Abstract: Various embodiments provide a data transmission method and apparatus. In those embodiments, a first device sends first indication information in a first frequency band, where the first indication information is indicative of a resource in a second frequency band, used by the first device and the second device to perform data transmission. In those embodiments, the first device performs, based on the scheduling information, data transmission with the second device, using the resource in the second frequency band. Those embodiments can schedule a device based on a plurality of frequency bands to perform data transmission. In this way, a larger bandwidth is used, a throughput rate is increased, and system performance is improved.

Abstract: This application discloses a multi-link device probing method and a communication apparatus, which may be applied to a wireless local area network supporting the 802.11be standard. The method includes: A first access point (AP) receives a probe request frame that comprises a multi-link element, where the multi-link element is used to indicate a first access appoint (AP) to feed back information of an AP in the AP multi-link device; determines whether a link identifier field for indicating a link of an AP in the AP multi-link device is present in the multi-link element, wherein absence of the link identifier field indicates that information is requested for all APs in the AP multi-link device; and sends a probe response frame based on the determination.

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: A multi-link communication method and an apparatus are disclosed. A transmit end sends a radio frame. Correspondingly, a receive end receives the radio frame, and parses the radio frame. The radio frame includes a first element and a second element. The first element includes an expected duration field. The expected duration field may be determined based on a most recent TBTT or TU boundary before a transmission time of the radio frame, or may be determined based on a TSF timer. This can ensure that an expected end time of a mapping relationship of the first element is the same as a time at which a mapping relationship of the second element is established.

Abstract: Embodiments of this application relates to a multi-link communication setup method and a related apparatus. The method includes: a non-AP MLD sends an association request frame on a first link, to request multi-link setup. An AP MLD returns an association response frame on the first link, to notify whether multi-link setup succeeds. The AP MLD sets a second status code field of a multi-link element of the association response frame to a newly defined value, to indicate that a cause why a link is not accepted is that the first link is not accepted. This application is applied to a WLAN system that supports a next generation Wi-Fi protocol of 802.11ax, for example, 802.11be, Wi-Fi 7, or EHT, and other 802.11 series protocols; and for another example, a next generation protocol of 802.11be: Wi-Fi 8.

Abstract: This application relates to a multi-link device communication method and a communication device. According to the method, the station multi-link device and the access point multi-link device can determine, for a plurality of established links, which links can be woken up in the WUR mode, so that the access point multi-link device can flexibly wake up a specific link in the station multi-link device, thereby reducing power consumption for the station multi-link device.

Abstract: This application discloses a D2D transmission method and a communication apparatus. The method includes: A station receives a trigger frame sent by an access point, where the trigger frame includes a user information field, the user information field includes an identifier of a station, resource allocation information, first indication information, and second indication information, the first indication information indicates that a resource unit indicated by the resource allocation information is used for device-to-device D2D transmission, and the second indication information indicates that the station is a sender or a receiver of the D2D transmission; and the station performs the D2D transmission on the resource unit indicated by the resource allocation information. According to the method described in this application, D2D transmission can be implemented in a Wi-Fi system.

Abstract: In an information transmission method, a sending device sends a data frame to a receiving device. The data frame occupies a transmission resource block, a bandwidth occupied by the transmission resource block is greater than 160 MHz, and the data frame comprises resource unit (RU) allocation information. The sending device determines indication information based on a resource block size indicated by the RU allocation information and a location of a 160 MHz channel within the bandwidth occupied by the transmission resource block, with the 160 MHz channel having more data tones in the transmission resource block. The sending device determines a response resource block based on the indication information and the RU allocation information, and then receives an acknowledgment frame for the data frame from the receiving device on the response resource block.

Abstract: This application provides a communications method and a communications apparatus. A first station in a first multi-link device sends first information to a second multi-link device, where the first information is used to indicate a how often a station in a power saving mode in the first multi-link device receives a beacon frame. In this way, the second multi-link device may learn about, based on the first information, how often a station in the first multi-link device receives a beacon frame, thereby helping the second multi-link device effectively manage a cache service of each station in the first multi-link device and manage a data buffer space.

Abstract: This application provides a communication method and apparatus, and relates to the field of communication technologies. The method includes: An AP generates a trigger frame, where the trigger frame includes a first user information field, a part or all of a frequency domain resource indicated by a resource unit allocation subfield in a fourth user information field before the first user information field is located on a primary 160 MHz channel, and a part or all of a frequency domain resource indicated by a resource unit allocation subfield in a fourth user information field after the first user information field is located on a secondary 160 MHz channel. Then, the AP sends the trigger frame.

