WO2023155149A1 - 无线通信的方法和设备 - Google Patents

无线通信的方法和设备 Download PDF

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Publication number
WO2023155149A1
WO2023155149A1 PCT/CN2022/076874 CN2022076874W WO2023155149A1 WO 2023155149 A1 WO2023155149 A1 WO 2023155149A1 CN 2022076874 W CN2022076874 W CN 2022076874W WO 2023155149 A1 WO2023155149 A1 WO 2023155149A1
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Prior art keywords
mode
field
indicate
transmission
information
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PCT/CN2022/076874
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English (en)
French (fr)
Inventor
周培
黄磊
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/076874 priority Critical patent/WO2023155149A1/zh
Publication of WO2023155149A1 publication Critical patent/WO2023155149A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • the embodiments of the present application relate to the communication field, and in particular to a method and device for wireless communication.
  • the multi-access point (Access Point, AP) cooperative transmission technology of the coordinated beamforming (Coordinated Beamforming, C-BF) mode is introduced.
  • C-BF is a method in which multiple APs pass beamforming and will be useful.
  • the present application provides a method and device for wireless communication, which are beneficial to realize effective interference suppression and improve SINR of a communication link.
  • a method for wireless communication including: a first access point AP sends first information to at least one second AP, and the first information is used to indicate that the APs in the multi-AP coordination set use coordinated beams
  • a wireless communication method including: a second access point AP receiving first information sent by the first AP, the first information is used to indicate that the APs in the multi-AP coordination
  • an access point configured to execute the method in the above first aspect or various implementations thereof.
  • the access point includes a functional module for executing the method in the above first aspect or each implementation manner thereof.
  • an access point configured to execute the method in the above-mentioned second aspect or various implementations thereof.
  • the access point includes a functional module for executing the method in the above second aspect or each implementation manner thereof.
  • an access point including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the above first aspect or its various implementations.
  • an access point including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the above second aspect or its various implementations.
  • a chip is provided for implementing any one of the above first aspect to the second aspect or the method in each implementation manner thereof.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes any one of the above-mentioned first to second aspects or any of the implementations thereof. method.
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.
  • a ninth aspect provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the above first to second aspects or the method in each implementation manner.
  • a computer program which, when running on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner.
  • the first AP can collect the participation status of the APs in the multi-AP cooperation set and their associated STAs in the multi-AP cooperative transmission of C-BF, and further notify the participation status to the multi-AP cooperation participating in C-BF
  • the transmitting AP so that the AP participating in the multi-AP cooperative transmission of C-BF can determine the target channel state information used to calculate the steering matrix in the pre-stored channel state information according to the participation situation, and calculate the steering matrix based on the target channel state information, Further, based on the steering matrix, multi-AP cooperative transmission in C-BF mode is conducive to sending useful signals to target STAs and sending nulls (Null) to OBSS STAs to achieve effective interference suppression and improve the SINR of communication links .
  • Null null
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a wired multi-AP cooperation architecture applicable according to an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a wireless multi-AP cooperation architecture applicable according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a C-BF provided according to an embodiment of the present application.
  • Fig. 5 is a flowchart of channel detection of a C-BF provided according to an embodiment of the present application.
  • FIG. 6 is a schematic interaction diagram of a wireless communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a frame format of a coordinated transmission notification frame provided by an embodiment of the present application.
  • FIG. 8 is a schematic format diagram of the adopted coordinated transmission mode field in the coordinated transmission notification frame shown in FIG. 7 .
  • FIG. 9 is a schematic format diagram of the C-BF parameter field in the coordinated transmission notification frame shown in FIG. 7 .
  • Fig. 10 is a schematic interaction diagram of a preparation stage provided by an embodiment of the present application.
  • Fig. 11 is a schematic interaction diagram of another preparation stage provided by the embodiment of the present application.
  • Fig. 12 is a schematic diagram of a frame format of a cooperative transmission request frame provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a frame format of a cooperative transmission response frame provided by an embodiment of the present application.
  • FIG. 14 is a schematic format diagram of an accepted coordinated transmission mode field in the coordinated transmission response frame shown in FIG. 13 .
  • FIG. 15 is a schematic format diagram of the C-BF information field in the coordinated transmission response frame shown in FIG. 13 .
  • Fig. 16 is a schematic interaction diagram of a multi-AP cooperative transmission process according to an embodiment of the present application.
  • FIG. 17 is a schematic interaction diagram for carrying first information in a coordinated transmission trigger frame provided by an embodiment of the present application.
  • FIG. 18 is another schematic interaction diagram for carrying first information in a coordinated transmission trigger frame provided by an embodiment of the present application.
  • Fig. 19 is a schematic block diagram of an access point provided by an embodiment of the present application.
  • Fig. 20 is a schematic block diagram of another access point provided by an embodiment of the present application.
  • Fig. 21 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • Fig. 22 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • Fig. 23 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • Wireless Local Area Networks Wireless Local Area Networks, WLAN
  • Wireless Fidelity Wireless Fidelity, WiFi
  • other communication systems for example: Wireless Local Area Networks (Wireless Local Area Networks, WLAN), Wireless Fidelity (Wireless Fidelity, WiFi) or other communication systems.
  • the communication system 100 may include an access point (Access Point, AP) 110, and a station (STATION, STA) 120 accessing a network through the access point 110.
  • Access Point Access Point
  • STA station
  • an AP is also called an AP STA, that is, in a sense, an AP is also a kind of STA.
  • STA is also called non-AP STA (non-AP STA).
  • the communication in the communication system 100 may be the communication between the AP and the non-AP STA, or the communication between the non-AP STA and the non-AP STA, or the communication between the STA and the peer STA, wherein, the peer STA It can refer to a device that communicates peer-to-peer with an STA.
  • a peer STA may be an AP or a non-AP STA.
  • the AP is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet.
  • the AP device can be a terminal device (such as a mobile phone) or a network device (such as a router) with a WiFi chip.
  • the role of the STA in the communication system is not absolute.
  • the mobile phone when the mobile phone is connected to the router, the mobile phone is a non-AP STA, and when the mobile phone is used as a hotspot for other mobile phones, the mobile phone acts as an AP. .
  • AP and non-AP STA can be applied to the equipment in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras in smart homes, smart remote controls, smart water meters, etc. And sensors in smart cities, etc.
  • IoT Internet of Things
  • the non-AP STA can support the 802.11be standard.
  • the non-AP STA can also support 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a and other current and future wireless local area networks (wireless local area networks, WLAN) standards of the 802.11 family.
  • 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a and other current and future wireless local area networks (wireless local area networks, WLAN) standards of the 802.11 family.
  • WLAN wireless local area networks
  • the AP may be a device supporting the 802.11be standard.
  • the AP may also be a device supporting various current and future WLAN standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • the STA may be a mobile phone (Mobile Phone), tablet computer (Pad), computer, virtual reality (Virtual Reality, VR) device, augmented reality (Augmented Reality, AR) device, Wireless devices in industrial control, set-top boxes, wireless devices in self driving, vehicle communication devices, wireless devices in remote medical, wireless devices in smart grid , wireless devices in transportation safety, wireless devices in smart city or wireless devices in smart home, wireless communication chips/ASIC/SOC/etc.
  • the frequency bands supported by the WLAN technology may include but not limited to: low frequency bands (eg 2.4GHz, 5GHz, 6GHz) and high frequency bands (eg 60GHz).
  • low frequency bands eg 2.4GHz, 5GHz, 6GHz
  • high frequency bands eg 60GHz
  • FIG. 1 exemplarily shows one AP STA and two non-AP STAs.
  • the communication system 100 may include multiple AP STAs and other numbers of non-AP STAs. This embodiment of the present application does not include Do limited.
  • a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device.
  • the communication equipment may include an access point 110 and a station 120 with a communication function, and the access point 110 and the station 120 may be the specific equipment described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, gateways and other network entities, which are not limited in this embodiment of the present application.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • predefinition can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate related information in devices (for example, including access points and stations).
  • the implementation method is not limited.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may include the WiFi protocol and related protocols applied to future WiFi communication systems, which is not limited in the present application.
  • the establishment of the multi-AP cooperative set includes the following two stages: the multi-AP cooperative capability discovery stage and the multi-AP cooperative set establishment stage.
  • APs can discover each other's multi-AP cooperation capabilities by receiving beacon (Beacon) frames or other management frames sent by neighboring APs.
  • Beacon beacon
  • the AP that initiates multi-AP cooperative transmission is called the master AP (Master AP, MAP), and the MAP selects its surrounding secondary APs (Slave AP, SAP) (one or more SAPs) to participate in the multi-AP Collaborative transmission.
  • Master AP Master AP
  • SAP secondary AP
  • MAP and SAP will exchange some information for configuring multi-AP cooperation sets.
  • the specific steps and interactive information are as follows:
  • the MAP sends a request (Request) frame to the SAPs, mainly including the following information: assigning the identification (identity, ID) of the SAP during multi-AP cooperative transmission, and assigning the ID of the multi-AP cooperative set;
  • the SAP replies to the MAP with a Response frame, which mainly includes the following information: the information of the STA associated with the SAP, including the ID of the STA and the capability information of participating in the multi-AP cooperative transmission; the priority of the STA participating in the multi-AP cooperative transmission.
  • APs participating in multi-AP coordinated transmission may include the following roles:
  • MAP Master AP
  • SAP Seve AP
  • Coordinating AP Coordinating AP
  • Coordinated AP Coordinated AP
  • Sharing AP Sharing AP
  • Shared AP Shared AP
  • the AP of the MAP role initiates the request of the multi-AP cooperative set establishment to the AP of the SAP role; in the channel sounding phase, the cooperative AP of the cooperative AP role initiates channel sounding (channel sounding), The AP of the coordinated AP role participates in channel detection; in the preparation (preparation) phase and/or the coordinated transmission (Coordinated Transmission) phase, the AP sharing the AP role shares its transmission opportunity (transmission opportunity, TXOP) resource to the shared AP Role APs perform cooperative transmission.
  • TXOP transmission opportunity
  • the present application can be applied to the wired multi-AP cooperative transmission architecture as shown in FIG. 2 , and can also be applied to the wireless multi-AP cooperative transmission architecture as shown in FIG. 3 .
  • the coordinator (Coordinator) in the network is in a certain AP and controls other APs through wired connections; as shown in (b) in Figure 2 Indicates that there is an independent coordinator (Coordinator) in the network, which controls other APs through wired connections.
  • the establishment of the multi-AP cooperative set is directly set by the network operator at the controller (Controller).
  • the coordinator (Coordinator) in the network is located in a certain AP (called MAP), and controls other APs (called SAPs) through wireless means.
  • MAP a certain AP
  • SAPs other APs
  • the coordinated beamforming Coordinated Beamforming, C-BF
  • C-BF is that multiple APs send useful signals to or aim at the target STA through beamforming method, and at the same time send Null to or to the target STA.
  • Quasi-overlapping Basic Service Set (Overlapping Basic Service Set, OBSS) STA, so it can achieve interference suppression, improve the signal to interference and noise ratio (Signal to Interference plus Noise Ratio, SINR) of the communication link, thereby improving throughput and reducing communication time delay.
  • SINR Signal to Interference plus Noise Ratio
  • multiple APs in the multi-AP cooperative set can perform sequential channel sounding.
  • multiple APs sequentially send Null Data Physical Layer Protocol Data Units (Null Data PPDU, NDP) to associated STAs and non-associated OBSS STAs for channel detection, and each AP triggers by sending (Beamforming Report Poll, BFRP) ( Trigger) frame to collect channel detection results, that is, channel state information (Channel State Information, CSI), and associated STAs and OBSS STAs can feed back channel detection results.
  • Null Data Physical Layer Protocol Data Units Null Data Physical Layer Protocol Data Units
  • BFRP Beamforming Report Poll
  • CSI Channel State Information
  • the multi-AP cooperative set includes AP1 and AP2, AP1 is MAP, AP2 is SAP, AP1 is associated with STA 11 -STA 1N , and AP2 is associated with STA 21 -STA 2N .
  • AP1 sends an NDP Announcement (NDPA) 1 frame to announce that it will send an NDP frame, and sends an NDP1 frame after a short interframe space (SIFS), and the STA associated with AP1 and AP2 receives the NDP1 frame , to get the channel detection result, AP1 sends a BFRP Trigger frame to trigger AP1 and AP2 and its associated STA to report the channel detection result; then, AP2 sends an NDPA2 frame to announce that it will send an NDP frame, and sends an NDP2 frame after SIFS, and the STA associated with AP1 and AP2 After receiving the NDP2 frame, the channel detection result is obtained, and AP2 sends a BFRP Trigger frame to trigger the STA associated with AP1 and AP2 to report the channel detection result.
  • NDPA NDP Announcement
  • SIFS short interframe space
  • the APs in the multi-AP cooperative set first need to calculate the steering matrix (steering matrix) for the multi-AP cooperative transmission. Specifically, the AP can calculate the steering matrix for the multi-AP cooperative transmission according to the collected channel detection results.
  • the SAP in the multi-AP cooperative set may not participate in the multi-AP cooperative transmission due to some reasons (for example, the channel state is busy), and the calculation of the steering matrix based on all the collected channel detection results will be Therefore, how to calculate the steering matrix for multi-AP cooperative transmission is an urgent problem to be solved.
  • FIG. 6 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 6, the method 200 includes the following content:
  • the first access point AP sends first information to at least one second AP.
  • the first AP and the at least one second AP belong to the multi-AP cooperative set.
  • the first AP is a shared AP (Sharing AP)
  • the second AP is a shared AP (Shared AP).
  • the first AP is a MAP and the second AP is a SAP.
  • the first AP is both a Sharing AP and a MAP.
  • the APs in the multi-AP cooperative set have pre-stored channel state information, and the channel state information may be acquired during a channel detection phase, for example, acquired during a latest channel detection phase. This channel state information can be used to calculate the steering matrix for C-BF.
  • the steering matrix used for C-BF is also called a C-BF steering matrix, or a transmission matrix (TX Matrix).
  • the channel state information may include channel state information between the AP and an associated STA and channel state information between the AP and an unassociated STA (for example, an OBSS STA), where the associated STA refers to the channel state information between the AP and an unassociated STA (for example, OBSS STA).
  • OBSS STA refers to the STA in the OBSS of the AP.
  • the multi-AP cooperative transmission mode of C-BF in the embodiment of the present application is applicable to a relatively static scenario where the location of the AP and/or STA is relatively fixed and the wireless channel of the environment changes weakly.
  • the wireless communication environment changes greatly For example, APs and/or STAs have obvious location changes or other APs and/or STAs are newly added
  • the pre-stored channel state information cannot accurately reflect the CSI information between each AP and each STA.
  • the cooperative transmission of the steering matrix calculated based on the channel state information before the wireless communication environment changes may make the performance of C-BF poor.
  • the channel state information and then recalculate according to the latest channel state information to obtain a new steering matrix, so that the performance of C-BF can be kept at the best state.
  • the first information is used to indicate the participation of APs in the multi-AP cooperation set in multi-AP coordinated transmission in C-BF mode and/or the STAs associated with the APs in the multi-AP cooperation set for Participation in multi-AP cooperative transmission in C-BF mode.
  • the AP's participation in the multi-AP coordinated transmission in the C-BF mode may include whether the AP participates in the C-BF multi-AP coordinated transmission, and the STA's participation in the C-BF multi-AP coordinated transmission may be Including whether the STA participates in multi-AP coordinated transmission in C-BF mode.
  • participating in multi-AP cooperative transmission in C-BF mode is also referred to as participating in C-BF
  • multi-AP cooperative transmission is also referred to as cooperative transmission.
  • APs participating in multi-AP coordinated transmission in C-BF mode may also be expressed as APs participating in C-BF
  • STAs participating in multi-AP coordinated transmission in C-BF mode may be expressed as STAs participating in C-BF.
  • the APs participating in C-BF in the multi-AP cooperative set are recorded as the first type of APs
  • the APs in the multi-AP cooperative set that do not participate in C-BF are recorded as the second type of APs
  • the APs participating in C-BF The STAs that do not participate in the C-BF are marked as the first type STAs
  • the STAs that do not participate in the C-BF are marked as the second type STAs.
  • the at least one second AP is a first type of AP.
  • the first AP only notifies the APs participating in the C-BF of the first information.
  • the first information may indicate at least one of the following:
  • the first type of AP The first type of AP, the second type of AP, the first type of STA, and the second type of STA.
  • the second AP may determine the APs participating in the C-BF and/or the STAs participating in the C-BF according to the first information.
  • the first type of STA may be the first type of STA corresponding to the first type of AP
  • the second type of STA The STA may be a second-type STA corresponding to the first-type AP.
  • the first information may indicate at least one of the following:
  • the first type of AP The first type of AP, the second type of AP, the first type of STA associated with the first type of AP, and the second type of STA associated with the first type of AP.
  • the first information is used to indicate at least one of the following:
  • At least one AP including APs participating in multi-AP coordinated transmission in C-BF mode in the multi-AP cooperative set, and/or APs in the multi-AP cooperative set that do not participate in multi-AP coordinated transmission in C-BF mode;
  • each STA set corresponds to an AP participating in the multi-AP coordinated transmission in the C-BF mode
  • the STA set includes STAs participating in the multi-AP coordinated transmission in the C-BF mode among the STAs associated with the corresponding AP, and /or, among the STAs associated with the corresponding AP, the STAs that do not participate in the multi-AP coordinated transmission in the C-BF mode.
  • the at least one AP includes at least one first-type AP and/or at least one second-type AP.
  • each STA set in the at least one STA set corresponds to a first-type AP
  • each STA set includes the first-type STAs associated with the first-type AP and/or the first-type STAs associated with the first-type AP.
  • the second type of AP is the first-type STAs associated with the first-type AP and/or the first-type STAs associated with the first-type AP.
  • the second AP participating in C-BF can calculate the channel state information used by the second AP according to the first information and the channel state information pre-stored by the second AP.
  • the second AP can eliminate the channel state information between the second AP and the second type of STAs in the pre-stored channel state information according to the first information, and only base on the second AP and the second type of STA
  • the channel state information between a class of STAs calculates the steering matrix, and further multi-AP cooperative transmission based on the steering matrix is conducive to ensuring that the second AP sends useful signals to the target STA and sends nulls (Null) to the OBSS STA to achieve Effective interference suppression improves the SINR of the communication link.
  • the APs in the multi-AP cooperating set may know the APs included in the multi-AP cooperating set and the associated STAs of other APs in the multi-AP cooperating set. For example, in the stage of establishing a multi-AP cooperative set, each AP can learn about STAs associated with other APs through information exchange.
  • Case 1 the first information only indicates at least one AP of the first type.
  • the second AP may consider that all STAs associated with the at least one AP of the first type participate in C-BF, that is, all STAs associated with the AP of the at least one first type are of the first type
  • all APs in the multi-AP cooperative set except the at least one first-type AP are second-type APs
  • all STAs associated with the second-type APs are second-type STAs.
  • the first information may only indicate the APs participating in C-BF do not need to indicate the participation status of their associated STAs.
  • Case 2 the first information only indicates at least one AP of the second type.
  • the second AP may consider that all STAs associated with the at least one second-type AP do not participate in C-BF, that is, all STAs associated with the at least one second-type AP are second STAs of the same type, all APs in the multi-AP cooperative set except the at least one AP of the second type are APs of the first type, and all STAs associated with the APs of the first type are STAs of the first type.
  • the first information may only indicate that APs involved in C-BF.
  • Case 3 the first information only indicates at least one first-type AP and at least one first-type STA set.
  • the number of first-type APs and first-type STA sets may be the same, each first-type AP corresponds to a first-type STA set, and each first-type STA set is used to indicate the corresponding STAs participating in the C-BF associated with the AP of the first type, the other STAs associated with the AP of the first type are all STAs of the second type.
  • the number of the first type of AP and the first type of STA set may be different, for example, the number of the first type of AP is greater than the number of the first type of STA set.
  • the first type of AP that does not correspond to the first type of STA set, it can be considered that all the associated STAs participate in C-BF, and for the first type of AP corresponding to the first type of STA set, it can be based on The corresponding first-type STA set determines the STAs participating in C-BF among the STAs associated with the first-type AP, and then the other STAs associated with the first-type AP are all second-type STAs.
  • Case 4 the first information only indicates at least one first-type AP and at least one second-type STA set.
  • the number of first-type APs and second-type STA sets can be the same, each first-type AP corresponds to a second-type STA set, and each second-type STA set is used to indicate the corresponding The STA associated with the first-type AP that does not participate in C-BF, the other STAs associated with the first-type AP are all the first-type STAs.
  • the numbers of the first type of APs and the second type of STA sets may be different, for example, the number of the first type of APs is greater than the number of the second type of STA sets.
  • the first type of AP that does not correspond to the second type of STA set it can be considered that all the associated STAs participate in C-BF, and for the first type of AP corresponding to the second type of STA set, it can be based on The corresponding STA set of the second type determines that the STAs associated with the AP of the first type do not participate in C-BF, and the other STAs associated with the AP of the first type are all STAs of the first type.
  • the first information may directly indicate at least one first-type AP and/or at least one second-type AP.
  • the first information includes an identifier (Identity, ID) of at least one AP of the first type, or an ID of at least one AP of the second type.
  • identifier Identity, ID
  • the first AP may explicitly indicate the ID of the AP participating in the C-BF, or the ID of the AP not participating in the C-BF.
  • the first information may indicate at least one first-type AP and/or at least one second-type AP in a bitmap (bitmap) manner.
  • the first information includes a first C-BF bitmap
  • the first C-BF bitmap includes N bits
  • each bit corresponds to an AP in the multi-AP cooperation set
  • the first bit corresponds to a multi-AP cooperation
  • the second bit corresponds to the second AP in the multi-AP cooperation set, etc.
  • the value of each bit is used to indicate whether the corresponding AP participates in C-BF, where N is multi-AP cooperation
  • the number of APs included in the set, N is a positive integer greater than 1.
  • the first information may not include the IDs of the APs in the multi-AP cooperating set, and only need to include the first C -BF bitmap, as long as the APs in the multi-AP cooperative set have the same understanding of the corresponding relationship between each bit in the first C-BF bitmap and the AP.
