Abstract: An encoding method, a decoding method, and an apparatus are provided, allowing for support of a next-generation Wi-Fi protocol of IEEE 802.11ax (for example, 802.11be, Wi-Fi 7, or EHT), a next-generation Wi-Fi protocol of IEEE 802.11be (for example, 802.11bn, Wi-Fi 8, or UHR), Wi-Fi AI, a millimeter wave (MMW), an ultra-wideband (UWB), sensing, or the like. After obtaining an information bit sequence, a first communication apparatus performs LDPC encoding on the information bit sequence based on a parity-check matrix to obtain an encoded sequence, and outputs the sequence. A length of the sequence is N1, N1 is n times 1944, and n is an integer greater than or equal to 2. Z of the parity-check matrix may be equal to 81. After obtaining to-be-decoded information, a second communication apparatus performs LDPC decoding based on the parity-check matrix to obtain the information bit sequence. The method can improve decoding performance.

Abstract: A first apparatus generates and sends a first PPDU. A frequency domain resource corresponding to a first PPDU bandwidth includes a frequency domain resource corresponding to a reference bandwidth, the frequency domain resource corresponding to the reference bandwidth is located at an edge of the frequency domain resource corresponding to the first PPDU bandwidth, and the reference bandwidth is less than the first PPDU bandwidth. A transmit power of the first PPDU on each subcarrier of M subcarriers is less than or equal to a first threshold, and the M subcarriers belong to guard tones corresponding to the first PPDU bandwidth but do not belong to the guard tones corresponding to the reference bandwidth. The M subcarriers function similar to guard tones, so that the guard tones corresponding to the reference bandwidth can meet a requirement of a tone plan corresponding to the first PPDU bandwidth.

Abstract: A signal measurement method is provided. The method includes a first station receiving a first message from a first access point, where the first message is used to request the first station to send a first measurement result to the first access point when a difference between the first measurement result and a second measurement result is greater than a first threshold, the first measurement result is a result measured by the first station at a first time and related to a second access point, the second measurement result is a result measured by the first station at a second time and related to the second access point, and the second time is earlier than the first time. The first measurement result is sent to the first access point when the difference between the first measurement result and the second measurement result is greater than the first threshold.

Abstract: This application relates to a communication method and apparatus. In the method, a first device may schedule a service flow between a second device and a third device based on an SCS request frame from the second device, so that the first device does not need to receive the SCS request frame from the second device and the third device a plurality of times, to separately schedule transmission of the service flow on the second device and transmission of the service flow on the third device based on a plurality of SCS request frames.

Abstract: Embodiments provide a communication method including sending a physical layer protocol data unit (PPDU) including a field usable for beam training. A frequency domain range corresponding to the field includes a first and a second frequency domain sub-range, the first and the second frequency domain sub-ranges have a non-overlapping part, and a sum of the first and the second frequency domain sub-range is less than or equal to a frequency domain range corresponding to the PPDU. The method further includes sending a first beam set in the first frequency domain sub-range and a second beam set in the second frequency domain sub-range. Directions of a first beam sent in the first frequency domain sub-range and of a second beam sent in the second frequency domain sub-range are different, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

Abstract: A method for sending a physical layer protocol data unit (PPDU) may be applied to some scenarios in which PPDU alignment is implemented. For example, in multi-link transmission of non-simultaneous transmit and receive, it is ensured that a time error of simultaneous ending of a plurality of PPDUs does not exceed 8 microseconds. In the method, a transmitter controls duration of one or more fields of a packet extension (PE) field, an Extremely High Throughput (EHT)-signal (SIG) field, and an EHT-long training field (LTF) field of the PPDU, and/or delays a sending time of the PPDU so that an error between an end time of the PPDU and a specific time (for example, a first time) is not greater than an error threshold, thereby implementing PPDU alignment.

