WO2022247900A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2022247900A1
WO2022247900A1 PCT/CN2022/095191 CN2022095191W WO2022247900A1 WO 2022247900 A1 WO2022247900 A1 WO 2022247900A1 CN 2022095191 W CN2022095191 W CN 2022095191W WO 2022247900 A1 WO2022247900 A1 WO 2022247900A1
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Prior art keywords
channel change
sta
information
channel
link device
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PCT/CN2022/095191
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English (en)
French (fr)
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淦明
宫博
陆雨昕
于健
李云波
狐梦实
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0241—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where no transmission is received, e.g. out of range of the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/085—Retrieval of network configuration; Tracking network configuration history
    • H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • a multi-link device that can support parallel communication of multiple links
  • the multi-link device can include one or more A station, when the station is an access point (access point, AP), the multi-link device can be called an AP multi-link device; when the station is a non-access point station (non-access point station, non-AP STA) , the non-AP STA can also be briefly referred to as STA, and the multi-link device can also be called STA multi-link device.
  • the AP whose BSSID is the transmission BSSID is called a transmission AP
  • the AP whose BSSID is a non-transmission BSSID is called a non-transmission AP.
  • the STA associated with an AP in the AP multi-link device is in a dormant state, and the STA belongs to a non-AP multi-link device, and the AP is undergoing a channel change (at this time, the AP is in its working
  • the beacon frame sent on the link carries elements related to the channel change; if the AP is an AP that does not transmit the BSSID in the multi-BSSID set, the beacon frame sent by the corresponding transmitting AP carries the channel change of the AP Related elements), other APs from the same AP multi-link device (if the AP is a non-transmitting BSSID AP in the multi-BSSID set, then the other AP is a transmitting AP in its multi-BSSID set) can use the
  • the elements related to the channel change of the AP are carried in the management frame, and the STA (belonging to the same non-AP multi-link device) associated with the other AP will know that the channel change of the AP is occurring
  • the AP has completed the channel change before other APs belonging to the same AP multi-link device send the management frame, the other AP (or it can also be described as the reporting AP) will not carry the channel change of the AP
  • the relevant elements that is, the above-mentioned non-AP multi-link device cannot know that the AP has undergone a channel change.
  • the embodiment of the present application provides a communication method and device, which can improve that if an AP has completed the channel change before the transmitting AP sends the management frame, the transmitting AP will not carry the parameter element of the AP, resulting in The STA associated with the AP cannot know that the AP has a technical problem of channel change.
  • the embodiment of the present application provides a communication method, the method includes: a first access point AP generates a management frame; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information It is used to indicate whether other APs in the first AP multi-link device have changed channels; the first AP multi-link device includes the first AP; and the first AP sends a management frame to the first station STA.
  • the first AP when the first AP sends the management frame, by carrying the first indication information, it can indicate whether other APs in the multi-link device of the first AP have changed channels, so that the channel associated with the first AP belongs to the non-
  • the first STA of the AP MLD determines, according to the first indication information, whether other APs in the first AP multi-link device have undergone a channel change, and if so, obtains the channel change information of the AP that has undergone a channel change, so that The STA (even if the STA is in the dormant state) associated with the AP associated with the channel change and belonging to the same non-AP MLD knows that the channel change has occurred in the AP associated with it, and the channel change information after the channel change occurs.
  • the capability information field also includes a first key parameter update flag signaling; where the first key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the first AP multi-link device Change occurs; when the management frame sent by the AP in the first AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the first AP multi-link device does not include elements related to channel change, the first The value of the key parameter update flag signaling remains unchanged.
  • the management frame sent by the AP includes elements related to channel change, it will not cause the value of the key parameter update value of the AP to change. Whether the management frame includes elements related to channel change will not cause the value of the first key parameter update flag signaling to change.
  • the first AP adjusts the update value of the key parameter of the AP.
  • the key BSS parameter event includes at least one of the following events: modifying the enhanced distributed channel access EDCA parameter element, modifying the direct sequence spread spectrum DSSS parameter set element, modifying the high throughput HT operation element, Includes wide bandwidth channel change elements, includes wide bandwidth channel change envelope elements, includes operating mode notification elements, modifies extremely high throughput VHT operating elements, modifies high-efficiency HE operating elements, inserts broadcast target wake-up time TWT elements, includes BSS color changes Notification element, modification of multi-user MU EDCA parameter set element, modification of spatial multiplexing parameter set element, modification of extremely high throughput EHT operation element.
  • the key BSS parameter event does not include any event in the following events: including channel change notification element, including extended channel change notification element, including static element, including static channel element.
  • the STA multi-link device associated with an AP multi-link device obtains the elements related to the channel change of the repeated AP according to the RNR element and the multi-link element in the management frame, thereby reducing the power consumption of the STA multi-link device and saving the air interface Transmission opportunities.
  • the management frame further includes a non-transmission basic service set identifier BSSID field, and the non-transmission BSSID field includes second indication information; where the second indication information is used to indicate whether there are other The channel of the AP has changed, and at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the non-transmission BSSID field is located in the non-transmission BSSID capability element in the non-transmission BSSID summary sub-element of the Multiple BSSID element, and the non-transmission BSSID field can also be called the non-transmission BSSID capability field, or other names.
  • the first AP when the first AP sends a management frame, by carrying the second indication information, it can indicate whether other APs in the second AP multi-link device have changed channels, so that the channel associated with the first AP belongs to the non -
  • the first STA of the AP MLD determines whether there are other APs in the second AP multi-link device that have undergone a channel change according to the second indication information, and if so, obtains the channel change information of the AP that has undergone a channel change, so as to make the same
  • the STA (even if the STA is in the dormant state) associated with the AP associated with the channel change and belonging to the same non-AP MLD knows that the channel change has occurred in the associated AP and the channel change information after the channel change occurs.
  • the non-transmission BSSID field includes the second key parameter update flag signaling; wherein, the second key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the second AP multi-link device change; when the management frame sent by the AP in the second AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the second AP multi-link device does not include elements related to channel change, the second The value of the key parameter update flag command remains unchanged.
  • the management frame sent by the AP includes elements related to channel change, it will not cause the value of the key parameter update value of the AP to change. Whether the management frame includes elements related to channel change will not cause the value of the second key parameter update flag signaling to change.
  • the first AP adjusts the update value of the key parameter of the AP.
  • the STA multi-link device associated with the multi-link device obtains the elements related to the channel change of the repeated AP, thereby reducing the power consumption of the STA multi-link device and saving air interface transmission opportunities .
  • the embodiment of the present application provides a first AP.
  • the first AP can realize the functions performed by the first AP in the first aspect or the possible design of the first aspect.
  • the functions can be executed by hardware.
  • the hardware or software includes one or more modules with corresponding functions above. For example, processing module and transceiver module.
  • a processing module configured to generate a management frame; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information is used to indicate whether other APs in the first AP multi-link device have undergone channel changes ;
  • the first AP multi-link device includes a first AP; a transceiver module, configured to send a management frame to the first station STA.
  • the capability information field also includes a first key parameter update flag signaling; where the first key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the first AP multi-link device Change occurs; when the management frame sent by the AP in the first AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the first AP multi-link device does not include elements related to channel change, the first The value of the key parameter update flag signaling remains unchanged.
  • the processing module is also used to adjust the update value of the key parameter of the AP when any event in the key basic service set BSS parameter event corresponding to the AP in the first AP multi-link device occurs. value.
  • the key BSS parameter event includes at least one of the following events: modifying the enhanced distributed channel access EDCA parameter element, modifying the direct sequence spread spectrum DSSS parameter set element, modifying the high throughput HT operation element, Includes wide bandwidth channel change elements, includes wide bandwidth channel change envelope elements, includes operating mode notification elements, modifies extremely high throughput VHT operating elements, modifies high-efficiency HE operating elements, inserts broadcast target wake-up time TWT elements, includes BSS color changes Notification element, modification of multi-user MU EDCA parameter set element, modification of spatial multiplexing parameter set element, modification of extremely high throughput EHT operation element.
  • the key BSS parameter event does not include any event in the following events: including channel change notification element, including extended channel change notification element, including static element, including static channel element.
  • the management frame further includes a non-transmission basic service set identifier BSSID field, and the non-transmission BSSID field includes second indication information; where the second indication information is used to indicate whether there are other The channel of the AP has changed, and at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the non-transmission BSSID field includes the second key parameter update flag signaling; wherein, the second key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the second AP multi-link device change; when the management frame sent by the AP in the second AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the second AP multi-link device does not include elements related to channel change, the second The value of the key parameter update flag command remains unchanged.
  • the processing module is further configured to adjust the update value of the key parameter of the AP when any event in the key BSS parameter events corresponding to the AP in the second AP multi-link device occurs.
  • the specific implementation manner of the first AP in the second aspect may refer to the behavior function of the first AP in the communication method provided by the first aspect or any possible design of the first aspect.
  • the embodiment of the present application provides a first AP, where the first AP may be the first AP or a chip or a system on chip in the first AP.
  • the first AP may implement the above aspects or functions performed by the first AP in each possible design, and the functions may be implemented by hardware.
  • the first AP may include: a processor and a transceiver. The processor and the transceiver may be used to support the first AP to implement the functions involved in the first aspect or any possible design of the first aspect.
  • the processor can be used to generate a management frame; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information is used to indicate whether other APs in the first AP multi-link device have occurred Channel change; the first AP multi-link device includes the first AP; the transceiver can be used to send a management frame to the first station STA.
  • the first AP may further include a memory, and the memory is used for storing necessary computer-executable instructions and data of the first AP. When the first AP is running, the transceiver and processor execute the computer-executable instructions stored in the memory, so that the first AP executes the above-mentioned first aspect or any possible design of the first aspect. communication method.
  • the specific implementation manner of the first AP in the third aspect may refer to the behavior function of the first AP in the communication method provided by the first aspect or any possible design of the first aspect.
  • the embodiment of the present application provides a communication method, the method includes: the first station STA receives a management frame from the first access point AP; wherein, the management frame includes a capability information field, and the capability information field includes the first Indication information; the first indication information is used to indicate whether other APs in the first AP multi-link device have changed channels; the first AP multi-link device includes the first AP; the STA multi-link device includes the first STA; when The first indication information is used to indicate that other APs in the first AP multi-link device have undergone a channel change, and the first STA obtains the channel change information of the AP after the channel change occurs, so that the STA multi-link device and the channel change occur The STA associated with the subsequent AP obtains channel change information.
  • the first AP when the first AP sends the management frame, by carrying the first indication information, it can indicate whether other APs in the multi-link device of the first AP have changed channels, so that the channel associated with the first AP belongs to the non-
  • the first STA of the AP MLD determines whether there are other APs in the first AP multi-link device that have undergone a channel change according to the first indication information, and if so, obtains the channel change information of the AP that has undergone a channel change, so that The STA (even if the STA is in the dormant state) associated with the AP associated with the channel change and belonging to the same non-AP MLD knows that the channel change has occurred in the AP associated with it, and the channel change information after the channel change occurs.
  • the capability information field also includes a first key parameter update flag signaling; where the first key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the first AP multi-link device Change occurs; when the management frame sent by the AP in the first AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the first AP multi-link device does not include elements related to channel change, the first The value of the key parameter update flag signaling remains unchanged.
  • the management frame sent by the AP includes elements related to channel change, it will not cause the value of the key parameter update value of the AP to change. Whether the management frame includes elements related to channel change will not cause the value of the first key parameter update flag signaling to change.
  • the value of the key parameter update value of the AP in the first AP multi-link device is adjusted according to the occurrence of any event in the key basic service set BSS parameter event corresponding to the AP.
  • the key BSS parameter event includes at least one of the following events: modifying the enhanced distributed channel access EDCA parameter element, modifying the direct sequence spread spectrum DSSS parameter set element, modifying the high throughput HT operation element, Includes wide bandwidth channel change elements, includes wide bandwidth channel change envelope elements, includes operating mode notification elements, modifies extremely high throughput VHT operating elements, modifies high-efficiency HE operating elements, inserts broadcast target wake-up time TWT elements, includes BSS color changes Notification element, modification of multi-user MU EDCA parameter set element, modification of spatial multiplexing parameter set element, modification of extremely high throughput EHT operation element.
  • the key BSS parameter event does not include any event in the following events: including channel change notification element, including extended channel change notification element, including static element, including static channel element.
  • the STA multi-link device associated with an AP multi-link device obtains the elements related to the channel change of the repeated AP according to the RNR element and the multi-link element in the management frame, thereby reducing the power consumption of the STA multi-link device and saving the air interface Transmission opportunities.
  • the management frame further includes a non-transmission basic service set identifier BSSID field, and the non-transmission BSSID field includes second indication information; where the second indication information is used to indicate whether there are other The channel of the AP has changed, and at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the first STA obtains the channel change information of the AP after the channel change, so that the STA multi-link In the device, the STA associated with the AP after the channel change obtains the channel change information.
  • the first AP when the first AP sends a management frame, by carrying the second indication information, it can indicate whether other APs in the second AP multi-link device have changed channels, so that the subordinates associated with the first AP
  • the first STA in the non-AP MLD determines whether there are other APs in the second AP multi-link device that have undergone a channel change according to the second indication information, and if so, obtains the channel change information of the AP that has undergone a channel change, so that The STA (even if the STA is in the dormant state) associated with the AP that has undergone a channel change and that belongs to the same non-AP MLD knows that the associated AP has undergone a channel change and the channel change information after the channel change occurs.
  • the non-transmission BSSID field includes the second key parameter update flag signaling; wherein, the second key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the second AP multi-link device change; when the management frame sent by A in the second AP multi-link device includes elements related to channel change, or, when the management frame sent by AP in the second AP multi-link device does not include elements related to channel change, the second The value of the key parameter update flag command remains unchanged.
  • the management frame sent by the AP includes elements related to channel change, it will not cause the value of the key parameter update value of the AP to change. Whether the management frame includes elements related to channel change will not cause the value of the second key parameter update flag signaling to change.
  • the value of the key parameter update value of the AP in the second AP multi-link device is adjusted according to the occurrence of any event in the key BSS parameter events corresponding to the AP.
  • the STA multi-link device associated with the multi-link device obtains the elements related to the channel change of the repeated AP, thereby reducing the power consumption of the STA multi-link device and saving air interface transmission opportunities .
  • the embodiment of the present application provides a first STA.
  • the first STA can realize the functions performed by the first STA in the fourth aspect or the possible design of the fourth aspect, and the functions can be executed by hardware.
  • Software Implementation The hardware or software includes one or more modules with corresponding functions above. For example, transceiver module and processing module.
  • a transceiver module configured to receive a management frame from the first access point AP; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information is used to indicate that the first AP multi-link device Whether other APs have changed channels; the first AP multi-link device includes the first AP; the STA multi-link device includes the first STA; when the first indication information is used to indicate that there are other APs in the first AP multi-link device The channel change has occurred, and the processing module is configured to obtain the channel change information of the AP after the channel change, so that in the STA multi-link device, the STA associated with the AP after the channel change obtains the channel change information.
  • the capability information field also includes a first key parameter update flag signaling; where the first key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the first AP multi-link device Change occurs; when the management frame sent by the AP in the first AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the first AP multi-link device does not include elements related to channel change, the first The value of the key parameter update flag signaling remains unchanged.
  • the value of the key parameter update value of the AP in the first AP multi-link device is adjusted according to the occurrence of any event in the key basic service set BSS parameter event corresponding to the AP.
  • the key BSS parameter event includes at least one of the following events: modifying the enhanced distributed channel access EDCA parameter element, modifying the direct sequence spread spectrum DSSS parameter set element, modifying the high throughput HT operation element, Includes wide bandwidth channel change elements, includes wide bandwidth channel change envelope elements, includes operating mode notification elements, modifies extremely high throughput VHT operating elements, modifies high-efficiency HE operating elements, inserts broadcast target wake-up time TWT elements, includes BSS color changes Notification element, modification of multi-user MU EDCA parameter set element, modification of spatial multiplexing parameter set element, modification of extremely high throughput EHT operation element.
  • the key BSS parameter event does not include any event in the following events: including channel change notification element, including extended channel change notification element, including static element, including static channel element.
  • the management frame further includes a non-transmission basic service set identifier BSSID field, and the non-transmission BSSID field includes second indication information; where the second indication information is used to indicate whether there are other The channel of the AP has changed, and at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the processing module when the second indication information is used to indicate that an AP in the second AP multi-link device has undergone a channel change, the processing module is also used to obtain the channel change information of the AP after the channel change occurs, so that the STA In the multi-link device, the STAs associated with the AP after the channel change obtains the channel change information.
  • the non-transmission BSSID field includes the second key parameter update flag signaling; wherein, the second key parameter update flag signaling is used to indicate whether there is an AP key parameter update value in the second AP multi-link device change; when the management frame sent by the AP in the second AP multi-link device includes elements related to channel change, or, when the management frame sent by the AP in the second AP multi-link device does not include elements related to channel change, the second The value of the key parameter update flag command remains unchanged.
  • the value of the key parameter update value of the AP in the second AP multi-link device is adjusted according to the occurrence of any event in the key BSS parameter events corresponding to the AP.
  • the embodiment of the present application provides a first STA, where the first STA may be the first STA or a chip or a system on chip in the first STA.
  • the first STA may implement the above aspects or functions performed by the first STA in each possible design, and the functions may be implemented by hardware.
  • the first STA may include: a transceiver and a processor. The transceiver and the processor may be used to support the first STA to implement the functions involved in the fourth aspect or any possible design of the fourth aspect.
  • the transceiver can be used to receive a management frame from the first access point AP; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information is used to indicate that the first AP multilink Whether other APs in the device have changed channels; the first AP multi-link device includes the first AP; the STA multi-link device includes the first STA; when the first indication information is used to indicate that the first AP multi-link device has Other APs have undergone a channel change, and the processor can be used to obtain channel change information of the AP after the channel change, so that in the STA multi-link device, the STA associated with the AP after the channel change obtains the channel change information.
  • the management frame includes a capability information field, and the capability information field includes first indication information
  • the first indication information is used to indicate that the first AP multilink Whether other APs in the device have changed channels
  • the first AP multi-link device includes the first AP
  • the first STA may further include a memory, and the memory is configured to store computer-executable instructions and data necessary for the first STA.
  • the transceiver and the processor execute the computer-executed instructions stored in the memory, so that the first STA executes the method described in the fourth aspect or any possible design of the fourth aspect communication method.
  • the specific implementation manner of the first STA in the sixth aspect may refer to the behavior function of the first STA in the communication method provided by the fourth aspect or any possible design of the fourth aspect.
  • the embodiment of the present application provides a communication method, the method includes: the first AP generates a management frame; wherein, when an AP in the first AP multi-link device undergoes a channel change, the management frame includes an ML element, ML The element includes the channel change information of the AP that has changed the channel, and continues until the next DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP; the first AP sends the first AP The station STA sends a management frame.
  • the first AP when the first AP sends the management frame, by carrying the channel change information in the ML element, it can indicate the channel change information of the AP that has changed the channel in the multi-link device of the first AP, so that it can be associated with the first AP
  • the first STA determines the channel change information of the AP that has undergone the channel change, so that the STAs associated with the AP that have undergone the channel change know that the channel change has occurred in the associated AP, and the channel change information after the channel change occurs .
  • the ML element when an AP in the second AP multi-link device has a channel change, the ML element also includes the channel change information of the AP that has had a channel change in the second AP multi-link device, and continues until the second AP multi-link device The next DTIM beacon frame sent by an AP; at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the first AP when it sends a management frame, it can also indicate the channel change information of the AP in the second AP multi-link device that has undergone a channel change, so that the first STA associated with the first AP can be determined according to the ML element
  • the channel change information of the AP that has undergone channel change so that the STAs associated with the AP that have undergone channel change know that the associated AP has undergone channel change and the channel change information after the channel change occurs.
  • the channel change information includes elements related to channel change; or, the channel change information includes the AP's changed operation set and channel number; or, the channel change information includes the AP's changed channel number.
  • the channel change information may include elements related to the channel change, and may also include the changed operation set and channel number of the AP, without limitation.
  • the management frame also includes a channel change count field; wherein, when the value of the channel change count field is the first value, the channel change count field is used to indicate that the channel change will be transmitted in the next beacon frame target Occurs immediately before the time; when the value of the channel change count field is the second value, the channel change count field is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the ML element carries the channel change information of the AP after the channel change occurs until the next DTIM beacon frame, so that the STA in the STA multi-link device can know the channel change information of the AP that has undergone the channel change.
  • the value of the channel change count field may be the second value, which is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the embodiment of the present application provides a first AP.
  • the first AP can realize the functions performed by the first AP in the seventh aspect or the possible design of the seventh aspect, and the functions can be executed by hardware.
  • Software Implementation The hardware or software includes one or more modules with corresponding functions above. For example, processing module and transceiver module.
  • the processing module is used to generate a management frame; wherein, when an AP in the first AP multi-link device has a channel change, the management frame includes an ML element, and the ML element includes channel change information of the AP whose channel has changed, and continues until The next transmission traffic indication map DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP; the transceiver module is used to send the management frame to the first station STA.
  • the ML element when an AP in the second AP multi-link device has a channel change, the ML element also includes the channel change information of the AP that has had a channel change in the second AP multi-link device, and continues until the second AP multi-link device The next DTIM beacon frame sent by an AP; at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the channel change information includes elements related to channel change; or, the channel change information includes the AP's changed operation set and channel number; or, the channel change information includes the AP's changed channel number.
  • the management frame also includes a channel change count field; wherein, when the value of the channel change count field is the first value, the channel change count field is used to indicate that the channel change will be transmitted in the next beacon frame target Occurs immediately before the time; when the value of the channel change count field is the second value, the channel change count field is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the embodiment of the present application provides a first AP, where the first AP may be the first AP or a chip or a system on chip in the first AP.
  • the first AP may implement the above aspects or functions performed by the first AP in each possible design, and the functions may be implemented by hardware.
  • the first AP may include: a processor and a transceiver.
  • the processor can be used to generate a management frame; wherein, when an AP in the first AP multi-link device has a channel change, the management frame includes an ML element, and the ML element includes channel change information of the AP whose channel has changed, and continues until The next transmission service indication map DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP; the transceiver can be used to send a management frame to the first station STA.
  • the first AP may further include a memory, and the memory is used for storing necessary computer-executable instructions and data of the first AP.
  • the transceiver and the processor execute the computer-executable instructions stored in the memory, so that the first AP executes the method described in the seventh aspect or any possible design of the seventh aspect. communication method.
  • the specific implementation manner of the first AP in the ninth aspect may refer to the behavior function of the first AP in the communication method provided by the seventh aspect or any possible design of the seventh aspect.
  • the embodiment of the present application provides a communication method, the method includes: a first station STA receives a management frame from a first access point AP; wherein, the management frame includes an ML element, and the ML element includes the first AP multiple The channel change information of the AP that has changed the channel in the link device, and continues until the first STA receives the next DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP The STA multi-link device includes a first STA; the first STA obtains channel change information according to the ML element, so that in the STA multi-link device, the STA associated with the AP after the channel change occurs obtains the channel change information.
  • the first AP when the first AP sends the management frame, by carrying the channel change information in the ML element, it can indicate the channel change information of the AP that has changed the channel in the multi-link device of the first AP, so that it can be associated with the first AP
  • the first STA determines the channel change information of the AP that has undergone the channel change, so that the STAs associated with the AP that have undergone the channel change know that the channel change has occurred in the associated AP, and the channel change information after the channel change occurs .
  • the ML element also includes the channel change information of the AP whose channel has changed in the second AP multi-link device, and continues until the first STA receives the next transmission traffic indication map DTIM sent by the first AP.
  • the first AP when it sends a management frame, it can also indicate the channel change information of the AP in the second AP multi-link device that has undergone a channel change, so that the first STA associated with the first AP can be determined according to the ML element
  • the channel change information of the AP that has undergone channel change so that the STAs associated with the AP that have undergone channel change know that the associated AP has undergone channel change and the channel change information after the channel change occurs.
  • the channel change information includes elements related to channel change; or, the channel change information includes the AP's changed operation set and channel number; or, the channel change information includes the AP's changed channel number.
  • the channel change information may include elements related to the channel change, and may also include the changed operation set and channel number of the AP, without limitation.
