WO2023284644A1 - 一种通信方法及通信装置 - Google Patents

一种通信方法及通信装置 Download PDF

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Publication number
WO2023284644A1
WO2023284644A1 PCT/CN2022/104601 CN2022104601W WO2023284644A1 WO 2023284644 A1 WO2023284644 A1 WO 2023284644A1 CN 2022104601 W CN2022104601 W CN 2022104601W WO 2023284644 A1 WO2023284644 A1 WO 2023284644A1
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WIPO (PCT)
Prior art keywords
ppdu
indication information
sta
trigger frame
extra symbol
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PCT/CN2022/104601
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English (en)
French (fr)
Inventor
狐梦实
于健
淦明
刘辰辰
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22841280.5A priority Critical patent/EP4354998A1/en
Publication of WO2023284644A1 publication Critical patent/WO2023284644A1/zh
Priority to US18/409,493 priority patent/US20240163042A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present application relates to the technical field of wireless local area networks (WLAN), and in particular to a communication method and a communication device.
  • WLAN wireless local area networks
  • WLAN communication technology includes 802.11a/b/g, 802.11n, 802.11ac, 802.11ax, and 802.11be (also known as extremely high Throughput rate (extremely high throughput, EHT) standard), etc.
  • 802.11a/b/g 802.11n, 802.11ac, 802.11ax, and 802.11be (also known as extremely high Throughput rate (extremely high throughput, EHT) standard), etc.
  • EHT extremely high Throughput rate
  • each STA is only allowed to be allocated one resource unit (resource unit, RU) in the uplink resource allocation mode before EHT; in the uplink resource allocation mode of EHT, each STA can be assigned Allocate one RU or multiple resource units (multiple RU, MRU).
  • the EHT may also allow the STA to transmit based on RUs or some RUs in the MRU (also called adaptive RUs (adapted/adaptive RUs)).
  • the data bits to be sent by the STA need to be encoded by low density parity check (LDPC) to obtain the encoded data; where, after encoding
  • the data includes at least the data bits and parity bits, and may also puncture the parity bits.
  • the 802.11n regulation can be based on The new transmission symbols carry parity bits that should have been discarded.
  • AP may also allocate uplink resources in the process of , the AP specifies for the STA whether the STA performs transmission based on symbol slices.
  • the AP specifies based on the RU or MRU allocated to the STA.
  • the STA transmits based on the adaptive RU, since the number of bits carried by the PPDU transmitted based on the adaptive RU is different from the number of bits carried by the PPDU transmitted based on the complete RU or MRU, it is easy to cause the STA to transmit based on the specified implementation method. It is not suitable for the transmission of the STA on the adaptive RU, resulting in a decrease in communication efficiency.
  • Embodiments of the present application provide a communication method and a communication device, which are used to improve WLAN communication efficiency.
  • the first aspect of the embodiments of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an AP, or, the method is executed by some components (such as a processor, a chip, or a chip system, etc.) in the AP.
  • the AP sends first indication information, where the first indication information is used to indicate the first RU of the STA; the AP sends second indication information, where the second indication information is used to indicate whether the STA is allowed based on the
  • the PPDU includes LDPC Extra symbol fragmentation: the AP receives the first PPDU, wherein the second RU occupied by the first PPDU is a part of RUs in the first RU, and the first PPDU includes the LDPC extra symbol fragment.
  • the second indication information sent by the AP is used to indicate whether the STA is allowed to send PPDUs based on a part of the allocated first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on the first RUs
  • the PPDU includes LDPC extra symbol fragments. That is to say, when the STA sends a PPDU based on a part of the RUs in the first RU allocated by the first indication information, the PPDU is configured based on the LDPC extra symbol fragmentation, so that the STA is based on the LDPC extra symbol fragmentation on the adaptive RU to transfer.
  • the AP specifies that the STA does not transmit based on symbol slices, the situation that the STA does not adapt to the specification when transmitting on the adaptive RU and the decoding performance decreases on the AP side is avoided, so as to improve WLAN communication efficiency.
  • the second indication information may be expressed as an adaptive RU allowable field, or the second indication information may be expressed as an adaptive RU allowable subfield, or the second indication information may be expressed as an adaptive TB PPDU allowable field, or , the second indication information may be expressed as an adaptive TB PPDU allowable subfield.
  • the PPDU when the second indication information indicates that the STA is allowed to send the PPDU based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragments" may indicate that when the second indication information indicates that the When the STA sends a PPDU based on a part of the RUs in the first RU, and when the PPDU is sent by the STA based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragments; The information indicates that the STA is allowed to send the PPDU based on a part of the first RUs and the PPDU includes LDPC extra symbol fragments; it may also indicate that the second indication information indicates that the STA is allowed to send the PPDU based on a part of the first RUs. The PPDU and the second indication information further indicate that the PPDU includes LDPC extra symbol fragments.
  • the method further includes: first, the AP determines the configuration mode of the first PPDU according to the size of the first PPDU, and the configuration The manner includes configuring the first PPDU based on the presence of LDPC extra symbol fragments; thereafter, the AP parses the PPDU according to the configuration manner.
  • the AP parses the PPDU according to the configuration mode, which may also be referred to as the AP decoding the PPDU according to the configuration mode.
  • the AP after the AP receives the first PPDU from the STA, it can also determine the configuration method of the first PPDU based on the size of the first PPDU to configure the first PPDU based on the presence of LDPC extra symbol fragments. , so that the AP parses the first PPDU based on the configuration mode. It prevents the AP from parsing the first PPDU according to the configuration mode not based on the presence of LDPC extra symbol fragments, improves the success rate of parsing the first PPDU on the AP side, and further improves communication efficiency.
  • the second aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an STA, or, the method is executed by some components (such as a processor, a chip, or a chip system, etc.) in the STA.
  • the STA receives first indication information, where the first indication information is used to indicate the first RU of the STA; the STA receives second indication information, where the second indication information is used to indicate whether the STA is allowed based on When a part of the RUs in the first RU sends a PPDU, and the second indication indicates that the STA is allowed to send the PPDU based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragments; the STA based on the first RU
  • the indication information and the second indication information send a first PPDU, where the second RU occupied by the first PPDU is a part of the first RU, and the first PPDU includes the LDPC extra symbol segment.
  • the second indication information received by the STA is used to indicate whether the STA is allowed to send PPDUs based on a part of the allocated first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on the first RUs
  • the PPDU includes LDPC extra symbol fragments. That is to say, when the STA sends a PPDU based on a part of the RUs in the first RU allocated by the first indication information, the PPDU is configured based on the LDPC extra symbol fragmentation, so that the STA is based on the LDPC extra symbol fragmentation on the adaptive RU to transfer.
  • the AP specifies that the STA does not transmit based on symbol slices, the situation that the STA does not adapt to the specification when transmitting on the adaptive RU and the decoding performance decreases on the AP side is avoided, so as to improve WLAN communication efficiency.
  • the first indication information is carried in a trigger frame, and the trigger frame further includes third indication information, and the third indication information is used to indicate that there is an LDPC extra symbol piece.
  • the first indication information used to indicate to the STA the first RU of the STA is carried in the trigger frame, and the trigger frame also includes the third indication information used to indicate the existence of LDPC extra symbol fragments, so that the The same trigger frame realizes the carrying of multiple indication information, which can save overhead and further improve communication efficiency.
  • the third indication information includes an LDPC Extra Symbol Segment subfield (LDPC Extra Symbol Segment subfield), and when the value of the LDPC Extra Symbol Segment subfield is 1, it indicates that there is an LDPC Extra Symbol Segment.
  • LDPC Extra Symbol Segment subfield when the value of the LDPC Extra Symbol Segment subfield is 1, it indicates that there is an LDPC Extra Symbol Segment.
  • the trigger frame is carried in the second PPDU, and the second indication information is carried in the second PPDU.
  • the trigger frame containing the first indication information and the third indication information is carried in the second PPDU, and is used to indicate whether the STA is allowed to send the second indication information of the PPDU based on a part of the allocated first RUs It is also carried in the second PPDU, so that multiple indication information can be carried through the same PPDU, which can save overhead and further improve communication efficiency.
  • the second indication information is carried in a trigger frame.
  • the second PPDU includes first information different from the trigger frame, and the second indication information is carried in the first information; wherein, the first information may be information in a preamble (preamble), and control Frames, management frames, etc., are not limited here.
  • the third aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an STA, or, the method is executed by some components (such as a processor, a chip, or a chip system, etc.) in the STA.
  • the STA receives a trigger frame, and the trigger frame includes first indication information and third indication information, wherein the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether There is an LDPC extra symbol fragment; the STA determines a second RU based on the trigger frame, where the second RU is a part of the first RU, and the third indication information indicates that there is no LDPC extra symbol fragment,
  • the first PPDU is sent based on the second RU, the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation.
  • the trigger frame received by the STA includes the first indication information used to indicate the first RU of the STA and the third indication information used to indicate whether there is an LDPC extra symbol fragment; the STA determines the first RU based on the trigger frame.
  • the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation. That is to say, when the STA selects an adaptive RU based on the allocated first RU, the STA selects an adaptive RU corresponding to a PPDU that does not require LDPC extra symbol fragmentation, and transmits the first PPDU based on the adaptive RU.
  • the AP specifies that the STA does not transmit based on symbol slices, the STA does not adapt to the specification when transmitting on the adaptive RU, and the decoding performance decreases on the AP side, so that the STA transmits the PPDU based on the adaptive RU. It is adapted to the designation of the AP in real time to improve WLAN communication efficiency.
  • the fourth aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an AP, or, the method is executed by some components in the AP (such as a processor, a chip, or a chip system, etc.).
  • the AP generates a trigger frame, and the trigger frame includes first indication information and third indication information, wherein the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether there is LDPC extra symbol fragmentation; the AP sends the trigger frame.
  • the trigger frame generated and sent by the AP includes the first indication information used to indicate the first RU of the STA and the third indication information used to indicate whether there is an LDPC extra symbol fragment; the STA based on the trigger frame
  • the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation. That is to say, when the STA selects an adaptive RU based on the allocated first RU, the STA selects an adaptive RU corresponding to a PPDU that does not require LDPC extra symbol fragmentation, and transmits the first PPDU based on the adaptive RU.
  • the AP specifies that the STA does not transmit based on symbol slices, the STA does not adapt to the specification when transmitting on the adaptive RU, and the decoding performance decreases on the AP side, so that the STA transmits the PPDU based on the adaptive RU. It is adapted to the designation of the AP in real time to improve WLAN communication efficiency.
  • the fifth aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an STA, or, the method is executed by some components (such as a processor, a chip, or a chip system, etc.) in the STA.
  • the STA receives a trigger frame, and the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA; the STA sends the first RU determined based on the trigger frame.
  • PPDU wherein the first PPDU includes LDPC extra symbol fragments, and the second RU is a part of the first RU.
  • the trigger frame received by the STA includes the first indication information used to indicate the first RU of the STA; when the STA transmits the first PPDU based on the second RU determined by the trigger frame, the first PPDU includes LDPC additional Symbol slice, the second RU is a part of the first RU. That is to say, when the STA selects the second RU as the adaptive RU based on the allocated first RU, the first PPDU transmitted by the STA on the adaptive RU includes LDPC extra symbol fragments.
  • the STA does not adapt to the specification when transmitting on the adaptive RU, resulting in low communication efficiency, so that the PPDU transmitted by the STA based on the adaptive RU includes LDPC additional symbol fragmentation to improve WLAN communication efficiency.
  • the sixth aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by an AP, or, the method is executed by some components in the AP (such as a processor, a chip, or a chip system, etc.).
  • the AP generates a trigger frame, and the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA; the second RU determined by the AP based on the trigger frame receives the first PPDU, wherein the first PPDU includes LDPC extra symbol fragments, and the second RU is a part of the first RU.
  • the trigger frame generated and sent by the AP includes the first indication information used to indicate the first RU of the STA; thereafter, the AP receives the first PPDU based on the second RU determined by the trigger frame, that is, the STA receives the first PPDU based on
  • the first PPDU includes LDPC extra symbol fragments
  • the second RU is a part of the first RU. That is to say, when the STA selects the second RU as the adaptive RU based on the allocated first RU, the first PPDU transmitted by the STA on the adaptive RU includes LDPC extra symbol segments.
  • the STA does not adapt to the specification when transmitting on the adaptive RU, resulting in low communication efficiency, so that the PPDU transmitted by the STA based on the adaptive RU includes LDPC additional symbol fragmentation to improve WLAN communication efficiency.
  • the first PPDU includes fourth indication information, and the fourth indication information is used to indicate whether the first PPDU includes the LDPC extra symbol piece.
  • the AP may also determine whether the configuration of the first PPDU includes the LDPC extra symbol fragment based on the fourth indication information in the first PPDU, so that the AP Subsequently, the first PPDU is parsed based on the fourth indication information, so as to improve the success rate of parsing the first PPDU at the AP side, and further improve communication efficiency.
  • the LDPC extra symbol slice includes post-forward error correction padding (post-forward error correction padding, post-FEC padding) type Extra symbol slices.
  • the symbol slices applied by EHT include different types. Compared with the current EHT which can only be applied to the implementation of additional symbol slices of the pre-FEC padding type, the The LDPC extra symbol slicing is further expanded, so that the post-FEC padding type of extra symbol slicing can be used, further improving communication efficiency.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • the first RU is an RU or an MRU.
  • the first RU indicated by the AP through the first indication information may be an RU or an MRU, so that the solution is adapted to different RU allocation scenarios.
  • the seventh aspect of the embodiment of the present application provides a communication device, including a sending unit and a receiving unit;
  • the sending unit is configured to send first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the sending unit is further configured to send second indication information, where the second indication information is used to indicate whether the STA is allowed to send PPDUs based on a part of the first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on When a part of RUs in the first RU sends the PPDU, the PPDU includes LDPC extra symbol fragmentation;
  • the receiving unit is configured to receive a first PPDU, wherein the second RU occupied by the first PPDU is a part of RUs in the first RU, and the first PPDU includes the LDPC extra symbol segment.
  • the second indication information sent by the sending unit is used to indicate whether the STA is allowed to send PPDUs based on a part of the allocated first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on the first RU
  • the PPDU includes LDPC extra symbol fragments. That is to say, when the STA sends a PPDU based on a part of the RUs in the first RU allocated by the first indication information, the PPDU is configured based on the LDPC extra symbol fragmentation, so that the STA is based on the LDPC extra symbol fragmentation on the adaptive RU to transfer.
  • the AP specifies that the STA does not transmit based on symbol slices, the situation that the STA does not adapt to the specification when transmitting on the adaptive RU and the decoding performance decreases on the AP side is avoided, so as to improve WLAN communication efficiency.
  • the device further includes a processing unit, where the processing unit is specifically configured to:
  • the configuration mode includes configuring the first PPDU based on the existence of LDPC extra symbol fragmentation
  • the PPDU is parsed according to the configuration mode.
  • the eighth aspect of the embodiment of the present application provides a communication device, which is characterized by including a sending unit and a receiving unit;
  • the receiving unit is configured to receive first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the receiving unit is further configured to receive second indication information, where the second indication information is used to indicate whether the STA is allowed to send PPDUs based on a part of the first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on When a part of RUs in the first RU sends the PPDU, the PPDU includes LDPC extra symbol fragmentation;
  • the sending unit is configured to send a first PPDU based on the first indication information and the second indication information, wherein the second RU occupied by the first PPDU is a part of the first RU, and the first PPDU includes The LDPC extra symbol slices.
  • the second indication information received by the receiving unit is used to indicate whether the STA is allowed to send PPDUs based on a part of the allocated first RUs, and the second indication information indicates that the STA is allowed to send PPDUs based on the first RU
  • the PPDU includes LDPC extra symbol fragments. That is to say, when the sending unit sends a PPDU based on a part of the RUs in the first RU allocated by the first indication information, the PPDU is configured based on LDPC extra symbol slicing, so that the STA is configured based on LDPC extra symbol slicing in adaptive RU for transmission.
  • the AP specifies that the STA does not transmit based on symbol slices, the situation that the STA does not adapt to the specification when transmitting on the adaptive RU and the decoding performance decreases on the AP side is avoided, so as to improve WLAN communication efficiency.
  • the first indication information is carried in a trigger frame, and the trigger frame further includes third indication information, and the third indication information is used to indicate that there is an LDPC extra symbol piece.
  • the trigger frame is carried in the second PPDU, and the second indication information is carried in the second PPDU.
  • a ninth aspect of the embodiment of the present application provides a communication device, including a transceiver unit and a processing unit;
  • the transceiver unit is configured to receive a trigger frame, where the trigger frame includes first indication information and third indication information, wherein the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether there is LDPC extra symbol slicing;
  • the processing unit is configured to determine a second RU based on the trigger frame, where the second RU is a part of the first RU, and when the third indication information indicates that there is no LDPC extra symbol fragment, based on the second RU
  • the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation.
  • the trigger frame received by the transceiver unit includes the first indication information used to indicate the first RU of the STA and the third indication information used to indicate whether there is an LDPC extra symbol fragment; thereafter, the processing unit based on the When the trigger frame determines that a part of the first RU transmits the first PPDU, and the third indication information indicates that there is no LDPC extra symbol fragment, the first PPDU is a PPDU that does not need the LDPC extra symbol fragment.
  • the processing unit selects an adaptive RU based on the allocated first RU, the processing unit selects an adaptive RU corresponding to a PPDU that does not require LDPC extra symbol fragmentation, and transmits the first PPDU based on the adaptive RU. Therefore, when the AP specifies that the STA does not transmit based on symbol slices, the STA does not adapt to the specification when transmitting on the adaptive RU, and the decoding performance decreases on the AP side, so that the STA transmits the PPDU based on the adaptive RU. It is adapted to the designation of the AP in real time to improve WLAN communication efficiency.
  • the tenth aspect of the embodiment of the present application provides a communication device, which is characterized by including a transceiver unit and a processing unit;
  • the processing unit is configured to generate a trigger frame, where the trigger frame includes first indication information and third indication information, where the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether there is LDPC extra symbol slicing;
  • the transceiver unit is used to send the trigger frame.
  • the trigger frame generated and sent by the processing unit includes the first indication information used to indicate the first RU of the STA and the third indication information used to indicate whether there is an LDPC extra symbol fragment; thereafter, the STA based on
  • the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation. That is to say, when the STA selects an adaptive RU based on the allocated first RU, the STA selects an adaptive RU corresponding to a PPDU that does not require LDPC extra symbol fragmentation, and transmits the first PPDU based on the adaptive RU.
  • the AP specifies that the STA does not transmit based on symbol slices, the STA does not adapt to the specification when transmitting on the adaptive RU, and the decoding performance decreases on the AP side, so that the STA transmits the PPDU based on the adaptive RU. It is adapted to the designation of the AP in real time to improve WLAN communication efficiency.
  • the eleventh aspect of the embodiment of the present application provides a communication device, including a transceiver unit and a processing unit;
  • the transceiving unit is configured to receive a trigger frame, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the processing unit is configured to send a first PPDU based on the second RU determined based on the trigger frame, where the first PPDU includes an LDPC extra symbol segment, and the second RU is a part of the first RU.
  • the trigger frame received by the transceiver unit includes the first indication information used to indicate the first RU of the STA; thereafter, when the processing unit transmits the first PPDU based on the second RU determined by the trigger frame, the first The PPDU includes LDPC extra symbol slices, and the second RU is a part of the first RU. That is to say, when the STA selects the second RU as the adaptive RU based on the allocated first RU, the first PPDU transmitted by the STA on the adaptive RU includes LDPC extra symbol segments.
  • the STA does not adapt to the specification when transmitting on the adaptive RU, resulting in low communication efficiency, so that the PPDU transmitted by the STA based on the adaptive RU includes LDPC additional symbol fragmentation to improve WLAN communication efficiency.
  • the twelfth aspect of the embodiment of the present application provides a communication device, including a transceiver unit and a processing unit;
  • the processing unit is configured to generate a trigger frame, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the transceiver unit is configured to receive a first PPDU at a second RU determined based on the trigger frame, where the first PPDU includes LDPC extra symbol fragments, and the second RU is a part of the first RU.
  • the trigger frame generated and sent by the processing unit includes the first indication information used to indicate the first RU of the STA; thereafter, the transceiver unit receives the first PPDU based on the second RU determined by the trigger frame, that is, the STA
  • the first PPDU includes LDPC extra symbol fragments
  • the second RU is a part of the first RU. That is to say, when the STA selects the second RU as the adaptive RU based on the allocated first RU, the first PPDU transmitted by the STA on the adaptive RU includes LDPC extra symbol fragments.
  • the STA does not adapt to the specification when transmitting on the adaptive RU, resulting in low communication efficiency, so that the PPDU transmitted by the STA based on the adaptive RU includes LDPC additional symbol fragmentation to improve WLAN communication efficiency.
  • the first PPDU includes fourth indication information, and the fourth indication information is used to indicate whether the first PPDU includes the LDPC extra symbol Fragmentation.
  • the LDPC extra symbol slice includes a post-forward error correction padding type extra symbol slice.
  • the first RU is an RU or an MRU.
  • the communication devices provided in the seventh aspect to the twelfth aspect can also implement the communication method in the aforementioned first aspect to the sixth aspect and any embodiment thereof, and achieve corresponding beneficial effects.
  • the thirteenth aspect of the embodiment of the present application provides a communication device, including at least one processor, and the at least one processor is coupled to a memory;
  • the memory is used to store programs or instructions
  • the at least one processor is used to execute the program or instructions, so that the device implements the method described in the first aspect or any possible implementation manner of the first aspect, or enables the device to implement the second aspect or the first aspect
  • the device implements the sixth aspect or the method described in any possible implementation manner of the sixth aspect.
  • the fourteenth aspect of the embodiments of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes any of the above-mentioned first aspect or first aspect.
  • the processor executes the method described in the above second aspect or any possible implementation manner of the second aspect, or, the processor executes the method described in the above third aspect or The method described in any possible implementation manner of the third aspect, or, the processor executes the method described in the fourth aspect or any possible implementation manner of the fourth aspect, or, the processor executes the method described in the foregoing The method described in the fifth aspect or any possible implementation manner of the fifth aspect, or, the processor executes the method described in the sixth aspect or any possible implementation manner of the sixth aspect.
  • the fifteenth aspect of the embodiment of the present application provides a computer program product (or computer program) storing one or more computers.
  • the processor executes the above-mentioned first aspect or the first aspect.
  • the method in any possible implementation manner, or, the processor executes the method described in the second aspect or any possible implementation manner of the second aspect, or, the processor executes the method described in the third aspect or The method described in any possible implementation manner of the third aspect, or, the processor executes the method described in the fourth aspect or any possible implementation manner of the fourth aspect, or, the processor executes the method described in the foregoing
  • the sixteenth aspect of the embodiment of the present application provides a chip system, the chip system includes at least one processor, configured to support the communication device to implement the functions involved in the first aspect or any possible implementation of the first aspect ; or, used to support the communication device to realize the functions involved in the second aspect or any possible implementation of the second aspect; or, used to support the communication device to realize the third aspect or any possible implementation of the third aspect or, used to support the communication device to implement the functions involved in the fourth aspect or any possible implementation of the fourth aspect; or, used to support the communication device to implement the fifth aspect above Or the function involved in any possible implementation manner of the fifth aspect; or, used to support the communication device to implement the sixth aspect or the function involved in any possible implementation manner of the sixth aspect.
