Abstract: Embodiments of this application disclose a multi-link communication method and a related apparatus. The method includes: a first station sends, on a first link, a radio frame to a second station, where the first station is one of multiple stations included in a first multi-link device. The multiple stations included in the first multi-link device work on multiple links, and the multiple links include a first link on which the first station works. The radio frame includes at least two management frames, the at least two management frames are generated by at least two stations that work on different links in the first multi-link device, and the second station is one of multiple stations included in a second multi-link device.

Abstract: This application provides a protocol data unit PPDU transmission method and apparatus, and relates to the field of communication technologies, to indicate, to a STA, a channel for sending a CTS frame. In the method, a first device may send a first data unit. The first data unit may include at least a second data unit and a third data unit. The second data unit is used to carry a first MU-RTS frame. The third data unit is used to carry a second MU-RTS frame. The first MU-RTS frame and the second MU-RTS frame use a same scrambling code initialization value. Based on the foregoing solution, an AP may indicate, to a plurality of STAs by using a plurality of MU-RTS frames, channels for replying CTS frames. The AP may indicate the first MU-RTS frame and the second MU-RTS frame to use the same scrambling code initialization value.

Abstract: Embodiments of this application disclose a method for determining a data buffer status, and an apparatus. The method includes: A first MLD receives first indication information from a second MLD, and determines, based on the first indication information and a correspondence between an association identifier of the first MLD and a data type supported by the first MLD, a buffer status of bufferable data that corresponds to the at least one data type and that is in the second MLD, where the first indication information is used to indicate the buffer status of the bufferable data. According to the embodiments of this application, a data buffer status in a data type dimension can be determined. The embodiments of this application may be applied to a wireless local area network system that supports a next-generation Wi-Fi EHT protocol of the IEEE 802.11, that is, the 802.11 protocol such as 802.11be.

Abstract: Embodiments of this application provide a channel bandwidth configuration method and a device. The method includes: receiving bandwidth configuration information of a BSS, where the bandwidth configuration information of the BSS is carried in an EHT operation element, the EHT operation element includes a channel bandwidth field, a first channel center frequency field, and a second channel center frequency field, the channel bandwidth field indicates channel bandwidth information of the BSS, the first channel center frequency field and the second channel center frequency field indicate channel location information of the BSS, and the bandwidth information is any channel bandwidth in a plurality of channel bandwidths supported by a terminal; and obtaining the channel bandwidth information and the channel location information based on the bandwidth configuration information of the BSS. This application can be applied to a Wi-Fi system that supports the 802.11 standard, for example, the 802.11be standard.

Abstract: An association establishment method and apparatus, for carrying out the method are described. The association establishment method includes broadcasting, by an access point (AP), a trigger frame, wherein the trigger frame is used to trigger one or more unassociated stations STAs to perform uplink data transmission and indicate one or more available subchannels for random accessing of the unassociated STAs. The method further includes receiving, by the AP, one or more association request messages sent on available subchannels acquired by the unassociated STAs. Thereafter, the AP broadcasts a multi-block acknowledgement M-BA frame, wherein the M-BA frame includes one or more pieces of association acknowledgement information and the association acknowledgement information is acknowledgement information of the association request message.

Abstract: This application provides a communication method and a communication apparatus. One example method includes: A sending device sends a first physical layer protocol data unit PPDU over a first link, where the first PPDU carries a trigger frame. The sending device sends a second PPDU over a second link, where an end time of sending the second PPDU is not earlier than a first time and not later than a second time, the first time is related to an end time of sending the first PPDU and a state turnaround time in a short interframe space SIFS time, and the second time is related to the end time of sending the first PPDU and the SIFS time.

Abstract: In a communication method, a first access point (AP) in a first AP multi-link device generates a management frame that includes a capability information field. The capability information field includes first indication information indicating whether a second AP, which is also in the first AP multi-link device, has performed a channel switch. The first AP then sends the management frame to a first station (STA).

Abstract: A station (STA)-side data acknowledgment apparatus includes a transceiver configured to send a data frame and send an acknowledgment request, and a processor configured to control the transceiver to send the acknowledgment request after a duration from an end of sending the data frame. The duration is greater than or equal to a transmission delay on a backhaul link between access points (APs). The acknowledgment request is an acknowledgment request for the data frame.

Abstract: A communication method, an access point and a station are provided. The method includes: receiving, by an access point, a sending request sent by a first station, and sending clear to send information to the first station; when the access point receives feedback information sent by the first station, allocating, by the access point, a channel to the first station, and allocating a channel to a second station based on remaining bandwidth; generating a first trigger frame, and sending the first trigger frame to the first station and the second station; and receiving uplink data sent by the first station and the second station. According to the application, bandwidth utilization of the access point and data transmission efficiency can be improved.

Abstract: This application is applicable to a multi-link group addressed traffic transmission method and an apparatus. A first access point (AP) of an AP multi-link device (MLD) sends group addressed traffic indication information indicating whether each AP of other APs of the AP MLD has a group addressed traffic, so that a station (STA) can learn whether the multiple APs have a group addressed traffic. In this way, each STA of the STA MLD does not need to listen to each AP whether each AP has a group addressed traffic. This reduces power consumption of the STA MLD. This application may be applied to a wireless local area network system that supports an IEEE 802.11ax next-generation Wi-Fi EHT protocol, for example, 802.11 series protocols such as 802.11be.