  • the management frame also includes a channel change count field; wherein, when the value of the channel change count field is the third value, the channel change count field is used to indicate that the channel change will be transmitted in the next beacon frame target Occurs immediately before the time; when the value of the channel change count field is the fourth value, the channel change count field is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the ML element carries the channel change information of the AP after the channel change occurs until the next DTIM beacon frame, so that the STA in the STA multi-link device can know the channel change information of the AP that has undergone the channel change.
  • the value of the channel change count field may be the second value, which is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the embodiment of the present application provides a first STA, which can realize the functions performed by the first STA in the above tenth aspect or in the possible design of the tenth aspect, and the functions can be executed by hardware.
  • the hardware or software includes one or more modules with corresponding functions above. For example, transceiver module and processing module.
  • a transceiver module configured to receive a management frame from the first access point AP; wherein the management frame includes an ML element, and the ML element includes channel change information of an AP in the first AP multi-link device that has undergone a channel change, and continues until The first STA receives the next transmission traffic indication graph DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP; the STA multi-link device includes the first STA; the processing module is used to The element obtains channel change information, so that in the STA multi-link device, the STA associated with the AP after the channel change occurs obtains the channel change information.
  • the ML element also includes the channel change information of the AP whose channel has changed in the second AP multi-link device, and continues until the first STA receives the next transmission traffic indication map DTIM sent by the first AP.
  • the channel change information includes elements related to channel change; or, the channel change information includes the AP's changed operation set and channel number; or, the channel change information includes the AP's changed channel number.
  • the management frame also includes a channel change count field; wherein, when the value of the channel change count field is the third value, the channel change count field is used to indicate that the channel change will be transmitted in the next beacon frame target Occurs immediately before the time; when the value of the channel change count field is the fourth value, the channel change count field is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the specific implementation manner of the first STA in the eleventh aspect may refer to the behavior function of the first STA in the communication method provided by the tenth aspect or any possible design of the tenth aspect.
  • the embodiment of the present application provides a first STA, where the first STA may be the first STA or a chip or a system on chip in the first STA.
  • the first STA may implement the above aspects or functions performed by the first STA in each possible design, and the functions may be implemented by hardware.
  • the first STA may include: a transceiver.
  • the transceiver may be used to support the first STA to implement the functions involved in the above tenth aspect or any possible design of the tenth aspect.
  • the transceiver may be used to receive a management frame from the first access point AP; where the management frame includes an ML element, and the ML element includes channel change information of an AP in the first AP multi-link device that has undergone a channel change, and Continue until the first STA receives the next DTIM beacon frame sent by the first AP; the first AP multi-link device includes the first AP; the STA multi-link device includes the first STA; the processor is used to The element obtains channel change information, so that in the STA multi-link device, the STA associated with the AP after the channel change occurs obtains the channel change information.
  • the first STA may further include a memory, and the memory is configured to store computer-executable instructions and data necessary for the first STA.
  • the transceiver and the processor execute the computer-executed instructions stored in the memory, so that the first STA executes the method described in the tenth aspect or any possible design of the tenth aspect communication method.
  • the specific implementation manner of the first STA in the twelfth aspect may refer to the behavior function of the first STA in the communication method provided by the tenth aspect or any possible design of the tenth aspect.
  • a communication device in a thirteenth aspect, includes one or more processors and one or more memories, the one or more memories are coupled to the one or more processors, and the one or more memories are used for Store computer programs or instructions; one or more processors for running computer programs or instructions, when one or more processors execute computer instructions or instructions, make any possible design as in the first aspect or the first aspect
  • the communication method is executed; or the communication method described in the fourth aspect or any possible design of the fourth aspect is executed; or the communication described in the seventh aspect or any possible design of the seventh aspect
  • the method is executed; or the communication method described in the tenth aspect or any possible design of the tenth aspect is executed.
  • the memory is located outside the communication device. In another possible implementation manner, the memory is located in the communication device. In the embodiment of the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • the communication device also includes one or more communication interfaces; the one or more communication interfaces are coupled with one or more processors, and the one or more communication interfaces are used to communicate with other modules outside the communication device to communicate. Communication interfaces; one or more communication interfaces are coupled to one or more processors.
  • a communication device in a fourteenth aspect, includes an interface circuit and a logic circuit; the interface circuit is coupled to the logic circuit; and the logic circuit is used to perform as described in the first aspect or any possible design of the first aspect or execute the communication method as described in the fourth aspect or any possible design of the fourth aspect; or execute the communication method as described in the seventh aspect or any possible design of the seventh aspect; or execute The communication method as described in the tenth aspect or any possible design of the tenth aspect; the interface circuit is used to communicate with other modules other than the communication device.
  • a computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are run on the computer, the computer executes the first aspect or the first aspect.
  • the communication method described in any possible design of the fourth aspect or execute the communication method described in the fourth aspect or any possible design of the fourth aspect; or execute the communication method described in the seventh aspect or any possible design of the seventh aspect.
  • a computer program product containing computer instructions.
  • the communication method described in the first aspect or any possible design of the first aspect is executed, or as The communication method described in the fourth aspect or any possible design of the fourth aspect is executed, or the communication method described in the seventh aspect or any possible design of the seventh aspect is executed, or as described in the tenth aspect or The communication method described in any possible design of the tenth aspect is executed.
  • the embodiment of the present application provides a computer program that, when running on a computer, enables the communication method described in the first aspect or any possible design of the first aspect to be executed, or the communication method described in the fourth aspect
  • the communication method described in the aspect or any possible design of the fourth aspect is executed, or the communication method described in the seventh aspect or any possible design of the seventh aspect is executed.
  • the technical effect brought by any one of the design methods from the thirteenth aspect to the seventeenth aspect can refer to the technical effect brought by any possible design of the above-mentioned first aspect, or refer to the above-mentioned fourth aspect
  • the technical effect brought by any possible design, or refer to the technical effect brought by any possible design of the seventh aspect above, or refer to the technical effect brought by any possible design of the tenth aspect above The technical effect will not be repeated.
  • a communication system which includes the first AP described in any one of the second to third aspects and the first AP described in any one of the fifth to sixth aspects An STA; or comprising the first AP described in any one of the eighth aspect to the ninth aspect and the first STA described in any one of the eleventh aspect to the twelfth aspect.
  • FIG. 1 is a schematic diagram of a frame format of a multi-BSSID element provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a frame format of a simplified neighbor report element provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a frame format of a TBTT information field provided by an embodiment of the present application
  • FIG. 4 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 8 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a frame format of a multi-link element provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a frame format of elements related to channel change provided in an embodiment of the present application.
  • FIG. 11 is a signal timing diagram provided by the embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a multi-link device provided in an embodiment of the present application.
  • FIG. 13 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a frame format of an ML element provided by an embodiment of the present application.
  • FIG. 15 is a signal timing diagram provided by the embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a first AP provided in an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a first STA provided in an embodiment of the present application.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDMA technology can support multiple nodes to transmit and receive data at the same time, thus achieving multi-site diversity gain.
  • FCC Federal Communications Commission
  • IEEE 802.11ax next-generation WiFi protocol - extremely high throughput (EHT) devices are forward compatible, so they will also support the working spectrum of 802.11ax devices, that is, they will support 2.4GHz, 5GHz and 6GHz frequency bands.
  • IEEE 802.11ax next-generation wireless fidelity (Wireless Fidelity, WiFi) protocol-EHT equipment is based on the latest open free 6GHz frequency band, based on the channel division of this frequency band, the supported bandwidth exceeds the maximum bandwidth of 160MHz supported by 5GHz, such as 320MHz.
  • the IEEE 802.11ax next-generation WiFi-EHT device can also increase the peak throughput by increasing the number of streams, such as increasing the number of streams to 16 streams, and cooperating with multiple frequency bands (2.4GHz, 5GHz and 6GHz). .
  • the peak throughput can also be improved by means of multiple channel cooperation and the delay of service transmission can be reduced.
  • This article refers to multi-band or multi-channel collectively as multi-link.
  • IEEE 802.11ax next-generation WiFi-EHT equipment uses multi-link cooperation technology to aggregate discontinuous multi-links to form ultra-large bandwidth.
  • multi-link cooperation technology can also use multi-link cooperation technology to send data packets of the same service to the same site at the same time.
  • Multiple basic service set identifier set (multiple basic service set identifier set, can be called multiple BSSID set): It can be understood as a collection of some cooperative access points (access point, AP). All cooperative APs use the same operating set, channel number, and antenna interface. In the multi-BSSID set, there is only one AP that transmits the BSSID, and the other APs are APs that do not transmit the BSSID.
  • the information of the multi-BSSID set (that is, the multi-BSSID element) is carried in a beacon frame (beacon) or a probe response frame (probe response) or a neighbor report sent by the AP transmitting the BSSID.
  • the BSSID information of the AP that does not transmit the BSSID is derived by the station through the above-mentioned beacon frame or probe response frame, or the Multiple BSSID element.
  • the non-transmission BSSID corresponding to the transmission BSSID is calculated from the BSSID index field in the Multiple BSSID index element in the summary sub-element. For details, please refer to the 802.11-2020 protocol.
  • the multi-BSSID set can also be understood as being composed of multiple APs.
  • Each AP manages a BSS, and different APs can have different SSIDs and permissions, such as security mechanisms or transmission opportunities.
  • the multi-BSSID set only the AP whose BSSID is the transmission BSSID can send the beacon frame and the probe response frame, and the AP that does not transmit the BSSID does not send the beacon frame. Therefore, if the probe request frame sent by the STA is for the Multiple BSSID set One of the BSSIDs in the Multiple BSSID set is an AP that does not transmit the BSSID, and the BSSID in the Multiple BSSID set is the AP that transmits the BSSID to help respond to send a probe response frame.
  • the BSSID of one AP is configured as a transmitting BSSID, and the AP that transmits the BSSID can be called a transmitting AP;
  • the BSSID of other APs is configured as a non-transmitting BSSID, and the AP that does not transmit a BSSID can be called It is a non-transit AP.
  • the beacon frame sent by the transmitting AP may include a multi-BSSID element.
  • the frame format of the multi-BSSID element is shown in Figure 1.
  • the multi-BSSID element may include an element ID field, a length field, a maximum BSSID indication field, and optional sub-elements field.
  • the maximum BSSID indication field is used to indicate the maximum number n of BSSIDs contained in the multi-BSSID set
  • the optional sub-element field includes BSSID information of APs that do not transmit BSSIDs, specifically the non-transmission BSSID summary sub-element.
  • each independent AP will try to find a clean channel, so that each Channel interference between independent APs is unavoidable, but adopting the way that one AP supports multiple BSSIDs, that is, one AP virtualizes multiple APs for different service types or customer types, can avoid channel interference.
  • a station wants to associate with an AP and establish a connection, it first needs to scan to find the existence of the AP. Scanning comes in two flavors: active scanning and passive scanning.
  • Passive scanning is a way to discover APs by receiving management frames sent by APs on the channel.
  • Management frames can be beacon frames, association response frames, re-association response frames, authentication frames, and probe response frames.
  • a station may hop on different channels to search for the reduced neighbor report element of the beacon frame sent by the AP.
  • the station can further obtain other additional information from the AP by exchanging probe request (probe request) frames and probe response frames.
  • probe request probe request
  • probe response frames probe response frames
  • the station can jump on different channels to search for the beacon frame sent by the AP, and directly obtain all the information of the AP.
  • Active scanning means that the station can actively send a broadcast probe request without hearing the beacon frame, and the AP that receives the probe request frame can reply with a probe response frame if certain conditions are met.
  • the AP will carry the reduced neighbor report element (reduced neighbor report element, RNR) in the management frame, for example, the beacon frame and the probe response frame, to avoid the station constantly scanning the channel and reduce the Scan time for the site.
  • RNR reduced neighbor report element
  • the AP can carry the Reduced Neighbor Report element in the management frame.
  • the station scans, it can receive the management frame sent by the AP, so as to obtain the information of the surrounding APs based on the simplified neighbor report elements, and then select a suitable AP for association.
  • the simplified neighbor report element generally carries one or more neighbor AP information (neighbor AP information) fields, which are used to describe the information of one or more neighbor APs and their respective BSSs, as shown in Figure 2, the simplified The neighbor report element may include the following fields: target beacon transmission time information header (TBTT information header) field, operating class (operating class) field, channel number (channel number) field, TBTT information set field .
  • TBTT information header target beacon transmission time information header
  • operating class operating class
  • channel number channel number
  • TBTT information set field TBTT information set field
  • the beacon frame target transmission time information header field may include TBTT information field type (TBTT information field type) field, filtered neighbor AP (filtered neighbor AP) field, reserved (reserved) field, TBTT information number (TBTT information count) field, TBTT information length (TBTT information length) field.
  • TBTT information field type TBTT information field type
  • filtered neighbor AP filtered neighbor AP
  • reserved reserved
  • TBTT information number TBTT information count
  • TBTT information length TBTT information length
  • the TBTT information field type may be used to indicate the type of TBTT information, which together with the TBTT information length field is used to indicate the format of the TBTT information field.
  • the filtered neighbor AP field may be used to indicate whether the SSIDs of all BSSs carried in the neighbor AP information field match the SSIDs in the probe response frame.
  • the bit number of the reserved field may be 1.
  • the number of TBTT information field may be used to indicate the number of TBTT information fields contained in the TBTT information set.
  • a TBTT information length field may be used to indicate the length of each TBTT information field.
  • Table 1 The specific information format carried under different lengths can be shown in Table 1 below:
  • the TBTT information field may include: the target beacon transmission time offset (neighbor AP TBTT offset) field of the neighbor AP: used to indicate the information between the neighbor AP and the reporting AP Offset of frame sending time.
  • BSSID field used to indicate the BSS identifier corresponding to the neighboring AP.
  • Short SSID field used to indicate the SSID of the neighboring AP.
  • BSS parameter (BSS parameter) field used to indicate the relevant parameters of the neighbor AP.
  • 20MHz power spectral density field power spectral density, PSD
  • MLD multi-link device
  • the BSS parameter field may include: It is recommended to use the on channel tunnel mechanism (on channel tunnel recommended, OCT recommended) field: used to indicate that the neighbor AP expects to exchange management types with the media access control protocol data unit (media access) through the OCT mechanism control protocol data unit, MPDU). Same SSID field: used to indicate whether the neighbor AP and the reporting AP have the same SSID. Multi-basic service set identification field: used to indicate whether the neighbor AP is part of a multi-BSSID set. Transmit BSSID field: If the neighbor AP is part of a multi-BSSID set, it further indicates whether the neighbor AP is a transmit BSSID or a non-transmit BSSID.
  • Co-located AP field used to indicate whether the neighbor AP is co-located with a 2.4/5GHz AP (that is, whether it is only 6GHz AP), and is a member of an extended service set.
  • Unsolicited probe response active unsolicited probe response active
  • Co-located AP Co-located AP
  • the MLD parameter field may include an MLD identification (identier, ID) field: used to indicate the identification of the AP MLD to which the reported AP belongs; link identification (link ID): used to indicate the link identification of the reported AP, wherein The link identifier represents a combination ⁇ operation set, channel number, BSSID of the AP>; and the BSS parameter change count (BSS parameter change count) field: the number of key BSS parameter changes used to be reported to the AP, where the initial value is 0 .
  • MLD identification identification
  • link ID used to indicate the link identification of the reported AP, wherein
  • the link identifier represents a combination ⁇ operation set, channel number, BSSID of the AP>
  • BSS parameter change count BSS parameter change count
  • the AP described in the neighbor report element (neighbor report element) or simplified neighbor report element in the embodiment of this application is the reported access point (reported access point), and the neighbor AP mentioned later can be understood as the reported access point ;
  • An AP that sends a neighbor report element or a simplified neighbor report element is a reporting access point (AP).
  • a multi-link device that can support parallel communication of multiple links
  • the multi-link device can include one or more stations, and the stations can be APs or non- Access point station (non-access point station, non-AP STA), non-AP STA can also be briefly referred to as STA.
  • the beacon frame sent above carries elements related to channel change; if the AP is an AP that does not transmit BSSID in the multi-BSSID set, the beacon frame sent by the corresponding transmitting AP carries the channel change related elements of the AP.
  • the AP has completed the channel change before other APs belonging to the same AP multi-link device send the management frame, the other AP (or it can also be described as the reporting AP) will not carry the channel change of the AP
  • the relevant elements that is, the above-mentioned non-AP multi-link device cannot know that the AP has undergone a channel change.
  • an embodiment of the present application provides a communication method and device, wherein, the first AP generates a management frame; wherein, the management frame includes a capability information field, and the capability information field includes first indication information; the first indication information uses Indicating whether other APs in the first AP multi-link device have changed channels; the first AP multi-link device includes the first AP; and the first AP sends a management frame to the first station STA.
  • the first AP when the first AP sends the management frame, by carrying the first indication information, it can indicate whether other APs in the multi-link device of the first AP have changed channels, so that the channel associated with the first AP belongs to the non- -
  • the first STA of the AP MLD determines whether there are other APs in the first AP multi-link device that have undergone channel changes according to the first indication information, and if so, obtains the channel change information of the APs that have undergone channel changes, so as to make the same
  • the STA (even if the STA is in the dormant state) associated with the AP associated with the channel change and belonging to the same non-AP MLD knows that the channel change has occurred in the associated AP and the channel change information after the channel change occurs.
  • the wireless communication system to which the embodiment of the present application is applicable may be a WLAN or a cellular network.
  • the communication method may be implemented by a communication device in the wireless communication system or a chip or a processor in the communication device.
  • the communication device may be a network that supports multiple chains
  • a wireless communication device that performs transmission in parallel, for example, is called a multi-link device or a multi-band device. Compared with devices that only support single-link transmission, multi-link devices have higher transmission efficiency and higher throughput.
  • a multi-link device may include one or more affiliated STAs (affiliated STAs).
  • An affiliated STA is a logical station that can work on one link.
  • the affiliated station may be an AP or an STA.
  • the multi-link device whose affiliated site is an AP can be called a multi-link AP or a multi-link AP device or an AP multi-link device (AP multi-link device, AP MLD), and the affiliated site
  • a multi-link device that is a non-AP STA may be called a multi-link STA or a multi-link STA device or an STA multi-link device (STA multi-link device, STA MLD).
  • STA multi-link device STA multi-link device, STA MLD
  • a multi-link device may include multiple logical sites, and each logical site works on one link, but multiple logical sites are allowed to work on the same link.
  • Multi-link devices can follow 802.11 series protocols to realize wireless communication, for example, follow EHT stations, or follow 802.11be-based or compatible 802.11be-supported stations to realize communication with other devices.
  • 802.11 series protocols to realize wireless communication
  • other devices can be multi-link devices, or May not be a multilink device.
  • the multi-link device in the embodiment of the present application may be a single-antenna device or a multi-antenna device.
  • it may be a device with more than two antennas.
  • the embodiment of the present application does not limit the number of antennas included in the multi-link device.
  • the multi-link device can allow the same access type of business to be transmitted on different links, or even allow the same data packet to be transmitted on different links; it can also not allow the same access type of business Transmit on different links, but allow services of different access types to be transmitted on different links.
  • the multi-link device is a device with a wireless communication function
  • the device may be a complete device, or a chip or a processing system installed in the complete device, and a device in which these chips or processing systems are installed
  • the methods and functions of the embodiments of the present application can be implemented under the control of these chips or processing systems.
  • the STA MLD in the embodiment of the present application has a wireless transceiver function, and can communicate with AP MLD or other STA MLD or single-link devices in order to support 802.11 series protocols.
  • STA MLD allows users to communicate with APs and then communicate with APs Any user communication device for WLAN communication.
  • STA MLD can be a tablet computer, desktop, laptop, notebook computer, ultra-mobile personal computer (UMPC), handheld computer, netbook, personal digital assistant (personal digital assistant, PDA), mobile phone
  • UMPC ultra-mobile personal computer
  • PDA personal digital assistant
  • STA MLD can also be the chip and processing system in the above-mentioned terminals.
  • the AP MLD in the embodiment of the present application provides services for the STA MLD, and can support 802.11 series protocols.
  • the AP MLD can be communication entities such as communication servers, routers, switches, and network bridges, or the AP MLD can include various forms of macro base stations, micro base stations, relay stations, etc.
  • the AP MLD can also be these various forms
  • the chip and the processing system in the device realize the method and function of the embodiment of the present application.
  • multi-link devices can support high-speed and low-latency transmission.
  • multi-link devices can also be applied to more scenarios, such as sensor nodes in smart cities (for example, Smart water meters, smart meters, smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, displays, TVs, stereos, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (such as AR, VR and other wearable devices), smart devices in smart offices (such as printers, projectors, etc.), Internet of Vehicles devices in Internet of Vehicles, and some infrastructure in daily life scenes (such as vending machines, supermarkets, etc.) Self-service navigation console, self-service cash register equipment, self-service ordering machine, etc.).
  • the specific forms of STA MLD and AP MLD are not specifically limited in the embodiments of the present application, and are only illustrative descriptions here.
  • the 802.11 protocol may be a protocol supporting 802.11be or compatible with 802.11be.
  • the working frequency band of the multi-link device may include: one or more of sub 1GHz, 2.4GHz, 5GHz, 6GHz and high frequency 60GHz, such as including 2.4GHz, 5GHz, 6GHz.
  • each link may include a link identifier, where the link identifier represents a station working on a link, that is, if there is more than one station on a link, then More than 1 link ID characterizes them.
  • the links mentioned below sometimes also refer to the stations working on the links.
  • AP MLD and STA MLD can use the link identifier to identify a link or a station on a link during data transmission.
  • the AP MLD and the STA MLD can first negotiate or communicate the correspondence between the link identifier and a link or a station on a link. Therefore, in data transmission, a large amount of signaling information is not transmitted to indicate a link or a station on the link, and only the link identifier needs to be carried, which reduces signaling overhead and improves transmission efficiency.
  • the management frame sent by the AP MLD when establishing the BSS such as a beacon frame
  • the element includes multiple link identification information fields.
  • the link identifier information field may indicate a correspondence between a link identifier and a station working on the link corresponding to the link identifier.
  • the link identification information field includes not only the link identification, but also one or more of the following information: MAC address, operation set, channel number. Wherein, one or more of MAC address, operation set, and channel number may indicate a link.
  • the MAC address of the AP is also the BSSID of the AP.
  • the AP MLD and the STA multi-link device negotiate multiple link identification information fields.
  • multi-link device association means that one AP of AP MLD associates with one STA of STA MLD. This association can help multiple STAs of STA MLD to associate with multiple APs of AP MLD respectively.
  • one STA is associated to an AP.
  • the AP MLD or STA multi-link device will use the link identifier to represent a station in the STA multi-link device.
  • the link identifier can also represent the MAC address of the station, the working operation set, and the channel number.
  • the MAC address can be replaced with the association identifier of the associated AP MLD.
  • the meaning of the link identifier not only includes the operation set and channel number of the link, but also includes working on the link
  • the site identifier of the site such as the MAC address of the site or the association identifier (AID) of the site.
  • the embodiment of the present application mainly takes the network deploying IEEE 802.11 as an example for illustration, those skilled in the art can easily understand that various aspects involved in the present application can be extended to other networks using various standards or protocols, for example, BLUETOOTH (Bluetooth) , high performance wireless LAN (high performance radio LAN, HIPERLAN) (a wireless standard similar to the IEEE 802.1 1 standard, mainly used in Europe), and wide area network (WAN), wireless local area network (wireless local area network, WLAN), personal area Network (personal area network, PAN) or other known or later developed network.
  • BLUETOOTH Bluetooth
  • high performance wireless LAN high performance radio LAN, HIPERLAN
  • WAN wide area network
  • wireless local area network wireless local area network
  • WLAN wireless local area network
  • PAN personal area network
  • FIG. 4 introduces a communication system 400 applied in the embodiment of the present application by taking a wireless local area network as an example.
  • the communication system 400 includes: a station 401 and a station 402 .
  • the station 401 can communicate with the station 402 using multiple links, so as to achieve the effect of improving the throughput.
  • Station 401 may be a multi-link device, and station 402 may be a single-link device or a multi-link device.
