WO2023155148A1 - 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
WO2023155148A1
WO2023155148A1 PCT/CN2022/076873 CN2022076873W WO2023155148A1 WO 2023155148 A1 WO2023155148 A1 WO 2023155148A1 CN 2022076873 W CN2022076873 W CN 2022076873W WO 2023155148 A1 WO2023155148 A1 WO 2023155148A1
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field
csi
mode
type
indicate
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PCT/CN2022/076873
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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/CN2022/076873 priority Critical patent/WO2023155148A1/zh
Publication of WO2023155148A1 publication Critical patent/WO2023155148A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

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 wireless communication method including: a first access point AP acquires target channel state information CSI, and the target CSI includes CSI between a first type of AP and a first type of station STA, wherein,
  • the first type of AP is an AP that participates in multi-AP cooperative transmission in the cooperative beamforming C-BF mode in the multi-AP cooperative set
  • the first type of STA is an STA that participates in the multi-AP cooperative transmission in the C-BF mode
  • the target CSI is used to calculate the steering matrix corresponding to each first-type AP in the multi-AP cooperative set
  • the steering matrix corresponding to the first-type AP is used for the first-type AP to execute the C-BF mode Multi-AP cooperative transmission.
  • a wireless communication method including: the second access point AP sends the first type of channel state information CSI and/or the second type of CSI obtained by the second AP to the first AP, wherein, The second AP is a first-type AP in a multi-AP cooperative set, and the first-type CSI obtained by the second AP includes a CSI between the second AP and a first-type station STA associated with the second AP.
  • the second type of CSI obtained by the second AP includes the CSI between the second AP and a first type of STA in the overlapping basic service set OBSS of the second AP, and the first type of AP is a participating An AP for multi-AP cooperative transmission in the coordinated beamforming C-BF mode, the first type of STA is an STA participating in the multi-AP cooperative transmission in the C-BF mode.
  • a wireless communication method including: a main access point AP acquires target channel state information CSI, and the target CSI includes CSI between a first type of AP and a first type of station STA, wherein the The first type of AP is an AP that participates in multi-AP cooperative transmission in the cooperative beamforming C-BF mode in the multi-AP cooperative set, and the first type of STA is an STA that participates in the multi-AP cooperative transmission in the C-BF mode,
  • the target CSI is used to calculate a steering matrix corresponding to each first-type AP in the multi-AP cooperative set, and the steering matrix corresponding to the first-type AP is used for the first-type AP to execute the C-BF mode.
  • Multi-AP cooperative transmission including: a main access point AP acquires target channel state information CSI, and the target CSI includes CSI between a first type of AP and a first type of station STA, wherein the The first type of AP is an AP that participates in multi-AP cooperative transmission in the cooperative beam
  • an access point device configured to execute the method in the foregoing first aspect or various implementation manners thereof.
  • the access point device includes a functional module for executing the method in the above first aspect or its various implementation manners.
  • an access point device configured to execute the method in the above-mentioned second aspect or each implementation manner thereof.
  • the access point device includes a functional module for executing the method in the above second aspect or each implementation manner thereof.
  • a master access point device configured to execute the method in the above third aspect or various implementations thereof.
  • the master access point device includes a functional module for executing the method in the above third aspect or its various implementation manners.
  • an access point device 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 device 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 main access point device including a processor and a memory.
  • the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above third aspect or its various implementations.
  • a chip configured to implement any one of the foregoing first to third aspects 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 third 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 third aspects or the method in each implementation manner thereof.
  • a computer program product including computer program instructions, the computer program instructions causing a computer to execute any one of the above first to third aspects or the method in each implementation manner.
  • a thirteenth aspect provides a computer program, which, when running on a computer, causes the computer to execute any one of the above first to third aspects or the method in each implementation manner.
  • the shared AP can obtain the target CSI
  • the target CSI is the CSI between the AP participating in C-BF and the STA
  • the target CSI is used to calculate the steering matrix corresponding to the AP participating in C-BF, that is, the implementation of this application
  • the steering matrix corresponding to the AP participating in C-BF
  • the implementation of this application For example, when calculating the steering matrix, only the CSI between the APs and STAs participating in the multi-AP cooperative transmission of C-BF is considered. Therefore, performing multi-AP cooperative transmission based on the steering matrix is beneficial for the AP to send useful signals to the target STA.
  • the trap is sent to OBSS STA, which reduces interference and improves transmission performance.
  • 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 the shared AP collecting CSI information step by step and the shared AP synchronously responding.
  • FIG. 8 is a schematic diagram of the shared AP collecting CSI information step by step and the shared AP responding asynchronously.
  • FIG. 9 is a schematic diagram of the shared AP collecting CSI information once and the shared AP responding synchronously.
  • FIG. 10 is a schematic diagram of the shared AP collecting CSI information once and the shared AP responding asynchronously.
  • Fig. 11 is a schematic interaction diagram of a multi-AP cooperative transmission process according to an embodiment of the present application.
  • FIG. 12 and FIG. 13 are schematic interaction diagrams of a shared AP notifying a steering matrix by triggering a frame through cooperative transmission.
  • FIG. 14 is a schematic diagram of a frame format of a coordinated transmission request frame provided by an embodiment of the present application.
  • FIG. 15 is a schematic format diagram of the used coordinated transmission mode field in the coordinated transmission request frame shown in FIG. 14 .
  • FIG. 16 is a schematic format diagram of the C-BF command field in the coordinated transmission request frame shown in FIG. 14 .
  • FIG. 17 is a schematic diagram of a frame format of a cooperative transmission response frame provided by an embodiment of the present application.
  • FIG. 18 is a schematic format diagram of an accepted coordinated transmission mode field in the coordinated transmission response frame shown in FIG. 17 .
  • FIG. 19 is a schematic format diagram of the C-BF information field in the coordinated transmission response frame shown in FIG. 17 .
  • FIG. 20 is a schematic diagram of a frame format of a CSI request frame provided by an embodiment of the present application.
  • FIG. 21 is a schematic diagram of a frame format of a CSI report frame provided by an embodiment of the present application.
  • Fig. 22 is a schematic diagram of a frame format of a coordinated transmission notification frame provided by an embodiment of the present application.
  • FIG. 23 is a schematic format diagram of the adopted coordinated transmission mode field in the coordinated transmission notification frame shown in FIG. 22 .
  • FIG. 24 is a schematic format diagram of the C-BF parameter field in the coordinated transmission notification frame shown in FIG. 22 .
  • FIG. 25 is a schematic interaction diagram in which a shared AP calculates a steering matrix through a master AP and the shared AP notifies the steering matrix according to an embodiment of the present application.
  • FIG. 26 is a schematic interaction diagram of another shared AP calculating a steering matrix through a master AP and notifying the steering matrix from the shared AP provided by an embodiment of the present application.
  • FIG. 27 is a schematic interaction diagram in which a shared AP calculates a steering matrix through a master AP and does not notify the steering matrix in the preparation stage provided by an embodiment of the present application.
  • FIG. 28 is a schematic interaction diagram of another shared AP calculating a steering matrix through the master AP and not notifying the steering matrix in the preparation stage provided by an embodiment of the present application.
  • FIG. 29 is a schematic interaction diagram in which a shared AP calculates a steering matrix through a master AP and the shared AP notifies the steering matrix in a cooperative transmission phase provided by an embodiment of the present application.
  • FIG. 30 is another schematic interaction diagram in which a shared AP calculates a steering matrix through a master AP and the shared AP notifies the steering matrix in a cooperative transmission phase provided by an embodiment of the present application.
  • FIG. 31 is a schematic interaction diagram in which a shared AP calculates a steering matrix through a master AP and the master AP notifies the steering matrix in a cooperative transmission phase provided by an embodiment of the present application.
  • FIG. 32 is a schematic interaction diagram of another shared AP calculating the steering matrix through the master AP and notifying the steering matrix during the coordinated transmission phase by the master AP provided by the embodiment of the present application.
  • Fig. 33 is a schematic format diagram of a coordinated transmission matrix request frame provided by an embodiment of the present application.
  • Fig. 34 is a schematic format diagram of a coordinated transmission matrix response frame provided by an embodiment of the present application.
  • FIG. 35 and FIG. 36 are schematic interaction diagrams for transmitting CSI information through a wired backhaul provided by an embodiment of the present application.
  • Fig. 37 is a schematic block diagram of an access point device provided by an embodiment of the present application.
  • Fig. 38 is a schematic block diagram of another access point device provided by an embodiment of the present application.
  • Fig. 39 is a schematic block diagram of a master access point device provided by an embodiment of the present application.
  • Fig. 40 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • Fig. 41 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • Fig. 42 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 , 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 the 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 acquires target channel state information CSI.
  • 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, and the APs in the multi-AP cooperative set that do not participate in C-BF are recorded as the second type
  • the STAs that participate in the C-BF are recorded as the first type STAs
  • the STAs that do not participate in the C-BF are recorded as the second type STAs.
  • the target CSI includes CSI between the first type of AP and the first type of STA.
  • the target CSI includes a first type of CSI and/or a second type of CSI, where the first type of CSI includes information between the first type of AP and the first type of STA associated with the first type of AP CSI, the second type of CSI includes the CSI between the first type of AP and STAs that are not associated with the first type of AP, for example, the first type of the first type of AP and the OBSS of the first type of AP CSI between STAs.
  • the target CSI is used to calculate a steering matrix (steering matrix) corresponding to each first-type AP in the multi-AP cooperative set, and the steering matrix corresponding to the first-type AP is used for the The first type of APs performs multi-AP cooperative transmission in C-BF mode.
  • the target CSI can be understood as the useful CSI (or effective CSI) used to calculate the steering matrix, and the CSI related to the second type of AP or the second type of STA can be considered as invalid CSI (or in other words, Invalid CSI), therefore, cooperative transmission based on the steering matrix calculated by the target CSI is beneficial to ensure that the first type of AP sends useful signals to the target STA and sends nulls (Null) to the OBSS STA to achieve effective interference suppression. Improve the SINR of the communication link.
  • the steering matrix is called a C-BF steering matrix or a transmission matrix (Tx Matrix).
  • the first AP is a shared AP (Sharing AP) in a multi-AP cooperative set.
  • the first AP is both a Sharing AP and a MAP (Controller).
  • the method 200 further includes:
  • the first AP receives first information sent by at least one second AP, where the first information is used to indicate whether the second AP participates in C-BF and/or whether the STA associated with the second AP participates in C-BF. BF.
  • the at least one second AP is a shared AP, for example, the at least one second AP includes all shared APs in the multi-AP cooperative set.
  • the shared AP can obtain target information according to the first information reported by all shared APs and the participation of the shared AP and its associated STAs in C-BF, and the target information is used to indicate the multi-AP cooperative set Participation of the APs in the C-BF mode for the multi-AP coordinated transmission and/or the participation of the station STAs associated with the APs in the multi-AP cooperation set for the C-BF multi-AP coordinated transmission.
  • the method 200 further includes:
  • the first AP receives the first CSI sent by at least one third AP.
  • the at least one third AP is a shared AP.
  • the at least one third AP includes a shared AP participating in C-BF in the multi-AP cooperation set.
  • the at least one third AP includes APs participating in C-BF among the at least one second AP.
  • the at least one third AP includes all shared APs in the multi-AP cooperative set.
  • the first type of APs may report the CSI to the shared APs, or it may also be that all the shared APs (including the first type of APs and the second type of APs) report the CSI to the shared APs.
  • the information composition of the first CSI may be one of the following situations:
  • the first CSI includes the first type of CSI obtained by the shared AP through channel detection and/or between the shared AP and the OBSS STA (including OBSS STAs participating in C-BF and OBSS STAs not participating in C-BF) CSI;
  • the first CSI includes the first type of CSI and/or the second type of CSI obtained by the shared AP through channel detection;
  • the first CSI includes all CSI obtained by the shared AP through channel detection.
  • the sharing AP can transmit the first CSI to the sharing AP through the wired connection.
  • the shared AP may transmit all the CSI obtained through the channel detection to the shared AP through a wired connection.
  • the sharing AP may send the first CSI to the sharing AP through signaling.
  • the CSI used to determine the target CSI is recorded as candidate CSI, and when the shared AP participates in C-BF, the candidate CSI includes the CSI from each of the at least one third AP The first CSI obtained by the third AP and the CSI obtained by the shared AP through channel detection, or, when the shared AP does not participate in C-BF, the candidate CSI includes each of the at least one third AP The first CSI obtained by the third AP.
  • the target CSI is determined by the shared AP in the candidate CSI according to target information.
  • the sharing AP may determine the target CSI among the candidate CSIs according to target information.
  • the shared AP removes the following invalid CSI from the candidate CSI according to the target information to obtain the target CSI:
  • the CSI obtained by the AP may be obtained by the AP in the channel detection phase.
  • the embodiment of the present application does not limit the specific channel detection process.
  • Figure 5 may be used Channel sounding is performed in the manner shown, but the application is not limited thereto.
  • the APs in the multi-AP cooperative set save the CSI obtained through channel detection.
  • the first CSI obtained by the shared AP from the shared AP may be the latest channel obtained during the detection phase.
  • the CSI saved by the AP may include the CSI between the AP and the associated STA and the CSI between the AP and a non-associated STA (such as an OBSS STA), where the associated STA refers to the STA associated with the AP, and the OBSS STA refers to the STA associated with the AP. STA in the OBSS of the AP.
  • a non-associated STA such as an OBSS STA
  • the first information and the first CSI may be transmitted by the shared AP through the same Frame sent, or, can also be sent by different frames.
  • the first CSI when the first CSI includes the first type of CSI and the second type of CSI obtained by the shared AP through channel detection, the first type of CSI and the second type of CSI may be sent in the same frame , or, may also be sent in different frames.
  • the shared AP may collect the first type of CSI and the second type of CSI obtained by the shared AP at one time, or may collect the first type of CSI and the second type of CSI obtained by the shared AP in steps.
  • the shared AP may only send the first information to the shared AP without sending the first CSI.
  • the shared AP may send the first information and the first CSI to the shared AP.
  • the method 200 further includes:
  • the first AP sends a first request frame to at least one second AP, where the first request frame is used to request the at least one second AP to participate in multi-AP coordinated transmission in the C-BF mode.
  • the at least one second AP may be a shared AP.
  • the at least one second AP includes all shared APs in the multi-AP cooperative set.