Abstract: This application discloses a multi-link communication probe request method and apparatus. The method includes: a non-access point multi-link device (non-AP MLD) generates a probe request frame, and sends the probe request frame to an access point multi-link device (AP MLD), and the AP MLD receives the probe request frame, and generates a probe response frame and sends to the non-AP MLD. The probe request frame includes a first multi-link element (MLE) that is used to request link information of the AP MLD and that includes a first link information field. The first link information field includes a first field. The first field indicates that the non-AP MLD requests the AP MLD to feed back complete information or partial information of a first link. The first link information field corresponds to the first link.

Abstract: Example methods and apparatus for implementing collision detection in data transmission are described. One example method includes sending a data packet including collision detection information to a receive end, where the collision detection information is used by the receive end to perform collision detection on the data packet. A status indication message sent by the receive end is received by the receive end when sending the data packet. The receive end parses the status indication message. If the status indication message includes collision information, the receive end perform retransmission of the data packet.

Abstract: In a channel listening method, a non-simultaneous transmit and receive multi-link device (NSTR MLD) receives a first response frame on a first link and a second response frame on a second link, wherein an end time of the first response frame is later than an end time of the second response frame, and the first link and the second link belong to a NSTR link pair. The NSTR MLD determines that at least one of the first response frame and the second response frame fails to be received. In response to the determination, the NSTR MLD performs channel listening in a first interframe space after the first response frame ends, wherein a duration of the first interframe space is less than or equal to a duration of a point coordination function interframe space (PIFS).

Abstract: This application relates to the wireless communications field, for example, is applicable to a wireless local area network supporting the 802.11be standard, and in particular, to a PPDU uplink bandwidth indication method and a related apparatus. The method includes: An AP generates and sends a trigger frame. The trigger frame carries first indication information, where the first indication information directly indicates or jointly indicates an EHT TB PPDU bandwidth or an uplink PPDU total transmission bandwidth. The trigger frame carries second indication information, where the second indication information indicates distribution of an HE TB PPDU and/or an EHT TB PPDU in the uplink PPDU total transmission bandwidth, or directly indicate whether an EHT station transmits an HE TB PPDU or an EHT TB PPDU.

Abstract: The technology of this application relates to a first device configured to perform backoff on a primary 20 MHz channel, to perform data transmission with a second device. When a first preset condition is met, the first device switches from the primary 20 MHz channel to a first channel, where the first channel is a channel preconfigured for communication between the first device and the second device, the first channel does not include the primary 20 MHz channel, and the first preset condition at least includes that the primary 20 MHz channel is in a busy state.

Abstract: This application discloses a multi-link establishment method and a related device. A multi-link association response frame carries radio bitmap information, to indicate an AP allowed to be associated with a radio of a STA MLD or a link allowed to be established by using a radio of a STA MLD, so that the radio subsequently switches between different APs or links. The multi-link association response frame carries link establishment status information, to indicate a link establishment status of each link that the STA MLD requests to establish, so that multi-link establishment is more flexible. The multi-link association response frame carries reassociation information, to indicate whether each parameter in association configuration information is reserved, so that a problem that signaling overheads are relatively large due to a reassociation operation is avoided. It can be learned that, in the multi-link establishment method, the foregoing information is carried to improve multi-link establishment flexibility.

Abstract: A multi-link reconfiguration method and apparatus relate to the field of communications technologies are provided to reconfigure a link between two MLDs. The method includes: A first MLD generates a first frame, where the first frame is used to reconfigure a link between the first MLD and a second MLD. The first MLD sends the first frame to the second MLD.

Abstract: The application provide an access method, including: sending, to an access point, a first frame that carries uplink transmission requirement information; and if a second frame that carries information about an uplink transmission resource is received from the access point within agreed time period, sending uplink multi-user transmission data to the access point, where the uplink multi-user transmission data is transmitted on the uplink transmission resource; or if the second frame is not received within an agreed time period, accessing, by a station, a channel in a contention access manner that is based on carrier sense CSMA/CA.

Abstract: Embodiments of this disclosure include a channel access method in a wireless local area network (WLAN) and related apparatus. In the method, a communication device receives a first overlapping basic service set (OBSS) frame on a primary channel, determines a first channel with a busy channel state based on bandwidth information carried in the first OBSS frame, and performs channel contention when switching from the primary channel to a second channel. After the communication device backs off to 0 on the second channel, the communication device determines a third channel used for transmitting data, where the third channel does not include any sub-channel of the first channel, and the first channel includes the primary channel.

Abstract: A coordinated transmission method for a wireless local area network and an apparatus are disclosed. A sharing access point (AP) sends a first frame to a first station (STA) on a channel when a condition is met, to detect an interference resource unit, the channel is a channel on which the sharing AP and a first shared AP perform coordinated transmission. The sharing AP is a serving AP of a first STA. The first frame indicates the first STA to use a first resource unit when replying to the first frame. The interference resource unit is the first resource unit on which the reply from the first STA is not received.