  • station 401 is an AP MLD
  • station 402 is a STA MLD or a station (such as a single-link station).
  • the station 401 is a STA MLD, and the station 402 is an AP (such as a single-link AP) or an AP MLD.
  • station 401 is an AP MLD, and station 402 is an AP MLD or AP; in another scenario, station 401 is a STA MLD, and station 402 is a STA MLD or STA (such as a single-link station).
  • the wireless local area network may also include other devices. The number and type of devices illustrated in Figure 4 are exemplary only.
  • FIG. 5 and FIG. 6 respectively show structural schematic diagrams of a communication system 500 and a communication system 600 .
  • the communication system 500 and the communication system 600 take an example in which a multi-link device communicates with other devices through multiple links in a wireless local area network.
  • Figure 5 shows a communication scenario between AP MLD and STA MLD.
  • AP MLD includes affiliated AP1 and AP2
  • STA MLD includes affiliated STA1 and STA2
  • AP MLD and STA MLD use link 1 and link 2 in parallel communication.
  • FIG 6 shows the scenario where AP MLD601 communicates with STA MLD602, STA MLD603, and STA604.
  • AP MLD601 includes AP601-1 to AP601-3 to which it belongs; STA MLD602 includes three STA602-1, STA602-2, and STA602- 3; STA MLD603 includes 2 affiliated STA603-1, STA603-2; STA604-1, STA604 are single-link devices.
  • AP MLD601 can use link 1, link 2 and link 3 to communicate with STA MLD602 respectively; use link 2 and link 3 to communicate with STA MLD603; use link 1 to communicate with STA604.
  • STA604 works in the 2.4GHz frequency band
  • STA MLD603, STA603-1 works in the 5GHz frequency band
  • STA603-2 works in the 6GHz frequency band
  • STA MLD602 STA602-1 works in the 2.4GHz frequency band
  • STA602-2 works in the 5GHz frequency band frequency band
  • STA602-3 works in the 6GHz frequency band.
  • AP601-1 working in the 2.4GHz frequency band in AP MLD601 can transmit uplink or downlink data between STA604 and STA602-2 in STA MLD602 through link 1.
  • AP601-2 working in the 5GHz frequency band in AP MLD601 can transmit uplink or downlink data between STA603-1 working in the 5GHz frequency band in STA MLD603 through link 2, and can also work in STA MLD602 through link 2
  • Uplink or downlink data is transmitted between STA602-2 in the 5GHz frequency band.
  • AP601-3 working in the 6GHz frequency band in AP MLD601 can transmit uplink or downlink data between STA602-3 in STA MLD602 and STA602-3 in STA MLD602 through link 3, and can also communicate with STA603-2 in STA MLD through link 3 transmit uplink or downlink data.
  • Figure 5 only shows that AP MLD supports two frequency bands
  • Figure 6 only shows that AP MLD701 supports three frequency bands (2.4GHz, 5GHz, 6GHz), each frequency band corresponds to a link
  • AP MLD701 can work in the chain
  • One or more links in the link 1, the link 2, or the link 3 are taken as an example for illustration.
  • the link On the AP side or the STA side, the link here can also be understood as a station working on the link.
  • AP MLD and STA MLD can also support more or fewer frequency bands, that is, AP MLD and STA MLD can work on more links or fewer links, which is not the case in the embodiment of this application. To limit.
  • each access point device and station device may adopt the composition structure shown in FIG. 7 , or include the components shown in FIG. 7 .
  • FIG. 7 is a schematic diagram of the composition of a communication device 700 provided in an embodiment of the present application.
  • the communication device 700 may be an access point device or a chip or a system on a chip in an access point device; it may also be a station device or a chip in a station device. chip or system-on-chip.
  • the communication device 700 includes a processor 701 , a transceiver 702 and a communication line 703 .
  • the communication device 700 may further include a memory 704 .
  • the processor 701 , the memory 704 and the transceiver 702 may be connected through a communication line 703 .
  • the processor 701 is a central processing unit (central processing unit, CPU), a general-purpose processor, a network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, Programmable logic device (programmable logic device, PLD) or any combination thereof.
  • the processor 701 may also be other devices with processing functions, such as circuits, devices or software modules, which are not limited.
  • the transceiver 702 is used for communicating with other devices or other communication networks.
  • the other communication network may be an Ethernet, a radio access network (radio access network, RAN), a wireless local area network (wireless local area networks, WLAN), and the like.
  • the transceiver 702 may be a module, a circuit, a transceiver, or any device capable of implementing communication.
  • the communication line 703 is used to transmit information between the components included in the communication device 700 .
  • the memory 704 is used for storing instructions.
  • the instruction may be a computer program.
  • the memory 704 can be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, and can also be a random access memory (random access memory, RAM) or a Other types of dynamic storage devices that store information and/or instructions can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD- ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disc storage media or other magnetic storage devices, etc., without limitation.
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • magnetic disc storage media or other magnetic storage devices etc., without limitation.
  • the memory 704 may exist independently of the processor 701 or may be integrated with the processor 701 .
  • the memory 704 can be used to store instructions or program codes or some data, etc.
  • the memory 704 may be located in the communication device 700 or outside the communication device 700, without limitation.
  • the processor 701 is configured to execute instructions stored in the memory 704, so as to implement the communication method provided by the following embodiments of the present application.
  • the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7 .
  • the communications apparatus 700 includes multiple processors, for example, in addition to the processor 701 in FIG. 7 , it may further include a processor 707 .
  • the communication apparatus 700 further includes an output device 705 and an input device 706 .
  • the input device 706 is a device such as a keyboard, a mouse, a microphone, or a joystick
  • the output device 705 is a device such as a display screen and a speaker (speaker).
  • the communication device 700 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device having a structure similar to that shown in FIG. 7 .
  • the composition structure shown in FIG. 7 does not constitute a limitation to the communication device.
  • the communication device may include more or less components than those shown in the illustration, or combine certain components , or different component arrangements.
  • system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • actions, terms, etc. involved in various embodiments of the present application may refer to each other without limitation.
  • the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.
  • the first AP can be any report in the communication system shown in Figure 4 to Figure 6 AP (the reporting AP is an AP that sends a management frame, such as a beacon frame, a probe response frame, etc.), the first STA may be any STA associated with the first AP in the communication system shown in Figures 4 to 7, and Belonging to the STA multi-link device (or it can also be described as non-AP MLD); where the first AP multi-link device where the first AP is located and the STA multi-link device where the first STA is located can communicate through multi-link connect.
  • Both the first AP and the first STA described in the following embodiments may have the components shown in FIG. 7 .
  • Fig. 8 is a flow chart of a communication method provided by an embodiment of the present application. As shown in Fig. 8, the method may include:
  • Step 801 the first access point AP generates a management frame.
  • the first AP multi-link device may include at least one AP, and the at least one AP may include the first AP; the management frame may include a capability information field, and the capability information field may include first indication information.
  • the management frame may be one or more of the following: a beacon frame, an association response frame, a re-association response frame, an authentication frame, and a probe response frame.
  • the first indication information may be used to indicate whether other APs in the first AP multi-link device have changed channels; or the first indication information may be used to indicate whether the first AP multi-link device includes the first AP APs within have changed channels.
  • the following uses the first indication information as an example to indicate whether other APs in the first AP multi-link device have changed channels. It can be understood that the following embodiments are also applicable to the first indication information used to indicate the second Whether any APs including the first AP have changed channels in the AP multi-link device.
  • the first indication information may be set to a first value, such as 1; otherwise, the first indication information may be set to a second value, such as 0. It should be noted that, if the first indication information is set to the first value, the value needs to be kept until the next delivery traffic indication map (DTIM) beacon frame, after the DTIM beacon frame, the first The indication information is reset to the second value.
  • DTIM delivery traffic indication map
  • the capability information field further includes first key parameter update flag signaling.
  • the first key parameter update flag signaling can be used to indicate whether the key parameter update value of the AP in the first AP multi-link device changes, and the key parameter update value can also be described as a BSS parameter change count value, or described as The value of the BSS parameter change count field.
  • the first AP adjusts the update value of the key parameter of the AP.
  • the first AP adjusts the first key parameter update flag signaling.
  • the update value of the key parameter of the AP is increased by 1.
  • the first key parameter update flag signaling can be set to the first value, such as 1; otherwise, the first key parameter update flag signaling can be set to 1;
  • the key parameter update flag signaling is set to a second value, such as 0. It should be noted that, if the first key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the first key parameter update flag signaling is repeated set to the second value.
  • the key parameter update value is located in the BSS parameter change count field in the MLD parameter field in the RNR element.
  • the key BSS parameter event may include at least one event in the following events: modifying the enhanced distributed channel access EDCA parameter element (modification of the enhanced distributed channel access parameters element), modifying the direct sequence spread spectrum DSSS parameter set element (modification of the direct sequence spread spectrum parameter set), modification of the high throughput operation element (modification of the high throughput operation element), including the wide bandwidth channel change element (inclusion of a wide bandwidth channel switch element), including wide bandwidth channel change Envelope element (inclusion of a channel switch wrapper element), including operation mode notification element (inclusion of an operating mode notification element), modification of the very high throughput VHT operation element (modification of the very high throughput operation element), modification of high-efficiency operation element (modification of the high efficient operation element), insert broadcast target wakeup time TWT element (insertion of a broadcast target wakeup time element), including BSS color change notification element (inclusion of the BSS color change announcement element), modify multi-user MU EDCA Modification of the MU enhanced distributed channel access parameter set element, modification of the spatial reuse parameter set element
  • the key BSS parameter event may include any one of the above-mentioned events.
  • the key BSS parameter event also includes modification of the contention free parameter set element (modification of the contention free parameter set element).
  • the first AP may carry key parameter update values of all APs in the first AP multi-link device except the first AP in the MLD parameter field in the RNR element of the management frame as shown in FIG. 3 ;
  • the first AP may also carry the key parameter update value of the first AP in the common information field in the multi-link element as shown in FIG. 9 .
  • the key BSS parameter events do not include any of the following events: including the channel change notification element (inclusion of channel switch announcement element), including the extended channel change notification element (inclusion of extended channel switch announcement element), Includes static elements (inclusion of quiet element), including static channel elements (inclusion of quiet channel element).
  • the update values of key parameters of other APs will not change. Elements related to channel change will not cause the value of the first key parameter update flag signaling to change.
  • whether the management frames sent by other APs include elements related to channel change can also be described as whether other APs are undergoing channel change. That is, no matter whether other APs are undergoing channel changes, it will not cause the value of the key parameter update value of other APs to change, that is, no matter whether other APs are undergoing channel changes, it will not cause the first key parameter update flag signal command value changes.
  • the STA multi-link device associated with an AP multi-link device obtains the channel change information of the repeated AP according to the RNR element and the multi-link element in the management frame, thereby reducing the power consumption of the STA multi-link device and saving air interface transmission opportunities .
  • the multi-link element of the management frame sent by the first AP may carry the elements related to the channel change of the other AP, so that the first STA obtains the elements related to the channel change of the AP that is undergoing channel change according to the management frame, so that the elements related to the channel change of the AP are STAs belong to the same STA multi-link device, and the STA associated with the AP undergoing channel change obtains the elements related to the channel change of the associated AP.
  • the elements related to channel change may include one or more of the following: channel change notification element, extended channel change notification element, and maximum channel change time element.
  • the channel change notification element may include an element number field, a length field, a channel change mode field, a new channel number field and a channel change count field.
  • the extended channel change notification element may include an element number field, a length field, a channel change mode field, a new operation set field, a new channel number field, and a channel change count field.
  • the channel change count field indicates that the station sending the channel change element or the extended channel change element changes to a new channel, or the number of remaining TBTTs of the new operation set and the new channel. For example, by setting the Channel Change Count field to 1, you can indicate that the change will occur immediately before the next TBTT, and setting the Channel Change Count field to 0, you can indicate that the change will occur anytime after this frame is sent.
  • the new channel number field indicates the channel number after the channel change
  • the new operation set field indicates the operation set after the channel change.
  • the time fields of the above elements related to channel change may use the beacon frame transmission time and beacon frame interval of the AP that is undergoing channel change as a reference.
  • the RNR element in the management frame sent by the first AP before the channel target change time point, includes the channel information of the AP (reported neighbor AP) that has undergone channel change, and the channel information includes The operation set and channel number of the AP working before this time point (that is, the operation set and channel number before the channel change); after the channel target change time point, the RNR element in the management frame sent by the first AP includes the channel that has occurred Channel information of the changed AP (reported neighbor AP), the channel information includes the operation set and channel number of the AP working after the time point (that is, the operation set and channel number after the channel change).
  • Step 802 the first AP sends a management frame to the first STA.
  • the first STA receives the management frame.
  • Step 803 When the first indication information is used to indicate that other APs in the first AP multi-link device have undergone channel change, the first STA receives the channel change information of the AP after the channel change, so that the channel change information of the AP with which the first STA belongs In the same STA multi-link device, the STA associated with the AP after channel change obtains the channel change information.
  • the first STA may be an STA associated with the first AP in the STA multi-link device.
  • STAs other than the first STA are in a dormant state, and the first STA is used as an example to listen to the working link.
  • the indication information is used to determine whether other APs in the first AP multi-link device have changed channels.
  • the first STA can analyze the multi-link information in the management frame. Elements to obtain the channel change-related elements of the AP that is undergoing channel change. If no AP in the first AP multi-link device is undergoing channel change (for example, channel change has occurred), the multi-link element in the management frame received by the first STA does not carry elements related to channel change.
  • the first STA can analyze the management frame. RNR element in the frame to obtain the channel information of the AP whose channel has changed. If the first indication information indicates that no other AP in the first AP multi-link device has changed channels, since the RNR element is used for neighboring AP discovery, the first STA may or may not parse the RNR element in the management frame. RNR elements, thereby reducing power consumption.
  • the STA multi-link device has been associated with the first AP multi-link device.
  • the first indication information indicates that an AP in the first AP multi-link device has undergone a channel change (it can also be understood as the channel information of any other AP in the RNR element about the first AP multi-link device has changed or The channel channel information of the first AP has changed), or other APs have undergone channel changes (it can also be understood as the channel information of any other AP in the RNR element on the first AP multi-link device has changed), the first STA The RNR element in the management frame can be parsed to obtain the channel information of the AP that has undergone a channel change. At the same time, other STAs that belong to the same STA multi-link device as the first STA also know the channel information. The STA associated with the AP facilitates subsequent communication with the AP associated with it based on the channel change information.
  • the STA multi-link device includes STA1 and STA2, and establishes a multi-link connection with the first AP multi-link device, wherein STA1 and STA2 are respectively associated to the first AP multi-link Take AP 1 and AP 2 of the device as an example. Assuming that STA1 is in a dormant state, STA2 observes its working link 2.
  • the beacon frame interval sent by AP2 on link 2 is relatively large, resulting in the beacon on link 2
  • the frame does not carry a channel change notification element or an extended channel change notification element, so when the first beacon frame on link 2 is sent, AP1 on link 1 does not send a channel change, while the first beacon frame on link 2 sends
  • AP1 on link 1 has completed the channel change.
  • STA2 in the waking state of the STA multi-link device cannot know the channel change information of AP1 located on link 1, so that the STA multi-link device cannot communicate with AP1.
  • STA2 can determine according to the first indication information that there are other APs in the first AP multi-link device that have undergone channel changes, and then analyze the RNR in the beacon frame. element, to obtain the channel information of AP1, and then enable STA1 associated with AP1 to obtain the channel information of AP1, so as to ensure that STA1 and AP1 can communicate normally.
  • the first AP when the first AP sends a management frame, by carrying the first indication information, it can indicate whether other APs in the multi-link device of the first AP have changed channels, so that the channel associated with the first AP
  • the first STA belonging to the non-AP multi-link device determines whether other APs in the first AP multi-link device have changed channels according to the first indication information, and if so, obtains the channel change of the AP whose channel has changed information, so that the STA (even if the STA is in a dormant state) associated with the AP that has undergone a channel change and that belongs to the same non-AP MLD knows that the associated AP has undergone a channel change, and the channel change after the channel change occurs information.
  • the management frame sent also includes a non-transmission basic service set identification BSSID field, and the non-transmission BSSID field includes second indication information; the second indication The information may be used to indicate whether other APs in the second AP multi-link device have changed channels, and at least one AP in the second AP multi-link device belongs to the same multi-BSSID set as the first AP.
  • the non-transmission BSSID field is located in the non-transmission BSSID capability element in the non-transmission BSSID summary sub-element of the Multiple BSSID element, and the non-transmission BSSID field can also be called the non-transmission BSSID capability field, or other names.
  • the other APs in the second AP multi-link device may be other APs in the second multi-link device except the transmitting AP.
  • the multi-BSSID set 1 may include BSSID-1x and BSSID-1y; the multi-BSSID set 2 may include BSSID-2y, BSSID-2x and BSSID-2z; the multi-BSSID set 4 may include BSSID- 4x, BSSID-4y and BSSID-4z.
  • link 1 take AP-1x (BSSID-1x) sending beacon frames as an example, the first AP multi-link device may be AP MLD 1, and the second AP multi-link device may be AP MLD 3.
  • the first AP multi-link device can be AP MLD 2
  • the second AP multi-link device can be AP MLD 1 and AP MLD 3
  • the first AP multi-link device can be AP MLD 2
  • the second AP multi-link device can be AP MLD 3 and AP MLD 4 .
  • the second indication information when another AP in the second AP multi-link device has undergone a channel change, the second indication information may be set to a first value, such as 1; otherwise, the second indication information may be set to a second value, such as 0. It should be noted that if the second indication information is set to the first value, the value needs to be kept until the next DTIM beacon frame (a DTIM beacon frame that does not transmit the BSSID). After the DTIM beacon frame, the first indication The information is reset to the second value.
  • the non-transmission BSSID field further includes second key parameter update flag signaling.
  • the second key parameter update flag signaling may be used to indicate whether the update value of the key parameter of the AP in the second AP multi-link device changes.
  • the first AP adjusts the update value of the key parameter of the AP.
  • the first AP adjusts the second key parameter update flag signaling.
  • the update value of the key parameter of the AP is increased by 1.
  • the second key parameter update flag signaling can be set to the first value, such as 1; otherwise, set the second key parameter update flag signaling to the first value, such as 1;
  • the second key parameter update flag signaling is set to a second value, such as 0. It should be noted that if the second key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame (a DTIM beacon frame that does not transmit BSSID), after the DTIM beacon frame , the second key parameter update flag signaling is reset to the second value.
  • the key parameter update value is located in the BSS parameter change count field in the MLD parameter field in the RNR element.
  • the first AP may carry key parameter update values of other APs in the second AP multi-link device except the non-transmitting APs in the same multi-BSSID set as the first AP in the In the MLD parameter field in the RNR element of the management frame, the first AP can also carry the key parameter update value of the non-transmitting AP in the multi-link device of the second AP that is in the same multi-BSSID set as the first AP in the In the public information field in the multi-link element shown in 9.
  • the second AP multi-link device regardless of whether the management frames sent by other APs include elements related to channel change, it will not cause the value of the key parameter update value of other APs to change, that is, no matter whether the management frames sent by other APs Elements related to channel change will not cause the value of the first key parameter update flag signaling to change.
  • whether the management frames sent by other APs include elements related to channel change can also be described as whether other APs are undergoing channel change. That is, no matter whether other APs are undergoing channel changes, it will not cause the value of the key parameter update value of other APs to change, that is, no matter whether other APs are undergoing channel changes, it will not cause the first key parameter update flag signal command value changes.
  • the RNR element in the management frame sent by the first AP may also include the channel information of the AP whose channel has changed in the second AP multi-link device, and the channel information includes the AP in the multi-link device.
  • the operation set and channel number that worked before this time point that is, the operation set and channel number before the channel change
  • the RNR element in the management frame sent by the first AP includes the second AP multilink
  • the channel information includes the operation set and channel number of the AP working after this time point (that is, the operation set and channel number after the channel change) .
  • the first AP When the first AP sends a management frame, by carrying the second indication information, it can indicate whether other APs in the second AP multi-link device have changed channels, so that the first AP associated with the first AP and belonging to the non-AP MLD
  • the STA determines whether there are other APs in the second AP multi-link device that have undergone a channel change according to the second indication information, and if so, obtains the channel change information of the AP that has undergone a channel change, so as to associate with the AP that has undergone a channel change
  • the STAs belonging to the same non-AP MLD (even if the STA is in a dormant state) know that the channel change has occurred in the associated AP and the channel change information after the channel change occurs.
  • the first indication information is used to indicate whether other APs in the first AP multi-link device have changed channels
  • the first key parameter update flag signaling is used to indicate the first AP multi-link device.
  • the embodiment of the present application can also redefine the first key parameter update flag signaling, that is, redefine the first key parameter update flag signaling to indicate Whether the key parameter update value of the AP in the first AP multi-link device changes or whether other APs in the first AP multi-link device have changed channels.
  • the first key parameter update flag signaling can be set to a first value, such as 1; or, when the first AP multi-link If other APs in the device have changed channels, the first key parameter update flag signaling can be set to the first value, such as 1; or, when the key parameter update value of the AP in the first AP multi-link device changes and the second If other APs in an AP multi-link device have channel changes, the first key parameter update flag signaling can be set to the first value, such as 1; otherwise, the first key parameter update flag signaling can be set to the second value, such as 0. It should be noted that, if the first key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the first key parameter update flag signaling is repeated set to the second value.
  • the first key parameter update flag signaling may be redefined as used to indicate the channel information of other APs of the first AP multi-link device in the RNR element, or the key parameter update value of the other AP has changed, or The key parameter update value of the first AP has been changed.
  • the first key parameter update flag signaling when used to indicate channel information about other APs of the first AP multi-link device in the RNR element, the first key parameter update flag signaling may be set to a first value, such as 1; or, when the key parameter update value of other APs of the first AP multi-link device has changed, the first key parameter update flag signaling can be set to the first value, such as 1; or, when the key parameter of the first AP If the update value has been changed, the first key parameter update flag signaling can be set to a first value, such as 1; otherwise, the first key parameter update flag signaling can be set to a second value, such as 0. It should be noted that, if the first key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the first key parameter update flag signaling is repeated set to the second value.
  • the first key parameter update flag signaling can also be redefined as information used to indicate other APs of the first AP multi-link device in the RNR element (for example, including channel information, key parameter update values, link identifiers, etc. one or more of the above), or the information of the first AP has changed (such as including one or more of key parameter update values, link identifiers, etc.). It can also be described as redefining the first key parameter update flag signaling as used to indicate that the information of other APs of the first AP multi-link device has changed (or described as the information of other APs of the first AP multi-link device being redefined). configuration), or the key parameter update value of the other AP has been changed, or the key parameter update value of the first AP has been changed.
  • the information (or described as reconfiguration information) of other APs of the first AP multi-link device may be carried in a management frame, and the management frame carries an RNR element.
  • the first key parameter update flag signaling may be another independent signaling carried in a beacon frame, a probe response frame, or other management frames, such as a capability information field.
  • the independent signaling no longer includes the change of the update value of the associated parameter in the information of other APs of the first AP multi-link device, and the change of the information of the first AP. That is to say, the meaning of the existing first key parameter update flag signaling is not included.
  • the information change (or called reconfiguration) of the AP of the first AP multi-link device it can be understood as one or more of the following:
  • the information of the AP does not appear in the RNR element, and the link identifier included in the information of the AP is removed.
  • the information shown in FIG. 2 and FIG. 3 belongs to a type of information change of the AP.
  • the information of the AP is newly added to the RNR element, including the link identifier in the newly added information of the AP.
  • the information shown in FIG. 2 and FIG. 3 belongs to a type of information change of the AP.
  • One or more APs in the first multi-link device are in the state of disabling/enabling, and the information belonging to the AP changes.
  • 1-bit information signaling included in the AP information indicates whether the AP is in a disabled state or in an enabled state.
  • the 1-bit information may be located in the MLD parameter field in the RNR element, further speaking, in the link identification field of the MLD parameter field.
  • the link identification field includes a 4-bit link identification and a 1-bit information signaling field, and the 1-bit information signaling field is used to indicate whether the reported AP is in an enabled state or a disabled state; set the first value, For example, 0 indicates that the reported AP is in an enabled state; setting the first value, such as 1, indicates that the reported AP is in a disabled state; and vice versa. Since the MLD parameter field is newly added in the 802.11be generation standard, traditional stations cannot recognize the newly added MLD parameter field, and thus cannot know its meaning.
