Abstract: Embodiments of this application provides a multi-link synchronous transmission method and apparatus. The method includes: The transmit MLD sends a first transmission frame to the receive MLD at a first moment on the first link when a first condition is met. The first moment is determined based on a second moment and/or a third moment, the second moment is a moment at which a backoff counter of the first link decreases to 0, and the third moment is a sending moment of a second transmission frame on the second link. The first condition includes: (1) The backoff counter of the first link is 0, and (2) the second transmission frame is located in a transmission opportunity TXOP on the second link.

Abstract: Embodiments of this application relate to a multi-link communication method, a traffic-to-link mapping method, and a device. An example method includes a first multi-link device receiving a message from a second multi-link device, wherein the message carries traffic-to-link mapping information. The example method further includes the first multi-link device establishing or updating a traffic-to-link mapping relationship based on the traffic-to-link mapping information.

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.

Abstract: A communication method and apparatus are disclosed, and relate to the field of communication technologies. One type of radio frame is provided to meet different use requirements for a time resource in a plurality of application scenarios, so that the radio frame is universal. The communication method includes: A first device generates a first frame. The first frame includes a first field and a second field. The first field indicates a duration of a first time resource. The second field indicates a purpose of the first time resource. The purpose of the first time resource includes: The first time resource is used to transmit a single-user PPDU, or the first time resource is used to perform frame exchange. The first device sends the first frame to a second device.

Abstract: This application relates to the wireless communication field, and to critical BSS parameter management method applicable to multiple links and a related apparatus which are applied to, for example, a wireless local area network supporting the 802.11be standard. The method includes: A first AP in a first AP MLD generates and sends a first frame, where the first frame indicates critical BSS parameter update count values corresponding to a plurality of APs in the first AP MLD and critical BSS parameter update count values corresponding to a plurality of APs in a second AP MLD, and the second AP MLD is an AP MLD to which a nontransmitted AP belongs in a multiple BSSID set including the first AP.

Abstract: This application relates to the wireless communication field, and in particular, to critical basic service set (BSS) parameter management method applicable to multiple links and a related apparatus that are applied to, for example, a wireless local area network supporting the 802.11be standard. A first access point (AP) in a first access point multi-link device (AP MLD) generates and sends a first frame, where the first frame indicates critical BSS parameter update count values corresponding to a plurality of APs in the first AP MLD and critical BSS parameter update count values corresponding to a plurality of APs in a second AP MLD, and the second AP MLD is an AP MLD to which a nontransmitted AP belongs in a multiple basic service set identifier (BSSID) set including the first AP.

Abstract: This application provides a channel contention method and a related apparatus. The method includes: After data transmission on a first link is completed or a block acknowledgment corresponding to data is received on the first link, a first non-access point station of a first multi-link device performs clear channel assessment CCA detection on a second link in a first time period, where a start moment corresponding to the first time period is the same as a moment at which the data transmission on the first link is completed; and when the CCA detection on the second link fails, the first non-access point station performs channel contention on the second link based on a second time period.

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: 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 bandwidth mode indication method and apparatus are provided, and relate to the field of communication technologies. The method includes: A transmit end sends a first frame to a receive end, where the first frame includes a service field, the service field includes a first field, the first field indicates whether a bandwidth mode indication field carried in the first frame is allowed to indicate a target bandwidth mode, and the target bandwidth mode includes one or more of bandwidth modes other than 20 MHz, 40 MHz, 80 MHz, and 80+80 MHz or 160 MHz.

Abstract: A data scheduling method and apparatus. The method includes: allocating, by an access point (AP), at least one of a plurality of primary channels to each of a plurality of stations (STAs), where active access is forbidden on the plurality of primary channels; and synchronously scheduling, by the AP, a STA on a channel including at least one idle primary channel, where the synchronously scheduled STA is a STA allocated to the at least one idle primary channel, and the at least one idle primary channel is at least one of the plurality of primary channels. The AP sets the plurality of primary channels, so that the AP can flexibly schedule the station by using the idle primary channel. This avoids a problem caused by setting only one primary channel, thereby improving data transmission efficiency.

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 joint transmission method includes sending, using a first access point (AP), a buffer indication to a second AP instructing the second AP to buffer first data, sending the first data to a station (STA), receiving a response frame from the STA, determining, based on the response frame, whether a joint transmission procedure needs to be initiated, sending a joint transmission indication to a third AP in response to determining to initiate the joint transmission procedure, where the joint transmission indication instructs the third AP to send second data to the STA, where the second data comprises all or a part of the first data, and where the third AP is the second AP, and sending the second data.

Abstract: The present disclosure provides an information transmission method, an information transmission device, a communication device and a readable storage medium. The information transmission method includes: obtaining OAM information from an optical network; encapsulating the obtained OAM information to form an OAM frame, the OAM frame including N data frames each having a frame length of L, N varying along with a volume of the OAM information, L being a constant value regardless of the volume of the OAM information; and transmitting the OAM frame. The OAM information is transmitted in a length-constant frame, so it is able to facilitate encoding and decoding of a message, simplifying the processing and reduce the time consumption, and facilitate the extension in accordance with a message content and ensure the extendibility, thereby to solve such problems as complicated processing, being time-consuming, and poor extendibility in the conventional OAM information transmission scheme.

Abstract: A first station in a first multi-link device generates a frame, wherein the frame indicates a maximum quantity of shared spatial streams supported by the first multi-link device. The first station sends the frame. A throughput of a station in a multi-link device is improved by enabling a station to use more spatial streams.

Abstract: An ML entity senses a first PPDU on a first fink; and if the first PPDU is an intra-BSS PPDU, and a value of a duration field of the first PPDU is greater than a value of a target NAV of a second link, the ML entity updates the value of the target NAV of the second link to the value of the duration field of the first PPDU, where the second link is any one of a plurality of links supported by the ML entity other than the first link.

Abstract: The present invention discloses a method and an apparatus for indicating a channel in a wireless local area network WLAN. A sending station generates and sends a physical protocol data unit PPDU, the PPDU includes a preamble field and a data field, a high efficiency signal field HE-SIG-A of the preamble field includes a bandwidth identifier and a channel bonding identifier, and the channel bonding identifier is used to indicate whether a data transmission channel is continuous in a frequency domain. In the foregoing manner, a discontinuous channel in a frequency domain in a wireless local area network is indicated, an available channel for data transmission is improved, and a system throughput is increased.

Abstract: This application relates to the wireless communication field, and in particular, to critical basic service set (BSS) parameter management methods and apparatus applicable to multiple links, for example, in a wireless local area network supporting the 802.11 be standard. In an example method includes, a first access point (AP) in a first access point multi-link device (AP MLD) generates and sends a first frame. The first frame indicates critical BSS parameter update count values corresponding to a plurality of APs in the first AP MLD and critical BSS parameter update count values corresponding to a plurality of APs in a second AP MLD. The second AP MLD is an AP MLD to which a nontransmitted AP belongs. The nontransmitted AP is in a multiple basic service set identifier (BSSID) set including the first AP.

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: A link error recovery method applied to a transmitter MLD is provided. Links between the transmitter MLD and a receiver MLD include a first link and a second link, and one of the transmitter MLD and the receiver MLD has an STR capability while the other does not have the STR capability. The method includes: determining that transmission of a first PPDU on the first link fails; and transmitting a second PPDU to the receiver MLD at a first moment by using the first link, the second PPDU being used to retransmit an error part in the first PPDU. The first moment is a moment at which the transmitter MLD obtains transmission status information of the second link. Alternatively, the first moment is a moment for transmitting a next PPDU on the first link if the first PPDU is normally transmitted.