  • the chip system may further include a memory for storing necessary program instructions and data of the communication device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
  • the seventeenth aspect of the embodiment of the present application provides a communication system, the communication system includes the communication device of the seventh aspect and the communication device of the eighth aspect, and/or, the communication system includes the communication device of the ninth aspect and The communication device of the tenth aspect, and/or, the communication system includes the communication device of the eleventh aspect and the communication device of the twelfth aspect, and/or, the communication system includes the communication device of the thirteenth aspect.
  • the technical effect brought by any one of the design methods from the seventh aspect to the seventeenth aspect can refer to the technical effects brought about by the different implementation methods in the first aspect to the sixth aspect above, and will not be repeated here.
  • Fig. 1 a is a schematic diagram of the communication system applied in the present application.
  • Figure 1b is a schematic diagram of the AP used in this application.
  • Fig. 1c is a schematic diagram of the STA applied in this application.
  • Fig. 2a is a schematic diagram of the trigger frame involved in the present application.
  • Fig. 2b is another schematic diagram of the trigger frame involved in the present application.
  • Figure 2c is another schematic diagram of the HE TB PPDU involved in this application.
  • Fig. 2d is another schematic diagram of the trigger frame involved in the present application.
  • FIG. 3a is a schematic diagram of configuring RU based on a trigger frame involved in the present application
  • FIG. 3b is another schematic diagram of configuring RU based on a trigger frame involved in the present application
  • Fig. 4 is a schematic diagram of the LDPC encoding process involved in the present application.
  • Fig. 5 is a schematic diagram of the LDPC symbol fragmentation involved in the present application.
  • FIG. 6 is a schematic diagram of a communication method provided by the present application.
  • FIG. 7 is another schematic diagram of a communication method provided by the present application.
  • FIG. 8 is another schematic diagram of a communication method provided by the present application.
  • FIG. 9 is another schematic diagram of a communication method provided by the present application.
  • FIG. 10 is another schematic diagram of a communication method provided by the present application.
  • FIG. 11 is a schematic diagram of a communication device provided by the present application.
  • FIG. 12 is another schematic diagram of a communication device provided by the present application.
  • At least one item (unit) of a, b, or c may represent: a, b, c; a and b; a and c; b and c; or a and b and c.
  • a, b, c can be single or multiple.
  • words such as “first” and “second” do not limit the number and order of execution, and words such as “first” and “second” do not necessarily limit the difference.
  • words such as “exemplary” or “for example” are used to mean an example, illustration or illustration. Any embodiment or design described in this application as “exemplary”, “for example” or “such as” is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of words such as “exemplary,” “for example,” or “such as” is intended to present related concepts in a specific manner.
  • the value of the field involved in any embodiment of the present application is “0" or the value "1" is only for illustration, and the value can also be interchanged, for example, the value of the field indicated by “0”
  • the information of the field may also indicate the information indicated by the field value "1", or it may also be realized through other field names or other values, which are not limited here.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • system architecture of the method provided in the embodiment of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is for more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided in this application can be applied to various communication systems, for example, systems using the 802.11 standard.
  • the 802.11 standard includes, but is not limited to: the 802.11be standard, or the next-generation 802.11 standard.
  • the applicable scenario of the technical solution of the present application includes communication between an AP and one or more STAs, or communication between APs, or communication between STAs.
  • the term “communication” may also be described as "data transmission", "information transmission” or "transmission”.
  • FIG. 1a is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application.
  • the wireless communication system may include one or more APs (such as AP101 and AP102 in FIG. 1a ), and one or more STAs (such as STA201 , STA202 and STA203 in FIG. 1a ).
  • both the AP and the STA support the WLAN communication protocol, which may include 802.11be (or called Wi-Fi 7, EHT protocol), and may also include 802.11ax, 802.11ac and other protocols.
  • the communication protocol may also include the next-generation protocol of 802.11be, etc., which is not limited here.
  • the device implementing the method of the present application may be an AP or STA in the WLAN, or a processor, chip or processing system installed in the AP or STA.
  • the access point involved in this application is a device with a wireless communication function, supports communication using the WLAN protocol, and has the ability to communicate with other devices (such as stations or other interfaces) in the WLAN network.
  • access point) communication function can also have the function of communicating with other devices.
  • an access point may be called an access point station (AP STA).
  • the device with wireless communication function can be a complete device, or it can be a chip or a processing system installed in the complete device, and the device with these chips or processing systems can be implemented under the control of the chip or processing system.
  • the AP in this embodiment of the present application is a device that provides services for STAs and can support 802.11 series protocols.
  • APs can be communication entities such as communication servers, routers, switches, and bridges; APs can include various forms of macro base stations, micro base stations, relay stations, etc.
  • APs can also be chips and processing devices in these various forms of equipment. system, so as to implement the methods and functions of the embodiments of the present application.
  • the station involved in this application is a device with a wireless communication function, supports communication using the WLAN protocol, and has the ability to communicate with other stations in the WLAN network or access Ability to communicate.
  • a station may be called a non-access point station (non-access point station, non-AP STA).
  • STA is any user communication device that allows users to communicate with AP and then communicate with WLAN.
  • the device with wireless communication function can be a complete device, or a chip or processing system installed in the complete device, etc. Devices equipped with these chips or processing systems can implement the methods and functions of the embodiments of the present application under the control of the chips or processing systems.
  • the STA can be a tablet computer, a desktop computer, a laptop computer, a notebook computer, an ultra-mobile personal computer (Ultra-mobile personal computer, UMPC), a handheld computer, a netbook, a personal digital assistant (personal digital assistant, PDA), a mobile phone, etc.
  • User equipment that can be connected to the Internet, or IoT nodes in the Internet of Things, or vehicle communication devices in the Internet of Vehicles, or entertainment equipment, game equipment or systems, global positioning system equipment, etc., STA can also be the chip and processing system.
  • the WLAN system can provide high-speed and low-latency transmission. With the continuous evolution of WLAN application scenarios, the WLAN system will be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry or the Banking industry, used in corporate offices, stadium pavilions, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, squares, streets, production workshops and warehousing, etc.
  • scenarios or industries such as the Internet of Things industry, the Internet of Vehicles industry or the Banking industry, used in corporate offices, stadium pavilions, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, squares, streets, production workshops and warehousing, etc.
  • devices supporting WLAN communication can be sensor nodes in smart cities (such as smart water meters, smart meters, and smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, etc.) instrument, display screen, TV, stereo, refrigerator, washing machine, etc.), nodes in the Internet of Things, entertainment terminals (such as augmented reality (augmented reality, AR), virtual reality (virtual reality, VR) and other wearable devices), Smart devices in smart office (such as printers, projectors, loudspeakers, audio, etc.), Internet of Vehicles devices in Internet of Vehicles, infrastructure in daily life scenes (such as vending machines, self-service navigation consoles in supermarkets, Self-service cashier equipment, self-service ordering machines, etc.), and equipment for large sports and music venues, etc.
  • the specific forms of the STA and the AP are not limited in the embodiment of the present application, and are only illustrative descriptions here.
  • FIG. 1b is a schematic structural diagram of an access point AP provided by an embodiment of the present application.
  • the AP can be multi-antenna/multi-radio, or single-antenna/single-radio.
  • the antenna or the radio frequency part of the AP may be separated from the main part of the AP to form a remote layout structure.
  • the AP may include a physical layer processing circuit and a media access control processing circuit, the physical layer processing circuit may be used for processing physical layer signals, and the MAC layer processing circuit may be used for processing MAC layer signals.
  • FIG. 1c is a schematic structural diagram of a station STA provided by an embodiment of the present application.
  • Figure 1c shows a schematic diagram of the STA structure of a single antenna/radio frequency.
  • the STA can also have multiple antennas/multi-radio frequencies, and can be a device with more than two antennas.
  • the antenna/radio frequency is used to send/receive data packets. .
  • the antenna or radio frequency part of the STA may be separated from the main part of the STA, and form a remote layout structure.
  • the STA may include a PHY processing circuit and a MAC processing circuit
  • the physical layer processing circuit may be used to process physical layer signals
  • the MAC layer processing circuit may be used to process MAC layer signals.
  • the AP allocates uplink resources to the STA.
  • WLAN has gone through multiple generations so far, such as 802.11a/b/g, 802.11n, 802.11ac, 802.11ax, and 802.11be, which is currently being discussed.
  • the 802.11n standard can be called high throughput (high throughput, HT)
  • the 802.11ac standard can be called very high throughput (very high throughput, VHT)
  • the 802.11ax (Wi-Fi 6) can be called high efficient (high efficient).
  • HE high throughput
  • Wi-Fi 7 can be called extremely high throughput (EHT)
  • Non-HT extremely high throughput
  • the STA can perform uplink data transmission after obtaining the transmission right through channel competition, such as based on enhanced distributed channel access (enhanced distributed channel access, EDCA).
  • channel competition such as based on enhanced distributed channel access (enhanced distributed channel access, EDCA).
  • EDCA enhanced distributed channel access
  • 802.11ax an uplink transmission method based on a trigger frame is introduced, and its process includes the following steps.
  • Step 1 The AP first sends a trigger frame (such as the trigger frame (Tigger frame) in Figure 2a), which contains one or more stations (STA) to send a trigger-based PPDU (trigger based physical layer protocol data unit, TB PPDU) requires relevant information, such as resource unit allocation and other information.
  • a trigger frame such as the trigger frame (Tigger frame) in Figure 2a
  • STA stations
  • a trigger-based PPDU trigger based physical layer protocol data unit, TB PPDU
  • relevant information such as resource unit allocation and other information.
  • the entire trigger frame includes a common information (Common Info) field and a user information list (User Info List) field.
  • the public information field contains public information that all STAs need to read
  • the user information list field consists of one or more user information fields, and each user information field contains information that each STA needs to read respectively.
  • the association identification (Association Identification 12, AID12) indicates the association identification of a certain STA
  • the resource unit allocation subfield (RU Allocation) is used to indicate the specific allocation of this STA (the STA indicated by AID12).
  • the resource unit (Resource Unit, RU) location The specific content of the public information field and the user information field is shown in Figure 2b.
  • Step 2 After receiving the trigger frame, the STA parses out the user information field that matches its own AID, and then sends an efficient trigger-based PPDU (high efficient trigger based physical layer protocol data unit, HE TB PPDU) (one of the four HE PPDUs).
  • a trigger-based PPDU high efficient trigger based physical layer protocol data unit, HE TB PPDU
  • each field contained in the HE TB PPDU is shown in Figure 2c, and the names and functions of each field are as follows:
  • the entire bandwidth can be divided into one or more resource units. It is worth noting that in the 802.11ax standard, one STA can only be allocated one RU .
  • the next-generation 802.11be standard allows multiple RUs (multi-RU, MRU) to be allocated to one STA.
  • Step 3 After the AP receives the uplink multi-user PPDU composed of uplink sub-PPDUs sent by one or more stations, it can also reply an acknowledgment frame.
  • 802.11be there is also the process of triggering frame to trigger TB PPDU, which is similar to 11ax, except that some other signaling instructions are added or expanded, such as resource unit allocation in 320MHz, etc. Those skilled in the art can understand the added or expanded content, so no more description is given here.
  • the trigger frame structure of 11be is shown in Figure 2d.
  • the triggered station can adaptively adjust the size of the RU or MRU allocated by the trigger frame according to the detected channel busy or idle status, and select The RU or MRU that is smaller than the allocation of the trigger frame is sent to avoid the channel detected as busy, which will be described in detail below.
  • the trigger frame sent by the AP includes a carrier sensing required field, which is used to indicate that the station needs to perform carrier sensing; therefore, when the STA transmits the TB PPDU , Carrier sensing will be performed on one or more 20MHz sub-channels where the MRU/RU assigned to the STA is located, to detect whether the sensed energy exceeds a predetermined threshold. If the energy detected by the STA on a certain 20MHz sub-channel exceeds the predetermined threshold, it means that the 20MHz sub-channel is busy; if the energy detected by the STA on a certain 20MHz sub-channel does not exceed the predetermined threshold, It means that the 20MHz sub-channel is idle.
  • the 802.11ax standard stipulates that if at least one 20MHz sub-channel is busy in the frequency range where the RU assigned to the STA is busy, the HE TB PPDU cannot be transmitted to prevent interference with other transmissions.
  • Figure 3a is a schematic diagram of HE TB PPDU transmission for carrier sensing.
  • the allocated RU is 484-tone RU (where "tone” refers to a subcarrier), and the frequency range corresponding to 484-tone RU is 40MHz, including two 20MHz subchannels.
  • STA1 performs carrier sense before transmission. If one of the 20MHz sub-channels is found to be busy and the other 20MHz sub-channel is idle, STA1 cannot transmit on the allocated 484-tone RU.
  • the allocated RU is 242-tone RU, and the corresponding frequency range of 242-tone RU is 20MHz, including one 20MHz subchannel. STA4 performs carrier sense before transmission.
  • STA4 can transmit HE TB PPDU on the allocated 242-tone RU.
  • a 484-tone RU represents a resource unit including 484 subcarriers
  • a 242-tone RU represents a resource unit including 242 subcarriers.
  • the Z-tone-RU mentioned below has a similar meaning, that is, it represents a resource unit including Z (Z is a positive integer) subcarriers, which will not be described below.
  • the triggered station can adaptively allocate the RU from the trigger frame to the station according to the busy or idle state of the channel detected by the monitoring. Or select some RUs in the MRU (this part of the RUs is the adaptive RU) to transmit the TB PPDU, thereby avoiding the channel detected as busy.
  • FIG. 3b is a schematic diagram of transmitting a TB PPDU by using an adaptive RU.
  • the allocated RU is 484-tone RU, and the frequency range corresponding to 484-tone RU is 40MHz, including two 20MHz sub-channels.
  • STA1 performs carrier sense before transmission. If one of the 20MHz subchannels is found to be busy and the other 20MHz subchannel is idle, STA1 can transmit TB PPDUs on the idle 20MHz subchannel (or 242-tone RU). Among them, this idle 242-tone RU can be called adaptive RU.
  • the allocated RU is 242-tone RU, and the corresponding frequency range of 242-tone RU is 20MHz, including one 20MHz subchannel.
  • STA4 performs carrier sense before transmission, and if it finds that the 20MHz subchannel is idle, STA4 can transmit TB PPDUs on the allocated 242-tone RU.
  • bus sub-channel in this article refers to the status of the sub-channel is busy
  • the STA can still transmit if it meets the following two conditions:
  • the allocated MRU/RU includes at least one idle subchannel ("idle subchannel" in this article means that the state of the subchannel is idle);
  • the resource units corresponding to the at least one idle subchannel have available resource units that meet the regulations (not all resource unit styles can be supported for transmission).
  • the resource unit pattern can indicate the subcarrier pattern of the RU, such as 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, 996-tone RU , 2*996-tone RU can be regarded as RU of different resource unit styles.
  • the available resource unit that is, the adaptive RU
  • the available resource unit may be the MRU/RU format currently supported by 802.11be. For details, refer to the current description of the 802.11be standard. Since this application does not involve a specific adaptive RU format, it will not be described here.
  • this application uses adaptive RU to represent resource units with changing sizes (here, the resource units actually transmitted by the station are different from the size of the MRU/RU allocated to the station), and this term also covers adaptive MRU . No further distinction will be made later.
  • an adaptive RU is proposed for the MRU/RU in 802.11be, that is, the station transmits on some allocated idle sub-channels, which can use spectrum resources more efficiently.
  • the data field of 802.11 supports binary convolutional code (binary convolutional code, BCC) encoding method and LDPC encoding method.
  • BCC binary convolutional code
  • LDPC LDPC encoding method
  • Step A Calculate the number of available bits.
  • N pld length ⁇ 8+16 (1)
  • N pld indicates the physical layer service data unit (physical layer service data unit, PSDU) before encoding and the number of bits in the service field, and pld in N pld indicates a valid
  • the relationship between the load "payload” and the length value (length) is as described in the above formula; length is the value of the HT Length field in the HE-SIG field.
  • N avbits is the total number of bits after the initial usable encoding (avbits represents usable bit (available bits), why be called initial here, please refer to the description updated in the relevant step D later);
  • m STBC is: when Space-Time Block Coding (STBC) is used, it is 2, otherwise it is 1; R is the code rate, indicating the percentage of information bits to the total number of bits after encoding.
  • N CBPS coded bits per symbol
  • Step B Obtain the number of codewords N CW and the length of codewords L LDPC based on Navbits in step A.
  • the number of codewords N CW and the codeword length L LDPC corresponding to the N avbits can be obtained by looking up the PPDU encoding parameter table (PPDU encoding parameters) shown in Table 2 below.
  • the range of values (Range of Navbits) that the first row of data represents, unit is number of bits (bits);
  • the second row of data represents the number of LDPC codewords (Number of LDPC codewords), is denoted as N CW ;
  • the three columns of data represent the LDPC codeword length L LDPC (LDPC codeword length), denoted as L LDPC .
  • Step C Calculate the number of shortened bits based on Step A and Step B.
  • N shrt max(0,(N CW ⁇ L LDPC ⁇ R)-N pld ) (3);
  • N shrt represents the shortened bit
  • N CW ⁇ L LDPC ⁇ R represents the total number of bits of information bits (or the number of bits before encoding, or the number of bits without parity)
  • N pld represents the total number of bits that can be supported before encoding
  • max(A,B) represents the maximum value of A and B.
  • Step D Calculate the number of punctured bits.
  • N punc max(0,(N CW ⁇ L LDPC )-N avbits- N shrt ) (4);
  • the total number of encoded bits - the total number of available bits - the number of shortened bits can also be understood as (the total number of encoded bits - the number of shortened bits - the total number of available bits), which represents an additional check
  • the number of bits that is, the number that needs to be knocked out.
  • step D The updating process of step D is as follows.
  • the above-mentioned first condition means that if the number of bits of the check bits to be deleted exceeds 10% of the total number of bits of the check bits, and the number of check bits to be knocked out exceeds a certain percentage of shortened bits;
  • the above-mentioned second condition means that if the number of bits of the check bits to be discarded exceeds 30% of the total number of bits of the check bits.
  • condition 1 and condition 2 in step D is only an example, and the parameter "0.1” can also be replaced with other values (such as 0.11, 0.15, etc.), and the parameter "30%” can also be replaced with other values (such as 0.35, 0.4, etc.), this condition is mainly used to judge whether there is a lot of check digit data that is knocked out, which affects the performance of LDPC decoding.
  • N avbits N avbits + N CBPS ⁇ m STBC (5);
  • N punc max(0,(N CW ⁇ L LDPC )-N avbits- N shrt ) (6);
  • Step E Calculate the number of repeated bits.
  • step D The update process of the above step D is based on (condition one or condition two) in step D, the total number of available bits is not enough to support the parity bit and thus needs to knock down part of the parity bit.
  • the number of different codewords N CW and The selection of the code word length L LDPC may also have a situation where the total number of bits is greater than the parity bit and the shortened information. At this time, it is necessary to perform a repeat operation, as shown in formula (7), to complete The total number of bits available improves performance.
  • N rep max(0,N avbits- N CW ⁇ L LDPC ⁇ (1-R)-N pld ) (7);
  • N rep represents the number of bits to be repeatedly transmitted.
  • the 802.11 standard also provides the following LDPC encoding process diagram of the data field in the HT, as shown in FIG. 4 .
  • the process indicated by the arrow where (C) is located is, in the LDPC encoding (LDPC Encoding) in the above steps A, B and C, based on the concatenate parity method (concatenate parity), the calculation of the data bit (Data Bits), the implementation process of calculating the shortened bits (Shortened Bits) and calculating the parity bits (Parity Bits); (d) before the arrow is the encoding block obtained by discarding the shortened bits (Discard Shortened Bits).
  • the coded block is judged based on condition one and condition two in the aforementioned step D, and if the update process of step D is performed, as shown after the arrow in (d) in Figure 4, the Discard Parity bit (Discard Parity) is obtained. Bits) and obtain the coding block; if the repeating process of step E is performed, then as shown after the arrow in (e) in Figure 4, the coding block obtained by copying the repeated bits (Copy Repeat Bits) is obtained.
  • the biggest difference of LDPC encoding in EHT is that the padding of fragments (Padding) is added at the end of PPDU, as shown in Figure 5, which shows the last symbol involved in encoding, which is not all All the subcarriers are involved in encoding, but only part of the slices are encoded. This operation can only decode part of the subcarriers during decoding, thereby saving overhead.
  • Padding padding of fragments
  • PE packet extension
  • Pre-FEC padding bits indicate the padding bits before encoding, which will participate in encoding
  • FEC output bits are the bits output after encoding
  • Scrambler and FEC are scrambling using scrambling codes and FEC encoding respectively;
  • Post-FEC padding bits indicates the number of bits that need to be filled to the total number of bits after encoding, and does not participate in encoding
  • N CBPS,Last,u represents the number of encoded bits of the last symbol participating in the encoding
  • N CBPS,u represents the total number of bits of the last symbol involved in coding
  • N pld,u (N SYM,init -1)N DBPS,u +N DBPS,last,init,u (8);
  • N avbits,u (N SYM,init -1)N CBPS,u +N CBPS,last,init,u (9);
  • N SYM,init represents the number of initial symbols (similarly, it may be updated in step d, so here is the initial), N DBPS,last,init,u represents the data bits before encoding (related to a). a and N SYM, init can be calculated by the following formula (10) and formula (11).
  • Processes B and C are similar to HT, and the corresponding codeword number N CW and codeword length L LDPC can be obtained according to N avbits,u . If any user meets the judgment in step D (that is, there are too many holes), it is also necessary to increase the number of available bits to place some bits that should be knocked out, so as to increase the performance of LDPC encoding.
  • condition 1 and condition 2 of the judgment formula become as follows: condition 3 and condition 4:
  • condition 3 and condition 4 is only an example, and the parameter "0.1” can also be replaced with other values (such as 0.11, 0.15, etc.), and the parameter "30%” can also be replaced with other values (such as 0.35, 0.15, etc.). 0.4, etc.), this condition is mainly used to determine whether there is too much check digit data that has been knocked out, which affects the performance of LDPC decoding.
  • the update method is as follows:
  • the update method in EHT is no longer the same as that in HT.
  • EHT it is no longer increased according to the granularity of symbols, but is increased according to the granularity of symbol slices. This is because the number of subcarriers supported by each symbol in EHT is about 4 times higher than that of HT, so the increase in subcarriers
  • the granularity can be increased according to the granularity of the symbol slice, and does not need to be increased according to the granularity of the symbol.
  • N SYM and a are the values of N SYM,init and a init .
  • the update can be notified through the LDPC Extra Symbol Segment subfield in the EHT-SIG of the MU PPDU; for example, when the value of the LDPC Extra Symbol Segment subfield is 1, it indicates that there is an LDPC extra symbol segment, that is, an update is performed; When the value of the LDPC Extra Symbol Segment subfield is 0, it indicates that there is no LDPC extra symbol segment, that is, no update is performed.
  • the above mainly describes the difference between the LDPC encoding of MU PPDU in EHT and the LDPC encoding of PPDU in HT through formulas (8) to (13). Except for this difference, it is different from HT in which STA independently judges whether it is based on additional Symbol slices are used for transmission.
  • the AP indicates to the STA whether to transmit based on additional symbol slices.
  • the process of performing LDPC encoding on the TB PPDU by the EHT may also be implemented by using an LDPC encoding method similar to the aforementioned LDPC encoding on the MU PPDU in the EHT.