  • the 1-bit information may be located in the TBTT information field type in the TBTT information header field in the RNR element. For example, if the TBTT information field type field is set to "0", the AP is in the enabled state; if the TBTT information field type field is set to another value, such as "1", the AP is in the disabled state at this time; Note that in the current RNR element, only the value of 0 is used for the 2-bit TBTT information field type field, and the other 3 values are unused or reserved.
  • the 1-bit information can be located in the reserved field in the TBTT information header field in the RNR element, set the first value, such as 0, indicating that the reported AP is in an enabled state; set the first value, such as 1, indicating that it is reported The AP is in the disabled state; and vice versa.
  • This method can also prevent the traditional station from identifying the information of the reported AP, thereby preventing the traditional station from scanning the reported AP or disassociated from the reported AP. Solve the problems of traditional sites. Among them, traditional sites include unassociated sites and, of course, associated sites.
  • methods 1), 2) and 3) are all applicable to the new generation of 802.11be stations, or the next generation of stations.
  • the working links (such as corresponding channel numbers and operation sets) of one or more APs in the first multi-link device are replaced.
  • the channel information of the AP is changed, including the channel number and or operation set.
  • it also includes that the link identifier has been changed.
  • the first key parameter update flag signaling when used to indicate information about other APs of the first AP multi-link device in the RNR element (such as including channel information, key parameter update values, link identifiers, etc.),
  • the first key parameter update flag signaling can be set to a first value, such as 1; or, when the information of the first AP has changed (such as including key parameter update values, link identifiers, etc.), the first key parameter update flag can be set to The signaling is set to a first value, such as 1; otherwise, the first key parameter update flag signaling is set to a second value, such as 0. It should be noted that, if the first key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the first key parameter update flag signaling is repeated set to the second value.
  • the first STA can further analyze the RNR element in the management frame where the first key parameter update flag signaling is located, and further determine whether other APs in the first AP multi-link device have changed channels, and if so, obtain the The channel change information of the AP that has undergone channel change, so that the STA associated with the AP that has undergone channel change in the multi-link device that belongs to the same STA as the first STA obtains the channel change information.
  • the first STA may also further analyze the management frame to determine whether an update value of a key parameter of the AP changes.
  • the first STA may also analyze the management frame after receiving the management frame including the first key parameter update flag signaling sent by the first AP, and based on the first associated parameter update flag signaling in the management frame, the STA may The link device may obtain information about changes of other APs, or updated values of key parameters that have been changed by other APs, or updated values of key parameters that have been changed by the first AP.
  • the above-mentioned second key parameter update flag signaling can also be redefined, that is, the second key parameter update flag signaling is used to indicate the second Whether the key parameter update value of the AP in the AP multi-link device changes or whether other APs in the second AP multi-link device have channel changes.
  • the second key parameter update flag signaling can be set to the first value, such as 1; or, when the second AP multi-link If other APs in the device have changed channels, the second key parameter update flag signaling can be set to the first value, such as 1; or, when the key parameter update value of the AP in the second AP multi-link device changes and the second If other APs in the AP multi-link device have channel changes, the second key parameter update flag signaling can be set to the first value, such as 1; otherwise, the second key parameter update flag signaling can be set to the second value, such as 0. It should be noted that if the second key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the second key parameter update flag signaling is repeated set to the second value.
  • the second key parameter update flag signaling can also be redefined as used to indicate the channel information of other APs in the RNR element about the second AP multi-link device except the transmitting AP, or the key parameter update of the other AP The value has changed, or the key parameter update value of the non-transmitting AP has changed.
  • the second key parameter update flag signaling when the second key parameter update flag signaling is used to indicate the channel information of other APs in the RNR element about the second AP multi-link device except the transmitting AP, the second key parameter update flag signaling may be set to The first value, such as 1; or, when the key parameter update values of other APs of the second AP multi-link device have changed, the second key parameter update flag signaling can be set to the first value, such as 1; or, when the second The key parameter update value of the non-transmitting AP in the second AP multi-link device has been changed, and the second key parameter update flag signaling can be set to the first value, such as 1; otherwise, the second key parameter update flag signaling can be set to the second value, such as 0. It should be noted that if the second key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the second key parameter update flag signaling is repeated set to the second value.
  • the second key parameter update flag signaling can also be redefined as information used to indicate other APs in the RNR element about the second AP multi-link device except the transmitting AP (for example, including channel information, key parameter update value , one or more of the link identifier, etc.), or the information of the non-transmitting AP (such as including one or more of the key parameter update value, the link identifier, etc.) has changed.
  • the transmitting AP for example, including channel information, key parameter update value , one or more of the link identifier, etc.
  • the information of the non-transmitting AP such as including one or more of the key parameter update value, the link identifier, etc.
  • the second key parameter update flag signaling as used to indicate that the information of other APs of the second AP multi-link device except the transmitting AP has changed (or described as the second AP multi-link device's
  • the information of other APs other than the transmitting AP is reconfigured), or the key parameter update value of the other AP has been changed, or the key parameter update value of the non-transmitting AP has been changed.
  • the information (or described as reconfiguration information) of APs other than the transmitting AP of the second AP multilink device may be carried in a management frame, and the management frame carries an RNR element.
  • the second key parameter update flag signaling can be another independent signaling, carried in a beacon frame, a probe response frame, or other management frames, such as in the non-transmission BSSID capability information field (the non- in the non-transmit-BSSID-capabilities field of the transmit-BSSID-capabilities element).
  • the independent signaling no longer includes the change of the update value of the associated parameter in the information of other APs of the second AP multi-link device, and no longer includes the change of the information of the second AP. That is to say, the meaning of the existing second key parameter update flag signaling is not included.
  • the information change (or reconfiguration) of the AP of the second AP multi-link device it can be understood as one or more of the following:
  • the information of the AP does not appear in the RNR element, and the link identifier included in the information of the AP is removed.
  • the information shown in FIG. 2 and FIG. 3 belongs to a type of information change of the AP.
  • the information of the AP is newly added to the RNR element, including the link identifier in the newly added information of the AP.
  • the information shown in FIG. 2 and FIG. 3 belongs to a type of information change of the AP.
  • One or more APs in the second multi-link device are in the state of disabling/enabling, and the information belonging to the AP changes.
  • 1-bit information signaling included in the AP information indicates whether the AP is in a disabled state or in an enabled state.
  • the 1-bit information may be located in the MLD parameter field in the RNR element, further speaking, in the link identification field of the MLD parameter field.
  • the link identification field includes a 4-bit link identification and a 1-bit information signaling field, and the 1-bit information signaling field is used to indicate whether the reported AP is in an enabled state or a disabled state; set the first value, For example, 0 indicates that the reported AP is in an enabled state; setting the first value, such as 1, indicates that the reported AP is in a disabled state; and vice versa. Since the MLD parameter field is newly added in the 802.11be generation standard, traditional stations cannot recognize the newly added MLD parameter field, and thus cannot know its meaning.
  • the 1-bit information may be located in the TBTT information field type in the TBTT information header field in the RNR element. For example, if the TBTT information field type field is set to "0", the AP is in the enabled state; if the TBTT information field type field is set to another value, such as "1", the AP is in the disabled state at this time; Note that in the current RNR element, only the value of 0 is used for the 2-bit TBTT information field type field, and the other 3 values are unused or reserved.
  • the 1-bit information can be located in the reserved field in the TBTT information header field in the RNR element, set the first value, such as 0, indicating that the reported AP is in an enabled state; set the first value, such as 1, indicating that it is reported The AP is in the disabled state; and vice versa.
  • This method can also prevent the traditional station from identifying the information of the reported AP, thereby preventing the traditional station from scanning the reported AP or disassociated from the reported AP. Solve the problems of traditional sites. Among them, traditional sites include unassociated sites and, of course, associated sites.
  • the methods 1), 2) and 3) are all applicable to the new site of the EHT generation, or the site of the next generation.
  • the working links (such as corresponding channel numbers and operation sets) of one or more APs in the second multi-link device are replaced.
  • the channel information of the AP is changed, including the channel number and or operation set.
  • it also includes that the link identifier has been changed.
  • the second key parameter update flag signaling when used to indicate the information in the RNR element about the second AP multi-link device other than the transmitting AP (for example, including channel information, key parameter update value, link identification, etc.), the second key parameter update flag signaling can be set to the first value, such as 1; or, when the information of the non-transmitting AP has changed (such as including key parameter update values, link identification, etc.), the second The second key parameter update flag signaling is set to a first value, such as 1; otherwise, the second key parameter update flag signaling is set to a second value, such as 0. It should be noted that if the second key parameter update flag signaling is set to the first value, this value needs to be kept until the next DTIM beacon frame, and after the DTIM beacon frame, the second key parameter update flag signaling is repeated set to the second value.
  • the first STA can further analyze the RNR element in the management frame where the second key parameter update flag signaling is located, and further determine whether other APs in the second AP multi-link device have changed channels, and if so, obtain the The channel change information of the AP that has undergone channel change, so that the STA associated with the AP that has undergone channel change in the multi-link device that belongs to the same STA as the first STA obtains the channel change information.
  • the first STA may also further analyze the management frame to determine whether an update value of a key parameter of the AP changes.
  • the first STA may also analyze the management frame after receiving the management frame including the second key parameter update flag signaling sent by the first AP, and based on the second associated parameter update flag signaling in the management frame, the STA may The link device may obtain information about changes of other APs, or updated values of key parameters changed by other APs, or updated values of key parameters changed by non-transmitting APs.
  • this embodiment of the present application also provides a communication method. As shown in FIG. 13 , the method may include:
  • Step 1301 the first AP generates a management frame.
  • the management frame may include a multi-link (multi-link, ML) element.
  • the ML element may include channel change information of the AP whose channel has changed. And continue until the next sending DTIM beacon frame sent by the first AP.
  • the ML element may include channel change information of APs that have undergone channel change, and the ML element may continue until the next message sent by the first AP.
  • the ML element can include the channel change information of the APs that have changed channels, and continue until the next DTIM beacon frame sent by the first AP is
  • the following embodiments are also applicable to APs including the first AP that have undergone channel changes in the first AP multi-link device, and the ML element may include the APs that have undergone channel changes. Channel change information, and continue until the next DTIM beacon frame sent by the first AP.
  • the ML element may include an element ID (identier) field, a length field, an element ID extension field, a multi-link control field, a common information field, and a link information field.
  • the link information field may include several per-STA summary information fields, and each per-STA summary information field may include a subelement ID field, a length field, an STA control field, an STA information field, and an STA summary field.
  • the channel change information is an element related to channel change
  • the first AP carries the element related to channel change in the STA summary field in the ML element.
  • the relevant elements of the channel change may include a channel change element, or an extended channel change element, which is used to indicate that the reported AP has undergone a channel change until the next DTIM beacon frame.
  • the channel change-related elements also include a channel change count field, which indicates that the station that sent the channel change element or extended channel change element changes to a new channel, or the number of TBTT remaining in the new operation set and the new channel.
  • the channel change count When the channel change count When the value of the field is the first value, such as 1, the channel change count field can be used to indicate that the channel change will occur immediately before the target transmission time of the next beacon frame; when the value of the channel change count field is the second value When , such as 0, the channel change count field can be used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the first AP when another AP in the first AP multi-link device has a channel change, and after the channel change of the AP is completed, when the first AP sends a management frame, it still carries in the STA summary field of the ML element of the management frame
  • the elements related to the channel change of the AP after the channel change occurs until the next DTIM beacon frame, so that the first STA can obtain the elements related to the channel change of the AP that has undergone the channel change according to the management frame, so that the first STA belongs to
  • the STA associated with the AP that has changed the channel obtains the elements related to the channel change.
  • the value of the channel change count field can be the second value, such as 0, which is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the channel change information is channel information
  • the first AP carries the channel information in the STA information field in the ML element.
  • the channel information may include an operation set and a channel number; or, the channel information may include a channel number.
  • the first AP when another AP in the first AP multi-link device has undergone a channel change, and after the AP channel change is completed, when the first AP sends a management frame, it is still in the STA information field of the ML element of the management frame Carry the channel information of the AP after the channel change occurs until the next DTIM beacon frame, so that the first STA can obtain the channel information of the AP that has undergone the channel change according to the management frame, so that the STA and the first STA belong to the same STA In the link device, the STA associated with the AP whose channel has changed obtains the channel information.
  • Step 1302 the first AP sends a management frame to the first station STA.
  • the first STA receives the management frame.
  • Step 1303 the first STA obtains channel change information according to the ML element, so that the STA associated with the AP after channel change obtains channel change information in the same STA multi-link device as the first STA.
  • the first STA parses the STA summary field in the ML element of the management frame (such as the DTIM beacon frame) to obtain the channel change correlation of the AP that has changed the channel in the first AP multi-link device.
  • elements so that the first STA belongs to the same STA multi-link device, and the STA associated with the AP that has changed the channel obtains the elements related to the channel change.
  • the value of the channel change count field may be the second value, which is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the first STA parses the STA information field in the ML element of the management frame (such as the DTIM beacon frame) to obtain the channel information of the AP whose channel has changed in the first AP multi-link device so that the STA associated with the AP that has changed the channel in the multi-link device that belongs to the same STA as the first STA obtains the channel information.
  • the management frame such as the DTIM beacon frame
  • the STA multi-link device includes STA1 and STA2, and establishes a multi-link connection with the first AP multi-link device, wherein STA1 and STA2 are respectively associated to the first AP multi-link Take AP1 and AP2 of the device as an example. Assuming that STA1 is in a dormant state, STA 2 observes its working link 2, and STA 2 wakes up only at the time point of the DTIM beacon frame on link 2.
  • AP2 can transmit the second beacon frame and the third beacon frame on link 2 (respectively in Figure 15
  • the ML elements in the first TIM beacon frame and the second DTIM beacon frame) carry channel change information.
  • STA2 can know that the AP1 on road 1 has completed the channel change and obtained the channel change information, so that STA1 associated with AP1 obtains the channel change information of AP1, thereby ensuring normal communication between STA1 and AP1.
  • the first AP is located in the multi-BSSID set, the first AP is a transmitting AP, and the ML element in the management frame sent may also include the channels of other APs in the multi-link device of the second AP after the channel change occurs Change the information, and continue until the first STA receives the next DTIM beacon frame sent by the first AP.
  • the other APs in the second AP multi-link device may be other APs in the second multi-link device except the transmitting AP.
  • the STA when another AP in the second AP multi-link device has a channel change, and after the AP channel change is completed, when the first AP sends a management frame, the STA still summarizes the ML element of the management frame
  • the field carries elements related to the channel change of the AP after the channel change in the second AP multi-link device until the next DTIM beacon frame, so that the first STA can obtain the channel change of the AP that has changed the channel according to the management frame
  • the STA associated with the AP that has changed the channel in the multi-link device that belongs to the same STA as the first STA obtains the elements related to the channel change.
  • the value of the channel change count field may be the second value, which is used to indicate that the channel change will occur at any time after the management frame is sent or the channel change has already occurred.
  • the ML element of the management frame is still
  • the STA information field carries the channel information of the AP after the channel change in the second AP multi-link device until the next DTIM beacon frame, so that the first STA can obtain the channel information of the AP that has changed the channel according to the management frame,
  • the channel information is obtained by the STA associated with the AP whose channel has changed in the same STA multi-link device as the first STA.
  • the first AP when the first AP sends a management frame, it carries the channel of the AP whose channel has changed in the first AP multi-link device or the second AP multi-link device in the ML element of the management frame.
  • the change information can enable the first STA associated with the first AP to determine the channel change information of the AP that has undergone channel change according to the ML element, so that the first STA belongs to the same STA multi-link device, and the channel change information that has occurred
  • the STA associated with the changed AP learns that the associated AP has undergone a channel change and the channel change information after the channel change occurs.
  • each device includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • each device may be divided according to the above method example.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 16 shows a first AP
  • the first AP 160 may include a processing module 1601 and a transceiver module 1602 .
  • the first AP 160 may be the first AP, or may be a chip applied in the first AP, or other combined devices, components, etc. having the functions of the above-mentioned first AP.
  • the processing module 1601 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs; the transceiver module 1602 may be a transceiver,
  • the device can include antenna and radio frequency circuit etc.
  • the processing module 1601 may be a processor (or, a processing circuit), such as a baseband processor; the transceiver module 1602 may be a radio frequency unit.
  • the processing module 1601 can be a processor (or processing circuit) of the chip system, and can include one or more central processing units; the transceiver module 1602 can be an input and output of a chip (such as a baseband chip) interface.
  • processing module 1601 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or called a processing circuit); the transceiver module 1602 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 1601 may be used to perform all the operations performed by the first AP in the embodiments shown in FIGS.
  • the transceiving module 1602 may be used to perform all the transceiving operations performed by the first AP in the embodiments shown in FIGS. 8-15 , and/or other processes for supporting the technology described herein.
  • the processing module 1601 in FIG. 16 can be replaced by a processor, and the processor can integrate the functions of the processing module 1601; the transceiver module 1602 can be replaced by a transceiver, and the transceiver can integrate the functions of the transceiver module 1602 Function.
  • the first AP 160 shown in FIG. 16 may further include a memory.
  • the processing module 1601 is replaced by a processor, and the transceiver module 1602 is replaced by a transceiver, the first AP 160 involved in this embodiment of the present application may be the communication device shown in FIG. 7 .
  • FIG. 17 shows a first STA
  • the first STA 170 may include a transceiver module 1701 and a processing module 1702 .
  • the first STA 170 may be the first STA, or may be a chip applied in the first STA, or other combined devices, components, etc. having the functions of the above-mentioned first STA.
  • the transceiver module 1701 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc.; the processing module 1702 may be a processor (or, a processing circuit), such as a baseband processor, a baseband processor can include one or more CPUs.
  • the transceiver module 1701 may be a radio frequency unit; the processing module 1702 may be a processor (or, a processing circuit), such as a baseband processor.
  • the transceiver module 1701 may be an input and output interface of a chip (such as a baseband chip); the processing module 1702 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units. unit. It should be understood that the transceiver module 1701 in the embodiment of the present application may be implemented by a transceiver or a transceiver-related circuit component; the processing module 1702 may be implemented by a processor or a processor-related circuit component (or called a processing circuit).
  • the transceiving module 1701 may be used to perform all the transceiving operations performed by the first STA in the embodiments shown in FIGS. It is used to perform all the operations performed by the first STA in the embodiments shown in FIGS. 8-15 except the transceiving operation, and/or other processes used to support the technology described herein.
  • the transceiver module 1701 in FIG. 17 can be replaced by a transceiver, and the transceiver can integrate the functions of the transceiver module 1701; Function.
  • the first STA170 shown in FIG. 17 may further include a memory.
  • the transceiver module 1701 is replaced by a transceiver and the processing module 1702 is replaced by a processor, the first STA 170 involved in this embodiment of the present application may be the communication device shown in FIG. 7 .
  • the embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer programs to instruct related hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments .
  • the computer-readable storage medium may be an internal storage unit of the terminal (including the data sending end and/or the data receiving end) in any of the foregoing embodiments, such as a hard disk or memory of the terminal.
  • the above-mentioned computer-readable storage medium may also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash memory card (flash card) etc. Further, the above-mentioned computer-readable storage medium may also include both an internal storage unit of the above-mentioned terminal and an external storage device.
  • the above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal.
  • the computer-readable storage medium described above can also be used to temporarily store data that has been output or will be output.
  • At least one (item) means one or more
  • “multiple” means two or more
  • at least two (items) means two or three And three or more
  • "and/or” is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and/or B” can mean: only A exists, only B exists, and A exists at the same time and B, where A and B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c ", where a, b, c can be single or multiple.