Abstract: This application discloses methods and apparatuses applicable to multiple links, for example, in a wireless local area network supporting an 802.11be standard. In an example, a first station (STA) of a first non-access-point multi-link device (non-AP MLD) receives individually addressed traffic indication information that indicates whether the first non-AP MLD associated with a first access point multi-link device (AP MLD) has a downlink individually addressed traffic and whether a second non-AP MLD associated with a second AP MLD has a downlink individually addressed traffic. The second AP MLD is an AP MLD to which a non-transmitted AP belongs, and the non-transmitted AP is in a multiple basic service set identifier (BSSID) set in which the first AP is located. The first STA determines whether the first non-AP MLD has a downlink individually addressed traffic according to the individually addressed traffic indication information.

Abstract: A multi-link communication method includes a station multi-link device that wakes up, based on a radio frame sent by an access point multi-link device, at least one affiliated station of the station multi-link device. All affiliated stations of the station multi-link device are in a doze state before the radio frame is received.

Abstract: The present disclosure relates to methods applicable to a wireless local area network system that supports a next-generation Wi-Fi protocol of IEEE 802.11ax (for example, the 802.11be protocol), a next-generation Wi-Fi protocol of 802.11be, a UWB technology-based wireless personal area network system, and a sensing system. In one example method, after receiving a trigger frame from a first network device, a terminal device determines a NAV indicating a channel status is busy, and the NAV is set by a first AP. The terminal device performs uplink transmission with the first network device when a preset condition is met, where the first AP shares a transmission opportunity with the first network device. The terminal device ignores the NAV set by the first AP, and performs uplink transmission by using the transmission opportunity shared by the first AP.

Abstract: Embodiments provide a multi-link communication method and a related apparatus. A first station generates a radio frame, where the first station is one of a plurality of stations included in a first multi-link device. The first multi-link device includes a first station operating on a first link and a second station operating on a second link. The first station transmits the radio frame on the first link, where the radio frame includes capability indication information, and the capability indication information indicates whether the first station and the second station support simultaneous transmitting/receiving operations. According to the embodiments of this application, communication quality can be ensured.

Abstract: Example channel access methods and apparatus are described. One example method includes performing first channel contention by a multi-link device on a first link, where an initial value of a backoff counter in the first channel contention is determined based on a first value of a contention window. The multi-link device may perform second channel contention on the first link when a value of the backoff counter becomes 0 in the first channel contention and when the multi-link device does not perform transmission on the first link. An initial value of the backoff counter in the second channel contention is determined based on a second value of the contention window, and the second value is equal to the first value or a minimum value of the contention window.

Abstract: A channel contention method includes performing, by a first station and a second station of a multi-link device (MLD), channel contention based on a first enhanced distributed channel access (EDCA) parameter; generating, by the first station and the second station, a point coordination function (PCF) inter-frame space (PIFS) access t imer when the first station performs EDCA access and the second station performs PIFS access; and performing, by the first station and the second station, channel contention based on a second EDCA parameter before the PIFS access timer backs off to 0.

Abstract: This application provides communication methods, apparatuses, and computer-readable storage media. In an example, a value of a specific element of a first access point (AP) (or a second AP) is reused in a management frame, to indicate specific elements of a plurality of APs in a multiple basic service set identifier (BSSID) set to which the first AP (or the second AP) belongs. The management frame does not need to carry a plurality of same specific elements in the multiple BSSID set. The described techniques can be applied to, for example, a wireless local area network system supporting IEEE 802.11ax next-generation Wi-Fi protocols, for example, 802.11 series protocols such as the 802.11be or the EHT.

Abstract: A method for determining a receiving status of a data frame and a first multi-link device. The method includes sending data frames to a second multi-link device over multiple links; receiving, over a first link in the multiple links, a block acknowledgment (BA) frame, where a bitmap in the BA frame indicates a receiving status of a data frame transmitted over the first link and indicates a receiving status of a data frame transmitted over a second link in the multiple links, and determining, based on a first time and a second time, a receiving status of a data frame corresponding to a first bit.

Abstract: This disclosure provides methods for modifying a block acknowledgment (BA) protocol parameter. One example method includes a first device that receives a multi-traffic identifier (multi-TID) BA setup request frame comprising multiple pieces of BA protocol identification information from a second device, where the multi-TID BA setup request frame is used to set up parameter information of multiple BA protocols identified by the multiple pieces of BA protocol identification information. The first device sends a multi-TID BA setup response frame to the second device, where the multi-TID BA setup response frame is used to respond to the multi-TID BA setup request frame.

Abstract: Embodiments of this application provide example communication methods and apparatuses, which may be applied to a WLAN system that supports IEEE 802.11 series protocols such as 802.11be/Wi-Fi 7/EHT, Wi-Fi 8, or a next-generation protocol of Wi-Fi 8. One example method includes determining a first start time of a target wake time (TWT) service period (SP) (TWT SP) based on a value of a TWT field and a TWT wake interval in a first beacon frame; and rounding the first start time to obtain a second start time.