  • the first request 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 first request frame is sent by broadcast, multicast or unicast.
  • the at least one shared AP may receive the first request frame synchronously or asynchronously.
  • the shared AP when the first request frame indicates a request to participate in multi-AP cooperative transmission in C-BF mode, it can be considered that the shared AP requests the shared AP to report that the shared AP and its associated STA are important to C-BF. -BF's involvement.
  • the shared AP when the first request frame indicates a request to participate in multi-AP coordinated transmission in C-BF mode, by default the shared AP requests the shared AP to feed back CSI.
  • the first request frame may also be used to indicate whether the sharing AP requests the shared AP to feed back CSI.
  • the shared AP can report all the CSI obtained by the shared AP, or report the first type of CSI obtained by the shared AP feedback and the shared AP and all OBSS STAs (including For the CSI between the OBSS STA participating in C-BF and the OBSS STA not participating in C-BF), if the shared AP does not request to feedback CSI, the shared AP may not feed back CSI.
  • the default feedback is the first type of CSI obtained by the shared AP and the shared AP and all OBSS STAs (including those participating in C-BF) CSI between OBSS STA and OBSS STA not participating in C-BF).
  • the first request frame may also be used to indicate the type of CSI that the shared AP requests to be fed back by the shared AP.
  • the first request frame is used to indicate whether to request the first type of CSI obtained by the shared AP feedback and/or the shared AP and all OBSS STAs (including OBSS STAs participating in C-BF and OBSS STAs not participating in C-BF CSI between STA).
  • the first request frame is used to indicate whether to request the first type of CSI and/or the second type of CSI obtained through feedback from the shared AP.
  • composition of the first request frame requesting information fed back by the shared AP may be implemented in the following ways:
  • Feedback mode 1 information about the participation of the shared AP and its associated STAs in C-BF (corresponding to the aforementioned first information);
  • Feedback method 2 The participation information of the shared AP and its associated STAs in C-BF and the CSI obtained by the shared AP (that is, all CSI);
  • Feedback method 3 The participation information of the shared AP and its associated STAs in C-BF and the first type of CSI obtained by the shared AP;
  • Feedback method 4 The participation information of the shared AP and its associated STAs in C-BF, the first type of CSI obtained by the shared AP, and the shared AP and non-associated OBSS STAs (including OBSS STAs participating in C-BF and CSI between OBSS STAs not participating in C-BF.
  • the first request frame includes at least one of the following information:
  • the first indication information is used to indicate the coordinated transmission mode that is requested to be used by the first AP;
  • the second indication information is used to indicate whether to feed back the first type of CSI obtained by the second AP;
  • the third indication information is used to indicate whether to feed back the CSI between the second AP obtained by the second AP and the unassociated OBSS STA.
  • the first indication information is used to indicate a request to participate in multi-AP coordinated transmission in the C-BF mode.
  • the shared AP when the first indication information indicates a request to participate in multi-AP coordinated transmission in the C-BF mode, it may be considered that the shared AP requests the shared AP to report that the shared AP and its associated STA are important to the C-BF mode. -BF's involvement.
  • the shared AP may respectively indicate the type of CSI fed back by the shared AP through independent indication information.
  • the second indication information corresponds to 1 bit
  • the third indication information corresponds to another 1 bit.
  • the value of 1 bit corresponding to the second indication information is used to indicate whether to feed back the first type of CSI obtained by the second AP.
  • the third indication information corresponds to The 1-bit value of is used to indicate whether to feed back the CSI obtained by the second AP between the second AP and the non-associated OBSS STA.
  • a value of 1 indicates feedback
  • a value of 0 indicates no feedback.
  • the shared AP may use an indication message to indicate whether the shared AP feeds back the first type of CSI obtained by the second AP and the CSI obtained by the second AP between the second AP and the non-associated OBSS STA .
  • the type of CSI to be fed back is indicated through different values of the indication information.
  • the indication information corresponds to 2 bits.
  • the value of 00 indicates that no CSI is fed back
  • the value of 01 indicates that the first type of CSI obtained by the second AP is fed back
  • the value of 10 indicates that the second AP and the second AP obtained by the feedback are fed back.
  • a value of 11 indicates that the first type of CSI obtained by the second AP is fed back and the CSI between the second AP and non-associated OBSS STAs obtained by the second AP.
  • the method 200 further includes:
  • the first AP receives a first response frame sent by the at least one second AP, where the first response frame is used to indicate whether the second AP accepts participation in multi-AP coordinated transmission in the C-BF mode.
  • the first response frame is sent synchronously or asynchronously by the at least one second AP.
  • the first AP receives the first response frame synchronously sent by the at least one second AP.
  • the first AP when the first request frame is sent in a unicast manner, the first AP receives the first response frame asynchronously sent by the at least one second AP.
  • the first response frame is also called a Coordinated Transmission Response (Coordinated TX Response) frame, or other similar names, which is not limited in this application.
  • Coordinated TX Response Coordinated TX Response
  • the first response frame includes the first information but does not include the first CSI.
  • the first response frame only indicates the participation of the shared AP and its associated STAs in the C-BF, and does not indicate CSI information.
  • the first information may not include participation information of STAs associated with the shared AP, which means that all STAs associated with the shared AP do not participate in C-BF.
  • the first information may include participation information of STAs associated with the shared AP.
  • the first information may not indicate the participation information of the STAs associated with the shared AP, which means that all STAs associated with the shared AP participate in C-BF. C-BF.
  • the first information may directly indicate the first-type STA set and/or the second-type STA set corresponding to the shared AP.
  • the first 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), and the list of STAs participating in C-BF It is used to indicate the first type of STAs associated with the shared AP, and the list of STAs not participating in C-BF is used to indicate the second type of STAs associated with the shared AP.
  • the first information may explicitly indicate the ID of the STA participating in the C-BF associated with the shared AP, or the ID of the STA not participating in the C-BF.
  • the first information may indicate the first-type STA set and/or the second-type STA set corresponding to the shared AP in a bitmap (bitmap) manner.
  • the first information includes an associated STA list and a C-BF bitmap
  • the associated STA list is used to indicate all STAs associated with the shared AP
  • the C-BF bitmap includes K bits, and each bit corresponds to an associated STA A STA in the list, for example, the first bit corresponds to the first STA in the associated STA list, the second bit corresponds to the second STA in the associated STA list, etc.
  • the value of each bit is used to indicate the corresponding STA Whether to participate in C-BF, where K is the number of STAs included in the associated STA list, and K is a positive integer.
  • the first information may not include the list of associated STAs, and only need to include the C-BF bitmap, as long as the sharing AP and the shared AP have a corresponding C-BF bitmap
  • the understanding of the corresponding relationship between each bit in the figure and the STA should be the same.
  • the shared AP may report the CSI according to an instruction of the shared AP.
  • the first request frame indicates that the shared AP reports the CSI between the shared AP and the associated first-type STA and the CSI between the shared AP and the OBSS STA (corresponding to the aforementioned feedback method 4)
  • the first The response frame may include CSI between the sharing AP and the associated first type STA and CSI between the shared AP and the OBSS STA.
  • the first response frame may include the shared AP and the associated first-type STA.
  • the first response frame may not include CSI information.
  • the shared AP may not report the CSI, or may also report all the obtained CSI (that is, use the aforementioned feedback mode 2 to report), or, only report The first type of CSI obtained (that is, report by using the aforementioned feedback method 3), or report the obtained first type of CSI and the CSI between the shared AP and the OBSS STA (that is, use the aforementioned feedback method 4 to report).
  • the first response frame may include the first information and part or all of the first CSI.
  • the first response frame may be used to indicate the participation of the shared AP and its associated STAs in the C-BF, and may also be used to indicate part or all of the first CSI.
  • the first CSI may be sent in one frame, or may be sent in multiple frames.
  • the first response frame may include first information and the first type of CSI obtained by the shared AP.
  • the first response frame may include the first information and the first type of CSI obtained by the shared AP and the CSI between the second AP and the non-associated OBSS STA.
  • the first response frame may include the first information and all CSI obtained by the shared AP.
  • the first response frame includes at least one of the following information:
  • the fourth indication information is used to indicate whether the second AP accepts the requested coordinated transmission mode
  • a list of associated STAs participating in C-BF including STAs associated with the second AP participating in multi-AP coordinated transmission in C-BF mode;
  • a list of associated STAs that do not participate in C-BF including STAs associated with the second AP that do not participate in multi-AP coordinated transmission in C-BF mode;
  • At least one CSI including the first type of CSI obtained by the second AP and/or the CSI between the second AP and an unassociated OBSS STA obtained by the second AP.
  • the first response frame it is mandatory for the first response frame to include the list of associated STAs participating in the C-BF, and it is optional for the first response frame to include the list of associated STAs not participating in the C-BF.
  • the first response frame when the fourth indication information is used to instruct the second AP to accept coordinated transmission in C-BF mode, the first response frame includes the associated STA list participating in C-BF, or , including a list of associated STAs participating in the C-BF and at least one CSI. Optionally, it may also include a list of associated STAs that do not participate in the C-BF.
  • the first response frame may not include the list of associated STAs participating in C-BF and the list of associated STAs not participating in C-BF and at least one CSI, means that all STAs associated with the shared AP do not participate in C-BF.
  • the first response frame may include a list of associated STAs participating in C-BF and /or a list of associated STAs that do not participate in C-BF, that is, do not include CSI information.
  • the first response frame may include A list of associated STAs participating in the C-BF and/or a list of associated STAs not participating in the C-BF, and the first type of CSI obtained by the second AP.
  • the first request frame indicates feedback of the first type of CSI obtained by the second AP and the second AP obtained by the second AP and For CSI between non-associated OBSS STAs, the first response frame may include a list of associated STAs participating in C-BF and/or a list of associated STAs not participating in C-BF, and the first type of CSI obtained by the second AP and the CSI between the second AP and the non-associated OBSS STA.
  • the above only uses the first response frame to indicate the participation of STAs in C-BF by indicating the list of STAs participating in C-BF and/or the list of STAs not participating in C-BF.
  • the STA's participation in the C-BF may also be indicated in a bitmap manner, which is not limited in this application.
  • the first response frame includes at least one of the following information:
  • the fourth indication information is used to indicate whether the second AP accepts the requested coordinated transmission mode
  • An associated STA list including all STAs associated with the second AP
  • the C-BF bitmap is used to indicate the STAs associated with the second AP participating in C-BF and/or not participating in C-BF;
  • At least one CSI including the first type of CSI obtained by the second AP and/or the CSI between the second AP and an unassociated OBSS STA obtained by the second AP.
  • the method 200 further includes:
  • the first AP sends a second request frame to at least one third AP in the multi-AP cooperation set, where the second request frame is used to request the third AP to feed back CSI information.
  • the shared AP in the first request frame, only the shared AP is requested to feed back the first information (corresponding to the aforementioned feedback method 1), and the shared AP may request the shared AP to feed back the first type of CSI and CSI between shared AP and non-associated OBSS STA.
  • the shared AP may request the shared AP to feed back its relationship with the non-associated CSI through the second request frame.
  • the second request frame is called a CSI request frame, or other similar names may be used, which is not limited in this application.
  • the at least one third AP may be an AP participating in C-BF among the at least one second AP.
  • the second request frame is sent by broadcast, multicast or unicast.
  • the at least one third AP receives the second request frame synchronously or asynchronously.
  • the aforementioned target information may be carried in the second request frame.
  • the target information is obtained by the shared AP based on the first information carried in the first response frame sent by the shared AP.
  • the shared AP may notify the participation of the AP in the multi-AP cooperative set participating in the C-BF to the C-BF and/or the participation of the STA associated with the AP to the C-BF through the second request frame.
  • the third AP participating in the C-BF may eliminate invalid CSI in the pre-stored CSI according to the target information, and only feed back valid CSI.
  • the target information may be used to indicate at least one of the following information:
  • At least one AP including a first type of AP in the multi-AP cooperative set, and/or, a second type of AP in the multi-AP cooperative set;
  • each STA set corresponds to a first-type AP, and the STA set includes the first-type STAs of the corresponding first-type AP-associated STAs, and/or, the corresponding first-type AP-associated STAs The second type of STA.
  • 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 STA is the first-type STAs associated with the first-type AP and/or the first-type STAs associated with the first-type AP.
  • 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 target information only indicates at least one AP of the first type.
  • all STAs associated with the at least one first-type AP participate in C-BF, and all other APs in the multi-AP cooperative set except the at least one first-type AP is a second-type AP, and all STAs associated with the second-type AP are second-type STAs.
  • the target information may only indicate the participating The C-BF AP does not need to indicate the participation of its associated STA.
  • Case 2 the target information only indicates at least one AP of the second type.
  • all STAs associated with the at least one second-type AP do not participate in C-BF, and other APs in the multi-AP cooperative set except the at least one second-type AP All are first-type APs, and all STAs associated with the first-type APs are first-type STAs.
  • the target information may only indicate that it does not participate C-BF's AP.
  • Case 3 the target 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 numbers of the first type of APs and the first type of STA sets may be different, for example, the number of first type APs is greater than the number of the first type of STA sets.
  • 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 target 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 If the STA associated with the first-type AP 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 target information may directly indicate at least one first-type AP and/or at least one second-type AP.
  • the target information includes the ID of at least one AP of the first type, or the ID of at least one AP of the second type.
  • 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 target information may indicate at least one first-type AP and/or at least one second-type AP in a bitmap (bitmap) manner.
  • the target 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 cooperative set
  • the first bit corresponds to the multi-AP cooperative set
  • the first AP in
  • the second bit corresponds to the second AP in the multi-AP cooperative set, etc.
  • the value of each bit is used to indicate whether the corresponding AP participates in C-BF, where N is the multi-AP cooperative set
  • the number of included APs, N is a positive integer greater than 1.
  • the target information may not include the IDs of the APs in the multi-AP cooperating set, and only need to include the first C- For the 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 target 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 target 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 C-BF -
  • the BF STA list corresponds to a first-type AP
  • 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 first-type AP associated with the corresponding first-type AP
  • a type of STA the STA list 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 target information may indicate at least one first-type STA set and/or at least one second-type STA set in a bitmap (bitmap) manner.
