aspect above, and the communication apparatus as described in the sixth aspect of the claims.

[0127] In a sixteenth aspect, a communication system is provided, the communication system comprising the communication apparatus as described in the seventh aspect above, and the communication apparatus as described in the eighth aspect of the claims.

[0128] It is understood that any of the communication devices, computer-readable storage media, computer program products and communication systems provided above can be implemented by the corresponding methods provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects of the corresponding methods provided above, and will not be repeated here. Attached Figure Description

[0129] Figure 1 A schematic diagram of the frame structure of an EHT MU PPDU provided in an embodiment of this application; Figure 2 A detailed schematic diagram of the frame structure of an EHT MU PPDU provided in this application embodiment; Figure 3 This is a schematic diagram of the frame structure of a trigger frame provided in an embodiment of this application; Figure 4 A schematic diagram of the frame structure of an EHT TB PPDU provided in an embodiment of this application; Figure 5 An architecture diagram of a WLAN communication system provided in this application embodiment; Figure 6 This is a schematic diagram of the composition of a communication device provided in an embodiment of this application; Figure 7A schematic diagram illustrating a method for transmitting physical layer protocol data units according to an embodiment of this application; Figure 8 A schematic diagram of an EHT MU PPDU frame structure for resource unit copy transmission provided in this application embodiment; Figure 9 A schematic diagram of RU replication transmission of an EHT MU PPDU provided in an embodiment of this application; Figure 10 A schematic diagram illustrating another method for transmitting trigger frames provided in an embodiment of this application; Figure 11 A schematic diagram of a frame structure for a trigger frame used for resource unit copy transmission is provided in an embodiment of this application; Figure 12 A schematic diagram of RU replication transmission of an EHT TB PPDU provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application; Figure 14 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0130] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, a and b and c, where a, b, and c can be single or multiple. Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0131] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0132] The embodiments of this application can be applied to wireless local area network (WLAN) scenarios, and can be applied to IEEE 802.11 system standards, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, or their next generation, such as 802.11be or even later. Alternatively, the embodiments of this application can also be applied to wireless local area network systems such as Internet of Things (IoT) networks or Vehicle to X (V2X) networks. Of course, the embodiments of this application can also be applied to other possible communication systems, such as Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, and future 5th generation (5G) communication systems, etc.

[0133] To facilitate understanding, the technical terms involved in the embodiments of this application will be briefly introduced below.

[0134] WLAN standards started with 802.11a / b / g, progressing through 802.11n, 802.11ac, 802.11ax, and now the currently discussed 802.11be. The 802.11ax standard is called High Efficient (HE), and the 802.11be standard is called Extremely High Throughput (EHT). Standards after 802.11be can be represented as EHT+.

[0135] 802.11be defines two formats for EHT physical layer protocol data units (PPDUs): EHT MU PPDU and EHT TB PPDU. EHT MU PPDU supports both single-user (downlink or uplink) and multi-user (downlink) data transmission. EHT TB PPDU is another EHT PPDU format transmitted by one or more STAs based on a trigger frame sent by the AP.

[0136] Please see Figure 1 This illustrates one possible structure of the EHT MU PPDU that 802.11be might employ. The EHT MU PPDU may comprise three parts: a legacy preamble (L-preamble), an extremely high throughput preamble (EHT-preamble), and a physical layer convergence protocol service data unit (PSDU).

[0137] The L-preamble part includes the L-STF, L-LTF, and L-SIG fields; the EHT-preamble part includes the RL-SIG field and the universal SIG (U-SIG), the extremely high throughput signaling (EHT-SIG) field, the extremely high throughput short training field (EHT-STF) field, and the extremely high throughput long training field (EHT-LTF) field; the PSDU part includes fields such as data.

[0138] For details, please refer to Table 1 below for the meaning of each field in the EHT MU PPDU.

[0139] Table 1. Meaning of each field in EHT MU PPDU

[0140] One possible implementation is, such as Figure 2 As shown, the EHT-SIG field contains common fields and user-specific fields. The common fields can be used to carry resource allocation information assigned to the STA, while the user-specific fields can be used to carry user information. Optionally, the PPDU may also include a PE.

[0141] Specifically, the common fields include Resource Unit Allocation subfield-1 (RU Allocation subfield-1), and may also include Resource Unit Allocation subfield-2 when the bandwidth is greater than or equal to 160MHz, as well as a Cyclic Redundancy Code (CRC) for verification and a Tail subfield for cyclic decoding. The Resource Unit Allocation subfield (Resource Unit Allocation subfield-1 and / or Resource Unit Allocation subfield-2) indicates the allocation of the entire PPDU bandwidth into predetermined resource units. In other words, the resource units of the PPDU bandwidth are divided according to predetermined positions and sizes, and the Resource Unit Allocation subfield (Resource Unit Allocation subfield-1 and / or Resource Unit Allocation subfield-2) indicates the allocation of resource units within the PPDU bandwidth.

[0142] Regarding the signaling indication of EHT MU PPDUs, the U-SIG contains PPDU type and compression mode fields. A PPDU type and compression mode value of 1 indicates that the EHT MU PPDU is a single-user transmission, while a value of 0 indicates that the EHT MU PPDU is a multi-user transmission. In a single-user transmission EHT MU PPDU, the EHT-SIG contains only one user field. In a multi-user transmission EHT MU PPDU, the EHT-SIG includes 2 to M user fields, where M can be a positive integer greater than or equal to 2.

[0143] In the EHT MU PPDU for multi-user transmission, corresponding to the allocation order of multiple resource units indicated in the resource unit allocation subfield, the user-specific field includes 2 to M user fields, which are used to indicate which user (i.e., station) the resource unit is allocated to.

[0144] Each user field includes an associated identifier for the target user, indicating the target site (i.e., the target user). Additionally, the user fields also include indication fields such as the Modulation and Coding Scheme (MCS).

[0145] Additionally, the M user fields are typically grouped in pairs, with each pair of user fields followed by a CRC and Tail field. If M is odd, the last group contains one user field; conversely, if M is even, the last group still contains two user fields.

[0146] It should be understood that the EHT-MU-PPDU is merely an example, and other structures may exist during the standard-setting process or technological development process, which are not limited in this application.

[0147] Additionally, an EHT TB PPDU is another type of EHT PPDU format sent by one or more STAs based on a trigger frame sent by the AP. The specific format will be described below and will not be repeated here.

[0148] Trigger Frames: An AP can allocate resource units (RUs) to one or more STAs through trigger frames.

[0149] 802.11be multi-user transmission is based on orthogonal frequency division multiple access (OFDMA) technology. OFDMA divides the transmission bandwidth into a series of mutually orthogonal and non-overlapping subcarrier sets, allowing different subcarrier sets to be allocated to different users for multiple access. These subcarriers are assigned to different combinations, which are called resource units (RUs).

[0150] The following are different RUs or MRUs defined for uplink and downlink: 26-tone RU, 52-tone RU, 52+26-tone MRU, 106-tone RU, 106+26-tone MRU, 242-tone RU, 484-tone RU, 484+242-tone MRU, 996-tone RU, 996+484-tone MRU, 996+484+242-tone MRU, 2 996-tone RU, 2 996+484-tone MRU, 3 996-tone MRU, 3 996+484-tone MRU and 4 996-tone RU et al.

[0151] In trigger-based multi-user uplink transmission, the AP can use trigger frames to indicate the resource units allocated for uplink transmission to one or more STAs. This is also referred to as the AP scheduling resource units for one or more STAs using trigger frames.

[0152] Specifically, the process by which an AP schedules resource units for one or more STAs via a trigger frame may include: Step 1: The AP sends a trigger frame, which contains resource unit allocation information and other parameters for one or more STAs to send EHT TB PPDUs.

[0153] The trigger frame structure can be referenced as follows: Figure 3 As shown, it includes public information fields and user information list fields.

[0154] The public information field includes subfields such as trigger frame type, uplink length, uplink bandwidth, and reservation, which are used to carry public information related to the scheduling of one or more STAs.