  • the AP can indicate N SYM and a to the STA through the trigger frame, where a is given directly, and N SYM is comprehensively calculated by multiple fields in the trigger frame get. It should be noted that what is given here is not the initial N SYM, init and a init , but the updated N SYM and a.
  • N SYM and a are the initial values and do not need to be updated in process D.
  • the STA judges whether there is an additional symbol segment for LDPC encoding, depending on the value of the LDPC Extra Symbol Segment subfield in the trigger frame sent by the AP, when it is 0 There is no additional symbol slice, and when it is 1, there is an extra symbol slice.
  • the value of the LDPC Extra Symbol Segment subfield in the trigger frame is judged by the AP that sends the trigger frame based on its allocated resources.
  • the AP sets The provisions may not apply to the changed TB PPDU based on adaptive RU transmission.
  • step S101 and step S102 can be executed in one step, or can be divided into two steps; and, when step S101 and step S102 are divided into two steps, step S101 is executed first and then step S102 is executed, or Step S102 is executed first and then step S101 is executed, which is not limited here.
  • FIG. 6 is a schematic diagram of a communication method provided by an embodiment of the present application, and the method includes the following steps.
  • the AP sends first indication information.
  • the AP sends the first indication information in step S101, and correspondingly, the STA receives the first indication information in step S101.
  • the first indication information is used to indicate the first RU of the STA.
  • the first RU is an RU or an MRU. That is to say, the first RU indicated by the AP through the first indication information in step S101 may be an RU or an MRU, so that the solution is adapted to different RU allocation scenarios.
  • the first indication information can be realized through the resource unit allocation (RU Allocation) field in the aforementioned Figure 2b, or through the resource unit allocation (RU Allocation) field in the aforementioned Figure 2d, or indicate the STA's first One RU, not limited here.
  • the first indication information is carried in a trigger frame, and the trigger frame further includes third indication information, where the third indication information is used to indicate that there is an LDPC extra symbol fragment.
  • the first indication information used to indicate to the STA the first RU of the STA is carried in the trigger frame, and the trigger frame further includes third indication information used to indicate the existence of LDPC extra symbol fragments , so that multiple indication information can be carried through the same trigger frame, which can save overhead and further improve communication efficiency.
  • the third indication information includes an LDPC Extra Symbol Segment subfield (LDPC Extra Symbol Segment subfield), and when the value of the LDPC Extra Symbol Segment subfield is 1, it indicates that there is an LDPC Extra Symbol Segment.
  • LDPC Extra Symbol Segment subfield when the value of the LDPC Extra Symbol Segment subfield is 1, it indicates that there is an LDPC Extra Symbol Segment.
  • the value of the LDPC extra symbol slice subfield is 0, it indicates that there is no LDPC extra symbol slice.
  • the AP sends second indication information.
  • the AP sends the second indication information in step S102, and correspondingly, the STA receives the second indication information in step S102.
  • the second indication information is used to indicate whether the STA is allowed to send the PPDU based on a part of the RUs in the first RU, and the second indication information indicates that when the STA is allowed to send the PPDU based on a part of the RUs in the first RU, the The PPDU includes LDPC extra symbol fragmentation.
  • the PPDU when the second indication information indicates that the STA is allowed to send the PPDU based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragments" may indicate that when the second indication information indicates that the When the STA sends a PPDU based on a part of the RUs in the first RU, and when the PPDU is sent by the STA based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragments; The information indicates that the STA is allowed to send the PPDU based on a part of the first RUs and the PPDU includes LDPC extra symbol fragments; it may also indicate that the second indication information indicates that the STA is allowed to send the PPDU based on a part of the first RUs. The PPDU and the second indication information further indicate that the PPDU includes LDPC extra symbol fragments.
  • the second indication information sent by the AP in step S102 may also be associated with the trigger frame for sending.
  • the trigger frame is carried in the second PPDU
  • the second indication information is carried in the second PPDU.
  • the trigger frame including the first indication information and the third indication information is carried in the second PPDU, and the message sent by the AP in step S102 to indicate whether the STA is allowed to send the PPDU based on a part of the allocated first RUs.
  • the second indication information is also carried in the second PPDU, so that multiple indication information can be carried through the same PPDU, which can save overhead and further improve communication efficiency.
  • the second indication information may be expressed as an adaptive RU allowable field, or the second indication information may be expressed as an adaptive RU allowable subfield, or the second indication information may be expressed as an adaptive TB PPDU allowable field, or , the second indication information may be expressed as an adaptive TB PPDU allowable subfield.
  • the second indication information is realized by indicating whether to allow the use of the Adaptive RU Allowed subfield (Adaptive RU Allowed subfield), and the third indication information is realized by indicating the LDPC Extra Symbol Segment field (LDPC Extra Symbol Segment field) .
  • At least the second row of data is included, that is, the value of Adaptive RU Allowed subfield is 1 and the value of LDPC Extra Symbol Segment field is 1, indicating that the STA is allowed to send PPDU based on a part of the first RU (or indicating Allows the use of adaptive RU, or other indications, etc.) and indicates the presence of LDPC extra symbol slices (or indicates that PPDUs are sent based on LDPC extra symbol slices, or other indications, etc.).
  • the third row of data is also included in Table 3, that is, the value of Adaptive RU Allowed subfield is 0 and the value of LDPC Extra Symbol Segment field is 0, indicating that the STA is not allowed to send PPDU based on a part of RUs in the first RU (or indicate that the use of adaptive RU is not allowed, or other indications, etc.) and indicate that there is no LDPC extra symbol segmentation (or indicate that it is not allowed to send PPDU based on the LDPC extra symbol segmentation, or other indications, etc.).
  • the fourth row of data is also included in Table 3, that is, the value of the Adaptive RU Allowed subfield is 0 and the value of the LDPC Extra Symbol Segment field is 1, indicating that the STA is not allowed to send PPDUs based on a part of the RUs in the first RU (or indicate that adaptive RU is not allowed, or other indications, etc.) and indicate the existence of LDPC extra symbol fragments (or indicate that PPDUs are allowed to be sent based on LDPC extra symbol fragments, or other indications, etc.).
  • the LDPC Extra Symbol Segment subfield can only be equal to 1; or in other words, when the Adaptive RU (or Adaptive TB PPDU) is allowed to exist
  • the LDPC Extra Symbol Segment subfield must not be 0, that is, there are LDPC extra symbol segments in the PPDU sent by the STA.
  • the LDPC Extra Symbol Segment subfield can be equal to 1 or 0.
  • the aforementioned Table 3 is only an implementation example.
  • the second indication information and the third indication information may also be carried in other ways, such as multiplexing the same field indication, or other implementation ways. There is no limit here.
  • the second PPDU includes first information different from the trigger frame, and the second indication information is carried in the first information; wherein, the first information may be information in a preamble (preamble), and control Frames, management frames, etc., are not limited here.
  • the second indication information and the third indication information may also be implemented in other manners, which will be described in Table 4 below.
  • the second indication information can indicate that the STA is allowed to be based on Some RUs in the first RU send PPDUs (or indicate that adaptive RUs are allowed, or other indications, etc.) and indicate the existence of LDPC extra symbol fragments (or indicate that PPDUs are sent based on LDPC extra symbol fragments, or other indications, etc.) .
  • the third indication information is Reserved, which means Reserved when the value of the Adaptive RU Allowed subfield is 1.
  • the Adaptive RU Allowed subfield in the second row of data sent by the AP or read by the STA is 1 in step S102, it means that the Adaptive RU is allowed and there is an LDPC extra symbol fragment.
  • Table 4 also includes the third row of data, that is, the value of the Adaptive RU Allowed subfield is 0 and the value of the LDPC Extra Symbol Segment field is 0, indicating that the STA is not allowed to send PPDUs based on some RUs in the first RU ( Or indicate that the use of adaptive RU is not allowed, or other indications, etc.) and indicate that there is no LDPC extra symbol fragmentation (or indicate that it is not allowed to send PPDU based on the LDPC extra symbol fragmentation, or other indications, etc.).
  • the fourth row of data is also included in Table 4, that is, the value of the Adaptive RU Allowed subfield is 0 and the value of the LDPC Extra Symbol Segment field is 1, indicating that the STA is not allowed to send PPDUs based on a part of the RUs in the first RU (or indicate that adaptive RU is not allowed, or other indications, etc.) and indicate the existence of LDPC extra symbol fragments (or indicate that PPDUs are allowed to be sent based on LDPC extra symbol fragments, or other indications, etc.).
  • the second indication information and the third indication information may also be implemented in other ways, where the second indication information and the third indication information may be indicated simultaneously through the same field (or bit), for example Specifically, the LDPC Extra Symbol segment field and the Adaptive RU allowed subfield can be combined, that is, there is no Adaptive RU Allowed subfield, and only the LDPC Extra Symbol segment field is used to represent the second indication information and the third indication information.
  • LDPC Extra Symbol Segment field when the value of the LDPC Extra Symbol Segment field is 1, it indicates that there is an LDPC extra symbol segment, and Adaptive RU (or Adaptive TB PPDU) is allowed.
  • the value of the LDPC Extra Symbol Segment field when the value of the LDPC Extra Symbol Segment field is 0, it indicates that there is no LDPC extra symbol fragmentation, and Adaptive RU (or allow Adaptive TB PPDU); or, when the value of the LDPC Extra Symbol Segment field is 0 , indicating that there is no LDPC extra symbol fragmentation, and Adaptive RU is not allowed (or Adaptive TB PPDU is not allowed).
  • the STA sends the first PPDU based on the first indication information and the second indication information.
  • the STA sends the first PPDU in step S103 based on the first indication information received in step S101 and the second indication information received in step S102; correspondingly, the AP receives the first PPDU in step S103.
  • the second RU occupied by the first PPDU is a part of RUs in the first RU, and the first PPDU includes the LDPC extra symbol slice.
  • the second RU occupied by the first PPDU is an RU, or the second RU occupied by the first PPDU is an MRU.
  • the basis for determining the second RU occupied by the first PPDU may include other determination basis besides the first indication information and the second indication information, for example, through the aforementioned
  • the STA determines whether the channel where the RU is located is an idle channel, or the STA uses the result of carrier sensing and channel detection as the basis for determination, or other implementation methods. There is no limit.
  • the first PPDU sent by the STA in step S103 includes fourth indication information, where the fourth indication information is used to indicate whether the first PPDU includes an LDPC extra symbol segment.
  • the AP may also determine whether the configuration of the first PPDU includes the LDPC extra symbol fragment based on the fourth indication information in the first PPDU, so that the AP subsequently bases
  • the fourth indication information parses the first PPDU, improves the success rate of parsing the first PPDU at the AP side, and further improves communication efficiency.
  • the method may further include: first, the AP determines the configuration mode of the first PPDU according to the size of the first PPDU, the The configuration method includes configuring the first PPDU based on the presence of LDPC extra symbol fragments; thereafter, the AP parses the PPDU according to the configuration method.
  • the AP may also determine the configuration method of the first PPDU based on the size of the first PPDU to configure the first PPDU based on the presence of LDPC extra symbol fragments, so that The AP parses the first PPDU based on the configuration mode. It prevents the AP from parsing the first PPDU according to the configuration mode not based on the presence of LDPC extra symbol fragments, improves the success rate of parsing the first PPDU on the AP side, and further improves communication efficiency.
  • the configuring manner further includes configuring the first PPDU in a manner that no LDPC extra symbol fragment exists.
  • the AP parses the PPDU according to the configuration mode, which may also be referred to as the AP decoding the PPDU according to the configuration mode.
  • the LDPC extra symbol slices include post-forward error correction padding (post-FEC padding) type extra symbol slices.
  • the symbol slices applied by EHT include different types. Compared with the current EHT that can only be applied to the implementation of additional symbol slices of the pre-forward error correction padding (pre-FEC padding) type, the LDPC additional The symbol slicing is further expanded, so that additional symbol slicing of the post-FEC padding type can be used, further improving communication efficiency.
  • the part of 1/4 symbols (such as the pre-FEC padding part in Figure 5) is used as an additional symbol slice, and the remaining parts (such as the The post-FEC padding in 5) is generally not used to carry valid information, so as to reserve the duration corresponding to the post-FEC padding (ie 3/4 symbols) for the receiving side, and give the receiver more processing time.
  • the post-FEC padding method is used to expand additional symbol slices, that is, when additional symbol slices are required for encoding to generate PPDUs, a init and N SYM, init is still equal to the a and N SYM configured by the AP in the trigger frame, that is, it is not necessary to perform the update process in the aforementioned formula (14), subtract 1 from the value of N SYM or change the value of a init Subtract 1; and, in step D, always update by the aforementioned formula (13), that is, by adopting when a ⁇ 4 (or a init ⁇ 4), a+1 (or a init +1) and the sign remains unchanged to expand the symbol slice. This can also achieve the acquisition of additional symbol slices.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • the second indication information sent by the AP in step S102 is used to indicate whether the STA is allowed to send PPDUs based on a part of the allocated first RUs, and the second indication information indicates that the STA is allowed to send PPDUs.
  • the PPDU includes LDPC extra symbol fragments.
  • the STA when the STA sends a PPDU based on a part of the RUs in the first RU allocated by the first indication information in step S103, the PPDU is configured based on the LDPC extra symbol fragmentation, so that the STA is configured based on the LDPC extra symbol fragment in the adaptive RU for transmission. Therefore, when the AP specifies that the STA does not transmit based on symbol slices, the situation that the STA does not adapt to the specification when transmitting on the adaptive RU and the decoding performance decreases on the AP side is avoided, so as to improve WLAN communication efficiency.
  • FIG. 7 is a schematic diagram of a communication method provided by an embodiment of the present application, and the method includes the following steps.
  • the AP generates a trigger frame.
  • the AP generates a trigger frame in step S201, and the trigger frame includes first indication information and third indication information, wherein the first indication information is used to indicate the first RU of the STA, and the third indication information Used to indicate whether there are LDPC extra symbol slices.
  • the AP sends a trigger frame.
  • the AP sends the trigger frame generated in step S201 in step S202, and correspondingly, the STA receives the trigger frame in step S202.
  • step S201 and step S202 reference may be made to the implementation process of the aforementioned step S101 and step S102 (when both the first indication information and the third indication information are carried in the trigger frame), and will not be repeated here.
  • the STA determines the second RU based on the trigger frame.
  • step S203 the STA determines the second RU based on the trigger frame received in step S202.
  • the second RU is a part of the first RU, and the third indication information indicates that there is no LDPC extra symbol fragment
  • the first PPDU is sent based on the second RU, the first PPDU is unnecessary PPDU of LDPC extra symbol fragmentation.
  • the second RU is an RU, or the second RU is an MRU.
  • step S203 in step S203, the STA determines the basis for determining the second RU in addition to the trigger frame, and may also include other basis for determining, for example, in the manner shown in FIG. 3a and FIG. Whether an idle channel is used as the basis for determination, or whether the STA uses the result of carrier sensing or channel detection as the basis for determination, or other implementation manners, is not limited here.
  • the adaptive PPDU (or adaptive TB PPDU) mentioned in any embodiment of the present application is a PPDU (or called TB PPDU) sent based on an adaptive RU, which is used to indicate that an STA sends an adaptive RU resource based The PPDU (or TB PPDU).
  • the STA sends the first PPDU based on the adaptive RU in step S203
  • the STA performs LDPC encoding on the data to be sent to generate the first PPDU, it does not need to go through the update process shown in the foregoing formula (13) or (14) to encode and generate the first PPDU.
  • the adaptive RU (or adaptive TB PPDU) selected by the STA in step S203 needs to be selected from the RU set corresponding to LDPC Extra Symbol Segment subfield with a value of 0, or not in Select from the RU set whose LDPC Extra Symbol Segment subfield value is 1.
  • the STA sends the PPDU based on the adaptive RU in step S203.
  • the selection of adaptive RUs is not limited.
  • the way the STA selects an Adaptive RU that does not require additional symbol fragmentation can be: select an Adaptive RU that does not require additional symbol fragmentation in the supported TB PPDU to send; or, it can also be in the supported TB PPDU Select the Adaptive RU with the largest RU size that does not require additional symbol fragmentation; or, select the Adaptive RU with the smallest RU size that does not require additional symbol fragmentation in the supported TB PPDU; or other implementation methods, here No limit.
  • step S203 determines in step S203 that there is no adaptive RU that does not require additional symbol slices.
  • the STA includes fourth indication information based on the first PPDU sent by the second RU, where the fourth indication information is used to indicate whether the first PPDU includes the LDPC extra symbol segment .
  • the AP may also determine whether the configuration of the first PPDU includes the LDPC extra symbol fragment based on the fourth indication information in the first PPDU, so that the AP subsequently bases
  • the fourth indication information parses the first PPDU, improves the success rate of parsing the first PPDU at the AP side, and further improves communication efficiency.
  • step S203 after the STA sends the first PPDU based on the second RU in step S203, that is, after the AP receives the first PPDU in step S203, the method may further include: First, the AP determines the configuration mode of the first PPDU according to the size of the first PPDU, and the configuration mode includes a mode based on LDPC extra symbol fragmentation; then, the AP parses the PPDU according to the configuration mode. Specifically, after the AP receives the first PPDU from the STA in step S203, it may also determine the configuration method of the first PPDU based on the size of the first PPDU to configure the first PPDU based on the existence of LDPC extra symbol fragmentation.
  • the AP parses the first PPDU based on the configuration mode.
  • the configuring manner further includes configuring the first PPDU in a manner that no LDPC extra symbol fragment exists.
  • the AP parses the PPDU according to the configuration mode, which may also be referred to as the AP decoding the PPDU according to the configuration mode.
  • the LDPC extra symbol slices include post-forward error correction padding (post-FEC padding) type extra symbol slices.
  • the symbol slices applied by EHT include different types. Compared with the current EHT that can only be applied to the implementation of additional symbol slices of the pre-forward error correction padding (pre-FEC padding) type, the LDPC additional The symbol slicing is further expanded, so that additional symbol slicing of the post-FEC padding type can be used, further improving communication efficiency.
  • the part of 1/4 symbols (such as the pre-FEC padding part in Figure 5) is used as an additional symbol slice, and the remaining parts (such as the The post-FEC padding in 5) is generally not used to carry valid information, so as to reserve the duration corresponding to the post-FEC padding (ie 3/4 symbols) for the receiving side, and give the receiver more processing time.
  • the post-FEC padding method is used to expand additional symbol slices, that is, when additional symbol slices are required for encoding to generate PPDUs, a init and N SYM, init is still equal to the a and N SYM configured by the AP in the trigger frame, that is, it is not necessary to perform the update process in the aforementioned formula (14), subtract 1 from the value of N SYM or change the value of a init Subtract 1; and, in step D, always update by the aforementioned formula (13), that is, by adopting when a ⁇ 4 (or a init ⁇ 4), a+1 (or a init +1) and the sign remains unchanged to expand the symbol slice. This can also achieve the acquisition of additional symbol slices.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • the trigger frame generated and sent by the AP includes the first indication information for indicating the first RU of the STA and the first indication information for indicating whether there is an LDPC extra symbol fragment.
  • the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation. That is to say, when the STA selects an adaptive RU based on the allocated first RU in step S203, the STA selects an adaptive RU corresponding to a PPDU that does not require LDPC extra symbol fragmentation, and transmits the first PPDU based on the adaptive RU.
  • the AP specifies that the STA does not transmit based on symbol slices, the STA does not adapt to the specification when transmitting on the adaptive RU, and the decoding performance decreases on the AP side, so that the STA transmits the PPDU based on the adaptive RU. It is adapted to the designation of the AP in real time to improve WLAN communication efficiency.
  • FIG. 8 is a schematic diagram of a communication method provided by an embodiment of the present application, and the method includes the following steps.
  • the AP generates a trigger frame.
  • the AP generates a trigger frame in step S301, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA.
  • the AP sends a trigger frame.
  • the AP sends the trigger frame generated in step S301 in step S302, and correspondingly, the STA receives the trigger frame in step S302.
  • step S301 and step S302 reference may be made to the implementation process of the aforementioned step S101 and step S102 (when the first indication information is carried in the trigger frame), which will not be repeated here.
  • the STA sends the first PPDU based on the second RU determined by the trigger frame.
  • step S303 the STA sends the first PPDU based on the second RU determined by the trigger frame received in step S302; correspondingly, the AP receives the first PPDU in step S303.
  • the first PPDU includes LDPC extra symbol fragments
  • the second RU is a part of the first RU.
  • the second RU is an RU, or the second RU is an MRU.
  • step S303 in step S303, the STA determines the basis for determining the second RU in addition to the trigger frame, and may also include other determination basis. Whether an idle channel is used as the basis for determination, or whether the STA uses the result of carrier sensing or channel detection as the basis for determination, or other implementation manners, is not limited here.
  • step S303 when the STA determines in step S303 to send the first PPDU based on the adaptive RU, no matter how the LDPC Extra Symbol Segment subfield in the trigger frame sent by the AP in step S302 is set (that is, no matter how the third indication information indicates),
  • the PPDUs sent by the STA based on the adaptive RU are all configured with the LDPC Extra Symbol Segment subfield equal to 1, that is, the N SYM and a are always obtained by the aforementioned formula (14).
  • step D it is always considered that it needs to be updated in step D, that is, it will always be increased in step D (indicating that the bits that need to be punctured become less), There is no need to go through the judging process of the aforementioned conditions (for example, condition 1, condition 2, condition 3 or condition 4).
  • condition 1, condition 2, condition 3 or condition 4 the STA sends the first PPDU based on the adaptive RU in step S303, it always encodes the first PPDU based on the presence of additional symbol slices.
  • the STA includes fourth indication information based on the first PPDU sent by the second RU, where the fourth indication information is used to indicate whether the first PPDU includes the LDPC extra symbol segment .
  • the AP may also determine whether the configuration of the first PPDU includes the LDPC extra symbol fragment based on the fourth indication information in the first PPDU, so that the AP subsequently bases
  • the fourth indication information parses the first PPDU, improves the success rate of parsing the first PPDU at the AP side, and further improves communication efficiency.
  • step S303 after the STA sends the first PPDU based on the second RU in step S303, that is, after the AP receives the first PPDU in step S303, the method may further include: First, the AP determines the configuration mode of the first PPDU according to the size of the first PPDU, and the configuration mode includes configuring the first PPDU based on the presence of LDPC extra symbol fragments; thereafter, the AP parses the PPDU according to the configuration mode .
  • the AP may also determine the configuration method of the first PPDU based on the size of the first PPDU to configure the first PPDU based on the existence of LDPC extra symbol fragmentation. , so that the AP parses the first PPDU based on the configuration mode. Prevent the AP from parsing the first PPDU according to a configuration method that does not configure the first PPDU based on the presence of LDPC extra symbol fragments, improve the success rate of parsing the first PPDU on the AP side, and further improve communication efficiency.
  • the configuring manner further includes configuring the first PPDU in a manner that no LDPC extra symbol fragment exists.
  • the AP parses the PPDU according to the configuration mode, which may also be referred to as the AP decoding the PPDU according to the configuration mode.
  • the LDPC extra symbol slices include post-forward error correction padding (post-FEC padding) type extra symbol slices.
  • the symbol slices applied by EHT include different types. Compared with the current EHT that can only be applied to the implementation of additional symbol slices of the pre-forward error correction padding (pre-FEC padding) type, the LDPC additional The symbol slicing is further expanded, so that additional symbol slicing of the post-FEC padding type can be used, further improving communication efficiency.