  • the target 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,
  • 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,
  • 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 for Indicates 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 target information may not include the at least one associated STA list, and only needs to include at least one For the 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 second request frame includes at least one of the following information:
  • fifth indication information where the fifth indication information is used to instruct the third AP to feed back the first type of CSI and/or the second type of CSI;
  • AP number information used to indicate the number of APs included in the second request frame
  • An AP list including APs participating in multi-AP cooperative transmission in C-BF mode and/or APs not participating in multi-AP cooperative transmission in C-BF mode in the multi-AP cooperative set;
  • At least one associated STA list participating in C-BF At least one associated STA list participating in C-BF.
  • Each associated STA list participating in C-BF corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode.
  • the associated STA list participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in the multi-AP cooperative transmission in the C-BF mode;
  • At least one associated STA list that does not participate in C-BF each associated STA list that does not participate in C-BF corresponds to an AP that participates in multi-AP coordinated transmission in C-BF mode, and the associated STA list 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 second request frame includes at least one of the following information:
  • fifth indication information where the fifth indication information is used to instruct the third AP to feed back the first type of CSI and/or the second type of CSI;
  • AP number information used to indicate the number of APs included in the second request frame
  • An AP list including APs participating in multi-AP cooperative transmission in C-BF mode and/or APs not participating in multi-AP cooperative transmission in C-BF mode in the multi-AP cooperative set;
  • each associated STA list corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode, and the associated STA list is used to indicate the STA associated with the corresponding AP;
  • each second C-BF bitmap corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode
  • the second C-BF bitmap is used to indicate the corresponding AP's Associate the STAs in the STA list that participate in the multi-AP coordinated transmission in the C-BF mode and/or the STAs that do not participate in the multi-AP coordinated transmission in the C-BF mode.
  • the fifth indication information may be 1 bit, and different values of the 1 bit are used to indicate the type of CSI to be fed back. For example, a value of 0 indicates that the second type of CSI is fed back, and a value of 1 indicates that the first type of CSI is fed back.
  • Class CSI and second class CSI are used to indicate the type of CSI to be fed back.
  • the AP list includes a list of APs participating in C-BF, or includes a list of APs participating in C-BF and a list of APs not participating in C-BF.
  • the second request frame it is mandatory for the second request frame to include the list of APs participating in the C-BF, and it is optional for the second request frame to include the list of APs not participating in the C-BF.
  • the method 200 further includes:
  • the first AP receives a second response frame sent by the at least one third AP, where the second response frame includes the CSI information fed back by the third AP.
  • the second response frame may be called a CSI report frame or a CSI response frame, or may use other similar names, which are not limited in this application.
  • the second response frame is sent synchronously or asynchronously by the at least one third AP.
  • the first AP receives the second response frame synchronously sent by the at least one third AP.
  • the first AP receives the second response frame asynchronously sent by the at least one third AP.
  • the second response frame includes the first type of CSI obtained by the third AP and/or the second type of CSI obtained by the third AP. That is, the third AP only feeds back effective CSI.
  • the third AP may remove invalid CSI from the prestored CSI according to the target information, and further include only valid CSI in the second response frame.
  • the first response frame does not include CSI information
  • the second response frame includes the first type of CSI obtained by the third AP and the second type of CSI obtained by the third AP.
  • the first response frame includes the first type of CSI obtained by the third AP
  • the second response frame includes the second type of CSI obtained by the third AP
  • the shared AP acquires the first CSI from the shared AP as follows:
  • Acquisition mode 1 Acquired from the first response frame, wherein the first response frame may include the first type of CSI obtained by the shared AP and the CSI between the shared AP and the non-associated OBSS STA;
  • Acquisition method 2 Obtain from the first response frame and the second response frame, where the first response frame may include the first type of CSI obtained by the shared AP, and the second response frame may include its and non-associated participation information obtained by the shared AP
  • the CSI between OBSS STAs of C-BF is to obtain the first type of CSI from the first response frame, and obtain the second type of CSI from the second response frame.
  • Obtaining manner 3 obtaining from the second response frame, where the second response frame may include the first type of CSI and the second type of CSI obtained by the shared AP. In this case, the first response frame does not include CSI information.
  • the sharing AP may obtain the candidate CSI according to the first CSI acquired from the shared AP, and further, may perform processing of eliminating invalid CSI on the candidate CSI according to the target information to obtain the target CSI.
  • the shared AP removes the following invalid CSI from the candidate CSI according to the target information to obtain the target CSI:
  • the method 200 further includes:
  • the first AP determines a steering matrix corresponding to each AP of the first type according to the target CSI.
  • the sharing AP can obtain the first CSI from the shared AP, and further remove invalid CSI processing based on the obtained first CSI according to the target information to obtain the target CSI, and then the sharing AP can determine the C-BF participants based on the target CSI.
  • the steering matrix corresponding to AP That is to say, when the shared AP calculates the steering matrix, it only considers the CSI between the first type of AP and the first type of STA, so that the cooperative transmission can be performed based on the calculated steering matrix, and the AP can send useful signals to the target STA with zero trap transmission. For OBSS STA, the interference is reduced and the transmission performance is improved.
  • the method 200 further includes:
  • the first AP sends a steering matrix corresponding to each first-type AP to each first-type AP in the multi-AP cooperation set.
  • the shared AP can transmit the steering matrix corresponding to the shared AP participating in the C-BF to the shared AP through the wired connection.
  • the sharing AP may transmit the steering matrix corresponding to the shared AP participating in the C-BF to the shared AP through signaling.
  • the steering matrix corresponding to the first type of APs may be sent through a first notification frame.
  • the first notification frame is called a coordinated transmission notification (Coordinated TX Announce) frame, or uses other similar names, which is not limited in this application.
  • the first notification frame is sent by broadcast or multicast, and the first notification frame includes a steering matrix corresponding to each AP of the first type.
  • the first notification frame is sent through unicast, and the first notification frame may include a steering matrix corresponding to a single AP of the first type.
  • FIG. 7 and FIG. 8 are schematic interaction diagrams of the sharing AP collecting CSI information obtained by the shared AP step by step
  • FIG. 9 and FIG. 10 are schematic interaction diagrams of the sharing AP collecting the CSI information obtained by the shared AP once.
  • Figure 7 and Figure 8 are schematic diagrams of the shared AP's synchronous and asynchronous responses when the shared AP collects the CSI information obtained by the shared AP step by step
  • Figure 9 and Figure 10 are respectively the shared AP's collection of CSI information obtained by the shared AP Schematic diagram of the synchronous and asynchronous responses of the shared AP when the CSI information is shared.
  • the shared AP sends a cooperative transmission request frame to the shared AP, 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 multi-AP cooperative transmission of the C-BF mode.
  • the AP coordinates the transmission, and at the same time indicates the first type of CSI that is fed back by the shared AP.
  • the shared AP After receiving the coordinated transmission request frame, the shared AP synchronously replies with a coordinated transmission response frame.
  • AP m replies with a coordinated transmission response frame to indicate acceptance of the shared AP request, and the AP m may also indicate in the coordinated transmission response frame that the AP m and its associated STAs participate in C-BF, and the AP m obtains CSI between AP m and associated STAs participating in C-BF. That is, the AP m can feed back the first information and the obtained first type of CSI.
  • AP n replies with a cooperative transmission response frame indicating that the request to share the AP is rejected.
  • the AP n may not indicate the participation of the STA associated with the AP n in the C-BF in the cooperative transmission response frame, because the AP n All associated STAs do not participate in C-BF.
  • AP n also does not report the obtained CSI in the cooperative transmission response frame.
  • the shared AP sends a CSI request frame to the shared AP participating in the C-BF (for example, AP m) to request the AP participating in the C-BF to feed back the second type of CSI.
  • the CSI request frame may also indicate that AP n does not participate in C-BF.
  • AP m After AP m receives the CSI request frame, it replies with a CSI report frame, which carries the CSI obtained by AP m and its associated OBSS STA participating in C-BF (that is, the second type of CSI).
  • the CSI carried in the report frame does not include the CSI between the STAs associated with AP m and AP n.
  • the shared AP can obtain the CSI and target information reported by the shared AP. Further, the shared AP can determine the target CSI based on the above information, and determine the steering matrix corresponding to the AP participating in C-BF according to the target CSI. For example, according to the first type of CSI and the second type of CSI obtained by AP m, the steering matrix corresponding to AP m is determined.
  • the shared AP may send a coordinated transmission notification frame to inform the shared AP participating in the C-BF of the steering matrix corresponding to the shared AP participating in the C-BF.
  • the shared AP sends a coordinated transmission notification frame to AP m, indicating the steering matrix corresponding to AP m.
  • the shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the shared AP through an acknowledgment (Ack) frame, and the shared AP can also not send an Ack frame, and accept the cooperative transmission notification sent by the shared AP by default. frame.
  • Ack acknowledgment
  • the shared 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 the shared AP whether to participate in the C-BF mode.
  • the multi-AP cooperative transmission in BF mode also instructs the shared AP to feed back the first type of CSI, and the shared AP can asynchronously reply the cooperative transmission response frame.
  • AP m replies with a cooperative transmission response frame, indicating acceptance of the shared AP's request, and the AP m can also indicate in the cooperative transmission response frame that the AP m and its associated STAs are Participation in C-BF and first class CSI obtained by said AP m. That is, the AP m can feed back the first information and the obtained first type of CSI.
  • AP n replies with a cooperative transmission response frame, indicating that the request of the shared AP is rejected. STA's participation in C-BF, because all STAs associated with this AP n do not participate in C-BF. And AP n also does not report the obtained CSI in the cooperative transmission response frame.
  • the shared AP sends a CSI request frame to the shared AP participating in the C-BF (for example, AP m) to request the AP participating in the C-BF to feed back the second type of CSI.
  • the CSI request frame may also indicate that AP n does not participate in C-BF.
  • AP m After AP m receives the CSI request frame, it replies with a CSI report frame, which carries the CSI obtained by AP m and its associated OBSS STA participating in C-BF (that is, the second type of CSI).
  • the CSI carried in the report frame does not include the CSI between the STAs associated with AP m and AP n.
  • the shared AP can obtain the CSI and target information reported by the shared AP. Further, the shared AP can determine the target CSI based on the above information, and determine the steering matrix corresponding to the AP participating in C-BF according to the target CSI. For example, according to the first type of CSI and the second type of CSI obtained by AP m, the steering matrix corresponding to AP m is determined.
  • the shared AP may send a coordinated transmission notification frame to inform the shared AP participating in the C-BF of the steering matrix corresponding to the shared AP participating in the C-BF.
  • the shared AP sends a coordinated transmission notification frame to AP m, indicating the steering matrix corresponding to AP m.
  • the shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the shared AP through an acknowledgment (Ack) frame, and the shared AP can also not send an Ack frame, and accept the cooperative transmission notification sent by the shared AP by default. frame.
  • Ack acknowledgment
  • the shared AP can send a cooperative transmission request frame to the shared AP to request the shared AP to participate in multi-AP cooperative transmission in the C-BF mode, or to ask the shared AP whether to participate in the C-BF mode Multi-AP cooperative transmission, simultaneously indicating the first type of CSI obtained by the feedback of the shared AP and the CSI between the shared AP and the non-associated OBSS STA.
  • the shared AP After receiving the coordinated transmission request frame, the shared AP synchronously replies with a coordinated transmission response frame.
  • AP m replies with a cooperative transmission response frame, indicating that it accepts the request for sharing the AP.
  • the AP m may also indicate in the cooperative transmission response frame that the AP m and its associated STAs participate in C-BF and that the AP m obtains The first type of CSI and the CSI between the shared AP and the non-associated OBSS STA.
  • AP n replies with a cooperative transmission response frame, indicating that the request to share the AP is rejected.
  • the AP n may not indicate the participation of the STA associated with the AP n in the C-BF in the cooperative transmission response frame, because the AP All STAs associated with n do not participate in C-BF.
  • AP n also does not report the CSI it obtains in the coordinated transmission response frame.
  • the shared AP can obtain the CSI and target information reported by the shared AP. Further, the shared AP can determine the target CSI based on the above information, and determine the steering matrix corresponding to the AP participating in C-BF according to the target CSI. For example, according to the first type of CSI and the second type of CSI obtained by AP m, the steering matrix corresponding to AP m is determined.
  • the shared AP may send a coordinated transmission notification frame to inform the shared AP participating in the C-BF of the steering matrix corresponding to the shared AP participating in the C-BF.
  • the shared AP sends a coordinated transmission notification frame to AP m, indicating the steering matrix corresponding to AP m.
  • the shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the shared AP through an acknowledgment (Ack) frame, and the shared AP can also not send an Ack frame, and accept the cooperative transmission notification sent by the shared AP by default. frame.
  • Ack acknowledgment
  • the shared 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 the shared AP whether to participate in the C-BF mode.
  • the multi-AP cooperative transmission in BF mode simultaneously indicates the first type of CSI obtained by the feedback of the shared AP and the CSI between the shared AP and the OBSS STA, and the shared AP can asynchronously reply the cooperative transmission response frame.
  • AP m replies with a cooperative transmission response frame, indicating acceptance of the shared AP's request, and the AP m can also indicate in the cooperative transmission response frame that the AP m and its associated STAs are The participation of C-BF and the first type of CSI obtained by the AP m and the CSI between the shared AP and the non-associated OBSS STA.
  • AP n replies with a cooperative transmission response frame, indicating that the request of the shared AP is rejected. STA's participation in C-BF, because all STAs associated with AP n do not participate in C-BF, and AP n does not report its obtained CSI in the coordinated transmission response frame.
  • the shared AP can obtain the CSI and target information reported by the shared AP. Further, the shared AP can determine the target CSI based on the above information, and determine the steering matrix corresponding to the AP participating in C-BF according to the target CSI. For example, according to the first type of CSI and the second type of CSI obtained by AP m, the steering matrix corresponding to AP m is determined.
  • the shared AP may send a coordinated transmission notification frame to inform the shared AP participating in the C-BF of the steering matrix corresponding to the shared AP participating in the C-BF.
  • the shared AP sends a coordinated transmission notification frame to AP m, indicating the steering matrix corresponding to AP m.
  • the shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the shared AP through an acknowledgment (Ack) frame, and the shared AP can also not send an Ack frame, and accept the cooperative transmission notification sent by the shared AP by default. frame.
  • Ack acknowledgment
  • AP1 is the MAP
  • AP m and AP n are SAPs in the multi-AP cooperative set.