[0155] The user information list field includes 1 to M user information fields (referred to as user information fields). These user information fields may contain special user information fields, identified by the AID 2007. User information fields are used to identify the resource unit allocation for multiple sites (users) and other relevant information. In addition to special user information fields, each user information field includes subfields such as association identifier, resource unit allocation, modulation and coding scheme (MCS), spatial stream start value, number of spatial streams (NSS), and reservation.

[0156] Step 2: The STA receives the trigger frame, parses out the user information field that matches the association identifier of the site from the trigger frame, and then sends an EHT TBPPDU on the resource unit indicated by the resource unit allocation subfield in the user information field.

[0157] For example, the frame structure of an EHT TB PPDU can be as follows: Figure 4 As shown, it includes traditional end training sequence L-STF, traditional long training sequence L-LTF, traditional signaling field L-SIG, repeated traditional signaling field RL-SIG, general signaling field U-SIG, ultra-high throughput short training field EHT-STF, ultra-high throughput long training field EHT-LTF, and data. Optionally, it also includes data grouping extension PE.

[0158] The EHT TB PPDU does not contain EHT-SIG. This is because the STA's scheduling information is sent to the STA by the AP, and the STA does not need to include it in the EHT TB PPDU.

[0159] Step 3: Optionally, the AP receives the EHT TB PPDU sent by the STA and sends an acknowledgment frame to the STA.

[0160] The AP successfully parsed the data from the EHT TB PPDU and sent an acknowledgment frame to the STA.

[0161] Next, we will briefly introduce the implementation environment and application scenarios of the embodiments of this application.

[0162] This application provides a WLAN communication system applicable to the embodiments of this application. The WLAN communication system includes at least one wireless access point (AP) and multiple stations (STAs) associated with the AP. It should be noted that the STA involved in the embodiments of this application can also be called a terminal, and the two can be used interchangeably. The method provided in this application does not specifically limit the terminology.

[0163] As an example, please see Figure 5 The diagram shows the architecture of the WLAN communication system provided in this application. Figure 5 The WLAN includes at least one access point (AP), such as AP1 and AP2. Taking AP1 as an example, which is associated with STA1, STA2, and STA3. AP1 can schedule radio resources for its associated STAs and / or unassociated STAs, and transmit data for those STAs on the scheduled radio resources. For example, AP1 can schedule radio resources for STA1, STA2, and STA3, and transmit data, including uplink and / or downlink data, for them on the scheduled radio resources.

[0164] In addition, the embodiments of this application can be applied to communication between AP and STA, such as multicast communication between AP and STA1, STA2 and STA3, and unicast communication between AP and STA4 or STA5; they can also be applied to communication between STA, such as communication between STA4 and STA5.

[0165] In this application, the STA involved in the embodiments can be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example, it can be a user terminal, user equipment, access device, subscriber station, subscriber unit, mobile station, user agent, or user equipment that supports Wi-Fi communication. The user terminal can include various handheld devices, in-vehicle devices, wearable devices, Internet of Things (IoT) devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile station (MS), terminal, terminal equipment, portable communication devices, handheld devices, portable computing devices, entertainment devices, gaming devices or systems, GPS devices, or any other suitable device configured for network communication via wireless media. Furthermore, the STA can support the 802.11be standard. STA can also support various WLAN standards, including 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a, or the next generation of 802.11be.

[0166] The AP (Access Point) described in this application can be a device deployed in a wireless communication network to provide wireless communication functions for its associated STAs (Stations). It is mainly deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. The AP acts as a bridge connecting wired and wireless networks, its main function being to connect various wireless network clients together and then connect the wireless network to the Ethernet. Specifically, the AP can be a base station, router, gateway, repeater, communication server, switch, or bridge, etc., with a Wi-Fi chip. The base station can include various forms of macro base stations, micro base stations, repeater stations, etc. Furthermore, the AP can support the 802.11be standard. The AP can also support WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a, or next-generation standards like 802.11be; this application does not limit this.

[0167] In some embodiments, the AP and STA involved in this application can be collectively referred to as WLAN devices. In specific implementations, WLAN devices can adopt... Figure 6 The shown composition structure, or including Figure 6 The components shown.

[0168] See Figure 6This is a schematic diagram illustrating the composition of a WLAN device 600 provided in an embodiment of this application. The WLAN device 600 can be a STA or a chip or chip system (or system-on-a-chip) within a STA; it can also be an AP or a chip or chip system (or system-on-a-chip) within an AP. In this embodiment, the chip system can be composed of chips or can include chips and other discrete devices.

[0169] like Figure 6 As shown, the WLAN device 600 includes a processor 601, a transceiver 602, and a communication line 603. Furthermore, the WLAN device 600 may also include a memory 604. The processor 601, memory 604, and transceiver 602 are connected via the communication line 603.

[0170] The processor 601 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 601 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0171] Transceiver 602 is used to communicate with other devices or other communication networks. These other communication networks can be Ethernet, radio access network (RAN), WLAN, etc. Transceiver 602 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0172] Communication line 603 is used to transmit information between the components included in WLAN device 300.

[0173] Memory 604 is used to store instructions. These instructions can be computer programs.

[0174] The memory 304 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions; it can also be a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions; it can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0175] It should be noted that the memory 604 can exist independently of the processor 601 or can be integrated with the processor 601. The memory 604 can be used to store instructions, program code, or some data, etc. The memory 604 can be located inside or outside the WLAN device 600, without limitation. The processor 601 is used to execute the instructions stored in the memory 604 to implement the methods provided in the following embodiments of this application.

[0176] In one example, processor 601 may include one or more CPUs, for example Figure 6 CPU0 and CPU1 in the CPU.

[0177] As an optional implementation, the WLAN device 600 includes multiple processors, for example, besides Figure 6 In addition to processor 601, it may also include processor 607.

[0178] As an optional implementation, the WLAN device 600 also includes an output device 605 and an input device 606. For example, the input device 606 is a device such as a keyboard, mouse, microphone, or joystick, and the output device 605 is a device such as a display screen or speaker.

[0179] Understandable Figure 6 The structural composition shown does not constitute a limitation on this WLAN device, except... Figure 6 In addition to the components shown, the WLAN device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0180] The technical solutions provided in the embodiments of this application will now be described in conjunction with the accompanying drawings.

[0181] It should be noted that the lengths of the fields involved in this application are merely illustrative examples. This application does not limit the length of each field to the length given in this application, and the length may be longer or shorter than the length given in this application.

[0182] It should be noted that in the following embodiments of this application, the message names between various devices, the names of various parameters, or the names of various information are just examples. In other embodiments, they may be other names, and the method provided in this application does not specifically limit them.

[0183] It is understood that in the embodiments of this application, the access point and / or STA may perform some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the various steps may be performed in different orders as presented in the embodiments of this application, and it is not necessarily necessary to perform all the operations in the embodiments of this application.

[0184] Please see Figure 7 This is a schematic flowchart illustrating the method for instructing the copying and transmission of resource units provided in this application embodiment. The following description applies the method provided in this application embodiment to... Figure 6 The example shown is an illustration. Of course, the embodiments of this application can also be applied to other possible communication scenarios or communication systems.

[0185] This application improves the design of the EHT MU PPDU format for multi-user transmission by redesigning the resource unit in the EHT MU PPDU that indicates at least one station for duplicate transmission, thereby achieving RU duplicate transmission mode and improving the receiving performance and data transmission reliability at the receiving end. Specifically, the technical solution of this application allows for either only one station out of multiple stations to use duplicate transmission, or at least two stations out of multiple stations to use duplicate transmission.

[0186] It should be understood that the copy transmission involved in the embodiments of this application may also be referred to as duplicated transmission.

[0187] Specifically, such as Figure 7 As shown, the method for instructing the copying and transmission of resource units provided in this application includes the following steps.