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be Incorporation or may be integrated into another device, or some features may be omitted, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be one physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places . Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

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Abstract

本申请实施例提供了一种通信方法及装置，涉及通信技术领域，能够改善在传输AP发送管理帧之前，若某一AP已经完成了信道变更，则传输AP不会携带该AP的参数元素，导致与该AP关联的STA就无法获知该AP发生了信道变更的技术问题。方法包括：第一AP生成管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；第一AP向第一站点STA发送管理帧。

Description

通信方法及装置
本申请要求于2021年05月26日提交国家知识产权局，申请号为202110581012.8，发明名称为“通信方法及装置”的中国专利申请的优先权和于2021年07月20日提交国家知识产权局，申请号为202110821657.4，发明名称为“通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其是涉及一种通信方法及装置。
背景技术
现有无线局域网(wireless local area network，WLAN)通信系统中，为了提高传输效率，提出了一种可以支持多条链路并行通信的多链路设备，其中，多链路设备可以包括一个或多个站点，当站点为接入点(access point，AP)时，多链路设备可以称为AP多链路设备；当站点为非接入点站点(non-access point station，non-AP STA)时，non-AP STA也可以简述为STA，多链路设备也可以称为STA多链路设备。
其中，对于各个AP，可以基于基本服务集标识(basic service set identifier，BSSID)，将BSSID为传输BSSID的AP称为传输AP，将BSSID为非传输BSSID的AP称为非传输AP。
目前，当与AP多链路设备中的某一AP关联的STA处于休眠状态，其中该STA属于non-AP多链路设备，且该AP正在发生信道变更时(此时该AP在其工作的链路上发送的信标帧中携带信道变更相关的元素；如果该AP是多BSSID集合中的非传输BSSID的AP，此时其对应的传输AP发送的信标帧中携带该AP的信道变更相关的元素)，来自于同一个AP多链路设备的其他AP(如果该AP是多BSSID集合中的非传输BSSID的AP，则该其他AP是其多BSSID集合中的传输AP)可以将该AP的信道变更相关的元素携带在管理帧中，由该其他AP关联的STA(隶属于同一个non-AP多链路设备)会获知该AP正在发生信道变更，从而隶属于同一non-AP多链路设备的STA也就获知该信息。
但是，如果在隶属于同一个AP多链路设备的其他AP发送管理帧之前，该AP已经完成了信道变更，则该其他AP(或者也可以描述为汇报AP)不会携带该AP的信道变更相关的元素，即上述non-AP多链路设备就无法获知该AP发生了信道变更。
发明内容
有鉴于此，本申请实施例提供了一种通信方法及装置，能够改善在传输AP发送管理帧之前，若某一AP已经完成了信道变更，则传输AP不会携带该AP的参数元素，导致与该AP关联的STA就无法获知该AP发生了信道变更的技术问题。
第一方面，本申请实施例提供了一种通信方法，方法包括：第一接入点AP生成管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；第一AP向第一站点STA发送管理帧。
基于第一方面，第一AP发送管理帧时，通过携带第一指示信息，可以指示第一AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD 的第一STA根据第一指示信息确定第一AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，能力信息字段还包括第一关键参数更新标志信令；其中，第一关键参数更新标志信令用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化；当第一AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第一AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第一关键参数更新标志信令的取值不变。
基于该可能的设计，对于第一AP多链路设备，无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致AP的关键参数更新值的取值发生变化，即无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致第一关键参数更新标志信令的取值发生变化。
一种可能的设计中，当第一AP多链路设备中的AP对应的关键基本服务集合BSS参数事件中的任一事件发生时，第一AP调整AP的关键参数更新值的取值。
一种可能的设计中，关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
一种可能的设计中，关键BSS参数事件不包括下述事件中的任一事件：包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素、包括静态信道元素。
基于上述三种可能的设计，与802.11ax标准相比，通过将包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素和包括静态信道元素从关键BSS参数事件中去除，可以避免与第一AP多链路设备关联的STA多链路设备根据管理帧中的RNR元素和多链路元素，获取重复的AP的信道变更相关的元素，从而降低STA多链路设备的功耗，节约空口传输机会。
一种可能的设计中，管理帧还包括非传输基本服务集标识BSSID字段，非传输BSSID字段包括第二指示信息；其中，第二指示信息用于指示第二AP多链路设备中是否有其他AP已发生信道变更，第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。其中非传输BSSID字段位于Multiple BSSID元素中的非传输BSSID概括子元素中的非传输BSSID能力元素中，非传输BSSID字段也可以称为非传输BSSID能力字段，或者其他名字。
基于该可能的设计，第一AP发送管理帧时，通过携带第二指示信息，可以指示第二AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD的第一STA根据第二指示信息确定第二AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知 其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，非传输BSSID字段包括第二关键参数更新标志信令；其中，第二关键参数更新标志信令用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化；当第二AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第二AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第二关键参数更新标志指令的取值不变。
基于该可能的设计，对于第二AP多链路设备，无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致AP的关键参数更新值的取值发生变化，即无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致第二关键参数更新标志信令的取值发生变化。
一种可能的设计中，当第二AP多链路设备中的AP对应的关键BSS参数事件中的任一事件发生时，第一AP调整AP的关键参数更新值的取值。
基于该可能的设计，与802.11ax标准相比，通过将包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素和包括静态信道元素从关键BSS参数事件中去除，可以避免与第一AP多链路设备关联的STA多链路设备根据管理帧中的RNR元素和多链路元素，获取重复的AP的信道变更相关的元素，从而降低STA多链路设备的功耗，节约空口传输机会。
第二方面，本申请实施例提供了一种第一AP，第一AP可以实现上述第一方面或者第一方面可能的设计中第一AP所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如，处理模块和收发模块。处理模块，用于生成管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；收发模块，用于向第一站点STA发送管理帧。
一种可能的设计中，能力信息字段还包括第一关键参数更新标志信令；其中，第一关键参数更新标志信令用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化；当第一AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第一AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第一关键参数更新标志信令的取值不变。
一种可能的设计中，处理模块，还用于当第一AP多链路设备中的AP对应的关键基本服务集合BSS参数事件中的任一事件发生时，调整AP的关键参数更新值的取值。
一种可能的设计中，关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
一种可能的设计中，关键BSS参数事件不包括下述事件中的任一事件：包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素、包括静态信道元素。
一种可能的设计中，管理帧还包括非传输基本服务集标识BSSID字段，非传输BSSID 字段包括第二指示信息；其中，第二指示信息用于指示第二AP多链路设备中是否有其他AP已发生信道变更，第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
一种可能的设计中，非传输BSSID字段包括第二关键参数更新标志信令；其中，第二关键参数更新标志信令用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化；当第二AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第二AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第二关键参数更新标志指令的取值不变。
一种可能的设计中，处理模块，还用于当第二AP多链路设备中的AP对应的关键BSS参数事件中的任一事件发生时，调整AP的关键参数更新值的取值。
需要说明的是，第二方面中第一AP的具体实现方式可参考第一方面或第一方面的任一种可能的设计提供的通信方法中第一AP的行为功能。
第三方面，本申请实施例提供了一种第一AP，该第一AP可以为第一AP或者第一AP中的芯片或者片上系统。该第一AP可以实现上述各方面或者各可能的设计中第一AP所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该第一AP可以包括：处理器和收发器。处理器和收发器可以用于支持第一AP实现上述第一方面或者第一方面的任一种可能的设计中所涉及的功能。例如：处理器可以用于生成管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；收发器可以用于向第一站点STA发送管理帧。在又一种可能的设计中，所述第一AP还可以包括存储器，存储器，用于保存第一AP必要的计算机执行指令和数据。当该第一AP运行时，该收发器和处理器执行该存储器存储的该计算机执行指令，以使该第一AP执行如上述第一方面或者第一方面的任一种可能的设计所述的通信方法。
其中，第三方面中第一AP的具体实现方式可参考第一方面或第一方面的任一种可能的设计提供的通信方法中第一AP的行为功能。
第四方面，本申请实施例提供了一种通信方法，该方法包括：第一站点STA接收来自第一接入点AP的管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；当第一指示信息用于指示第一AP多链路设备中有其他AP已发生信道变更，第一STA获取发生信道变更后的AP的信道变更信息，使得STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
基于第四方面，第一AP发送管理帧时，通过携带第一指示信息，可以指示第一AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD的第一STA根据第一指示信息确定第一AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，能力信息字段还包括第一关键参数更新标志信令；其中，第一关 键参数更新标志信令用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化；当第一AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第一AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第一关键参数更新标志信令的取值不变。
基于该可能的设计，对于第一AP多链路设备，无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致AP的关键参数更新值的取值发生变化，即无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致第一关键参数更新标志信令的取值发生变化。
一种可能的设计中，第一AP多链路设备中的AP的关键参数更新值的取值，根据AP对应的关键基本服务集合BSS参数事件中任一事件的发生进行调整。
一种可能的设计中，关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
一种可能的设计中，关键BSS参数事件不包括下述事件中的任一事件：包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素、包括静态信道元素。
基于上述三种可能的设计，与802.11ax标准相比，通过将包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素和包括静态信道元素从关键BSS参数事件中去除，可以避免与第一AP多链路设备关联的STA多链路设备根据管理帧中的RNR元素和多链路元素，获取重复的AP的信道变更相关的元素，从而降低STA多链路设备的功耗，节约空口传输机会。
一种可能的设计中，管理帧还包括非传输基本服务集标识BSSID字段，非传输BSSID字段包括第二指示信息；其中，第二指示信息用于指示第二AP多链路设备中是否有其他AP已发生信道变更，第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
一种可能的设计中，当第二指示信息用于指示第二AP多链路设备中有AP已发生信道变更，第一STA获取发生信道变更后的AP的信道变更信息，使得STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
基于上述两种可能的设计，第一AP发送管理帧时，通过携带第二指示信息，可以指示第二AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD的第一STA根据第二指示信息确定第二AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，非传输BSSID字段包括第二关键参数更新标志信令；其中，第二关键参数更新标志信令用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化；当第二AP多链路设备有A发送的管理帧包括信道变更相关的元素，或者，当第二 AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第二关键参数更新标志指令的取值不变。
基于该可能的设计，对于第二AP多链路设备，无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致AP的关键参数更新值的取值发生变化，即无论AP发送的管理帧是否包括信道变更相关的元素，都不会导致第二关键参数更新标志信令的取值发生变化。
一种可能的设计中，第二AP多链路设备中的AP的关键参数更新值的取值，根据AP对应的关键BSS参数事件中任一事件的发生进行调整。
基于该可能的设计，与802.11ax标准相比，通过将包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素和包括静态信道元素从关键BSS参数事件中去除，可以避免与第一AP多链路设备关联的STA多链路设备根据管理帧中的RNR元素和多链路元素，获取重复的AP的信道变更相关的元素，从而降低STA多链路设备的功耗，节约空口传输机会。
第五方面，本申请实施例提供了一种第一STA，第一STA可以实现上述第四方面或者第四方面可能的设计中第一STA所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如，收发模块和处理模块。收发模块，用于接收来自第一接入点AP的管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；当第一指示信息用于指示第一AP多链路设备中有其他AP已发生信道变更，处理模块，用于获取发生信道变更后的AP的信道变更信息，使得STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
一种可能的设计中，能力信息字段还包括第一关键参数更新标志信令；其中，第一关键参数更新标志信令用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化；当第一AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第一AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第一关键参数更新标志信令的取值不变。
一种可能的设计中，第一AP多链路设备中的AP的关键参数更新值的取值，根据AP对应的关键基本服务集合BSS参数事件中任一事件的发生进行调整。
一种可能的设计中，关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
一种可能的设计中，关键BSS参数事件不包括下述事件中的任一事件：包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素、包括静态信道元素。
一种可能的设计中，管理帧还包括非传输基本服务集标识BSSID字段，非传输BSSID字段包括第二指示信息；其中，第二指示信息用于指示第二AP多链路设备中是否有其他 AP已发生信道变更，第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
一种可能的设计中，当第二指示信息用于指示第二AP多链路设备中有AP已发生信道变更，处理模块，还用于获取发生信道变更后的AP的信道变更信息，使得STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
一种可能的设计中，非传输BSSID字段包括第二关键参数更新标志信令；其中，第二关键参数更新标志信令用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化；当第二AP多链路设备有AP发送的管理帧包括信道变更相关的元素，或者，当第二AP多链路设备中AP发送的管理帧没有包括信道变更相关的元素，第二关键参数更新标志指令的取值不变。
一种可能的设计中，第二AP多链路设备中的AP的关键参数更新值的取值，根据AP对应的关键BSS参数事件中任一事件的发生进行调整。
需要说明的是，第五方面中第一STA的具体实现方式可参考第四方面或第四方面的任一种可能的设计提供的通信方法中第一STA的行为功能。
第六方面，本申请实施例提供了一种第一STA，该第一STA可以为第一STA或者第一STA中的芯片或者片上系统。该第一STA可以实现上述各方面或者各可能的设计中第一STA所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该第一STA可以包括：收发器和处理器。收发器和处理器可以用于支持第一STA实现上述第四方面或者第四方面的任一种可能的设计中所涉及的功能。例如：收发器可以用于接收来自第一接入点AP的管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；当第一指示信息用于指示第一AP多链路设备中有其他AP已发生信道变更，处理器可以用于获取发生信道变更后的AP的信道变更信息，使得STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。在又一种可能的设计中，所述第一STA还可以包括存储器，存储器，用于保存第一STA必要的计算机执行指令和数据。当该第一STA运行时，该收发器和处理器执行该存储器存储的该计算机执行指令，以使该第一STA执行如上述第四方面或者第四方面的任一种可能的设计所述的通信方法。
其中，第六方面中第一STA的具体实现方式可参考第四方面或第四方面的任一种可能的设计提供的通信方法中第一STA的行为功能。
第七方面，本申请实施例提供了一种通信方法，方法包括：第一AP生成管理帧；其中，当第一AP多链路设备中有AP发生信道变更后，管理帧包括ML元素，ML元素包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；第一AP向第一站点STA发送管理帧。
基于第七方面，第一AP发送管理帧时，通过在ML元素中携带信道变更信息，可以指示第一AP多链路设备中已发生信道变更的AP的信道变更信息，使得与第一AP关联的第一STA根据ML元素确定已发生信道变更的AP的信道变更信息，进而使得与已发生信道变更的AP关联的STA获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，当第二AP多链路设备中有AP发生信道变更后，ML元素还包括第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个DTIM信标帧；第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
基于该可能的设计，第一AP发送管理帧时，还可以指示第二AP多链路设备中已发生信道变更的AP的信道变更信息，使得与第一AP关联的第一STA根据ML元素确定已发生信道变更的AP的信道变更信息，进而使得与已发生信道变更的AP关联的STA获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，信道变更信息包括信道变更相关的元素；或者，信道变更信息包括AP变更后的操作集和信道号；或者，信道变更信息包括AP变更后的信道号。
基于该可能的设计，信道变更信息可以包括信道变更相关的元素，也可以包括AP变更后的操作集和信道号，不予限制。
一种可能的设计中，管理帧还包括信道变更计数字段；其中，当信道变更计数字段的取值为第一取值时，信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当信道变更计数字段的取值为第二取值时，信道变更计数字段用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
基于上述可能的设计，与802.11ax标准不同，当第一AP多链路设备中有AP已发生信道变更，且在该AP信道变更完成后，第一AP发送管理帧时，仍在管理帧的ML元素中携带发生信道变更后的AP的信道变更信息，直到下一个DTIM信标帧，从而使得STA多链路设备中的STA获知已发生信道变更的AP的信道变更信息。此时，信道变更计数字段的取值可以为第二取值，即用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
第八方面，本申请实施例提供了一种第一AP，第一AP可以实现上述第七方面或者第七方面可能的设计中第一AP所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如，处理模块和收发模块。处理模块，用于生成管理帧；其中，当第一AP多链路设备中有AP发生信道变更后，管理帧包括ML元素，ML元素包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；收发模块，用于向第一站点STA发送管理帧。
一种可能的设计中，当第二AP多链路设备中有AP发生信道变更后，ML元素还包括第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个DTIM信标帧；第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
一种可能的设计中，信道变更信息包括信道变更相关的元素；或者，信道变更信息包括AP变更后的操作集和信道号；或者，信道变更信息包括AP变更后的信道号。
一种可能的设计中，管理帧还包括信道变更计数字段；其中，当信道变更计数字段的取值为第一取值时，信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当信道变更计数字段的取值为第二取值时，信道变更计数字段用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
需要说明的是，第八方面中第一AP的具体实现方式可参考第七方面或第七方面的任一种可能的设计提供的通信方法中第一AP的行为功能。
第九方面，本申请实施例提供了一种第一AP，该第一AP可以为第一AP或者第一AP中的芯片或者片上系统。该第一AP可以实现上述各方面或者各可能的设计中第一AP所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该第一AP可以包括：处理器和收发器。处理器可以用于生成管理帧；其中，当第一AP多链路设备中有AP发生信道变更后，管理帧包括ML元素，ML元素包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；收发器可以用于向第一站点STA发送管理帧。在又一种可能的设计中，所述第一AP还可以包括存储器，存储器，用于保存第一AP必要的计算机执行指令和数据。当该第一AP运行时，该收发器和处理器执行该存储器存储的该计算机执行指令，以使该第一AP执行如上述第七方面或者第七方面的任一种可能的设计所述的通信方法。
其中，第九方面中第一AP的具体实现方式可参考第七方面或第七方面的任一种可能的设计提供的通信方法中第一AP的行为功能。
第十方面，本申请实施例提供了一种通信方法，该方法包括：第一站点STA接收来自第一接入点AP的管理帧；其中，管理帧包括ML元素，ML元素包括第一AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一STA接收到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；第一STA根据ML元素获取信道变更信息，以使STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
基于第十方面，第一AP发送管理帧时，通过在ML元素中携带信道变更信息，可以指示第一AP多链路设备中已发生信道变更的AP的信道变更信息，使得与第一AP关联的第一STA根据ML元素确定已发生信道变更的AP的信道变更信息，进而使得与已发生信道变更的AP关联的STA获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，ML元素还包括第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一STA接收到第一AP发送的下一个发送业务指示图DTIM信标帧；第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
基于该可能的设计，第一AP发送管理帧时，还可以指示第二AP多链路设备中已发生信道变更的AP的信道变更信息，使得与第一AP关联的第一STA根据ML元素确定已发生信道变更的AP的信道变更信息，进而使得与已发生信道变更的AP关联的STA获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
一种可能的设计中，信道变更信息包括信道变更相关的元素；或者，信道变更信息包括AP变更后的操作集和信道号；或者，信道变更信息包括AP变更后的信道号。
基于该可能的设计，信道变更信息可以包括信道变更相关的元素，也可以包括AP变更后的操作集和信道号，不予限制。
一种可能的设计中，管理帧还包括信道变更计数字段；其中，当信道变更计数字段的取值为第三取值时，信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当信道变更计数字段的取值为第四取值时，信道变更计数字段用于指示信 道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