  • STA 1-i Associated with AP 1
  • STA m-i associated with AP m STA n-i associated with AP n
  • i represents the i-th STA associated with the 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 shared AP sends the cooperative transmission request frame, for example, it may be sent by broadcast or multicast, or it may be sent by unicast.
  • the shared AP replies with a coordinated transmission response frame, for example, synchronously or asynchronously replies with a coordinated transmission response.
  • the shared AP may also send a CSI request frame (not shown in FIG. 11 ), for example, it may send it in a broadcast or multicast manner, or it may also send it in a unicast manner.
  • the Shared AP replies to the CSI report frame, for example, synchronously or asynchronously.
  • CSI request frame (not shown in FIG. 11 )
  • the Shared AP replies to the CSI report frame, for example, synchronously or asynchronously.
  • Embodiment 1 The preparation stage does not include the interaction of the CSI request frame and the CSI report frame, and the CSI is acquired through the cooperative transmission response frame, which corresponds to the aforementioned acquisition method 1.
  • the CSI request frame and the CSI report frame The preparation stage does not include the interaction of the CSI request frame and the CSI report frame, and the CSI is acquired through the cooperative transmission response frame, which corresponds to the aforementioned acquisition method 1.
  • the CSI is acquired through the cooperative transmission response frame, which corresponds to the aforementioned acquisition method 1.
  • the shared AP participates in C-BF, the following information is carried in the coordinated transmission response frame:
  • a list of STAs associated with the shared AP (optional);
  • the CSI between the shared AP and the associated STA participating in C-BF (that is, the CSI between the Shared AP and its associated STA not participating in C-BF is removed;
  • the shared AP does not participate in C-BF, the following information is carried in the coordinated transmission response frame:
  • the shared AP calculates a steering matrix corresponding to each AP participating in the C-BF based on the above-mentioned collected CSI.
  • a shared AP collects the following information:
  • the CSI between AP 1 and STA m-i namely H(1,m-i)
  • the CSI between AP 1 and STA n-i namely H(1,n-i);
  • the CSI between AP m and STA 1-i namely H(m,1-i)
  • the CSI between AP m and STA n-i namely H(m,n-i).
  • the shared AP when it calculates the steering matrix corresponding to AP 1, it can use the CSI information (H(1,1-i) and H(1,m-i)) to calculate the C-BF steering matrix corresponding to AP 1, and the shared AP is in When calculating the steering matrix corresponding to AP m, the CSI information (H(m,1-i) and H(m,m-i)) can be used to calculate the C-BF steering matrix corresponding to AP m.
  • Embodiment 2 The preparation stage includes the interaction of the CSI request frame and the CSI report frame, and the CSI is obtained through the cooperative transmission response frame and the CSI report frame, which corresponds to the aforementioned acquisition method 2.
  • the CSI request frame and the CSI report frame For specific interaction modes, refer to the relevant descriptions in FIG. 7 and FIG. 8 .
  • the shared AP participates in C-BF, the following information is carried in the coordinated transmission response frame:
  • a list of STAs associated with the shared AP (optional);
  • the CSI between the shared AP and the associated STA that participates in the C-BF (that is, the CSI between the shared AP and the associated STA that does not participate in the C-BF is excluded, that is, the first type of CSI.
  • the shared AP does not participate in C-BF, the following information is carried in the coordinated transmission response frame:
  • the shared AP can send a CSI Request frame to the shared AP participating in the C-BF, requesting the shared AP to report the CSI between the AP and the OBSS STA participating in the C-BF (that is, the second type of CSI).
  • the CSI Request frame can also carry target information.
  • the shared AP replies a CSI Report to the sharing AP, wherein the CSI Report frame carries the CSI between the shared AP and the OBSS STA participating in C-BF. That is, the shared AP will delete the CSI between it and the OBSS STA that does not participate in C-BF.
  • the shared AP calculates a steering matrix corresponding to each AP participating in the C-BF based on the above-mentioned collected CSI.
  • a shared AP collects the following information:
  • the shared AP calculates the steering matrix corresponding to AP 1, it can use the CSI information (H(1,1-i), H(1,m-i)) to calculate the C-BF steering matrix corresponding to AP 1, and the shared AP calculates the AP
  • the CSI information H(m,1-i), H(m,m-i)
  • the shared AP calculates the AP
  • the CSI information H(m,1-i), H(m,m-i)
  • Embodiment 3 The preparation stage includes the interaction of the CSI request frame and the CSI report frame, and the CSI is acquired through the CSI report frame, which corresponds to the aforementioned acquisition mode 3.
  • the CSI request frame and the CSI report frame corresponds to the aforementioned acquisition mode 3.
  • the difference from the second embodiment is that the cooperative transmission response frame does not include CSI information, and the CSI report frame includes the first type of CSI and the second type of CSI obtained by the AP.
  • the manner described above calculates the steering matrix corresponding to the AP participating in the C-BF.
  • the present application does not limit the method for calculating the C-BF steering matrix.
  • the principle of C-BF steering matrix calculation is to enhance the signal quality (such as SINR) of the STA participating in C-BF associated with the AP, and the non-associated STA participating in C-BF (that is, participating in C-BF under other AP The signal quality of the STA) is weakened (that is, the null trap of the transmitted signal is aimed at the non-associated STA participating in the C-BF).
  • the multi-AP cooperative transmission in the C-BF mode of the embodiment of the present application may be 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. (for example, APs and/or STAs have obvious location changes or other APs and/or STAs are newly added), then the channel state information pre-stored by the AP cannot accurately reflect the CSI information between each AP and each STA.
  • the cooperative transmission based on the steering matrix calculated by 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 pre-stored channel state information cannot accurately reflect The channel state information between each AP and each STA is displayed.
  • 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 shared AP may send the steering matrix of each participating C-BF to each shared AP participating in the C-BF through a coordinated transmission notification frame.
  • the shared 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 the C-BF sends data according to the steering matrix notified by the shared AP.
  • each STA replies with a Block Acknowledgment (Block Acknowledgment, BA) frame after receiving the data sent by the AP.
  • Block Acknowledgment BA
  • FIG. 11 only uses the same AP as an example for the MAP and the shared AP.
  • the MAP and the shared AP may also be different APs, which is not limited in the present application.
  • the shared AP may also notify each AP participating in the C-BF of the steering matrix of each participating C-BF during the coordinated transmission phase. In this case, the shared AP may not send the coordinated transmission matrix during the preparation phase.
  • the shared AP may carry the steering matrix of each participating C-BF in the coordinated transmission triggering frame, and further, the shared APs participating in the C-BF may perform data transmission according to their corresponding steering matrices. That is, the step of sending the cooperative transmission notification by the shared AP and replying (optional) by the shared AP is omitted.
  • the shared AP 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 is similar to the frame format design of the coordinated transmission notification frame.
  • FIG. 12 and FIG. 13 are schematic interaction diagrams for realizing the coordinated transmission notification frame function through the coordinated transmission trigger frame.
  • the shared AP may reply synchronously to the cooperative transmission request frame of the sharing AP
  • the shared AP may reply asynchronously to the cooperative transmission request frame of the sharing AP. It should be understood that in the preparation phase, the shared AP can collect the CSI obtained by the shared AP step by step, or collect the CSI obtained by the shared AP at one time. 7 and the interaction modes in Fig. 8 will not be repeated here.
  • the frame format design of the coordinated transmission request frame, the coordinated transmission response frame, the CSI request frame, the CSI report frame and the coordinated transmission notification frame will be described below with reference to FIG. 14 to FIG. 24 .
  • FIG. 14 is a schematic diagram of a frame format of a coordinated 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 first 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 Used Use the C-OFDMA (C-OFDMA Used) field to indicate whether to request multi-AP cooperative transmission using C-OFDMA mode
  • 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, indicating 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.
  • the C-BF command field includes at least one of the following fields:
  • Reporting the CSI (Report CSI from Associated STAs) field of the associated STA is used to indicate whether to feed back the first type of CSI obtained by the second AP, that is, to carry the aforementioned second indication information;
  • Reporting the CSI (Report CSI from OBSS STAs) field of the OBSS STA is used to indicate whether to feed back the CSI obtained by the second AP between the second AP and the non-associated OBSS STA, that is, to carry the aforementioned third indication information.
  • the Report CSI from Associated STAs field has a value of 1 indicating that the Shared AP feeds back CSI between STAs associated with it and participating in C-BF, and a value of 0 indicates that the Shared AP does not feed back its associated participating C-BF CSI between STAs.
  • the Report CSI from OBSS STAs field has a value of 1 indicating that the Shared AP feeds back CSI with non-associated OBSS STAs, and a value of 0 indicates that the Shared AP does not feed back CSI with non-associated OBSS STAs .
  • FIG. 17 to FIG. 19 are schematic diagrams of a frame format of a cooperative transmission response frame provided by an embodiment of the present application.
  • the coordinated transmission response frame may include the following domains (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 Response 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 that the second AP is related to C-BF
  • C-OFDMA Info.field used to indicate that the second AP is related to C-OFDMA
  • C-SR Info.field used to indicate the information related to the second AP and C-SR
  • J-TX Info.field used to indicate that the second AP is related to J-TX
  • the C-UL MU MIMO information field (C-UL MU-MIMO Info.field) is used to indicate the information related to the C-UL MU MIMO of the second 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 coordinated 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 coordinated transmission of the C-OFDMA mode;
  • C-SR Accept the C-SR (C-SR Accept) field, which is used to indicate whether to accept the coordinated 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 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:
  • the associated STA list field (Associated STA List for C-BF subfield) participating in C-BF is used to indicate the STA associated with the second AP participating in the multi-AP coordinated transmission of the C-BF mode;
  • the associated STA list field (Associated STA List for no C-BF subfield) that does not participate in C-BF is used to indicate the STA associated with the second AP that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • the CSI information field (CSI Information field) is used to indicate the first type of CSI obtained by the second AP and/or the CSI between the second AP and the non-associated OBSS STA obtained by the second AP.
  • the Associated STA List for C-BF subfield 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 second AP participating in the C-BF;
  • At least one STA ID field where the k th STA ID is used to indicate the ID of the kth STA associated with the second AP and participating in the C-BF.
  • the Associated STA List for no C-BF subfield 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 second AP that do not participate in C-BF;
  • At least one STA ID field wherein the dth STA ID is used to indicate the ID of the dth STA associated with the second AP that does not participate in the C-BF.
  • the cooperative transmission response frame when the value of the C-BF Accept field is 1, the cooperative transmission response frame includes the CSI Information field, and when the value of the C-BF Accept field is 0, the cooperative transmission response frame does not include the CSI Information field.
  • the coordinated transmission response frame if the value of the Report CSI from Associated STAs field of the coordinated transmission request frame is 1, the coordinated transmission response frame carries the first type of CSI obtained by the shared AP, otherwise it does not carry; if the Report CSI from OBSS STAs takes If the value is 1, the coordinated transmission response frame carries the CSI between the shared AP and the non-associated OBSS STA, otherwise it does not carry it.
  • the length x of the CSI Information field satisfies that the Coordinated TX Response frame does not exceed 11454 bytes, otherwise, the coordinated transmission response frame needs to be fragmented.
  • FIG. 20 is a schematic diagram of a frame format of a CSI 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
  • RA Receiveiving Address
  • TA Transmission Address
  • CSI Request CSI Request
  • FCS occupied 4 bytes
  • the CSI request field includes at least one of the following fields:
  • a CSI request command (CSI Request Command) field, used to indicate that the third AP is requested to feed back the first type of CSI and/or the second type of CSI;
  • the number of APs (Number of APs) field is used to indicate the number of APs included in the CSI request 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;
  • At least one associated STA information (AP's Associated STAs Info) field
  • each associated STA information field corresponds to an AP indicated by the at least one AP ID field
  • each associated STA information field is used to indicate the participation of the corresponding AP association STAs of C-BF and/or STAs not participating in C-BF.
  • the value of the CSI Request Command field is 0, indicating that the shared AP requests the shared AP to feed back the CSI between the shared AP and the OBSS STA participating in C-BF, and the value of the CSI Request Command field is 1, indicating that The shared AP requests the shared AP to feed back the CSI between the shared AP and its associated STA participating in the C-BF and the CSI between the shared AP and the OBSS STA participating in the C-BF.
  • the at least one AP ID field may include the first AP ID (1 st AP ID) field, ..., the mth AP ID (m th AP ID) field, etc.
  • the first AP ID (1 st AP ID) field indicates the ID of the first AP participating in the C-BF
  • the m th AP ID indicates the ID of the mth AP participating in the C-BF.
  • the at least one associated STA list field may include the STA information ( 1st AP's Associated STAs Info) field of the first AP, ..., the STA list associated with the mth AP (m th AP's Associated STAs Info) field, etc.
  • 1 st AP's Associated STAs Info field indicates the STA participating in C-BF and/or STA not participating in C-BF associated with the first AP participating in C-BF
  • m th AP's The Associated STAs Info indicates the STA participating in the C-BF and/or the STA not participating in the C-BF associated with the mth AP participating in the C-BF.
  • each associated STA information field includes at least one of the following fields:
  • the associated STA list (Associated STA List for C-BF) field participating in C-BF, the STA list field participating in C-BF is used to indicate the STA associated with the corresponding AP participating in the multi-AP coordinated transmission of the C-BF mode;
  • the Associated STA List for no C-BF (Associated STA List for no C-BF) field, which is used to indicate the multi-AP cooperation associated with the corresponding AP that does not participate in the C-BF mode transmitted STA
  • each Associated STA List for C-BF 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 corresponding AP participating in C-BF;
  • At least one STA ID field wherein the k th STA ID is used to indicate the ID of the kth STA participating in the C-BF associated with the corresponding AP.
  • the Associated STA List for no C-BF 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 corresponding AP that do not participate in C-BF;
  • At least one STA ID field wherein the dth STA ID is used to indicate the ID of the dth STA associated with the corresponding AP that does not participate in the C-BF.
  • Figure 21 is a schematic diagram of a frame format of a CSI report 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
  • RA Receiveiving Address
  • TA Transmission Address
  • CSI Report CSI Report
  • FCS FCS (4 bytes occupied).
  • the CSI report field may include a CSI information field (CSI Information field), which is used to carry CSI information reported by the AP.