Abstract: Embodiments of this application provide a probe request and response technology between a station and a plurality of access point multi-link devices (AP MLDs). During implementation of this application, a station may obtain communication parameters of a plurality of APs of one or more AP MLDs by sending one probe request frame, to obtain communication parameters of the AP MLD on a plurality of links, thereby efficiently implementing association between the station and the AP MLD or establishing multi-link transmission between the station and the AP MLD.

Abstract: This application discloses a communication method and apparatus, and supports IEEE protocols. The method includes: a station receives a first radio frame from an access point in a first mode, where the first radio frame is used to trigger the station to transition a mode, and the first radio frame includes identification information of the station; the station transitions from the first mode to a second mode after receiving the first radio frame; and the station receives a message frame from the access point in the second mode. Power consumption of the station in the first mode is lower than power consumption of the station in the second mode. This solution can ensure that the station is triggered, by only a Wi-Fi signal sent to the station, to transition a mode, thereby reducing power consumption of the station.

Abstract: This application provides a method for transmitting a PPDU and a communication apparatus. An AP sends a trigger frame to trigger at least one STA to transmit an uplink PPDU. After receiving the trigger frame, the at least one STA transmits respective uplink PPDUs. The uplink PPDU includes a data field and LTFs. The data field is carried on a distributed RU. The LTFs are carried on all subcarriers in a first transmission bandwidth. The first transmission bandwidth is a bandwidth occupied by a distributed RU that is allocated by the AP to the at least one STA for transmitting the uplink PPDU. Alternatively, the LTFs are carried on all subcarriers of a plurality of continuous RUs corresponding to the distributed RU.

Abstract: An encoding method, a decoding method, and an apparatus are provided, and are applied to support a next-generation Wi-Fi protocol (for example, 802.11be, Wi-Fi 7, or EHT) of IEEE 802.11ax, a next-generation Wi-Fi protocol (for example, 802.11bn, Wi-Fi 8, or UHR) of IEEE 802.11be, Wi-Fi AI, millimeter wave (MMW), ultra-wideband (UWB), sensing, or the like. The method includes: A first communication apparatus obtains an information bit sequence, performs LDPC encoding on the information bit sequence based on a parity check matrix, to obtain an encoded sequence, and outputs the sequence. A length of the sequence is N1, where N1 is n times 1944, and n is an integer greater than or equal to 2. After obtaining to-be-decoded information, a second communication apparatus performs LDPC decoding based on the parity check matrix, to obtain the information bit sequence. The method can improve decoding performance.

Abstract: Embodiments of this application provide methods and related apparatuses related to access point (AP) multi-link device discovery, for example, in a WLAN supporting 802.11be. An example method include receiving, by a station, a management frame from a reporting access point (AP), wherein the management frame comprises a reduced neighbor report (RNR) element, and a target beacon transmission time (TBTT) information field in the RNR element comprises an information field, wherein the information field carries a multi-link device (MLD) identifier of an AP MLD with which a reported AP is affiliated; and parsing, by the station, the management frame.

Abstract: This application provides a data transmission method and an apparatus, to reduce a PAPR of data, along with a smaller computing amount and lower device complexity. In the method, a first apparatus generates first frequency domain data, and the first apparatus maps the first frequency domain data to a tone included in a transmission bandwidth for transmission. The transmission bandwidth includes a first transmission bandwidth and a second transmission bandwidth, the first frequency domain data includes second frequency domain data mapped to a first tone included in the first transmission bandwidth and third frequency domain data mapped to a second tone included in the second transmission bandwidth, and the second frequency domain data is in mirror conjugation and alternating negation with the third frequency domain data.

Abstract: This application relates to the field of wireless communication, for example, being applied to a wireless local area network supporting the 802.11be standard, and in particular, relates to a channel access method for a multi-link device and a related apparatus. The method includes: when a length of a first PPDU transmitted on a first link by a first multi-link device is less than or equal to a first value, skipping starting, by the first multi-link device, a medium synchronization delay timer on a second link, where the first multi-link device is not allowed to perform simultaneous transmitting and receiving on the first link and the second link. In embodiments of this application, channel access efficiency can be improved when a non-STR MLD is in a blind state/self-interference state.