  • the part of 1/4 symbols (such as the pre-FEC padding part in Figure 5) is used as an additional symbol slice, and the remaining parts (such as the The post-FEC padding in 5) is generally not used to carry valid information, so as to reserve the duration corresponding to the post-FEC padding (ie 3/4 symbols) for the receiving side, and give the receiver more processing time.
  • the post-FEC padding method is used to expand additional symbol slices, that is, when additional symbol slices are required for encoding to generate PPDUs, a init and N SYM, init is still equal to the a and N SYM configured by the AP in the trigger frame, that is, it is not necessary to perform the update process in the aforementioned formula (14), subtract 1 from the value of N SYM or change the value of a init Subtract 1; and, in step D, always update by the aforementioned formula (13), that is, by adopting when a ⁇ 4 (or a init ⁇ 4), a+1 (or a init +1) and the sign remains unchanged to expand the symbol slice. This can also achieve the acquisition of additional symbol slices.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • the trigger frame received by the STA in step S302 includes the first indication information used to indicate the first RU of the STA; thereafter, the STA transmits the second RU determined based on the trigger frame in step S303.
  • the first PPDU includes an LDPC extra symbol segment
  • the second RU is a part of the first RU. That is to say, when the STA selects the second RU as the adaptive RU based on the allocated first RU in step S303, the first PPDU transmitted by the STA on the adaptive RU includes LDPC extra symbol segments.
  • the STA does not adapt to the specification when transmitting on the adaptive RU, resulting in low communication efficiency, so that the PPDU transmitted by the STA based on the adaptive RU includes LDPC additional symbol fragmentation to improve WLAN communication efficiency.
  • FIG. 9 is a schematic diagram of a communication method provided by an embodiment of the present application, and the method includes the following steps.
  • the AP generates a trigger frame.
  • the AP generates a trigger frame in step S401, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA.
  • the AP sends a trigger frame.
  • the AP sends the trigger frame generated in step S401 in step S402, and correspondingly, the STA receives the trigger frame in step S402.
  • step S401 and step S402 reference may be made to the implementation process of the aforementioned step S101 and step S102 (when the first indication information is carried in the trigger frame), which will not be repeated here.
  • the STA sends a PPDU based on the trigger frame.
  • the STA sends the PPDU in step S403 based on the trigger frame received in step S402; correspondingly, the AP receives the PPDU in step S403.
  • the implementation manner of sending the PPDU by the STA in step S403 may adopt the implementation manner of the aforementioned step S103; or, the implementation manner of sending the PPDU by using the second RU determined in the aforementioned step S203; or, adopt the implementation manner of the aforementioned step S303
  • the implementation of sending the first PPDU by the second RU determined based on the trigger frame; or, in the current EHT, the AP can indicate the NSYM and a to the STA through the trigger frame to send the PPDU; or other implementations, here There is no limit.
  • step S403 if the PPDU sent by the STA is based on the PPDU sent by the second RU in the first RU indicated by the trigger frame, the second RU is an RU, or the second RU is an MRU.
  • the STA may determine the basis for determining the second RU in addition to the trigger frame, and may also include other determination criteria. Whether an idle channel is used as the basis for determination, or whether the STA uses the result of carrier sensing or channel detection as the basis for determination, or other implementation manners, is not limited here.
  • the AP determines the configuration mode of the PPDU based on the size of the PPDU.
  • the AP determines the configuration mode of the PPDU based on the size of the PPDU received in step S403.
  • the configuration method includes configuring the PPDU based on the existence of LDPC extra symbol fragments
  • the configuration method includes configuring the PPDU based on the existence of LDPC extra symbol fragments.
  • step S404 the AP determines the configuration method of the PPDU according to the size of the PPDU received in step S403, and the configuration method includes configuring the PPDU based on the existence of LDPC extra symbol fragments; way to parse the PPDU. Therefore, the AP is prevented from parsing the first PPDU according to a configuration method that does not configure the first PPDU based on the existence of LDPC extra symbol fragments, and the success rate of parsing the first PPDU on the AP side is improved, thereby further improving communication efficiency.
  • the configuring manner further includes configuring the first PPDU in a manner that no LDPC extra symbol fragment exists.
  • the AP parses the PPDU according to the configuration mode, which may also be referred to as the AP decoding the PPDU according to the configuration mode.
  • the AP receives the STA in step S403 based on the adaptation
  • the AP will judge which configuration the site adopts according to the size of the PPDU: that is, the configuration in which the LDPC Extra Symbol Segment subfield is equal to 1 or equal to 0 is adopted.
  • the judging process can be judged by using the conditions described above (eg, condition 1, condition 2, condition 3 or condition 4), which will not be repeated here.
  • step S403 the STA performs LDPC encoding on the data to be sent to obtain the PPDU encoding process, and no longer follows the default fallback introduced in the TB PPDU (in the aforementioned formula (8) and formula (9)) and then (in the aforementioned In the formula (13),) is added back, but first try to check whether the configuration with LDPC Extra Symbol Segment subfield equal to 0 has too many holes (judged according to the conditions described above, if the conditions are met, there are too many holes); If there are too many, the configuration with LDPC Extra Symbol Segment subfield equal to 1 is adopted.
  • the AP also knows the size of the adaptive RU when it receives the TB PPDU in step S403, it can also be judged according to the conditions described above in step S404. If the configuration of 0 is used, too many holes will be punched. This adaptive TB PPDU is configured using extra symbol fragmentation.
  • the LDPC extra symbol fragments may include post-forward error correction padding (post-FEC padding) type extra symbols Fragmentation.
  • post-FEC padding post-forward error correction padding
  • the symbol slices applied by EHT include different types. Compared with the current EHT that can only be applied to the implementation of additional symbol slices of the pre-forward error correction padding (pre-FEC padding) type, the LDPC additional The symbol slicing is further expanded, so that additional symbol slicing of the post-FEC padding type can be used, further improving communication efficiency.
  • the part of 1/4 symbols (such as the pre-FEC padding part in Figure 5) is used as an additional symbol slice, and the remaining parts (such as the The post-FEC padding in 5) is generally not used to carry valid information, so as to reserve the duration corresponding to the post-FEC padding (ie 3/4 symbols) for the receiving side, and give the receiver more processing time.
  • the post-FEC padding method is used to expand additional symbol slices, that is, when additional symbol slices are required for encoding to generate PPDUs, a init and N SYM, init is still equal to the a and N SYM configured by the AP in the trigger frame, that is, it is not necessary to perform the update process in the aforementioned formula (14), subtract 1 from the value of N SYM or change the value of a init Subtract 1; and, in step D, always update by the aforementioned formula (13), that is, by adopting when a ⁇ 4 (or a init ⁇ 4), a+1 (or a init +1) and the sign remains unchanged to expand the symbol slice. This can also achieve the acquisition of additional symbol slices.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • FIG. 10 is a schematic diagram of a communication method provided by an embodiment of the present application, and the method includes the following steps.
  • the AP generates a trigger frame.
  • the AP generates a trigger frame in step S501, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA.
  • the AP sends a trigger frame.
  • the AP sends the trigger frame generated in step S501 in step S502, and correspondingly, the STA receives the trigger frame in step S502.
  • step S501 and step S502 reference may be made to the implementation process of the aforementioned step S101 and step S102 (when the first indication information is carried in the trigger frame), which will not be repeated here.
  • the STA sends a PPDU based on the trigger frame.
  • the STA sends the PPDU in step S503 based on the trigger frame received in step S502; correspondingly, the AP receives the PPDU in step 403.
  • the PPDU includes fourth indication information, and the fourth indication information is used to indicate whether the PPDU includes LDPC extra symbol fragments.
  • the STA may send the PPDU based on a part of the first RU indicated by the trigger frame.
  • step S503 if the PPDU sent by the STA is based on the PPDU sent by some RUs in the first RUs indicated by the trigger frame, some of the RUs in the first RUs are RUs, or the first RUs A part of RU is MRU.
  • the basis for determining a part of RUs in the first RU may include other determination basis besides the trigger frame.
  • the channel where the RU is located is an idle channel is used as a basis for determination, or the STA uses the result of carrier sensing or channel detection as a basis for determination, or other implementation methods, which are not limited here.
  • the PPDU has an LDPC Extra Symbol Segment indication (that is, the fourth indication information), and can inform the AP of the configuration mode of the PPDU.
  • the LDPC Extra Symbol Segment indicates a value of 1, it means that the STA encodes and generates the PPDU based on the update process shown in the foregoing formula (13) or (14), that is, in the process of encoding and generating the PPDU , the used parameters a init and N SYM, init is not the a and N SYM configured by the AP trigger frame in step S502; when the LDPC Extra Symbol Segment indicates a value of 0, it means that the STA is not based on the aforementioned formula (13 ) or the update process shown in (14) to encode and generate the PPDU, that is, in the process of encoding and generating the PPDU, the parameters a init and N SYM used, init are the a and N SYM configured by the AP in step S502 to trigger the frame N SYM .
  • the value of this field is only for illustration, and the fourth indication information can also be realized through other field names or field values.
  • the value of the LDPC Extra Symbol Segment is 0, it indicates that the STA In step S503, the PPDU is sent based on the existence of LDPC extra symbol fragments; for another example, when the value of the LDPC Extra Symbol Segment is 1, it indicates that the STA does not send the PPDU based on the existence of LDPC extra symbol fragments in step S503 ; or other implementation methods, which are not limited here.
  • step S503 if the AP sets the value of the LDPC Extra Symbol Segment subfield to 0 in the trigger frame sent in step S502 (that is, the third indication information in the trigger frame indicates that there is no LDPC extra symbol segment), in step S503, based on the adaptation
  • the STA of the PPDU sent by the RU can still decide whether to use the configuration of 0 or 1 (that is, the STA decides whether to generate the PPDU based on the encoding method of LDPC extra symbol fragmentation), and inform the AP in the fourth indication information in the PPDU The configuration.
  • the LDPC extra symbol fragments include post-forward error correction padding (post-FEC padding) additional symbol fragments.
  • the symbol slices applied by EHT include different types. Compared with the current EHT that can only be applied to the implementation of additional symbol slices of the pre-forward error correction padding (pre-FEC padding) type, the LDPC additional The symbol slicing is further expanded, so that additional symbol slicing of the post-FEC padding type can be used, further improving communication efficiency.
  • the part of 1/4 symbols (such as the pre-FEC padding part in Figure 5) is used as an additional symbol slice, and the remaining parts (such as the The post-FEC padding in 5) is generally not used to carry valid information, so as to reserve the duration corresponding to the post-FEC padding (ie 3/4 symbols) for the receiving side, and give the receiver more processing time.
  • the post-FEC padding method is used to expand additional symbol slices, that is, when additional symbol slices are required for encoding to generate PPDUs, a init and N SYM, init is still equal to the a and N SYM configured by the AP in the trigger frame, that is, it is not necessary to perform the update process in the aforementioned formula (14), subtract 1 from the value of N SYM or change the value of a init Subtract 1; and, in step D, always update by the aforementioned formula (13), that is, by adopting when a ⁇ 4 (or a init ⁇ 4), a+1 (or a init +1) and the sign remains unchanged to expand the symbol slice. This can also achieve the acquisition of additional symbol slices.
  • the LDPC extra symbol slice includes an extra symbol slice of pre-FEC padding type.
  • the AP may also determine whether the configuration of the first PPDU includes the LDPC extra symbol fragment based on the fourth indication information in the first PPDU , so that the AP subsequently parses the first PPDU based on the fourth indication information, so as to improve the success rate of parsing the first PPDU at the AP side, and further improve communication efficiency.
  • FIG. 11 is a schematic diagram of a communication device 1100 provided by an embodiment of the present application.
  • the communication device 1100 includes a transceiver unit 1101 .
  • the communication device 1100 further includes a processing unit 1102 .
  • the transceiving unit 1101 is used to perform the receiving or sending process of the communication device 1100, therefore, the transceiving unit 1101 may also be denoted as the sending unit 11011 used to perform the sending process of the communication device 1100, and/or , the transceiver unit 1101 may also be represented as a receiving unit 11012 for performing a receiving process of the communication device 1100 .
  • the communication device 1100 is configured to execute the implementation process of the AP in the foregoing embodiments of the present application.
  • the communication device 1100 includes a sending unit 11011 and a receiving unit 11012;
  • the sending unit 11011 is configured to send first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the sending unit 11011 is further configured to send second indication information, where the second indication information is used to indicate whether the STA is allowed to send PPDUs based on a part of the RUs in the first RU, and the second indication information indicates that the STA is allowed When sending the PPDU based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragmentation;
  • the receiving unit 11012 is configured to receive a first PPDU, wherein the second RU occupied by the first PPDU is a part of RUs in the first RU, and the first PPDU includes the LDPC extra symbol segment.
  • the communication device 1100 includes a transceiver unit 1101 and a processing unit 1102;
  • the processing unit 1102 is configured to generate a trigger frame, where the trigger frame includes first indication information and third indication information, where the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether There are LDPC extra symbol slices;
  • the transceiver unit 1101 is configured to send the trigger frame.
  • the communication device 1101 includes a transceiver unit 1101 and a processing unit 1102;
  • the processing unit 1102 is configured to generate a trigger frame, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the transceiving unit 1101 is configured to receive a first PPDU at a second RU determined based on the trigger frame, where the first PPDU includes LDPC extra symbol fragments, and the second RU is a part of the first RU.
  • the communication device 1100 can also be used to implement other embodiments performed by the AP in FIG. 1a to FIG. 10 and achieve corresponding beneficial effects.
  • the communication device 1100 can also be used to implement other embodiments performed by the AP in FIG. 1a to FIG. 10 and achieve corresponding beneficial effects.
  • the communication device 1100 is configured to execute the implementation process of the STA in the foregoing embodiments of the present application.
  • the communication device 1100 includes a sending unit 11011 and a receiving unit 11012;
  • the receiving unit 11012 is configured to receive first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the receiving unit 11012 is further configured to receive second indication information, where the second indication information is used to indicate whether the STA is allowed to send PPDUs based on a part of the RUs in the first RU, and the second indication information indicates that the STA is allowed When sending the PPDU based on a part of the RUs in the first RU, the PPDU includes LDPC extra symbol fragmentation;
  • the sending unit 11011 is configured to send a first PPDU based on the first indication information and the second indication information, wherein the second RU occupied by the first PPDU is a part of the first RU, and the first PPDU Include the LDPC extra symbol slice.
  • the communication device 1100 includes a transceiver unit 1101 and a processing unit 1102;
  • the transceiver unit 1101 is configured to receive a trigger frame, where the trigger frame includes first indication information and third indication information, wherein the first indication information is used to indicate the first RU of the STA, and the third indication information is used to indicate whether There are LDPC extra symbol slices;
  • the processing unit 1102 is configured to determine a second RU based on the trigger frame, where the second RU is a part of the first RU, and when the third indication information indicates that there is no LDPC extra symbol fragmentation, based on the When the second RU sends the first PPDU, the first PPDU is a PPDU that does not require LDPC extra symbol fragmentation.
  • the communication device 1100 includes a transceiver unit 1101 and a processing unit 1102;
  • the transceiving unit 1101 is configured to receive a trigger frame, where the trigger frame includes first indication information, where the first indication information is used to indicate the first RU of the STA;
  • the processing unit 1102 is configured to send a first PPDU based on the second RU determined based on the trigger frame, where the first PPDU includes LDPC extra symbol fragments, and the second RU is a part of the first RU.
  • the communication device 1100 can also be used to execute other embodiments executed by the STAs in FIG. 1a to FIG. repeat.
  • the AP and STA in the embodiment of the present application are introduced above, and the possible product forms of the AP and STA are introduced below. It should be understood that the following introduction is only an example, and the product forms of the AP and STA in the embodiment of the present application are not limited thereto.
  • the AP and STA described in the embodiment of the present application may be implemented by a general bus architecture.
  • FIG. 12 is a schematic structural diagram of a communication device 1200 provided by an embodiment of the present application.
  • the communication device 1200 may be an AP or a STA, or a chip therein.
  • FIG. 12 only shows the main components of a communication device 1200 , which includes at least an input and output port 1202 .
  • the input and output port 1202 may also be called a communication port, or a communication interface or the like.
  • the communication device 1200 further includes a processor 1201 ; in addition, the communication device 1200 may further include a memory 1203 .
  • the apparatus 1200 may further add a bus 1204, which is used to establish a connection between the input and output ports 1202 and/or the memory 1203 and the processor 1201.
  • the processor 1201 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs.
  • the memory 1203 is mainly used to store software programs and data.
  • the input and output port 1202 may include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the input and output port 1202 may be a touch screen, a display screen, a keyboard, etc., and is mainly used to receive data input by the user and output data to the user.
  • the processor 1201 can read the software program in the memory 1203, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 1201 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1201, and the processor 1201 converts the baseband signal into data and processes the data deal with.
  • the memory 1203 may be located in the processor 1201.
  • the processor 1201 may include a communication interface for implementing receiving and sending functions.
  • the communication interface may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit can be used for code/data reading and writing, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.
  • the processor 1201 may store instructions, the instructions may be computer programs, and the computer programs run on the processor 1201 to enable the communication device 1200 to execute the method described in any of the above embodiments.
  • the computer program may be solidified in the processor 1201, and in this case, the processor 1201 may be implemented by hardware.
  • the communication device 1200 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in any of the foregoing embodiments.
  • the processor and communication interface described in this application can be implemented in integrated circuit (integrated circuit, IC), analog IC, radio frequency integrated circuit (radio frequency integrated circuit, RFIC), mixed signal IC, application specific integrated circuit (application specific integrated circuit) , ASIC), printed circuit board (printed circuit board, PCB), electronic equipment, etc.
  • the processor and communication interface can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • a communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • a set of one or more ICs may also include storage components for storing data and computer programs;
  • ASIC such as modem (Modem);
  • the AP and STA described in the embodiment of this application may be implemented by a general-purpose processor.
  • the embodiment of the present application also provides a computer-readable storage medium, where computer program code is stored, and when the above-mentioned processor executes the computer program code, the electronic device executes the method in any one of the above-mentioned embodiments.
  • An embodiment of the present application further provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any one of the preceding embodiments.
  • the embodiment of the present application also provides a communication device, which can exist in the product form of a chip.
  • the structure of the device includes a processor and an interface circuit.
  • the processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method in any of the examples.
  • the embodiment of the present application also provides a wireless communication system, including an AP and an STA, and the AP and the STA can execute the method in any one of the foregoing embodiments.