  • CSI Information field CSI Information field
  • the CSI information field is used to carry the CSI between the shared AP and the unassociated OBSS STA, or it can also be used to carry the CSI between the shared AP and the associated STA participating in C-BF, and the Share CSI between AP and non-associated OBSS STA.
  • the length x of the CSI Information field satisfies that the CSI report frame does not exceed 11454 bytes, otherwise, the CSI report frame needs to be fragmented.
  • Fig. 22 is a schematic diagram of a frame format of a coordinated transmission notification 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 Announce Coordinated TX Announce
  • FCS occupied 4 bytes
  • the coordinated transmission notification field includes at least one of the following fields:
  • Coordinated TX Scheme Adopted field used to indicate the mode used to perform multi-AP coordinated transmission
  • the C-BF parameter field (C-BF Parameters field) is used to indicate the parameters or commands used for multi-AP cooperative transmission in the C-BF mode;
  • 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 AP 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 AP cooperative transmission.
  • 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 coordinated transmission notification frame;
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • the at least one AP ID field may include the first AP ID (1 st AP ID) field, ..., the mth AP ID (m th AP ID) field, etc.
  • the first AP ID (1 st AP ID) field indicates the ID of the first AP participating in the C-BF
  • the m th AP ID indicates the ID of the mth AP participating in the C-BF.
  • the at least one steering matrix field may include the steering matrix (TX Matrix for 1 st AP) field of the first AP, ..., the steering matrix (TX Matrix for 1 st AP) of the mth AP.
  • Matrix for m th AP) field, etc. the TX Matrix for1st AP field indicates the steering matrix corresponding to the first AP participating in C-BF, and the TX Matrix for m th AP indicates the steering matrix corresponding to the mth AP participating in C-BF.
  • the steering matrix corresponding to the APs participating in the C-BF may also be calculated by the master AP.
  • the shared AP After the shared AP determines the target CSI, it sends the target CSI to the main AP, and the main AP calculates the steering matrix corresponding to the AP participating in C-BF according to the target CSI.
  • the main AP calculates the steering matrix corresponding to the AP participating in C-BF according to the target CSI.
  • the shared AP may send the candidate CSI used to calculate the target CSI and the target information to the main AP, and the main AP calculates the steering matrix corresponding to the AP participating in the C-BF according to the candidate CSI and the target information .
  • the shared AP may send the collected CSI to the master AP.
  • the shared AP may also send the CSI obtained by the shared AP to the master AP.
  • the CSI between the shared AP and its associated STA participating in the C-BF and the CSI between the shared AP and the non-associated OBSS STA are sent to the master AP.
  • the shared AP may send target CSI to the main AP, or may also send candidate CSI and target information to the main AP.
  • the target CSI or the candidate CSI may be transmitted through the wired connection.
  • the candidate CSI and target information may be sent through a third request frame.
  • the third request frame may be used to carry the target CSI.
  • the third request frame is called a Coordinated Transmission Matrix Request (Coordinated TX Matrix Request) frame, or uses other similar names, which is not limited in this application.
  • the candidate CSI may include the first CSI obtained from the shared AP (the shared AP does not participate in C-BF), or include the first CSI obtained from the shared AP and the CSI obtained from the shared AP (the shared AP does not participate in C-BF).
  • AP participates in C-BF), for example, sharing CSI between an AP and its associated STAs participating in C-BF and sharing CSI between an AP and non-associated OBSS STAs.
  • the master AP removes the following CSI from the candidate CSI according to the target information to obtain the target CSI:
  • the master AP may send the steering matrix corresponding to each first-type AP to the shared AP.
  • the steering matrix corresponding to each AP of the first type may be transmitted through the wired connection.
  • the shared AP may send the steering matrix corresponding to each first-type AP to each of the first-type APs, for example, send the steering matrix corresponding to each first-type AP to the first notification frame through the foregoing first notification frame.
  • the shared AP may send the steering matrix corresponding to each first-type AP to each of the first-type APs, for example, send the steering matrix corresponding to each first-type AP to the first notification frame through the foregoing first notification frame.
  • Each of the first-type APs may send the steering matrix corresponding to each first-type AP to each of the first-type APs, for example, send the steering matrix corresponding to each first-type AP to the first notification frame through the foregoing first notification frame.
  • the master AP may use the third response frame to carry the steering matrix corresponding to each first-type AP calculated by the master AP.
  • the third response frame is also called a Coordinated Transmission Matrix Response (Coordinated TX Matrix Response) frame, or uses other similar names, which is not limited in this application.
  • Coordinated Transmission Matrix Response Coordinated TX Matrix Response
  • the main AP may send the steering matrix corresponding to each first-type AP to each First class APs.
  • the steering matrix corresponding to each AP of the first type may be transmitted through the wired connection.
  • the master AP may send the steering matrix corresponding to each AP of the first type to each AP of the first type through the second notification frame.
  • the second notification frame may be designed in a frame format similar to that of the first notification frame, which will not be repeated here.
  • the second notification frame may be a coordinated transmission trigger frame.
  • the master AP can notify each AP participating in the C-BF of the steering matrix of each participating C-BF during the coordinated transmission phase.
  • the master AP may not send a coordinated transmission notification frame.
  • the master AP may carry the steering matrix of each participating C-BF in the coordinated transmission trigger frame.
  • the shared APs participating in the C-BF may Data transmission is performed according to its corresponding steering matrix. That is, the steps of cooperative transmission notification and response (optional) are omitted.
  • the shared AP collects the CSI information obtained by the shared AP once through the cooperative transmission response frame.
  • the difference between Figure 25 and Figure 26 is that the shared AP replies with the cooperative transmission response frame synchronously and asynchronously.
  • the shared AP can also collect the CSI information obtained by the shared AP step by step.
  • the specific interaction mode refer to the relevant descriptions of the embodiments shown in FIG. Let me repeat.
  • the shared AP can send a coordinated transmission matrix request frame to the main AP, which is used to request the main AP to calculate the steering direction corresponding to the AP participating in C-BF matrix.
  • the coordinated transmission matrix request frame may carry the collected CSI and the aforementioned target information, the master AP determines the target CSI in the collected CSI according to the target information, and then determines the corresponding CSI of the AP participating in C-BF based on the target CSI Turn matrix.
  • the coordinated transmission matrix request frame may carry target CSI
  • the master AP may directly determine the steering matrix corresponding to the APs participating in the C-BF according to the target CSI.
  • the master AP After calculating the steering matrix corresponding to each AP participating in C-BF, the master AP can send the steering matrix corresponding to each AP participating in C-BF to the shared AP.
  • the master AP can send a coordinated transmission matrix response frame to the shared AP, and the coordinated transmission response frame includes the steering matrix corresponding to AP m.
  • the shared AP may send a cooperative transmission notification frame to the APs participating in the C-BF, and inform the APs participating in the C-BF of the steering matrix corresponding to the APs participating in the C-BF. For example, the shared AP sends a coordinated transmission notification frame to AP m, indicating the steering matrix corresponding to AP m.
  • the shared AP that receives the cooperative transmission notification frame can confirm the cooperative transmission notification frame sent by the shared AP through an acknowledgment (Ack) frame, and the shared AP can also not send an Ack frame, and accept the cooperative transmission notification sent by the shared AP by default. frame.
  • Ack acknowledgment
  • the shared AP collects the CSI information obtained by the shared AP once through the cooperative transmission response frame.
  • the difference between Figure 27 and Figure 28 is that the shared AP replies with the cooperative transmission response frame synchronously and asynchronously.
  • the shared AP can also collect the CSI information obtained by the shared AP step by step.
  • the specific interaction mode refer to the relevant description of the embodiment shown in FIG. 7 and FIG. Let me repeat.
  • Figure 27 and Figure 28 and Figure 25 and Figure 26 The difference between Figure 27 and Figure 28 and Figure 25 and Figure 26 is that after the master AP calculates the steering matrix corresponding to each AP participating in C-BF, it can directly send each The steering matrix corresponding to APs participating in C-BF. That is, the step of the master AP sending the steering matrix corresponding to each AP participating in C-BF to the shared AP through the coordinated transmission matrix response frame is omitted, but the master AP directly notifies the calculated steering matrix.
  • the shared AP collects the CSI information obtained by the shared AP once through the cooperative transmission response frame.
  • the difference between Figure 29 and Figure 30 is that the shared AP replies with the cooperative transmission response frame synchronously and asynchronously.
  • the shared AP can also collect the CSI information obtained by the shared AP step by step.
  • the specific interaction mode refer to the relevant descriptions of the embodiments shown in FIG. Let me repeat.
  • Fig. 29 and Fig. 30 and Fig. 25 and Fig. 26 The difference between Fig. 29 and Fig. 30 and Fig. 25 and Fig. 26 is that after the shared AP obtains the steering matrix corresponding to each AP participating in C-BF through the cooperative transmission matrix response frame, it can send each participating C-BF
  • the AP of the BF sends the steering matrix corresponding to each AP participating in the C-BF, that is, the step of sending the cooperative transmission notification by the sharing AP and replying a response (optional) by the shared AP is omitted.
  • the shared AP collects the CSI information obtained by the shared AP once through the cooperative transmission response frame.
  • the difference between Figure 31 and Figure 32 is that the shared AP replies with the cooperative transmission response frame synchronously and asynchronously.
  • the shared AP can also collect the CSI information obtained by the shared AP step by step.
  • the specific interaction mode refer to the relevant description of the embodiment shown in FIG. Let me repeat.
  • the difference between Figure 31 and Figure 32 and Figure 29 and Figure 30 is that after the master AP calculates the steering matrix corresponding to each AP participating in C-BF, it can notify each AP participating in C-BF of the corresponding steering matrix during the coordinated transmission phase.
  • the matrix for example, carries the steering matrix corresponding to each AP participating in the C-BF through the coordinated transmission trigger frame. That is, the steps of the coordinated transmission matrix response frame, the coordinated transmission notification frame and the shared AP response (optional) in the preparation phase are omitted.
  • Fig. 33 is a schematic diagram of a frame format of a coordinated transmission matrix request frame provided by an embodiment of the present application, which may include the following fields (or fields) (field):
  • Frame Control (Frame Control, occupying 2 bytes), Length (Duration, occupying 2 bytes), RA (occupying 6 bytes), TA (occupying 6 bytes), Coordinated Transmission Matrix Request (Coordinated TX Matrix Request) (variable number of bytes occupied), FCS (occupied 4 bytes).
  • the collaborative steering matrix request field includes at least one of the following fields:
  • the AP information quantity field is used to indicate the quantity of AP information carried by the coordinated transmission matrix request frame
  • At least one AP information (APs'Info) field is used to indicate the AP information participating in the multi-AP cooperative transmission in the C-BF mode.
  • the AP information field includes at least one of the following fields:
  • the AP ID field is used to indicate the AP participating in the multi-AP cooperative transmission of the C-BF mode
  • the associated STA list field participating in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field and participating in the multi-AP coordinated transmission of the C-BF mode;
  • the associated STA list field that does not participate in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • the CSI information field (CSI Information field) is used to indicate the CSI obtained by the AP indicated by the AP ID field.
  • the CSI information field is used to indicate the first type of CSI and/or the second type of CSI obtained by the AP indicated by the AP ID field. That is, the CSI carried in the CSI information field is all valid CSI.
  • the AP information field may not include the associated STA list field participating in C-BF and the associated STA list field not participating in C-BF, that is, no The main AP removes invalid CSI processing.
  • the CSI carried in the CSI information field includes valid CSI and invalid CSI.
  • the CSI information field is used to indicate the first type of CSI obtained by the AP indicated by the AP ID field and/or the CSI between the AP and an unassociated OBSS STA.
  • the AP information field can include the associated STA list field participating in C-BF and/or the associated STA list field not participating in C-BF, and the master AP can remove invalid CSI according to the participation status of STAs to obtain the target CSI .
  • the Associated STA List for C-BF subfield 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 AP participating in C-BF;
  • At least one STA ID field where the k th STA ID is used to indicate the ID of the kth STA associated with the second AP and participating in the C-BF.
  • the Associated STA List for no C-BF subfield 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 AP that do not participate in C-BF;
  • At least one STA ID field wherein the dth STA ID is used to indicate the ID of the dth STA associated with the AP that does not participate in the C-BF.
  • the length x of the CSI Information field satisfies that the collaborative transmission matrix request frame does not exceed 11454 bytes; otherwise, the collaborative transmission matrix request frame needs to be fragmented.
  • Fig. 34 is a schematic diagram of a frame format of a coordinated transmission matrix response frame provided by an embodiment of the present application, which may include the following fields (or fields) (field):
  • Frame Control (Frame Control, occupying 2 bytes), Length (Duration, occupying 2 bytes), RA (occupying 6 bytes), TA (occupying 6 bytes), Coordinated Transmission Matrix Response (Coordinated TX Matrix Response) (occupies a variable number of bytes (variable)), FCS (occupies 4 bytes).
  • the collaborative steering matrix response field includes at least one of the following fields:
  • the number of steering matrix (Number of APs'TX Matrix) field is used to indicate the number of steering matrices of the AP carried in the cooperative steering matrix response frame;
  • At least one AP ID field which is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode, and the n th AP ID represents the ID of the nth AP;
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • the at least one AP ID field may include the first AP ID (1 st AP ID) field, ..., the mth AP ID (m th AP ID) field, etc.
  • the first AP ID (1 st AP ID) field indicates the ID of the first AP participating in the C-BF
  • the m th AP ID indicates the ID of the mth AP participating in the C-BF.
  • the at least one steering matrix field may include a steering matrix (TX Matrix for 1 st AP) field for the first AP, ..., for the mth AP
  • the TX Matrix for 1st AP field indicates the steering matrix corresponding to the first AP participating in C-BF
  • the TX Matrix for m th AP indicates the mth AP participating in C-BF The corresponding steering matrix.
  • the sharing AP and the shared AP may also report CSI information to the MAP.
  • the steering matrix is further calculated by MAP.
  • the shared AP and the shared AP may transmit CSI information to the MAP through the wired backhaul.
  • the shared AP and the shared AP and the MAP may transmit the CSI information to the MAP through the wireless backhaul.
  • the shared AP may report to the MAP all the CSI obtained through channel detection (including valid CSI and invalid CSI), or may also report to the MAP the first type of CSI obtained by the shared AP and the CSI between non-associated OBSS STAs.