基于上述可能的设计，与802.11ax标准不同，当第一AP多链路设备中有AP已发生信道变更，且在该AP信道变更完成后，第一AP发送管理帧时，仍在管理帧的ML元素中携带发生信道变更后的AP的信道变更信息，直到下一个DTIM信标帧，从而使得STA多链路设备中的STA获知已发生信道变更的AP的信道变更信息。此时，信道变更计数字段的取值可以为第二取值，即用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
第十一方面，本申请实施例提供了一种第一STA，第一STA可以实现上述第十方面或者第十方面可能的设计中第一STA所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如，收发模块和处理模块。收发模块，用于接收来自第一接入点AP的管理帧；其中，管理帧包括ML元素，ML元素包括第一AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一STA接收到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；处理模块，用于根据ML元素获取信道变更信息，以使STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
一种可能的设计中，ML元素还包括第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一STA接收到第一AP发送的下一个发送业务指示图DTIM信标帧；第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。
一种可能的设计中，信道变更信息包括信道变更相关的元素；或者，信道变更信息包括AP变更后的操作集和信道号；或者，信道变更信息包括AP变更后的信道号。
一种可能的设计中，管理帧还包括信道变更计数字段；其中，当信道变更计数字段的取值为第三取值时，信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当信道变更计数字段的取值为第四取值时，信道变更计数字段用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
其中，第十一方面中第一STA的具体实现方式可参考第十方面或第十方面的任一种可能的设计提供的通信方法中第一STA的行为功能。
第十二方面，本申请实施例提供了一种第一STA，该第一STA可以为第一STA或者第一STA中的芯片或者片上系统。该第一STA可以实现上述各方面或者各可能的设计中第一STA所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该第一STA可以包括：收发器。收发器可以用于支持第一STA实现上述第十方面或者第十方面的任一种可能的设计中所涉及的功能。例如：收发器可以用于接收来自第一接入点AP的管理帧；其中，管理帧包括ML元素，ML元素包括第一AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到第一STA接收到第一AP发送的下一个发送业务指示图DTIM信标帧；第一AP多链路设备包括第一AP；STA多链路设备包括第一STA；处理器用于根据ML元素获取信道变更信息，以使STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。在又一种可能的设计中，所述第一STA还可以包括存储器，存储器，用于保存第一STA必要的计算机执行指令和数据。当该第一STA运行时，该收发器和处理器执行该存储器存储的该计算机执行指令，以使该第一STA执行如上述第十方面或者第十方面的任一种可能的设计所述的通信方法。
其中，第十二方面中第一STA的具体实现方式可参考第十方面或第十方面的任一种可能的设计提供的通信方法中第一STA的行为功能。
第十三方面，提供了一种通信装置，该通信装置包括一个或多个处理器以及一个或多个存储器，一个或多个存储器与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序或指令；一个或多个处理器，用于运行计算机程序或指令，当一个或多个处理器执行计算机指令或指令时，使得如第一方面或者第一方面的任一可能的设计所述的通信方法被执行；或者如第四方面或者第四方面的任一可能的设计所述的通信方法被执行；或者如第七方面或者第七方面的任一可能的设计所述的通信方法被执行；或者如第十方面或者第十方面的任一可能的设计所述的通信方法被执行。
在一种可能的实现方式中，存储器位于所述通信装置之外。在另一种可能的实现方式中，存储器位于所述通信装置之内。本申请实施例中，处理器和存储器还可能集成于一个器件中，即处理器和存储器还可以被集成在一起。
一种可能的设计中，该通信装置还包括一个或多个通信接口；一个或多个通信接口和一个或多个处理器耦合，一个或多个通信接口用于与通信装置之外的其它模块进行通信。通信接口；一个或多个通信接口和一个或多个处理器耦合。
第十四方面，提供了一种通信装置，该通信装置包括接口电路和逻辑电路；接口电路与逻辑电路耦合；逻辑电路用于执行如第一方面或者第一方面的任一可能的设计所述的通信方法；或者执行如第四方面或者第四方面的任一可能的设计所述的通信方法；或者执行如第七方面或者第七方面的任一可能的设计所述的通信方法；或者执行如第十方面或者第十方面的任一可能的设计所述的通信方法；接口电路用于与通信装置之外的其它模块进行通信。
第十五方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如第一方面或者第一方面的任一可能的设计所述的通信方法，或者执行如第四方面或者第四方面的任一可能的设计所述的通信方法；或者执行如第七方面或者第七方面的任一可能的设计所述的通信方法；或者执行如第十方面或者第十方面的任一可能的设计所述的通信方法。
第十六方面，提供了一种包含计算机指令的计算机程序产品，当其在计算机上运行时，使得如第一方面或者第一方面的任一可能的设计所述的通信方法被执行，或者如第四方面或者第四方面的任一可能的设计所述的通信方法被执行，或者如第七方面或者第七方面的任一可能的设计所述的通信方法被执行，或者如第十方面或者第十方面的任一可能的设计所述的通信方法被执行。
第十七方面，本申请实施例提供一种计算机程序，当其在计算机上运行时，使得如第一方面或者第一方面的任一可能的设计所述的通信方法被执行，或者如第四方面或者第四方面的任一可能的设计所述的通信方法被执行，或者如第七方面或者第七方面的任一可能的设计所述的通信方法被执行。
其中，第十三方面至第十七方面中任一种设计方式所带来的技术效果可参见上述第一方面的任一种可能的设计所带来的技术效果，或者参见上述第四方面的任一种可能的设计所带来的技术效果，或者参见上述第七方面的任一种可能的设计所带来的技术效果，或者参见上述第十方面的任一种可能的设计所带来的技术效果，不予赘述。
第十八方面，提供了一种通信系统，该通信系统包括如第二方面至第三方面的任一方面所述的第一AP和第五方面至第六方面的任一方面所述的第一STA；或者包括如第八方面至第九方面的任一方面所述的第一AP和第十一方面至第十二方面的任一方面所述的第一STA。
附图说明
图1为本申请实施例提供的一种多BSSID元素的帧格式示意图；
图2为本申请实施例提供的一种精简邻居汇报元素的帧格式示意图；
图3为本申请实施例提供的一种TBTT信息字段的帧格式示意图；
图4为本申请实施例提供的一种通信系统的结构示意图；
图5为本申请实施例提供的一种通信系统的结构示意图；
图6为本申请实施例提供的一种通信系统的结构示意图；
图7为本申请实施例提供的一种通信装置的结构示意图；
图8为本申请实施例提供的一种通信方法的流程图；
图9为本申请实施例提供的一种多链路元素的帧格式示意图；
图10为本申请实施例提供的一种信道变更相关的元素的帧格式示意图；
图11为本申请实施例提供的一种信号时序图；
图12为本申请实施例提供的一种多链路设备的结构示意图；
图13为本申请实施例提供的一种通信方法的流程图；
图14为本申请实施例提供的一种ML元素的帧格式示意图；
图15为本申请实施例提供的一种信号时序图；
图16为本申请实施例提供的一种第一AP的结构示意图；
图17为本申请实施例提供的一种第一STA的结构示意图。
具体实施方式
在描述本申请实施例之前，对本申请实施例涉及的技术术语进行描述。
为了大幅提升无线局域网(wireless local area network，WLAN)系统的业务传输速率，电气和电子工程师协会(institute of electrical and electronics engineers，IEEE)802.11ax标准在现有正交频分复用(orthogonal frequency division multiplexing，OFDM)技术的基础上，进一步采用正交频分多址(orthogonal frequency division multiple access，OFDMA)技术。OFDMA技术可以支持多个节点同时发送和接收数据，从而实现多站点分集增益。另外，美国联邦通信委员会(federal communications commission，FCC)开放了一段新的免费频段5925-7125MHz，下述简称该段频段为6GHz。于是，802.11ax设备工作范围从2.4GHz，5GHz拓展到2.4GHz，5GHz和6GHz等。
IEEE 802.11ax下一代WiFi协议-极高吞吐量(extremely high throughput，EHT)设备由于向前兼容，因此也会支持802.11ax设备的工作频谱，即会支持2.4GHz，5GHz和6GHz频段。IEEE 802.11ax下一代无线保真(wireless fidelity，WiFi)协议-EHT设备根据最新开放的免费的6GHz频段，基于该频段做信道划分，可支持的带宽超过在5GHz支持的最大带宽160MHz，比如320MHz。
除了通过超大带宽，IEEE 802.11ax下一代WiFi-EHT设备还可以通过更多的流数，比如流数增加到16流，以及多个频段(2.4GHz，5GHz和6GHz)合作等方式提高峰值吞吐 量。在同一频段上，还可以通过多个信道合作等方式提高峰值吞吐量，降低业务传输的时延。本文将多频段或多信道统称为多链路。
IEEE 802.11ax下一代WiFi-EHT设备中使用多链路合作技术把不连续的多链路聚合起来形成超大带宽。多链路合作技术除了聚合更大的带宽，还可以使用多链路合作技术同时发送同业务的数据包给同一个站点。
多基本服务集标识集合(multiple basic service set identifier set，可称多BSSID集合)：可理解是一些合作接入点(access point，AP)的集合。所有合作AP使用同一个操作集，信道号，以及天线接口。在该多BSSID集合中，只有一个传输(transmitted)BSSID的AP，其他的AP都为非传输(nontransmitted)BSSID的AP。多BSSID集合的信息(也就是多BSSID元素)携带于传输BSSID的AP发送的信标帧(beacon)或者探测响应帧(probe response)或邻居汇报。非传输BSSID的AP的BSSID的信息是由站点通过上述信标帧或者探测响应帧，或者Multiple BSSID元素等推导出来的，其中非传输BSSID的AP的BSSID是通过传输BSSID的AP的BSSID和其非传输BSSID对应的非传输BSSID概括子元素中的Multiple BSSID索引元素中的BSSID索引字段计算出来，具体方法请参考802.11-2020协议。
该多BSSID集合也可理解为由多个AP构成。每个AP管理一个BSS，不同AP可以具有不同的SSID以及权限，比如安全机制或者传输机会等。
其中，多BSSID集合中，只有BSSID为传输BSSID的AP可以发送信标帧和探测响应帧，而非传输BSSID的AP不发送信标帧，因此，若STA发送的探测请求帧是给Multiple BSSID集合中的一个BSSID为非传输BSSID的AP，则该Multiple BSSID集合中BSSID为传输BSSID的AP帮忙响应以发送探测响应帧。
其中，多BSSID集合的多个AP中，其中一个AP的BSSID被配置为传输BSSID，传输BSSID的AP可称为传输AP；其他AP的BSSID被配置为非传输BSSID，非传输BSSID的AP可称为非传输AP。
其中，传输AP发送的信标帧中可包括多BSSID元素，多BSSID元素的帧格式如图1所示，多BSSID元素可以包括元素ID字段，长度字段，最大BSSID指示字段，可选的子元素字段。其中，最大BSSID指示字段用于指示多BSSID集合中包含的BSSID的最大个数n，可选的子元素字段包括非传输BSSID的AP的BSSID的信息，具体为非传输BSSID概括子元素。
对于一个小范围的地域内支持多种业务多种类型的用户的通信场景，如果使用不同的独立的AP在一个小的地域范围内，每个独立AP都会试图寻找一段干净的信道，这样每个独立AP之间的信道干扰无法避免，而采用一个AP支持多BSSID的方式，即一个AP虚拟出多个AP针对于不同的业务类型或是客户类型，可以避免信道干扰。
站点要想与一个AP进行关联建立连接，首先需要通过扫描来发现该AP的存在。扫描有两种形式：主动扫描和被动扫描。
被动扫描是一种通过接收信道上AP发送的管理帧来发现AP的方式，管理帧可以为信标帧，关联响应帧，重关联响应帧，鉴权帧，探测响应帧等。
例如，站点可以在不同的信道上跳转来搜寻AP发送的信标帧的精简邻居汇报元素。一旦站点通过信标帧获得了该AP的邻居AP的基本信息，就可以进一步通过交互探测请 求(probe request)帧和探测响应帧以从AP获得其他额外信息。当然，站点可以在不同的信道上跳转来搜寻AP发送的信标帧，直接获知该AP的全部信息。
主动扫描是指站点可以在没听到信标帧的情况下主动发送一个广播的探测请求，收到探测请求帧的AP若满足一定条件可回复探测响应帧。
扫描过程中，为了辅助站点进行快速扫描，AP会在管理帧，例如，信标帧、探测响应帧中携带精简邻居汇报元素(reduced neighbor report element，RNR)来避免站点不停地扫描信道，减少站点的扫描时间。
精简邻居汇报元素：AP可以在管理帧中携带精简邻居汇报元素。站点进行扫描时，可以接收AP发送的管理帧，从而基于其中的精简邻居汇报元素获得周围的AP的信息，然后选择合适的AP进行关联。
具体来讲，精简邻居汇报元素一般会携带一个或者多个邻居AP信息(neighbor AP information)字段，用来描述一个或多个邻居AP以及其各自所属的BSS的信息，如图2所示，精简邻居汇报元素可以包括如下字段：信标帧目标传输时间信息头(target beacon transmission time information header，TBTT information header)字段、操作类别(operating class)字段、信道号(channel number)字段、TBTT信息集合字段。
其中，信标帧目标传输时间信息头字段可以包括TBTT信息字段类型(TBTT information field type)字段、过滤的邻居AP(filtered neighbor AP)字段、预留(reserved)字段、TBTT信息个数(TBTT information count)字段、TBTT信息长度(TBTT information length)字段。
TBTT信息字段类型可以用于指示TBTT信息的类型，其与TBTT信息长度字段一起用于指示TBTT信息字段的格式。过滤的邻居AP字段可以用于指示该邻居AP信息字段中所携带的所有BSS的SSID是否与探测响应帧中的SSID相匹配。预留字段的比特数可以为1。TBTT信息个数字段可以用于指示TBTT信息集合中含有TBTT信息字段的个数。TBTT信息长度字段可以用于指示每个TBTT信息字段的长度。不同长度下所携带的具体信息格式可以如下述表1所示：
表1
Figure PCTCN2022095191-appb-000001
Figure PCTCN2022095191-appb-000002
如图3所示，当TBTT信息长度为12字节时，TBTT信息字段可以包括：邻居AP的目标信标传输时间偏置(neighbor AP TBTT offset)字段：用于指示邻居AP与汇报AP的信标帧发送时间的偏置。BSSID字段：用于指示该邻居AP所对应的BSS标识符。短服务集标识(short SSID)字段：用于指示邻居AP所属的服务集标识符。BSS参数(BSS parameter)字段：用于指示邻居AP的相关参数。20MHz功率谱密度字段(power spectral density，PSD)：用来指示被汇报AP在主20MHz上传输的最大功率，以及多链路设备(multi-link device，MLD)参数字段。
其中，BSS参数字段可以包括：推荐使用随信道隧道机制(on channel tunnel recommended，OCT recommended)字段：用于指示该邻居AP期望通过OCT机制与其交换管理类型的媒体接入控制协议数据单元(media access control protocol data unit，MPDU)。相同服务集标识(same SSID)字段：用于指示该邻居AP和汇报AP是否具有相同的SSID。多基本服务集标识字段：用于指示该邻居AP是不是属于某个多BSSID集合的一部分。传输基本服务集标识字段：如果该邻居AP是属于某个多BSSID集合的一部分，则进一步指示该邻居AP是传输BSSID还是非传输BSSID。与2.4/5GHz AP共位置且为扩展服务集成员(member of ESS with 2.4/5GHz Co-located AP)字段：用于指示该邻居AP是否与一个2.4/5GHz AP共位置(即是不是仅为6GHz的AP)，且是一个扩展服务集的成员。主动探测响应活跃(unsolicited probe response active)字段：用于指示该邻居AP是否开启主动探测响应。共位置AP(Co-located AP)字段：用于指示邻居AP与汇报AP是否是共位置的。
其中，MLD参数字段可以包括MLD标识(identier，ID)字段：用来指示被汇报AP所隶属的AP MLD的标识；链路标识(link ID)：用来指示被汇报AP的链路标识，其中链路标识表征一个组合<操作集，信道号，AP的BSSID>；以及BSS参数变更计数(BSS parameter change count)字段：用来被被汇报AP的关键BSS参数变更次数，其中起始值为0。
需要说明的是，本申请实施例中在邻居汇报元素(neighbor report element)或者精简邻居汇报元素中描述的AP为被汇报AP(reported access point)，后续提到的邻居AP可以理解为被汇报AP；发送邻居汇报元素或者精简邻居汇报元素的AP为汇报AP(reporting access point)。
WLAN通信系统中，为了提高传输效率，提出了一种可以支持多条链路并行通信的多链路设备，其中，多链路设备可以包括一个或多个站点，站点可以是AP，也可以是非接入点站点(non-access point station，non-AP STA)，non-AP STA也可以简述为STA。
当与AP多链路设备中的某一AP关联的STA处于休眠状态，其中该STA属于non-AP多链路设备，且该AP正在发生信道变更时(此时该AP在其工作的链路上发送的信标帧中携带信道变更相关的元素；如果该AP是多BSSID集合中的非传输BSSID的AP，此时其对应的传输AP发送的信标帧中携带该AP的信道变更相关的元素)，来自于同一个AP多链路设备的其他AP(如果该AP是多BSSID集合中的非传输BSSID的AP，则该其他AP是其多BSSID集合中的传输AP)可以将该AP的信道变更相关的元素携带在管理帧中，由该其他AP关联的STA(隶属于同一个non-AP多链路设备)会获知该AP正在发 生信道变更，从而隶属于同一non-AP多链路设备的STA也就获知该信息。
但是，如果在隶属于同一个AP多链路设备的其他AP发送管理帧之前，该AP已经完成了信道变更，则该其他AP(或者也可以描述为汇报AP)不会携带该AP的信道变更相关的元素，即上述non-AP多链路设备就无法获知该AP发生了信道变更。
为解决该问题，本申请实施例提供了一种通信方法及装置，其中，第一AP生成管理帧；其中，管理帧包括能力信息字段，能力信息字段包括第一指示信息；第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；第一AP多链路设备包括第一AP；第一AP向第一站点STA发送管理帧。
本申请实施例中，第一AP发送管理帧时，通过携带第一指示信息，可以指示第一AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD的第一STA根据第一指示信息确定第一AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
下面结合说明书附图对本申请实施例的实施方式进行详细描述。
本申请实施例适用的无线通信系统可以为WLAN或蜂窝网，该通信方法可以由无线通信系统中的通信设备或通信设备中的芯片或处理器实现，该通信设备可以是一种支持多条链路并行进行传输的无线通信设备，例如，称为多链路设备(multi-link device)或多频段设备(multi-band device)。相比于仅支持单条链路传输的设备来说，多链路设备具有更高的传输效率和更高的吞吐量。
多链路设备可以包括一个或多个隶属的站点STA(affiliated STA)，隶属的STA是一个逻辑上的站点，可以工作在一条链路上。其中，隶属的站点可以为AP或STA。为描述方便，本申请将隶属的站点为AP的多链路设备可以称为多链路AP或多链路AP设备或AP多链路设备(AP multi-link device，AP MLD)，隶属的站点为non-AP STA的多链路设备可以称为多链路STA或多链路STA设备或STA多链路设备(STA multi-link device，STA MLD)。为描述方便，“多链路设备包括隶属STA”在本申请实施例中也简要描述为“多链路设备包括STA”。
需要说明的是，多链路设备可以包括多个逻辑站点，每个逻辑站点工作在一条链路上，但允许多个逻辑站点工作在同一条链路上。
多链路设备可以遵循802.11系列协议实现无线通信，例如，遵循EHT站点，或遵循基于802.11be或兼容支持802.11be的站点，实现与其他设备的通信，当然其他设备可以是多链路设备，也可以不是多链路设备。
示例性的，本申请实施例中的多链路设备可以是单个天线的设备，也可以是多天线的设备。例如，可以是两个以上天线的设备。本申请实施例对于多链路设备包括的天线的数目并不进行限定。在本申请的实施例中，多链路设备可以允许同一接入类型的业务在不同链路上传输，甚至允许相同的数据包在不同链路上传输；也可以不允许同一接入类型的业务在不同链路上传输，但允许不同接入类型的业务在不同的链路上传输。
示例性的，多链路设备为具有无线通信功能的装置，该装置可以为一个整机的设备，还可以是安装在整机设备中的芯片或处理系统等，安装这些芯片或处理系统的设备可以在 这些芯片或处理系统的控制下，实现本申请实施例的方法和功能。例如，本申请实施例中的STA MLD具有无线收发功能，可以为支持802.11系列协议，可以与AP MLD或其他STA MLD或单链路设备进行通信，例如，STA MLD是允许用户与AP通信进而与WLAN通信的任何用户通信设备。例如，STA MLD可以为平板电脑、桌面型、膝上型、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer，UMPC)、手持计算机、上网本、个人数字助理(personal digital assistant，PDA)、手机等可以联网的用户设备，或物联网中的物联网节点，或车联网中的车载通信装置等，STA MLD还可以为上述这些终端中的芯片和处理系统。
本申请实施例中的AP MLD为STA MLD提供服务的装置，可以支持802.11系列协议。例如，AP MLD可以为通信服务器、路由器、交换机、网桥等通信实体，或，所述AP MLD可以包括各种形式的宏基站，微基站，中继站等，当然AP MLD还可以为这些各种形式的设备中的芯片和处理系统，从而实现本申请实施例的方法和功能。并且，多链路设备可以支持高速率低时延的传输，随着无线局域网应用场景的不断演进，多链路设备还可以应用于更多场景中，比如为智慧城市中的传感器节点(比如，智能水表，智能电表，智能空气检测节点)，智慧家居中的智能设备(比如智能摄像头，投影仪，显示屏，电视机，音响，电冰箱，洗衣机等)，物联网中的节点，娱乐终端(比如AR，VR等可穿戴设备)，智能办公中智能设备(比如，打印机，投影仪等)，车联网中的车联网设备，日常生活场景中的一些基础设施(比如自动售货机，商超的自助导航台，自助收银设备，自助点餐机等)。本申请实施例中对于STA MLD和AP MLD的具体形式不做特殊限制，在此仅是示例性说明。其中，802.11协议可以为支持802.11be或兼容802.11be的协议。
多链路设备工作的频段可以包括：sub 1GHz，2.4GHz，5GHz，6GHz以及高频60GHz中的一个或多个，比如包括2.4GHz，5GHz，6GHz。
多链路设备中，各个链路可以包括链路标识，其中，链路标识表征的是工作在一条链路上的一个站点，也就是说，如果一条链路上有多于1个站点，则多于1个链路标识表征他们。下文提到的链路有时也表示工作在该条链路上的站点。
AP MLD与STA MLD在数据传输时，可以采用链路标识来标识一条链路或一条链路上的站点。在通信之前，AP MLD与STA MLD可以先协商或沟通链路标识与一条链路或一条链路上的站点的对应关系。因此在数据传输中，不传输大量的信令信息用来指示链路或链路上的站点，携带链路标识即可，降低了信令开销，提升了传输效率。
一个示例中，AP MLD在建立BSS时发送的管理帧，比如信标帧，会携带一个元素，该元素包括多个链路标识信息字段。链路标识信息字段可以指示一个链路标识与工作在该链路标识对应的链路上的站点的对应关系。链路标识信息字段不仅包括链路标识，还包括以下一个或多个信息：MAC地址，操作集，信道号。其中，MAC地址，操作集，信道号中的一个或多个可以指示一条链路。对于AP来说，AP的MAC地址也就是AP的BSSID。另一个示例中，在多链路设备关联过程中，AP MLD和STA多链路设备协商多个链路标识信息字段。其中，多链路设备关联是指AP MLD的一个AP与STA MLD的一个STA进行一次关联，该关联可帮助STA MLD的多个STA与AP MLD的多个AP分别关联，其中，一个STA关联到一个AP。
在后续的通信中，AP MLD或者STA多链路设备会通过链路标识来表征STA多链路 设备中的一个站点，链路标识还可表征该站点的MAC地址，工作的操作集，信道号中的一个或多个属性。其中，MAC地址可以换成关联后AP MLD的关联标识。可选的，如果是多个站点工作在一条链路上，那么链路标识(是一个数字的ID)表征的意义除了包括链路所在的操作集，信道号，还包括工作在该链路上的站点标识，比如站点的MAC地址或者站点的关联标识(association identifier，AID)。
虽然本申请实施例主要以部署IEEE 802.11的网络为例进行说明，但本领域技术人员容易理解，本申请涉及的各个方面可以扩展到采用各种标准或协议的其它网络，例如，BLUETOOTH(蓝牙)，高性能无线LAN(high performance radio LAN，HIPERLAN)(一种与IEEE 802.1 1标准类似的无线标准，主要在欧洲使用)以及广域网(WAN)、无线局域网(wireless local area network,WLAN)、个人区域网(personal area network,PAN)或其它现在已知或以后发展起来的网络。因此，无论使用的覆盖范围和无线接入协议如何，本申请提供的各种方面可以适用于任何合适的无线网络。
图4以无线局域网为例，介绍了本申请实施例应用的一种通信系统400。该通信系统400包括：站点401和站点402。其中，站点401可以与站点402之间采用多条链路进行通信，从而达到提升吞吐量的效果。站点401可以为多链路设备，站点402可以为单链路设备或多链路设备等。一种场景中，站点401为AP MLD，站点402为STA MLD或站点(比如单链路站点)。另一场景中，站点401为STA MLD，站点402为AP(比如单链路AP)或AP MLD。又一种场景中，站点401为AP MLD，站点402为AP MLD或AP；又一种场景中，站点401为STA MLD，站点402为STA MLD或STA(比如单链路站点)。当然，该无线局域网还可包括其他设备。图4示意的设备的数量及类型仅是示例性的。
图5、图6分别示出了通信系统500、通信系统600的结构示意图。其中，通信系统500、通信系统600以无线局域网中多链路设备与其他设备通过多条链路进行通信为示例。
图5示出了一种AP MLD和STA MLD通信的场景，AP MLD包括隶属的AP1和AP2，STA MLD包括隶属的STA1和STA2，且AP MLD和STA MLD采用链路1和链路2并行进行通信。
图6示出了AP MLD601与STA MLD602，STA MLD603以及STA604进行通信的场景，AP MLD601包括隶属的AP601-1至AP601-3；STA MLD602包括隶属的三个STA602-1、STA602-2和STA602-3；STA MLD603包括2个隶属的STA603-1，STA603-2；STA604-1，STA604为单链路设备。AP MLD601可以分别采用链路1、链路2和链路3与STA MLD602进行通信；采用链路2和链路3与STA MLD603进行通信；采用链路1与STA604通信。一个示例中，STA604工作在2.4GHz频段；STA MLD603中，STA603-1工作在5GHz频段，STA603-2工作在6GHz频段；STA MLD602中，STA602-1工作在2.4GHz频段，STA602-2工作在5GHz频段，STA602-3工作在6GHz频段。AP MLD601中工作在2.4GHz频段的AP601-1可以通过链路1与STA604和STA MLD602中的STA602-2之间传输上行或下行数据。AP MLD601中工作在5GHz频段的AP601-2可以通过链路2与STA MLD 603中工作在5GHz频段的STA603-1之间传输上行或下行数据，还可通过链路2与和STA MLD602中工作在5GHz频段的STA602-2之间传输上行或下行数据。AP MLD601中工作在6GHz频段的AP601-3可通过链路3与STA MLD602中工作在6GHz频段的STA602-3之间传输上行或下行数据，还可通过链路3与STA MLD中的STA603-2之间传 输上行或下行数据。