  • the first information may directly indicate at least one set of STAs of the first type and/or at least one set of STAs of the second type.
  • the first information includes at least one list of STAs participating in C-BF (that is, the first type of STA set) and/or at least one list of STAs that do not participate in C-BF (that is, the second type of STA set), wherein each participating The STA list of C-BF corresponds to a first-type AP, and each STA list that does not participate in C-BF corresponds to a first-type AP.
  • the STA list participating in C-BF is used to indicate the corresponding first-type AP associated
  • the first type of STA the list of STAs not participating in C-BF is used to indicate the second type of STA associated with the corresponding first type of AP.
  • the first AP may indicate IDs of STAs participating in C-BF or IDs of STAs not participating in C-BF associated with APs of the first type.
  • the first information may indicate at least one set of STAs of the first type and/or at least one set of STAs of the second type in a bitmap (bitmap) manner.
  • the first information includes at least one associated STA list and at least one second C-BF bitmap, each STA list corresponds to a first-type AP, and each second C-BF bitmap corresponds to a first-type AP, so
  • the associated STA list is used to indicate all STAs associated with the corresponding first type of AP
  • the second C-BF bitmap includes K bits, and each bit corresponds to a STA in the associated STA list of the first type of AP, for example
  • the first bit corresponds to the first STA in the associated STA list of the first type of AP
  • the second bit corresponds to the second STA in the associated STA list of the first type of AP, etc.
  • the value of each bit is used to indicate Whether the corresponding STA participates in C-BF, where K is the number of STAs associated with the first type of AP, and K is a positive integer.
  • the first information may not include the at least one associated STA list, and only needs to include at least A second C-BF bitmap, as long as the APs in the multi-AP cooperative set have the same understanding of the corresponding relationship between each bit in the second C-BF bitmap and the STA.
  • the first information further includes first indication information, and the first indication information is used to indicate the coordinated transmission mode adopted, for example, the first indication information is used to indicate the multi-AP adopting C-BF mode Collaborative transmission.
  • the first information is carried in a first frame, and the first frame includes a Coordinated Transmission Announcement (Coordinated TX Announce) field, and the Coordinated Transmission Announcement field is used to carry the first information.
  • Coordinated Transmission Announcement Coordinated TX Announce
  • the first frame may be called a Coordinated TX Announce (Coordinated TX Announce) frame, or other similar names, which is not limited in this application.
  • Coordinated TX Announce Coordinated TX Announce
  • FIG. 7 is a schematic diagram of a frame format of a coordinated transmission notification frame provided by an embodiment of the present application. It should be understood that the information carried in the frame format shown in FIG. 7 and the position and size of each field in the frame format are only examples, which can be flexibly adjusted according to actual needs or carried information, and when the first information passes.
  • the frame format of the coordinated transmission notification frame may be adaptively adjusted, which is not limited in the present application.
  • the coordinated transmission notification frame may include the following fields (or in other words, fields) (field):
  • Frame Control occupies 2 bytes
  • length occupies 2 bytes
  • receiving address Receiving Address, RA
  • Send address Transmission Address, TA
  • Coordinated TX Announce Coordinated TX Announce
  • Frame Check Sequence Frarame Check Sequence, FCS
  • the coordinated transmission notification field includes at least one of the following fields:
  • the adopted coordinated transmission mode field (Coordinated TX Scheme Adopted field) is used to indicate the mode adopted for performing multi-AP coordinated transmission, that is, to carry the aforementioned first indication information;
  • the C-BF Parameters field (C-BF Parameters field) is used to indicate the parameters or commands used in the multi-AP cooperative transmission of the C-BF mode, that is, to carry the aforementioned first information;
  • C-OFDMA Parameters field Coordinated Orthogonal Frequency Division Multiple Access (C-OFDMA Parameters field), which is used to indicate the parameters or commands used for multi-AP cooperative transmission in C-OFDMA mode ;
  • C-SR Parameters field is used to indicate the parameters or commands used for multi-AP cooperative transmission in the C-SR mode
  • J-TX Parameters field Joint Transmission (J-TX Parameters field, which is used to indicate the parameters or commands used for multi-AP cooperative transmission in J-TX mode;
  • Coordinated Uplink Multiple-User Multiple Input Multiple Output (Coordinated Uplink Multiple-User Multiple Input Multiple Output, C-UL MU MIMO) parameter field (C-UL MU-MIMO Parameters field), used to indicate the implementation of C-UL MU MIMO mode Parameters or commands used by APs for cooperative transmission.
  • C-UL MU MIMO Coordinated Uplink Multiple-User Multiple Input Multiple Output
  • C-UL MU MIMO Parameters field used to indicate the implementation of C-UL MU MIMO mode Parameters or commands used by APs for cooperative transmission.
  • the Coordinated TX Scheme Adopted field may occupy 1 byte.
  • the number of bytes occupied by the C-BF Parameters field is variable.
  • the C-OFDMA Parameters field may occupy 1 byte.
  • the C-SR Parameters field may occupy 1 byte.
  • the J-TX Parameters field may occupy 1 byte.
  • the C-UL MU-MIMO Parameters field may occupy 1 byte.
  • the Coordinated TX Scheme Adopted field includes at least one of the following fields:
  • C-BF C-BF Adopted
  • C-OFDMA C-OFDMA Adopted
  • the C-SR (C-SR Adopted) field is used to indicate whether to adopt multi-AP cooperative transmission in C-SR mode
  • J-TX Adopted Use the J-TX (J-TX Adopted) field to indicate whether to use J-TX mode for multi-AP cooperative transmission;
  • the C-UL MU MIMO (C-UL MU-MIMO Adopted) field is used to indicate whether to use the C-UL MU MIMO mode for multi-AP cooperative transmission.
  • the value of the C-BF Adopted field is 1 to indicate multi-AP cooperative transmission in C-BF mode.
  • the first frame includes the C-BF Parameters field; the value of the C-BF Adopted field is 0 Indicates that multi-AP cooperative transmission in C-BF mode is not performed. In this case, the first frame does not include the C-BF Parameters field.
  • the value of the C-OFDMA Adopted field is 1 to indicate multi-AP cooperative transmission in C-OFDMA mode.
  • the first frame includes the C-OFDMA Parameters field; the value of the C-OFDMA Adopted field is 0 Indicates that multi-AP cooperative transmission in C-OFDMA mode is not performed. In this case, the first frame does not include the C-OFDMA Parameters field.
  • the value of the C-SR Adopted field is 1 to indicate multi-AP cooperative transmission in C-SR mode.
  • the first frame includes the C-SR Parameters field; the value of the C-SR Adopted field is 0 Indicates that multi-AP cooperative transmission in C-SR mode is not performed. In this case, the first frame does not include the C-SR Parameters field.
  • the value of the J-TX Adopted field is 1 to indicate multi-AP cooperative transmission in J-TX mode.
  • the first frame includes the J-TX Parameters field; the value of the J-TX Adopted field is 0 Indicates that multi-AP cooperative transmission in J-TX mode is not performed. In this case, the first frame does not include the J-TX Parameters field.
  • the value of the C-UL MU-MIMO Adopted field is 1 to indicate multi-AP cooperative transmission in the C-UL MU-MIMO mode.
  • the first frame includes the C-UL MU-MIMO Parameters field;
  • the value of the C-UL MU-MIMO Adopted field is 0, indicating that multi-AP cooperative transmission in the C-UL MU-MIMO mode is not performed.
  • the first frame does not include the C-UL MU-MIMO Parameters field.
  • the C-BF parameter field includes at least one of the following fields:
  • the number of APs (Number of APs) field is used to indicate the number of APs included in the first frame
  • At least one AP ID field used to indicate the AP that participates in the multi-AP coordinated transmission of the C-BF mode and/or the AP that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • each associated STA list field corresponds to an AP indicated by the at least one AP ID field, and the associated STA list field is used to indicate the STA list associated with the corresponding AP;
  • At least one C-BF bitmap (ie, the second C-BF bitmap in the foregoing) field, each C-BF bitmap field corresponds to an AP indicated by the at least one AP ID field, and the C-BF bit
  • the map field is used to indicate whether the STA in the STA list associated with the corresponding AP participates in multi-AP coordinated transmission in the C-BF mode. That is, at least one C-BF bitmap field is used to bear the second C-BF bitmap.
  • the at least one AP ID field may include the first AP ID (ie, 1 st AP ID) field, ..., the mth AP ID (ie, m th AP ID) fields, etc.
  • the first AP ID (1 st AP ID) field indicates the ID of the first AP participating in C-BF
  • the m th AP ID indicates the ID of the mth AP participating in C-BF.
  • the at least one AP ID field is used to indicate an AP participating in C-BF.
  • the at least one associated STA list field may include the STA list (Associated STA List of 1 st AP) associated with the first AP (that is, the AP indicated by the first AP ID field).
  • AP the STA list
  • the STA list Associated STA List of m th AP ID
  • the Associated STA List of 1 st AP field indicates The list of STAs associated with the first AP participating in C-BF
  • the Associated STA List of m th AP ID indicates the list of STAs associated with the mth AP participating in C-BF.
  • each associated STA list field includes at least one of the following fields:
  • the Number of Associated STAs (Number of Associated STAs) field is used to indicate the number of STAs associated with the current AP;
  • At least one STA ID field is used to indicate the STA associated with the current AP, wherein the k th STA ID is used to indicate the ID of the kth STA associated with the current AP.
  • the at least one C-BF bitmap field may include the C-BF bitmap of the STA associated with the first AP (that is, the AP indicated by the first AP ID field) (C-BF Bitmap of 1 st AP's Associated STAs) field, ..., STA list (C-BF Bitmap of m th AP's Associated STAs) associated with the mth AP (that is, the AP indicated by the mth AP ID field) fields etc.
  • the C-BF Bitmap of 1 st AP's Associated STAs field is used to indicate whether the STA in the STA list associated with the first AP participating in C-BF participates in C-BF
  • the C-BF Bitmap of m th AP's Associated STAs indicates the Whether the STAs in the STA list associated with m APs participating in C-BF participate in C-BF.
  • the C-BF bitmap field may include k STA Bitmaps, k represents the number of STAs associated with the AP, and each STA Bitmap corresponds to a STA associated with the AP, for example, 1 st STA Bitmap Corresponding to the 1st STA associated with the AP, the k th STA Bitmap corresponds to the k th STA associated with the AP, and the STA Bitmap corresponding to each STA is used to indicate whether the STA participates in C-BF. As an example, if a certain STA participates in C-BF, the STA Bitmap corresponding to the STA is set to 1, otherwise it is set to 0.
  • FIG. 9 only uses a bitmap to indicate STA participation in C-BF as an example. In other embodiments, it may also directly indicate STAs participating in C-BF or STAs not participating in C-BF.
  • the C-BF parameter field may also include at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP ID field used to indicate at least one AP participating in multi-AP cooperative transmission of C-BF mode
  • each STA list field participating in C-BF corresponds to an AP indicated by the at least one AP ID field, and the STA list field participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in multi-AP cooperative transmission in C-BF mode.
  • the C-BF parameter field includes at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP ID field used to indicate at least one AP participating in multi-AP cooperative transmission of C-BF mode
  • At least one STA list field that does not participate in C-BF each STA list field that does not participate in C-BF corresponds to an AP indicated by the at least one AP ID field, and the STA list field that does not participate in C-BF uses Indicates the STA associated with the corresponding AP that does not participate in multi-AP coordinated transmission in the C-BF mode.
  • the method 200 further includes:
  • the first AP sends first request information to at least one third AP, where the first request information is used to request the at least one third AP to participate in multi-AP coordinated transmission in C-BF mode, and the at least one third AP
  • the AP belongs to the multi-AP cooperative set.
  • the at least one third AP includes all APs in the multi-AP cooperative set.
  • the at least one third AP includes the at least one second AP.
  • the at least one second AP may be an AP participating in C-BF among the at least one third AP.
  • the first AP may request at least one third AP to participate in the C-BF, and further, only send the first information to the APs that agree to participate in the C-BF.
  • the first request information includes second indication information, where the second indication information is used to indicate the coordinated transmission mode that the first AP requests to participate in.
  • the second indication information is used to indicate a request to participate in multi-AP coordinated transmission in the C-BF mode.
  • the first AP when the second indication information indicates a request to participate in multi-AP cooperative transmission in C-BF mode, it may be considered that the first AP requests the at least one third AP to report that the AP and its associated STA are C-BF participation.
  • the first AP sends the first request information to at least one third AP, including:
  • the first AP sends the first request information to the at least one third AP by broadcasting or multicasting; or
  • the first AP sends the first request information to the at least one third AP in a unicast manner.
  • the first request information is carried in the second frame.
  • the second frame can be sent by broadcast, multicast or unicast.
  • the second frame is also called a Coordinated Transmission Request (Coordinated TX Request) frame, or other similar names, which is not limited in this application.
  • Coordinated TX Request Coordinated TX Request
  • the method 200 further includes:
  • the first AP receives first response information sent by each third AP in the at least one third AP.
  • the first response information is used to feed back whether the third AP participates in multi-AP coordinated transmission in C-BF mode and/or whether the STA associated with the third AP participates in multi-AP coordinated transmission in C-BF mode.
  • the first response information is carried in a third frame.
  • the third frame is also called a Coordinated Transmission Response (Coordinated TX Responce) frame, or other similar names, which is not limited in this application.
  • the first AP receives the first response information sent by each third AP in the at least one third AP, including:
  • the first AP receives the first response information sent synchronously by the at least one third AP;
  • the first AP receives the first response information sent asynchronously by the at least one third AP.
  • the third frame may be sent synchronously or asynchronously.
  • the first AP receives the third frame synchronously sent by at least one third AP.
  • the first AP when the second frame is sent in a unicast manner, receives the third frame asynchronously sent by at least one third AP.
  • the third AP may not indicate the participation of its associated STA in C-BF in the first response information. None of the STAs participated in C-BF.
  • the first AP may be indicated in the first response information about the participation of its associated STA in the C-BF.
  • the third AP may not indicate its associated STAs in the first response information For the participation of C-BF.
  • the first AP that receives the first response information determines that all STAs associated with the third AP participate in the C-BF according to the first response information.
  • the first response may directly indicate the first type of STA set and/or the second type of STA set corresponding to the third AP.
  • the first response information includes a list of STAs participating in C-BF (that is, the first type of STA set) and/or a list of STAs that do not participate in C-BF (that is, the second type of STA set), wherein the participating C-BF
  • the STA list is used to indicate the first-type STAs associated with the third AP
  • the STA list that does not participate in C-BF is used to indicate the second-type STAs associated with the third AP.
  • the third AP may explicitly indicate the ID of the STA participating in the C-BF associated with the third AP, or the ID of the STA not participating in the C-BF.
  • the first response information may indicate the first-type STA set and/or the second-type STA set corresponding to the third AP in a bitmap (bitmap) manner.
  • the first response information includes an associated STA list and a third C-BF bitmap
  • the associated STA list is used to indicate all STAs associated with the third AP
  • the third C-BF bitmap includes K bits, each bits correspond to a STA in the associated STA list of the third AP, for example, the first bit corresponds to the first STA in the associated STA list of the third AP, and the second bit corresponds to the first STA in the associated STA list of the third AP
  • the value of each bit is used to indicate whether the corresponding STA participates in C-BF, where K is the number of STAs associated with the third AP, and K is a positive integer.
  • the first response information may not include the associated STA list, but only need to include the third C-BF bitmap, as long as The first AP and the third AP only need to have the same understanding of the corresponding relationship between each bit in the third C-BF bitmap and the STA.
  • the first response information further includes third indication information, where the third indication information is used to indicate the coordinated transmission mode accepted by the third AP.
  • the third indication information is used to indicate whether to accept multi-AP cooperative transmission of C-BF.
  • the Sharing AP can send a cooperative transmission request frame to the Shared AP in broadcast or multicast mode, which is used to request the Shared AP to participate in the multi-AP cooperative transmission of the C-BF mode, or to ask the Shared AP whether to participate in the C-BF mode.
  • the Shared AP can synchronously reply the cooperative transmission response frame.
  • AP m when AP m participates in C-BF, it replies with a cooperative transmission response frame, indicating acceptance of the Sharing AP's request.
  • the AP m may also indicate the first-type STA set and/or the second-type STA set associated with the AP m in the coordinated transmission response frame.
  • AP n when AP n does not participate in C-BF, it replies with a cooperative transmission response frame, indicating that the request of Sharing AP is rejected.
  • the AP n may not indicate the first-type STA set and/or the second-type STA set associated with the AP n in the coordinated transmission response frame, because all STAs associated with the AP n do not participate in C-BF.
  • the Sharing AP may send a cooperative transmission notification frame to inform the Shared AP participating in the C-BF of the collected information about whether the Shared AP participates in the C-BF and/or whether the STA associated with the Shared AP participates in the C-BF.
  • the Shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the Sharing AP through an acknowledgment (Ack) frame, and the Shared AP can also not send an Ack frame, and accept the cooperative transmission notification frame sent by the Sharing AP by default.
  • Ack acknowledgment
  • the Sharing AP sends a cooperative transmission request frame to the Shared AP in unicast mode, which is used to request the Shared AP to participate in the multi-AP cooperative transmission of the C-BF mode, or to ask whether the Shared AP participates in the C-BF mode Multi-AP cooperative transmission, Shared AP can reply cooperative transmission response frame asynchronously.
  • AP m After Sharing AP sends a cooperative transmission request frame to AP m, AP m returns a cooperative transmission response frame to indicate acceptance of the Sharing AP's request while participating in C-BF.
  • the AP m may also indicate the first-type STA set and/or the second-type STA set associated with the AP m in the coordinated transmission response frame.
  • the Sharing AP sends a cooperative transmission request frame to AP n
  • AP n replies with a cooperative transmission response frame without participating in the C-BF, indicating that the request of the Sharing AP is rejected.
  • the AP n may not indicate the first-type STA set and/or the second-type STA set associated with the AP n in the coordinated transmission response frame, because all STAs associated with the AP n do not participate in C-BF.
  • the Sharing AP may send a cooperative transmission notification frame to inform the Shared AP participating in the C-BF of the collected information about whether the Shared AP participates in the C-BF and/or whether the STA associated with the Shared AP participates in the C-BF.
  • the Shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the Sharing AP through the Ack frame, and the Shared AP can also not send the Ack frame, and accept the cooperative transmission notification frame sent by the Sharing AP by default.
  • the frame format of the coordinated transmission response frame may be adaptively adjusted, which is not limited in this application.
  • FIG. 12 is a schematic diagram of a frame format of a cooperative transmission request frame provided by an embodiment of the present application, which may include the following fields (or fields) (field):
  • Frame Control occupies 2 bytes
  • length occupies 2 bytes
  • receiving address Receiving Address, RA
  • Send Address Transmission Address, TA
  • Coordinated TX Request variable number of bytes occupied
  • FCS FCS (4 bytes occupied).
  • the coordinated transmission request field includes at least one of the following fields:
  • the used coordinated transmission mode field (Coordinated TX Scheme Used field) is used to indicate the coordinated transmission mode used by the request, that is, to carry the aforementioned second indication information;
  • the C-BF command (C-BF Command) field is used to indicate the command used for multi-AP cooperative transmission in C-BF mode;
  • the C-OFDMA command (C-OFDMA Command) field is used to indicate the command used when the multi-AP cooperative transmission of the C-OFDMA mode is adopted;
  • the C-SR command (C-SR Command) field is used to indicate the command used for multi-AP cooperative transmission in C-SR mode;
  • J-TX command J-TX Command
  • J-TX Command J-TX Command
  • the C-UL MU MIMO command (C-UL MU-MIMO Command) field is used to indicate the command used for multi-AP cooperative transmission in C-UL MU MIMO mode.
  • the Coordinated TX Scheme Used field includes at least one of the following fields:
  • C-BF Used Use the C-BF (C-BF Used) field to indicate whether to request multi-AP cooperative transmission using C-BF mode
  • C-OFDMA C-OFDMA Used
  • C-SR Used Use the C-SR (C-SR Used) field to indicate whether to request multi-AP cooperative transmission using C-SR mode
  • J-TX Used Use the J-TX (J-TX Used) field to indicate whether to request multi-AP cooperative transmission using J-TX mode
  • C-UL MU-MIMO Used Use the C-UL MU MIMO (C-UL MU-MIMO Used) field to indicate whether to request multi-AP cooperative transmission using the C-UL MU MIMO mode.
  • the value of the C-BF Used field is 1, indicating that the Shared AP is requested to perform multi-AP cooperative transmission in the C-BF mode.
  • the cooperative transmission request frame includes the C-BF Command field; the C-BF Used field A value of 0 indicates that the Shared AP is not requested to perform multi-AP cooperative transmission in C-BF mode.
  • the cooperative transmission request frame does not include the C-BF Command field.
  • the value of the C-OFDMA Used field is 1 to indicate that the Shared AP is requested to perform multi-AP cooperative transmission in the C-OFDMA mode.
  • the cooperative transmission request frame includes the C-OFDMA Command field; the C-OFDMA Used field A value of 0 indicates that the Shared AP is not requested to perform multi-AP cooperative transmission in the C-OFDMA mode.
  • the cooperative transmission request frame does not include the C-OFDMA Command field.
  • the value of the C-SR Used field is 1, indicating that the Shared AP is requested to perform multi-AP cooperative transmission in the C-SR mode.
  • the cooperative transmission request frame includes the C-SR Command field; the C-SR Used field A value of 0 indicates that the Shared AP is not requested to perform multi-AP cooperative transmission in C-SR mode.
  • the cooperative transmission request frame does not include the C-SR Command field.
  • the value of the J-TX Used field is 1, indicating that the Shared AP is requested to perform multi-AP cooperative transmission in the J-TX mode.
  • the cooperative transmission request frame includes the J-TX Command field; the J-TX Used field A value of 0 indicates that the Shared AP is not requested to perform multi-AP cooperative transmission in J-TX mode.
  • the cooperative transmission request frame does not include the J-TX Command field.
  • the value of the C-UL MU-MIMO Used field is 1, indicating that the Shared AP is requested to perform multi-AP cooperative transmission in the C-UL MU-MIMO mode.