  • the shared AP may report to the MAP all the CSI obtained through channel detection (including valid CSI and invalid CSI), or may also report to the MAP the first type of CSI obtained by it and the shared AP and non-CSI CSI between associated OBSS STAs.
  • the shared AP may also report the participation information of the shared AP to the C-BF and the participation information of its associated STAs to the C-BF to the MAP.
  • the shared AP may report the participation information of the shared AP to the C-BF and the participation of the associated STA in the C-BF to the MAP through the wired backhaul Situation information.
  • the shared AP may report to the MAP the participation information of the shared AP for the C-BF and the information of the associated STA for the C-BF to the MAP through the wireless backhaul. Participation information.
  • the shared AP may also report the participation information of the shared AP to the C-BF and the participation information of its associated STAs to the C-BF to the MAP.
  • the shared AP may report to the MAP the information about the participation of the shared AP in C-BF and its associated STA's contribution to the C-BF to the MAP through a wired backhaul.
  • BF's participation information For example, if there is no connection between the shared AP and the MAP through a wired backhaul, the shared AP may report to the MAP the information about the participation of the shared AP in C-BF and its associated STA's contribution to the C-BF to the MAP through a wired backhaul. BF's participation information.
  • the shared AP may report the information about the participation of the shared AP to C-BF and its associated STA's participation in C-BF to the MAP through the wireless backhaul. - BF participation information.
  • the MAP can calculate the steering matrix corresponding to each AP participating in the C-BF according to the obtained CSI information and the above participation information.
  • the specific calculation method refer to the relevant description of the foregoing embodiments, which will not be repeated here.
  • the MAP may report to each participating C-BF -
  • the AP of the BF sends the steering matrix corresponding to each AP participating in the C-BF.
  • the MAP can send the steering matrix corresponding to each AP participating in the C-BF to each AP participating in the C-BF through the wired backhaul .
  • the MAP can send the steering matrix corresponding to each AP participating in the C-BF to each participating AP through the wireless backhaul AP.
  • the MAP calculates and obtains the steering matrix corresponding to each AP participating in C-BF (in the case that the shared AP also participates in C-BF, also includes the shared AP), it can send to the shared AP Steering matrix corresponding to each AP participating in C-BF.
  • the MAP may transmit the steering matrix corresponding to each AP participating in the C-BF to the shared AP through the wired backhaul.
  • the MAP may transmit the steering matrix corresponding to each AP participating in the C-BF to the shared AP through the wireless backhaul.
  • the shared AP may send the steering matrix corresponding to each shared AP participating in the C-BF to the shared AP participating in the C-BF (the steering matrix may be calculated by the sharing AP, or may also be MAP calculated).
  • the shared AP can transmit the steering matrix corresponding to each shared AP participating in the C-BF to each participating C-BF through the wired backhaul APs are shared.
  • the shared AP can transmit the steering matrix corresponding to each shared AP participating in the C-BF to each participating C-BF through the wireless backhaul of shared APs.
  • FIG. 35 is a schematic diagram of the interaction between the CSI and the steering matrix when the shared AP and the shared AP are connected through a wired backhaul. For example, steps such as:
  • the shared AP sends a coordinated transmission request frame to each shared AP to ask whether it participates in C-BF.
  • Each shared AP that receives the coordinated transmission request frame may reply with an Ack frame to confirm the coordinated transmission request frame sent by the shared AP, or may not reply with an Ack frame.
  • the shared AP participating in the C-BF sends the foregoing first information and the first CSI to the sharing AP through wired signaling.
  • the shared AP calculates the steering matrix of each AP participating in C-BF according to the CSI information collected through wired signaling, and then sends it to each AP participating in C-BF through wireless signaling. Alternatively, the shared AP may also send the calculated steering matrix to each AP participating in the C-BF through wired signaling.
  • the content included in the wireless signaling and the wired signaling refers to the frame structure design of the aforementioned coordinated transmission notification frame, which will not be repeated here.
  • the shared AP can collect the CSI information obtained by the shared AP through wired signaling, and can send the corresponding steering matrix to the shared AP participating in C-BF through wired signaling, which is beneficial to reduce wireless signaling overhead.
  • Figure 36 is a schematic diagram of the interaction between the CSI and the steering matrix when the shared AP and the master AP and the master AP and the shared AP are connected through a wired backhaul, for example, the following steps may be included:
  • the shared AP sends a cooperative transmission request frame to each shared AP to ask whether it participates in C-BF, or the shared AP can also send the obtained CSI and the participation information of its associated STAs to the master AP through wired signaling.
  • Each shared AP replies with a cooperative transmission response frame to inform the shared AP whether the shared AP participates in C-BF and/or the list of associated STAs participating in C-BF, or the shared AP participating in C-BF can also be connected via wired Signaling sends the obtained CSI and the participation information of its associated STA to the main AP;
  • the main AP calculates the steering matrix of each AP participating in C-BF based on the information collected through wired signaling, and then sends the steering matrix of each AP participating in C-BF to each AP participating in C-BF through wired signaling .
  • both the shared AP and the shared AP can send CSI information to the MAP through wired signaling.
  • the MAP calculates the steering matrix according to the CSI information, it can send the corresponding steering matrix to the AP participating in C-BF through wired signaling, which is beneficial to Reduce wireless signaling overhead.
  • the shared AP can collect the participation of the shared AP and its associated STAs in the multi-AP cooperative set for the C-BF multi-AP cooperative transmission, as well as the CSI information obtained by the shared AP, and further based on the participation information and The obtained CSI information determines the target CSI, and then calculates the steering matrix corresponding to the APs participating in C-BF based on the target CSI.
  • the shared AP calculates the steering matrix
  • only the APs participating in the multi-AP cooperative transmission of C-BF and The CSI between STAs is beneficial for APs to send useful signals to target STAs, and send nulls to OBSS STAs, reducing interference and improving transmission performance.
  • the shared AP may send the obtained CSI information to the main AP, and the main AP performs steering matrix calculation.
  • the main AP calculates the steering matrix, it can send the steering matrix to the shared AP, and the shared AP sends the steering matrix to the APs participating in C-BF, or the main AP can also directly send the calculated steering matrix to To APs participating in C-BF.
  • the shared AP may send the steering matrix to the APs participating in the C-BF during the preparation phase, or may also send the steering matrix to the APs participating in the C-BF during the coordinated transmission phase, for example, triggered by the coordinated transmission
  • the frame sends the steering matrix to the APs participating in C-BF.
  • the master AP may send the steering matrix to the APs participating in the C-BF during the preparation phase, or may also send the steering matrix to the APs participating in the C-BF during the coordinated transmission phase, for example, triggered by the coordinated transmission
  • the frame sends the steering matrix to the APs participating in C-BF.
  • Fig. 37 shows a schematic block diagram of an access point device 400 according to an embodiment of the present application. As shown in FIG. 19, the access point device 400 includes:
  • the processing unit 410 is configured to obtain target channel state information CSI, where the target CSI includes CSI between a first type of AP and a first type of station STA, where the first type of AP is a beam participating in a cooperative multi-AP coordination set
  • An AP for multi-AP cooperative transmission in C-BF mode the first type of STA is an STA participating in multi-AP cooperative transmission in C-BF mode
  • the target CSI is used to calculate the multi-AP cooperative transmission in the multi-AP cooperative set
  • a steering matrix corresponding to each first-type AP of the first-type AP, the steering matrix corresponding to the first-type AP is used for multi-AP cooperative transmission performed by the first-type AP in the C-BF mode.
  • the target CSI includes a first type of CSI and/or a second type of CSI, wherein the first type of CSI includes the first type of AP associated with the first type of AP
  • the CSI between STAs, the second type of CSI includes the first type of AP and the CSI between the first type of STAs in the overlapping basic service set OBSS of the first type of AP.
  • the access point device is a shared AP
  • the target CSI is determined according to CSI obtained by the shared AP from at least one shared AP and/or CSI obtained by the shared AP through channel detection.
  • the CSI obtained by the shared AP from at least one shared AP is obtained by the shared AP from at least one shared AP through a wired connection;
  • the CSI obtained by the sharing AP from the at least one shared AP is obtained by the sharing AP from the at least one shared AP through a wireless connection.
  • the access point device 400 includes:
  • a communication unit configured to send a first request frame to at least one second access point device in the multi-AP cooperation set, where the first request frame is used to request the at least one second access point device to participate in the C- Multi-AP cooperative transmission in BF mode.
  • the first request frame is sent by broadcast, multicast or unicast.
  • the first request frame includes at least one of the following information:
  • the first indication information is used to indicate the cooperative transmission mode requested to be used
  • the second indication information is used to indicate whether to feed back the first type of CSI obtained by the second access point device
  • the third indication information is used to indicate whether to feed back the CSI obtained by the second access point device between the second access point device and the OBSS STA of the second access point device.
  • the first request frame includes a coordinated transmission request field
  • 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 by multi-AP cooperative transmission in C-BF mode
  • the Coordinated Orthogonal Frequency Division Multiple Access C-OFDMA command field is used to indicate the command used for multi-AP cooperative transmission in C-OFDMA mode;
  • Coordinated spatial multiplexing C-SR command field which is used to indicate the command used for multi-AP cooperative transmission in C-SR mode
  • the joint transmission J-TX command field is used to indicate the command used for multi-AP cooperative transmission in J-TX mode
  • the coordinated uplink multi-user multiple-input multiple-output 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 C-BF command field includes at least one of the following fields:
  • Reporting the CSI field of the OBSS STA is used to indicate whether to feed back the CSI obtained by the second access point device between the second access point device and the OBSS STA of the second access point device.
  • the used coordinated transmission mode field includes at least one of the following fields:
  • the C-UL MU MIMO field is used to indicate whether the access point device requests multi-AP coordinated transmission using the C-UL MU MIMO mode.
  • the access point device 400 further includes:
  • a communication unit configured to receive a first response frame sent by the at least one second access point device, where the first response frame is used to indicate whether the second access point device accepts a multi-AP participating in the C-BF mode Collaborative transmission.
  • the first response frame is sent synchronously or asynchronously by the at least one second access point device.
  • the first response frame includes at least one of the following information:
  • the fourth indication information is used to indicate whether the second access point device accepts the requested coordinated transmission mode
  • a list of associated STAs participating in C-BF including STAs associated with the second access point device participating in multi-AP coordinated transmission in C-BF mode;
  • a list of associated STAs that do not participate in C-BF including STAs associated with the second access point device that do not participate in multi-AP coordinated transmission in C-BF mode;
  • At least one CSI including the first type of CSI obtained by the second access point device and/or the second access point device obtained by the second access point device and the CSI of the second access point device CSI between OBSS STAs.
  • the first response frame includes a coordinated transmission response field
  • 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 access point device
  • the C-BF information field is used to indicate the information related to the C-BF of the second access point device
  • the C-OFDMA information field is used to indicate the information related to C-OFDMA of the second access point device
  • the C-SR information field is used to indicate the information related to the C-SR of the second access point device
  • the J-TX information field is used to indicate the information related to J-TX of the second access point device
  • the C-UL MU MIMO information field is used to indicate information related to C-UL MU MIMO of the second access point device.
  • the C-BF information field includes at least one of the following fields:
  • the associated STA list field participating in C-BF is used to indicate the STA associated with the second access point device and participating in multi-AP coordinated transmission in C-BF mode;
  • the associated STA list field that does not participate in C-BF is used to indicate the STA associated with the second access point device that does not participate in multi-AP coordinated transmission in C-BF mode;
  • the CSI information field is used to indicate the first type of CSI obtained by the second access point device and/or the second access point device and the second access point obtained by the second access point device CSI between OBSS STAs of the device.
  • the accepted coordinated transmission mode field includes at least one of the following fields:
  • processing unit 410 is further configured to:
  • the first response frame includes the CSI obtained by the second access point device between the second access point device and the OBSS STA of the second access point device, according to the multi-AP cooperation set
  • the participation of the AP in the C-BF mode for multi-AP coordinated transmission and/or the participation of the STA associated with the AP for the C-BF mode of multi-AP coordinated transmission exclude the second access point device and all
  • the following CSI in the CSI between the OBSS STAs of the second access point device is obtained to obtain the target CSI:
  • the access point device 400 further includes:
  • a communication unit configured to send a second request frame to at least one third access point device in the multi-AP cooperation set, where the second request frame is used to request the third access point device to feed back CSI information.
  • the second request frame is sent by broadcast, multicast or unicast.
  • the second request frame includes at least one of the following information:
  • the fifth indication information is used to instruct the third access point device to feed back the first type of CSI and/or the second type of CSI;
  • AP number information used to indicate the number of APs included in the second request frame
  • An AP list including APs participating in multi-AP cooperative transmission in C-BF mode and/or APs not participating in multi-AP cooperative transmission in C-BF mode in the multi-AP cooperative set;
  • At least one associated STA list participating in C-BF At least one associated STA list participating in C-BF.
  • Each associated STA list participating in C-BF corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode.
  • the associated STA list participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in the multi-AP cooperative transmission in the C-BF mode;
  • At least one associated STA list that does not participate in C-BF each associated STA list that does not participate in C-BF corresponds to an AP that participates in multi-AP coordinated transmission in C-BF mode, and the associated STA list 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 second request frame includes a CSI request field
  • the CSI request field includes a field indicating:
  • the CSI request command field is used to indicate that the third access point device is requested to feed back the first type of CSI and/or the second type of CSI;
  • an AP quantity field used to indicate the quantity of APs included in the second request 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 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 the multi-AP cooperative transmission in the C-BF mode;
  • At least one associated 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 access point device 400 further includes:
  • a communication unit configured to receive a second response frame sent by the at least one third access point device, where the second response frame includes the CSI information fed back by the third access point device.
  • the second response frame is sent synchronously or asynchronously by the at least one third access point device.
  • the second response frame includes the first type of CSI obtained by the third access point device and/or the second type of CSI obtained by the third access point device.
  • the second response frame includes a CSI information field
  • the CSI information field is used to indicate the first type of CSI obtained by the third access point device and/or the third access point device The second type of CSI obtained.
  • processing unit 410 is further configured to:
  • the target CSI calculate a steering matrix corresponding to each first-type AP in the multi-AP cooperation set.
  • the access point device 400 further includes:
  • a communication unit configured to send the target CSI to the main AP device.
  • the access point device sends the target CSI to the master access point device through a wired connection or a wireless connection.