说明的是，图5仅示出了AP MLD支持2个频段，图6仅以AP MLD701支持三个频段(2.4GHz，5GHz，6GHz)，每个频段对应一条链路，AP MLD701可以工作在链路1、链路2或链路3中的一条或多条链路为例进行示意。在AP侧或者STA侧，这里的链路还可以理解为工作在该链路上的站点。实际应用中，AP MLD和STA MLD还可以支持更多或更少的频段，即AP MLD和STA MLD可以工作在更多条链路或更少条链路上，本申请实施例对此并不进行限定。
具体实现时，图4至图6所示，如：各个接入点设备、站点设备均可以采用图7所示的组成结构，或者包括图7所示的部件。图7为本申请实施例提供的一种通信装置700的组成示意图，该通信装置700可以为接入点设备或者接入点设备中的芯片或者片上系统；也可以为站点设备或者站点设备中的芯片或者片上系统。如图7所示，该通信装置700包括处理器701，收发器702以及通信线路703。
进一步的，该通信装置700还可以包括存储器704。其中，处理器701，存储器704以及收发器702之间可以通过通信线路703连接。
其中，处理器701是中央处理器(central processing unit，CPU)、通用处理器网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)或它们的任意组合。处理器701还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不予限制。
收发器702，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。收发器702可以是模块、电路、收发器或者任何能够实现通信的装置。
通信线路703，用于在通信装置700所包括的各部件之间传送信息。
存储器704，用于存储指令。其中，指令可以是计算机程序。
其中，存储器704可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器704可以独立于处理器701存在，也可以和处理器701集成在一起。存储器704可以用于存储指令或者程序代码或者一些数据等。存储器704可以位于通信装置700内，也可以位于通信装置700外，不予限制。处理器701，用于执行存储器704中存储的指令，以实现本申请下述实施例提供的通信方法。
在一种示例中，处理器701可以包括一个或多个CPU，例如图7中的CPU0和CPU1。
作为一种可选的实现方式，通信装置700包括多个处理器，例如，除图7中的处理器701之外，还可以包括处理器707。
作为一种可选的实现方式，通信装置700还包括输出设备705和输入设备706。示例性地，输入设备706是键盘、鼠标、麦克风或操作杆等设备，输出设备705是显示屏、扬声器(speaker)等设备。
需要指出的是，通信装置700可以是台式机、便携式电脑、网络服务器、移动手机、平板电脑、无线终端、嵌入式设备、芯片系统或有图7中类似结构的设备。此外，图7中示出的组成结构并不构成对该通信装置的限定，除图7所示部件之外，该通信装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
此外，本申请的各实施例之间涉及的动作、术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。
下面结合图4至图6任一通信系统，参照下述图8，对本申请实施例提供的通信方法进行描述，其中，第一AP可以为图4至图6所示通信系统中的任一汇报AP(所述汇报AP为发送管理帧，比如信标帧，探测响应帧等的AP)，第一STA可以为图4至图7所示通信系统中任一与第一AP关联的STA，且隶属于STA多链路设备(或者也可以描述为non-AP MLD)；其中，第一AP所在的第一AP多链路设备与第一STA所在的STA多链路设备可以通过多链路通信连接。下述实施例所述的第一AP、第一STA均可以具备图7所示部件。
图8为本申请实施例提供的一种通信方法的流程图，如图8所示，该方法可以包括：
步骤801、第一接入点AP生成管理帧。
其中，第一AP多链路设备可以包括至少一个AP，至少一个AP可以包括第一AP；管理帧可以包括能力信息字段，能力信息字段可以包括第一指示信息。
示例性的，管理帧可以为下述一种或多种：信标帧、关联响应帧、重关联响应帧、鉴权帧、探测响应帧。
其中，第一指示信息可以用于指示第一AP多链路设备中是否有其他AP已发生信道变更；或者第一指示信息可以用于指示第一AP多链路设备中是否有包括第一AP在内的AP已发生信道变更。
下面以第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更为例进行说明，可以理解的是，下述实施例也适用于第一指示信息用于指示第一AP多链路设备中是否有包括第一AP在内的AP已发生信道变更的情况。
例如，当第一AP多链路设备中有其他AP已发生信道变更，可以将第一指示信息置第一值，比如1，否则，将第一指示信息置第二值，比如0。需要说明的是，如果第一指示信息设置为第一值时，该值需要保持到下一个发送业务指示图(delivery traffic indication map，DTIM)信标帧，在该DTIM信标帧之后，第一指示信息重置为第二值。
可选的，能力信息字段还包括第一关键参数更新标志信令。
其中，第一关键参数更新标志信令可以用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化，关键参数更新值也可以描述为BSS参数变更计数值，或者描述为BSS参数变更计数字段的取值。
示例性的，当第一AP多链路设备中的一个AP对应的关键基本服务集合BSS参数事件中的任一事件发生时，第一AP调整该AP的关键参数更新值的取值。当第一AP多链路设备中的一个AP的关键参数更新值发生变化时，第一AP调整第一关键参数更新标志信令。
例如，对于任一AP的关键BSS参数事件，每发生一个事件，该AP的关键参数更新值加1。
又例如，当第一AP多链路设备中的一个AP的关键参数更新值的取值发生变化时，可以将第一关键参数更新标志信令置第一值，比如1，否则，将第一关键参数更新标志信令置第二值，比如0。需要说明的是，如果第一关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第一关键参数更新标志信令重置为第二值。
其中，如图3所示，关键参数更新值位于RNR元素中的MLD参数字段中的BSS参数变更计数字段。
其中，关键BSS参数事件可以包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素(modification of the enhanced distributed channel access parameters element)、修改直接序列扩频DSSS参数集合元素(modification of the direct sequence spread spectrum parameter set)、修改高吞吐量操作元素(modification of the high throughput operation element)、包括宽带宽信道更变元素(inclusion of a wide bandwidth channel switch element)、包括宽带宽信道更变封套元素(inclusion of a channel switch wrapper element)、包括操作模式通知元素(inclusion of an operating mode notification element)、修改极高吞吐量VHT操作元素(modification of the very high throughput operation element)、修改高效操作元素(modification of the high efficient operation element)、插入广播目标唤醒时间TWT元素(insertion of a broadcast target wakeup time element)、包括BSS颜色变更通知元素(inclusion of the BSS color change announcement element)、修改多用户MU EDCA参数集合元素(modification of the MU enhanced distributed channel access parameter set element)、修改空间复用参数集合元素(modification of the spatial reuse parameter set element)、修改极高吞吐量EHT操作元素(modification of the EHT operation element)。
进一步的，关键BSS参数事件可以包括上述事件中的任一事件。
可选的，关键BSS参数事件还包括修改免竞争参数集合元素(modification of the contention free parameter set element)。
示例性的，第一AP可以将第一AP多链路设备中除第一AP以外的所有AP的关键参数更新值携带在如图3所示的管理帧的RNR元素中的MLD参数字段中；第一AP还可以将第一AP的关键参数更新值携带在如图9所示的多链路元素中的公共信息字段中。
需要说明的是，关键BSS参数事件不包括下述事件中的任一事件：包括信道变更通知元素(inclusion of channel switch announcement element)、包括拓展信道变更通知元素(inclusion of extended channel switch announcement element)、包括静态元素(inclusion of quiet element)、包括静态信道元素(inclusion of quiet channel element)。
对于第一AP多链路设备，无论其他AP发送的管理帧是否包括信道变更相关的元素，都不会导致其他AP的关键参数更新值的取值发生变化，即无论其他AP发送的管理帧是否包括信道变更相关的元素，都不会导致第一关键参数更新标志信令的取值发生变化。
其中，其他AP发送的管理帧是否包括信道变更相关的元素也可以描述为是否有其他AP正在发生信道变更。即无论是否有其他AP正在发生信道变更，都不会导致其他AP的关键参数更新值的取值发生变化，即无论是否有其他AP正在发生信道变更，都不会导致 第一关键参数更新标志信令的取值发生变化。
与802.11ax标准以及802.11-2020协议相比，通过将包括信道变更通知元素、包括拓展信道变更通知元素、包括静态元素和包括静态信道元素的相关事件从关键BSS参数事件中去除，可以避免与第一AP多链路设备关联的STA多链路设备根据管理帧中的RNR元素和多链路元素，获取重复的AP的信道变更信息，从而降低STA多链路设备的功耗，节约空口传输机会。
一种可能的设计中，当第一AP多链路设备中的其他AP正在发生信道变更时(也就说其他AP在发送信标帧或者探测响应帧是携带信道变更相关的元素)，此时第一AP发送的管理帧的多链路元素中可以携带该其他AP的信道变更相关的元素，以使第一STA根据管理帧获取正在发生信道变更的AP的信道变更相关的元素，以使与STA隶属于同一个STA多链路设备中，与正在发生信道变更的AP关联的STA获取其关联的AP的信道变更相关的元素。
其中，信道变更相关的元素可以包括下述一种或多种：信道变更通知元素、拓展信道变更通知元素、最大信道变更时间元素。
其中，如图10中的(a)所示，信道变更通知元素可以包括元素号字段、长度字段、信道变更模式字段、新信道号字段和信道变更计数字段。如图10中的(b)所示，拓展信道变更通知元素可以包括元素号字段、长度字段、信道变更模式字段、新操作集字段、新信道号字段和信道变更计数字段。
其中，信道变更计数字段指示发送信道变更元素或者拓展信道变更元素的站点变更到新信道，或者新操作集和新信道还剩的TBTT的个数。例如，通过将信道变更计数字段为1，可以指示变更会在下一个TBTT之前立即发生，将信道变更计数字段为0，可以指示变更会随时在这个帧发送完之后发生。新信道号字段指示信道变更后的信道号，新操作集字段指示信道变更后的操作集。
需要说明的是，上述各个信道变更相关的元素的时间字段可以是以正在发生信道变更的AP的信标帧传输时间及信标帧间隔作为参考。
又一种可能的设计中，在信道目标变更时间点前，第一AP发送的管理帧中的RNR元素包括已发生信道变更的AP(被汇报的邻居AP)的信道信息，该信道信息中包括该AP在该时间点前工作的操作集和信道号(即信道变更前的操作集和信道号)；在信道目标变更时间点后，第一AP发送的管理帧中的RNR元素包括已发生信道变更的AP(被汇报的邻居AP)的信道信息，该信道信息中包括该AP在该时间点后工作的操作集和信道号(即信道变更后的操作集和信道号)。
需要说明的是，上述信道信息中的操作集和信道号也可以替换成信道号。
步骤802、第一AP向第一STA发送管理帧。相应的，第一STA接收管理帧。
步骤803、当第一指示信息用于指示第一AP多链路设备中有其他AP已发生信道变更，第一STA接收发生信道变更后的AP的信道变更信息，以使与第一STA隶属于同一个STA多链路设备中，与发生信道变更后的AP关联的STA获取该信道变更信息。
其中，第一STA可以为STA多链路设备中与第一AP关联的STA。
示例性的，以STA多链路设备中除第一STA以外的STA处于休眠状态，采用第一STA侦听工作的链路为例，第一STA可以根据第一AP发送的管理帧中的第一指示信息， 确定第一AP多链路设备中是否有其他AP已发生信道变更。
一种可能的设计中，第一STA接收到第一AP发送的管理帧后，如果第一AP多链路设备中有其他AP正在发生信道变更，第一STA可以解析管理帧中的多链路元素，以获取正在发生信道变更的AP的信道变更相关的元素。如果第一AP多链路设备中没有AP正在发生信道变更(比如已发生信道变更)，第一STA接收的管理帧中的多链路元素没有携带信道变更相关的元素。
又一种可能的设计中，第一STA接收到第一AP发送的管理帧后，如果第一指示信息指示第一AP多链路设备中有其他AP已发生信道变更，第一STA可以解析管理帧中的RNR元素，以获取已发生信道变更的AP的信道信息。如果第一指示信息指示第一AP多链路设备中没有其他AP已发生信道变更，由于RNR元素用于邻居AP发现，第一STA可以解析管理帧中的RNR元素，也可以不解析管理帧中的RNR元素，从而降低功耗。可选的，STA多链路设备与第一AP多链路设备已经关联。
其中，当第一指示信息指示第一AP多链路设备中有AP已发生信道变更(还可以理解为RNR元素中关于该第一AP多链路设备的其他任一AP的信道信息已变更或第一AP的信道信道信息已变更)，或者其他AP已发生信道变更(还可以理解为RNR元素中关于该第一AP多链路设备的其他任一AP的信道信息已变更)，第一STA可以解析管理帧中的RNR元素，以获取已发生信道变更的AP的信道信息，同时，与第一STA属于同一个STA多链路设备的其他STA也获知该信道信息，比如与发生信道变更后的AP关联的STA，便于后续基于信道变更信息与其关联的AP进行通信。
示例性的，如图11所示，以STA多链路设备包括STA1和STA2，且与第一AP多链路设备建立多链路连接，其中，STA1和STA2分别关联到第一AP多链路设备的AP 1和AP2为例。假设STA1处于休眠状态，由STA 2来观察其工作的链路2，当AP1正在进行信道切换时，由于AP2在链路2上发送的信标帧间隔较大，导致链路2上的信标帧并没携带信道变更通知元素或者拓展信道变更通知元素元素，因此在链路2上第一个信标帧发送的时候，链路1上AP1并没有发送信道变更，而在链路2上第二个信标帧发送的时候，此时链路1上的AP1已经完成信道变更。此时STA多链路设备中处于醒来状态的STA2无法获知位于链路1的AP1变更信道的信息，导致STA多链路设备无法跟AP1进行通信。而本申请实施例中通过在管理帧中添加第一指示信息，可以使得STA2根据第一指示信息确定第一AP多链路设备中有其他AP已发生信道变更，进而解析信标帧中的RNR元素，获取AP1的信道信息，进而使得与AP1关联的STA1获取AP1的信道信息，从而保证STA1与AP1可以正常通信。
基于上述图8所示的方法，第一AP发送管理帧时，通过携带第一指示信息，可以指示第一AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP多链路设备的第一STA根据第一指示信息确定第一AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
可选的，如果第一AP位于多BSSID集合中，该第一AP为传输AP，发送的管理帧还包括非传输基本服务集标识BSSID字段，非传输BSSID字段包括第二指示信息；第二指 示信息可以用于指示第二AP多链路设备中是否有其他AP已发生信道变更，第二AP多链路设备中的至少一个AP与第一AP属于同一个多BSSID集合。其中非传输BSSID字段位于Multiple BSSID元素中的非传输BSSID概括子元素中的非传输BSSID能力元素中，非传输BSSID字段也可以称为非传输BSSID能力字段，或者其他名字。
其中，第二AP多链路设备中的其他AP可以是第二多链路设备中除非传输AP之外的其他AP。
示例性的，如图12所示，多BSSID集合1可以包括BSSID-1x和BSSID-1y；多BSSID集合2可以包括BSSID-2y、BSSID-2x和BSSID-2z；多BSSID集合4可以包括BSSID-4x、BSSID-4y和BSSID-4z。针对链路1，以AP-1x(BSSID-1x)发送信标帧为例，第一AP多链路设备可以为AP MLD 1，第二AP多链路设备可以为AP MLD 3。针对链路2，以AP-2x(BSSID-2x)发送信标帧为例，第一AP多链路设备可以为AP MLD 2，第二AP多链路设备可以为AP MLD 1和AP MLD 3。针对链路4，以AP-4x(BSSID-4x)发送信标帧为例，第一AP多链路设备可以为AP MLD 2，第二AP多链路设备可以为AP MLD 3和AP MLD 4。
示例性的，当第二AP多链路设备中有其他AP已发生信道变更，可以将第二指示信息置第一值，比如1，否则，将第二指示信息置第二值，比如0。需要说明的是，如果第二指示信息设置为第一值时，该值需要保持到下一个DTIM信标帧(非传输BSSID的DTIM信标帧)，在该DTIM信标帧之后，第一指示信息重置为第二值。
可选的，非传输BSSID字段还包括第二关键参数更新标志信令。
其中，第二关键参数更新标志信令可以用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化。
示例性的，当第二AP多链路设备中的一个AP对应的关键BSS参数事件中的任一事件发生时，第一AP调整该AP的关键参数更新值的取值。当第二AP多链路设备中的一个AP的关键参数更新值发生变化时，第一AP调整第二关键参数更新标志信令。
例如，对于任一AP的关键BSS参数事件，每发生一个事件，该AP的关键参数更新值加1。
又例如，当第二AP多链路设备中的任一AP的关键参数更新值的取值发生变化时，可以将第二关键参数更新标志信令置第一值，比如1，否则，将第二关键参数更新标志信令置第二值，比如0。需要说明的是，如果第二关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧(非传输BSSID的DTIM信标帧)，在该DTIM信标帧之后，第二关键参数更新标志信令重置为第二值。
其中，如图3所示，关键参数更新值位于RNR元素中的MLD参数字段中的BSS参数变更计数字段。
示例性的，第一AP可以将第二AP多链路设备中除与第一AP位于同一多BSSID集合中的非传输AP以外的其他AP的关键参数更新值携带在如图3所示的管理帧的RNR元素中的MLD参数字段中，第一AP还可以将第二AP多链路设备中与第一AP位于同一多BSSID集合中的非传输AP的关键参数更新值携带在如图9所示的多链路元素中的公共信息字段中。
对于第二AP多链路设备，无论其他AP发送的管理帧是否包括信道变更相关的元素， 都不会导致其他AP的关键参数更新值的取值发生变化，即无论其他AP发送的管理帧是否包括信道变更相关的元素，都不会导致第一关键参数更新标志信令的取值发生变化。
其中，其他AP发送的管理帧是否包括信道变更相关的元素也可以描述为是否有其他AP正在发生信道变更。即无论是否有其他AP正在发生信道变更，都不会导致其他AP的关键参数更新值的取值发生变化，即无论是否有其他AP正在发生信道变更，都不会导致第一关键参数更新标志信令的取值发生变化。
进一步的，在信道目标变更时间点前，第一AP发送的管理帧中的RNR元素还可以包括第二AP多链路设备中已发生信道变更的AP信道信息，该信道信息中包括该AP在该时间点前工作的操作集和信道号(即信道变更前的操作集和信道号)；在信道目标变更时间点后，第一AP发送的管理帧中的RNR元素包括第二AP多链路设备中已发生信道变更的AP(被汇报的邻居AP)的信道信息，该信道信息中包括该AP在该时间点后工作的操作集和信道号(即信道变更后的操作集和信道号)。
第一AP发送管理帧时，通过携带第二指示信息，可以指示第二AP多链路设备中是否有其他AP已发生信道变更，使得与第一AP关联的隶属于non-AP MLD的第一STA根据第二指示信息确定第二AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，从而使得与已发生信道变更的AP关联的同隶属于同一non-AP MLD中的STA(即使该STA处于休眠状态)获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
与上述图8至图12所示的方法中采用第一指示信息指示第一AP多链路设备中是否有其他AP已发生信道变更，采用第一关键参数更新标志信令指示第一AP多链路设备中是否有AP的关键参数更新值发生变化相比，本申请实施例还可以对第一关键参数更新标志信令进行重新定义，即将第一关键参数更新标志信令重新定义为用于指示第一AP多链路设备中是否有AP的关键参数更新值发生变化或者第一AP多链路设备中是否有其他AP已发生信道变更。
示例性的，当第一AP多链路设备中有AP的关键参数更新值发生变化，可以将第一关键参数更新标志信令置第一值，比如1；或者，当第一AP多链路设备中有其他AP已发生信道变更，可以将第一关键参数更新标志信令置第一值，比如1；或者，当第一AP多链路设备中有AP的关键参数更新值发生变化且第一AP多链路设备中有其他AP已发生信道变更，可以将第一关键参数更新标志信令置第一值，比如1；否则，将第一关键参数更新标志信令置第二值，比如0。需要说明的是，如果第一关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第一关键参数更新标志信令重置为第二值。
或者，也可以将第一关键参数更新标志信令重新定义为用于指示RNR元素中关于第一AP多链路设备的其他AP的信道信息，或者该其他AP的关键参数更新值已变更，或者第一AP的关键参数更新值已变更。
示例性的，当第一关键参数更新标志信令用于指示RNR元素中关于第一AP多链路设备的其他AP的信道信息，可以将第一关键参数更新标志信令置第一值，比如1；或者，当第一AP多链路设备的其他AP的关键参数更新值已变更，可以将第一关键参数更新标志信令置第一值，比如1；或者，当第一AP的关键参数更新值已变更，可以将第一关键参数 更新标志信令置第一值，比如1；否则，将第一关键参数更新标志信令置第二值，比如0。需要说明的是，如果第一关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第一关键参数更新标志信令重置为第二值。
或者，也可以将第一关键参数更新标志信令重新定义为用于指示RNR元素中关于第一AP多链路设备的其他AP的信息(比如包括信道信息，关键参数更新值，链路标识等的一个或多个)，或者第一AP的信息已变更(比如包括关键参数更新值，链路标识等一个或多个)。也可以描述为将第一关键参数更新标志信令重新定义为用于指示第一AP多链路设备的其他AP的信息发生变更(或者描述为第一AP多链路设备的其他AP的信息重新配置)，或者该其他AP的关键参数更新值已变更，或者第一AP的关键参数更新值已变更。
需要说明的是，第一AP多链路设备的其他AP的信息(或者描述为重配置信息)可以携带在管理帧中，所述管理帧携带RNR元素。
其中，对于链路标识，第一AP多链路设备中的某个AP可能会出现重新配置，比如更换其链路标识。当然，第一关键参数更新标志信令可以为另外一个独立的信令，承载于信标帧，探测响应帧，或者其他管理帧中，比如能力信息字段中。此时该独立的信令不再包括第一AP多链路设备的其他AP的信息中的关联参数更新值的变更，以及不再包括第一AP的信息的变更。也就说不包括已有的第一关键参数更新标志信令的含义。
针对于第一AP多链路设备的AP的信息变更(或者称为重新配置)，可以理解为以下的一个或多个：
1.第一多链路设备中的一个或多个AP被移除
比如说该AP的信息不出现在RNR元素中，包括该AP的信息中的链路标识被去除，具体如图2和图3所示的信息，属于AP的信息发生变更的一种。
2.第一多链路设备中增加一个或多个AP
比如说该AP的信息被新增加到RNR元素中，包括新增该AP的信息中的链路标识，具体如图2和图3所示的信息，属于AP的信息发生变更的一种。
3.第一多链路设备中的一个或多个AP处于去使能(disable)/使能(enable)的状态变化，属于AP的信息发生变更的一种
比如该AP的信息包括的1比特信息信令指示该AP处于去使能状态还是处于使能状态。
1)该1比特信息可以位于RNR元素中MLD参数字段中，进一步来讲位于MLD参数字段的链路标识字段中。链路标识字段中包括4比特的链路标识和1比特信息信令字段，所述1比特信息信令字段用来指示该被汇报AP处于使能状态还是去使能状态；置第一值，比如0，指示被汇报AP处于使能状态；置第一值，比如1，指示被汇报AP处于去使能状态；反之亦然。由于MLD参数字段是在802.11be这一代标准新增的，传统站点无法识别该新增的MLD参数字段，因此无法获知该意义。
或者2)该1比特信息可以位于RNR元素中TBTT信息头字段中的TBTT信息字段类型。比如说，TBTT信息字段类型字段置“0”值，此时该AP处于使能状态；TBTT信息字段类型字段置另一个值，比如“1”，此时该AP处于去使能状态；值 得的注意，目前RNR元素中，2比特的TBTT信息字段类型字段只有取值为0被使用，其他3个值处于未使用或保留。此时使用TBTT信息字段类型字段置另一个值指示被汇报AP处于去使能状态，仍保留“0”值指示该被汇报AP处于使能状态，可以避免传统站点识别该被汇报AP的信息，从而该传统站点去扫描该被汇报AP，或者与该汇报AP去关联。解决传统站点的问题。其中传统站点包括未关联站点，当然也包括已关联站点。
或者3)该1比特信息可以位于RNR元素中TBTT信息头字段中的保留字段中，置第一值，比如0，指示被汇报AP处于使能状态；置第一值，比如1，指示被汇报AP处于去使能状态；反之亦然。该方法也可以避免传统站点识别该被汇报AP的信息，从而避免该传统站点去扫描该被汇报AP，或者与该汇报AP去关联。解决传统站点的问题。其中传统站点包括未关联站点，当然也包括已关联站点。
当然1)，2)和3)方法都适用于802.11be这一代新站点，或者下一代的站点。
4.第一多链路设备中的一个或多个AP的工作链路(比如对应的信道号，操作集)更换。
比如该AP的信道信息进行了变更，包括信道号和或操作集。可选的，还包括其链路标识进行了变更。属于AP的信息发生变更的一种。
示例性的，当第一关键参数更新标志信令用于指示RNR元素中关于第一AP多链路设备的其他AP的信息(比如包括信道信息，关键参数更新值，链路标识等)时，可以将第一关键参数更新标志信令置第一值，比如1；或者，当第一AP的信息已变更(比如包括关键参数更新值，链路标识等)，可以将第一关键参数更新标志信令置第一值，比如1；否则，将第一关键参数更新标志信令置第二值，比如0。需要说明的是，如果第一关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第一关键参数更新标志信令重置为第二值。
基于上述对第一关键参数更新标志信令的重新定义，当第一AP多链路设备中有AP的关键参数更新值发生变化或者第一AP多链路设备中有其他AP已发生信道变更，第一STA可以进一步对第一关键参数更新标志信令所在的管理帧中的RNR元素进行解析，进一步确定第一AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道变更信息。第一STA也可以进一步对管理帧进行解析，确定是否有AP的关键参数更新值发生变化。第一STA也可以在接收到第一AP发送的包括第一关键参数更新标志信令的管理帧后，对该管理帧进行解析，基于管理帧中的第一关联参数更新标志信令，STA多链路设备可以获取其他AP的发生变更的信息，或者其他AP的已变更的关键参数更新值，或者第一AP的已变更的关键参数更新值。
进一步的，与上述对第一关键参数更新标志信令进行重新定义类似的，也可以对上述第二关键参数更新标志信令进行重新定义，即第二关键参数更新标志信令用于指示第二AP多链路设备中是否有AP的关键参数更新值发生变化或者第二AP多链路设备中是否有其他AP已发生信道变更。
示例性的，当第二AP多链路设备中有AP的关键参数更新值发生变化，可以将第二关键参数更新标志信令置第一值，比如1；或者，当第二AP多链路设备中有其他AP已发 生信道变更，可以将第二关键参数更新标志信令置第一值，比如1；或者，当第二AP多链路设备中有AP的关键参数更新值发生变化且第二AP多链路设备中有其他AP已发生信道变更，可以将第二关键参数更新标志信令置第一值，比如1；否则，将第二关键参数更新标志信令置第二值，比如0。需要说明的是，如果第二关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第二关键参数更新标志信令重置为第二值。
或者，也可以将第二关键参数更新标志信令重新定义为用于指示RNR元素中关于第二AP多链路设备的除传输AP以外的其他AP的信道信息，或者该其他AP的关键参数更新值已变更，或者非传输AP的关键参数更新值已变更。