  • the steps of the methods or algorithms described in connection with the disclosure of this application can be implemented in the form of hardware, or can be implemented in the form of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), electrically erasable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请实施例提供了一种通信方法及通信装置，用于提升WLAN通信效率。在该方法中，AP发送第一指示信息，该第一指示信息用于指示STA的第一RU；该AP发送第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；该AP接收第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。

Description

一种通信方法及通信装置
本申请要求于2021年07月12日提交中国国家知识产权局，申请号为202110786868.9，发明名称为“一种通信方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线局域网(wireless local area networks，WLAN)技术领域，尤其涉及一种通信方法及通信装置。
背景技术
WLAN通信技术发展至今已历经多代，按照通信标准的发布时间先后顺序，包括802.11a/b/g、802.11n、802.11ac、802.11ax以及现在正在讨论中的802.11be(也可以称为极高吞吐率(extremely high throughput，EHT)标准)等。其中，在WLAN通信中，站点(station，STA)的上行资源主要是由接入点(access point，AP)分配，并且，STA的待发送数据需要经过编码才可以在AP指定的上行资源上进行传输。
在WLAN的上行资源分配过程中，不同于EHT之前的上行资源分配方式中每一个STA只允许被分配一个资源单元(resource unit，RU)；在EHT的上行资源分配方式中，每一个STA可以被分配一个RU或多资源单元(multiple RU，MRU)。并且，EHT后续可能还允许STA基于RU或MRU中的部分RU(也可以称为适应性RU(adapted/adaptive RU))进行传输。
在WLAN的编码过程中，以802.11n为例，STA待发送的数据比特(data bits)需要经过低密度奇偶校验(low density parity check，LDPC)编码，得到编码后的数据；其中，编码后的数据至少包括该数据比特以及校验比特(parity bits)，并且还可能对该校验比特进行打孔(puncture)。当对该校验比特进行打孔时，为了确保存在足够多数量的校验比特以支持AP进行校验，在打孔过程中被打掉的校验比特数量较多时，802.11n中规定可以基于新的传输符号承载本应被打掉的校验比特。由于EHT中每一个符号所承载的子载波数量较多，使得在EHT中改为基于符号分片承载被打掉的校验比特，以节省开销；并且，AP还可能在分配上行资源的过程中，AP为STA指定该STA是否基于符号分片进行传输。
然而，上述AP指定该STA是否基于符号分片进行传输的实现方式中，AP是基于为该STA所分配的RU或MRU所指定的。而在STA基于适应性RU进行传输时，由于基于适应性RU传输的PPDU所承载的比特数不同于基于完整的RU或MRU传输的PPDU所承载的比特数，容易导致STA基于该指定的实现方式并不适配于该STA在适应性RU上的传输，造成通信效率下降。
发明内容
本申请实施例提供了一种通信方法及通信装置，用于提升WLAN通信效率。
本申请实施例第一方面提供了一种通信方法，应用于WLAN通信，该方法由AP执行， 或者，该方法由AP中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，AP发送第一指示信息，该第一指示信息用于指示STA的第一RU；该AP发送第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送物理层协议数据单元(physical protocol data unit，PPDU)，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；该AP接收第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
基于上述技术方案，AP所发送的第二指示信息用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU，并且，在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。也就是说，STA在基于第一指示信息所分配的第一RU中的一部分RU发送PPDU时，该PPDU为基于LDPC额外符号分片所配置，使得STA基于LDPC额外符号分片在适应性RU上进行传输。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
可选的，第二指示信息可以表示为适应性RU允许字段，或者，第二指示信息可以表示为适应性RU允许子字段，或者，第二指示信息可以表示为适应性TB PPDU允许字段，或者，第二指示信息可以表示为适应性TB PPDU允许子字段。
需要说明的是，“在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片”，可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送PPDU时，且该STA基于该第一RU中的一部分RU所发送的PPDU时，该PPDU包括LDPC额外符号分片；也可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送PPDU且该PPDU包括LDPC额外符号分片；也可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU且第二指示信息还指示该PPDU包括LDPC额外符号分片。
在第一方面的一种可能的实现方式中，在该AP接收该第一PPDU之后，该方法还包括：首先，该AP根据该第一PPDU的大小确定该第一PPDU的配置方式，该配置方式包括基于存在LDPC额外符号分片的方式配置该第一PPDU；此后，该AP根据该配置方式解析该PPDU。
可选的，AP根据该配置方式解析该PPDU，也可以称为AP根据该配置方式解码该PPDU。
基于上述技术方案，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU的大小确定该第一PPDU的配置方式为该基于存在LDPC额外符号分片的方式配置该第一PPDU，使得AP基于该配置方式对该第一PPDU进行解析。避免AP根据未基于存在LDPC额外符号分片的配置方式解析该第一PPDU，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
本申请实施例第二方面提供了一种通信方法，应用于WLAN通信，该方法由STA执行，或者，该方法由STA中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，STA接收第一指示信息，该第一指示信息用于指示该STA的第一RU；该STA接收第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU 发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；该STA基于该第一指示信息和该第二指示信息发送第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
基于上述技术方案，STA所接收的第二指示信息用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU，并且，在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。也就是说，STA在基于第一指示信息所分配的第一RU中的一部分RU发送PPDU时，该PPDU为基于LDPC额外符号分片所配置，使得STA基于LDPC额外符号分片在适应性RU上进行传输。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
在第一方面或第二方面的一种可能的实现方式中，该第一指示信息承载于触发帧，该触发帧还包括第三指示信息，该第三指示信息用于指示存在LDPC额外符号分片。
基于上述技术方案，用于为STA指示该STA的第一RU的第一指示信息承载于触发帧，并且，该触发帧还包括用于指示存在LDPC额外符号分片的第三指示信息，使得通过同一触发帧实现多个指示信息的承载，可以节省开销，进一步提升通信效率。
可选的，该第三指示信息包括LDPC额外符号分片子字段(LDPC Extra Symbol Segment subfield)，且在该LDPC额外符号分片子字段的取值为1时，指示存在LDPC额外符号分片。
在第一方面或第二方面的一种可能的实现方式中，该触发帧承载于第二PPDU，且该第二指示信息承载于该第二PPDU。
基于上述技术方案，包含有第一指示信息和第三指示信息的触发帧承载于第二PPDU，且用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU的第二指示信息也承载于该第二PPDU，使得通过同一个PPDU实现多个指示信息的承载，可以节省开销，进一步提升通信效率。
可选的，该第二指示信息承载于触发帧。
可选的，该第二PPDU包括不同于该触发帧的第一信息，且第二指示信息承载于该第一信息中；其中，该第一信息可以为前导码(preamble)中的信息，控制帧，管理帧等，此处不做限定。
本申请实施例第三方面提供了一种通信方法，应用于WLAN通信，该方法由STA执行，或者，该方法由STA中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，STA接收触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示该STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；该STA基于该触发帧确定第二RU，其中，该第二RU为该第一RU中的一部分，且该第三指示信息指示不存在该LDPC额外符号分片时，基于该第二RU发送第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。
基于上述技术方案，STA所接收的触发帧包括用于指示该STA的第一RU的第一指示信息和用于指示是否存在LDPC额外符号分片的第三指示信息；STA基于该触发帧确定第一RU 中的一部分传输第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。也就是说，STA在基于所分配的第一RU选择适应性RU时，该STA选择不需要LDPC额外符号分片的PPDU对应的适应性RU，并基于该适应性RU传输第一PPDU。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，使得STA基于适应性RU传输PPDU时适配于AP的指定，以提升WLAN通信效率。
本申请实施例第四方面提供了一种通信方法，应用于WLAN通信，该方法由AP执行，或者，该方法由AP中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，AP生成触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；该AP发送该触发帧。
基于上述技术方案，AP所生成并发送的触发帧包括用于指示该STA的第一RU的第一指示信息和用于指示是否存在LDPC额外符号分片的第三指示信息；STA基于该触发帧确定第一RU中的一部分传输第一PPDU，且该第三指示信息指示不存在该LDPC额外符号分片时，该第一PPDU为不需要LDPC额外符号分片的PPDU。也就是说，STA在基于所分配的第一RU选择适应性RU时，该STA选择不需要LDPC额外符号分片的PPDU对应的适应性RU，并基于该适应性RU传输第一PPDU。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，使得STA基于适应性RU传输PPDU时适配于AP的指定，以提升WLAN通信效率。
本申请实施例第五方面提供了一种通信方法，应用于WLAN通信，该方法由STA执行，或者，该方法由STA中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，STA接收触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示该STA的第一RU；该STA基于该触发帧确定的第二RU发送第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
基于上述技术方案，STA所接收的触发帧包括用于指示该STA的第一RU的第一指示信息；STA基于该触发帧确定的第二RU传输第一PPDU时，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。也就是说，STA在基于所分配的第一RU选择第二RU作为适应性RU时，该STA在该适应性RU所传输的第一PPDU包括LDPC额外符号分片。从而，避免在AP指定STA是否基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而导致通信效率较低的情况，使得STA基于适应性RU传输的PPDU包括LDPC额外符号分片，以提升WLAN通信效率。
本申请实施例第六方面提供了一种通信方法，应用于WLAN通信，该方法由AP执行，或者，该方法由AP中的部分组件(例如处理器、芯片、或芯片系统等)执行。在该方法中，AP生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示该STA的第一RU；该AP基于该触发帧确定的第二RU接收第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
基于上述技术方案，AP所生成并发送的触发帧包括用于指示该STA的第一RU的第一 指示信息；此后，该AP基于该触发帧确定的第二RU接收第一PPDU，即STA基于该触发帧确定的第二RU传输第一PPDU时，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。也就是说，STA在基于所分配的第一RU选择第二RU作为适应性RU时，该STA在该适应性RU所传输第一PPDU包括LDPC额外符号分片。从而，避免在AP指定STA是否基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而导致通信效率较低的情况，使得STA基于适应性RU传输的PPDU包括LDPC额外符号分片，以提升WLAN通信效率。
在第一方面至第六方面中任一方面的一种可能的实现方式中，该第一PPDU包括第四指示信息，该第四指示信息用于指示该第一PPDU是否包括该LDPC额外符号分片。
基于上述技术方案，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU中的第四指示信息以确定该第一PPDU的配置方式是否包括该LDPC额外符号分片，使得AP后续基于该第四指示信息对该第一PPDU进行解析，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
在第一方面至第六方面中任一方面的一种可能的实现方式中，该LDPC额外符号分片包括后-前向纠错填充(post-forward error correction padding，post-FEC padding)类型的额外符号分片。
基于上述技术方案，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
在第一方面至第六方面中任一方面的一种可能的实现方式中，该第一RU为RU或MRU。
基于上述技术方案，AP通过第一指示信息所指示的第一RU可以为RU，也可以是MRU，使得方案适配于不同的RU分配场景。
本申请实施例第七方面提供了一种通信装置，包括发送单元和接收单元；
该发送单元，用于发送第一指示信息，该第一指示信息用于指示STA的第一RU；
该发送单元，还用于发送第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；
该接收单元，用于接收第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
基于上述技术方案，发送单元所发送的第二指示信息用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU，并且，在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。也就是说，STA在基于第一指示信息所分配的第一RU中的一部分RU发送PPDU时，该PPDU为基于LDPC额外符号分片所配置，使得STA基于LDPC额外符号分片在适应性RU上进行传输。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指 定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
在第七方面的一种可能的实现方式中，该装置还包括处理单元，该处理单元具体用于：
在该接收单元接收该第一PPDU之后，根据该第一PPDU的大小确定该第一PPDU的配置方式，该配置方式包括基于存在LDPC额外符号分片的方式配置该第一PPDU；
根据该配置方式解析该PPDU。
本申请实施例第八方面提供了一种通信装置，其特征在于，包括发送单元和接收单元；
该接收单元，用于接收第一指示信息，该第一指示信息用于指示STA的第一RU；
该接收单元，还用于接收第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；
该发送单元，用于基于该第一指示信息和该第二指示信息发送第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
基于上述技术方案，接收单元所接收的第二指示信息用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU，并且，在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。也就是说，该发送单元在基于第一指示信息所分配的第一RU中的一部分RU发送PPDU时，该PPDU为基于LDPC额外符号分片所配置，使得STA基于LDPC额外符号分片在适应性RU上进行传输。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
在第七方面或第八方面的一种可能的实现方式中，该第一指示信息承载于触发帧，该触发帧还包括第三指示信息，该第三指示信息用于指示存在LDPC额外符号分片。
在第七方面或第八方面的一种可能的实现方式中，该触发帧承载于第二PPDU，且该第二指示信息承载于该第二PPDU。
本申请实施例第九方面提供了一种通信装置，包括收发单元和处理单元；
该收发单元，用于接收触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；
该处理单元，用于基于该触发帧确定第二RU，其中，该第二RU为该第一RU中的一部分，且该第三指示信息指示不存在该LDPC额外符号分片时，基于该第二RU发送第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。
基于上述技术方案，收发单元所接收的触发帧包括用于指示该STA的第一RU的第一指示信息和用于指示是否存在LDPC额外符号分片的第三指示信息；此后，处理单元基于该触发帧确定第一RU中的一部分传输第一PPDU，且该第三指示信息指示不存在该LDPC额外符号分片时，该第一PPDU为不需要LDPC额外符号分片的PPDU。也就是说，处理单元在基于所分配的第一RU选择适应性RU时，该处理单元选择不需要LDPC额外符号分片的PPDU对应的适应性RU，并基于该适应性RU传输第一PPDU。从而，避免在AP指定STA不基于符号 分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，使得STA基于适应性RU传输PPDU时适配于AP的指定，以提升WLAN通信效率。
本申请实施例第十方面提供了一种通信装置，其特征在于，包括收发单元和处理单元；
该处理单元，用于生成触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；
该收发单元，用于发送该触发帧。
基于上述技术方案，处理单元所生成并发送的触发帧包括用于指示该STA的第一RU的第一指示信息和用于指示是否存在LDPC额外符号分片的第三指示信息；此后，STA基于该触发帧确定第一RU中的一部分传输第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。也就是说，STA在基于所分配的第一RU选择适应性RU时，该STA选择不需要LDPC额外符号分片的PPDU对应的适应性RU，并基于该适应性RU传输第一PPDU。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，使得STA基于适应性RU传输PPDU时适配于AP的指定，以提升WLAN通信效率。
本申请实施例第十一方面提供了一种通信装置，包括收发单元和处理单元；
该收发单元，用于接收触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示STA的第一RU；
该处理单元，用于基于该触发帧确定的第二RU发送第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
基于上述技术方案，收发单元所接收的触发帧包括用于指示该STA的第一RU的第一指示信息；此后，处理单元基于该触发帧确定的第二RU传输第一PPDU时，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。也就是说，STA在基于所分配的第一RU选择第二RU作为适应性RU时，该STA在该适应性RU所传输第一PPDU包括LDPC额外符号分片。从而，避免在AP指定STA是否基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而导致通信效率较低的情况，使得STA基于适应性RU传输的PPDU包括LDPC额外符号分片，以提升WLAN通信效率。
本申请实施例第十二方面提供了一种通信装置，包括收发单元和处理单元；
该处理单元，用于生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示STA的第一RU；
该收发单元，用于基于该触发帧确定的第二RU接收第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
基于上述技术方案，处理单元所生成并发送的触发帧包括用于指示该STA的第一RU的第一指示信息；此后，收发单元基于该触发帧确定的第二RU接收第一PPDU，即STA基于该触发帧确定的第二RU传输第一PPDU时，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。也就是说，STA在基于所分配的第一RU选择第二RU作为适应性 RU时，该STA在该适应性RU所传输第一PPDU包括LDPC额外符号分片。从而，避免在AP指定STA是否基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而导致通信效率较低的情况，使得STA基于适应性RU传输的PPDU包括LDPC额外符号分片，以提升WLAN通信效率。
在第七方面至第十二方面中任一方面的一种可能的实现方式中，该第一PPDU包括第四指示信息，该第四指示信息用于指示该第一PPDU是否包括该LDPC额外符号分片。
在第七方面至第十二方面中任一方面的一种可能的实现方式中，该LDPC额外符号分片包括后-前向纠错填充post-FEC padding类型的额外符号分片。
在第七方面至第十二方面中任一方面的一种可能的实现方式中，该第一RU为RU或MRU。
需要说明的是，第七方面至第十二方面所提供的通信装置还可以执行如前述第一方面至第六方面及其任一实施例中的通信方法，并实现相应的有益效果。
本申请实施例第十三方面提供了一种通信装置，包括至少一个处理器，该至少一个处理器与存储器耦合；
该存储器用于存储程序或指令；
该至少一个处理器用于执行该程序或指令，以使该装置实现前述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第三方面或第三方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第四方面或第四方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第五方面或第五方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第六方面或第六方面任意一种可能的实现方式所述的方法。
本申请实施例第十四方面提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第三方面或第三方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第四方面或第四方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第五方面或第五方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第六方面或第六方面任意一种可能的实现方式所述的方法。
本申请实施例第十五方面提供一种存储一个或多个计算机的计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能实现方式的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第三方面或第三方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第四方面或第四方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第五方面或第五方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第六方面或第六方面任意一种可能的实现方式所述的方法。
本申请实施例第十六方面提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述第一方面或第一方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第二方面或第二方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第三方面或第三方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第四方面或第四方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第五方面或第五方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第六方面或第六方面任意一种可能的实现方式中所涉及的功能。
在一种可能的设计中，该芯片系统还可以包括存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。可选的，该芯片系统还包括接口电路，该接口电路为该至少一个处理器提供程序指令和/或数据。
本申请实施例第十七方面提供了一种通信系统，该通信系统包括上述第七方面的通信装置和第八方面的通信装置，和/或，该通信系统包括上述第九方面的通信装置和第十方面的通信装置，和/或，该通信系统包括上述第十一方面的通信装置和第十二方面的通信装置，和/或，该通信系统包括上述第十三方面的通信装置。
其中，第七方面至第十七方面中任一种设计方式所带来的技术效果可参见上述第一方面至第六方面中不同实现方式所带来的技术效果，在此不再赘述。
从以上技术方案可以看出，通过前述多个方面提供的通信方法及通信装置，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
附图说明
图1a为本申请所应用的通信系统的一个示意图；
图1b为本申请所应用的AP的一个示意图；
图1c为本申请所应用的STA的一个示意图；
图2a为本申请所涉及的触发帧的一个示意图；
图2b为本申请所涉及的触发帧的另一个示意图；
图2c为本申请所涉及的HE TB PPDU的另一个示意图；
图2d为本申请所涉及的触发帧的另一个示意图；
图3a为本申请所涉及的基于触发帧配置RU的一个示意图；
图3b为本申请所涉及的基于触发帧配置RU的另一个示意图；
图4为本申请所涉及的LDPC编码过程的一个示意图；
图5为本申请所涉及的LDPC符号分片的一个示意图；
图6为本申请提供的一种通信方法的一个示意图；
图7为本申请提供的一种通信方法的另一个示意图；
图8为本申请提供的一种通信方法的另一个示意图；
图9为本申请提供的一种通信方法的另一个示意图；
图10为本申请提供的一种通信方法的另一个示意图；
图11为本申请提供的一种通信装置的一个示意图；
图12为本申请提供的一种通信装置的另一个示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
在本申请的描述中，除非另有说明，“/”表示“或”的意思，例如，A/B可以表示A或B。本文中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。此外，“至少一个”是指一个或多个，“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c；a和b；a和c；b和c；或a和b和c。其中a，b，c可以是单个，也可以是多个。