  • the access point device 400 further includes:
  • a communication unit configured for the access point device to send a third request frame to the master access point device, where the third request frame includes the target CSI, and the third request frame is used to request the master access point
  • the ingress device calculates a steering matrix according to the target CSI.
  • the third request frame includes a collaborative steering matrix request field
  • the collaborative steering matrix request field includes at least one of the following fields:
  • AP information quantity field used to indicate the quantity of AP information carried by the third request frame
  • At least one AP information field is used to indicate AP information participating in multi-AP cooperative transmission in C-BF mode.
  • the AP information field includes at least one of the following fields:
  • the AP ID field is used to indicate the AP participating in the multi-AP cooperative transmission of the C-BF mode
  • the associated STA list field participating in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field and participating in the multi-AP coordinated transmission of the C-BF mode;
  • the associated STA list field that does not participate in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • the CSI information field is used to indicate the first type of CSI and/or the second type of CSI obtained by the AP indicated by the AP ID field.
  • the access point device 400 further includes:
  • a communication unit configured to receive a steering matrix corresponding to each first-type AP in the multi-AP cooperative set sent by the master access point device.
  • the access point device receives the steering matrix corresponding to each first-type AP in the multi-AP cooperative set sent by the master access point device through a wired connection or a wireless connection.
  • the access point device 400 further includes:
  • a communication unit configured to receive a third response frame sent by the master access point device, where the third response frame includes a steering matrix corresponding to each first-type AP in the multi-AP cooperative set.
  • the third response frame includes a collaborative steering matrix response field
  • the collaborative steering matrix response field includes at least one of the following fields:
  • a number of steering matrices field used to indicate the number of steering matrices of the AP carried in the third response frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • the access point device 400 further includes:
  • a communication unit configured to send a steering matrix corresponding to each first-type AP to each first-type AP in the multi-AP cooperative set.
  • the access point device sends the steering matrix corresponding to each first-type AP to each first-type AP in the multi-AP cooperative set through a wired connection or a wireless connection.
  • the access point device 400 further includes:
  • a communication unit configured to send a first notification frame, where the first notification frame includes a steering matrix corresponding to each AP of the first type.
  • the first notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • 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 C-OFDMA parameter field is used to indicate the parameters used for multi-AP coordinated transmission in the C-OFDMA mode
  • the C-SR parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-SR mode
  • the J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the 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:
  • the number of APs field is used to indicate the number of steering matrices of APs carried in the first notification frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • 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 notification frame is also used for 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 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 access point device 400 may correspond to the first 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 access point device 400 In order to implement the corresponding processes of the first AP or the Sharing AP in the method 200 shown in FIGS.
  • Fig. 38 is a schematic block diagram of an access point device 500 according to an embodiment of the present application.
  • the access point device 500 of FIG. 38 includes:
  • the communication unit 510 is configured to send the first type of channel state information CSI and/or the second type of CSI obtained by the access point device to the first access point device, wherein the access point device is a multi-AP cooperative set
  • the first type of AP in the AP the first type of CSI obtained by the access point device includes the CSI between the access point device and the first type of station STA associated with the access point device, the access point
  • the second type of CSI obtained by the device includes the CSI between the access point device and a first type of STA in the overlapping basic service set OBSS of the access point device, and the first type of AP participates in cooperative beamforming
  • the first type of STA is an STA participating in multi-AP cooperative transmission in C-BF mode.
  • the first access point device is a shared AP
  • the access point device is a shared AP
  • the first type of CSI and/or the second type of CSI obtained by the access point device is sent by the access point device to the shared AP through a wired connection.
  • the first type of CSI and/or the second type of CSI obtained by the access point device is sent by the access point device to the shared AP through a wireless link.
  • the communication unit 510 is also used for:
  • the first request frame is sent by broadcast, multicast or unicast.
  • the first request frame includes at least one of the following information:
  • the first indication information is used to indicate the cooperative transmission mode requested to be used
  • the second indication information is used to indicate whether to feed back the first type of CSI obtained by the access point device
  • the third indication information is used to indicate whether to feed back the CSI obtained by the access point device between the access point device and an unassociated OBSS STA.
  • the first request frame includes a coordinated transmission request field
  • 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 Coordinated Orthogonal Frequency Division Multiple Access C-OFDMA command field is used to indicate the command used for multi-AP cooperative transmission in C-OFDMA mode;
  • Coordinated spatial multiplexing C-SR command field which is used to indicate the command used for multi-AP cooperative transmission in C-SR mode
  • the joint transmission J-TX command field is used to indicate the command used for multi-AP cooperative transmission in J-TX mode
  • the coordinated uplink multi-user multiple-input multiple-output 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 C-BF command field includes at least one of the following fields:
  • CSI field of the OBSS STA which is used to indicate whether to feed back the CSI obtained by the access point device between the access point device and the non-associated OBSS STA.
  • 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 the first access point device requests multi-AP cooperative transmission using J-TX mode
  • the C-UL MU MIMO field is used to indicate whether the first access point device requests multi-AP coordinated transmission using the C-UL MU MIMO mode.
  • the communication unit 510 is also used for:
  • a first response frame sent to the first access point device where the first response frame is used to indicate whether the access point device accepts participation in multi-AP coordinated transmission in the C-BF mode.
  • the first response frame includes at least one of the following information:
  • the fourth indication information is used to indicate whether the access point device accepts the requested coordinated transmission mode
  • a list of associated STAs participating in C-BF including STAs associated with the access point device participating in multi-AP cooperative transmission in C-BF mode;
  • a list of associated STAs that do not participate in C-BF including STAs associated with the access point device that do not participate in multi-AP coordinated transmission in C-BF mode;
  • the at least one CSI includes the first type of CSI obtained by the access point device and/or the CSI between the access point device and an unassociated OBSS STA obtained by the access point device.
  • the first response frame includes a coordinated transmission response field
  • 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 access point device
  • the C-BF information field is used to indicate the information related to the C-BF of the access point device
  • the C-OFDMA information field is used to indicate the information related to C-OFDMA of the access point device
  • the C-SR information field is used to indicate the information related to the C-SR of the access point device
  • the J-TX information field is used to indicate the information related to J-TX of the access point device
  • the C-UL MU MIMO information field is used to indicate information related to the C-UL MU MIMO of the access point device.
  • the C-BF information field includes at least one of the following fields:
  • the associated STA list field participating in C-BF is used to indicate the STA associated with the access point device and participating in multi-AP coordinated transmission in C-BF mode;
  • the associated STA list field that does not participate in C-BF is used to indicate the STA associated with the access point device that does not participate in multi-AP coordinated transmission in C-BF mode;
  • the CSI information field is used to indicate the first type of CSI obtained by the access point device and/or the second type of CSI obtained by the access point device.
  • 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 the access point device accepts the coordinated transmission of the C-UL MU MIMO mode.
  • the communication unit 510 is also used for:
  • the second request frame is sent by broadcast, multicast or unicast.
  • the second request frame includes at least one of the following information:
  • the fifth indication information is used to instruct the access point device to feed back the first type of CSI and/or the second type of CSI;
  • AP number information used to indicate the number of APs included in the second request frame
  • An AP list including APs participating in multi-AP cooperative transmission in C-BF mode and/or APs not participating in multi-AP cooperative transmission in C-BF mode in the multi-AP cooperative set;
  • At least one associated STA list participating in C-BF At least one associated STA list participating in C-BF.
  • Each associated STA list participating in C-BF corresponds to an AP participating in multi-AP coordinated transmission in C-BF mode.
  • the associated STA list participating in C-BF is used to indicate the corresponding The STA associated with the AP participating in the multi-AP cooperative transmission in the C-BF mode;
  • At least one associated STA list that does not participate in C-BF each associated STA list that does not participate in C-BF corresponds to an AP that participates in multi-AP coordinated transmission in C-BF mode, and the associated STA list 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 second request frame includes a CSI request field
  • the CSI request field includes a field indicating:
  • the CSI request command field is used to indicate that the access point device is requested to feed back the first type of CSI and/or the second type of CSI;
  • an AP quantity field used to indicate the quantity of APs included in the second request 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 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 the multi-AP cooperative transmission in the C-BF mode;
  • At least one associated 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 communication unit 510 is also used for:
  • the second response frame includes the second type of CSI obtained by the access point device.
  • the second response frame includes the first type of CSI and the second type of CSI obtained by the access point device.
  • the second response frame includes a CSI information field, and the CSI information field is used to indicate the first type of CSI obtained by the access point device and/or the second type of CSI obtained by the access point device.
  • Class CSI is used to indicate the first type of CSI obtained by the access point device and/or the second type of CSI obtained by the access point device.
  • the communication unit 510 is also used for:
  • the steering matrix corresponding to each AP of the first type is sent through a wired connection or a wireless connection.
  • the communication unit 510 is also used for:
  • a first notification frame is received, where the first notification frame includes a steering matrix corresponding to each AP of the first type.
  • the first notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • 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 C-OFDMA parameter field is used to indicate the parameters used for multi-AP coordinated transmission in the C-OFDMA mode
  • the C-SR parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-SR mode
  • the J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the 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:
  • the number of APs field is used to indicate the number of steering matrices of APs carried in the first notification frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • 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 notification 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 steering matrix corresponding to each AP of the first type is sent through a wired connection or a wireless connection.
  • the communication unit 510 is also used for:
  • the second notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • 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 C-OFDMA parameter field is used to indicate the parameters used for multi-AP coordinated transmission in the C-OFDMA mode
  • the C-SR parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-SR mode
  • the J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the 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:
  • the number of APs field is used to indicate the number of steering matrices of APs carried in the second notification frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • 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 second notification 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 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 access point device 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 of each unit in the second access point device 500 and/or functions are respectively to realize the corresponding process of the second AP or Shared AP in the method 200 shown in FIG. 6 to FIG.
  • Fig. 39 is a schematic block diagram of a master access point device 800 according to an embodiment of the present application.
  • the master access point device 800 in FIG. 39 includes:
  • the processing unit 810 is configured to acquire target channel state information CSI, where the target CSI includes CSI between the first type of AP and the first type of station STA;
  • the first type of AP is an AP that participates in the multi-AP cooperative transmission of the cooperative beamforming C-BF mode in the multi-AP cooperative set
  • the first type of STA is the multi-AP cooperative transmission participating in the C-BF mode STA
  • the target CSI is used to calculate the steering matrix corresponding to each first-type AP in the multi-AP cooperative set
  • the steering matrix corresponding to the first-type AP is used for the first-type AP to perform C- Multi-AP cooperative transmission in BF mode.
  • the target CSI includes a first type of CSI and/or a second type of CSI, wherein the first type of CSI includes the first type of AP associated with the first type of AP
  • the CSI between STAs, the second type of CSI includes the first type of AP and the CSI between the first type of STAs in the overlapping basic service set OBSS of the first type of AP.
  • the target CSI is obtained by the master AP device from the first AP device, or the target CSI is determined by the master AP device according to candidate CSI and target information ;
  • the first access point device is a shared AP
  • the candidate CSI includes the CSI obtained by the shared AP from at least one shared AP and/or the CSI obtained by the shared AP
  • the target information is used to indicate Participation of APs in the multi-AP cooperative set for multi-AP cooperative transmission in C-BF mode and/or participation of STAs associated with the APs in multi-AP cooperative transmission in C-BF mode.
  • the target CSI is obtained by the master AP device from the first AP device through a wired connection or a wireless connection;
  • the candidate CSI and the target information are acquired by the main AP device from the first AP device through a wired connection or a wireless connection.
  • processing unit 810 is further configured to:
  • the following CSI in the candidate CSI is removed to obtain the target CSI:
  • the second type of STA is an STA that does not participate in multi-AP coordinated transmission in C-BF mode
  • the second type of AP is an AP in the multi-AP cooperative set that does not participate in multi-AP coordinated transmission in C-BF mode .
  • the master access point device 800 further includes:
  • a communication unit configured to receive a third request frame sent by a shared AP, where the third request frame is used to request the master access point device to calculate a steering matrix according to the target CSI, where the third request frame includes the The target CSI or the third request frame includes the candidate CSI and the target information.
  • the third request frame includes a collaborative steering matrix request field
  • the collaborative steering matrix request field includes at least one of the following fields:
  • AP information quantity field used to indicate the quantity of AP information carried by the third request frame
  • At least one AP information field is used to indicate AP information participating in multi-AP cooperative transmission in C-BF mode.
  • the AP information field includes at least one of the following fields:
  • the AP ID field is used to indicate the AP participating in the multi-AP cooperative transmission of the C-BF mode
  • the associated STA list field participating in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field and participating in the multi-AP coordinated transmission of the C-BF mode;
  • the associated STA list field that does not participate in C-BF is used to indicate the STA associated with the AP indicated by the AP ID field that does not participate in the multi-AP coordinated transmission of the C-BF mode;
  • the CSI information field is used to indicate the first type of CSI and/or the second type of CSI obtained by the AP indicated by the AP ID field.
  • the master access point device calculates a steering matrix corresponding to each first-type AP in the multi-AP cooperation set according to the target CSI.
  • the master access point device 800 further includes: a communication unit, configured to send the steering matrix corresponding to each first-type AP in the multi-AP cooperative set to the first access point device .
  • the steering matrix corresponding to each AP of the first type is sent through a wired connection or a wireless connection.
  • the master access point device 800 further includes:
  • a communication unit configured to send a third response frame to the first access point device, where the third response frame includes a steering matrix corresponding to each first-type AP in the multi-AP cooperative set.
  • the third response frame includes a collaborative steering matrix response field
  • the collaborative steering matrix response field includes at least one of the following fields:
  • a number of steering matrices field used to indicate the number of steering matrices of the AP carried in the third response frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • the master access point device 800 further includes:
  • a communication unit configured to send the steering matrix corresponding to each first-type AP to each first-type AP in the multi-AP cooperative set.
  • the master access point device 800 further includes:
  • a communication unit configured to send a second notification frame, where the second notification frame includes a steering matrix corresponding to each AP of the first type.
  • the second notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • the second notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • the second notification frame includes a coordinated transmission notification field, and the coordinated transmission notification field is used to carry the steering matrix corresponding to each AP of the first type.