  • the cooperative transmission request frame includes C-UL MU-MIMO MIMO Command field;
  • C-UL MU-MIMO Used field value of 0 indicates that Shared AP is not requested to perform multi-AP cooperative transmission in C-UL MU-MIMO mode.
  • the cooperative transmission request frame does not include C-UL MU-MIMO Command field.
  • FIG. 13 to FIG. 15 are schematic diagrams of the frame format of the cooperative transmission response frame provided by the embodiment of the present application.
  • the coordinated transmission response frame may include the following fields (or in other words, fields) (field):
  • Frame Control occupies 2 bytes
  • length occupies 2 bytes
  • receiving address Receiving Address, RA
  • Send address Transmission Address, TA
  • Coordinated TX Responce variable bytes occupied
  • FCS 4 bytes occupied
  • the coordinated transmission response field includes at least one of the following fields:
  • Coordinated TX Scheme Accept field used to indicate whether the third AP accepts the requested coordinated transmission mode
  • C-BF Info.field used to indicate the information related to the third AP and C-BF
  • C-OFDMA Info.field used to indicate that the third AP is related to C-OFDMA
  • C-SR Info.field used to indicate the information related to the third AP and C-SR
  • J-TX Info.field used to indicate the information related to the J-TX of the third AP
  • the C-UL MU MIMO information field (C-UL MU-MIMO Info.field) is used to indicate information related to the C-UL MU MIMO of the third AP.
  • the accepted coordinated transmission mode field includes at least one of the following fields:
  • C-BF Accept the C-BF (C-BF Accept) field, which is used to indicate whether to accept the multi-AP cooperative transmission of the C-BF mode;
  • C-OFDMA Accept the C-OFDMA (C-OFDMA Accept) field, which is used to indicate whether to accept the multi-AP cooperative transmission of the C-OFDMA mode;
  • C-SR Accept the C-SR field, which is used to indicate whether to accept the multi-AP cooperative transmission of the C-SR mode
  • J-TX Accept the J-TX (J-TX Accept) field, which is used to indicate whether to accept the multi-AP cooperative transmission of J-TX mode;
  • C-UL MU-MIMO Accept the C-UL MU MIMO (C-UL MU-MIMO Accept) field, which is used to indicate whether to accept the coordinated transmission of the C-UL MU MIMO mode.
  • the value of the C-BF Accept field is 1 to indicate that the multi-AP cooperative transmission of the C-BF mode is accepted.
  • the cooperative transmission response frame includes the C-BF Info.field; the C-BF Accept field takes A value of 0 indicates that multi-AP cooperative transmission in C-BF mode is refused.
  • the cooperative transmission response frame does not include C-BF Info.field.
  • the value of the C-OFDMA Accept field is 1 to indicate that the multi-AP cooperative transmission of the C-OFDMA mode is accepted.
  • the cooperative transmission response frame includes the C-OFDMA Info.field; the C-OFDMA Accept field takes A value of 0 indicates that multi-AP cooperative transmission in C-OFDMA mode is refused.
  • the cooperative transmission response frame does not include C-OFDMA Info.field.
  • the value of the C-SR Accept field is 1 to indicate that multi-AP cooperative transmission in C-SR mode is accepted.
  • the cooperative transmission response frame includes C-SR Info.field; the C-SR Accept field takes A value of 0 indicates that multi-AP cooperative transmission in C-SR mode is refused.
  • the cooperative transmission response frame does not include C-SR Info.field.
  • the value of the J-TX Accept field is 1 to indicate that multi-AP cooperative transmission in J-TX mode is accepted.
  • the cooperative transmission response frame includes J-TX Info.field; the J-TX Accept field takes A value of 0 indicates that multi-AP cooperative transmission in J-TX mode is refused.
  • the cooperative transmission response frame does not include J-TX Info.field.
  • the value of the C-UL MU-MIMO Accept field is 1 to indicate that multi-AP cooperative transmission in C-UL MU-MIMO mode is accepted.
  • the cooperative transmission response frame includes C-UL MU-MIMO Info .field;
  • the value of the C-UL MU-MIMO Accept field is 0, indicating that multi-AP cooperative transmission in C-UL MU-MIMO mode is rejected.
  • the cooperative transmission response frame does not include C-UL MU-MIMO Info .field.
  • the C-BF information field includes at least one of the following fields:
  • An associated STA list field (Associated STA List subfield), used to indicate the STA list associated with the third AP;
  • the C-BF Bitmap of Associated STAs subfield (C-BF Bitmap of Associated STAs subfield) is used to indicate whether each STA in the STA list associated with the third AP participates in multi-AP coordinated transmission in C-BF mode. That is, the C-BF bitmap field of the associated STA is used to bear the aforementioned third C-BF bitmap.
  • the associated STA list field includes at least one of the following fields:
  • the Number of Associated STAs (Number of Associated STAs) field is used to indicate the number of STAs associated with the third AP;
  • At least one STA ID field is used to indicate the ID of the STA associated with the third AP, where the k th STA ID is used to indicate the ID of the kth STA associated with the third AP.
  • the C-BF bitmap field of the associated STA is used to indicate whether the STA in the STA list associated with the third AP participates in C-BF.
  • the C-BF bitmap field of the associated STA may include k STA Bitmaps, and each STA Bitmap corresponds to a STA associated with the third AP, for example, the 1st STA Bitmap corresponds to the 1st STA associated with the third AP, and the k th STA The Bitmap corresponds to the k th STA associated with the third AP, and the STA Bitmap corresponding to each STA is used to indicate whether the STA participates in C-BF. As an example, if a certain STA participates in C-BF, the STA Bitmap corresponding to the STA is set to 1, otherwise it is set to 0.
  • FIG. 15 only uses a bitmap to indicate the participation of the STA associated with the third AP in the C-BF as an example. In other embodiments, it may also directly indicate the STA associated with the third AP participating in the C-BF, or STAs that do not participate in C-BF.
  • the C-BF information field includes a STA list field participating in C-BF, which is used to indicate STAs associated with the third AP that participate in multi-AP coordinated transmission in the C-BF mode.
  • the C-BF information field includes a STA list field that does not participate in C-BF, which is used to indicate STAs associated with the third AP that do not participate in multi-AP coordinated transmission in the C-BF mode.
  • the method 200 further includes:
  • the second AP determines target channel state information in prestored channel state information according to the first information
  • the second AP removes the following channel state information from the pre-stored channel state information according to the first information, to obtain the target channel state information:
  • the second AP uses the steering matrix to send data to the STA associated with the second AP participating in the C-BF multi-AP cooperative transmission, which is beneficial to ensure that the second AP sends useful signals to the target STA, and the Null is sent to OBSS STA to achieve effective interference suppression and improve the SINR of the communication link.
  • AP1 is the MAP
  • AP m and AP n are SAPs in the multi-AP cooperative set.
  • STA 1- i is associated with AP 1
  • STA m-i is associated with AP m
  • STA n-i is associated with AP n, where i represents the i-th STA associated with AP.
  • the APs (including MAP and SAP) in the multi-AP cooperative set perform sequential channel detection, and each AP obtains and stores the channel state information between it and each STA (including associated STA and OBSS STA).
  • STA including associated STA and OBSS STA.
  • the channel state information stored by the APs in the multi-AP cooperative set can be shown in Table 1.
  • AP 1 can store a row of channel state information corresponding to AP 1
  • AP m can store AP m
  • a line of channel state information corresponding to AP n can store a line of channel state information corresponding to AP n.
  • Table 1 Channel state information obtained by each AP through channel detection
  • H(1,1-i) represents the channel state information between AP 1 and STA 1-i
  • H(m,1-i) represents the channel state information between AP m and STA 1-i
  • H( n,1-i) indicates the channel state information between AP n and STA 1-i, and the meanings of other channel state information are similar, and will not be repeated here.
  • the Sharing AP sends a cooperative transmission request frame, carrying the aforementioned first request information, for example, it can be sent by broadcast or multicast, or it can also be sent by unicast.
  • the Shared AP replies with a coordinated transmission response frame, carrying the aforementioned first response information, for example, the Shared AP synchronously or asynchronously replies with a coordinated transmission response frame.
  • FIG. 16 is only an example in which the Sharing AP sends a coordinated transmission request frame through broadcast or multicast, and the Shared AP synchronously sends a coordinated transmission response frame, but the present application is not limited thereto.
  • the Sharing AP can determine the participation of the APs in the multi-AP cooperative transmission set for C-BF and/or the participation of the STAs associated with the APs in the multi-AP cooperative transmission set for C-BF .
  • the Sharing AP can obtain the first information according to the cooperative transmission response frame replied by the Shared AP.
  • the Sharing AP sends a coordinated transmission notification frame to the Shared AP, for example, the Sharing AP only sends a coordinated transmission notification frame to the Shared AP participating in the C-BF, where the coordinated transmission notification frame carries the first information.
  • the Sharing AP informs the Shared AP participating in the C-BF which APs and which associated STAs participate in the C-BF and/or which APs and their associated STAs do not participate in the C-BF in the coordinated transmission notification frame.
  • the first information may be used to indicate the following participation information:
  • AP n does not participate in C-BF, which means that all STAs associated with AP n do not participate in C-BF;
  • the Shared APs participating in the C-BF (such as AP 1 and AP m) determine the target channel state information for calculating the steering matrix in the stored channel state information according to the first information.
  • AP 1 and AP m remove the following channel state information in Table 1 to obtain the target channel state information:
  • AP 1 removes other channel state information other than H(1,1-i) and H(1,m-i) in Table 1;
  • AP m eliminates other channel state information other than H(m,1-i) and H(m,m-i) in Table 1.
  • AP 1 removes the channel state information (ie H(1,n-i)) of the STA associated with AP n in Table 1;
  • AP m removes the channel state information (ie H(m,n-i)) of STAs associated with AP n in Table 1.
  • the Shared AP participating in the C-BF calculates the C-BF steering matrix for the Shared AP to perform multi-AP cooperative transmission according to the target channel state information.
  • AP 1 and AP m calculate the steering matrix according to the target channel state information after removing the relevant channel state information in Table 1.
  • AP 1 calculates the C-BF steering matrix used by AP 1 based on channel state information (H(1,1-i) and H(1,m-i)), and AP m calculates the C-BF steering matrix used by AP 1 based on channel state information (H(m,1 -i) and H(m,m-i)), calculate the C-BF steering matrix used by AP m.
  • the principle of calculating the C-BF steering matrix is to enhance the signal quality (such as SINR) of the STAs participating in the C-BF associated with the AP, and the non-associated STAs participating in the C-BF (that is, the STAs participating in the C-BF under other APs)
  • the signal quality of the STA) is weakened (that is, the null trap of the transmitted signal is aligned with the non-associated STA participating in the C-BF), so as to achieve effective interference suppression and improve the SINR of the communication link.
  • the pre-stored channel The state information cannot accurately reflect the channel state information between each AP and each STA.
  • the cooperative transmission based on the steering matrix calculated by the channel state information obtained before the wireless communication environment changes may make the performance of C-BF poor.
  • the Sharing AP sends a coordinated transmission trigger frame (Coordinated TX Trigger), which is used to trigger the APs participating in C-BF to perform multi-AP coordinated transmission.
  • a coordinated transmission trigger frame Coordinatd TX Trigger
  • the Shared AP participating in C-BF sends data according to the steering matrix calculated according to the target channel state information.
  • the Sharing AP also participates in C-BF, then the Sharing AP also sends data with other Shared APs participating in C-BF according to the steering matrix calculated in advance.
  • Each STA replies with a block acknowledgment (Block Acknowledgment, BA) frame after receiving the data.
  • Block Acknowledgment, BA Block Acknowledgment
  • FIG. 16 only uses the same AP as an example for the MAP and the Sharing AP.
  • the MAP and the Sharing AP may also be different APs, which is not limited in this application.
  • the Sharing AP may also notify the APs participating in the C-BF of the first information during the coordinated transmission phase. In this case, during the preparation phase, the Sharing AP may not send a coordinated transmission notification frame.
  • the coordinated transmission trigger frame carries the first information, and further, the Shared APs participating in the C-BF can calculate the steering matrix in the foregoing manner according to the first information. This method can be applied to Shared APs with strong processing capabilities.
  • the steering matrix can be calculated according to the aforementioned method according to the first information in a very short time (such as SIFS, PIFS, or DIFS, etc.). Then the Sharing AP may not send a cooperative transmission notification frame to inform the Shared APs participating in the C-BF of the first information during the Preparation phase, but notify each Shared AP participating in the C-BF of the first information through a cooperative transmission trigger frame during the cooperative transmission phase.
  • One message, and then each Shared AP participating in C-BF calculates the steering matrix according to the above-mentioned method according to the first information, and sends Data according to the steering matrix. That is, the steps of coordinated transmission notification and response (optional) in FIG. 16 are omitted.
  • the Sharing AP directly uses the coordinated transmission trigger frame to realize the function of the coordinated transmission notification frame.
  • the frame format design of the coordinated transmission trigger frame refers to the frame format design of the coordinated transmission notification frame shown in FIG. 7 to FIG. 9 , which will not be repeated here.
  • Figure 17 the difference between Figure 17 and Figure 18 is that in the preparation phase in Figure 17, the Shared AP synchronously replies to the Sharing Ap's cooperative transmission request, and in the preparation phase in Figure 18, the Shared AP asynchronously replies to the Sharing Ap's cooperative transmission request.
  • the Sharing AP can collect the participation status of the Shared AP and its associated STAs in the multi-AP cooperative set for the C-BF multi-AP cooperative transmission, and further notify the participating C-BF of the participation status.
  • the AP of multi-AP cooperative transmission of BF so that the AP can determine the target channel state information used to calculate the steering matrix in the pre-stored channel state information according to the participation situation, and calculate the steering matrix based on the target channel state information.
  • the AP When calculating the steering matrix, only the AP and the STA participating in C-BF are considered, so that the AP can send the useful signal to the target STA, and send the null signal to the OBSS STA, which reduces interference and improves transmission performance.
  • the AP only needs to eliminate the pre-stored channel state information according to the first information to obtain the target channel state information for calculating the steering matrix. It is necessary to exchange channel state information between APs, so that the steering matrix calculation of C-BF can be realized with low signaling overhead.
  • FIG. 19 shows a schematic block diagram of a first access point AP 400 according to an embodiment of the present application.
  • the first AP 400 includes:
  • a communication unit 410 configured to send first information to at least one second AP, where the first information is used to indicate the participation of APs in the multi-AP cooperative set for multi-AP cooperative transmission in the cooperative beamforming C-BF mode and /or the participation of the station STA associated with the AP in the multi-AP cooperative set for the multi-AP cooperative transmission in the C-BF mode, the first AP and the at least one second AP belong to the multi-AP cooperative set.
  • the first information is used to indicate at least one of the following:
  • At least one AP where the at least one AP includes APs participating in multi-AP coordinated transmission in C-BF mode in the multi-AP cooperation set, and/or, multi-APs in the multi-AP cooperation set that do not participate in C-BF mode APs for cooperative transmission;
  • each STA set corresponds to an AP participating in the multi-AP coordinated transmission in the C-BF mode
  • the STA set includes STAs participating in the multi-AP coordinated transmission in the C-BF mode among the STAs associated with the corresponding AP, and /or, among the STAs associated with the corresponding AP, the STAs that do not participate in the multi-AP coordinated transmission in the C-BF mode.
  • the at least one STA set is indicated by a bitmap.
  • the first information includes:
  • each associated STA list corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode, and each associated STA list is used to indicate the STA associated with the corresponding AP;
  • each C-BF bitmap corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode
  • each C-BF bitmap is used to indicate that the STA list associated with the corresponding AP participates in C - STAs of multi-AP cooperative transmission in BF mode or STAs not participating in multi-AP cooperative transmission in C-BF mode.
  • the first information includes at least one STA list participating in C-BF, and each STA list participating in C-BF corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode, and the participating C-BF -
  • the BF STA list is used to indicate the STAs associated with the corresponding AP that participate in multi-AP coordinated transmission in the C-BF mode.
  • the first information further includes first indication information, and the first indication information is used to indicate that multi-AP cooperative transmission in C-BF mode is adopted.
  • the first information is carried in a first frame, and the first frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the first information.
  • the coordinated transmission notification field includes at least one of the following fields:
  • the adopted coordinated transmission mode field is used to indicate the mode adopted for performing multi-AP coordinated transmission
  • the C-BF parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-BF mode
  • the Coordinated Orthogonal Frequency Division Multiple Access C-OFDMA parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-OFDMA mode;
  • Coordinated spatial multiplexing C-SR parameter field which is used to indicate the parameters used for multi-AP cooperative transmission in C-SR mode
  • the joint transmission J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the Coordinated Uplink Multi-User Multiple-Input Multiple-Output C-UL MU MIMO parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-UL MU MIMO mode.
  • the C-BF parameter field includes at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP identification ID field used to indicate the AP that participates in the multi-AP coordinated transmission of the C-BF mode and/or the AP that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • each associated STA list field corresponds to an AP indicated by the at least one AP ID field, and the associated STA list field is used to indicate the STA list associated with the corresponding AP;
  • each C-BF bitmap field corresponds to an AP indicated by the at least one AP ID field
  • the C-BF bitmap field is used to indicate the STA list associated with the corresponding AP Indicates whether the STA participates in multi-AP cooperative transmission in C-BF mode.
  • the C-BF parameter field includes at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP ID field used to indicate at least one AP participating in multi-AP cooperative transmission of C-BF mode
  • each STA list field participating in C-BF corresponds to an AP indicated by the at least one AP ID field, and the STA list field participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in multi-AP cooperative transmission in C-BF mode.
  • the adopted coordinated transmission mode field includes at least one of the following fields:
  • the C-BF field is used to indicate whether to use the C-BF mode for multi-AP cooperative transmission
  • the C-OFDMA field is used to indicate whether to use multi-AP cooperative transmission in C-OFDMA mode
  • the C-SR field is used to indicate whether to use the C-SR mode for multi-AP cooperative transmission
  • the J-TX field is used to indicate whether to use J-TX mode for multi-AP cooperative transmission
  • the C-UL MU MIMO field is used to indicate whether to use multi-AP cooperative transmission in C-UL MU MIMO mode.
  • the first frame is also used to trigger APs participating in the multi-AP coordinated transmission in the C-BF mode to perform the multi-AP coordinated transmission in the C-BF mode.
  • the communication unit 410 is also used for:
  • the at least one third AP includes the at least one second AP.
  • the first request information includes second indication information, where the second indication information is used to indicate the coordinated transmission mode that the first AP requests to participate in.
  • the first request information is carried in a second frame, and the second frame includes a coordinated transmission request field, and the coordinated transmission request field is used to carry the first request information.
  • the coordinated transmission request field includes at least one of the following fields:
  • Coordinated transmission mode used field which is used to indicate the coordinated transmission mode used by the request
  • the C-BF command field is used to indicate the command used for multi-AP cooperative transmission in C-BF mode
  • the C-OFDMA command field is used to indicate the command used for multi-AP cooperative transmission in C-OFDMA mode
  • the C-SR command field is used to indicate the command used for multi-AP cooperative transmission in C-SR mode
  • the J-TX command field is used to indicate the command used for multi-AP cooperative transmission in J-TX mode
  • the C-UL MU MIMO command field is used to indicate the command used for multi-AP cooperative transmission in C-UL MU MIMO mode.
  • the used coordinated transmission mode field includes at least one of the following fields:
  • J-TX field Use the J-TX field to indicate whether to request multi-AP cooperative transmission using J-TX mode
  • the communication unit 410 is specifically used for:
  • the communication unit 410 is also used for:
  • first response information sent by each third AP in the at least one third AP, where the first response information is used to indicate whether the third AP participates in multi-AP coordinated transmission in C-BF mode and/or Whether the STA associated with the third AP participates in multi-AP coordinated transmission in the C-BF mode.
  • the communication unit 410 is specifically used for:
  • the first response information includes an associated STA list and a C-BF bitmap
  • the associated STA list is a list of STAs associated with the third AP
  • the C-BF bitmap is used to indicate the Whether each STA in the STA list associated with the third AP participates in multi-AP coordinated transmission in the C-BF mode.
  • the first response information includes a list of STAs participating in C-BF, and the list of STAs participating in C-BF is the STA associated with the third AP participating in multi-AP coordinated transmission in C-BF mode list.
  • the first response information further includes third indication information, where the third indication information is used to indicate the coordinated transmission mode accepted by the third AP.
  • the first response information is carried in a third frame, and the third frame includes a coordinated transmission response field, and the coordinated transmission response field is used to carry the first response information.
  • the coordinated transmission response field includes at least one of the following fields:
  • the accepted coordinated transmission mode field is used to indicate whether the third AP receives the requested coordinated transmission mode
  • the C-BF information field is used to indicate information related to the third AP and C-BF;
  • C-OFDMA information field used to indicate the information related to C-OFDMA of the third AP
  • the C-SR information field is used to indicate information related to the third AP and the C-SR;
  • J-TX information field used to indicate the information related to J-TX of the third AP
  • the C-UL MU MIMO information field is used to indicate information related to the third AP and C-UL MU MIMO.
  • the C-BF information field includes at least one of the following fields:
  • the associated STA list field is used to indicate the STA list associated with the third AP
  • the C-BF bitmap field of associated STAs is used to indicate whether each STA in the STA list associated with the third AP participates in multi-AP coordinated transmission in C-BF mode.
  • the C-BF information field includes a STA list field participating in C-BF, which is used to indicate STAs associated with the third AP that participate in multi-AP coordinated transmission in C-BF mode.
  • the accepted coordinated transmission mode field includes at least one of the following fields:
  • Accept the C-UL MU MIMO field which is used to indicate whether to accept the coordinated transmission of the C-UL MU MIMO mode.
  • the at least one second AP is an AP participating in multi-AP cooperative transmission in the C-BF mode in the multi-AP cooperative set.
  • the first AP is a shared AP
  • the at least one second AP is a shared AP
  • the first AP is a primary AP
  • the at least one second AP is a secondary AP
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system on chip.
  • the aforementioned processing unit may be one or more processors.
