Abstract: An access point, AP, (110) configured to communicate with a non-AP station (120) in a wireless local area network, WLAN (130). The AP (110) comprises a processing circuitry (111) configured to generate a nonce and a communication interface (113) configured to transmit a first message to the non-AP station (120). The first message (202) comprises the nonce. In response to receiving a second message from the non-AP station (120), the processing circuitry (111) is further configured to encrypt information about one or more policies. The information about the one or more policies identifies one or more policies to be applied by the non-AP station (120). The communication interface (113) is further configured to transmit a third message to the non-AP station (120). The third message comprises the encrypted information about the one or more policies.

Abstract: This application provides a spatial reuse method and apparatus based on multi-access point (AP) coordination, and a system. In the method, a first access point AP sends a radio frame including identification information to a second access point AP. The identification information is used to indicate the second access point AP to perform spatial reuse during uplink data transmission performed by at least one first station associated with the first access point. The second access point sends a downlink frame to at least one second station based on the identification information. Through coordination between access points APs, the first AP may configure a spatial reuse transmission opportunity for another specific AP to perform spatial reuse transmission, so that a transmission time in the spatial reuse transmission opportunity is fully used, thereby avoiding a conflict and improving transmission efficiency.

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 frequency at which 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 frequency at which 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: 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 multi-link communication method, an apparatus, and a system that relate to the field of communication technologies, to resolve a technical problem in conventional multi-link communication that an amount of information sent by a multi-link device to a peer multi-link device is large, a process in which the peer multi-link device determines, based on the information, a link that can support simultaneous data sending and receiving as a link that is receiving data is cumbersome, and processing load of the peer multi-link device is heavy. The method includes: generating link grouping information, where the link grouping meets a following characteristic: links belonging to different link groups support simultaneous data sending and receiving; and sending the link grouping information.

Abstract: This application provides a communication method and apparatus, and relates to the field of communication technologies. 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 provides methods and apparatus for sending feedback information. By binding a BAR-BA feedback manner, that is, first a request and then a feedback, when it is determined that data retransmission is performed by using a hybrid automatic repeat request (HARQ) mechanism, duration of an acknowledgment operation performed by a data receive end on retransmitted data may be increased. Alternatively, the receive end estimates duration required for feeding back a receiving status of the retransmitted data, and feeds back the duration to a transmit end. The transmit end may therefore adaptively adjust duration of the retransmitted data based on a feedback capability of the receive end, to ensure that the feedback of the receive end on the receiving status of the retransmitted data is within a short inter-frame space (SIFS).

Abstract: A coordinated multi-access-point transmission method, where a first access point (AP) sends, to a second AP, transmission control information that carries link transmission direction information, and the first AP and the second AP pre-coordinate a transmission direction of a first link and a transmission direction of a second link, where concurrent transmission is performed on the first link and the second link. Further, the first AP completes data transmission on the first link based on the transmission control information, and the second AP completes data transmission on the second link based on the transmission control information.

Abstract: A STA in a STA MLD sends an information frame on a link corresponding to the station, and the information frame is used to indicate a STA in an awake state in the STA MLD. An AP MLD receives the information frame, and sends a downlink message frame on a one or more links corresponding to a part of or all of STAs in the awake state in the STA MLD.

Abstract: A communication method includes an access point (AP) multi-link device (MLD) that generates first signaling via an affiliated AP affiliated to the AP MLD, where the first signaling indicates a mapping relationship between a traffic identifier and a link, and the mapping relationship indicated by the first signaling periodically takes effect; and the AP MLD sends, via the affiliated AP, the first signaling to a non-AP MLD associated with the AP MLD. The mapping relationship indicated by the sent first signaling periodically takes effect.

Abstract: A method and device for uplink orthogonal frequency division multiple access random access, the method including receiving, by a station (STA), a first trigger frame sent by an access point AP, the STA supporting n resource units RUs, where n>1 and is an integer, the first trigger frame including information used to determine a number k of random access resource units (RA-RUs) allocated by the AP, where k is an integer >0, and setting, by the STA, in response to the STA determining that a first parameter is greater than or equal to a value of an orthogonal frequency division multiple access (OFDMA) random access backoff (OBO) counter, the value of the OBO counter to 0, and randomly selecting, by the STA, i RA-RUs from the k RA-RUs to send uplink data, where i?n, and where the first parameter is associated with k.

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: 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: This application provides a communication method and a communication apparatus. In one example, a first physical layer protocol data unit (PPDU) is sent over a first link, where the first PPDU carries a trigger frame. A second PPDU is sent over a second link. 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, and the second time is related to the end time of sending the first PPDU and a short interframe space (SIFS) time.

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: 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 describe a communication method, a first station (STA), a second STA, and an access point (AP). One example method includes: setting, by a first station (STA), a basic service set (BSS) color to be used by a second STA in a device-to-device (D2D) transmission with the first STA, wherein the first STA sets the BSS color to be a first color that is preconfigured for D2D transmission, wherein the first color is different from a second color allocated by an access point (AP) associated with the first STA for transmission with the AP, and wherein the first color is used for D2D transmissions between the first STA and other STAs in addition to the first color being used for D2D transmission between the first STA and the second STA; generating, by the first STA, a data frame that comprises the BSS color that is the first color; and sending, by the first STA, the data frame to the second STA in the D2D transmission.

Abstract: This application relates to the communication field, and in particular, to a communication method and apparatus applicable to a multi-link device. The approach generates, by a first access point (AP) of a first access point multi-link device (AP MLD), first information that indicates whether a key basic service set (BSS) parameter corresponding to at least one AP of the first AP MLD changes. In turn, the first AP sends the first information to a first station multi-link device (STA MLD).

Abstract: The present invention relates to a humidity detection-based pellet grill control method and a feeding system of a pellet grill, where the pellet grill is energized so that the feeding system thereof and a humidity sensor on the feeding system are in an energized state; and the humidity sensor is used to continuously monitor humidity of a fuel conveying channel of the feeding system in which a pellet fuel has been stored, so that a controller determines humidity level of a space environment or the pellet fuel in the fuel conveying channel. This can prevent the fuel that has become powdered due to moisture from drying into hard lumps again in the fuel conveying channel which can result in blockage of a screw conveyor, thus protecting the feeding system and reducing maintenance costs.

Abstract: A communication method includes determining a ranging signal, sending an nth fragment of N fragments of the ranging signal in a first time unit, and sending an (n+1)th fragment in a second time unit. The first time unit is one of M time units included in an nth time period, and the second time unit is one of M time units included in an (n+1)th time period, where there is a preset interval between the nth time period and the (n+1)th time period, n is an integer greater than 0 and less than N, and both N and M are integers greater than 1.