[0188] 701: The access point generates an EHT MU PPDU, wherein the EHT MU PPDU corresponds to multiple sites, and at least one site's resource unit is used for copy transmission.

[0189] As mentioned above, the resource unit allocation subfield in the EHT MU PPDU is used to indicate the resource unit allocation status of multiple sites, that is, to indicate the multiple resource units that divide the frequency domain resources corresponding to the EHT MU PPDU in sequence. The resource units of the EHT MU PPDU bandwidth are divided according to predetermined positions and sizes.

[0190] In addition, such as Figure 2 As shown, the EHT MU PPDU includes multiple user-specific fields, and the allocation order of the multiple resource units corresponds to the multiple user fields within the user-specific fields. That is, one user field corresponds to one resource unit. Each user field includes a site identifier.

[0191] Embodiments of this application use specific indication information in the EHT MU PPDU to indicate that at least one resource unit corresponding to a site is used for copy transmission.

[0192] In one implementation, the site identifiers in at least two user fields are identical, used to indicate at least two resource units corresponding to the at least two user fields for replication transmission.

[0193] Combination Figure 8 As shown, in the user-specific fields of the EHT MU PPDU, the first user field includes a site identifier of AD1, and the second user field also includes a site identifier of AD1. This indicates that the first and second resource units in the resource unit allocation subfield of the EHT MU PPDU are used for replication transmission on the site with site identifier AD1.

[0194] In this application embodiment, the multiple resource units used for duplicate transmission refer to the transmission of the same data bit across multiple resource units. That is, one data bit is duplicated and transmitted multiple times on the data subcarriers included in multiple resource units.

[0195] In other words, within EHT-SIG, the site identifier (such as association identifier) ​​in the user field of multiple RUs is the same, which is used to indicate that the multiple RUs are assigned to the same STA and that replication transmission is used within the multiple RUs.

[0196] For example, a 20MHz EHT MU PPDU can be assigned as a 52-tone RU, a 52-tone RU, a 26-tone RU, and a 106-tone RU. The first 52-tone RU corresponds to the first user field, the second 52-tone RU corresponds to the second user field, and so on. In an embodiment of this application, the AP can assign both the first and second 52-tone RUs to the same STA. That is, the same station identifier is indicated in the two user fields corresponding to these two 52-tone RUs, indicating that the two RUs are assigned to the same STA. Furthermore, the STA's data or data bits are transmitted using a duplicate transmission method on both 52-tone RUs. In other words, the STA's data or data bits are transmitted once on one 52-tone RU and then again on the other 52-tone RU, or the STA's data or data bits are duplicated twice and transmitted on both 52-tone RUs.

[0197] In addition, the AP can assign the 26-tone RU to the third user field and the 106-tone RU to the fourth user field to two other users respectively, and RU replication transmission can be avoided on these two resource units.

[0198] Furthermore, dual carrier modulation (DCM) technology can be used. DCM involves transmitting a data bit repeatedly on two subcarriers simultaneously, that is, modulating a data bit onto two subcarriers.

[0199] In one implementation, the data bits carried on the resource unit are modulated using dual-carrier modulation.

[0200] In another implementation, the AP can indicate that the data bits carried on the corresponding resource unit are modulated using the value of the MCS field in the user field of the EHT MU PPDU. For example, a value of 15 in the MCS field indicates that the corresponding resource unit is modulated using dual-carrier modulation.

[0201] For the sake of simplicity, the data bits carried on the resource unit in this embodiment are modulated using dual carrier modulation, which is referred to as the resource unit using dual carrier modulation.

[0202] In one specific implementation, when the EHT MU PPDU includes at least two resource units for copy transmission, at least one of the at least two user fields corresponding to the at least two resource units has a value of 15 in the MCS field, which indicates that the at least two resource units use dual-carrier modulation.

[0203] Furthermore, for RU replication transmission, among the multiple user fields corresponding to multiple resource units used for replication transmission, the Spatial Stream Count (NSS) of one user field can be set to 1, the Spatial Stream Count subfield can be indicated as 0, or the NSS can be left unindicated as a reserved field. Other indication information in the multiple user fields corresponding to RU replication transmission, such as MCS, reservation, NSS, beamforming subfield, and coding subfield, can be the same, i.e., the corresponding modulation parameters are the same. Alternatively, other indication information can be indicated only in one of the aforementioned user fields, and the corresponding fields of other user fields can be reserved. This application does not impose specific restrictions on this.

[0204] An exemplary diagram of EHT MU PPDU RU copy transmission is shown below. Figure 9 As shown, the transmission bandwidth of the EHT MU PPDU is 160MHz. The AP can divide the entire bandwidth into 484-subcarrier RU1, 484-subcarrier RU2, 242-subcarrier RU3, 242-subcarrier RU4, and 484-subcarrier RU5. Specifically, the EHT MU PPDU RU indicates that: User 1 uses RU replication transmission on the first two 484-subcarriers RU1 and 484-subcarrier RU2, and employs dual-carrier modulation; User 2 uses replication transmission on 242-subcarrier RU3 and 242-subcarrier RU4, and employs dual-carrier modulation; User 3 performs normal transmission, i.e., non-replicated transmission, on 484-subcarrier RU5.

[0205] Of the 484 subcarriers, 468 are data subcarriers and 16 are pilot subcarriers. The data subcarriers carry data information, while the pilot subcarriers transmit predetermined values ​​to enable the receiver to correct frequency offset and phase noise, etc. Figure 9 As shown, the same data is transmitted on 468 data subcarriers of two 484-tone RUs. Furthermore, the data bits can employ dual-carrier modulation, meaning each of the 234 data bits is modulated onto two subcarriers, occupying all 468 data subcarriers. Thus, on the two 484-tone RU data subcarriers, one data bit is copied twice in the frequency domain, and the dual-carrier modulation repeats this process twice, meaning one data bit is copied and transmitted four times. This allows the receiver to perform combined reception, providing a fourfold data reception gain.

[0206] In one implementation, the at least two resource units used for copy transmission can be contiguous or discontinuous. For example, in the 160MHz band mentioned above, including 484-tone RU (1), 484-tone RU (2), 242-tone RU, 242-tone RU and 484-tone RU (3), the EHT MU PPDU RU can indicate that user 1 uses RU copy transmission on the first 484-tone RU (1) and the last 484-tone RU (3). User 2 performs normal transmission, i.e., non-copy transmission, on the second 484-tone RU (2).

[0207] Furthermore, the EHT-SIG of the EHT MU PPDU is transmitted in 20MHz units in the frequency domain, meaning that L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG in the EHT MU PPDU are transmitted in 20MHz units. For example, L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG can be transmitted four times over the entire 80MHz band, providing a 4x (6dB) data reception gain; EHT-SIG can be transmitted eight times over the entire 160MHz band, providing an 8x data reception gain.

[0208] Based on this, the content transmitted within a specific 20MHz range in the EHT-SIG can be represented by a Content Channel (CC). When the bandwidth of the EHT MU PPDU is 20MHz, the EHT-SIG has one CC. When the bandwidth of the EHT MU PPDU is 40MHz, the EHT-SIG has two CCs, designated CC1 and CC2 in ascending order of frequency. The signaling fields in the two content channels have the same format, but the content can differ. When the bandwidth of the EHT MU PPDU is 80MHz, there are still two CCs, for a total of four channels. Therefore, the resource unit allocation information is indicated on the four channels in ascending order of frequency using the structure CC1, CC2, CC1, CC2. When the bandwidth of the EHT MU PPDU is 160MHz or higher, there are two content channels within each 80MHz range. The content of the EHT-SIG can differ within different 80MHz ranges.