  • first AP 400 may correspond to the first AP or Sharing AP in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the first AP 400 are respectively for To realize the corresponding flow of the first AP or the Sharing AP in the method 200 shown in FIGS.
  • Fig. 20 is a schematic block diagram of a second access point AP according to an embodiment of the present application.
  • the second AP 500 of FIG. 5 includes:
  • the communication unit 510 is configured to receive the first information sent by the first AP, the first information is used to indicate the participation of the APs in the multi-AP cooperative set for the multi-AP cooperative transmission of the cooperative beamforming C-BF mode and/or Or the participation of the station STA associated with the AP in the multi-AP cooperative set for the multi-AP cooperative transmission in the C-BF mode, the first AP and the second AP belong to the multi-AP cooperative set.
  • the first information is used to indicate at least one of the following:
  • At least one AP where the at least one AP includes APs participating in multi-AP coordinated transmission in C-BF mode in the multi-AP cooperation set, and/or, multi-APs in the multi-AP cooperation set that do not participate in C-BF mode Cooperative transmission AP;
  • each STA set corresponds to an AP participating in the multi-AP coordinated transmission in the C-BF mode
  • the STA set includes STAs participating in the multi-AP coordinated transmission in the C-BF mode among the STAs associated with the corresponding AP, and /or, among the STAs associated with the corresponding AP, the STAs that do not participate in the multi-AP coordinated transmission in the C-BF mode.
  • the at least one STA set is indicated by a bitmap.
  • the first information includes:
  • each associated STA list corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode, and each associated STA list is used to indicate the STA associated with the corresponding AP;
  • each C-BF bitmap corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode
  • each C-BF bitmap is used to indicate that the STA list associated with the corresponding AP participates in C - STAs of multi-AP cooperative transmission in BF mode or STAs not participating in multi-AP cooperative transmission in C-BF mode.
  • the first information includes at least one STA list participating in C-BF, and each STA list participating in C-BF corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode, and the participating C-BF -
  • the BF STA list is used to indicate the STAs associated with the corresponding AP that participate in multi-AP coordinated transmission in the C-BF mode.
  • the first information further includes first indication information, and the first indication information is used to indicate that multi-AP cooperative transmission in C-BF mode is adopted.
  • the first information is carried in a first frame, and the first frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the first information.
  • the coordinated transmission notification field includes at least one of the following fields:
  • the adopted coordinated transmission mode field is used to indicate the mode adopted for performing multi-AP coordinated transmission
  • the C-BF parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-BF mode
  • the Coordinated Orthogonal Frequency Division Multiple Access C-OFDMA parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-OFDMA mode;
  • Coordinated spatial multiplexing C-SR parameter field which is used to indicate the parameters used for multi-AP cooperative transmission in C-SR mode
  • the joint transmission J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the Coordinated Uplink Multi-User Multiple-Input Multiple-Output C-UL MU MIMO parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-UL MU MIMO mode.
  • the C-BF parameter field includes at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP identification ID field used to indicate the AP that participates in the multi-AP coordinated transmission of the C-BF mode and/or the AP that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • each associated STA list field corresponds to an AP indicated by the at least one AP ID field, and the associated STA list field is used to indicate the STA list associated with the corresponding AP;
  • each C-BF bitmap field corresponds to an AP indicated by the at least one AP ID field
  • the C-BF bitmap field is used to indicate the STA list associated with the corresponding AP Indicates whether the STA participates in multi-AP cooperative transmission in C-BF mode.
  • the C-BF parameter field includes at least one of the following fields:
  • AP number field used to indicate the number of APs included in the first frame
  • At least one AP ID field used to indicate at least one AP participating in multi-AP cooperative transmission of C-BF mode
  • each STA list field participating in C-BF corresponds to an AP indicated by the at least one AP ID field, and the STA list field participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in multi-AP cooperative transmission in C-BF mode.
  • the adopted coordinated transmission mode field includes at least one of the following fields:
  • the C-BF field is used to indicate whether to use the C-BF mode for multi-AP cooperative transmission
  • the C-OFDMA field is used to indicate whether to use multi-AP cooperative transmission in C-OFDMA mode
  • the C-SR field is used to indicate whether to use the C-SR mode for multi-AP cooperative transmission
  • the J-TX field is used to indicate whether to use J-TX mode for multi-AP cooperative transmission
  • the C-UL MU MIMO field is used to indicate whether to use multi-AP cooperative transmission in C-UL MU MIMO mode.
  • the first frame is also used to trigger APs participating in the multi-AP coordinated transmission in the C-BF mode to perform the multi-AP coordinated transmission in the C-BF mode.
  • the communication unit 510 is also used for:
  • the first request information includes second indication information, where the second indication information is used to indicate the coordinated transmission mode that the first AP requests to participate in.
  • the first request information is carried in a second frame, and the second frame includes a coordinated transmission request field, and the coordinated transmission request field is used to carry the first request information.
  • the coordinated transmission request field includes at least one of the following fields:
  • Coordinated transmission mode used field which is used to indicate the coordinated transmission mode used by the request
  • the C-BF command field is used to indicate the command used for multi-AP cooperative transmission in C-BF mode
  • the C-UL MU MIMO command field is used to indicate the command used for multi-AP cooperative transmission in C-UL MU MIMO mode.
  • the used coordinated transmission mode field includes at least one of the following fields:
  • J-TX field Use the J-TX field to indicate whether to request multi-AP cooperative transmission using J-TX mode
  • the communication unit 510 is specifically used for:
  • the communication unit 510 is also used for:
  • first response information is used to indicate whether the second AP participates in multi-AP coordinated transmission in C-BF mode and/or whether the STA associated with the second AP participates in Multi-AP cooperative transmission in C-BF mode.
  • the first response information includes an associated STA list and a C-BF bitmap
  • the associated STA list is a list of STAs associated with the second AP
  • the C-BF bitmap is used to indicate the Whether each STA in the STA list associated with the second AP participates in multi-AP coordinated transmission in the C-BF mode.
  • the first response information includes a list of STAs participating in C-BF, and the list of STAs participating in C-BF is the STA associated with the second AP participating in multi-AP coordinated transmission in C-BF mode list.
  • the first response information further includes third indication information, where the third indication information is used to indicate the coordinated transmission mode accepted by the second AP.
  • the first response information is carried in a third frame, and the third frame includes a coordinated transmission response field, and the coordinated transmission response field is used to carry the first response information.
  • the coordinated transmission response field includes at least one of the following fields:
  • the accepted coordinated transmission mode field is used to indicate the coordinated transmission mode accepted by the second AP;
  • the C-BF information field is used to indicate information related to the second AP and C-BF;
  • C-OFDMA information field used to indicate the information related to C-OFDMA of the second AP
  • the C-SR information field is used to indicate information related to the second AP and the C-SR;
  • J-TX information field used to indicate the information related to J-TX of the second AP
  • the C-UL MU MIMO information field is used to indicate information related to the second AP and C-UL MU MIMO.
  • the C-BF information field includes at least one of the following fields:
  • the associated STA list field is used to indicate the STA list associated with the second AP
  • the C-BF bitmap field of the associated STA is used to indicate whether each STA in the STA list associated with the second AP participates in multi-AP coordinated transmission in the C-BF mode.
  • the C-BF information field includes a STA list field participating in C-BF, which is used to indicate STAs associated with the second AP that participate in multi-AP coordinated transmission in C-BF mode.
  • the accepted coordinated transmission mode field includes at least one of the following fields:
  • Accept the C-UL MU MIMO field which is used to indicate whether to accept the coordinated transmission of the C-UL MU MIMO mode.
  • the second access point further includes:
  • a processing unit configured to determine target channel state information in prestored channel state information according to the first information
  • a steering matrix for multi-AP cooperative transmission in C-BF mode is calculated.
  • the processing unit is specifically used for:
  • the second-type STAs are STAs that do not participate in the C-BF multi-AP coordinated transmission
  • the second-type APs are APs that do not participate in the C-BF multi-AP coordinated transmission.
  • the communication unit 510 is also used for:
  • the pre-stored channel state information is obtained by the second AP in a channel detection phase.
  • the second AP is an AP participating in multi-AP cooperative transmission in the C-BF mode in the multi-AP cooperative set.
  • the first AP is a shared AP
  • the second AP is a shared AP
  • the first AP is a primary AP
  • the second AP is a secondary AP
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system on chip.
  • the aforementioned processing unit may be one or more processors.
  • the second AP 500 may correspond to the second AP or Shared AP in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the second AP 500 are respectively for To realize the corresponding flow of the second AP or Shared AP in the method 200 shown in FIG. 6 to FIG. 18 , for the sake of brevity, details are not repeated here.
  • FIG. 21 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in FIG. 21 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620 .
  • the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application.
  • the memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the communication device 600 may specifically be the first AP or the Sharing AP of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the first AP or the Sharing AP in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • the communication device 600 may specifically be the second AP or the Shared AP of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the second AP or the Shared AP in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • FIG. 22 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 22 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720 .
  • the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application.
  • the memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .
  • the chip 700 may also include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, specifically, may obtain information or data sent by other devices or chips.
  • the chip 700 may also include an output interface 740 .
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the first AP or Sharing AP in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the first AP or Sharing AP in the various methods of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the first AP or Sharing AP in the various methods of the embodiments of the present application.
  • the chip can be applied to the second AP or Shared AP in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the second AP or Shared AP in the methods of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the second AP or Shared AP in the methods of the embodiments of the present application.
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 23 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 23 , the communication system 900 includes a first access point 910 and a second access point 920 .
  • the first access point 910 can be used to implement the corresponding functions implemented by the first AP or Sharing AP in the above method
  • the second access point 920 can be used to implement the corresponding functions implemented by the second AP or Shared AP in the above method.