示例性的，当第二关键参数更新标志信令用于指示RNR元素中关于第二AP多链路设备的除传输AP以外的其他AP的信道信息，可以将第二关键参数更新标志信令置第一值，比如1；或者，当第二AP多链路设备的其他AP的关键参数更新值已变更，可以将第二关键参数更新标志信令置第一值，比如1；或者，当第二AP多链路设备中非传输AP的关键参数更新值已变更，可以将第二关键参数更新标志信令置第一值，比如1；否则，将第二关键参数更新标志信令置第二值，比如0。需要说明的是，如果第二关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第二关键参数更新标志信令重置为第二值。
或者，也可以将第二关键参数更新标志信令重新定义为用于指示RNR元素中关于第二AP多链路设备的除传输AP以外的其他AP的信息(比如包括信道信息，关键参数更新值，链路标识等的一个或多个)，或者非传输AP的信息(比如包括关键参数更新值，链路标识等的一个或多个)已变更。也可以描述为将第二关键参数更新标志信令重新定义为用于指示第二AP多链路设备的除传输AP以外的其他AP的信息发生变更(或者描述为第二AP多链路设备的除传输AP以外的其他AP的信息重新配置)，或者该其他AP的关键参数更新值已变更，或者非传输AP的关键参数更新值已变更。需要说明的是，第二AP多链路设备的除传输AP以外的其他AP的信息(或者描述为重配置信息)可以携带在管理帧中，所述管理帧携带RNR元素。
当然，第二关键参数更新标志信令可以为另外一个独立的信令，承载于信标帧，探测响应帧，或者其他管理帧中，比如位于非传输BSSID能力信息字段(多BSSID元素中的非传输BSSID能力元素中的非传输BSSID能力字段中)。此时该独立的信令不再包括第二AP多链路设备的其他AP的信息中的关联参数更新值的变化，以及不再包括第二AP的信息的变更。也就说不包括已有的第二关键参数更新标志信令的含义。
针对于第二AP多链路设备的AP的信息变更(或者说重新配置)，可以理解为以下的一个或多个：
1.第二多链路设备中的一个或多个AP被移除
比如说该AP的信息不出现在RNR元素中，包括该AP的信息中的链路标识被去除，具体如图2和图3所示的信息，属于AP的信息发生变更的一种。
2.第二多链路设备中增加一个或多个AP
比如说该AP的信息被新增加到RNR元素中，包括新增该AP的信息中的链路标识，具体如图2和图3所示的信息，属于AP的信息发生变更的一种。
3.第二多链路设备中的一个或多个AP处于去使能(disable)/使能(enable)的状态变化，属于AP的信息发生变更的一种
比如该AP的信息包括的1比特信息信令指示该AP处于去使能状态还是处于使能状态。
1)该1比特信息可以位于RNR元素中MLD参数字段中，进一步来讲位于MLD参数字段的链路标识字段中。链路标识字段中包括4比特的链路标识和1比特信息信令字段，所述1比特信息信令字段用来指示该被汇报AP处于使能状态还是去使能状态；置第一值，比如0，指示被汇报AP处于使能状态；置第一值，比如1，指示被汇报AP处于去使能状态；反之亦然。由于MLD参数字段是在802.11be这一代标准新增的，传统站点无法识别该新增的MLD参数字段，因此无法获知该意义。
或者2)该1比特信息可以位于RNR元素中TBTT信息头字段中的TBTT信息字段类型。比如说，TBTT信息字段类型字段置“0”值，此时该AP处于使能状态；TBTT信息字段类型字段置另一个值，比如“1”，此时该AP处于去使能状态；值得的注意，目前RNR元素中，2比特的TBTT信息字段类型字段只有取值为0被使用，其他3个值处于未使用或保留。此时使用TBTT信息字段类型字段置另一个值指示被汇报AP处于去使能状态，仍保留“0”值指示该被汇报AP处于使能状态，可以避免传统站点识别该被汇报AP的信息，从而该传统站点去扫描该被汇报AP，或者与该汇报AP去关联。解决传统站点的问题。其中传统站点包括未关联站点，当然也包括已关联站点。
或者3)该1比特信息可以位于RNR元素中TBTT信息头字段中的保留字段中，置第一值，比如0，指示被汇报AP处于使能状态；置第一值，比如1，指示被汇报AP处于去使能状态；反之亦然。该方法也可以避免传统站点识别该被汇报AP的信息，从而避免该传统站点去扫描该被汇报AP，或者与该汇报AP去关联。解决传统站点的问题。其中传统站点包括未关联站点，当然也包括已关联站点。
当然1)，2)和3)方法都适用于EHT这一代新站点，或者下一代的站点。
4.第二多链路设备中的一个或多个AP的工作链路(比如对应的信道号，操作集)更换。
比如该AP的信道信息进行了变更，包括信道号和或操作集。可选的，还包括其链路标识进行了变更。属于该AP的信息发生变更的一种。
示例性的，当第二关键参数更新标志信令用于指示RNR元素中关于第二AP多链路设备的除传输AP以外的其他AP的信息(比如包括信道信息，关键参数更新值，链路标识等)时，可以将第二关键参数更新标志信令置第一值，比如1；或者，当非传输AP的信息已变更(比如包括关键参数更新值，链路标识等)，可以将第二关键参数更新标志信令置第一值，比如1；否则，将第二关键参数更新标志信令置第二值，比如0。需要说明的是，如果第二关键参数更新标志信令设置为第一值时，该值需要保持到下一个DTIM信标帧，在该DTIM信标帧之后，第二关键参数更新标志信令重置为第二值。
基于上述对第二关键参数更新标志信令的重新定义，当第二AP多链路设备中有AP的关键参数更新值发生变化或者第二AP多链路设备中有其他AP已发生信道变更，第一 STA可以进一步对第二关键参数更新标志信令所在的管理帧中的RNR元素进行解析，进一步确定第二AP多链路设备中是否有其他AP已发生信道变更，如果有，则获取已发生信道变更的AP的信道变更信息，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道变更信息。第一STA也可以进一步对管理帧进行解析，确定是否有AP的关键参数更新值发生变化。第一STA也可以在接收到第一AP发送的包括第二关键参数更新标志信令的管理帧后，对该管理帧进行解析，基于管理帧中的第二关联参数更新标志信令，STA多链路设备可以获取其他AP的发生变更的信息，或者其他AP的已变更的关键参数更新值，或者非传输AP的已变更的关键参数更新值。
与上述根据第一指示信息确定是否发生有AP已发生信道变更相对应的，如图13所示，本申请实施例还提供了一种通信方法，如图13所示，该方法可以包括：
步骤1301、第一AP生成管理帧。
其中，管理帧可以包括多链路(multi-link，ML)元素，当第一AP多链路设备中有其他AP发生信道变更后，ML元素可以包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送DTIM信标帧。或者，当第一AP多链路设备中有包括第一AP在内的AP已发生信道变更后，ML元素可以包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送DTIM信标帧。
下面以第一AP多链路设备中有其他AP已发生信道变更后，ML元素可以包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送DTIM信标帧为例进行说明，可以理解的是，下述实施例也适用于第一AP多链路设备中有包括第一AP在内的AP已发生信道变更后，ML元素可以包括已发生信道变更的AP的信道变更信息，且持续到第一AP发送的下一个发送DTIM信标帧的情况。
示例性的，如图14所示，ML元素可以包括元素ID(identier)字段、长度字段、元素ID拓展字段、多链路控制字段、公共信息字段以及链路信息字段。
其中，链路信息字段可以包括若干per-STA概括信息字段，每个per-STA概括信息字段可以包括子元素ID字段、长度字段、STA控制字段、STA信息字段、以及STA概括字段。
需要说明的是，图14中的STA概括字段中的拓展信道变更元素和STA信息字段中的操作集字段和信道号字段分别对应下述两种可能的设计，并不会同时出现，具体如下：
一种可能的设计中，信道变更信息是信道变更相关的元素，第一AP将信道变更相关的元素携带在ML元素中的STA概括字段内。
其中，信道变更的相关的元素可以包括信道变更元素，或者拓展信道变更元素，用于指示被汇报AP已发生信道变更，直到下一个DTIM信标帧。
其中，信道变更相关的元素还包括信道变更计数字段，指示发送信道变更元素或者拓展信道变更元素的站点变更到新信道，或者新操作集和新信道还剩的TBTT的个数，当信道变更计数字段的取值为第一取值时，比如1，信道变更计数字段可以用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当信道变更计数字段的取值为第二取值时，比如0，信道变更计数字段可以用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
示例性的，当第一AP多链路设备中有其他AP发生信道变更，且在该AP信道变更完 成后，第一AP发送管理帧时，仍在管理帧的ML元素的STA概括字段中携带发生信道变更后的AP的信道变更相关的元素，直到下一个DTIM信标帧，以使第一STA根据管理帧获取已发生信道变更的AP的信道变更相关的元素，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道变更相关的元素。此时，信道变更相关的元素中，信道变更计数字段的取值可以为第二取值，比如0，即用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
又一种可能的设计中，信道变更信息是信道信息，第一AP将信道信息携带在ML元素中的STA信息字段内。
其中，信道信息可以包括操作集和信道号；或者，信道信息可以包括信道号。
示例性的，当第一AP多链路设备中有其他AP已发生信道变更，且在该AP信道变更完成后，第一AP发送管理帧时，仍在管理帧的ML元素的STA信息字段中携带发生信道变更后的AP的信道信息，直到下一个DTIM信标帧，以使第一STA根据管理帧获取已发生信道变更的AP的信道信息，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道信息。
步骤1302、第一AP向第一站点STA发送管理帧。相应的，第一STA接收管理帧。
步骤1303、第一STA根据ML元素获取信道变更信息，以使与第一STA隶属于同一个STA多链路设备中，与发生信道变更后的AP关联的STA获取信道变更信息。
一种可能的设计中，第一STA解析管理帧(比如DTIM信标帧)的ML元素中的STA概括字段，以获取第一AP多链路设备中，已发生信道变更的AP的信道变更相关的元素以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道变更相关的元素。此时，信道变更相关的元素中，信道变更计数字段的取值可以为第二取值，即用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
又一种可能的设计中，第一STA解析管理帧(比如DTIM信标帧)的ML元素中的STA信息字段，以获取第一AP多链路设备中，已发生信道变更的AP的信道信息，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道信息。
示例性的，如图15所示，以STA多链路设备包括STA1和STA2，且与第一AP多链路设备建立多链路连接，其中，STA1和STA2分别关联到第一AP多链路设备的AP1和AP2为例。假设STA1处于休眠状态，由STA 2来观察其工作的链路2，STA 2只在链路2上的DTIM信标帧的时间点醒来。当AP1进行信道切换后，由于AP2在链路2上发送的信标帧间隔较大，AP2可以在链路2上的第二个信标帧和第三个信标帧(分别为图15中第一个TIM信标帧和第二个DTIM信标帧)中的ML元素携带信道变更信息，STA2通过对在链路2上接收的DTIM信标帧中的ML元素进行解析，可以获知位于链路1的AP1已经完成信道变更，并获知信道变更信息，进而使得与AP1关联的STA1获取AP1的信道变更信息，从而保证STA1与AP1可以正常通信。
可选的，如果第一AP位于多BSSID集合中，该第一AP为传输AP，发送的管理帧中的ML元素还可以包括第二AP多链路设备中发生信道变更后的其他AP的信道变更信息，且持续到所述第一STA接收到第一AP发送的下一个DTIM信标帧。
其中，第二AP多链路设备中的其他AP可以是第二多链路设备中除非传输AP之外的其他AP。
一种可能的设计中，当第二AP多链路设备中有其他AP发生信道变更，且在该AP信道变更完成后，第一AP发送管理帧时，仍在管理帧的ML元素的STA概括字段中携带第二AP多链路设备中发生信道变更后的AP的信道变更相关的元素，直到下一个DTIM信标帧，以使第一STA根据管理帧获取已发生信道变更的AP的信道变更相关的元素，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道变更相关的元素。此时，信道变更相关的元素中，信道变更计数字段的取值可以为第二取值，即用于指示信道变更会随时在管理帧发送完之后发生或者信道变更已经发生。
又一种可能的设计中，当第二AP多链路设备中有其他AP已发生信道变更，且在该AP信道变更完成后，第一AP发送管理帧时，仍在管理帧的ML元素的STA信息字段中携带第二AP多链路设备中发生信道变更后的AP的信道信息，直到下一个DTIM信标帧，以使第一STA根据管理帧获取已发生信道变更的AP的信道信息，以使与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获取该信道信息。
基于上述图13所示的方法，第一AP发送管理帧时，通过在管理帧的ML元素中携带第一AP多链路设备或第二AP多链路设备中已发生信道变更的AP的信道变更信息，可以使得与第一AP关联的第一STA根据ML元素确定已发生信道变更的AP的信道变更信息，进而使得与第一STA隶属于同一个STA多链路设备中，与已发生信道变更的AP关联的STA获知其关联的AP已发生信道变更，以及发生信道变更后的信道变更信息。
上述主要从设备之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对各个设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图16示出了一种第一AP，第一AP160可以包括处理模块1601和收发模块1602。示例性地，第一AP160可以是第一AP，也可以是应用于第一AP中的芯片或者其他具有上述第一AP功能的组合器件、部件等。当第一AP160是第一AP时，处理模块1601可以是处理器(或者，处理电路)，例如基带处理器，基带处理器中可以包括一个或多个CPU；收发模块1602可以是收发器，收发器可以包括天线和射频电路等。当第一AP160是具有上述第一AP功能的部件时，处理模块1601可以是处理器(或者，处理电路)，例如基带处理器；收发模块1602可以是射频单元。当第一AP160是芯片系统时，处理模块1601可以是芯片系统的处理器(或者，处理 电路)，可以包括一个或多个中央处理单元；收发模块1602可以是芯片(例如基带芯片)的输入输出接口。应理解，本申请实施例中的处理模块1601可以由处理器或处理器相关电路组件(或者，称为处理电路)实现；收发模块1602可以由收发器或收发器相关电路组件实现。
例如，处理模块1601可以用于执行图8-图15所示的实施例中由第一AP所执行的除了收发操作之外的全部操作，和/或用于支持本文所描述的技术的其它过程；收发模块1602可以用于执行图8-图15所示的实施例中由第一AP所执行的全部收发操作，和/或用于支持本文所描述的技术的其它过程。
作为又一种可实现方式，图16中的处理模块1601可以由处理器代替，该处理器可以集成处理模块1601的功能；收发模块1602可以由收发器代替，该收发器可以集成收发模块1602的功能。进一步的，图16所示第一AP160还可以包括存储器。当处理模块1601由处理器代替，收发模块1602由收发器代替时，本申请实施例所涉及的第一AP160可以为图7所示通信装置。
在采用对应各个功能划分各个功能模块的情况下，图17示出了一种第一STA，第一STA170可以包括收发模块1701和处理模块1702。示例性地，第一STA170可以是第一STA，也可以是应用于第一STA中的芯片或者其他具有上述第一STA功能的组合器件、部件等。当第一STA170是第一STA时，收发模块1701可以是收发器，收发器可以包括天线和射频电路等；处理模块1702可以是处理器(或者，处理电路)，例如基带处理器，基带处理器中可以包括一个或多个CPU。当第一STA170是具有上述第一STA功能的部件时，收发模块1701可以是射频单元；处理模块1702可以是处理器(或者，处理电路)，例如基带处理器。当第一STA170是芯片系统时，收发模块1701可以是芯片(例如基带芯片)的输入输出接口；处理模块1702可以是芯片系统的处理器(或者，处理电路)，可以包括一个或多个中央处理单元。应理解，本申请实施例中的收发模块1701可以由收发器或收发器相关电路组件实现；处理模块1702可以由处理器或处理器相关电路组件(或者，称为处理电路)实现。
例如，收发模块1701可以用于执行图8-图15所示的实施例中由第一STA所执行的全部收发操作，和/或用于支持本文所描述的技术的其它过程；处理模块1702可以用于执行图8-图15所示的实施例中由第一STA所执行的除了收发操作之外的全部操作，和/或用于支持本文所描述的技术的其它过程。
作为又一种可实现方式，图17中的收发模块1701可以由收发器代替，该收发器可以集成收发模块1701的功能；处理模块1702可以由处理器代替，该处理器可以集成处理模块1702的功能。进一步的，图17所示第一STA170还可以包括存储器。当收发模块1701由收发器代替，处理模块1702由处理器代替时，本申请实施例所涉及的第一STA170可以为图7所示通信装置。
本申请实施例还提供了一种计算机可读存储介质。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机可读存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。计算机可读存储介质可以是前述任一实施例的终端(包括数据发送端和/或数据接收端)的内部存储单元，例如终端的硬盘或内存。上述计算机可读存储介质也可以是上述终端的外部存储设备，例如上述终端上 配备的插接式硬盘，智能存储卡(smart media card,SMC)，安全数字(secure digital,SD)卡，闪存卡(flash card)等。进一步地，上述计算机可读存储介质还可以既包括上述终端的内部存储单元也包括外部存储设备。上述计算机可读存储介质用于存储上述计算机程序以及上述终端所需的其他程序和数据。上述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
需要说明的是，本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
需要说明的是，本申请的说明书、权利要求书及附图中的相比802.11-2016协议和802.11ax Draft 8.0协议新提出的字段的名字，也可以为其他名字，不作限定。
应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现 出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (30)

  1. 一种通信方法，其特征在于，包括：
    第一接入点AP生成管理帧；其中，所述管理帧包括能力信息字段，所述能力信息字段包括第一指示信息；所述第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；所述第一AP多链路设备包括所述第一AP；
    所述第一AP向第一站点STA发送所述管理帧。
  2. 根据权利要求1所述的方法，其特征在于，
    所述能力信息字段还包括第一关键参数更新标志信令；其中，所述第一关键参数更新标志信令用于指示所述第一AP多链路设备中是否有AP的关键参数更新值发生变化。
  3. 根据权利要求2所述的方法，其特征在于，
    当所述第一AP多链路设备中的AP对应的关键基本服务集合BSS参数事件中的任一事件发生时，所述第一AP调整所述AP的关键参数更新值。
  4. 根据权利要求3所述的方法，其特征在于，
    所述关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，
    所述管理帧还包括非传输基本服务集标识BSSID字段，所述非传输BSSID字段包括第二指示信息；其中，所述第二指示信息用于指示第二AP多链路设备中是否有其他AP已发生信道变更，所述第二AP多链路设备中的至少一个AP与所述第一AP属于同一个多BSSID集合。
  6. 根据权利要求5所述的方法，其特征在于，
    所述非传输BSSID字段包括第二关键参数更新标志信令；其中，所述第二关键参数更新标志信令用于指示所述第二AP多链路设备中是否有AP的关键参数更新值发生变化。
  7. 根据权利要求6所述的方法，其特征在于，
    当所述第二AP多链路设备中的AP对应的关键BSS参数事件中的任一事件发生时，所述第一AP调整所述AP的关键参数更新值的取值。
  8. 一种通信方法，其特征在于，包括：
    第一接入点AP生成管理帧；其中，当第一AP多链路设备中有AP发生信道变更后，所述管理帧包括ML元素，所述ML元素包括已发生信道变更的AP的信道变更信息，且持续到所述第一AP发送的下一个发送业务指示图DTIM信标帧；所述第一AP多链路设备包括所述第一AP；
    所述第一AP向第一站点STA发送所述管理帧。
  9. 根据权利要求8所述的方法，其特征在于，
    当第二AP多链路设备中有AP发生信道变更后，所述ML元素还包括所述第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到所述第一AP发送的下一个 DTIM信标帧；所述第二AP多链路设备中的至少一个AP与所述第一AP属于同一个多BSSID集合。
  10. 根据权利要求8或9所述的方法，其特征在于，
    所述信道变更信息包括信道变更相关的元素；或者
    所述信道变更信息包括AP变更后的操作集和信道号；或者
    所述信道变更信息包括AP变更后的信道号。
  11. 根据权利要求10所述的方法，其特征在于，包括：
    当所述信道变更信息包括所述信道变更相关的元素时，所述信号变更相关的元素位于所述ML元素中的站点STA概括字段；或者
    当所述信道变更信息包括所述AP变更后的操作集和信道号时，所述AP变更后的操作集和信道号位于所述ML元素中的STA信息字段；或者
    当所述信道变更信息包括所述AP变更后的信道号时，所述AP变更后的信道号位于所述ML元素中的STA信息字段。
  12. 根据权利要求8-11任一项所述的方法，其特征在于，
    所述管理帧还包括信道变更计数字段；其中，当所述信道变更计数字段的取值为第一取值时，所述信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当所述信道变更计数字段的取值为第二取值时，所述信道变更计数字段用于指示信道变更会随时在所述管理帧发送完之后发生或者信道变更已经发生。
  13. 一种通信方法，其特征在于，包括：
    第一站点STA接收来自第一接入点AP的管理帧；其中，所述管理帧包括能力信息字段，所述能力信息字段包括第一指示信息；所述第一指示信息用于指示第一AP多链路设备中是否有其他AP已发生信道变更；所述第一AP多链路设备包括所述第一AP；STA多链路设备包括所述第一STA；
    当所述第一指示信息用于指示所述第一AP多链路设备中有其他AP已发生信道变更，所述第一STA获取发生信道变更后的AP的信道变更信息，所述STA多链路设备中与所述发生信道变更后的AP关联的STA获取所述信道变更信息。
  14. 根据权利要求13所述的方法，其特征在于，
    所述能力信息字段还包括第一关键参数更新标志信令；其中，所述第一关键参数更新标志信令用于指示所述第一AP多链路设备中是否有AP的关键参数更新值发生变化。
  15. 根据权利要求13或14所述的方法，其特征在于，
    所述第一AP多链路设备中的AP的关键参数更新值的取值，根据所述AP对应的关键基本服务集合BSS参数事件中任一事件的发生进行调整。
  16. 根据权利要求15所述的方法，其特征在于，
    所述关键BSS参数事件包括下述事件中的至少一个事件：更改增强型分布式信道访问EDCA参数元素、修改直接序列扩频DSSS参数集合元素、修改高吞吐量HT操作元素、包括宽带宽信道更变元素、包括宽带宽信道更变封套元素、包括操作模式通知元素、修改极高吞吐量VHT操作元素、修改高效HE操作元素、插入广播目标唤醒时间TWT元素、包括BSS颜色变更通知元素、修改多用户MU EDCA参数集合元素、修改空间复用参数集合元素、修改极高吞吐量EHT操作元素。
  17. 根据权利要求13-16任一项所述的方法，其特征在于，
    所述管理帧还包括非传输基本服务集标识BSSID字段，所述非传输BSSID字段包括第二指示信息；其中，所述第二指示信息用于指示第二AP多链路设备中是否有其他AP已发生信道变更，所述第二AP多链路设备中的至少一个AP与所述第一AP属于同一个多BSSID集合。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    当所述第二指示信息用于指示所述第二AP多链路设备中有AP已发生信道变更，所述第一STA获取发生信道变更后的AP的信道变更信息，使得所述STA多链路设备中，与所述发生信道变更后的AP关联的STA获取所述信道变更信息。
  19. 根据权利要求17或18所述的方法，其特征在于，
    所述非传输BSSID字段包括第二关键参数更新标志信令；其中，所述第二关键参数更新标志信令用于指示所述第二AP多链路设备中是否有AP的关键参数更新值发生变化。
  20. 根据权利要求19所述的方法，其特征在于，
    所述第二AP多链路设备中的AP的关键参数更新值的取值，根据所述AP对应的关键BSS参数事件中任一事件的发生进行调整。
  21. 一种通信方法，其特征在于，
    第一站点STA接收来自第一接入点AP的管理帧；其中，所述管理帧包括所述ML元素，所述ML元素包括第一AP多链路设备中发生信道变更后的AP的信道变更信息，且持续到所述第一STA接收到所述第一AP发送的下一个发送业务指示图DTIM信标帧；所述第一AP多链路设备包括所述第一AP；STA多链路设备包括所述第一STA；
    所述第一STA根据所述ML元素获取所述信道变更信息，以使所述STA多链路设备中，与所述发生信道变更后的AP关联的STA获取所述信道变更信息。
  22. 根据权利要求21所述的方法，其特征在于，
    所述ML元素还包括第二AP多链路设备中已发生信道变更的AP的信道变更信息，且持续到所述第一STA接收到所述第一AP发送的下一个发送业务指示图DTIM信标帧；所述第二AP多链路设备中的至少一个AP与所述第一AP属于同一个多BSSID集合。
  23. 根据权利要求21或22所述的方法，其特征在于，
    所述信道变更信息包括信道变更相关的元素；或者
    所述信道变更信息包括AP变更后的操作集和信道号；或者
    所述信道变更信息包括AP变更后的信道号。
  24. 根据权利要求23所述的方法，其特征在于，包括：
    当所述信道变更信息包括所述信道变更相关的元素时，所述信号变更相关的元素位于所述ML元素中的站点STA概括字段；或者
    当所述信道变更信息包括所述AP变更后的操作集和信道号时，所述AP变更后的操作集和信道号位于所述ML元素中的STA信息字段；或者
    当所述信道变更信息包括所述AP变更后的信道号时，所述AP变更后的信道号位于所述ML元素中的STA信息字段。
  25. 根据权利要求21-24任一项所述的方法，其特征在于，
    所述管理帧还包括信道变更计数字段；其中，当所述信道变更计数字段的取值为第三 取值时，所述信道变更计数字段用于指示信道变更会在下一个信标帧目标传输时间之前立即发生；当所述信道变更计数字段的取值为第四取值时，所述信道变更计数字段用于指示信道变更会随时在所述管理帧发送完之后发生或者信道变更已经发生。
  26. 一种通信装置，其特征在于，所述通信装置包括处理器；所述处理器，用于运行计算机程序或指令，以使如权利要求1-7任一项所述的通信方法被执行，或者如权利要求8-12任一项所述的通信方法被执行，或者如权利要求13-20任一项所述的通信方法被执行，或者如权利要求21-25任一项所述的通信方法被执行。
  27. 一种通信装置，其特征在于，所述通信装置包括处理器和通信接口；所述通信接口和所述处理器耦合，所述处理器用于运行计算机程序或指令，以使如权利要求1-7任一项所述的通信方法被执行，或者如权利要求8-12任一项所述的通信方法被执行，或者如权利要求13-20任一项所述的通信方法被执行，或者如权利要求21-25任一项所述的通信方法被执行，所述通信接口用于与所述通信装置之外的其它模块进行通信。
  28. 一种通信装置，其特征在于，所述通信装置包括接口电路和逻辑电路，所述接口电路，用于获取输入信息和/或输出信息，所述逻辑电路用于执行如权利要求1-7任一项所述的通信方法，或者如权利要求8-12任一项所述的通信方法，或者如权利要求13-20任一项所述的通信方法，或者如权利要求21-25任一项所述的通信方法，根据所述输入信息进行处理和/或生成所述输出信息。
  29. 一种计算机可读存储介质，其特征在于，计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得如权利要求1-7任一项所述的通信方法被执行，或者如权利要求8-12任一项所述的通信方法被执行，或者如权利要求13-20任一项所述的通信方法被执行，或者如权利要求21-25任一项所述的通信方法被执行。
  30. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机指令；当部分或全部所述计算机指令在计算机上运行时，使得如权利要求1-7任一项所述的通信方法被执行，或者如权利要求8-12任一项所述的通信方法被执行，或者如权利要求13-20任一项所述的通信方法被执行，或者如权利要求21-25任一项所述的通信方法被执行。
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