[0209] Therefore, for multiple RUs using RU replication transmission, the replication transmission can be represented by each RU using replication transmission. For example, two 52-tone RUs replicate the data bits of a certain STA, and the data bits of that STA are replicated twice. Alternatively, it can be described by a combined large RU that can cover the replication transmission. In this case, the combined large RU corresponds to only one user field. For example, 106-tone RU replication transmission indicates that two 52-tone RUs are replicated, meaning that the data bits of the STA corresponding to the 106-tone RU are replicated twice on the two 52-tone RUs. For example, if the AP indicates that a 52-tone RU is replicated four times, it can indicate that four 52-tone RUs are replicated, and the data bits carried on the 52-tone RU are copied to the four 52-tone RUs for transmission four times. Alternatively, it can indicate that a combined large RU, such as a 242-tone RU, is used for replication transmission, and the data bits carried on the 52-tone RU are replicated four times to the 242-tone RU for transmission. The specific instructions will be described below and will not be repeated here.

[0210] For example, the RU replication factor is equal to the number of times the site identifier in the user field is repeated within CC1 and CC2 within a certain 80MHz range. It should be noted that CC2 only exists when the PPDU bandwidth is greater than 20MHz.

[0211] In addition, in the replication transmission method, different RUs can use one or more of the following methods to increase diversity, improve the reliability of data transmission, and reduce the peak to average power ratio (PAPR).

[0212] 702: Access point sends EHT MU PPDU.

[0213] 703: Target site receives EHT MU PPDU.

[0214] 704: The target site determines multiple resource units corresponding to the target site for replication transmission based on the EHT MU PPDU, and merges and decodes the information carried on the multiple resource units.

[0215] The target site can determine that multiple resource units corresponding to the target site are used for copy transmission based on the copy transmission indication in the EHT MU PPDU, and then merge and decode the information carried on multiple resource units, that is, merge the subcarriers carrying the same data bits on different subcarriers to improve the reliability of received data.

[0216] Based on the implementation method in step 701 above, the target station can determine multiple resource units corresponding to the target station for copy transmission based on the number of station identifiers of the target station included in the user field of the EHT MU PPDU, thereby merging and decoding the data carried on the multiple resource units corresponding to the multiple user fields.

[0217] Through the above-described embodiments of this application, the AP can add a RU replication transmission mechanism for one or more users among multiple users in the OFDMA transmission scenario, thereby improving the data reliability of the receiving end and making up for the problem of low data reliability caused by transmission power limitation in low-power scenarios.

[0218] Furthermore, indicating multiple RUs for duplicate transmission by using the same user fields in the EHT MU PPDU is relatively easy to implement for both the transmitting and receiving ends. In addition, the resource unit allocation subfield in the EHT MU PPDU accurately reflects the position of the pilot subcarrier, allowing third-party sites to utilize the pilot subcarriers in the corresponding RUs of other sites to estimate center frequency or phase deviation, thereby improving data reception performance. The technical solution of this application also allows multiple duplicate transmission RUs to be continuous or discontinuous. Furthermore, if a site is close to the AP and does not need to enhance its reception performance through RU duplicate transmission, then the RUs at that site can use normal transmission without duplicate transmission. The EHT MU PPDU of this application can simultaneously allocate RUs for duplicate transmission and RUs for non-duplicated transmission, offering flexible configuration options.

[0219] In addition, regarding the aforementioned step 701, where the access point indicates in the EHT MU PPDU that at least one resource unit corresponding to a site is used for copy transmission, this application also provides other indication methods besides indicating RU copy transmission through the same site identifier in the user field.

[0220] In one implementation, the user field of the EHT MU PPDU includes first information, which indicates that the resource unit corresponding to the user field is used for copy transmission.

[0221] Specifically, for RU replication transmission, the AP can indicate the RU or MRU in the resource unit allocation subfield of the EHT MU PPDU, namely RUallocation subfield-1 and / or RU allocation subfield-2; at the same time, it provides an indication in the user field corresponding to the resource unit to indicate whether the transmission mode of the resource unit is to use the RU / MRU for normal transmission or to use multiple RUs for replication transmission.

[0222] At this point, the RU using replication transmission can be designated as a merged RU that includes multiple replication RUs, as specified in Table 2 below as a preset rule.

[0223] Table 2. Correspondence between Copy RU and Instruction RU

[0224] The number of replication transmissions for a resource unit can be predetermined, or the AP can negotiate with the STA to determine the number of replication transmissions for the resource unit before sending the EHT MUPPDU, or the number of replication transmissions can be flexibly indicated in the user field.

[0225] For example, if the resource unit allocation subfield indicates 996-tone RUs, and the resource unit's replication transfer count is 2, it means that replication transfer will be performed on 2 484-tone RUs; if the resource unit's replication transfer count is 4, it means that replication transfer will be performed on 4 242-tone RUs; if the resource unit's replication transfer count is 8, it means that replication transfer will be performed on 8 106-tone RUs.

[0226] In a specific implementation, for example, the preset number of copy transmissions is 2. Taking the EHT MU PPDU's instruction to copy and transmit the data or data bits of a certain STA on a 996-tone RU as an example, it can be that one copy of the data or data bits of the STA is transmitted on a 484-tone RU, and the other copy of the data or data bits is transmitted on another 484-tone RU. Alternatively, the data or data bits of the STA can be copied twice and distributed to the data subcarriers of the 996-tone RU for transmission. For example, the odd-numbered subcarriers of the 996-tone RU can transmit one data bit, and the even-numbered subcarriers can transmit one data bit.

[0227] The embodiments described above in this application, by indicating the RU using replicated transmission as a merged RU covering multiple RUs, ensure that each station corresponds to only one user field, saving the signaling overhead of the user field in the EHT MU PPDU and improving system efficiency. Furthermore, the number of replicated transmissions can be accurately indicated in the user field of the EHT MU PPDU according to the protocol, prior negotiation, or other means, so the receiving end does not need to simultaneously read the correct user fields of all station identifiers, resulting in higher data transmission reliability.

[0228] In one implementation, the value of the MCS field in the user field of the EHT MU PPDU can be 14 to indicate that the resource unit is used for replication transmission; other MCS values ​​indicate non-RU replication transmission.

[0229] In one implementation, bit B15 in the user field of the EHT MU PPDU can be used to indicate that the corresponding resource unit is used for replication transmission. That is, the first information can be carried in bit B15 of the user field of the EHT MU PPDU, i.e., the reserved bit.

[0230] In another implementation, the user field in the EHT MU PPDU may also include second information, which indicates the number of times the resource unit corresponding to the user field has been copied and transmitted.

[0231] Specifically, the enhanced MCS can be constructed by combining the 4-bit MCS field of the user field in the EHT MU PPDU with the reserved bit (1 bit). The enhanced MCS value, any one or more values ​​from 16 to 31, indicates RU replication transmission. Different enhanced MCS values ​​can represent different replication counts. For example, an enhanced MCS value of 16 indicates 2 replication transmissions, and an enhanced MCS value of 17 indicates 3 replication transmissions, etc.

[0232] Additionally, for RU replication transfers, the NSS subfield typically has a value of 1, indicating a space stream count of 1. In one implementation, when a resource unit is used for replication transfer, the NSS subfield can be reserved and not indicated; alternatively, the NSS subfield can also be used to indicate the number of replication transfers.

[0233] In one implementation, the first information and / or the second information may also be carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the EHT-SIG.

[0234] It should be noted that the bits mentioned above refer to data bits, that is, the bits before encoding.

[0235] Specifically, the reserved or unused bits or reserved or unused states (entries) of a certain field (sub-field) in the U-SIG and / or EHT-SIG of the EHT MU PPDU are divided into two types: Disregard bits and Validate bits.

[0236] The 802.11be standard specifies that if a station implementing basic EHT features finds that the confirmation bit in a PPDU is not set to the default (or default) value specified in the standard, or that certain subfields are set to the confirmation state, the station must wait until the PPDU ends, pass relevant version-independent information to the Medium Access Control (MAC) layer to ensure coexistence, and terminate the reception of the PPDU. Conversely, for ignore bits or subfields set to ignore, if an EHT station does not find that the confirmation bit in a PPDU is not set to the default (or default) value specified in the standard, or that certain subfields are set to the confirmation state, the station will ignore the ignore bits or a subfield set to ignore and continue reading other fields.