  • the corresponding functions implemented by the AP are not repeated here.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the first AP or the Sharing AP in the embodiments of the present application, and the computer program enables the computer to execute the methods implemented by the first AP or the Sharing AP in the various methods of the embodiments of the present application.
  • the corresponding process is not repeated here.
  • the computer-readable storage medium can be applied to the second AP or the Shared AP in the embodiments of the present application, and the computer program enables the computer to execute the method implemented by the second AP or the Shared AP in each method of the embodiments of the present application.
  • the corresponding process is not repeated here.
  • the embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the first AP or the Sharing AP in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding functions implemented by the first AP or the Sharing AP in the methods of the embodiments of the present application.
  • the process will not be repeated here.
  • the computer program product can be applied to the second AP or the Shared AP in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding functions implemented by the second AP or the Shared AP in the methods of the embodiments of the present application.
  • the process will not be repeated here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the first AP or Sharing AP in the embodiment of the present application.
  • the computer program executes each method in the embodiment of the present application by the first AP or Sharing AP.
  • the corresponding process of AP implementation is not repeated here.
  • the computer program can be applied to the second AP or the Shared AP in the embodiment of the present application.
  • the computer program executes each method in the embodiment of the present application by the second AP or the Shared AP.
  • the corresponding process of AP implementation is not repeated here.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, 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 units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. 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 functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Abstract

一种无线通信的方法和设备，该方法包括：第一接入点AP向至少一个第二AP发送第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。

Description

无线通信的方法和设备 技术领域
本申请实施例涉及通信领域，具体涉及一种无线通信的方法和设备。
背景技术
在一些场景中，引入了协作波束赋形(Coordinated Beamforming，C-BF)模式的多接入点(Access Point，AP)协作传输技术，C-BF是多个AP通过波束赋形的方法将有用信号发送给或对准目标站点(STATION，STA)，同时将零陷(Null)发送给或对准重叠的基本服务集(Overlapping Basic Service Set，OBSS)的STA以实现干扰抑制，提升通信链路的信干噪比(Signal to Interference plus Noise Ratio，SINR)，从而提升吞吐量降低通信时延。因此，如何计算用于C-BF的转向矩阵(steering matrix)以实现有效的干扰抑制是一项亟需解决的问题。
发明内容
本申请提供了一种无线通信的方法和设备，有利于实现有效的干扰抑制，提升通信链路的SINR。
第一方面，提供了一种无线通信的方法，包括：第一接入点AP向至少一个第二AP发送第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。
第二方面，提供了一种无线通信的方法，包括：第二接入点AP接收第一AP发送的第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述第二AP属于所述多AP协作集合。
第三方面，提供了一种接入点，用于执行上述第一方面或其各实现方式中的方法。
具体地，该接入点包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面，提供了一种接入点，用于执行上述第二方面或其各实现方式中的方法。
具体地，该接入点包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面，提供了一种接入点，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种接入点，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第二方面或其各实现方式中的方法。
第七方面，提供了一种芯片，用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该装置的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面，提供了一种计算机程序产品，包括计算机程序指令，所述计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案，第一AP可以收集多AP协作集合中的AP及其关联的STA对于C-BF的多AP协作传输的参与情况，进一步将该参与情况通知给参与C-BF的多AP协作传输的AP，从而参与C-BF的多AP协作传输的AP可以根据该参与情况在预存的信道状态信息中确定用于计算转向矩阵的目标信道状态信息，基于该目标信道状态信息计算转向矩阵，进一步基于该转向矩阵执行C-BF模式的多AP协作传输，有利于实现将有用信号发送给目标STA，将零陷(Null)发送给OBSS STA，实现有效的干扰抑制，提升通信链路的SINR。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是根据本申请实施例适用的一种有线的多AP协作架构的示意性图。
图3是根据本申请实施例适用的一种无线的多AP协作架构的示意性图。
图4是根据本申请实施例提供的一种C-BF的示意性图。
图5是根据本申请实施例提供的一种C-BF的信道探测流程图。
图6是本申请实施例提供的一种无线通信的方法的示意性交互图。
图7是本申请实施例提供的一种协作传输通知帧的帧格式示意图。
图8是图7所示协作传输通知帧中的采用的协作传输模式字段的示意性格式图。
图9是图7所示协作传输通知帧中的C-BF参数字段的示意性格式图。
图10是本申请实施例提供的一种准备阶段的示意性交互图。
图11是本申请实施例提供的另一种准备阶段的示意性交互图。
图12是本申请实施例提供的一种协作传输请求帧的帧格式示意图。
图13是本申请实施例提供的一种协作传输响应帧的帧格式示意图。
图14是图13所示协作传输响应帧中的接受的协作传输模式字段的示意性格式图。
图15是图13所示协作传输响应帧中的C-BF信息字段的示意性格式图。
图16是根据本申请一个实施例的多AP协作传输流程的示意性交互图。
图17是本申请实施例提供的一种通过协作传输触发帧携带第一信息的示意性交互图。
图18是本申请实施例提供的另一种通过协作传输触发帧携带第一信息的示意性交互图。
图19是本申请实施例提供的一种接入点的示意性框图。
图20是本申请实施例提供的另一种接入点的示意性框图。
图21是本申请实施例提供的一种通信设备的示意性框图。
图22是本申请实施例提供的一种芯片的示意性框图。
图23是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)或其他通信系统等。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括接入点(Access Point，AP)110，以及通过接入点110接入网络的站点(STATION，STA)120。
在一些场景中，AP或称AP STA，即在某种意义上来说，AP也是一种STA。
在一些场景中，STA或称非AP STA(non-AP STA)。
通信系统100中的通信可以是AP与non-AP STA之间的通信，也可以是non-AP STA与non-AP STA之间的通信，或者STA和peer STA之间的通信，其中，peer STA可以指与STA对等通信的设备，例如，peer STA可能为AP，也可能为non-AP STA。
AP相当于一个连接有线网和无线网的桥梁，主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。AP设备可以是带有WiFi芯片的终端设备(如手机)或者网络设备(如路由器)。
应理解，STA在通信系统中的角色不是绝对的，例如，在一些场景中，手机连接路由的时候，手机是non-AP STA，手机作为其他手机的热点的情况下，手机充当了AP的角色。
AP和non-AP STA可以是应用于车联网中的设备，物联网(Internet Of Things，IoT)中的物联网节点、传感器等，智慧家居中的智能摄像头，智能遥控器，智能水表电表等，以及智慧城市中的传感器等。
在一些实施例中，non-AP STA可以支持802.11be制式。non-AP STA也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种当前以及未来的802.11家族的无线局域网(wireless local area networks，WLAN)制式。
在一些实施例中，AP可以为支持802.11be制式的设备。AP也可以为支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种当前以及未来的802.11家族的WLAN制式的设备。
在本申请实施例中，STA可以是支持WLAN或WiFi技术的手机(Mobile Phone)、平板电脑(Pad)、电脑、虚拟现实(Virtual Reality，VR)设备、增强现实(Augmented Reality，AR)设备、工业控制(industrial control)中的无线设备、机顶盒、无人驾驶(self driving)中的无线设备、车载通信设备、远程医疗(remote medical)中的无线设备、智能电网(smart grid)中的无线设备、运输安全(transportation safety)中的无线设备、智慧城市(smart city)中的无线设备或智慧家庭(smart home)中的无线设备、无线通信芯片/ASIC/SOC/等。
WLAN技术可支持频段可以包括但不限于：低频段(例如2.4GHz、5GHz、6GHz)、高频段(例如60GHz)。
图1示例性地示出了一个AP STA和两个non-AP STA，可选地，该通信系统100可以包括多个AP STA以及包括其它数量的non-AP STA，本申请实施例对此不做限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的接入点110和站点120，接入点110和站点120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、网关等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种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：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
本申请实施例中，"预定义"可以通过在设备(例如，包括接入点和站点)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中，所述“协议”可以指通信领域的标准协议，例如可以包括WiFi协议以及应用于未来的WiFi通信系统中的相关协议，本申请对此不做限定。
为便于理解本申请实施例的技术方案，以下对本申请相关的多AP协作集合的建立进行说明。
多AP协作集合的建立包括以下两个阶段：多AP协作能力发现阶段和多AP协作集合建立阶段。
在多AP协作能力发现阶段，AP可以通过接收邻居AP发送的信标(Beacon)帧或其它管理帧来发现彼此的多AP协作能力。
在多AP协作集合建立阶段，发起多AP协作传输的AP称为主AP(Master AP，MAP)，MAP选择其周围的辅AP(Slave AP，SAP)(一个或多个SAP)来参加多AP协作传输。在这个过程中，MAP和SAP之间会交互一些用于配置多AP协作集合的信息，具体步骤和交互的信息如下：
1)MAP向SAPs发送请求(Request)帧，主要包括以下信息：分配SAP在多AP协作传输时的标识(identity，ID)，分配多AP协作集合的ID；
2)SAP向MAP回复响应(Response)帧，主要包括以下信息：SAP所关联的STA的信息，包括STA的ID以及参与多AP协作传输的能力信息；STA参与多AP协作传输的优先级。
参与多AP协作传输的AP可包括如下角色(role)：
MAP(Master AP)、SAP(Slave AP)、协作AP(Coordinating AP)、被协作AP(Coordinated AP)、共享AP(Sharing AP)和被共享AP(Shared AP)。
其中，在多AP协作集合建立阶段，由MAP角色的AP向SAP角色的AP发起多AP协作集合建立的请求；在信道探测阶段，由该协作AP角色的协作AP发起信道探测(channel sounding)，该被协作AP角色的AP参与信道探测；在准备(preparation)阶段和/或协作传输(Coordinated Transmission)阶段，该共享AP角色的AP共享其传输机会(transmission opportunity，TXOP)资源给该被共享AP角色的AP进行协作传输。
在一些实施例中，本申请可以应用于如图2所示的有线多AP协作传输架构，也可以应用于如图3所示的无线多AP协作传输架构。
在有线多AP协作传输架构中，如图2中的(a)所示，网络中的协作者(Coordinator)处于某个AP中，通过有线连接控制其它AP；如图2中的(b)所示，网络中存在一个独立的协作者(Coordinator)，通过有线连接控制其它AP。对于有线多AP协作传输架构，多AP协作集合建立由网络运营商在控制者(Controller)处直接设置。
在无线多AP协作传输架构中，网络中的协作者(Coordinator)处于某个AP中(称作MAP)，通过无线方式控制其它APs(称作SAPs)。
为便于理解本申请实施例的技术方案，以下对本申请相关的协作波束赋形(Coordinated Beamforming，C-BF)进行说明。
802.11be引入了C-BF模式的多AP协作传输技术，C-BF是多个AP通过波束赋形的方法将有用 信号发送给或对准目标STA，同时将零陷(Null)发送给或对准重叠的基本服务集(Overlapping Basic Service Set，OBSS)的STA，因此可以实现干扰抑制，提升通信链路的信干噪比(Signal to Interference plus Noise Ratio，SINR)，从而提升吞吐量降低通信时延。如图4所示，实线代表AP发送的有用信号，虚线代表AP发送的零陷(Null)。
为便于理解本申请实施例的技术方案，以下对本申请相关信道探测阶段中的信息交互进行说明。
在一些实施例中，多AP协作集合中的多个AP可以进行顺序式信道探测。
例如，多个AP顺序地发送空数据物理层协议数据单元(Null Data PPDU，NDP)给关联的STA以及非关联的OBSS STA进行信道探测，每个AP通过发送(Beamforming Report Poll，BFRP)触发(Trigger)帧收集信道探测结果，即信道状态信息(Channel State Information，CSI)，关联STA以及OBSS STA均可反馈信道探测结果。
如图5所示，多AP协作集合包括AP1和AP2，AP1为MAP，AP2为SAP，AP1关联STA 11～STA 1N,AP2关联STA 21～STA 2N。在信道探测阶段，AP1发送NDP通知(NDP Announcement，NDPA)1帧宣布将要发送NDP帧，在短帧间间隔(short interframe space，SIFS)之后发送NDP1帧，AP1和AP2关联的STA接收该NDP1帧，得到信道探测结果，AP1发送BFRP Trigger帧触发AP1和AP2以及其关联的STA上报信道探测结果；然后，AP2发送NDPA2帧宣布将要发送NDP帧，在SIFS之后发送NDP2帧，AP1和AP2关联的STA接收该NDP2帧，得到信道探测结果，AP2发送BFRP Trigger帧触发AP1和AP2关联的STA上报信道探测结果。
多AP协作集合中的AP进行多AP协作传输首先需要计算转向矩阵(steering matrix)，具体地，AP可以根据收集的信道探测结果计算进行多AP协作传输的转向矩阵。
但是在实际应用中，在完成信道探测之后，多AP协作集合中的SAP可能由于某些原因(例如信道状态为忙)不参与多AP协作传输，基于收集的全部信道探测结果计算转向矩阵，会造成性能损失，因此，如何计算用于多AP协作传输的转向矩阵是一项亟需解决的问题。
为便于理解本申请实施例的技术方案，以下通过具体实施例详述本申请的技术方案。以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
图6是根据本申请实施例的无线通信的方法200的示意性交互图，如图6所示，该方法200包括如下内容：
S210，第一接入点AP向至少一个第二AP发送第一信息。
在一些实施例中，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。
在一些实施例中，所述第一AP为共享AP(Sharing AP)，所述第二AP为被共享AP(Shared AP)。
在一些实施例中，所述第一AP为MAP，所述第二AP为SAP。
在一些实施例中，所述第一AP既为Sharing AP，又为MAP。
在一些实施例中，所述多AP协作集合中的AP预存有信道状态信息，该信道状态信息可以是在信道探测阶段获取的，例如，在最近的一次信道探测阶段获取的。该信道状态信息可以用于计算用于C-BF的转向矩阵。
在一些实施例中，所述用于C-BF的转向矩阵或称C-BF转向矩阵，或传输矩阵(TX Matrix)。
在一些实施例中，所述信道状态信息可以包括AP与关联STA之间的信道状态信息和AP和不关联STA(例如，OBSS STA)之间的信道状态信息，其中，关联STA指该AP所关联的STA，OBSS STA指该AP的OBSS中的STA。
可选地，本申请实施例的C-BF的多AP协作传输模式适用于AP和/或STA位置较为固定，环境的无线信道变化较弱的相对静态场景，当无线通信的环境发生较大变化(例如AP和/或STA发生较为明显的位置变化或者新加入了其它AP和/或STA)，那么预存的信道状态信息不能够准确反应出各个AP与各个STA之间的CSI信息。基于无线通信环境变化之前的信道状态信息计算得到的转向矩阵进行协作传输可能使得C-BF的性能不佳，此时需要重新进行前面的信道探测或者进行部分的信道探测得到最新的更为准确的信道状态信息，然后根据最新的信道状态信息重新计算得到新的转向矩阵，从而使得C-BF的性能保持最佳状态。
在一些实施例中，所述第一信息用于指示多AP协作集合中的AP对于C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的STA对于C-BF模式的多AP协作传输的参与情况。
在一些实施例中，AP对于C-BF模式的多AP协作传输的参与情况可以包括AP是否参与C-BF模式的多AP协作传输，STA对于C-BF模式的多AP协作传输的参与情况可以包括STA是否参与C-BF模式的多AP协作传输。
在本申请实施例中，参与C-BF模式的多AP协作传输或称参与C-BF，多AP协作传输或称协作传输。例如，参与C-BF模式的多AP协作传输的AP也可以表述为参与C-BF的AP，参与C-BF模式的多AP协作传输的STA可以表述为参与C-BF的STA。
为便于区分和说明，将多AP协作集合中参与C-BF的AP记为第一类AP，将多AP协作集合中不参与C-BF的AP记为第二类AP，将参与C-BF的STA记为第一类STA，将不参与C-BF的STA记为第二类STA。
在一些实施例中，所述至少一个第二AP为第一类AP。
即，第一AP只告知参与C-BF的AP该第一信息。
在一些实施例中，所述第一信息可以指示以下中的至少一项：
第一类AP，第二类AP，第一类STA，第二类STA。
因此，所述第二AP根据第一信息可以确定参与C-BF的AP和/或参与C-BF的STA。
在一些实施例中，对于第二类AP，其关联的STA通常均不参与C-BF，因此，所述第一类STA可以为第一类AP对应的第一类STA，所述第二类STA可以为第一类AP对应的第二类STA。
也即，第一信息可以指示以下中的至少一项：
第一类AP，第二类AP，第一类AP关联的第一类STA，第一类AP关联的第二类STA。
作为示例而非限定，所述第一信息用于指示以下中的至少一项：
至少一个AP，包括所述多AP协作集合中参与C-BF模式的多AP协作传输的AP，和/或，所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP；
至少一个STA集合，每个STA集合对应参与C-BF模式的多AP协作传输的一个AP，所述STA集合包括对应的AP关联的STA中参与C-BF模式的多AP协作传输的STA，和/或，对应的AP关联的STA中不参与C-BF模式的多AP协作传输的STA。
也即，所述至少一个AP包括至少一个第一类AP和/或至少一个第二类AP。
也即，所述至少一个STA集合中的每个STA集合对应一个第一类AP，每个STA集合包括所述第一类AP关联的第一类STA和/或所述第一类AP关联的第二类AP。
在本申请实施例中，参与C-BF的第二AP在获知所述第一信息后，可以根据所述第一信息和该第二AP预存的信道状态信息，计算用于该第二AP进行C-BF的转向矩阵，例如所述第二AP可以根据第一信息剔除预存的信道状态信息中的第二AP和第二类STA之间的信道状态信息，只根据所述第二AP和第一类STA之间的信道状态信息计算转向矩阵，进一步基于该转向矩阵进行多AP协作传输，有利于保证第二AP将有用信号发送给目标STA，将零陷(Null)发送给OBSS STA，实现有效的干扰抑制，提升通信链路的SINR。
在一些实施例中，所述多AP协作集合中的AP可以获知多AP协作集合包括的AP，以及所述多AP协作集合中的其他AP的关联STA。例如，在多AP协作集合建立阶段，各个AP可以通过信息交互获知其他AP所关联的STA。
以下，结合具体实施例，说明第一信息的具体实现。
情况1：所述第一信息仅指示至少一个第一类AP。
可选地，此情况下，第二AP可以认为所述至少一个第一类AP关联的所有STA均参与C-BF，即，所述至少一个第一类AP关联的所有STA均为第一类STA，所述多AP协作集合中除所述至少一个第一类AP之外的其他AP均为第二类AP，所述第二类AP关联的所有STA均为第二类STA。
可选地，在多AP协作集合中的AP能够获知其他AP关联的STA，并且参与C-BF的AP所关联的所有STA均参与C-BF的情况下，所述第一信息可以只指示该参与C-BF的AP，而不需要指示其关联的STA的参与情况。
情况2：所述第一信息仅指示至少一个第二类AP。
可选地，此情况下，第二AP可以认为所述至少一个第二类AP关联的所有STA均不参与C-BF，即，所述至少一个第二类AP关联的所有STA均为第二类STA，所述多AP协作集合中除所述至少一个第二类AP之外的其他AP均为第一类AP，所述第一类AP关联的所有STA均为第一类STA。
可选地，在多AP协作集合中的AP能够获知其他AP关联的STA，并且参与C-BF的AP所关联的所有STA均参与C-BF的情况下，所述第一信息可以只指示不参与C-BF的AP。
情况3：所述第一信息仅指示至少一个第一类AP和至少一个第一类STA集合。
可选的，在该情况3中，第一类AP和第一类STA集合的数量可以相同，每个第一类AP对应一个第一类STA集合，每个第一类STA集合用于指示对应的第一类AP关联的参与C-BF的STA，则该第一类AP关联的其他STA均为第二类STA。
可选的，在该情况3中，第一类AP和第一类STA集合的数量可以不同，例如，第一类AP的数 量大于第一类STA集合的数量。
可选地，此情况下，对于不对应第一类STA集合的第一类AP，可以认为其关联的所有STA均参与C-BF，对于对应第一类STA集合的第一类AP，可以根据其对应的第一类STA集合确定该第一类AP关联的STA中参与C-BF的STA，则该第一类AP关联的其他STA均为第二类STA。
情况4：所述第一信息仅指示至少一个第一类AP和至少一个第二类STA集合。
可选的，在该情况4中，第一类AP和第二类STA集合的数量可以相同，每个第一类AP对应一个第二类STA集合，每个第二类STA集合用于指示对应的第一类AP关联的不参与C-BF的STA，则该第一类AP关联的其他STA均为第一类STA。
可选的，在该情况4中，第一类AP和第二类STA集合的数量可以不同，例如，第一类AP的数量大于第二类STA集合的数量。
可选地，此情况下，对于不对应第二类STA集合的第一类AP，可以认为其关联的所有STA均参与C-BF，对于对应第二类STA集合的第一类AP，可以根据其对应的第二类STA集合确定该第一类AP关联的STA中不参与C-BF的STA，则该第一类AP关联的其他STA均为第一类STA。
在一些实施例中，所述第一信息可以直接指示至少一个第一类AP和/或至少一个第二类AP。
例如，第一信息包括至少一个第一类AP的标识(Identity，ID)，或，至少一个第二类AP的ID。
即，第一AP可以显式指示参与C-BF的AP的ID，或者，不参与C-BF的AP的ID。
在另一些实施例中，所述第一信息可以通过位图(bitmap)方式指示至少一个第一类AP和/或至少一个第二类AP。
例如，第一信息包括第一C-BF位图，所述第一C-BF位图包括N个比特，每个比特对应多AP协作集合中的一个AP，例如第一个比特对应多AP协作集合中的第一个AP，第二个比特对应多AP协作集合中的第二个AP等，每个比特的取值用于指示对应的AP是否参与C-BF，其中，N为多AP协作集合包括的AP数，N为大于1的正整数。
可选地，若所述多AP协作集合中的AP可以获知所述多AP协作集合包括哪些AP，则第一信息可以不包括该多AP协作集合中的AP的ID，只需要包括第一C-BF位图，只要多AP协作集合中的AP对于第一C-BF位图中的每个比特和AP的对应关系的理解一致即可。
在一些实施例中，所述第一信息可以直接指示至少一个第一类STA集合和/或至少一个第二类STA集合。
例如，第一信息包括至少一个参与C-BF的STA列表(即第一类STA集合)和/或至少一个不参与C-BF的STA列表(即第二类STA集合)，其中，每个参与C-BF的STA列表对应一个第一类AP，每个不参与C-BF的STA列表对应一个第一类AP，所述参与C-BF的STA列表用于指示对应的第一类AP关联的第一类STA，所述不参与C-BF的STA列表用于指示对应的第一类AP关联的第二类STA。
例如，第一AP可以指示第一类AP关联的参与C-BF的STA的ID或不参与C-BF的STA的ID。
在另一些实施例中，所述第一信息可以通过位图(bitmap)方式指示至少一个第一类STA集合和/或至少一个第二类STA集合。
例如，第一信息包括至少一个关联STA列表和至少一个第二C-BF位图，每个STA列表对应一个第一类AP，每个第二C-BF位图对应一个第一类AP，所述关联STA列表用于指示对应的第一类AP关联的所有STA，所述第二C-BF位图包括K个比特，每个比特对应第一类AP的关联STA列表中的一个STA，例如第一个比特对应第一类AP的关联STA列表中的第一个STA，第二个比特对应第一类AP的关联STA列表中的第二个STA等，每个比特的取值用于指示对应的STA是否参与C-BF，其中，K为第一类AP关联的STA数，K为正整数。
可选地，若所述多AP协作集合中的AP可以获知所述多AP协作集合中的其他AP关联的STA信息，则第一信息可以不包括所述至少一个关联STA列表，只需要包括至少一个第二C-BF位图，只要多AP协作集合中的AP对于第二C-BF位图中的每个比特和STA的对应关系的理解一致即可。
在一些实施例中，所述第一信息还包括第一指示信息，所述第一指示信息用于指示采用的协作传输模式，例如，第一指示信息用于指示采用C-BF模式的多AP协作传输。
在一些实施例中，所述第一信息携带在第一帧中，所述第一帧包括协作传输通知(Coordinated TX Announce)字段，所述协作传输通知字段用于承载所述第一信息。
在一些实施例中，所述第一帧或称协作传输通知(Coordinated TX Announce)帧，或者其他类似命名，本申请对此不作限定。