在本申请的描述中，“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”、“举例来说”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”、“举例来说”或者“例如”等词旨在以具体方式呈现相关概念。
此外，本申请任一实施例所涉及的字段的取值为“0”或者取值为“1”仅仅为示意，该取值还可以互换，例如，字段的取值为“0”所指示的信息还可以指示字段的取值为“1”所指示的信息，或者，还可以通过其他的字段名称或者是其他的取值实现，此处不做限定。
应理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下装置会做出相应的处理，并非是限定时间，且也不要求装置实现时一定要有判断的动作，也不意味着存在其它限定。
本申请中对于使用单数表示的元素旨在用于表示“一个或多个”或“至少一个”，而并非表示“一个且仅一个”，除非有特别说明。
应理解，在本申请各实施例中，“与A对应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
为便于理解本申请实施例提供的方法，下面将对本申请实施例提供的方法的系统架构进行说明。可理解的，本申请实施例描述的系统架构是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定。
本申请提供的技术方案可以应用于各种通信系统，例如采用802.11标准的系统。示例性的，802.11标准包括但不限于：802.11be标准、或者更下一代的802.11标准。本申请的技术方案适用的场景包括AP与一个或多个STA之间的通信，或AP与AP之间的通信，或STA与 STA之间的通信。在本申请实施例中，术语“通信”还可以描述为“数据传输”、“信息传输”或“传输”。
请参见图1a，图1a是本申请实施例提供的无线通信系统的架构示意图。
如图1a所示，该无线通信系统可以包括一个或多个AP(如图1a中的AP101，AP102)，和一个或多个STA(如图1a中的STA201，STA202，STA203)。其中，AP和STA均支持WLAN通信协议，该通信协议可以包括802.11be(或称为Wi-Fi 7，EHT协议)，还可以包括802.11ax，802.11ac等协议。当然，随着通信技术的不断演进和发展，该通信协议还可以包括802.11be的下一代协议等，此处不做限定。以WLAN为例，实现本申请方法的装置可以是WLAN中的AP或STA，或者是，安装在AP或STA中的处理器、芯片或处理系统。
可选的，本申请涉及的接入点(如图1a的AP101或AP102)是一种具有无线通信功能的装置，支持采用WLAN协议进行通信，具有与WLAN网络中其他设备(比如站点或其他接入点)通信的功能，当然，还可以具有与其他设备通信的功能。在WLAN系统中，接入点可以称为接入点站点(AP STA)。该具有无线通信功能的装置可以为一个整机的设备，还可以是安装在整机设备中的芯片或处理系统等，安装这些芯片或处理系统的设备可以在芯片或处理系统的控制下，实现本申请实施例的方法和功能。本申请实施例中的AP是为STA提供服务的装置，可以支持802.11系列协议。例如，AP可以为通信服务器、路由器、交换机、网桥等通信实体；AP可以包括各种形式的宏基站，微基站，中继站等，当然AP还可以为这些各种形式的设备中的芯片和处理系统，从而实现本申请实施例的方法和功能。
可选的，本申请涉及的站点(如图1a的STA201、或STA202、或STA203)是一种具有无线通信功能的装置，支持采用WLAN协议进行通信，具有与WLAN网络中的其他站点或接入点通信的能力。在WLAN系统中，站点可以称为非接入点站点(non-access point station,non-AP STA)。例如，STA是允许用户与AP通信进而与WLAN通信的任何用户通信设备，该具有无线通信功能的装置可以为一个整机的设备，还可以是安装在整机设备中的芯片或处理系统等，安装这些芯片或处理系统的设备可以在芯片或处理系统的控制下，实现本申请实施例的方法和功能。例如，STA可以为平板电脑、桌面型、膝上型、笔记本电脑、超级移动个人计算机(Ultra-mobile personal computer，UMPC)、手持计算机、上网本、个人数字助理(personal digital assistant，PDA)、手机等可以联网的用户设备，或物联网中的物联网节点，或车联网中的车载通信装置，或娱乐设备，游戏设备或系统，全球定位系统设备等，STA还可以为上述这些终端中的芯片和处理系统。
WLAN系统可以提供高速率低时延的传输，随着WLAN应用场景的不断演进，WLAN系统将会应用于更多场景或产业中，比如，应用于物联网产业，应用于车联网产业或应用于银行业，应用于企业办公，体育场馆展馆，音乐厅，酒店客房，宿舍，病房，教室，商超，广场，街道，生成车间和仓储等。当然，支持WLAN通信的设备(比如接入点或站点)可以是智慧城市中的传感器节点(比如，智能水表，智能电表，智能空气检测节点)，智慧家居中的智能设备(比如智能摄像头，投影仪，显示屏，电视机，音响，电冰箱，洗衣机等)，物联网中的节点，娱乐终端(比如增强现实(augmented reality，AR)，虚拟现实(virtual reality，VR)等可穿戴设备)，智能办公中的智能设备(比如，打印机，投影仪，扩音器， 音响等)，车联网中的车联网设备，日常生活场景中的基础设施(比如自动售货机，商超的自助导航台，自助收银设备，自助点餐机等)，以及大型体育以及音乐场馆的设备等。本申请实施例中对于STA和AP的具体形式不做限制，在此仅是示例性说明。
应理解，802.11标准关注物理(physical layer，PHY)层和媒体接入控制(medium access control，MAC)层部分。一个示例中，参见图1b，图1b是本申请实施例提供的接入点AP的结构示意图。其中，AP可以是多天线/多射频的，也可以是单天线/单射频的，该天线/射频用于发送/接收数据分组(本文中数据分组也可称为物理层协议数据单元，即PPDU)。一种实现中，AP的天线或射频部分可以与AP的主体部分分离，呈拉远布局的结构。图1b中，AP可以包括物理层处理电路和媒体接入控制处理电路，物理层处理电路可以用于处理物理层信号，MAC层处理电路可以用于处理MAC层信号。另一个示例中，参见图1c，图1c是本申请实施例提供的站点STA的结构示意图。图1c示出了单个天线/射频的STA结构示意图，实际场景中，STA也可以是多天线/多射频的，并且可以是两个以上天线的设备，该天线/射频用于发送/接收数据分组。一种实现中，STA的天线或射频部分可以与STA的主体部分分离，呈拉远布局的结构。图1c中，STA可以包括PHY处理电路和MAC处理电路，物理层处理电路可以用于处理物理层信号，MAC层处理电路可以用于处理MAC层信号。
上述内容简要阐述了本申请实施例的系统架构，为更好地理解本申请实施例的技术方案，下面将介绍与本申请实施例相关的几个内容。
一.AP为STA分配上行资源。
WLAN到目前为止已历经多代，如802.11a/b/g、802.11n、802.11ac、802.11ax和如今正在讨论的802.11be等。其中802.11n标准可以称为高吞吐率(high throughput,HT)，802.11ac标准可以称为非常高吞吐率(very high throughput，VHT)，802.11ax(Wi-Fi 6)可以称为高效(high efficient，HE)，802.11be(Wi-Fi 7)可以称为极高吞吐率(extremely high throughput，EHT)，而对于HT之前的标准，如802.11a/b/g等可以统称为非高吞吐率(Non-HT)。
对于上行数据传输，STA可以通过信道竞争获得发送权之后再进行上行数据传输，如基于增强的分布式信道接入(enhanced distributed channel access，EDCA)。在802.11ax，又引入了基于触发帧的上行传输方法，其流程包括如下步骤。
步骤一：AP首先发送触发帧(如图2a中的触发帧(Tigger frame))，在触发帧中包含一个或多个站点(STA)发送基于触发的PPDU(trigger based physical layer protocol data unit，TB PPDU)需要的相关信息，如资源单元的分配等信息。
如图2a所示，整个触发帧包含公共信息(Common Info)字段和用户信息列表(User Info List)字段。其中，公共信息字段包含所有STA都需要读取的公共信息，而用户信息列表字段由一个或多个用户信息字段构成，每个用户信息字段包含每个STA分别需要读取的信息。在用户信息字段中，关联标识(Association Identification 12，AID12)表示某一个STA的关联标识，而资源单元分配子字段(RU Allocation)用来指示这个STA(AID12所指示的STA)所分配到的具体的资源单元(Resource Unit，RU)位置。公共信息字段和用户信息字段的具体内容如图2b所示。
步骤二：STA接收到触发帧以后，从中解析出与自己的AID相匹配的用户信息字段，然后在该用户信息字段中的资源单元分配子字段所指示的RU上发送高效基于触发的PPDU(high efficient trigger based physical layer protocol data unit，HE TB PPDU)(为四种HE PPDU中的一种)。
示例性的，该HE TB PPDU所包含的各个字段如图2c所示，各个字段的名称和功能如下：
表1 HE TB PPDU中字段含义
Figure PCTCN2022104601-appb-000001
在表1中，当带宽不大于20Mhz时，前四项L-STF到HE-SIG-A是以20兆赫兹(MHz)为单位进行传输；当带宽大于20Mhz时，前四项L-STF到HE-SIG-A是以20MHz为单位进行复制传输。
此外，表1中从HE-STF到Data的后三项，整个带宽可以被划分为1个或多个资源单元，值得注意的是，在802.11ax标准中，一个STA只能允许被分配一个RU。下一代802.11be标准允许为一个STA分配多个RU(multi-RU,MRU)。
步骤三：AP接收到一个或多个站点发送的上行子PPDU组成的上行多用户PPDU后，还可以回复确认帧。
其中，在802.11be中，同样存在触发帧触发TB PPDU这一流程，该流程与11ax类似，只不过增加或拓展了一些其他信令指示，如320MHz中的资源单元分配等等。本领域技术人员能够理解增加或扩展的内容，在此不过多描述。11be的触发帧结构如图2d所示。
目前，在基于触发的传输流程中，有人提出了适应性RU的概念，即被触发的站点可以根据所侦测的信道忙闲状况适应性地调整由触发帧分配的RU或MRU的大小，选择小于触发帧分配的RU或MRU进行发送，避开检测为忙的信道，下面将详细介绍。
二.上行资源中的适应性RU。
在上述基于触发帧的上行调度传输方法中，因为AP发送的触发帧中包括需要载波侦听(carrier sensing required)字段，用于指示站点需要进行载波侦听；所以，STA在进行 TB PPDU传输时，会在该STA被分配的MRU/RU所在的一个或多个20MHz子信道上进行载波侦听，检测侦听到的能量是否超过一个预定门限。如果STA在某个20MHz子信道上检测侦听到的能量超过该预定门限，则说明该20MHz子信道为忙；如果STA在某个20MHz子信道上检测侦听到的能量未超过该预定门限，则说明该20MHz子信道为闲。802.11ax标准规定若分配给STA的RU所在的频率范围中存在至少一个20MHz子信道为忙，则不可以传输HE TB PPDU，以防止对其他传输造成干扰。
下面将通过图3a所示实现示例进行描述。
示例性的，如图3a所示，图3a是进行载波侦听的HE TB PPDU传输示意图。对于STA1，其被分配的RU是484-tone RU(其中，“tone”指的是子载波)，484-tone RU对应的频率范围为40MHz，包含2个20MHz子信道。STA1在传输之前进行载波侦听，如果发现其中一个20MHz子信道忙，另一个20MHz子信道闲，则STA1无法在被分配的484-tone RU上进行传输。对于STA4，其被分配的RU是242-tone RU，242-tone RU对应的频率范围为20MHz，包含1个20MHz子信道。STA4在传输之前进行载波侦听，如果发现这个20MHz子信道闲，则STA4可以在被分配的242-tone RU上进行传输HE TB PPDU。应理解，484-tone RU表示一个包含484个子载波的资源单元，同理，242-tone RU表示一个包含242个子载波的资源单元。下文中涉及到的Z-tone-RU表示类似的含义，即表示一个包含Z(Z是正整数)个子载波的资源单元，下文不再说明。
在802.11be基于触发帧的上行调度传输方法中，有人提出了适应性RU的概念，即被触发的站点可以根据侦听检测到的信道忙闲状态，适应性地从触发帧分配给站点的RU或MRU中选择部分RU(这部分RU即为适应性RU)来传输TB PPDU，从而避开检测为忙的信道。
下面将通过图3b所示实现示例进行描述。
示例性的，如图3b所示，图3b是采用适应性RU传输TB PPDU的示意图。对于STA1，其被分配的RU是484-tone RU，484-tone RU对应的频率范围为40MHz，包含2个20MHz子信道。STA1在传输之前进行载波侦听，如果发现其中一个20MHz子信道忙，另一个20MHz子信道闲，则STA1可以在空闲的20MHz子信道(或242-tone RU)上传输TB PPDU。其中，这个空闲的242-tone RU可称为适应性RU。对于STA4，其被分配的RU是242-tone RU，242-tone RU对应的频率范围为20MHz，包含1个20MHz子信道。STA4在传输之前进行载波侦听，如果发现这个20MHz子信道闲，则STA4可以在被分配的242-tone RU上进行传输TB PPDU。
其中，当STA被分配的MRU/RU中存在繁忙子信道(本文中“繁忙子信道”是指子信道的状态为繁忙状态)时，STA如果满足以下两个条件，则仍然可以进行传输：
(1)被分配的MRU/RU中包括至少一个空闲子信道(本文中“空闲子信道”是指子信道的状态为空闲状态)；
(2)该至少一个空闲子信道对应的资源单元中存在符合规定的可用资源单元(不是所有资源单元样式都可被支持发送)。
其中，在条件(2)中，资源单元样式可以指示RU的子载波样式，例如26-tone RU，52-tone RU，106-tone RU，242-tone RU，484-tone RU，996-tone RU，2*996-tone RU可以视为不同资源单元样式的RU。此外，符合规定的可用资源单元(即适应性RU)可以是 802.11be当前支持的MRU/RU格式，具体可参考802.11be标准当前的描述。因本申请不涉及具体的适应性RU格式，故这里不展开说明。
应理解，为方便描述，本申请以适应性RU来表示尺寸变化的资源单元(这里指站点实际传输的资源单元与站点被分配的MRU/RU的尺寸不相同)，该称呼同时涵盖适应性MRU。后面不再区分。
可见，针对802.11be中的MRU/RU提出一种适应性RU，即站点在被分配的部分空闲子信道上进行传输，可以更高效地利用频谱资源。
三.HT中的LDPC
目前802.11的数据字段支持二进制卷积码(binary convolutional code，BCC)编码方式和LDPC编码方式，下面主要介绍HT(以802.11n为例)中的LDPC的编码过程。在HT中，LDPC编码过程主要分为5步，包括如下步骤。
步骤A：计算可用比特数。
STA中待发送的数据字段的可用比特数可以用下式求得：
N pld＝length×8+16  (1)；
Figure PCTCN2022104601-appb-000002
在上述式(1)和式(2)中，N pld指示的是编码前的物理层服务数据单元(physical layer service data unit，PSDU)和服务字段中的比特数目，N pld中的pld表示有效载荷“payload”，它和长度值(length)的关系如上式所述；length是HE-SIG字段中的HT Length field的值。
其中，在式(2)中，N avbits是初始的可用的编码后的总比特数目(avbits表示可用比特(available bits)，之所以这里叫初始，请见后面有关步骤D中更新的描述)；m STBC的含义为：当使用空时块编码(Space-Time Block Coding，STBC)时是2，否则是1；R为码率，表示信息位占编码后总比特数目的百分比。
其中，在式(2)中，
Figure PCTCN2022104601-appb-000003
表示向上取整，根据向上取整的部分及m STBC计算得到总共的符号数目，再根据每个符号支持的编码后的比特数(number of coded bits per symbol，N CBPS)得到N avbits。其中，N CBPS×R表示信息位的比特数。
步骤B：基于步骤A中的N avbits得到码字数目N CW和码字长度L LDPC。
在步骤A中所获得的N avbits，通过查找下表2所示的PPDU编码参数表(PPDU encoding parameters)，可以获得N avbits对应的码字数目N CW和码字长度L LDPC。
表2
Figure PCTCN2022104601-appb-000004
上述表2中，第一列数据表示的取值范围(Range of Navbits)，单位为比特数(bits)；第二列数据表示LDPC码字数目(Number of LDPC codewords)，记为N CW；第三列数据表示LDPC码字长度L LDPC(LDPC codeword length)，记为L LDPC。
步骤C：基于步骤A和步骤B计算缩短比特的数目。
在步骤B获得了N avbits对应的对应的码字数目N CW和码字长度L LDPC后，需要计算缩短的比特数目，这部分比特的产生是因为信息位无法携带那么多的比特(信息位承载的比特只能是N pld)，因此这部分比特虽然算作是信息位，但并非实际的信息位，在编码过程中置0，在实际过程中不传输，也称作缩短比特。缩短比特的含义也可以见下式：
N shrt＝max(0,(N CW×L LDPC×R)-N pld)  (3)；
在式(3)中，N shrt表示缩短比特，N CW×L LDPC×R表示信息位的总比特数目(或称为编码前的比特数，或称为未加校验位的比特数)，N pld表示编码前可支持的总比特数，max(A,B)表示取A和B中的最大值。
步骤D：计算打孔比特的数目。
在HT的数据字段的LDPC编码过程中，还需要对超出的校验位进行打孔(puncture)，如下式所示：
N punc＝max(0,(N CW×L LDPC)-N avbits-N shrt)  (4)；
在式(4)中，所表示的含义为：需要打孔的比特数目＝编码后的总比特数-可用总比特数-缩短比特数，或，需要打孔的比特数目＝0；max(A,B)表示A和B中的最大值。
其中，(编码后的总比特数-可用总比特数-缩短比特数)也可以理解为是(编码后的总比特数-缩短比特数-可用总比特数)，表示了额外多出的校验位的数目，也就是需要被打掉的数目。
应注意，存在需要被打掉的数目过多的情况，在这种情况下会影响LDPC解码的性能，因此HT中采用了如下的方式对打掉数目过多时的相关参数进行更新，如下所述：
步骤D的更新过程如下。
打孔数目是否过多可以由下面两个条件判断：
条件一：
Figure PCTCN2022104601-appb-000005
条件二：
(N punc>0.3×N CW×L LDPC×(1-R))；
上述第一个条件表示如果打掉的检验位比特数超过校验位的总比特数的10％，且，打掉的校验位超过缩短比特一定比例；
上述第二个条件表示如果打掉的检验位比特数超过校验位的总比特数的30％。
可选的，步骤D中条件一和条件二的实现仅仅为示例，参数“0.1”也可以使用其他取值(例如0.11、0.15等)替换，参数“30％”也可以使用其他取值(例如0.35、0.4等)替换，该条件主要用于判断是否存在打掉的校验位数据较多而影响LDPC解码的性能。
上述任一条件满足，则表示被打掉的比特数目过多，需要进行如下更新：
N avbits＝N avbits+N CBPS×m STBC  (5)；
N punc＝max(0,(N CW×L LDPC)-N avbits-N shrt)  (6)；
上述式(5)和式(6)表示，用更多的符号承载原先被打掉的检验比特，这样，打掉的比特相当于少了N CBPS×m STBC。经过该更新过程的处理实现对步骤A中初始的可用的编码后的总比特数目N avbits的更新，并且，由于被打掉的比特变少或者是不再需要打孔，使得LDPC的性能得以提升。
步骤E：计算重复比特的数目。
上面步骤D的更新过程是在步骤D中根据(条件一或条件二)可用总比特数不足以支持校验位从而需要打掉部分校验位的情况，然而，不同的码字数目N CW和码字长度L LDPC的选取，还可能出现总比特数目大于校验位及缩短后的信息为的情况，此时需要进行重复(repeat)的操作，如式(7)所示，用以补全可用总比特数，提升性能。
N rep＝max(0,N avbits-N CW×L LDPC×(1-R)-N pld)  (7)；
在式(7)中，N rep表示重复发送的比特数。
应注意：当存在校验比特被打掉时(N punc>0)，就不存在步骤E的重复，当存在重复时，就不存在校验比特被打掉。
为了更清晰地描述上面的过程，802.11标准还给出了下述HT中数据字段的LDPC编码过程图，如图4所示。在图4中,(C)所在的箭头指示的流程为，上述步骤A、步骤B和步骤C中LDPC编码(LDPC Encoding)中基于级联校验的方式(concatenate parity)，计算数据比特(Data Bits)，计算缩短比特(Shortened Bits)以及计算校验比特(Parity Bits) 的实现过程；(d)所在箭头之前为丢弃缩短比特(Discard Shortened Bits)得到的编码块。此后，基于前述步骤D中的条件一和条件二对该编码块进行判断，若执行步骤D的更新过程，则如图4中(d)所在箭头之后所示，得到丢弃校验比特(Discard Parity Bits)而得到的编码块；若执行步骤E的重复过程，则如图4中(e)所在箭头之后所示，得到复制重复比特(Copy Repeat Bits)而得到的编码块。
四.EHT中的LDPC。
与HT中的LDPC不同，EHT中的LDPC编码最大的区别在于PPDU的尾部增加了分片的填充(Padding)，如图5所示，显示的是参与编码的最后一个符号，该符号并不是所有的子载波都参与编码，而是只有部分分片进行编码，这样的操作可以在解码时只解码部分子载波，从而节省开销。另外，在该符号后面，还可能存在数据包扩展(packet extension，PE)字段，同样可以给予接收机更多的处理时间。
具体地，在图5中，过多的信息比特(Excess information bits)与预先-前向纠错比特(Pre-FEC padding bits)，经过加扰(Scrambler)和前向纠错(forward error correction，FEC)得到前向纠错输出比特(FEC output bits)，记为N CBPS,LAST,u；
其中，图5所涉及的相关参数的含义如下：
Excess information bits表示额外信息比特；
Pre-FEC padding bits表示编码前的填充比特，将参与编码；
FEC output bits为编码后输出的比特；
Scrambler和FEC分别为使用扰码进行加扰和使用FEC编码；
Post-FEC padding bits表示编码后还需要填充至总比特数需要的比特数目，并未参与编码；
N CBPS,Last,u表示该参与编码的最后一个符号的编码的比特数；
N CBPS,u表示该参与编码的最后一个符号的总比特数；
此外，在图5中，a表示编码的截取位置：共有4个截取位置，即a＝1、2、3、4，分别表示FEC output bits约占整个符号的1/4、2/4、3/4和1。换而言之，当a＝4时，所有子载波都参与编码。
由于上述不同，在EHT多用户PPDU(multiple user physical layer protocol data unit，MU PPDU)的数据字段的LDPC编码中的步骤A中计算式(1)和式(2)在此处变为了计算下式(8)和式(9)：
N pld,u＝(N SYM,init-1)N DBPS,u+N DBPS,last,init,u  (8)；
N avbits,u＝(N SYM,init-1)N CBPS,u+N CBPS,last,init,u  (9)；
其中，N SYM,init表示初始符号数目(同样，步骤d中有可能更新，所以这里是初始)，N DBPS,last,init,u表示编码前的数据比特(与a有关)。a与N SYM,init可由下式(10)和式(11)计算得出。
Figure PCTCN2022104601-appb-000006
Figure PCTCN2022104601-appb-000007
其中，N Excess,u满足下式(12)：
Figure PCTCN2022104601-appb-000008
在上述式(11)和式(12)中，
Figure PCTCN2022104601-appb-000009
表示用户u的TXVECTOR parameter APEP_LENGTH；N tail表示编码器的尾部比特。
过程B、C与HT类似，可以根据N avbits,u求得对应的码字数目N CW和码字长度L LDPC。如果有任意一个用户符合步骤D中的判断(即打孔过多)，那么同样要通过增加可用比特的数目来放置部分本应打掉的比特，增加LDPC编码性能。相应的，前述判断式条件一和条件二中变为如下所示条件三和条件四：
条件三：
Figure PCTCN2022104601-appb-000010
条件四：
(N punc,u>0.3×N CW,u×L LDPC,u×(1-R u))；
需要说明的是，条件三和条件四的实现仅仅为示例，参数“0.1”也可以使用其他取值(例如0.11、0.15等)替换，参数“30％”也可以使用其他取值(例如0.35、0.4等)替换，该条件主要用于判断是否存在打掉的校验位数据较多而影响LDPC解码的性能。
上述任意条件满足则表示需要更新，更新方式如下：
Figure PCTCN2022104601-appb-000011
由上式(13)应注意到：EHT中的更新方式与HT不再相同。在EHT中，不再按照符号的粒度进行增加，而是按照符号分片的粒度进行增加，这是因为EHT中每个符号对应支持的子载波数目较HT约增加4倍，所以子载波增加的粒度按照符号分片的粒度增加即可，而不需要按照符号的粒度。由上式可以看到，当a init＝4时，需要增加一个符号，且此时更新后的a等于1；而当a init<4时，不需要增加符号数，只需要增加分片即可。
如果不需要更新，则N SYM与a的值就是N SYM,init与a init的值。
关于是否进行了更新，可以通过MU PPDU的EHT-SIG中的LDPC Extra Symbol Segment subfield进行告知；例如，LDPC Extra Symbol Segment subfield的取值为1时，指示存在LDPC额外符号分片，即进行更新；LDPC Extra Symbol Segment subfield的取值为0时，指示不存在LDPC额外符号分片，即不进行更新。
上面主要通过式(8)至(13)描述了EHT中对于MU PPDU的LDPC编码与HT中对于PPDU的LDPC编码的区别，除了该区别之外，不同于HT中由STA自主判断是否基于额外的符号分片进行传输，在EHT中是由AP向STA指示是否基于额外的符号分片进行传输。
其中，EHT对TB PPDU进行LDPC编码过程中也可以采用类似于前述EHT中对于MU PPDU的LDPC编码方式实现。示例性的，在EHT对TB PPDU进行LDPC编码过程中，AP通过触发帧可以 向STA指示出N SYM与a，其中，a是直接给出，N SYM是由触发帧中的多个字段综合计算得到。应注意，这里给出的并非初始N SYM,init与a init，而是更新后的N SYM与a。此后，在TB PPDU的传输过程中，是否需要由额外的符号分片并不需要发送TB PPDU的STA判断，而是由发送触发帧的AP判断，由触发帧中的公共信息字段中的LDPC Extra Symbol Segment subfield给出。
如果LDPC Extra Symbol Segment subfield的值是1，则必然进行如下式(14)的更新过程：
Figure PCTCN2022104601-appb-000012
在式(14)中，将N SYM的取值减去1或者将a init的取值减去1；并且，在HT描述的步骤D中通过式(5)和式(6)的更新方式再加回来，或者在EHT描述的式(13)的更新方式再加回来，即始终增加一个额外的符号分片，避免打孔过多的情况。
如果LDPC Extra Symbol Segment subfield的值是0，则N SYM与a就是初始值，且不用在过程D中更新。
其余编码方式与HT中的描述类似，此处不再赘述。
在上述EHT的实现过程中，对于TB PPDU的传输过程，STA判断是否有额外的符号分片给LDPC编码，需要看AP所发送的触发帧中LDPC Extra Symbol Segment subfield的取值，当取0时无额外符号分片，当取1时有额外符号分片。
然而，触发帧中LDPC Extra Symbol Segment subfield的取值是由发送该触发帧的AP基于其分配的资源判断的，当存在基于适应性RU传输的TB PPDU时，AP对于LDPC Extra Symbol Segment subfield的设定可能不适用于改变后的基于适应性RU传输的TB PPDU。当LDPC Extra Symbol Segment subfield取值为1但TB PPDU适用0的值(即STA不需要额外的符号分片)时，会影响部分效率；但更大的问题是当LDPC Extra Symbol Segment subfield取值为0但TB PPDU适用的值是1(即STA需要额外的符号分片)时，由于未基于额外的符号分片承载相关比特，会影响该TB PPDU接收端的解码性能。
综上所述，在STA基于适应性RU进行传输时，由于基于适应性RU传输的PPDU所承载的比特数不同于基于完整的RU或MRU传输的PPDU所承载的比特数，容易导致STA基于该指定的实现方式并不适配于该STA在适应性RU上的传输，造成通信效率下降。