Abstract: Embodiments of this disclosure provide an information transmission method, a communication apparatus, a storage medium, a chip, and a program product. The method includes: receiving, by a first device, a trigger-based frame from a second device, where the trigger-based frame includes distributed resource unit indication information; determining one or more distributed resource blocks based on the distributed resource unit indication information, where each distributed resource block includes N1 data subcarriers and N2 pilot subcarriers, and an absolute value of an index difference between every two data subcarriers of N3 data subcarriers in the N1 data subcarriers is greater than or equal to 4; and sending a response to the trigger-based frame to the second device on the one or more distributed resource blocks.

Abstract: This application provides a resource unit indication method, an access point, and a station. In the method, a resource unit allocation subfield in a trigger frame includes a frequency band range indication and a resource unit indication. The resource unit indication is used to indicate an MRU allocated to a station. The frequency band range indication is used to indicate a frequency band range in which an RU in the MRU is located. For example, the frequency band range indication is used to indicate 80 MHz in which a smallest RU in the MRU is located. In this way, the frequency band range indication indicates a frequency band range related to the MRU, and can further carry more information, for example, the frequency band range in which the smallest RU is located. It may be learned that this application may be applied to 802.11ax, 802.11be, and a future Wi-Fi system.

Abstract: In a method for indicate simultaneous transmit and receive (STR) capability in a Wi-Fi system, a first multi-link device (MLD) generates and sends STR capability information that indicates interference parameter information between a first link using a first bandwidth and a second link using a second bandwidth. A second device receives the STR capability information and obtains an interference parameter threshold. The second device then determines, based on the interference parameter threshold and the interference parameter information, whether the first MLD supports an STR operation on the first link and the second link.

Abstract: An encoding method, a decoding method, and a related apparatus are provided, which may be applied to a wireless local area network system. An encoding apparatus determines first available bits based on to-be-encoded data bits and a first encoding rate, and determines a second codeword number and a second codeword length based on the first available bits and a correspondence between the first available bits, a first codeword number, and a first codeword length at the first encoding rate. The second codeword number is obtained based on the first codeword number, and the second codeword length is obtained based on the first codeword length. The encoding apparatus does not need to store a correspondence between available bits, a codeword number, and a codeword length at a second encoding rate, thereby reducing storage overheads of the encoding apparatus.

Abstract: A data transmission method includes sending, by a first station in a first multi-link device, a third frame. The third frame indicates the first station enables a mode of sharing a quantity of spatial streams. The mode of sharing the quantity of spatial streams is used for enabling the first station to use the shared spatial streams. A quantity of shared spatial streams is a maximum quantity of shared spatial streams supported by the first multi-link device. The data transmission method also includes receiving, by the first station, a fourth frame. The fourth frame is used for responding to the third frame.

Abstract: A communication method and a communication apparatus. A first device generates a first physical layer protocol data unit (PPDU). A quantity of subcarriers of a data part of the first PPDU in a first bandwidth is the same as a quantity of subcarriers of a data part of a second PPDU in a second bandwidth. A subcarrier spacing of the data part of the first PPDU in the first bandwidth is less than a subcarrier spacing of the data part of the second PPDU in the second bandwidth. The second PPDU is a PPDU defined in an existing standard, for example, an ultra-high reliability (UHR) PPDU, a high efficiency (HE) PPDU, a very high throughput (VHT) PPDU, and an extreme high throughput (EHT) PPDU. The second bandwidth is greater than the first bandwidth.

Abstract: This application relates to a communication method and apparatus. An AP MLD receives first downlink data from a current AP MLD, where the first downlink data is data encrypted using a first key negotiated by the current AP MLD and a non-AP MLD, and a target AP MLD is an AP MLD of the non-AP MLD after a basic service set BSS transition. The target AP MLD performs lower-medium access control (LMAC) layer processing and physical layer processing on the first downlink data, to obtain second downlink data. According to the method and the apparatus disclosed herein, roaming performance of the non-AP MLD can be improved.