[0237] For example, the first symbol of the U-SIG field includes 5 ignore bits and 3 confirmation bits, while the U-SIG overflow portion of the EHT-SIG field includes 4 ignore bits. If any one of the confirmation bits is given a new function in a subsequent standard and its value is set to a non-default value of 0, the current device (older devices already on the market) will wait for the PPDU to end (defer for the duration of the PPDU), pass the relevant version-independent information to the MAC (Medium Access Control) layer to ensure coexistence, and terminate the reception of the PPDU. Conversely, if any ignore bit is given a new function in a subsequent standard, regardless of its value, if the PPDU does not contain a non-default confirmation bit or confirmation status, the current device will ignore that bit or subfield and continue receiving other fields.

[0238] The corresponding bits are shown in Table 3 below.

[0239] Table 3 Ignore and Confirm Bits in U-SIG and EHT-SIG of EHT MU PPDU

[0240] Specifically, the number of copy transmissions can be indicated by at least one bit in Table 3 above, where a count of 1 indicates that copy transmission was not used. Alternatively, one bit in Table 3 above can indicate that RU copy transmission was used, and at least one bit can indicate the number of copy transmissions.

[0241] It should be noted that by indicating the number of replication transmissions in an EHT MU PPDU, it means that all stations using replication transmissions in the EHT MU PPDU have the same number of replication transmissions, and the EHT MU PPDU may also include resource units that do not use replication transmissions. Alternatively, it can indicate the same number of RU replication transmissions for all stations.

[0242] Through the above implementation method, flexible indication of RU replication transmission can be made in the common field of EHT MU PPDU without making any changes to user-specific fields. This can effectively improve the reliability of multi-user PPDU transmission data, and the indication method is flexible and easy to implement.

[0243] In another implementation, a specific index of the resource unit allocation subfield in the EHT MU PPDU can be used to indicate that the resource unit is used for replication transfer.

[0244] Specifically, RU allocation subfield-1 and RU allocation subfield-2 indicate various RU combinations through a 9-bit index. The combination of different RU replication transfers can be indicated by the index of the resource unit allocation subfield being part or all of 304~511 (converted to decimal).

[0245] For example, when the index of the resource unit allocation subfield is 305, it can indicate that the EHT MU PPDU contains 4 26-tone RU replication transmission, i.e., 26-tone RU replication transmission 4 times; plus an empty 26-tone RU, and another 4 26-tone RU replication transfer. When the index of the resource unit allocation subfield is 312, it can indicate 4. 242-tone RU copy transmission, that is, 242-tone RU copy transmission 4 times.

[0246] It should be noted that in the 9-bit index B8-B0, the high-low bits B2-B0 indicate 0~7, representing 1~8 user fields in the corresponding EHT-SIG content channel. Therefore, when selecting an index, the selected index's B2-B0 bits must correspond to the number of user fields in the corresponding content channel. For example, if B2~B0 of 305 is 1, it corresponds to 2 user fields, which corresponds to the RU combination having two RUs used for replication transmission, each corresponding to 1 user field. If B2~B0 of 312 is 0, it corresponds to 1 user field, which corresponds to the RU combination including 1 RU used for replication transmission, corresponding to 1 user field.

[0247] Table 4. Specific indexes of the resource unit allocation subfield indicate RU replication transfers.

[0248] Through the above implementation method, a specific index of the resource unit allocation subfield of the EHT MU PPDU can be used for RU replication transmission without modifying the user-specific fields. This can effectively improve the reliability of EHT MU PPDU data transmission, and the indication method is flexible and easy to implement.

[0249] Based on the foregoing introduction of trigger frames and EHT TB PPDUs, this application improves the design of the trigger frame format by instructing at least one station to send the resource unit corresponding to the EHT TB PPDU in the trigger frame for copy transmission, thereby realizing a multi-user copy transmission mode, improving the receiving performance of the receiver and the reliability of data transmission.

[0250] This application also provides a method for transmitting trigger frames, such as... Figure 10 As shown, the steps may include the following.

[0251] 1001: The access point generates a trigger frame, which instructs multiple stations to send an EHT TB PPDU on one or more resource units, wherein at least one resource unit is used for copy transmission.

[0252] Based on the aforementioned frame structure of the trigger frame, combined with Figure 3 It is known that the trigger frame includes a public information field and a user information list field. The user information list field includes multiple user information fields. Each user information field includes an association identifier or site identifier, and a resource unit allocation subfield. The resource unit allocation subfield is used to indicate the resource unit allocated to that site for sending EHT TB PPDUs.

[0253] In one implementation, at least two of the user information fields included in the trigger frame have the same associated identifier or site identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0254] In this application embodiment, the multiple resource units used for duplicate transmission refer to the transmission of the same data bit across multiple resource units. That is, one data bit is duplicated and transmitted multiple times on the data subcarriers included in multiple resource units.

[0255] Furthermore, in one embodiment, the value of the MCS field in at least one of the user information fields for copy transmission can indicate that the data bits carried on the corresponding resource unit are modulated using dual-carrier modulation. For example, a value of 15 in the MCS field indicates that the at least two resource units are modulated using dual-carrier modulation.

[0256] For example, in combination Figure 11 As shown, if the station identifier in both the User Information 2 and User Information 3 fields is ID2, it indicates that the two resource units corresponding to User Information 2 and User Information 3 fields are allocated to the same station for copying and transmitting data or data bits from that station. Furthermore, if the value of the MCS field in either User Information 2 or User Information 3 is 15, it indicates that the two resource units indicated by station ID2 in User Information 2 and User Information 3 fields use dual-carrier modulation.

[0257] 1002: Access point sends trigger frame.

[0258] The access point sends a trigger frame to one or more sites.

[0259] 1003: The target site receives the trigger frame and sends an EHT TB PPDU on the resource unit indicated by the trigger frame for the copy transmission.

[0260] After receiving the trigger frame, the target site determines that the AP has allocated a resource unit for the target site for replication transmission based on the resource unit allocation information indicated by the trigger frame. The target site can then replicate the EHT TB PPDU on the allocated resource unit.

[0261] Based on the RU replication transmission indication method in 1001 above, after the target site receives the trigger frame, it queries whether the association identifier or the site identifier in at least two user information fields in the trigger frame is the identifier of the target site. Then, the resource unit in the at least two user information fields is used for the target site to replicate and transmit EHT TB PPDU.

[0262] Furthermore, when the target site transmits an EHT TB PPDU, if a RU in that EHT TB PPDU adopts RU replication transmission mode, it can use data (or all) subcarriers for replication transmission, employing dual-carrier modulation. Additionally, in replication transmission, different RUs can use one or more methods, such as different interleavers, coding puncturing methods, and subcarrier mapping adjustment orders, to increase diversity, improve data transmission reliability, and reduce PAPR.

[0263] An exemplary schematic diagram of the copy transmission of an EHT TB PPDU is shown below. Figure 12 As shown, the EHT TB PPDU has a transmission bandwidth of 160MHz. The AP can divide the entire bandwidth into 484-subcarrier RU1, 484-subcarrier RU2, 242-subcarrier RU3, 242-subcarrier RU4, and 484-subcarrier RU5. The EHT TB PPDU indicates that: User 1 uses RU replication transmission on the first two 484-subcarriers RU1 and 484-subcarrier RU2, and employs dual-carrier modulation; User 2 uses replication transmission on 242-subcarrier RU3 and 242-subcarrier RU4, and employs dual-carrier modulation; User 3 performs normal transmission, i.e., non-replicated transmission, on 484-subcarrier RU5.

[0264] 1004: The access point receives an EHT TB PPDU from the target site and merges and decodes the information carried on at least one resource unit used for copy transmission.

[0265] After receiving the EHT TB PPDU from the target site, the access point can merge and decode the information carried on the resource unit used for replication transmission in the EHT TB PPDU, thereby improving the reliability of the data received by the access point and enhancing the transmission performance.