应理解，在本申请实施例中，帧或字段的命名仅为示例，不应对本申请构成任何限定，具体的保护范围以帧或字段中承载的信息为准。
图7是本申请实施例提供的一种协作传输通知帧的帧格式示意图。应理解，图7所示的帧格式中 承载的信息，以及帧格式中的每个字段的位置和大小仅为示例，其可以根据实际需求或承载的信息灵活调整，并且，当第一信息通过前述实施例中的其他方式指示时，可以对该协作传输通知帧的帧格式进行适应性调整，本申请对此不作限定。
如图7所示，该协作传输通知帧可以包括如下域(或者说，字段)(field)：
帧控制(Frame Control，占用2个字节)、长度(Duration，占用2个字节)、接收地址(Receiving Address，RA)(占用6个字节)、发送地址(Transmission Address，TA)(占用6个字节)、协作传输通知(Coordinated TX Announce)(占用字节数可变(variable))、帧校验序列(Frame Check Sequence，FCS)(占用4个字节)。
在一些实施例中，如图7所示，所述协作传输通知字段包括以下至少一个字段：
采用的协作传输模式字段(Coordinated TX Scheme Adopted field)，用于指示执行多AP协作传输所采用的模式，即用于承载前述第一指示信息；
C-BF参数字段(C-BF Parameters field)，用于指示执行C-BF模式的多AP协作传输所采用的参数或命令，即用于承载前述第一信息；
协作正交频分多址接入(Coordinated Orthogonal Frequency Division Multiple Access，C-OFDMA)参数字段(C-OFDMA Parameters field)，用于指示执行C-OFDMA模式的多AP协作传输所采用的参数或命令；
协作空间复用(Coordinated Spatial Reuse，C-SR)参数字段(C-SR Parameters field)，用于指示执行C-SR模式的多AP协作传输所采用的参数或命令；
联合传输(Joint Transmission，J-TX)参数字段(J-TX Parameters field)，用于指示执行J-TX模式的多AP协作传输所采用的参数或命令；
协作上行多用户多输入多输出(Coordinated Uplink Multiple-User Multiple Input Multiple Output，C-UL MU MIMO)参数字段(C-UL MU-MIMO Parameters field)，用于指示执行C-UL MU MIMO模式的多AP协作传输所采用的参数或命令。
在一些实施例中，Coordinated TX Scheme Adopted field可以占用1个字节。
在一些实施例中，C-BF Parameters field占用字节数可变(variable)。
在一些实施例中，C-OFDMA Parameters field可以占用1个字节。
在一些实施例中，C-SR Parameters field可以占用1个字节。
在一些实施例中，J-TX Parameters field可以占用1个字节。
在一些实施例中，C-UL MU-MIMO Parameters field可以占用1个字节。
在一些实施例中，如图8所示，Coordinated TX Scheme Adopted field包括如下至少一个字段：
采用C-BF(C-BF Adopted)字段，用于指示是否采用C-BF模式的多AP协作传输；
采用C-OFDMA(C-OFDMA Adopted)字段，用于指示是否采用C-OFDMA模式的多AP协作传输；
采用C-SR(C-SR Adopted)字段，用于指示是否采用C-SR模式的多AP协作传输；
采用J-TX(J-TX Adopted)字段，用于指示是否采用J-TX模式的多AP协作传输；
采用C-UL MU MIMO(C-UL MU-MIMO Adopted)字段，用于指示是否采用采用C-UL MU MIMO模式的多AP协作传输。
可选的，C-BF Adopted字段取值为1指示进行C-BF模式的多AP协作传输，此情况下，所述第一帧包括C-BF Parameters field；C-BF Adopted字段取值为0指示不进行C-BF模式的多AP协作传输，此情况下，所述第一帧不包括C-BF Parameters field。
可选的，C-OFDMA Adopted字段取值为1指示进行C-OFDMA模式的多AP协作传输，此情况下，所述第一帧包括C-OFDMA Parameters field；C-OFDMA Adopted字段取值为0指示不进行C-OFDMA模式的多AP协作传输，此情况下，所述第一帧不包括C-OFDMA Parameters field。
可选的，C-SR Adopted字段取值为1指示进行C-SR模式的多AP协作传输，此情况下，所述第一帧包括C-SR Parameters field；C-SR Adopted字段取值为0指示不进行C-SR模式的多AP协作传输，此情况下，所述第一帧不包括C-SR Parameters field。
可选的，J-TX Adopted字段取值为1指示进行J-TX模式的多AP协作传输，此情况下，所述第一帧包括J-TX Parameters field；J-TX Adopted字段取值为0指示不进行J-TX模式的多AP协作传输，此情况下，所述第一帧不包括J-TX Parameters field。
可选的，C-UL MU-MIMO Adopted字段取值为1指示进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述第一帧包括C-UL MU-MIMO Parameters field；C-UL MU-MIMO Adopted字段取值为0指示不进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述第一帧不包括C-UL  MU-MIMO Parameters field。
在一些实施例中，所述C-BF参数字段包括以下至少一个字段：
AP数量(Number of APs)字段，用于指示所述第一帧中包括的AP数量；
至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP和/或不参与C-BF模式的多AP协作传输的AP；
至少一个关联STA列表字段，每个关联STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述关联STA列表字段用于指示对应的AP所关联的STA列表；
至少一个C-BF位图(即前文中的第二C-BF位图)字段，每个C-BF位图字段对应所述至少一个AP ID字段所指示的一个AP，所述C-BF位图字段用于指示对应的AP关联的STA列表中的STA是否参与C-BF模式的多AP协作传输。即至少一个C-BF位图字段用于承载第二C-BF位图。
在一些实施例中，如图9所示，所述至少一个AP ID字段可以包括第一个AP ID(即1 st AP ID)字段，……，第m个AP ID(即m th AP ID)字段等，第一个AP ID(1 st AP ID)字段表示第1个参与C-BF的AP的ID，m th AP ID指示第m个参与C-BF的AP的ID。
可选地，所述至少一个AP ID字段用于指示参与C-BF的AP。
在一些实施例中，如图9所示，所述至少一个关联STA列表字段可以包括第一个AP(即第一个AP ID字段所指示的AP)关联的STA列表(Associated STA List of 1 st AP)字段，……，第m个AP(即第m个AP ID字段所指示的AP)关联的STA列表(Associated STA List of m th AP ID)字段等，Associated STA List of 1 st AP字段表示第1个参与C-BF的AP所关联的STA列表，Associated STA List of m th AP ID指示第m个参与C-BF的AP所关联的STA列表。
进一步地，如图9所示，每个关联STA列表字段包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示当前AP关联的STA数；
至少一个STA ID字段，用于指示当前AP所关联的STA，其中，k th STA ID用于指示当前AP关联的第k个STA的ID。
在一些实施例中，如图9所示，所述至少一个C-BF位图字段可以包括第一个AP(即第一个AP ID字段所指示的AP)关联的STA的C-BF位图(C-BF Bitmap of 1 st AP’s Associated STAs)字段，……，第m个AP(即第m个AP ID字段所指示的AP)关联的STA列表(C-BF Bitmap of m th AP’s Associated STAs)字段等。其中，C-BF Bitmap of 1 st AP’s Associated STAs字段用于指示第1个参与C-BF的AP关联的STA列表中的STA是否参与C-BF，C-BF Bitmap of m th AP’s Associated STAs指示第m个参与C-BF的AP关联的STA列表中的STA是否参与C-BF。
在一些实施例中，如图9所示，C-BF位图字段可以包括k个STA Bitmap，k表示AP关联的STA数，每个STA Bitmap对应AP关联的一个STA，例如，1 st STA Bitmap对应AP关联的1 st STA，k th STA Bitmap对应AP关联的k th STA，每个STA对应的STA Bitmap用于指示该STA是否参与C-BF。作为示例，若某个STA参与C-BF，则该STA对应的STA Bitmap设置为1，否则设置为0。
应理解，图9仅以通过bitmap方式指示STA对于C-BF的参与情况作为示例，在其他实施例中，也可以直接指示参与C-BF的STA，或者不参与C-BF的STA。
例如，所述C-BF参数字段也可以包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
至少一个参与C-BF的STA列表字段，每个参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述参与C-BF的STA列表字段用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
又例如，所述C-BF参数字段包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
至少一个用于不C-BF的STA列表字段，每个不参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述不参与C-BF的STA列表字段用于指示对应的AP关联的不参与C-BF模式的多AP协作传输的STA。
在本申请一些实施例中，所述方法200还包括：
所述第一AP向至少一个第三AP发送第一请求信息，所述第一请求信息用于请求所述至少一个第三AP参与C-BF模式的多AP协作传输，所述至少一个第三AP属于所述多AP协作集合。
在一些实施例中，所述至少一个第三AP包括多AP协作集合的所有AP。
在一些实施例中，所述至少一个第三AP包括所述至少一个第二AP。
例如，所述至少一个第二AP可以为所述至少一个第三AP中参与C-BF的AP。
即，第一AP可以请求至少一个第三AP参与C-BF，进一步地，只向同意参与C-BF的AP发送第一信息。
在一些实施例中，所述第一请求信息包括第二指示信息，所述第二指示信息用于指示所述第一AP请求参与的协作传输模式。例如，第二指示信息用于指示请求参与C-BF模式的多AP协作传输。
在一些实施例中，在所述第二指示信息指示请求参与C-BF模式的多AP协作传输的情况下，可以认为第一AP请求所述至少一个第三AP上报AP及其关联的STA对于C-BF的参与情况。
在一些实施例中，所述第一AP向至少一个第三AP发送第一请求信息，包括：
所述第一AP通过广播或组播方式向所述至少一个第三AP发送所述第一请求信息；或者
所述第一AP通过单播方式向所述至少一个第三AP发送所述第一请求信息。
在一些实施例中，所述第一请求信息携带在第二帧中。
即，第二帧可以通过广播、组播或单播方式发送的。
在一些实施例中，所述第二帧或称协作传输请求(Coordinated TX Request)帧，或者其他类似命名，本申请对此不作限定。
在本申请一些实施例中，所述方法200还包括：
所述第一AP接收所述至少一个第三AP中的每个第三AP发送的第一响应信息。
所述第一响应信息用于反馈所述第三AP是否参与C-BF模式的多AP协作传输和/或所述第三AP关联的STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应信息携带在第三帧中。
在一些实施例中，所述第三帧或称协作传输响应(Coordinated TX Responce)帧，或者其他类似命名，本申请对此不作限定。
在一些实施例中，所述第一AP接收所述至少一个第三AP中的每个第三AP发送的第一响应信息，包括：
所述第一AP接收所述至少一个第三AP同步发送的第一响应信息；或
所述第一AP接收所述至少一个第三AP异步发送的第一响应信息。
即，第三帧可以是同步或异步发送的。
例如，在第二帧通过广播或组播方式发送时，第一AP接收至少一个第三AP同步发送的第三帧。
又例如，在第二帧通过单播方式发送时，第一AP接收至少一个第三AP异步发送的第三帧。
在一些实施例中，对于拒绝参与C-BF的第三AP，可以不在第一响应信息中指示其关联的STA对于C-BF的参与情况，此情况下，可以认为该第三AP关联的所有STA均不参与C-BF。
在一些实施例中，对于参与C-BF的第三AP，可以在第一响应信息中向第一AP指示其关联的STA对于C-BF的参与情况。可选地，如果第三AP关联的STA均参与C-BF，并且其他AP能够获知该第三AP关联的STA的情况下，该第三AP也可以不在第一响应信息中指示其关联的STA对于C-BF的参与情况。接收到该第一响应信息的第一AP根据该第一响应信息确定该第三AP关联的STA均参与C-BF。
在一些实施例中，所述第一响应可以直接指示所述第三AP对应的第一类STA集合和/或第二类STA集合。
例如，第一响应信息包括参与C-BF的STA列表(即第一类STA集合)和/或不参与C-BF的STA列表(即第二类STA集合)，其中，所述参与C-BF的STA列表用于指示第三AP关联的第一类STA，所述不参与C-BF的STA列表用于指示第三AP关联的第二类STA。
例如，第三AP可以显式指示第三AP关联的参与C-BF的STA的ID，或者，不参与C-BF的STA的ID。
在另一些实施例中，所述第一响应信息可以通过位图(bitmap)方式指示第三AP对应的第一类STA集合和/或第二类STA集合。
例如，第一响应信息包括关联STA列表和第三C-BF位图，所述关联STA列表用于指示第三AP关联的所有STA，所述第三C-BF位图包括K个比特，每个比特对应第三AP的关联STA列表中的一个STA，例如第一个比特对应第三AP的关联STA列表中的第一个STA，第二个比特对应第三AP的关联STA列表中的第二个STA等，每个比特的取值用于指示对应的STA是否参与C-BF，其中，K为第三AP关联的STA数，K为正整数。
可选地，若第一AP能够获知所述多AP协作集合中的AP关联的STA信息，则第一响应信息可以不包括所述关联STA列表，只需要包括第三C-BF位图，只要第一AP和第三AP对于第三C-BF位图中的每个比特和STA的对应关系的理解一致即可。
在一些实施例中，所述第一响应信息还包括第三指示信息，所述第三指示信息用于指示所述第三AP接受的协作传输模式。例如，所述第三指示信息用于指示是否接受C-BF的多AP协作传输。
结合图10和图11，以第一AP为AP1，角色为Sharing AP，所述至少一个第三AP包括AP m，AP n等，角色为Shared AP为例，说明协作传输请求帧和协作传输响应帧的交互方式。
如图10所示，Sharing AP可以采用广播或组播方式向Shared AP发送协作传输请求帧，用于请求Shared AP参与C-BF模式的多AP协作传输，或者说，询问Shared AP是否参与C-BF模式的多AP协作传输，Shared AP可以同步回复协作传输响应帧。
例如，AP m在参与C-BF的情况下，回复协作传输响应帧，指示接受Sharing AP的请求。
此情况下，该AP m还可以在协作传输响应帧中指示该AP m关联的第一类STA集合和/或第二类STA集合。
又例如，AP n在不参与C-BF的情况下，回复协作传输响应帧，指示拒绝Sharing AP的请求。
此情况下，该AP n可以不在协作传输响应帧中指示该AP n关联的第一类STA集合和/或第二类STA集合，因为，该AP n关联的所有STA均不参与C-BF。
进一步地，Sharing AP可以发送协作传输通知帧，将收集的Shared AP是否参与C-BF的信息和/或Shared AP关联的STA是否参与C-BF的信息告知参与C-BF的Shared AP。
可选地，接收到协作传输通知帧的Shared AP可以通过确认(Ack)帧确认Sharing AP发送的协作传输通知帧，Shared AP也可以不发Ack帧，默认接受Sharing AP发送的协作传输通知帧。
如图11所示，Sharing AP采用单播方式向Shared AP发送协作传输请求帧，用于请求Shared AP参与C-BF模式的多AP协作传输，或者说，询问Shared AP是否参与C-BF模式的多AP协作传输，Shared AP可以异步回复协作传输响应帧。
例如，Sharing AP向AP m发送协作传输请求帧后，AP m在参与C-BF的情况下，回复协作传输响应帧，指示接受Sharing AP的请求。此情况下，该AP m还可以在协作传输响应帧中指示该AP m关联的第一类STA集合和/或第二类STA集合。
又例如，Sharing AP向AP n发送协作传输请求帧后，AP n在不参与C-BF的情况下，回复协作传输响应帧，指示拒绝Sharing AP的请求。此情况下，该AP n可以不在协作传输响应帧中指示该AP n关联的第一类STA集合和/或第二类STA集合，因为该AP n关联的所有STA均不参与C-BF。
进一步地，Sharing AP可以发送协作传输通知帧，将收集的Shared AP是否参与C-BF的信息和/或Shared AP关联的STA是否参与C-BF的信息告知参与C-BF的Shared AP。
可选地，接收到协作传输通知帧的Shared AP可以通过Ack帧确认Sharing AP发送的协作传输通知帧，Shared AP也可以不发Ack帧，默认接受Sharing AP发送的协作传输通知帧。
以下，结合图12至图15，说明协作传输请求帧和协作传输响应帧的帧格式设计。
应理解，图12至图15所示的帧格式中承载的信息，以及帧格式中的每个字段的位置和大小仅为示例，其可以根据实际需求或承载的信息灵活调整，例如当第一响应信息通过前述实施例中的其他方式指示时，可以对该协作传输响应帧的帧格式进行适应性调整，本申请对此不作限定。
图12是本申请实施例提供的一种协作传输请求帧的帧格式示意图，其可以包括如下域(或者说，字段)(field)：
帧控制(Frame Control，占用2个字节)、长度(Duration，占用2个字节)、接收地址(Receiving Address，RA)(占用6个字节)、发送地址(Transmission Address，TA)(占用6个字节)、协作传输请求(Coordinated TX Request)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，如图12所示，所述协作传输请求字段包括以下至少一个字段：
使用的协作传输模式字段(Coordinated TX Scheme Used field)，用于指示请求使用的协作传输模式，即用于承载前述第二指示信息；
C-BF命令(C-BF Command)字段，用于指示采用C-BF模式的多AP协作传输时所使用的命令；
C-OFDMA命令(C-OFDMA Command)字段，用于指示采用C-OFDMA模式的多AP协作传输时所使用的命令；
C-SR命令(C-SR Command)字段，用于指示采用C-SR模式的多AP协作传输时所使用的命令；
J-TX命令(J-TX Command)字段，用于指示采用J-TX模式的多AP协作传输时所使用的命令；
C-UL MU MIMO命令(C-UL MU-MIMO Command)字段，用于指示采用C-UL MU MIMO模式的多AP协作传输时所使用的命令。
在一些实施例中，如图12所示，所述Coordinated TX Scheme Used field包括以下至少一个字段：
使用C-BF(C-BF Used)字段，用于指示是否请求使用C-BF模式的多AP协作传输；
使用C-OFDMA(C-OFDMA Used)字段，用于指示是否请求使用C-OFDMA模式的多AP协作 传输；
使用C-SR(C-SR Used)字段，用于指示是否请求使用C-SR模式的多AP协作传输；
使用J-TX(J-TX Used)字段，用于指示是否请求使用J-TX模式的多AP协作传输；
使用C-UL MU MIMO(C-UL MU-MIMO Used)字段，用于指示是否请求使用C-UL MU MIMO模式的多AP协作传输。
可选的，C-BF Used字段取值为1指示请求Shared AP进行C-BF模式的多AP协作传输，此情况下，所述协作传输请求帧包括C-BF Command field；C-BF Used字段取值为0指示不请求Shared AP进行C-BF模式的多AP协作传输，此情况下，所述协作传输请求帧不包括C-BF Command field。
可选的，C-OFDMA Used字段取值为1指示请求Shared AP进行C-OFDMA模式的多AP协作传输，此情况下，所述协作传输请求帧包括C-OFDMA Command field；C-OFDMA Used字段取值为0指示不请求Shared AP进行C-OFDMA模式的多AP协作传输，此情况下，所述协作传输请求帧不包括C-OFDMA Command field。
可选的，C-SR Used字段取值为1指示请求Shared AP进行C-SR模式的多AP协作传输，此情况下，所述协作传输请求帧包括C-SR Command field；C-SR Used字段取值为0指示不请求Shared AP进行C-SR模式的多AP协作传输，此情况下，所述协作传输请求帧不包括C-SR Command field。
可选的，J-TX Used字段取值为1指示请求Shared AP进行J-TX模式的多AP协作传输，此情况下，所述协作传输请求帧包括J-TX Command field；J-TX Used字段取值为0指示不请求Shared AP进行J-TX模式的多AP协作传输，此情况下，所述协作传输请求帧不包括J-TX Command field。
可选的，C-UL MU-MIMO Used字段取值为1指示请求Shared AP进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述协作传输请求帧包括C-UL MU-MIMO Command field；C-UL MU-MIMO Used字段取值为0指示不请求Shared AP进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述协作传输请求帧不包括C-UL MU-MIMO Command field。
图13至图15是本申请实施例提供的协作传输响应帧的帧格式示意图。
如图13所示，协作传输响应帧可以包括如下域(或者说，字段)(field)：
帧控制(Frame Control，占用2个字节)、长度(Duration，占用2个字节)、接收地址(Receiving Address，RA)(占用6个字节)、发送地址(Transmission Address，TA)(占用6个字节)、协作传输响应(Coordinated TX Responce)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，如图13所示，所述协作传输响应字段包括以下至少一个字段：
接受的协作传输模式字段(Coordinated TX Scheme Accept field)，用于指示所述第三AP是否接受请求的协作传输模式；
C-BF信息字段(C-BF Info.field)，用于指示所述第三AP与C-BF相关的信息；
C-OFDMA信息字段(C-OFDMA Info.field)，用于指示所述第三AP与C-OFDMA相关的信息；
C-SR信息字段(C-SR Info.field)，用于指示所述第三AP与C-SR相关的信息；
J-TX信息字段(J-TX Info.field)，用于指示所述第三AP与J-TX相关的信息；
C-UL MU MIMO信息字段(C-UL MU-MIMO Info.field)，用于指示所述第三AP与C-UL MU MIMO相关的信息。
在一些实施例中，如图14所示，所述接受的协作传输模式字段包括以下至少一个字段：
接受C-BF(C-BF Accept)字段，用于指示是否接受C-BF模式的多AP协作传输；
接受C-OFDMA(C-OFDMA Accept)字段，用于指示是否接受C-OFDMA模式的多AP协作传输；
接受C-SR(C-SR Accept)字段，用于指示是否接受C-SR模式的多AP协作传输；
接受J-TX(J-TX Accept)字段，用于指示是否接受J-TX模式的多AP协作传输；
接受C-UL MU MIMO(C-UL MU-MIMO Accept)字段，用于指示是否接受C-UL MU MIMO模式的协作传输。
可选的，C-BF Accept字段取值为1指示接受进行C-BF模式的多AP协作传输，此情况下，所述协作传输响应帧包括C-BF Info.field；C-BF Accept字段取值为0指示拒绝进行C-BF模式的多AP协作传输，此情况下，所述协作传输响应帧不包括C-BF Info.field。
可选的，C-OFDMA Accept字段取值为1指示接受进行C-OFDMA模式的多AP协作传输，此情况下，所述协作传输响应帧包括C-OFDMA Info.field；C-OFDMA Accept字段取值为0指示拒绝进行C-OFDMA模式的多AP协作传输，此情况下，所述协作传输响应帧不包括C-OFDMA Info.field。
可选的，C-SR Accept字段取值为1指示接受进行C-SR模式的多AP协作传输，此情况下，所述协作传输响应帧包括C-SR Info.field；C-SR Accept字段取值为0指示拒绝进行C-SR模式的多AP 协作传输，此情况下，所述协作传输响应帧不包括C-SR Info.field。
可选的，J-TX Accept字段取值为1指示接受进行J-TX模式的多AP协作传输，此情况下，所述协作传输响应帧包括J-TX Info.field；J-TX Accept字段取值为0指示拒绝进行J-TX模式的多AP协作传输，此情况下，所述协作传输响应帧不包括J-TX Info.field。
可选的，C-UL MU-MIMO Accept字段取值为1指示接受进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述协作传输响应帧包括C-UL MU-MIMO Info.field；C-UL MU-MIMO Accept字段取值为0指示拒绝进行C-UL MU-MIMO模式的多AP协作传输，此情况下，所述协作传输响应帧不包括C-UL MU-MIMO Info.field。
在一些实施例中，如图15所示，所述C-BF信息字段包括以下至少一个字段：
关联STA列表字段(Associated STA List subfield)，用于指示所述第三AP关联的STA列表；
关联STA的C-BF位图字段(C-BF Bitmap of Associated STAs subfield)，用于指示所述第三AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。即关联STA的C-BF位图字段用于承载前述第三C-BF位图。
在一些实施例中，如图15所示，关联STA列表字段包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示第三AP关联的STA的数目；
至少一个STA ID字段，用于指示第三AP关联的STA的ID，其中，k th STA ID用于指示第三AP关联的第k个STA的ID。
在一些实施例中，如图15所示，所述关联STA的C-BF位图字段用于指示第三AP关联的STA列表中的STA是否参与C-BF。
例如，关联STA的C-BF位图字段可以包括k个STA Bitmap，每个STA Bitmap对应第三AP关联的一个STA，例如，1 st STA Bitmap对应第三AP关联的1 st STA，k th STA Bitmap对应第三AP关联的k th STA，每个STA对应的STA Bitmap用于指示该STA是否参与C-BF。作为示例，若某个STA参与C-BF，则该STA对应的STA Bitmap设置为1，否则设置为0。
应理解，图15仅以通过bitmap方式指示第三AP关联的STA对于C-BF的参与情况作为示例，在其他实施例中，也可以直接指示第三AP关联的参与C-BF的STA，或者不参与C-BF的STA。
例如，所述C-BF信息字段包括参与C-BF的STA列表字段，用于指示第三AP关联的参与C-BF模式的多AP协作传输的STA。
又例如，所述C-BF信息字段包括不参与C-BF的STA列表字段，用于指示第三AP关联的不参与C-BF模式的多AP协作传输的STA。
在本申请一些实施例中，如图6所示，该方法200还包括：
S220，所述第二AP根据所述第一信息，在预存的信道状态信息中确定目标信道状态信息；
S230，根据所述目标信道状态信息，计算用于C-BF模式的多AP协作传输的转向矩阵。
例如，第二AP根据所述第一信息将所述预存的信道状态信息中的如下信道状态信息剔除，得到所述目标信道状态信息：
所述第二AP和所述第二AP关联的第二类STA之间的信道状态信息；
所述第二AP和第二类AP关联的STA之间的信道状态信息。
进一步地，所述第二AP使用所述转向矩阵向所述第二AP关联的参与C-BF的多AP协作传输的STA发送数据，有利于保证第二AP将有用信号发送给目标STA，将零陷(Null)发送给OBSS STA，实现有效的干扰抑制，提升通信链路的SINR。
结合图16所示具体示例，说明根据本申请实施例的C-BF模式的多AP协作传输的流程。
在图16的示例中，支持C-BF的多AP协作集合建立已经完成，其中，在信道探测阶段，AP1为MAP，AP m和AP n为多AP协作集合中的SAP，其中，STA 1-i关联到AP 1，STA m-i关联到AP m，STA n-i关联到AP n，这里的i代表AP关联的第i个STA。
一、信道探测阶段
在信道探测阶段，多AP协作集合中的AP(包括MAP和SAP)进行顺序式信道探测，各个AP获得并存储其与各个STA(包括关联STA和OBSS STA)之间的信道状态信息。具体的探测方式参考图5所示实施例的相关描述，这里不再赘述。
作为示例而非限定，多AP协作集合中的AP存储的信道状态信息可以如表1所示，在完成信道探测之后，AP 1可以存储AP 1对应的一行信道状态信息，AP m可以存储AP m对应的一行信道状态信息，AP n可以存储AP n对应的一行信道状态信息等。
表1各个AP通过信道探测获得的信道状态信息
  STA 1-i ... STA m-i ... STA n-i
AP 1 H(1,1-i) ... H(1,m-i) ... H(1,n-i)
... ... ... ... ... ...
AP m H(m,1-i) ... H(m,m-i) ... H(m,n-i)
... ... ... ... ... ...