为了解决上述问题，本申请提供了一种通信方法及通信装置，用于提升WLAN通信效率。下面将结合附图对本申请提供的通信方法和通信装置进行详细介绍。需要说明的是，为便于理解，后文实施例中所描述的不同步骤可以合并为同一个步骤；并且，除非必然的先后时序限定，否则不同步骤之间的时序可以任意配置。例如，步骤S101和步骤S102可以通过一个步骤执行，也可以分开为两个步骤执行；并且，在步骤S101和步骤S102分开为两个步骤执行时，步骤S101先执行且步骤S102后执行，或者是步骤S102先执行且步骤S101后执行，此处不做限定。
请参阅图6，为本申请实施例提供的一种通信方法的一个示意图，该方法包括如下步骤。
S101.AP发送第一指示信息。
本实施例中，AP在步骤S101发送第一指示信息，相应的，STA在步骤S101中接收得到该第一指示信息。其中，第一指示信息用于指示STA的第一RU。
在一种可能的实现方式中，第一RU为RU或MRU。也就是说，AP在步骤S101通过第一指示信息所指示的第一RU可以为RU，也可以是MRU，使得方案适配于不同的RU分配场景。其中，第一指示信息可以通过前述图2b中资源单元分配(RU Allocation)字段实现，也可以通过前述图2d中资源单元分配(RU Allocation)字段实现，或者是通过其他的实现方式指示STA的第一RU，此处不做限定。
在一种可能的实现方式中，该第一指示信息承载于触发帧，该触发帧还包括第三指示信息，该第三指示信息用于指示存在LDPC额外符号分片。具体地，在步骤S101中，用于为STA指示该STA的第一RU的第一指示信息承载于触发帧，并且，该触发帧还包括用于指示存在LDPC额外符号分片的第三指示信息，使得通过同一触发帧实现多个指示信息的承载，可以节省开销，进一步提升通信效率。
可选的，该第三指示信息包括LDPC额外符号分片子字段(LDPC Extra Symbol Segment subfield)，且在该LDPC额外符号分片子字段的取值为1时，指示存在LDPC额外符号分片。
可选的，在该LDPC额外符号分片子字段的取值为0时，指示不存在LDPC额外符号分片。
S102.AP发送第二指示信息。
本实施例中，AP在步骤S102发送第二指示信息，相应的，STA在步骤S102中接收得到该第二指示信息。其中，第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。
需要说明的是，“在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片”，可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送PPDU时，且该STA基于该第一RU中的一部分RU所发送的PPDU时，该PPDU包括LDPC额外符号分片；也可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送PPDU且该PPDU包括LDPC额外符号分片；也可以指示在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU且第二指示信息还指示该PPDU包括LDPC额外符号分片。
在一种可能的实现方式中，在步骤S101中第一指示信息承载于触发帧进行发送时，AP在步骤S102所发送的第二指示信息也可以关联于该触发帧进行发送。其中，该触发帧承载于第二PPDU，且该第二指示信息承载于该第二PPDU。具体地，包含有第一指示信息和第三指示信息的触发帧承载于第二PPDU，且AP在步骤S102发送的用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU的第二指示信息也承载于该第二PPDU，使得通过同一个PPDU实现多个指示信息的承载，可以节省开销，进一步提升通信效率。
可选的，第二指示信息可以表示为适应性RU允许字段，或者，第二指示信息可以表示为适应性RU允许子字段，或者，第二指示信息可以表示为适应性TB PPDU允许字段，或者，第二指示信息可以表示为适应性TB PPDU允许子字段。
下面将通过一个具体的实现示例进行描述。如下表3所示示例，第二指示信息通过指 示是否允许使用适应性RU的子字段(Adaptive RU Allowed subfield)实现，第三指示信息通过指示LDPC额外符号分片子字段(LDPC Extra Symbol Segment field)实现。
表3
Figure PCTCN2022104601-appb-000013
在表3中，至少包括第二行数据，即Adaptive RU Allowed subfield取值为1且LDPC Extra Symbol Segment field取值为1，指示允许该STA基于该第一RU中的一部分RU发送PPDU(或指示允许使用适应性RU，或其它指示等)且指示存在LDPC额外符号分片(或指示基于在LDPC额外符号分片发送PPDU，或其它指示等)。
可选的，表3中还包括第三行数据，即Adaptive RU Allowed subfield取值为0且LDPC Extra Symbol Segment field取值为0，指示不允许该STA基于该第一RU中的一部分RU发送PPDU(或指示不允许使用适应性RU，或其它指示等)且指示不存在LDPC额外符号分片(或指示不允许基于在LDPC额外符号分片发送PPDU，或其它指示等)。
可选的，表3中还包括第四行数据，即Adaptive RU Allowed subfield取值为0且LDPC Extra Symbol Segment field取值为1，指示不允许该STA基于该第一RU中的一部分RU发送PPDU(或指示不允许使用适应性RU，或其它指示等)且指示存在LDPC额外符号分片(或指示允许基于在LDPC额外符号分片发送PPDU，或其它指示等)。
也就是说，基于表3的实现过程，当允许Adaptive RU(或称Adaptive TB PPDU)存在时，LDPC Extra Symbol Segment subfield只能等于1；或者说，当允许Adaptive RU(或称Adaptive TB PPDU)存在时，LDPC Extra Symbol Segment subfield禁止为0，即STA发送的PPDU中存在LDPC额外符号分片。而当Adaptive RU这种配置不允许时，LDPC Extra Symbol Segment subfield可以等于1或0。通过设置可用模式来避免支持适应性资源单元时设置LDPC Extra Symbol Segment subfield等于1，从而解决前述技术问题。
需要说明的是，前述表3仅仅为一个实现示例，在实际应用中，第二指示信息和第三指示信息还可以通过其他的方式承载，例如复用同一字段指示，或者是其他的实现方式，此处不做限定。
可选的，该第二PPDU包括不同于该触发帧的第一信息，且第二指示信息承载于该第一信息中；其中，该第一信息可以为前导码(preamble)中的信息，控制帧，管理帧等，此处不做限定。
在一种可能的实现方式中，第二指示信息和第三指示信息还可以通过其它方式实现，下面将通过表4进行说明。
表4
Figure PCTCN2022104601-appb-000014
在表4中，至少包括第二行数据，即Adaptive RU Allowed subfield取值为1且LDPC Extra Symbol Segment field取值为预留(Reserved)，即通过该第二指示信息即可指示允许该STA基于该第一RU中的一部分RU发送PPDU(或指示允许使用适应性RU，或其它指示等)且指示存在LDPC额外符号分片(或指示基于在LDPC额外符号分片发送PPDU，或其它指示等)。该第三指示信息为Reserved，用以在Adaptive RU Allowed subfield取值为1时，含义为该Reserved，例如，此时可以用以指示除了LDPC Extra Symbol Segment field之外的其他含义。从而，使得STA只要在步骤S102中，只要AP发送或STA读到第二行数据中Adaptive RU Allowed subfield取值是1，就表示允许适应性RU，且存在LDPC额外符号分片。
可选的，表4还包括第三行数据，即Adaptive RU Allowed subfield取值为0且LDPC Extra Symbol Segment field取值为0，指示不允许该STA基于该第一RU中的一部分RU发送PPDU(或指示不允许使用适应性RU，或其它指示等)且指示不存在LDPC额外符号分片(或指示不允许基于在LDPC额外符号分片发送PPDU，或其它指示等)。
可选的，表4中还包括第四行数据，即Adaptive RU Allowed subfield取值为0且LDPC Extra Symbol Segment field取值为1，指示不允许该STA基于该第一RU中的一部分RU发送PPDU(或指示不允许使用适应性RU，或其它指示等)且指示存在LDPC额外符号分片(或指示允许基于在LDPC额外符号分片发送PPDU，或其它指示等)。
需要说明的是，该字段的取值仅仅为示意，第二指示信息和第三指示信息还可以通过其他的字段名称或者是其他的取值实现，此处不做限定。
在一种可能的实现方式中，第二指示信息和第三指示信息还可以通过其它方式实现，其中，可以通过同一个字段(或比特)同时指示该第二指示信息和第三指示信息，示例性的，可以将LDPC Extra Symbol segment field和Adaptive RU allowed subfield结合，即不存在Adaptive RU Allowed subfield，仅使用LDPC Extra Symbol segment field表示该第二指示信息和第三指示信息。
例如，当LDPC Extra Symbol Segment field取值为1，表示指示存在LDPC额外符号分片，且允许Adaptive RU(或称允许Adaptive TB PPDU)。
可选的，当LDPC Extra Symbol Segment field取值为0，表示指示不存在LDPC额外符号分片，且允许Adaptive RU(或称允许Adaptive TB PPDU)；或，当LDPC Extra Symbol Segment field取值为0，表示指示不存在LDPC额外符号分片，且不允许Adaptive RU(或称不允许Adaptive TB PPDU)。
需要说明的是，该字段的取值仅仅为示意，第二指示信息和第三指示信息还可以通过其他的字段名称或者是其他的取值实现，此处不做限定。
S103.STA基于第一指示信息和第二指示信息发送第一PPDU。
本实施例中，STA在步骤S103中基于步骤S101接收得到的第一指示信息和步骤S102接收得到的第二指示信息发送第一PPDU；相应的，AP在步骤S103中接收得到该第一PPDU。其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
可选的，第一PPDU占用的第二RU为RU，或者，第一PPDU占用的第二RU为MRU。
可选的，STA在步骤S103中，确定该第一PPDU所占用的第二RU的确定依据除了该第一指示信息和该第二指示信息之外，还可以包括其他的确定依据，例如通过前述图3a和图3b所示方式，STA将RU所在的信道是否为空闲信道作为确定依据，或者是，STA通过载波侦听的结果、信道探测的结果作为确定依据，或者是其他的实现方式，此处不做限定。
在一种可能的实现方式中，STA在步骤S103中所发送的第一PPDU包括第四指示信息，该第四指示信息用于指示该第一PPDU是否包括LDPC额外的符号分片。具体地，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU中的第四指示信息以确定该第一PPDU的配置方式是否包括该LDPC额外符号分片，使得AP后续基于该第四指示信息对该第一PPDU进行解析，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
在一种可能的实现方式中，在步骤S103中，AP接收该第一PPDU之后，该方法还可以进一步包括：首先，该AP根据该第一PPDU的大小确定该第一PPDU的配置方式，该配置方式包括基于存在LDPC额外符号分片的方式配置该第一PPDU；此后，该AP根据该配置方式解析该PPDU。具体地，AP在步骤S103接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU的大小确定该第一PPDU的配置方式为该基于存在LDPC额外符号分片配置该第一PPDU，使得AP基于该配置方式对该第一PPDU进行解析。避免AP根据未基于存在LDPC额外符号分片的配置方式解析该第一PPDU，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
可选的，该配置方式还包括未基存在LDPC额外符号分片的方式配置该第一PPDU。
可选的，AP根据该配置方式解析该PPDU，也可以称为AP根据该配置方式解码该PPDU。
在一种可能的实现方式中，该LDPC额外符号分片包括后-前向纠错填充(post-FEC padding)类型的额外符号分片。具体地，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
具体地，如图5所示，由于EHT中每个符号所对应支持的子载波数量较HT约增加4倍；因此，在当前EHT的LDPC编码过程中，一般认为通过EHT在一个符号的一部分(例如a取值为1时的1/4个符号，a取值为2时的2/4个符号，a取值为3时的3/4个符号)所承载的数据比特足够容纳HT在1个符号上所承载的数据比特。示例性的，以图5中a取值为1的实现为例，将1/4个符号的部分(例如图5中pre-FEC padding部分)作为额外符号分 片，而其余的部分(例如图5中post-FEC padding)一般不用于承载有效信息，以便于为接收侧预留该post-FEC padding所对应的时长(即3/4个符号)，给予接收机更多的处理时间。
而在上述实现方式中，利用post-FEC padding的方式拓展额外的符号分片，即在需要额外符号分片进行编码而生成PPDU时，在前述式(8)至式(12)所采用的a init和N SYM,init仍然等于AP在触发帧所配置的a和N SYM，即无需执行前述式(14)中的更新过程中，将N SYM的取值减去1或者将a init的取值减去1；并且，在步骤D中始终通过前述式(13)进行更新，即通过采用当a<4(或a init<4)时，a+1(或a init+1)且符号不变来拓展符号分片。这样也可以实现额外符号分片的获取。
可选的，由于a＝4(或a init＝4)时无post-FEC padding，无法通过该部分获取额外符号分片，因此，当a＝4(或a init＝4)不使用post-FEC padding获取额外符号分片。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
基于图6所示实施例，AP在步骤S102所发送的第二指示信息用于指示是否允许STA基于所分配的第一RU中的一部分RU发送PPDU，并且，在该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片。也就是说，STA在步骤S103基于第一指示信息所分配的第一RU中的一部分RU发送PPDU时，该PPDU为基于LDPC额外符号分片所配置，使得STA基于LDPC额外符号分片在适应性RU上进行传输。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU上传输时不适配于该指定而在AP侧出现解码性能降低的情况，以提升WLAN通信效率。
请参阅图7，为本申请实施例提供的一种通信方法的一个示意图，该方法包括如下步骤。
S201.AP生成触发帧。
本实施例中，AP在步骤S201中生成触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示该STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片。
S202.AP发送触发帧。
本实施例中，AP在步骤S202发送在步骤S201中生成的触发帧，相应的，STA在步骤S202中接收得到该触发帧。
具体地，步骤S201和步骤S202的实现过程，可以参考前述步骤S101和步骤S102中(当第一指示信息和第三指示信息均承载于触发帧时)的实现过程，此处不再赘述。
S203.STA基于该触发帧确定第二RU。
本实施例中，STA在步骤S203中基于步骤S202接收得到的触发帧确定第二RU。其中，该第二RU为该第一RU中的一部分，且该第三指示信息指示不存在该LDPC额外符号分片时，基于该第二RU发送第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。
可选的，第二RU为RU，或者，第二RU为MRU。
可选的，STA在步骤S203中，确定第二RU的确定依据除了该触发帧之外，还可以包括其他的确定依据，例如通过前述图3a和图3b所示方式，STA将RU所在的信道是否为空闲信道作为确定依据，或者是，STA通过载波侦听的结果、信道探测的结果作为确定依据，或者是其他的实现方式，此处不做限定。
此外，本申请任一实施例所提及的适应性PPDU(或称适应性TB PPDU)为基于适应性RU所发送的PPDU(或称TB PPDU)，用于表示STA基于适应性的RU资源发送该PPDU(或称TB PPDU)。
具体地，当AP发送的触发帧中的LDPC Extra Symbol Segment subfield设置为0(即第三指示信息指示不存在该LDPC额外符号分片)时，STA在步骤S203中基于适应性RU发送第一PPDU时对适应性RU的选择需要选取不需要额外符号分片的适应性RU，并基于不需要额外符号分片的适应性RU发送第一PPDU。即STA在对待发送数据进行LDPC编码生成该第一PPDU的过程中，不需要经过前述式(13)或(14)所示的更新过程而编码生成该第一PPDU。从而，通过避免使用需要额外分片的Adaptive TB PPDU来解决前述技术问题。
其中，在STA选择适应性RU的过程中，是否需要额外的符号分片，则仍由前述步骤D中的打孔是否过多的条件来判断，具体可以参考前述条件一、条件二、条件三或条件四的描述，此处不再赘述。
可选的，STA在步骤S203所选择的适应性RU(或称适应性TB PPDU)，即第二RU，需要在对应LDPC Extra Symbol Segment subfield取值为0的RU集合中选择，或称，不在LDPC Extra Symbol Segment subfield取值为1的RU集合中选择。
可选的，当AP发送的触发帧中的LDPC Extra Symbol Segment subfield设置为1(即第三指示信息指示存在该LDPC额外符号分片)时，STA在步骤S203中基于适应性RU发送PPDU时对适应性RU的选择不受限制。
可选的，STA选取不需要额外符号分片的适应性RU的方式可以是：在支持的TB PPDU中选择不需要额外符号分片的Adaptive RU发送；或，也可以是在支持的TB PPDU中选择不需要额外符号分片的RU尺寸最大的Adaptive RU发送；或，也可以是在支持的TB PPDU中选择不需要额外符号分片的RU尺寸最小的Adaptive RU发送；或其它实现方式，此处不做限定。
可选的，如果STA在步骤S203中确定不存在不需要额外符号分片的适应性RU，则不发送适应性RU。
在一种可能的实现方式中，STA在步骤S203中基于第二RU所发送的第一PPDU包括第四指示信息，该第四指示信息用于指示该第一PPDU是否包括该LDPC额外符号分片。具体地，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU中的第四指示信息以确定该第一PPDU的配置方式是否包括该LDPC额外符号分片，使得AP后续基于该第四指示信息对该第一PPDU进行解析，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
在一种可能的实现方式中，在步骤S203中，STA在步骤S203中基于第二RU所发送的第一PPDU之后，即AP在步骤S203接收该第一PPDU之后，该方法还可以进一步包括：首先，该AP根据该第一PPDU的大小确定该第一PPDU的配置方式，该配置方式包括基于存在 LDPC额外符号分片的方式；此后，该AP根据该配置方式解析该PPDU。具体地，AP在步骤S203接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU的大小确定该第一PPDU的配置方式为该基于存在LDPC额外符号分片的方式配置该第一PPDU，使得AP基于该配置方式对该第一PPDU进行解析。避免AP根据未基于存在LDPC额外符号分片的方式配置该第一PPDU的配置方式解析该第一PPDU，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
可选的，该配置方式还包括未基于存在LDPC额外符号分片的方式配置该第一PPDU。
可选的，AP根据该配置方式解析该PPDU，也可以称为AP根据该配置方式解码该PPDU。
在一种可能的实现方式中，该LDPC额外符号分片包括后-前向纠错填充(post-FEC padding)类型的额外符号分片。具体地，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
具体地，如图5所示，由于EHT中每个符号所对应支持的子载波数量较HT约增加4倍；因此，在当前EHT的LDPC编码过程中，一般认为通过EHT在一个符号的一部分(例如a取值为1时的1/4个符号，a取值为2时的2/4个符号，a取值为3时的3/4个符号)所承载的数据比特足够容纳HT在1个符号上所承载的数据比特。示例性的，以图5中a取值为1的实现为例，将1/4个符号的部分(例如图5中pre-FEC padding部分)作为额外符号分片，而其余的部分(例如图5中post-FEC padding)一般不用于承载有效信息，以便于为接收侧预留该post-FEC padding所对应的时长(即3/4个符号)，给予接收机更多的处理时间。
而在上述实现方式中，利用post-FEC padding的方式拓展额外的符号分片，即在需要额外符号分片进行编码而生成PPDU时，在前述式(8)至式(12)所采用的a init和N SYM,init仍然等于AP在触发帧所配置的a和N SYM，即无需执行前述式(14)中的更新过程中，将N SYM的取值减去1或者将a init的取值减去1；并且，在步骤D中始终通过前述式(13)进行更新，即通过采用当a<4(或a init<4)时，a+1(或a init+1)且符号不变来拓展符号分片。这样也可以实现额外符号分片的获取。
可选的，由于a＝4(或a init＝4)时无post-FEC padding，无法通过该部分获取额外符号分片，因此，当a＝4(或a init＝4)不使用post-FEC padding获取额外符号分片。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
基于图7所示实施例，在步骤S201和步骤S202中，AP所生成并发送的触发帧包括用于指示该STA的第一RU的第一指示信息和用于指示是否存在LDPC额外符号分片的第三指示信息；此后，STA在步骤S203基于该触发帧确定第一RU中的一部分传输第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。也就是说，STA在步骤S203基于所分配的第一RU选择适应性RU时，该STA选择不需要LDPC额外符号分片的PPDU对应的适应性RU，并基于该适应性RU传输第一PPDU。从而，避免在AP指定STA不基于符号分片进行传输时，出现STA在适应性RU 上传输时不适配于该指定而在AP侧出现解码性能降低的情况，使得STA基于适应性RU传输PPDU时适配于AP的指定，以提升WLAN通信效率。
请参阅图8，为本申请实施例提供的一种通信方法的一个示意图，该方法包括如下步骤。
S301.AP生成触发帧。
本实施例中，AP在步骤S301中生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示该STA的第一RU。
S302.AP发送触发帧。
本实施例中，AP在步骤S302发送在步骤S301中生成的触发帧，相应的，STA在步骤S302中接收得到该触发帧。
具体地，步骤S301和步骤S302的实现过程，可以参考前述步骤S101和步骤S102中(当第一指示信息承载于触发帧时)的实现过程，此处不再赘述。
S303.STA基于触发帧确定的第二RU发送第一PPDU。
本实施例中，STA在步骤S303中基于步骤S302接收得到的触发帧所确定的第二RU发送第一PPDU；相应的，AP在步骤S303中接收得到该第一PPDU。其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
可选的，第二RU为RU，或者，第二RU为MRU。
可选的，STA在步骤S303中，确定第二RU的确定依据除了该触发帧之外，还可以包括其他的确定依据，例如通过前述图3a和图3b所示方式，STA将RU所在的信道是否为空闲信道作为确定依据，或者是，STA通过载波侦听的结果、信道探测的结果作为确定依据，或者是其他的实现方式，此处不做限定。
具体地，当STA在步骤S303中确定基于适应性RU发送第一PPDU时，不管AP在步骤S302所发送的触发帧中的LDPC Extra Symbol Segment subfield如何设置(即不管第三指示信息如何指示)，STA在步骤S303中基于适应性RU所发送的PPDU都采用LDPC Extra Symbol Segment subfield等于1的方式进行配置，即总是采用前述式(14)的方式得到N SYM与a。相应的，在STA基于待发送数据进行编码得到第一PPDU的编码过程中，在步骤D中总是认为需要更新，即总是会在步骤D中增加(表示需要打孔的比特变少)，而无需经过前述条件(例如条件一、条件二、条件三或条件四)的判断过程。换而言之，即STA在步骤S303中基于适应性RU发送第一PPDU时，总是基于存在额外的符号分片的方式进行编码得到该第一PPDU。
在一种可能的实现方式中，STA在步骤S303中基于第二RU所发送的第一PPDU包括第四指示信息，该第四指示信息用于指示该第一PPDU是否包括该LDPC额外符号分片。具体地，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU中的第四指示信息以确定该第一PPDU的配置方式是否包括该LDPC额外符号分片，使得AP后续基于该第四指示信息对该第一PPDU进行解析，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
在一种可能的实现方式中，在步骤S303中，STA在步骤S303中基于第二RU所发送的 第一PPDU之后，即AP在步骤S303接收该第一PPDU之后，该方法还可以进一步包括：首先，该AP根据该第一PPDU的大小确定该第一PPDU的配置方式，该配置方式包括基于存在LDPC额外符号分片的方式配置该第一PPDU；此后，该AP根据该配置方式解析该PPDU。具体地，AP在步骤S303接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU的大小确定该第一PPDU的配置方式为该基于存在LDPC额外符号分片的方式配置该第一PPDU，使得AP基于该配置方式对该第一PPDU进行解析。避免AP根据未基于存在LDPC额外符号分片的方式配置该第一PPDU的配置方式解析该第一PPDU，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
可选的，该配置方式还包括未基于存在LDPC额外符号分片的方式配置该第一PPDU。
可选的，AP根据该配置方式解析该PPDU，也可以称为AP根据该配置方式解码该PPDU。
在一种可能的实现方式中，该LDPC额外符号分片包括后-前向纠错填充(post-FEC padding)类型的额外符号分片。具体地，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
具体地，如图5所示，由于EHT中每个符号所对应支持的子载波数量较HT约增加4倍；因此，在当前EHT的LDPC编码过程中，一般认为通过EHT在一个符号的一部分(例如a取值为1时的1/4个符号，a取值为2时的2/4个符号，a取值为3时的3/4个符号)所承载的数据比特足够容纳HT在1个符号上所承载的数据比特。示例性的，以图5中a取值为1的实现为例，将1/4个符号的部分(例如图5中pre-FEC padding部分)作为额外符号分片，而其余的部分(例如图5中post-FEC padding)一般不用于承载有效信息，以便于为接收侧预留该post-FEC padding所对应的时长(即3/4个符号)，给予接收机更多的处理时间。
而在上述实现方式中，利用post-FEC padding的方式拓展额外的符号分片，即在需要额外符号分片进行编码而生成PPDU时，在前述式(8)至式(12)所采用的a init和N SYM,init仍然等于AP在触发帧所配置的a和N SYM，即无需执行前述式(14)中的更新过程中，将N SYM的取值减去1或者将a init的取值减去1；并且，在步骤D中始终通过前述式(13)进行更新，即通过采用当a<4(或a init<4)时，a+1(或a init+1)且符号不变来拓展符号分片。这样也可以实现额外符号分片的获取。
可选的，由于a＝4(或a init＝4)时无post-FEC padding，无法通过该部分获取额外符号分片，因此，当a＝4(或a init＝4)不使用post-FEC padding获取额外符号分片。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
基于图8所示实现方式，STA在步骤S302所接收的触发帧包括用于指示该STA的第一RU的第一指示信息；此后，STA在步骤S303基于该触发帧确定的第二RU传输第一PPDU时，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。也就是说，STA在步骤S303基于所分配的第一RU选择第二RU作为适应性RU时，该STA在该适应性RU所传输第一PPDU包括LDPC额外符号分片。从而，避免在AP指定STA是否基于符号分片进行传输时，出现STA在适 应性RU上传输时不适配于该指定而导致通信效率较低的情况，使得STA基于适应性RU传输的PPDU包括LDPC额外符号分片，以提升WLAN通信效率。