[0266] Correspondingly, after the access point receives the EHT TB PPDU, if a certain RU in the EHT TB PPDU adopts the RU replication transmission mode, the access point can combine and decode the subcarriers carrying the same data bits on the subcarriers included in different RUs to improve the reliability of the received data. Accordingly, one or more of the following operations can be used on different RUs: different deinterleavers, decoding puncturing methods, and different subcarrier demapping orders.

[0267] In addition, regarding step 1001 above, in which the trigger frame indicates that at least one resource unit corresponding to a station is used for copy transmission, this application also provides other indication methods besides indicating RU copy transmission through the same station or associated identifier in the user information field.

[0268] In one implementation, the value of the MCS field in the user information field of the trigger frame can be used to indicate that the corresponding resource unit is used for copy transmission. For example, a value of 14 in the MCS field indicates that the resource unit corresponding to the user information field is used for copy transmission, while other values ​​in the MCS field indicate non-RU copy transmission.

[0269] Specifically, an indication can be provided in the user information field to indicate whether the transmission mode of the resource unit is normal transmission using the RU / MRU or replication transmission using multiple RUs. In this case, referring to Table 2 above, the RU using replication transmission can be indicated as a merged RU that includes multiple replication RUs.

[0270] In one embodiment, the user information field included in the trigger frame may include first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0271] Specifically, bit B25 in the user information field of the trigger frame can be used to indicate that the corresponding resource unit is for copy transmission. That is, as... Figure 11 As shown, the first information can be carried in bit B25 of the user information field in the trigger frame, i.e., the reserved bit.

[0272] Alternatively, the MCS field (4 bits) of the user field can be combined with the reserved bit (1 bit) to form the enhanced MCS. The enhanced MCS value, any one or more values ​​from 16 to 31, indicates RU replication transmission. Different enhanced MCS values ​​can represent different numbers of replications. For example, an enhanced MCS value of 16 indicates 2 replications, and an enhanced MCS value of 17 indicates 3 replications, etc.

[0273] The number of replication transmissions of a resource unit can be predetermined, or the AP can negotiate with the STA to determine the number of replication transmissions of the resource unit before the AP sends the trigger frame, or the number of replication transmissions can be flexibly indicated in the user information field.

[0274] The embodiments described above in this application, by indicating the RU using replicated transmission as a merged RU covering multiple replicated RUs, ensure that each station corresponds to only one user field, saving signaling overhead in the user information field of the trigger frame and improving system efficiency. Furthermore, the number of replicated transmissions can be accurately indicated in the user field of the trigger frame according to the protocol, prior negotiation, or other means, so the receiving end does not need to simultaneously read the user information fields of all station identifiers correctly, resulting in higher data transmission reliability.

[0275] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of times the resource unit corresponding to the user information field is copied and transmitted.

[0276] Specifically, the second information may be carried in the spatial stream start value in the user information field, or the second information may be carried in part or all of the bits of the spatial stream number NSS in the user information field, or the second information may be carried in the spatial stream start value in the user information field combined with part or all of the bits of the NSS.

[0277] Additionally, the first and / or second information may also be carried in reserved bits in the trigger frame, for example, indicated by one or more of the following bits: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0278] Among them, combined Figure 11 As shown, B25 to B36 are the ignore and confirm bits in the special user information list field, B37-B39 are the reserved bits in the reserved field of the special user information list field; B56-B62 are the last 7 bits of the uplink HE-SIG-A2 reserved field in the public information field, and B63 is the reserved bit in the reserved field of the public information field.

[0279] Specifically, the number of copy transmissions can be indicated by at least one bit, where a value of 1 indicates that no copy transmission was used. Alternatively, one bit can indicate that RU copy transmission was used, and at least one bit can indicate the number of copy transmissions.

[0280] In another embodiment, the resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0281] In other words, specific resource units can be indicated for replication transmission by using the index corresponding to the resource unit allocation subfield of the user information field in the trigger frame, or the index corresponding to the PS160MHz primary / secondary indication field, or by combining the resource unit allocation subfield with the PS160MHz primary / secondary indication field, and by using the reserved entries in the resource unit allocation table index.

[0282] Through the above implementation methods, flexible indication of RU copy transmission can be made in the public information field of the trigger frame, or in the user information field of the trigger frame. This can effectively improve the reliability of multi-user EHT T PPDU transmission data, and the indication method is flexible and easy to implement.

[0283] Since the allocation of resource units (RUs) in the trigger frame is indicated in the user information field, indicating RU replication transmission in the common information field of the trigger frame allows for indication of RU replication transmission for multiple sites, meaning that the number of replication transmissions for all sites using replication transmission is the same. Indicating RU replication transmission in the user information field of the trigger frame allows for individual replication transmission indication for each site, including indications of whether replication transmission is required and the number of replication transmissions.

[0284] It is understood that the same step or a step or message with the same function in the embodiments of this application can be referenced and learned from each other in different embodiments.

[0285] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0286] It is understood that, in the above embodiments, the methods and / or steps implemented by the access point can also be implemented by components (e.g., chips or circuits) that can be used by the access point; and the methods and / or steps implemented by the target site can also be implemented by components (e.g., chips or circuits) that can be used by the target site.

[0287] The above mainly describes the solution provided in this application from the perspective of interaction between various devices. Accordingly, this application also provides a communication device for implementing the various methods described above. This communication device can be an access point in the above method embodiments, or a device containing the access point, or a component usable as an access point; alternatively, this communication device can be a target site in the above method embodiments, or a device containing the target site, or a component usable as a target site.

[0288] It is understood that, in order to achieve the aforementioned functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0289] This application embodiment can divide the communication device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0290] In one implementation scenario, taking a communication device as the access point in the above method embodiment as an example. Figure 13 A schematic diagram of a communication device 1300 is shown. The access point 13 includes a processing module 1301 and a transceiver module 1302.

[0291] The processing module 1301 is used to generate an Extremely High Throughput Multi-User Physical Layer Protocol Data Unit (EHT MUPPDU). The EHT MUPPDU includes a resource unit allocation subfield, which is used to indicate the resource unit allocation status of multiple sites. Among the multiple sites, the resource units corresponding to at least one site are used for replication transmission. The transceiver module 1302 is used to send EHT MU PPDU.

[0292] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0293] In one implementation, at least two resource units are either contiguous or discontinuous.

[0294] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0295] In one implementation, the user field of the EHT MU PPDU includes first information, which indicates that the resource unit corresponding to the user field is used for copy transmission.

[0296] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0297] In one implementation, the first information is carried in bit B15 of the user field of the EHT MU PPDU, or the value of the MCS field in the user field of the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0298] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0299] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0300] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0301] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0302] All relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0303] In this application, the access point is presented in an integrated manner, divided into various functional modules. Here, "module" may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions.

[0304] In some embodiments, those skilled in the art will recognize that the access point can be implemented in hardware using... Figure 6 The communication device 600 shown is in the form of this device.

[0305] As an example, Figure 13 The function / implementation process of the processing module 1301 can be achieved through... Figure 6 The processor 601 in the communication device 600 shown calls computer execution instructions stored in the memory 604 to implement the communication. Figure 13 The function / implementation process of the transceiver module 1302 can be obtained through Figure 6This is achieved through the transceiver 602 in the communication device 600 shown.

[0306] In some embodiments, when Figure 13 When the communication device 1300 is a chip or chip system, the function / implementation process of the processing module 1301 can be implemented through the input / output interface (or communication interface) of the chip or chip system, and the function / implementation process of the transceiver module 1302 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0307] Since the access point provided in this embodiment can execute the above-described service transmission method, the technical effects it can achieve can be referred to the above-described method embodiments, and will not be repeated here.

[0308] In one implementation scenario, such as Figure 13 As shown, taking the communication device 1300 as an example of the target site in the above method embodiment, the communication device 1300 includes a processing module 1301 and a transceiver module 1302.