AP n H(n,1-i) ... H(n,m-i) ... H(n,n-i)
其中，H(1,1-i)表示AP 1和STA 1-i之间的信道状态信息，H(m,1-i)表示AP m和STA 1-i之间的信道状态信息，H(n,1-i)表示AP n和STA 1-i之间的信道状态信息，其他信道状态信息的含义类似，这里不再赘述。
二、准备阶段
在准备阶段，Sharing AP发送协作传输请求帧，携带前述第一请求信息，例如，可以通过广播或组播方式发送，或者，也可以通过单播方式发送。Shared AP回复协作传输响应帧，携带前述第一响应信息，例如，Shared AP同步或异步回复协作传输响应帧。
应理解，图16仅以Sharing AP通过广播或组播方式发送协作传输请求帧，Shared AP同步发送协作传输响应帧进行示例，但本申请并不限于此。
Sharing AP根据Shared AP回复的协作传输响应帧，可以确定多AP协作传输集合中的AP对于C-BF的参与情况和/或多AP协作传输集合中的AP关联的STA对于C-BF的参与情况。
即，Sharing AP根据Shared AP回复的协作传输响应帧，可以得到所述第一信息。
Sharing AP向Shared AP发送协作传输通知帧，例如，Sharing AP仅向参与C-BF的Shared AP发送协作传输通知帧，其中，该协作传输通知帧携带所述第一信息。
例如，Sharing AP在协作传输通知帧中将哪些AP及其关联的哪些STA参与C-BF和/或哪些AP及其关联的STA不参与C-BF告知给参与C-BF的Shared AP。
作为示例而非限定，第一信息可以用于指示以下参与情况信息：
AP 1及其关联的STA 1-i参加C-BF，其余STA不参加C-BF；
AP m及其关联的STA m-i参加C-BF，其余STA不参加C-BF；
AP n不参加C-BF，意味着AP n关联的所有STA均不参加C-BF；
进一步地，参加C-BF的Shared AP(例如AP 1和AP m)根据所述第一信息确定存储的信道状态信息中的用于计算转向矩阵的目标信道状态信息。
例如，AP 1和AP m将表1中的以下信道状态信息剔除，得到目标信道状态信息：
1)参与C-BF的AP及其关联的不参与C-BF的STA之间的信道状态信息，例如：
AP 1剔除表1中H(1,1-i)和H(1,m-i)之外的其它信道状态信息；
AP m剔除表1中H(m,1-i)和H(m,m-i)之外的其它信道状态信息。
2)参与C-BF的AP和不参与C-BF的AP所关联的所有STA之间的信道状态信息，例如：
AP 1剔除表1中与AP n关联的STA的信道状态信息(即H(1,n-i))；
AP m剔除表1中与AP n关联的STA的信道状态信息(即H(m,n-i))。
然后，参加C-BF的Shared AP根据所述目标信道状态信息计算用于该Shared AP执行多AP协作传输的C-BF转向矩阵。
例如，AP 1和AP m根据表1中剔除相关信道状态信息之后的目标信道状态信息计算转向矩阵。
例如，AP 1基于信道状态信息(H(1,1-i)和H(1,m-i))，计算AP 1所使用的C-BF转向矩阵，AP m基于信道状态信息(H(m,1-i)和H(m,m-i))，计算AP m所使用的C-BF转向矩阵。
应理解，本申请对于C-BF转向矩阵计算的方法不作限定。计算C-BF转向矩阵的原则是使得该AP所关联的参与C-BF的STA的信号质量(例如SINR)得到加强，非关联的参与C-BF的STA(即其它AP下参与C-BF的STA)的信号质量被削弱(即发送信号的零陷对准非关联的参与C-BF的STA)，从而实现有效的干扰抑制，提升通信链路的SINR。
需要说明的是，在本申请实施例中，当无线通信的环境发生较大变化(例如AP和/或STA发生较为明显的位置变化或者新加入了其它AP和/或STA)时，预存的信道状态信息就不能够准确反应出各个AP与各个STA之间的信道状态信息。此情况下，基于无线通信环境变化之前获得的信道状态信息计算得到的转向矩阵进行协作传输可能使得C-BF的性能不佳，此时需要重新进行前面的信道探测或者进行部分的信道探测得到最新的更为准确的信道状态信息，然后根据最新的信道状态信息重新计算得到新的转向矩阵，从而使得C-BF的性能保持最佳状态。
三、协作传输阶段
在协作传输阶段，Sharing AP发送协作传输触发帧(Coordinated TX Trigger)，用于触发参与C-BF 的AP进行多AP协作传输。例如，参与C-BF的Shared AP按照根据目标信道状态信息计算得到的转向矩阵发送数据。
可选地，如果Sharing AP也参与C-BF，那么Sharing AP也按照提前计算的转向矩阵与其它参与C-BF的Shared AP一起发送数据。各个STA接收到数据之后回复块确认(Block Acknowledgement，BA)帧。
需要说明的是，图16仅以MAP和Sharing AP为同一AP作为示例，在其他实施例中，MAP和Sharing AP也可以为不同的AP，本申请对此不作限定。
在一些实施例中，Sharing AP也可以在协作传输阶段向参与C-BF的AP通知第一信息，此情况下，在准备阶段，Sharing AP可以不发送协作传输通知帧，例如，Sharing AP可以在协作传输触发帧中携带第一信息，进一步地，参与C-BF的Shared AP可以根据该第一信息按照前述的方式计算转向矩阵。此方式可以适用于处理能力较强的Shared AP。
如图17和图18所示，对于处理能力强的Shared AP，可以在非常短时间内(例如SIFS或PIFS或DIFS等)根据第一信息按照前述的方式计算转向矩阵。那么Sharing AP在Preparation阶段也可以不发送协作传输通知帧告知参与C-BF的Shared AP该第一信息，而是在协作传输阶段通过协作传输触发帧来告知各个参与C-BF的Shared AP该第一信息，然后各个参与C-BF的Shared AP根据该第一信息按照前述的方式计算转向矩阵，并根据该转向矩阵发送Data。也就是省掉了图16中的协作传输通知和应答(可选)的步骤。
即，在协作传输阶段，Sharing AP直接使用协作传输触发帧实现协作传输通知帧的功能。其中，协作传输触发帧的帧格式设计参考与图7至图9所示协作传输通知帧的帧格式设计，这里不再赘述。
其中，在图17和图18的区别在于，在图17中的准备阶段，Shared AP同步回复Sharing Ap的协作传输请求，在图18中的准备阶段，Shared AP异步回复Sharing Ap的协作传输请求。
综上，在本申请实施例中，Sharing AP可以收集多AP协作集合中的Shared AP及其关联的STA对于C-BF的多AP协作传输的参与情况，进一步将该参与情况通知给参与C-BF的多AP协作传输的AP，从而该AP可以根据该参与情况在预存的信道状态信息中确定用于计算转向矩阵的目标信道状态信息，基于该目标信道状态信息计算转向矩阵，具体地，AP在计算转向矩阵时，只考虑该AP与参与C-BF的STA，从而可以实现AP将有用信号发送给目标STA，零陷发送给OBSS STA，降低了干扰，提升了传输的性能。
并且，在本申请实施例提供的参与C-BF的AP计算转向矩阵的方法，AP只需根据第一信息对预存的信道状态信息进行剔除，得到用于计算转向矩阵的目标信道状态信息，不需要AP之间交互信道状态信息，能够实现以较低的信令开销实现C-BF的转向矩阵计算。
上文结合图6至图18，详细描述了本申请的方法实施例，下文结合图19至图23，详细描述本申请的装置实施例，应理解，装置实施例与方法实施例相互对应，类似的描述可以参照方法实施例。
图19示出了根据本申请实施例的第一接入点AP 400的示意性框图。如图19所示，该第一AP 400包括：
通信单元410，用于向至少一个第二AP发送第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。
在一些实施例中，所述第一信息用于指示以下中的至少一项：
至少一个AP，所述至少一个AP包括所述多AP协作集合中参与C-BF模式的多AP协作传输的AP，和/或，所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP；
至少一个STA集合，每个STA集合对应参与C-BF模式的多AP协作传输的一个AP，所述STA集合包括对应的AP关联的STA中参与C-BF模式的多AP协作传输的STA，和/或，对应的AP关联的STA中不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述至少一个STA集合通过位图方式指示。
在一些实施例中，所述第一信息包括：
至少一个关联STA列表，每个关联STA列表对应参与C-BF模式的多AP协作传输的一个AP，每个关联STA列表用于指示对应的AP所关联的STA；
至少一个C-BF位图，每个C-BF位图对应参与C-BF模式的多AP协作传输的一个AP，每个C-BF位图用于指示对应的AP关联的STA列表中参与C-BF模式的多AP协作传输的STA或不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第一信息包括至少一个参与C-BF的STA列表，每个参与C-BF的STA列 表对应参与C-BF模式的多AP协作传输的一个AP，所述参与C-BF的STA列表用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第一信息还包括第一指示信息，所述第一指示信息用于指示采用C-BF模式的多AP协作传输。
在一些实施例中，所述第一信息携带在第一帧中，所述第一帧包括协作传输通知字段，所述协作传输通知字段用于承载所述第一信息。
在一些实施例中，所述协作传输通知字段包括以下至少一个字段：
采用的协作传输模式字段，用于指示执行多AP协作传输所采用的模式；
C-BF参数字段，用于指示执行C-BF模式的多AP协作传输所采用的参数；
协作正交频分多址接入C-OFDMA参数字段，用于指示执行C-OFDMA模式的多AP协作传输所采用的参数；
协作空间复用C-SR参数字段，用于指示执行C-SR模式的多AP协作传输所采用的参数；
联合传输J-TX参数字段，用于指示执行J-TX模式的多AP协作传输所采用的参数；
协作上行多用户多输入多输出C-UL MU MIMO参数字段，用于指示执行C-UL MU MIMO模式的多AP协作传输所采用的参数。
在一些实施例中，所述C-BF参数字段包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP标识ID字段，用于指示参与C-BF模式的多AP协作传输的AP和/或不参与C-BF模式的多AP协作传输的AP；
至少一个关联STA列表字段，每个关联STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述关联STA列表字段用于指示对应的AP所关联的STA列表；
至少一个C-BF位图字段，每个C-BF位图字段对应所述至少一个AP ID字段所指示的一个AP，所述C-BF位图字段用于指示对应的AP关联的STA列表中的STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述C-BF参数字段包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
至少一个参与C-BF的STA列表字段，每个参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述参与C-BF的STA列表字段用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述采用的协作传输模式字段包括以下至少一个字段：
采用C-BF字段，用于指示是否采用C-BF模式的多AP协作传输；
采用C-OFDMA字段，用于指示是否采用C-OFDMA模式的多AP协作传输；
采用C-SR字段，用于指示是否采用C-SR模式的多AP协作传输；
采用J-TX字段，用于指示是否采用J-TX模式的多AP协作传输；
采用C-UL MU MIMO字段，用于指示是否采用采用C-UL MU MIMO模式的多AP协作传输。
在一些实施例中，所述第一帧还用于触发参与C-BF模式的多AP协作传输的AP执行C-BF模式的多AP协作传输。
在一些实施例中，所述通信单元410还用于：
向至少一个第三AP发送第一请求信息，所述第一请求信息用于请求所述至少一个第三AP参与C-BF模式的多AP协作传输，所述至少一个第三AP属于所述多AP协作集合。
在一些实施例中，所述至少一个第三AP包括所述至少一个第二AP。
在一些实施例中，所述第一请求信息包括第二指示信息，所述第二指示信息用于指示所述第一AP请求参与的协作传输模式。
在一些实施例中，所述第一请求信息携带在第二帧中，所述第二帧包括协作传输请求字段，所述协作传输请求字段用于承载所述第一请求信息。
在一些实施例中，所述协作传输请求字段包括以下至少一个字段：
使用的协作传输模式字段，用于指示请求使用的协作传输模式；
C-BF命令字段，用于指示采用C-BF模式的多AP协作传输时所使用的命令；
C-OFDMA命令字段，用于指示采用C-OFDMA模式的多AP协作传输时所使用的命令；
C-SR命令字段，用于指示采用C-SR模式的多AP协作传输时所使用的命令；
J-TX命令字段，用于指示采用J-TX模式的多AP协作传输时所使用的命令；
C-UL MU MIMO命令字段，用于指示采用C-UL MU MIMO模式的多AP协作传输时所使用的命令。
在一些实施例中，所述使用的协作传输模式字段包括以下至少一个字段：
使用C-BF字段，用于指示是否请求使用C-BF模式的多AP协作传输；
使用C-OFDMA字段，用于指示是否请求使用C-OFDMA模式的多AP协作传输；
使用C-SR字段，用于指示是否请求使用C-SR模式的多AP协作传输；
使用J-TX字段，用于指示是否请求使用J-TX模式的多AP协作传输；
使用C-UL MU MIMO字段，用于指示是否请求使用C-UL MU MIMO模式的多AP协作传输。
在一些实施例中，所述通信单元410具体用于：
通过广播或组播方式向所述至少一个第三AP发送所述第一请求信息；或者
通过单播方式向所述至少一个第三AP发送所述第一请求信息。
在一些实施例中，所述通信单元410还用于：
接收所述至少一个第三AP中的每个第三AP发送的第一响应信息，所述第一响应信息用于指示所述第三AP是否参与C-BF模式的多AP协作传输和/或所述第三AP关联的STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述通信单元410具体用于：
接收所述至少一个第三AP同步发送的第一响应信息；或
接收所述至少一个第三AP异步发送的第一响应信息。
在一些实施例中，所述第一响应信息包括关联STA列表和C-BF位图，所述关联STA列表为所述第三AP关联的STA列表，所述C-BF位图用于指示所述第三AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应信息包括参与C-BF的STA列表，所述参与C-BF的STA列表为所述第三AP关联的参与C-BF模式的多AP协作传输的STA列表。
在一些实施例中，所述第一响应信息还包括第三指示信息，所述第三指示信息用于指示所述第三AP接受的协作传输模式。
在一些实施例中，所述第一响应信息携带在第三帧中，所述第三帧包括协作传输响应字段，所述协作传输响应字段用于承载所述第一响应信息。
在一些实施例中，所述协作传输响应字段包括以下至少一个字段：
接受的协作传输模式字段，用于指示所述第三AP是否接收请求的协作传输模式；
C-BF信息字段，用于指示所述第三AP与C-BF相关的信息；
C-OFDMA信息字段，用于指示所述第三AP与C-OFDMA相关的信息；
C-SR信息字段，用于指示所述第三AP与C-SR相关的信息；
J-TX信息字段，用于指示所述第三AP与J-TX相关的信息；
C-UL MU MIMO信息字段，用于指示所述第三AP与C-UL MU MIMO相关的信息。
在一些实施例中，所述C-BF信息字段包括以下至少一个字段：
关联STA列表字段，用于指示所述第三AP关联的STA列表；
关联STA的C-BF位图字段，用于指示所述第三AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述C-BF信息字段包括参与C-BF的STA列表字段，用于指示所述第三AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述接受的协作传输模式字段包括以下至少一个字段：
接受C-BF字段，用于指示是否接受C-BF模式的多AP协作传输；
接受C-OFDMA字段，用于指示是否接受C-OFDMA模式的多AP协作传输；
接受C-SR字段，用于指示是否接受C-SR模式的多AP协作传输；
接受J-TX字段，用于指示是否接受J-TX模式的多AP协作传输；
接受C-UL MU MIMO字段，用于指示是否接受C-UL MU MIMO模式的协作传输。
在一些实施例中，所述至少一个第二AP为所述多AP协作集合中参与C-BF模式的多AP协作传输的AP。
在一些实施例中，所述第一AP为共享AP，所述至少一个第二AP为被共享AP。
在一些实施例中，所述第一AP为主AP，所述至少一个第二AP为辅AP。
可选地，在一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的第一AP 400可对应于本申请方法实施例中的第一AP或Sharing AP，并且第一AP 400中的各个单元的上述和其它操作和/或功能分别为了实现图6至18所示方法200中第一AP或Sharing AP的相应流程，为了简洁，在此不再赘述。
图20是根据本申请实施例的第二接入点AP的示意性框图。图5的第二AP 500包括：
通信单元510，用于接收第一AP发送的第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述第二AP属于所述多AP协作集合。
在一些实施例中，所述第一信息用于指示以下中的至少一项：
至少一个AP，所述至少一个AP包括所述多AP协作集合中参与C-BF模式的多AP协作传输的AP，和/或，所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP；
至少一个STA集合，每个STA集合对应参与C-BF模式的多AP协作传输的一个AP，所述STA集合包括对应的AP关联的STA中参与C-BF模式的多AP协作传输的STA，和/或，对应的AP关联的STA中不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述至少一个STA集合通过位图方式指示。
在一些实施例中，所述第一信息包括：
至少一个关联STA列表，每个关联STA列表对应参与C-BF模式的多AP协作传输的一个AP，每个关联STA列表用于指示对应的AP所关联的STA；
至少一个C-BF位图，每个C-BF位图对应参与C-BF模式的多AP协作传输的一个AP，每个C-BF位图用于指示对应的AP关联的STA列表中参与C-BF模式的多AP协作传输的STA或不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第一信息包括至少一个参与C-BF的STA列表，每个参与C-BF的STA列表对应参与C-BF模式的多AP协作传输的一个AP，所述参与C-BF的STA列表用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第一信息还包括第一指示信息，所述第一指示信息用于指示采用C-BF模式的多AP协作传输。
在一些实施例中，所述第一信息携带在第一帧中，所述第一帧包括协作传输通知字段，所述协作传输通知字段用于承载所述第一信息。
在一些实施例中，所述协作传输通知字段包括以下至少一个字段：
采用的协作传输模式字段，用于指示执行多AP协作传输所采用的模式；
C-BF参数字段，用于指示执行C-BF模式的多AP协作传输所采用的参数；
协作正交频分多址接入C-OFDMA参数字段，用于指示执行C-OFDMA模式的多AP协作传输所采用的参数；
协作空间复用C-SR参数字段，用于指示执行C-SR模式的多AP协作传输所采用的参数；
联合传输J-TX参数字段，用于指示执行J-TX模式的多AP协作传输所采用的参数；
协作上行多用户多输入多输出C-UL MU MIMO参数字段，用于指示执行C-UL MU MIMO模式的多AP协作传输所采用的参数。
在一些实施例中，所述C-BF参数字段包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP标识ID字段，用于指示参与C-BF模式的多AP协作传输的AP和/或不参与C-BF模式的多AP协作传输的AP；
至少一个关联STA列表字段，每个关联STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述关联STA列表字段用于指示对应的AP所关联的STA列表；
至少一个C-BF位图字段，每个C-BF位图字段对应所述至少一个AP ID字段所指示的一个AP，所述C-BF位图字段用于指示对应的AP关联的STA列表中的STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述C-BF参数字段包括以下至少一个字段：
AP数量字段，用于指示所述第一帧中包括的AP数量；
至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
至少一个参与C-BF的STA列表字段，每个参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述参与C-BF的STA列表字段用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述采用的协作传输模式字段包括以下至少一个字段：
采用C-BF字段，用于指示是否采用C-BF模式的多AP协作传输；
采用C-OFDMA字段，用于指示是否采用C-OFDMA模式的多AP协作传输；
采用C-SR字段，用于指示是否采用C-SR模式的多AP协作传输；
采用J-TX字段，用于指示是否采用J-TX模式的多AP协作传输；
采用C-UL MU MIMO字段，用于指示是否采用采用C-UL MU MIMO模式的多AP协作传输。
在一些实施例中，所述第一帧还用于触发参与C-BF模式的多AP协作传输的AP执行C-BF模式的多AP协作传输。
在一些实施例中，所述通信单元510还用于：
接收所述第一AP发送的第一请求信息，所述第一请求信息用于请求所述第二AP参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一请求信息包括第二指示信息，所述第二指示信息用于指示所述第一AP请求参与的协作传输模式。
在一些实施例中，所述第一请求信息携带在第二帧中，所述第二帧包括协作传输请求字段，所述协作传输请求字段用于承载所述第一请求信息。
在一些实施例中，所述协作传输请求字段包括以下至少一个字段：
使用的协作传输模式字段，用于指示请求使用的协作传输模式；
C-BF命令字段，用于指示采用C-BF模式的多AP协作传输时所使用的命令；
C-OFDMA命令字段，用于指示采用C-OFDMA模式的多AP协作传输时所使用的命令
C-SR命令字段，用于指示采用C-SR模式的多AP协作传输时所使用的命令
J-TX命令字段，用于指示采用J-TX模式的多AP协作传输时所使用的命令
C-UL MU MIMO命令字段，用于指示采用C-UL MU MIMO模式的多AP协作传输时所使用的命令。
在一些实施例中，所述使用的协作传输模式字段包括以下至少一个字段：
使用C-BF字段，用于指示是否请求使用C-BF模式的多AP协作传输；
使用C-OFDMA字段，用于指示是否请求使用C-OFDMA模式的多AP协作传输；
使用C-SR字段，用于指示是否请求使用C-SR模式的多AP协作传输；
使用J-TX字段，用于指示是否请求使用J-TX模式的多AP协作传输；
使用C-UL MU MIMO字段，用于指示是否请求使用C-UL MU MIMO模式的多AP协作传输。
在一些实施例中，所述通信单元510具体用于：
接收所述第一AP通过广播或组播方式发送的所述第一请求信息；或者
接收所述第一AP通过单播方式发送的所述第一请求信息。
在一些实施例中，所述通信单元510还用于：
向所述第一AP发送第一响应信息，所述第一响应信息用于指示所述第二AP是否参与C-BF模式的多AP协作传输和/或所述第二AP关联的STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应信息包括关联STA列表和C-BF位图，所述关联STA列表为所述第二AP关联的STA列表，所述C-BF位图用于指示所述第二AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应信息包括参与C-BF的STA列表，所述参与C-BF的STA列表为所述第二AP关联的参与C-BF模式的多AP协作传输的STA列表。
在一些实施例中，所述第一响应信息还包括第三指示信息，所述第三指示信息用于指示所述第二AP接受的协作传输模式。
在一些实施例中，所述第一响应信息携带在第三帧中，所述第三帧包括协作传输响应字段，所述协作传输响应字段用于承载所述第一响应信息。
在一些实施例中，所述协作传输响应字段包括以下至少一个字段：
接受的协作传输模式字段，用于指示所述第二AP接受的协作传输模式；
C-BF信息字段，用于指示所述第二AP与C-BF相关的信息；
C-OFDMA信息字段，用于指示所述第二AP与C-OFDMA相关的信息；
C-SR信息字段，用于指示所述第二AP与C-SR相关的信息；
J-TX信息字段，用于指示所述第二AP与J-TX相关的信息；
C-UL MU MIMO信息字段，用于指示所述第二AP与C-UL MU MIMO相关的信息。
在一些实施例中，所述C-BF信息字段包括以下至少一个字段：
关联STA列表字段，用于指示所述第二AP关联的STA列表；
关联STA的C-BF位图字段，用于指示所述第二AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
在一些实施例中，所述C-BF信息字段包括参与C-BF的STA列表字段，用于指示所述第二AP关联的参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述接受的协作传输模式字段包括以下至少一个字段：
接受C-BF字段，用于指示是否接受C-BF模式的多AP协作传输；
接受C-OFDMA字段，用于指示是否接受C-OFDMA模式的多AP协作传输；
接受C-SR字段，用于指示是否接受C-SR模式的多AP协作传输；
接受J-TX字段，用于指示是否接受J-TX模式的多AP协作传输；
接受C-UL MU MIMO字段，用于指示是否接受C-UL MU MIMO模式的协作传输。
在一些实施例中，所述第二接入点还包括：
处理单元，用于根据所述第一信息，在预存的信道状态信息中确定目标信道状态信息；
根据所述目标信道状态信息，计算用于C-BF模式的多AP协作传输的转向矩阵。
在一些实施例中，所述处理单元具体用于：
根据所述第一信息将所述预存的信道状态信息中的如下信道状态信息剔除，得到所述目标信道状态信息：
所述第二AP和所述第二AP关联的第二类STA之间的信道状态信息；
所述第二AP和第二类AP关联的STA之间的信道状态信息；
其中，所述第二类STA是不参与C-BF的多AP协作传输的STA，所述第二类AP是不参与C-BF的多AP协作传输的AP。
在一些实施例中，所述通信单元510还用于：
使用所述转向矩阵向所述第二AP关联的参与C-BF的多AP协作传输的STA发送数据。
在一些实施例中，所述预存的信道状态信息是所述第二AP在信道探测阶段获得的。
在一些实施例中，所述第二AP为所述多AP协作集合中参与C-BF模式的多AP协作传输的AP。
在一些实施例中，所述第一AP为共享AP，所述第二AP为被共享AP。
在一些实施例中，所述第一AP为主AP，所述第二AP为辅AP。
可选地，在一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的第二AP 500可对应于本申请方法实施例中的第二AP或Shared AP，并且第二AP 500中的各个单元的上述和其它操作和/或功能分别为了实现图6至图18所示方法200中第二AP或Shared AP的相应流程，为了简洁，在此不再赘述。
图21是本申请实施例提供的一种通信设备600示意性结构图。图21所示的通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图21所示，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，如图21所示，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600具体可为本申请实施例的第一AP或Sharing AP，并且该通信设备600可以实现本申请实施例的各个方法中由第一AP或Sharing AP实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备600具体可为本申请实施例的第二AP或Shared AP，并且该通信设备600可以实现本申请实施例的各个方法中由第二AP或Shared AP实现的相应流程，为了简洁，在此不再赘述。
图22是本申请实施例的芯片的示意性结构图。图22所示的芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图22所示，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的第一AP或Sharing AP，并且该芯片可以实现本申请实施例的各个方法中由第一AP或Sharing AP实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的第二AP或Shared AP，并且该芯片可以实现本申请实施例的各个方法中由第二AP或Shared AP实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图23是本申请实施例提供的一种通信系统900的示意性框图。如图23所示，该通信系统900包括第一接入点910和第二接入点920。