请参阅图9，为本申请实施例提供的一种通信方法的一个示意图，该方法包括如下步骤。
S401.AP生成触发帧。
本实施例中，AP在步骤S401中生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示该STA的第一RU。
S402.AP发送触发帧。
本实施例中，AP在步骤S402发送在步骤S401中生成的触发帧，相应的，STA在步骤S402中接收得到该触发帧。
具体地，步骤S401和步骤S402的实现过程，可以参考前述步骤S101和步骤S102中(当第一指示信息承载于触发帧时)的实现过程，此处不再赘述。
S403.STA基于触发帧发送PPDU。
本实施例中，STA在步骤S403中基于步骤S402接收得到的触发帧发送PPDU；相应的，AP在步骤403中接收得到该PPDU。
具体地，STA在步骤S403中发送PPDU的实现方式可以采用前述步骤S103的实现方式；或者是，采用前述步骤S203所确定的第二RU而发送PPDU的实现方式；或者是，采用前述步骤S303中基于触发帧确定的第二RU发送第一PPDU的实现方式；或者是，采用当前在EHT中AP通过触发帧可以向STA指示出N SYM与a的方式发送PPDU；或者是其他的实现方式，此处不做限定。
可选的，在步骤S403中，若STA所发送的PPDU为基于触发帧所指示的第一RU中的第二RU所发送的PPDU时，第二RU为RU，或者，第二RU为MRU。
可选的，STA在步骤S403中，确定第二RU的确定依据除了该触发帧之外，还可以包括其他的确定依据，例如通过前述图3a和图3b所示方式，STA将RU所在的信道是否为空闲信道作为确定依据，或者是，STA通过载波侦听的结果、信道探测的结果作为确定依据，或者是其他的实现方式，此处不做限定。
S404.AP基于PPDU的大小确定PPDU的配置方式。
本实施例中，AP基于步骤S403接收得到的PPDU的大小确定该PPDU的配置方式。其中，该配置方式包括基于存在LDPC额外符号分片的方式配置该PPDU，以及，该配置方式包括未基于存在LDPC额外符号分片的方式配置该PPDU。
具体地，在步骤S404中，该AP根据步骤S403接收得到的PPDU的大小确定该PPDU的配置方式，该配置方式包括基于存在LDPC额外符号分片的方式配置该PPDU；此后，该AP根据该配置方式解析该PPDU。从而，避免AP根据未基于存在LDPC额外符号分片的方式配置该第一PPDU的配置方式解析该第一PPDU，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
可选的，该配置方式还包括未基于存在LDPC额外符号分片的方式配置该第一PPDU。
可选的，AP根据该配置方式解析该PPDU，也可以称为AP根据该配置方式解码该PPDU。
具体地，AP如果在步骤S402发送的触发帧中设置LDPC Extra Symbol Segment subfield取值为0(即第三指示信息指示不存在额外的符号分片)，那么，AP在步骤S403接收到STA基于适应性RU发送的PPDU后，在步骤S404中，AP将根据该PPDU的大小自行判断站点采用了哪种配置：即采用LDPC Extra Symbol Segment subfield等于1的配置或等于0的配置。其中，该判断过程可以采用前述描述的条件(例如条件一、条件二、条件三或条件四)进行判断，此处不再赘述。
也就是说，STA在步骤S403对待发送数据进行LDPC编码得到PPDU的编码过程中，不再按照TB PPDU中介绍的(在前述式(8)和式(9))默认回退的再(在前述式(13)中)加回来的方式，而是先尝试LDPC Extra Symbol Segment subfield等于0的配置是否打孔过多(按前述描述的条件判断，若条件满足则打孔过多)；如果打孔过多，则采用LDPC Extra Symbol Segment subfield等于1的配置。由于AP在步骤S403收到TB PPDU时也获知了适应性RU的尺寸大小，因此也可以在步骤S404按照前述描述的条件判断，如果采用0的配置时将会打孔过多，此时可以认为该适应性TB PPDU采用了使用额外符号分片的配置。
在一种可能的实现方式中，若STA在步骤S403发送的PPDU基于LDPC额外符号分片是，该LDPC额外符号分片可以包括后-前向纠错填充(post-FEC padding)类型的额外符号分片。具体地，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
具体地，如图5所示，由于EHT中每个符号所对应支持的子载波数量较HT约增加4倍；因此，在当前EHT的LDPC编码过程中，一般认为通过EHT在一个符号的一部分(例如a取值为1时的1/4个符号，a取值为2时的2/4个符号，a取值为3时的3/4个符号)所承载的数据比特足够容纳HT在1个符号上所承载的数据比特。示例性的，以图5中a取值为1的实现为例，将1/4个符号的部分(例如图5中pre-FEC padding部分)作为额外符号分片，而其余的部分(例如图5中post-FEC padding)一般不用于承载有效信息，以便于为接收侧预留该post-FEC padding所对应的时长(即3/4个符号)，给予接收机更多的处理时间。
而在上述实现方式中，利用post-FEC padding的方式拓展额外的符号分片，即在需要额外符号分片进行编码而生成PPDU时，在前述式(8)至式(12)所采用的a init和N SYM,init仍然等于AP在触发帧所配置的a和N SYM，即无需执行前述式(14)中的更新过程中，将N SYM的取值减去1或者将a init的取值减去1；并且，在步骤D中始终通过前述式(13)进行更新，即通过采用当a<4(或a init<4)时，a+1(或a init+1)且符号不变来拓展符号分片。这样也可以实现额外符号分片的获取。
可选的，由于a＝4(或a init＝4)时无post-FEC padding，无法通过该部分获取额外符号分片，因此，当a＝4(或a init＝4)不使用post-FEC padding获取额外符号分片。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
请参阅图10，为本申请实施例提供的一种通信方法的一个示意图，该方法包括如下步骤。
S501.AP生成触发帧。
本实施例中，AP在步骤S501中生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示该STA的第一RU。
S502.AP发送触发帧。
本实施例中，AP在步骤S502发送在步骤S501中生成的触发帧，相应的，STA在步骤S502中接收得到该触发帧。
具体地，步骤S501和步骤S502的实现过程，可以参考前述步骤S101和步骤S102中(当第一指示信息承载于触发帧时)的实现过程，此处不再赘述。
S503.STA基于触发帧发送PPDU。
本实施例中，STA在步骤S503中基于步骤S502接收得到的触发帧发送PPDU；相应的，AP在步骤403中接收得到该PPDU。其中，该PPDU包括第四指示信息，该第四指示信息用于指示该PPDU是否包括LDPC额外符号分片。其中，STA在步骤S503中可以基于触发帧所指示的第一RU中的一部分发送该PPDU。
可选的，在步骤S503中，若STA所发送的PPDU为基于触发帧所指示的第一RU中的一部分RU所发送的PPDU时，第一RU中的一部分RU为RU，或者，第一RU中的一部分RU为MRU。
可选的，STA在步骤S503中，确定第一RU中的一部分RU的确定依据除了该触发帧之外，还可以包括其他的确定依据，例如通过前述图3a和图3b所示方式，STA将RU所在的信道是否为空闲信道作为确定依据，或者是，STA通过载波侦听的结果、信道探测的结果作为确定依据，或者是其他的实现方式，此处不做限定。
可选的，STA在步骤S503中发送PPDU时，该PPDU存在LDPC Extra Symbol Segment指示(即第四指示信息)，可以告知AP该PPDU的配置方式。
示例性的，当该LDPC Extra Symbol Segment指示取值为1时，表示该STA基于前述式(13)或(14)所示的更新过程而编码生成该PPDU，即在编码生成该PPDU的过程中，所使用的参数a init和N SYM,init不是AP在步骤S502中触发帧所配置的a和N SYM；当该LDPC Extra Symbol Segment指示取值为0时，表示该STA未基于前述式(13)或(14)所示的更新过程而编码生成该PPDU，即在编码生成该PPDU的过程中，所使用的参数a init和N SYM,init为AP在步骤S502中触发帧所配置的a和N SYM。
需要说明的是，该字段的取值仅仅为示意，第四指示信息还可以通过其他的字段名称或者是字段的取值实现，例如，在该LDPC Extra Symbol Segment的取值为0时，指示STA在步骤S503中基于存在LDPC额外符号分片的方式发送PPDU；又如，在该LDPC Extra Symbol Segment的取值为1时，指示STA在步骤S503中未基于存在LDPC额外符号分片的方式发送PPDU；或者是其他的实现方式，此处不做限定。
也就是说，AP如果在步骤S502发送的触发帧中设置LDPC Extra Symbol Segment subfield取值为0(即触发帧中第三指示信息指示不存在LDPC额外符号分片)，在步骤S503 中，基于适应性RU所发送的PPDU的STA仍然可以自行决定是否使用0或1的配置(即STA自行决定是否基于LDPC额外符号分片的编码方式生成PPDU)，并在PPDU中的第四指示信息中告知AP该配置。
可选的，如果STA在步骤S503中基于存在LDPC额外符号分片的方式发送PPDU时，该LDPC额外符号分片包括后-前向纠错填充(post-FEC padding)类型的额外符号分片。具体地，EHT所应用的符号分片包括不同的类型，相比于当前EHT仅能应用于预先-前向纠错填充(pre-FEC padding)类型的额外符号分片的实现方式，对LDPC额外符号分片进一步扩展，使得post-FEC padding类型的额外符号分片得以被使用，进一步提升通信效率。
具体地，如图5所示，由于EHT中每个符号所对应支持的子载波数量较HT约增加4倍；因此，在当前EHT的LDPC编码过程中，一般认为通过EHT在一个符号的一部分(例如a取值为1时的1/4个符号，a取值为2时的2/4个符号，a取值为3时的3/4个符号)所承载的数据比特足够容纳HT在1个符号上所承载的数据比特。示例性的，以图5中a取值为1的实现为例，将1/4个符号的部分(例如图5中pre-FEC padding部分)作为额外符号分片，而其余的部分(例如图5中post-FEC padding)一般不用于承载有效信息，以便于为接收侧预留该post-FEC padding所对应的时长(即3/4个符号)，给予接收机更多的处理时间。
而在上述实现方式中，利用post-FEC padding的方式拓展额外的符号分片，即在需要额外符号分片进行编码而生成PPDU时，在前述式(8)至式(12)所采用的a init和N SYM,init仍然等于AP在触发帧所配置的a和N SYM，即无需执行前述式(14)中的更新过程中，将N SYM的取值减去1或者将a init的取值减去1；并且，在步骤D中始终通过前述式(13)进行更新，即通过采用当a<4(或a init<4)时，a+1(或a init+1)且符号不变来拓展符号分片。这样也可以实现额外符号分片的获取。
可选的，由于a＝4(或a init＝4)时无post-FEC padding，无法通过该部分获取额外符号分片，因此，当a＝4(或a init＝4)不使用post-FEC padding获取额外符号分片。
可选的，该LDPC额外符号分片包括pre-FEC padding类型的额外符号分片。
基于图10所示实施例，AP在接收得到来自STA的第一PPDU之后，还可以基于该第一PPDU中的第四指示信息以确定该第一PPDU的配置方式是否包括该LDPC额外符号分片，使得AP后续基于该第四指示信息对该第一PPDU进行解析，提升在AP侧对该第一PPDU的解析成功率，进一步提升通信效率。
上面对本申请实施例提供的通信方法进行介绍，下面将对本申请实施例提供的通信装置进行描述。
请参阅图11，为本申请实施例提供的一种通信装置1100的一个示意图。
如图11所示，该通信装置1100包括收发单元1101。
可选地，该通信装置1100还包括处理单元1102。
可选地，该收发单元1101用于执行该通信装置1100的接收或发送的过程，因此，该收发单元1101也可以表示为用于执行该通信装置1100的发送过程的发送单元11011，和/或，该收发单元1101也可以表示为用于执行该通信装置1100的接收过程的接收单元11012。
可选地，该通信装置1100用于执行本申请前述实施例中AP的实现过程。
一种可能的设计中，该通信装置1100包括发送单元11011和接收单元11012；
该发送单元11011，用于发送第一指示信息，该第一指示信息用于指示STA的第一RU；
该发送单元11011，还用于发送第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；
该接收单元11012，用于接收第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
一种可能的设计中，该通信装置1100包括收发单元1101和处理单元1102；
该处理单元1102，用于生成触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；
该收发单元1101，用于发送该触发帧。
一种可能的设计中，该通信装置1101包括收发单元1101和处理单元1102；
该处理单元1102，用于生成触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示STA的第一RU；
该收发单元1101，用于基于该触发帧确定的第二RU接收第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
需要说明的是，该通信装置1100还可以用于执行前述图1a至图10中AP所执行的其它实施例，并实现相应的有益效果，具体可以参考前述描述，此处不再赘述。
可选地，该通信装置1100用于执行本申请前述实施例中STA的实现过程。
一种可能的设计中，该通信装置1100包括发送单元11011和接收单元11012；
该接收单元11012，用于接收第一指示信息，该第一指示信息用于指示STA的第一RU；
该接收单元11012，还用于接收第二指示信息，其中，该第二指示信息用于指示是否允许该STA基于该第一RU中的一部分RU发送PPDU，且该第二指示信息指示允许该STA基于该第一RU中的一部分RU发送该PPDU时，该PPDU包括LDPC额外符号分片；
该发送单元11011，用于基于该第一指示信息和该第二指示信息发送第一PPDU，其中，该第一PPDU占用的第二RU为该第一RU中的一部分RU，且该第一PPDU包括该LDPC额外符号分片。
一种可能的设计中，该通信装置1100包括收发单元1101和处理单元1102；
该收发单元1101，用于接收触发帧，该触发帧包括第一指示信息和第三指示信息，其中，该第一指示信息用于指示STA的第一RU，该第三指示信息用于指示是否存在LDPC额外符号分片；
该处理单元1102，用于基于该触发帧确定第二RU，其中，该第二RU为该第一RU中的一部分，且该第三指示信息指示不存在该LDPC额外符号分片时，基于该第二RU发送第一PPDU时，该第一PPDU为不需要LDPC额外符号分片的PPDU。
一种可能的设计中，该通信装置1100包括收发单元1101和处理单元1102；
该收发单元1101，用于接收触发帧，该触发帧包括第一指示信息，其中，该第一指示信息用于指示STA的第一RU；
该处理单元1102，用于基于该触发帧确定的第二RU发送第一PPDU，其中，该第一PPDU包括LDPC额外符号分片，该第二RU为该第一RU的一部分。
需要说明的是，该通信装置1100还可以用于执行前述图1a至图10中STA所执行的其它实施例，并实现相应的有益效果，具体可以参考前述实施例中的描述，此处不再赘述。
以上介绍了本申请实施例的AP和STA，以下介绍所述AP和STA可能的产品形态。应理解，以下介绍仅为举例，不限制本申请实施例的AP和STA的产品形态仅限于此。
作为一种可能的产品形态，本申请实施例所述的AP和STA，可以由一般性的总线体系结构来实现。
为了便于说明，参见图12，图12是本申请实施例提供的通信装置1200的结构示意图。该通信装置1200可以为AP或STA，或其中的芯片。图12仅示出了通信装置1200的主要部件，该通信装置1200至少包括输入输出端口1202。
可选的，该输入输出端口1202也可以称为通信端口，或者，通信接口等。
可选的，该通信装置1200还包括处理器1201；此外，所述通信装置1200还可以进一步包括存储器1203。
可选地，该装置1200还可以增加总线1204，该总线1204用于建立输入输出端口1202和/或存储器1203与处理器1201的连接。
处理器1201主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据。存储器1203主要用于存储软件程序和数据。输入输出端口1202可以包括控制电路和天线，控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。例如输入输出端口1202可以为触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当通信装置1200开机后，处理器1201可以读取存储器1203中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器1201对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1201，处理器1201将基带信号转换为数据并对该数据进行处理。
可选的，存储器1203可以位于处理器1201中。
在上述任一种设计中，处理器1201中可以包括用于实现接收和发送功能的通信接口。例如该通信接口可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口 或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在上述任一种设计中，处理器1201可以存有指令，该指令可为计算机程序，计算机程序在处理器1201上运行，可使得通信装置1200执行上述任一实施例中描述的方法。计算机程序可能固化在处理器1201中，该种情况下，处理器1201可能由硬件实现。
在一种实现方式中，通信装置1200可以包括电路，所述电路可以实现前述任一实施例中发送或接收或者通信的功能。本申请中描述的处理器和通信接口可实现在集成电路(integrated circuit，IC)、模拟IC、无线射频集成电路(radio frequency integrated circuit，RFIC)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和通信接口也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
本申请中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图12的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，计算机程序的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端、智能终端、蜂窝电话、无线设备、+手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
作为一种可能的产品形态，本申请实施例所述的AP和STA，可以由通用处理器来实现。
应理解，上述各种产品形态的通信装置，具有上述任一实施例中AP或STA的任意功能，此处不再赘述。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序代码，当上述处理器执行该计算机程序代码时，电子设备执行前述任一实施例中的方法。
本申请实施例还提供一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行前述任一实施例中的方法。
本申请实施例还提供一种通信装置，该装置可以以芯片的产品形态存在，该装置的结构中包括处理器和接口电路，该处理器用于通过接收电路与其它装置通信，使得该装置执行前述任一实施例中的方法。
本申请实施例还提供一种无线通信系统，包括AP和STA，该AP和STA可以执行前述任一实施例中的方法。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机可读存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (23)

  1. 一种通信方法，其特征在于，包括：
    接入点AP发送第一指示信息，所述第一指示信息用于指示站点STA的第一资源单元RU；
    所述AP发送第二指示信息，其中，所述第二指示信息用于指示是否允许所述STA基于所述第一RU中的一部分RU发送物理层协议数据单元PPDU，且所述第二指示信息指示允许所述STA基于所述第一RU中的一部分RU发送所述PPDU时，所述PPDU包括低密度奇偶校验LDPC额外符号分片；
    所述AP接收第一PPDU，其中，所述第一PPDU占用的第二RU为所述第一RU中的一部分RU，且所述第一PPDU包括所述LDPC额外符号分片。
  2. 一种通信方法，其特征在于，包括：
    站点STA接收第一指示信息，所述第一指示信息用于指示所述STA的第一资源单元RU；
    所述STA接收第二指示信息，其中，所述第二指示信息用于指示是否允许所述STA基于所述第一RU中的一部分RU发送物理层协议数据单元PPDU，且所述第二指示信息指示允许所述STA基于所述第一RU中的一部分RU发送所述PPDU时，所述PPDU包括低密度奇偶校验LDPC额外符号分片；
    所述STA基于所述第一指示信息和所述第二指示信息发送第一PPDU，其中，所述第一PPDU占用的第二RU为所述第一RU中的一部分RU，且所述第一PPDU包括所述LDPC额外符号分片。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一指示信息承载于触发帧，所述触发帧还包括第三指示信息，所述第三指示信息用于指示存在LDPC额外符号分片。
  4. 根据权利要求3所述的方法，其特征在于，所述触发帧承载于第二PPDU，且所述第二指示信息承载于所述第二PPDU。
  5. 一种通信方法，其特征在于，包括：
    站点STA接收触发帧，所述触发帧包括第一指示信息和第三指示信息，其中，所述第一指示信息用于指示所述STA的第一资源单元RU，所述第三指示信息用于指示是否存在低密度奇偶校验LDPC额外符号分片；
    所述STA基于所述触发帧确定第二RU，其中，所述第二RU为所述第一RU中的一部分，且所述第三指示信息指示不存在所述LDPC额外符号分片时，基于所述第二RU发送第一物理层协议数据单元PPDU时，所述第一PPDU为不需要LDPC额外符号分片的PPDU。
  6. 一种通信方法，其特征在于，包括：
    站点STA接收触发帧，所述触发帧包括第一指示信息，其中，所述第一指示信息用于指示所述STA的第一资源单元RU；
    所述STA基于所述触发帧确定的第二RU发送第一物理层协议数据单元PPDU，其中，所述第一PPDU包括低密度奇偶校验LDPC额外符号分片，所述第二RU为所述第一RU的一部分。
  7. 一种通信方法，其特征在于，包括：
    接入点AP生成触发帧，所述触发帧包括第一指示信息，其中，所述第一指示信息用于指示所述STA的第一资源单元RU；
    所述AP基于所述触发帧确定的第二RU接收第一物理层协议数据单元PPDU，其中，所述第一PPDU包括低密度奇偶校验LDPC额外符号分片，所述第二RU为所述第一RU的一部分。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述第一PPDU包括第四指示信息，所述第四指示信息用于指示所述第一PPDU是否包括所述LDPC额外符号分片。
  9. 根据权利要求1至8任一项所述的方法，其特征在于，所述LDPC额外符号分片包括后-前向纠错填充post-FEC padding类型的额外符号分片。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，所述第一RU为RU或多资源单元MRU。
  11. 一种通信装置，其特征在于，包括发送单元和接收单元；
    所述发送单元，用于发送第一指示信息，所述第一指示信息用于指示站点STA的第一资源单元RU；
    所述发送单元，还用于发送第二指示信息，其中，所述第二指示信息用于指示是否允许所述STA基于所述第一RU中的一部分RU发送物理层协议数据单元PPDU，且所述第二指示信息指示允许所述STA基于所述第一RU中的一部分RU发送所述PPDU时，所述PPDU包括低密度奇偶校验LDPC额外符号分片；
    所述接收单元，用于接收第一PPDU，其中，所述第一PPDU占用的第二RU为所述第一RU中的一部分RU，且所述第一PPDU包括所述LDPC额外符号分片。
  12. 一种通信装置，其特征在于，包括发送单元和接收单元；
    所述接收单元，用于接收第一指示信息，所述第一指示信息用于指示站点STA的第一资源单元RU；
    所述接收单元，还用于接收第二指示信息，其中，所述第二指示信息用于指示是否允许所述STA基于所述第一RU中的一部分RU发送物理层协议数据单元PPDU，且所述第二指示信息指示允许所述STA基于所述第一RU中的一部分RU发送所述PPDU时，所述PPDU包括低密度奇偶校验LDPC额外符号分片；
    所述发送单元，用于基于所述第一指示信息和所述第二指示信息发送第一PPDU，其中，所述第一PPDU占用的第二RU为所述第一RU中的一部分RU，且所述第一PPDU包括所述LDPC额外符号分片。
  13. 根据权利要求11或12所述的装置，其特征在于，所述第一指示信息承载于触发帧，所述触发帧还包括第三指示信息，所述第三指示信息用于指示存在LDPC额外符号分片。
  14. 根据权利要求13所述的装置，其特征在于，所述触发帧承载于第二PPDU，且所述第二指示信息承载于所述第二PPDU。
  15. 一种通信装置，其特征在于，包括收发单元和处理单元；
    所述收发单元，用于接收触发帧，所述触发帧包括第一指示信息和第三指示信息，其中，所述第一指示信息用于指示站点STA的第一资源单元RU，所述第三指示信息用于指示 是否存在低密度奇偶校验LDPC额外符号分片；
    所述处理单元，用于基于所述触发帧确定第二RU，其中，所述第二RU为所述第一RU中的一部分，且所述第三指示信息指示不存在所述LDPC额外符号分片时，基于所述第二RU发送第一物理层协议数据单元PPDU时，所述第一PPDU为不需要LDPC额外符号分片的PPDU。
  16. 一种通信装置，其特征在于，收发单元和处理单元；
    所述收发单元，用于接收触发帧，所述触发帧包括第一指示信息，其中，所述第一指示信息用于指示站点STA的第一资源单元RU；
    所述处理单元，用于基于所述触发帧确定的第二RU发送第一物理层协议数据单元PPDU，其中，所述第一PPDU包括低密度奇偶校验LDPC额外符号分片，所述第二RU为所述第一RU的一部分。
  17. 一种通信装置，其特征在于，收发单元和处理单元；
    所述处理单元，用于生成触发帧，所述触发帧包括第一指示信息，其中，所述第一指示信息用于指示站点STA的第一资源单元RU；
    所述收发单元，用于基于所述触发帧确定的第二RU接收第一物理层协议数据单元PPDU，其中，所述第一PPDU包括低密度奇偶校验LDPC额外符号分片，所述第二RU为所述第一RU的一部分。
  18. 根据权利要求11至17任一项所述的装置，其特征在于，所述第一PPDU包括第四指示信息，所述第四指示信息用于指示所述第一PPDU是否包括所述LDPC额外符号分片。
  19. 根据权利要求11至18任一项所述的装置，其特征在于，所述LDPC额外符号分片包括后-前向纠错填充post-FEC padding类型的额外符号分片。
  20. 根据权利要求11至19任一项所述的装置，其特征在于，所述第一RU为RU或多资源单元MRU。
  21. 一种通信装置，其特征在于，包括至少一个处理器，与存储器耦合；
    所述存储器用于存储程序或指令；
    所述至少一个处理器用于执行所述程序或指令，以使所述装置实现如权利要求1至10中任一项所述的方法。
  22. 一种包含程序指令的计算机程序产品，其特征在于，当所述程序指令在计算机上运行时，使得所述计算机执行如权利要求1至10任一项所述的方法。
  23. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储程序指令，当所述程序指令运行时，使得如权利要求1至10任一项所述的方法被执行。
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CN111669260A (zh) * 2019-03-08 2020-09-15 华为技术有限公司 一种数据传输方法及相关设备
WO2021089758A1 (en) * 2019-11-08 2021-05-14 Canon Kabushiki Kaisha Method and apparatus for choosing transmission parameters values in a multi-user transmission
CN112821998A (zh) * 2019-11-15 2021-05-18 华为技术有限公司 传输物理层协议数据单元的方法和装置
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WO2021089758A1 (en) * 2019-11-08 2021-05-14 Canon Kabushiki Kaisha Method and apparatus for choosing transmission parameters values in a multi-user transmission
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