[0309] The transceiver module 1302 is used to receive EHT MU PPDU, which includes a resource unit allocation subfield to indicate the resource unit allocation status of multiple stations, wherein the resource unit corresponding to at least one of the multiple stations is used for copy transmission.

[0310] The processing module 1301 is used to determine multiple resource units corresponding to the target site for copy transmission based on the EHT MU PPDU, and to merge and decode the information carried on the multiple resource units.

[0311] In one implementation, the EHT MU PPDU includes multiple user fields among its user-specific fields. Each user field includes a site identifier and corresponds to a resource unit. At least two user fields have the same site identifier, which indicates that at least two resource units corresponding to the at least two user fields are used for copy transmission.

[0312] In one implementation, at least two resource units are either contiguous or discontinuous.

[0313] In one implementation, the coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units included in the EHT MU PPDU is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0314] In one implementation, the user field corresponding to the target site in the EHT MU PPDU includes first information, which is used to indicate that the resource unit corresponding to the user field is used for copy transmission.

[0315] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance with the site before the EHT MU PPDU is sent.

[0316] In one implementation, the first information is carried in the B15 bit of the user field corresponding to the target site in the EHT MU PPDU, or the value of the MCS field in the user field corresponding to the target site in the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

[0317] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0318] In one implementation, the user field in the EHT MU PPDU further includes second information, which indicates the number of copy transmissions of the resource unit corresponding to the user field.

[0319] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the EHT MU PPDU: bits B20 to B25 of the first symbol in the general signaling field U-SIG, or bits B2 or B8 of the second symbol in the U-SIG, or bits B13 to B16 of the first symbol in the ultra-high throughput signaling field EHT-SIG.

[0320] In one implementation, the resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

[0321] In another implementation scenario, such as Figure 13 As shown, taking the communication device 1300 as an example of the access point in the above method embodiment, the communication device 1300 includes a processing module 1301 and a transceiver module 1302.

[0322] The processing module 1301 is used to generate a trigger frame, which is used to instruct multiple stations to send Extremely High Throughput Trigger-Based Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for copy transmission.

[0323] The transceiver module 1302 is used to send the trigger frame.

[0324] In one embodiment, the transceiver module 1302 is further configured to receive an EHT TB PPDU from the site; the processing module 1301 is further configured to merge and decode the information carried on at least one resource unit for the copy transmission.

[0325] In one implementation, at least two of the user information fields included in the trigger frame have the same associated identifier or site identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0326] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the at least two user information fields is 15, indicating that the at least two resource units adopt dual-carrier modulation.

[0327] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0328] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0329] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0330] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0331] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0332] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0333] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0334] In one implementation, the resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0335] In one implementation scenario, such as Figure 13 As shown, taking the communication device 1300 as an example of the target site in the above method embodiment, the communication device 1300 includes a processing module 1301 and a transceiver module 1302.

[0336] The transceiver module 1302 is used to receive a trigger frame, which is used to instruct multiple stations to send Extremely High Throughput Trigger-Based Physical Layer Protocol Data Unit (EHT TB PPDU) on one or more resource units, wherein at least one resource unit is used for copy transmission. The processing module 1301 is used to determine the resource unit corresponding to the target site for sending EHT TB PPDU for copy transmission based on the trigger frame.

[0337] In one embodiment, the transceiver module 1302 is further configured to send the EHT TB PPDU to the access point on the resource unit for copy transmission.

[0338] In one implementation, at least two of the user information fields included in the trigger frame have the same association identifier or site identifier as the site identifier corresponding to the target site, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for copy transmission.

[0339] In one implementation, the value of the encoding and modulation strategy (MCS) field of at least one of the user fields corresponding to the at least two resource units included in the trigger frame is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

[0340] In one implementation, the user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

[0341] In one implementation, the first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, for indicating that the resource unit corresponding to the user information field is used for copy transmission.

[0342] In one implementation, different MCS values ​​are used to indicate different replication counts of the resource unit used for replication transmission.

[0343] In one implementation, the number of times the resource unit is copied and transmitted is predetermined, or is determined in advance through negotiation with the site before sending the trigger frame.

[0344] In one implementation, the user information field included in the trigger frame further includes second information, which is used to indicate the number of copy transmissions of the resource unit corresponding to the user information field.

[0345] In one implementation, the second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

[0346] In one implementation, the first information and / or the second information is carried in one or more of the following bits in the trigger frame: bits B25 to B39 in the special user information list field, or bits B56 to B63 in the public information field.

[0347] In one implementation, the resource unit allocation field and / or PS160MHz primary / secondary indicator field in the user information field of the trigger frame are used to indicate the relationship with the user. All relevant content of each step involved in the above method embodiments can be referenced to the functional description of the corresponding functional module, and will not be repeated here.

[0348] In this application, the target site is presented in an integrated manner, divided into various functional modules. Here, "module" may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions.

[0349] The communication device 1300 provided in this application embodiment can be a standalone device or part of a larger device. For example, the communication device 1300 can be: (1) Independent integrated circuit IC, or chip, or chip system or subsystem; (2) A collection of one or more ICs, optionally including a storage component for storing data and instructions; (3) ASIC, such as modem; (4) Modules that can be embedded in other devices; (5) Receivers, smart terminals, wireless devices, handheld devices, mobile units, vehicle-mounted devices, cloud devices, artificial intelligence devices, etc.; (6) Others, etc.

[0350] In some embodiments, those skilled in the art will recognize that the target site can be implemented using the following hardware methods: Figure 6 The communication device 600 shown is in the form of this device.

[0351] Since the target site provided in this embodiment can execute the above method, the technical effects it can achieve can be referred to the above method embodiment, and will not be repeated here.

[0352] As a possible product form, the access point and target site described in the embodiments of this application can also be implemented using the following: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0353] In some embodiments, this application also provides a communication device, which includes a processor for implementing the methods in any of the above method embodiments.

[0354] As one possible implementation, the communication device also includes a memory. This memory stores necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the methods in any of the above method embodiments. Of course, the memory may also be absent from the communication device.

[0355] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, used to receive computer execution instructions (which are stored in memory and may be read directly from memory or may be transmitted through other devices) and transmit them to the processor.

[0356] As another possible implementation, the communication device also includes a communication interface for communicating with modules outside the communication device.

[0357] It is understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or may include chips and other discrete devices. This application does not specifically limit this.

[0358] In some embodiments, this application also provides a communication device (e.g., the communication device may be a chip or a chip system), the communication device including an interface circuit and a logic circuit, the interface circuit being used to acquire input information and / or output information; the logic circuit being used to execute the method in any of the above method embodiments, processing the input information and / or generating output information.

[0359] As a possible product form, the access point and target site described in the embodiments of this application can be implemented by a general bus architecture.

[0360] For clarity, see [link to documentation]. Figure 14 , Figure 14 This is a schematic diagram of the structure of a communication device 1400 provided in an embodiment of this application. The communication device 1400 includes a processor 1401 and a transceiver 1402. The communication device 1400 can be an access point or a target site, or a chip therein. Figure 14 Only the main components of the communication device 1400 are shown. In addition to the processor 1401 and transceiver 1402, the communication device may further include a memory 1403 and input / output devices (not shown).

[0361] The processor 1401 is primarily used to process communication protocols and data, control the entire communication device, execute software programs, and process the data within those programs. The memory 1403 is primarily used to store software programs and data. The transceiver 1402 may include radio frequency (RF) circuitry and an antenna. The RF circuitry is primarily used for converting baseband signals to RF signals and processing RF signals. The antenna is primarily used for transmitting and receiving RF signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0362] The processor 1401, transceiver 1402, and memory 1403 can be connected via a communication bus.

[0363] When the communication device is powered on, the processor 1401 can read the software program in the memory 1403, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1401 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit processes the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 1401. The processor 1401 converts the baseband signal into data and processes the data.

[0364] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0365] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0366] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0367] The modules in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0368] It should be understood that, unless otherwise specified, the same or similar parts between the various embodiments in this application can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The above-described embodiments of this application do not constitute a limitation on the scope of protection of this application.