其中，该第一接入点910可以用于实现上述方法中由第一AP或Sharing AP实现的相应的功能，以及该第二接入点920可以用于实现上述方法中由第二AP或Shared AP实现的相应的功能为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的第一AP或Sharing AP，并且该计算机程序使得计算机执行本申请实施例的各个方法中由第一AP或Sharing AP实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的第二AP或Shared AP，并且该计算机程序使得计算机执行本申请实施例的各个方法中由第二AP或Shared AP实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的第一AP或Sharing AP，并且该计算机程 序指令使得计算机执行本申请实施例的各个方法中由第一AP或Sharing AP实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的第二AP或Shared AP，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由第二AP或Shared AP实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的第一AP或Sharing AP，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由第一AP或Sharing AP实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的第二AP或Shared AP，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由第二AP或Shared AP实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，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。
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，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、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系统，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或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。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。
所述功能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，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请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部分可以以软件产品的形式体现出来，该计算机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台计算机设备(可以是个人计算机，服务器，或者网络设备等)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、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (73)

  1. 一种无线通信的方法，其特征在于，包括：
    第一接入点AP向至少一个第二AP发送第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息用于指示以下中的至少一项：
    至少一个AP，所述至少一个AP包括所述多AP协作集合中参与C-BF模式的多AP协作传输的AP，和/或，所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP；
    至少一个STA集合，每个STA集合对应参与C-BF模式的多AP协作传输的一个AP，所述STA集合包括对应的AP关联的STA中参与C-BF模式的多AP协作传输的STA，和/或，对应的AP关联的STA中不参与C-BF模式的多AP协作传输的STA。
  3. 根据权利要求2所述的方法，其特征在于，所述至少一个STA集合通过位图方式指示。
  4. 根据权利要求3所述的方法，其特征在于，所述第一信息包括：
    至少一个关联STA列表，每个关联STA列表对应参与C-BF模式的多AP协作传输的一个AP，每个关联STA列表用于指示对应的AP所关联的STA；
    至少一个C-BF位图，每个C-BF位图对应参与C-BF模式的多AP协作传输的一个AP，每个C-BF位图用于指示对应的AP关联的STA列表中参与C-BF模式的多AP协作传输的STA或不参与C-BF模式的多AP协作传输的STA。
  5. 根据权利要求2所述的方法，其特征在于，所述第一信息包括至少一个参与C-BF的STA列表，每个参与C-BF的STA列表对应参与C-BF模式的多AP协作传输的一个AP，所述参与C-BF的STA列表用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，所述第一信息还包括第一指示信息，所述第一指示信息用于指示采用C-BF模式的多AP协作传输。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，所述第一信息携带在第一帧中，所述第一帧包括协作传输通知字段，所述协作传输通知字段用于承载所述第一信息。
  8. 根据权利要求7所述的方法，其特征在于，所述协作传输通知字段包括以下至少一个字段：
    采用的协作传输模式字段，用于指示执行多AP协作传输所采用的模式；
    C-BF参数字段，用于指示执行C-BF模式的多AP协作传输所采用的参数；
    协作正交频分多址接入C-OFDMA参数字段，用于指示执行C-OFDMA模式的多AP协作传输所采用的参数；
    协作空间复用C-SR参数字段，用于指示执行C-SR模式的多AP协作传输所采用的参数；
    联合传输J-TX参数字段，用于指示执行J-TX模式的多AP协作传输所采用的参数；
    协作上行多用户多输入多输出C-UL MU MIMO参数字段，用于指示执行C-UL MU MIMO模式的多AP协作传输所采用的参数。
  9. 根据权利要求8所述的方法，其特征在于，所述C-BF参数字段包括以下至少一个字段：
    AP数量字段，用于指示所述第一帧中包括的AP数量；
    至少一个AP标识ID字段，用于指示参与C-BF模式的多AP协作传输的AP和/或不参与C-BF模式的多AP协作传输的AP；
    至少一个关联STA列表字段，每个关联STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述关联STA列表字段用于指示对应的AP所关联的STA列表；
    至少一个C-BF位图字段，每个C-BF位图字段对应所述至少一个AP ID字段所指示的一个AP，所述C-BF位图字段用于指示对应的AP关联的STA列表中的STA是否参与C-BF模式的多AP协作传输。
  10. 根据权利要求8所述的方法，其特征在于，所述C-BF参数字段包括以下至少一个字段：
    AP数量字段，用于指示所述第一帧中包括的AP数量；
    至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
    至少一个参与C-BF的STA列表字段，每个参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述参与C-BF的STA列表字段用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
  11. 根据权利要求8-10中任一项所述的方法，其特征在于，所述采用的协作传输模式字段包括以下至少一个字段：
    采用C-BF字段，用于指示是否采用C-BF模式的多AP协作传输；
    采用C-OFDMA字段，用于指示是否采用C-OFDMA模式的多AP协作传输；
    采用C-SR字段，用于指示是否采用C-SR模式的多AP协作传输；
    采用J-TX字段，用于指示是否采用J-TX模式的多AP协作传输；
    采用C-UL MU MIMO字段，用于指示是否采用采用C-UL MU MIMO模式的多AP协作传输。
  12. 根据权利要求7-11中任一项所述的方法，其特征在于，所述第一帧还用于触发参与C-BF模式的多AP协作传输的AP执行C-BF模式的多AP协作传输。
  13. 根据权利要求1-12中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一AP向至少一个第三AP发送第一请求信息，所述第一请求信息用于请求所述至少一个第三AP参与C-BF模式的多AP协作传输，所述至少一个第三AP属于所述多AP协作集合。
  14. 根据权利要求13所述的方法，其特征在于，所述至少一个第三AP包括所述至少一个第二AP。
  15. 根据权利要求13或14所述的方法，其特征在于，所述第一请求信息包括第二指示信息，所述第二指示信息用于指示所述第一AP请求参与的协作传输模式。
  16. 根据权利要求13-15中任一项所述的方法，其特征在于，所述第一请求信息携带在第二帧中，所述第二帧包括协作传输请求字段，所述协作传输请求字段用于承载所述第一请求信息。
  17. 根据权利要求16所述的方法，其特征在于，所述协作传输请求字段包括以下至少一个字段：
    使用的协作传输模式字段，用于指示请求使用的协作传输模式；
    C-BF命令字段，用于指示采用C-BF模式的多AP协作传输时所使用的命令；
    C-OFDMA命令字段，用于指示采用C-OFDMA模式的多AP协作传输时所使用的命令；
    C-SR命令字段，用于指示采用C-SR模式的多AP协作传输时所使用的命令；
    J-TX命令字段，用于指示采用J-TX模式的多AP协作传输时所使用的命令；
    C-UL MU MIMO命令字段，用于指示采用C-UL MU MIMO模式的多AP协作传输时所使用的命令。
  18. 根据权利要求17所述的方法，其特征在于，所述使用的协作传输模式字段包括以下至少一个字段：
    使用C-BF字段，用于指示是否请求使用C-BF模式的多AP协作传输；
    使用C-OFDMA字段，用于指示是否请求使用C-OFDMA模式的多AP协作传输；
    使用C-SR字段，用于指示是否请求使用C-SR模式的多AP协作传输；
    使用J-TX字段，用于指示是否请求使用J-TX模式的多AP协作传输；
    使用C-UL MU MIMO字段，用于指示是否请求使用C-UL MU MIMO模式的多AP协作传输。
  19. 根据权利要求13-18中任一项所述的方法，其特征在于，所述第一AP向至少一个第三AP发送第一请求信息，包括：
    所述第一AP通过广播或组播方式向所述至少一个第三AP发送所述第一请求信息；或者
    所述第一AP通过单播方式向所述至少一个第三AP发送所述第一请求信息。
  20. 根据权利要求13-19中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一AP接收所述至少一个第三AP中的每个第三AP发送的第一响应信息，所述第一响应信息用于指示所述第三AP是否参与C-BF模式的多AP协作传输和/或所述第三AP关联的STA是否参与C-BF模式的多AP协作传输。
  21. 根据权利要求20所述的方法，其特征在于，所述第一AP接收所述至少一个第三AP中的每个第三AP发送的第一响应信息，包括：
    所述第一AP接收所述至少一个第三AP同步发送的第一响应信息；或
    所述第一AP接收所述至少一个第三AP异步发送的第一响应信息。
  22. 根据权利要求20或21所述的方法，其特征在于，所述第一响应信息包括关联STA列表和C-BF位图，所述关联STA列表为所述第三AP关联的STA列表，所述C-BF位图用于指示所述第三AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
  23. 根据权利要求20或21所述的方法，其特征在于，所述第一响应信息包括参与C-BF的STA列表，所述参与C-BF的STA列表为所述第三AP关联的参与C-BF模式的多AP协作传输的STA列表。
  24. 根据权利要求20-22中任一项所述的方法，其特征在于，所述第一响应信息还包括第三指示信息，所述第三指示信息用于指示所述第三AP接受的协作传输模式。
  25. 根据权利要求20-24中任一项所述的方法，其特征在于，所述第一响应信息携带在第三帧中， 所述第三帧包括协作传输响应字段，所述协作传输响应字段用于承载所述第一响应信息。
  26. 根据权利要求25所述的方法，其特征在于，所述协作传输响应字段包括以下至少一个字段：
    接受的协作传输模式字段，用于指示所述第三AP是否接收请求的协作传输模式；
    C-BF信息字段，用于指示所述第三AP与C-BF相关的信息；
    C-OFDMA信息字段，用于指示所述第三AP与C-OFDMA相关的信息；
    C-SR信息字段，用于指示所述第三AP与C-SR相关的信息；
    J-TX信息字段，用于指示所述第三AP与J-TX相关的信息；
    C-UL MU MIMO信息字段，用于指示所述第三AP与C-UL MU MIMO相关的信息。
  27. 根据权利要求26所述的方法，其特征在于，所述C-BF信息字段包括以下至少一个字段：
    关联STA列表字段，用于指示所述第三AP关联的STA列表；
    关联STA的C-BF位图字段，用于指示所述第三AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
  28. 根据权利要求26所述的方法，其特征在于，所述C-BF信息字段包括参与C-BF的STA列表字段，用于指示所述第三AP关联的参与C-BF模式的多AP协作传输的STA。
  29. 根据权利要求26-28中任一项所述的方法，其特征在于，所述接受的协作传输模式字段包括以下至少一个字段：
    接受C-BF字段，用于指示是否接受C-BF模式的多AP协作传输；
    接受C-OFDMA字段，用于指示是否接受C-OFDMA模式的多AP协作传输；
    接受C-SR字段，用于指示是否接受C-SR模式的多AP协作传输；
    接受J-TX字段，用于指示是否接受J-TX模式的多AP协作传输；
    接受C-UL MU MIMO字段，用于指示是否接受C-UL MU MIMO模式的协作传输。
  30. 根据权利要求1-29中任一项所述的方法，其特征在于，所述至少一个第二AP为所述多AP协作集合中参与C-BF模式的多AP协作传输的AP。
  31. 根据权利要求1-30中任一项所述的方法，其特征在于，所述第一AP为共享AP，所述至少一个第二AP为被共享AP。
  32. 根据权利要求1-31中任一项所述的方法，其特征在于，所述第一AP为主AP，所述至少一个第二AP为辅AP。
  33. 一种无线通信的方法，其特征在于，包括：
    第二接入点AP接收第一AP发送的第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述第二AP属于所述多AP协作集合。
  34. 根据权利要求33所述的方法，其特征在于，所述第一信息用于指示以下中的至少一项：
    至少一个AP，所述至少一个AP包括所述多AP协作集合中参与C-BF模式的多AP协作传输的AP，和/或，所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP；
    至少一个STA集合，每个STA集合对应参与C-BF模式的多AP协作传输的一个AP，所述STA集合包括对应的AP关联的STA中参与C-BF模式的多AP协作传输的STA，和/或，对应的AP关联的STA中不参与C-BF模式的多AP协作传输的STA。
  35. 根据权利要求34所述的方法，其特征在于，所述至少一个STA集合通过位图方式指示。
  36. 根据权利要求35所述的方法，其特征在于，所述第一信息包括：
    至少一个关联STA列表，每个关联STA列表对应参与C-BF模式的多AP协作传输的一个AP，每个关联STA列表用于指示对应的AP所关联的STA；
    至少一个C-BF位图，每个C-BF位图对应参与C-BF模式的多AP协作传输的一个AP，每个C-BF位图用于指示对应的AP关联的STA列表中参与C-BF模式的多AP协作传输的STA或不参与C-BF模式的多AP协作传输的STA。
  37. 根据权利要求34所述的方法，其特征在于，所述第一信息包括至少一个参与C-BF的STA列表，每个参与C-BF的STA列表对应参与C-BF模式的多AP协作传输的一个AP，所述参与C-BF的STA列表用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
  38. 根据权利要求33-37中任一项所述的方法，其特征在于，所述第一信息还包括第一指示信息，所述第一指示信息用于指示采用C-BF模式的多AP协作传输。
  39. 根据权利要求33-38中任一项所述的方法，其特征在于，所述第一信息携带在第一帧中，所述第一帧包括协作传输通知字段，所述协作传输通知字段用于承载所述第一信息。
  40. 根据权利要求39所述的方法，其特征在于，所述协作传输通知字段包括以下至少一个字段：
    采用的协作传输模式字段，用于指示执行多AP协作传输所采用的模式；
    C-BF参数字段，用于指示执行C-BF模式的多AP协作传输所采用的参数；
    协作正交频分多址接入C-OFDMA参数字段，用于指示执行C-OFDMA模式的多AP协作传输所采用的参数；
    协作空间复用C-SR参数字段，用于指示执行C-SR模式的多AP协作传输所采用的参数；
    联合传输J-TX参数字段，用于指示执行J-TX模式的多AP协作传输所采用的参数；
    协作上行多用户多输入多输出C-UL MU MIMO参数字段，用于指示执行C-UL MU MIMO模式的多AP协作传输所采用的参数。
  41. 根据权利要求40所述的方法，其特征在于，所述C-BF参数字段包括以下至少一个字段：
    AP数量字段，用于指示所述第一帧中包括的AP数量；
    至少一个AP标识ID字段，用于指示参与C-BF模式的多AP协作传输的AP和/或不参与C-BF模式的多AP协作传输的AP；
    至少一个关联STA列表字段，每个关联STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述关联STA列表字段用于指示对应的AP所关联的STA列表；
    至少一个C-BF位图字段，每个C-BF位图字段对应所述至少一个AP ID字段所指示的一个AP，所述C-BF位图字段用于指示对应的AP关联的STA列表中的STA是否参与C-BF模式的多AP协作传输。
  42. 根据权利要求40所述的方法，其特征在于，所述C-BF参数字段包括以下至少一个字段：
    AP数量字段，用于指示所述第一帧中包括的AP数量；
    至少一个AP ID字段，用于指示参与C-BF模式的多AP协作传输的至少一个AP；
    至少一个参与C-BF的STA列表字段，每个参与C-BF的STA列表字段对应所述至少一个AP ID字段所指示的一个AP，所述参与C-BF的STA列表字段用于指示对应的AP关联的参与C-BF模式的多AP协作传输的STA。
  43. 根据权利要求40-42中任一项所述的方法，其特征在于，所述采用的协作传输模式字段包括以下至少一个字段：
    采用C-BF字段，用于指示是否采用C-BF模式的多AP协作传输；
    采用C-OFDMA字段，用于指示是否采用C-OFDMA模式的多AP协作传输；
    采用C-SR字段，用于指示是否采用C-SR模式的多AP协作传输；
    采用J-TX字段，用于指示是否采用J-TX模式的多AP协作传输；
    采用C-UL MU MIMO字段，用于指示是否采用采用C-UL MU MIMO模式的多AP协作传输。
  44. 根据权利要求39-43中任一项所述的方法，其特征在于，所述第一帧还用于触发参与C-BF模式的多AP协作传输的AP执行C-BF模式的多AP协作传输。
  45. 根据权利要求33-44中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二AP接收所述第一AP发送的第一请求信息，所述第一请求信息用于请求所述第二AP参与C-BF模式的多AP协作传输。
  46. 根据权利要求45所述的方法，其特征在于，所述第一请求信息包括第二指示信息，所述第二指示信息用于指示所述第一AP请求参与的协作传输模式。
  47. 根据权利要求45或46所述的方法，其特征在于，所述第一请求信息携带在第二帧中，所述第二帧包括协作传输请求字段，所述协作传输请求字段用于承载所述第一请求信息。
  48. 根据权利要求47所述的方法，其特征在于，所述协作传输请求字段包括以下至少一个字段：
    使用的协作传输模式字段，用于指示请求使用的协作传输模式；
    C-BF命令字段，用于指示采用C-BF模式的多AP协作传输时所使用的命令；
    C-OFDMA命令字段，用于指示采用C-OFDMA模式的多AP协作传输时所使用的命令
    C-SR命令字段，用于指示采用C-SR模式的多AP协作传输时所使用的命令
    J-TX命令字段，用于指示采用J-TX模式的多AP协作传输时所使用的命令
    C-UL MU MIMO命令字段，用于指示采用C-UL MU MIMO模式的多AP协作传输时所使用的命令。
  49. 根据权利要求48所述的方法，其特征在于，所述使用的协作传输模式字段包括以下至少一个字段：
    使用C-BF字段，用于指示是否请求使用C-BF模式的多AP协作传输；
    使用C-OFDMA字段，用于指示是否请求使用C-OFDMA模式的多AP协作传输；
    使用C-SR字段，用于指示是否请求使用C-SR模式的多AP协作传输；
    使用J-TX字段，用于指示是否请求使用J-TX模式的多AP协作传输；
    使用C-UL MU MIMO字段，用于指示是否请求使用C-UL MU MIMO模式的多AP协作传输。
  50. 根据权利要求45-49中任一项所述的方法，其特征在于，所述第二AP接收所述第一AP发送的第一请求信息，包括：
    所述第二AP接收所述第一AP通过广播或组播方式发送的所述第一请求信息；或者
    所述第二AP接收所述第一AP通过单播方式发送的所述第一请求信息。
  51. 根据权利要求45-50中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二AP向所述第一AP发送第一响应信息，所述第一响应信息用于指示所述第二AP是否参与C-BF模式的多AP协作传输和/或所述第二AP关联的STA是否参与C-BF模式的多AP协作传输。
  52. 根据权利要求51所述的方法，其特征在于，所述第一响应信息包括关联STA列表和C-BF位图，所述关联STA列表为所述第二AP关联的STA列表，所述C-BF位图用于指示所述第二AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
  53. 根据权利要求51所述的方法，其特征在于，所述第一响应信息包括参与C-BF的STA列表，所述参与C-BF的STA列表为所述第二AP关联的参与C-BF模式的多AP协作传输的STA列表。
  54. 根据权利要求51-53中任一项所述的方法，其特征在于，所述第一响应信息还包括第三指示信息，所述第三指示信息用于指示所述第二AP接受的协作传输模式。
  55. 根据权利要求51-54中任一项所述的方法，其特征在于，所述第一响应信息携带在第三帧中，所述第三帧包括协作传输响应字段，所述协作传输响应字段用于承载所述第一响应信息。
  56. 根据权利要求55所述的方法，其特征在于，所述协作传输响应字段包括以下至少一个字段：
    接受的协作传输模式字段，用于指示所述第二AP接受的协作传输模式；
    C-BF信息字段，用于指示所述第二AP与C-BF相关的信息；
    C-OFDMA信息字段，用于指示所述第二AP与C-OFDMA相关的信息；
    C-SR信息字段，用于指示所述第二AP与C-SR相关的信息；
    J-TX信息字段，用于指示所述第二AP与J-TX相关的信息；
    C-UL MU MIMO信息字段，用于指示所述第二AP与C-UL MU MIMO相关的信息。
  57. 根据权利要求56所述的方法，其特征在于，所述C-BF信息字段包括以下至少一个字段：
    关联STA列表字段，用于指示所述第二AP关联的STA列表；
    关联STA的C-BF位图字段，用于指示所述第二AP关联的STA列表中的每个STA是否参与C-BF模式的多AP协作传输。
  58. 根据权利要求56所述的方法，其特征在于，所述C-BF信息字段包括参与C-BF的STA列表字段，用于指示所述第二AP关联的参与C-BF模式的多AP协作传输的STA。
  59. 根据权利要求56-58中任一项所述的方法，其特征在于，所述接受的协作传输模式字段包括以下至少一个字段：
    接受C-BF字段，用于指示是否接受C-BF模式的多AP协作传输；
    接受C-OFDMA字段，用于指示是否接受C-OFDMA模式的多AP协作传输；
    接受C-SR字段，用于指示是否接受C-SR模式的多AP协作传输；
    接受J-TX字段，用于指示是否接受J-TX模式的多AP协作传输；
    接受C-UL MU MIMO字段，用于指示是否接受C-UL MU MIMO模式的协作传输。
  60. 根据权利要求33-59中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二AP根据所述第一信息，在预存的信道状态信息中确定目标信道状态信息；
    根据所述目标信道状态信息，计算用于C-BF模式的多AP协作传输的转向矩阵。
  61. 根据权利要求60所述的方法，其特征在于，所述第二AP根据所述第一信息，在预存的信道状态信息中确定目标信道状态信息，包括：
    所述第二AP根据所述第一信息将所述预存的信道状态信息中的如下信道状态信息剔除，得到所述目标信道状态信息：
    所述第二AP和所述第二AP关联的第二类STA之间的信道状态信息；
    所述第二AP和第二类AP关联的STA之间的信道状态信息；
    其中，所述第二类STA是不参与C-BF的多AP协作传输的STA，所述第二类AP是不参与C-BF的多AP协作传输的AP。
  62. 根据权利要求61所述的方法，其特征在于，所述方法还包括：
    所述第二AP使用所述转向矩阵向所述第二AP关联的参与C-BF的多AP协作传输的STA发送数据。
  63. 根据权利要求60-62中任一项所述的方法，其特征在于，所述预存的信道状态信息是所述第二AP在信道探测阶段获得的。
  64. 根据权利要求33-62中任一项所述的方法，其特征在于，所述第二AP为所述多AP协作集合中参与C-BF模式的多AP协作传输的AP。
  65. 根据权利要求33-64中任一项所述的方法，其特征在于，所述第一AP为共享AP，所述第二AP为被共享AP。
  66. 根据权利要求33-65中任一项所述的方法，其特征在于，所述第一AP为主AP，所述第二AP为辅AP。
  67. 一种第一接入点AP，其特征在于，包括：
    通信单元，用于向至少一个第二AP发送第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述至少一个第二AP属于所述多AP协作集合。
  68. 一种第二接入点AP，其特征在于，包括：
    通信单元，用于接收第一AP发送的第一信息，所述第一信息用于指示多AP协作集合中的AP对于协作波束赋形C-BF模式的多AP协作传输的参与情况和/或所述多AP协作集合中的AP关联的站点STA对于C-BF模式的多AP协作传输的参与情况，所述第一AP和所述第二AP属于所述多AP协作集合。
  69. 一种接入点，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至32中任一项所述的方法，或者，如权利要求33至66中任一项所述的方法。
  70. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至32中任一项所述的方法，或者，如权利要求33至66中任一项所述的方法。
  71. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至32中任一项所述的方法，或者，如权利要求33至66中任一项所述的方法。
  72. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至32中任一项所述的方法，或者，如权利要求33至66中任一项所述的方法。
  73. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至32中任一项所述的方法，或者，如权利要求33至66中任一项所述的方法。
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