[0369] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0370] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)). In embodiments of this application, the computer may include the aforementioned apparatus.

[0371] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple components. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0372] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A method for transmitting physical layer protocol data units, characterized in that, Applied to an access point, the method includes: A High-Throughput Multi-User Physical Layer Protocol Data Unit (EHT MU PPDU) is generated. The EHT MU PPDU includes a resource unit allocation subfield, used to indicate the resource unit allocation status of multiple sites, wherein at least one of the multiple sites corresponds to a resource unit used for replication transmission. The EHT MU PPDU also includes user-specific fields, each user field including a site identifier and corresponding to a resource unit. At least two user fields contain the same site identifier, indicating that at least two resource units corresponding to the at least two user fields are used for replication transmission. The user fields in the EHT MU PPDU also include second information, which indicates the number of replication transmissions of the resource unit corresponding to the user field. Send the EHT MU PPDU.

2. The method according to claim 1, characterized in that, The at least two resource units may be continuous or discontinuous.

3. The method according to claim 1 or 2, characterized in that, The coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units in the EHT MU PPDU has a value of 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

4. The method according to claim 1, characterized in that, The user field of the EHT MU PPDU includes first information, which is used to indicate that the resource unit corresponding to the user field is used for copy transmission.

5. The method according to claim 4, characterized in that, The number of times the resource unit is copied and transmitted is predetermined, or determined in advance with the site before sending the EHT MU PPDU.

6. The method according to claim 4 or 5, characterized in that, The first information is carried in bit B15 of the user field of the EHT MU PPDU, or the value of the MCS field in the user field of the EHT MU PPDU is 14, or the value of the MCS field is any value from 16 to 31, to indicate that the resource unit is used for copy transmission.

7. The method according to claim 4 or 5, characterized in that, The first information and / or the second information are carried in one or more of the following bits in the EHT MU PPDU: Data bits B20 to B25 of the first symbol in the U-SIG general signaling field. Alternatively, the data bits B2 or B8 of the second symbol in the U-SIG, Alternatively, the data bits B13 to B16 of the first symbol in the EHT-SIG field for extremely high throughput signaling.

8. The method according to claim 1, characterized in that, The resource unit allocation subfield is used to indicate that the resource unit is used for copy transmission.

9. A method for transmitting physical layer protocol data units, characterized in that, Applied to a target site, the method includes: The system receives an EHT MU PPDU, which includes a resource unit allocation subfield to indicate the resource unit allocation status of multiple sites, wherein at least one of the multiple sites corresponds to a resource unit used for replication transmission; the EHT MU PPDU includes user-specific fields comprising multiple user fields, each user field including a site identifier and corresponding to a resource unit, and at least two user fields having the same site identifier, indicating that at least two resource units corresponding to the at least two user fields are used for replication transmission; the user fields in the EHT MU PPDU also include second information, which indicates the number of replication transmissions of the resource unit corresponding to the user field; Based on the EHT MU PPDU, multiple resource units corresponding to the target site are determined for replication and transmission, and the information carried on the multiple resource units is merged and decoded.

10. The method according to claim 9, characterized in that, The coding and modulation strategy (MCS) field of at least one of the at least two user fields corresponding to the at least two resource units in the EHT MU PPDU has a value of 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

11. The method according to claim 9, characterized in that, The user field corresponding to the target site in the EHT MU PPDU includes first information, which is used to indicate that the resource unit corresponding to the user field is used for copy transmission.

12. The method according to claim 11, characterized in that, The first information is carried in the B15 bit of the user field corresponding to the target site in the EHT MU PPDU, or the value of the MCS field in the user field corresponding to the target site in the EHT MU PPDU is 14, which is used to indicate that the resource unit is used for copy transmission.

13. The method according to claim 11 or 12, characterized in that, The first information and / or the second information are carried in one or more of the following bits in the EHT MU PPDU: Bits B20 to B25 of the first symbol in the U-SIG general signaling field, Alternatively, bit B2 or B8 of the second symbol in the U-SIG, Alternatively, bits B13 to B16 in the first symbol of the EHT-SIG field for extremely high throughput signaling.

14. A method for transmitting a trigger frame, characterized in that, Applied to an access point, the method includes: A trigger frame is generated, which instructs multiple stations to send Extremely High Throughput Triggered Physical Layer Protocol Data Units (EHT TB PPDUs) on one or more resource units, wherein at least one resource unit is used for duplicate transmission; in the user information fields included in the trigger frame, at least two user information fields correspond to the same association identifier or station identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for duplicate transmission; the user information fields included in the trigger frame also include second information, which is used to indicate the number of duplicate transmissions of the resource unit corresponding to the user information field; Send the trigger frame.

15. The method according to claim 14, characterized in that, The method further includes: Receive EHT TB PPDU from the site; The information carried on at least one resource unit used for copy transmission is merged and decoded.

16. The method according to claim 15, characterized in that, The user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

17. The method according to claim 16, characterized in that, The first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, and is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

18. A method for transmitting a trigger frame, characterized in that, Applied to a target site, the method includes: A trigger frame is received, which instructs multiple stations to transmit Extremely High Throughput Triggered Physical Layer Protocol Data Units (EHT TB PPDUs) on one or more resource units, wherein at least one resource unit is used for duplicate transmission; in the user information fields included in the trigger frame, at least two user information fields correspond to the same association identifier or station identifier, which is used to indicate that at least two resource units corresponding to the at least two user information fields are used for duplicate transmission; the user information fields included in the trigger frame also include second information, which is used to indicate the number of duplicate transmissions of the resource unit corresponding to the user information field; The resource unit for transmitting EHT TB PPDU corresponding to the target site is determined based on the trigger frame and used for copy transmission.

19. The method according to claim 18, characterized in that, The method further includes: The EHT TB PPDU is sent to the access point on the resource unit used for copy transmission.

20. The method according to claim 18 or 19, characterized in that, The value of the encoding and modulation strategy (MCS) field of at least one of the user fields in the trigger frame that corresponds to the at least two resource units is 15, which is used to indicate that the at least two resource units adopt dual-carrier modulation.

21. The method according to claim 18 or 19, characterized in that, The user information field included in the trigger frame includes first information, which is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

22. The method according to claim 21, characterized in that, The first information is carried in bit B25 of the user information field, or the value of the MCS field in the user information field is 14, or the value of the MCS field is any value from 16 to 31, and is used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

23. The method according to claim 22, characterized in that, The number of times the resource unit is copied and transmitted is predetermined, or determined in advance through negotiation with the site before sending the trigger frame.

24. The method according to claim 18, characterized in that, The second information is carried in part or all of the bits of the spatial stream start value and / or spatial stream number NSS in the user information field.

25. The method according to claim 21, characterized in that, The first information and / or the second information are carried in one or more of the following bits in the trigger frame: Bits B25 to B39 in the Special User Information List field, or bits B56 to B63 in the Public Information field.

26. The method according to claim 18 or 19, characterized in that, The resource unit allocation field and / or PS160MHz primary / secondary indication field in the user information field of the trigger frame are used to indicate that the resource unit corresponding to the user information field is used for copy transmission.

27. A communication device, characterized in that, The communication device includes: a processor and a communication interface; The communication interface is used to communicate with modules outside the communication device, and the processor is used to run computer programs or instructions to implement the method as described in any one of claims 1-8, or to implement the method as described in any one of claims 14-17.

28. A communication device, characterized in that, The communication device includes: a processor and a communication interface; The communication interface is used to communicate with modules outside the communication device, and the processor is used to run computer programs or instructions to implement the method as described in any one of claims 9-13, or to implement the method as described in any one of claims 18-26.

29. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program that, when executed on a computer, causes the computer to perform the method as claimed in any one of claims 1-8 or 14-17, or causes the computer to perform the method as claimed in any one of claims 9-13 or 18-26.

30. A communication system, characterized in that, The communication system includes the communication device as described in claim 27 and the communication device as described in claim 28.

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