  • 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 C-OFDMA parameter field is used to indicate the parameters used for multi-AP coordinated transmission in the C-OFDMA mode
  • the C-SR parameter field is used to indicate the parameters used for multi-AP cooperative transmission in the C-SR mode
  • the J-TX parameter field is used to indicate the parameters used for multi-AP cooperative transmission in J-TX mode
  • the 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:
  • the number of APs field is used to indicate the number of steering matrices of APs carried in the second notification frame
  • At least one AP ID field is used to indicate the AP participating in the multi-AP coordinated transmission of the C-BF mode
  • each steering matrix field corresponds to an AP indicated by the at least one AP ID field, and the steering matrix field is used to indicate the steering used by the corresponding AP to perform multi-AP coordinated transmission in C-BF mode matrix.
  • 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 second notification 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 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 master access point device 800 may correspond to the master AP in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the master access point device 800 are respectively for
  • the corresponding process of implementing the master AP in the method 200 shown in FIG. 6 to FIG. 36 will not be repeated here.
  • FIG. 40 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application.
  • the communication device 600 shown in FIG. 40 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.
  • the communication device 600 may specifically be the master AP of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the master AP in the various methods of the embodiment of the present application. For the sake of brevity, details are not repeated here. .
  • Fig. 41 is a schematic structure diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 41 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 can be applied to the master AP in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the master AP in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.
  • 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. 42 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 42 , 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 communication system 900 may further include a main AP, configured to implement corresponding functions implemented by the main AP in the above method, and for the sake of brevity, details are not repeated here.
  • a main AP configured to implement corresponding functions implemented by the main AP in the above method, and for the sake of brevity, details 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 computer-readable storage medium can be applied to the master AP in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the master AP in each method of the embodiment of the present application.
  • the computer program enables the computer to execute the corresponding process implemented by the master AP in each method of the embodiment of the present application.
  • 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 computer program product can be applied to the master AP in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the master AP in the various methods of the embodiments of the present application.
  • the Let me repeat for the sake of brevity, the Let me repeat.
  • 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 computer program can be applied to the master AP in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the master AP in each method of the embodiment of the present application, for the sake of brevity , which will not be 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. .

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Abstract

一种无线通信的方法和设备，该方法包括：第一接入点AP获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。

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获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
第二方面，提供了一种无线通信的方法，包括：第二接入点AP向第一AP发送所述第二AP获得的第一类信道状态信息CSI和/或第二类CSI，其中，所述第二AP为多AP协作集合中的第一类AP，所述第二AP获得的第一类CSI包括所述第二AP和所述第二AP关联的第一类站点STA之间的CSI，所述第二AP获得的第二类CSI包括所述第二AP和所述第二AP的重叠基本服务集OBSS中的第一类STA之间的CSI，所述第一类AP为参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与C-BF模式的多AP协作传输的STA。
第三方面，提供了一种无线通信的方法，包括：主接入点AP获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
第四方面，提供了一种接入点设备，用于执行上述第一方面或其各实现方式中的方法。
具体地，该接入点设备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。
第五方面，提供了一种接入点设备，用于执行上述第二方面或其各实现方式中的方法。
具体地，该接入点设备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。
第六方面，提供了一种主接入点设备，用于执行上述第三方面或其各实现方式中的方法。
具体地，该主接入点设备包括用于执行上述第三方面或其各实现方式中的方法的功能模块。
第七方面，提供了一种接入点设备，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。
第八方面，提供了一种接入点设备，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。
第九方面，提供了一种主接入点设备，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，执行上述第三方面或其各实现方式中的方法。
第十方面，提供了一种芯片，用于实现上述第一方面至第三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三方面中的任一方面或其各实现方式中的方法。
第十一方面，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三方面中的任一方面或其各实现方式中的方法。
第十二方面，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三方面中的任一方面或其各实现方式中的方法。
第十三方面，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三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，共享AP可以获取目标CSI，该目标CSI为参与C-BF的AP和STA之间的CSI，该目标CSI用于计算参与C-BF的AP对应的转向矩阵，即本申请实施例在计算转向矩阵时只考虑参与C-BF的多AP协作传输的AP和STA之间的CSI，因此，基于该转向矩阵执行多AP协作传输，有利于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。
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是共享AP分步收集CSI信息，被共享AP同步响应的示意性图。
图8是共享AP分步收集CSI信息，被共享AP异步响应的示意性图。
图9是共享AP一次收集CSI信息，被共享AP同步响应的示意性图。
图10是共享AP一次收集CSI信息，被共享AP异步响应的示意性图。
图11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12和图13是共享AP通过协作传输触发帧通知转向矩阵的示意性交互图。
图14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15是图14所示协作传输请求帧中的使用的协作传输模式字段的示意性格式图。
图16是图14所示协作传输请求帧中的C-BF命令字段的示意性格式图。
图17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18是图17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19是图17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20是本申请实施例提供的一种CSI请求帧的帧格式示意图。
图21是本申请实施例提供的一种CSI上报帧的帧格式示意图。
图22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23是图22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24是图22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25是本申请实施例提供的一种共享AP通过主AP计算转向矩阵并由共享AP通知转向矩阵的示意性交互图。
图26是本申请实施例提供的另一种共享AP通过主AP计算转向矩阵并由共享AP通知转向矩阵的示意性交互图。
图27是本申请实施例提供的一种共享AP通过主AP计算转向矩阵并且不在准备阶段通知转向矩阵的示意性交互图。
图28是本申请实施例提供的另一种共享AP通过主AP计算转向矩阵并且不在准备阶段通知转向矩阵的示意性交互图。
图29是本申请实施例提供的一种共享AP通过主AP计算转向矩阵并由共享AP在协作传输阶段通知转向矩阵的示意性交互图。
图30是本申请实施例提供的另一种共享AP通过主AP计算转向矩阵并由共享AP在协作传输阶段通知转向矩阵的示意性交互图。
图31是本申请实施例提供的一种共享AP通过主AP计算转向矩阵并由主AP在协作传输阶段通知转向矩阵的示意性交互图。
图32是本申请实施例提供的另一种共享AP通过主AP计算转向矩阵并由主AP在协作传输阶段通知转向矩阵的示意性交互图。
图33是本申请实施例提供的一种协作传输矩阵请求帧的示意性格式图。
图34是本申请实施例提供的一种协作传输矩阵响应帧的示意性格式图。
图35和图36是本申请实施例提供的通过有线回程传输CSI信息的示意性交互图。
图37是本申请实施例提供的一种接入点设备的示意性框图。
图38是本申请实施例提供的另一种接入点设备的示意性框图。
图39是本申请实施例提供的主接入点设备的示意性框图。
图40是本申请实施例提供的一种通信设备的示意性框图。
图41是本申请实施例提供的一种芯片的示意性框图。
图42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，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。以上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获取目标信道状态信息CSI。
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，在本申请实施例中，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，将多AP协作集合中的AP所关联的STA中参与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，所述目标CSI包括第一类AP和第一类STA之间的CSI。
例如，所述目标CSI包括第一类CSI和/或第二类CSI，其中，所述第一类CSI包括所述第一类AP和所述第一类AP关联的第一类STA之间的CSI，所述第二类CSI包括所述第一类AP和所述第一类AP非关联的STA之间的CSI，例如第一类AP和所述第一类AP的OBSS中的第一类STA之间的CSI。
在一些实施例中，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵(steering matrix)，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
在本申请实施例中，目标CSI可以理解为用于计算转向矩阵的有用CSI(或者说，有效CSI)，与第二类AP或第二类STA相关的CSI可以认为是无效CSI(或者说，无效CSI)，因此，基于该目标CSI计算的转向矩阵进行协作传输，有利于保证第一类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。
在本申请实施例中，所述转向矩阵或称C-BF转向矩阵、传输矩阵(Tx Matrix)。
在一些实施例中，所述第一AP为多AP协作集合中的共享AP(Sharing AP)。
在一些实施例中，所述第一AP既为Sharing AP，又为MAP(Controller)。
以下，以所述第一AP的角色为共享AP为例进行说明，但本申请并不限于此。
在本申请一些实施例中，所述方法200还包括：
第一AP接收至少一个第二AP发送的第一信息，其中，所述第一信息用于指示所述第二AP是否参与C-BF和/或所述第二AP关联的STA是否参与C-BF。
在一些实施例中，所述至少一个第二AP为被共享AP，例如所述至少一个第二AP包括多AP协作集合中的所有被共享AP。
在一些实施例中，共享AP根据所有被共享AP上报的第一信息，以及共享AP及其关联的STA对于C-BF的参与情况可以得到目标信息，所述目标信息用于指示多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关联的站点STA对于C-BF模式的多AP协作传输的参与情况。
在本申请一些实施例中，所述方法200还包括：
第一AP接收至少一个第三AP发送的第一CSI。
在一些实施例中，所述至少一个第三AP为共享AP。
在一些实施例中，所述至少一个第三AP包括多AP协作集合中的参与C-BF的被共享AP。
例如，所述至少一个第三AP包括所述至少一个第二AP中的参与C-BF的AP。
在另一些实施例中，所述至少一个第三AP包括多AP协作集合中的所有被共享AP。
也即，可以是仅第一类AP向共享AP上报CSI，或者，也可以是全部被共享AP(包括第一类AP和第二类AP)均向共享AP上报CSI。
在一些实施例中，所述第一CSI的信息组成可以为以下情况中的一种：
情况1：第一CSI包括被共享AP通过信道探测获得的第一类CSI和/或被共享AP和OBSS STA(包括参与C-BF的OBSS STA和不参与C-BF的OBSS STA)之间的CSI；
情况2：第一CSI包括被共享AP通过信道探测获得的第一类CSI和/或第二类CSI；
情况3：第一CSI包括被共享AP通过信道探测获得的全部CSI。
在一些实施例中，共享AP和被共享AP之间具有有线连接，被共享AP可以通过有线连接将第一CSI传输给共享AP。例如，在信道探测完成之后，所有被共享AP可以通过有线连接将通过信道探测获得的全部CSI传输给共享AP。
在另一些实施例中，共享AP和被共享AP之间具有无线连接，该被共享AP可以通过信令将第一CSI发送给共享AP。
在本申请一些实施例中，将用于确定目标CSI的CSI记为候选CSI，则当所述共享AP参与C-BF时，所述候选CSI包括从所述至少一个第三AP中的每个第三AP获得的第一CSI以及所述共享AP通过信道探测获得的CSI，或者，当所述共享AP不参与C-BF时，所述候选CSI包括从所述至少一个第三AP中的每个第三AP获得的第一CSI。
在本申请一些实施例中，所述目标CSI是所述共享AP根据目标信息在所述候选CSI中确定的。
例如，当所述共享AP从所述至少一个被共享AP获得的CSI包括无效CSI时，所述共享AP可以根据目标信息在所述候选CSI中确定所述目标CSI。
在一些实施例中，所述共享AP根据所述目标信息，剔除所述候选CSI中的如下无效CSI，得到所述目标CSI：
所述第一类AP和所述第一类AP关联的第二类STA之间的CSI；
所述第一类AP和第二类AP关联的STA之间的CSI。
应理解，在本申请实施例中，AP(包括共享AP和被共享)获得的CSI可以是AP在信道探测阶段获得的，本申请实施例对于具体的信道探测过程不作限定，例如可以采用图5所示的方式执行信道探测，但本申请并不限于此。
在一些实施例中，在执行信道探测之后，所述多AP协作集合中的AP保存通过信道探测获得的CSI，例如，该共享AP从被共享AP获得的第一CSI可以是在最近的一次信道探测阶段获取的。
可选地，该AP保存的CSI可以包括AP与关联STA之间的CSI和AP和非关联STA(例如OBSS STA)之间的CSI，其中，关联STA指该AP所关联的STA，OBSS STA指该AP的OBSS中的STA。
在本申请一些实施例中，当一个被共享AP既向共享AP发送第一信息，又向共享AP发送第一CSI时，所述第一信息和所述第一CSI可以是被共享AP通过同一帧发送的，或者，也可以通过不同帧发送的。
在本申请一些实施例中，在第一CSI包括被共享AP通过信道探测获得的第一类CSI和第二类CSI时，所述第一类CSI和第二类CSI可以是通过同一帧发送的，或者，也可以是通过不同帧发送的。
也即，所述共享AP可以一次收集被共享AP获得的第一类CSI和第二类CSI，也可以分步收集被共享AP获得的第一类CSI和第二类CSI。
在一些实施例中，若被共享AP不参与C-BF，所述被共享AP可以仅向共享AP发送第一信息，不发送第一CSI。
在一些实施例中，若被共享AP参与C-BF，所述被共享AP可以向共享AP发送所述第一信息和所述第一CSI。
以下，结合具体实施例，说明被共享AP向共享AP发送第一信息和/或第一CSI的具体实现。
在本申请一些实施例中，所述方法200还包括：
所述第一AP向至少一个第二AP发送第一请求帧，所述第一请求帧用于请求所述至少一个第二AP参与C-BF模式的多AP协作传输。
在一些实施例中，所述至少一个第二AP可以为被共享AP。
在一些实施例中，所述至少一个第二AP包括所述多AP协作集合中的所有被共享AP。
在一些实施例中，所述第一请求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。
在一些实施例中，所述第一请求帧是通过广播、组播或单播方式发送的。
对应的，所述至少一个被共享AP可以同步接收或异步接收所述第一请求帧。
在一些实施例中，在所述第一请求帧指示请求参与C-BF模式的多AP协作传输的情况下，可以认为所述共享AP请求被共享AP上报该共享AP及其关联的STA对于C-BF的参与情况。
在一些实施例中，在所述第一请求帧指示请求参与C-BF模式的多AP协作传输的情况下，默认所述共享AP请求被共享AP反馈CSI。
在一些实施例中，所述第一请求帧还可以用于指示共享AP是否请求被共享AP反馈CSI。
可选地，在共享AP请求反馈CSI的情况下，被共享AP可以上报被共享AP获得的全部CSI，或者，上报被共享AP反馈获得的第一类CSI和被共享AP和所有OBSS STA(包括参与C-BF的OBSS STA和不参与C-BF的OBSS STA)之间的CSI，在共享AP不请求反馈CSI的情况下，被共享AP可以不反馈CSI。
在一些实施例中，在所述第一请求帧未指示请求反馈的CSI类型的情况下，默认反馈被共享AP获得的第一类CSI和被共享AP和所有OBSS STA(包括参与C-BF的OBSS STA和不参与C-BF的OBSS STA)之间的CSI。
在一些实施例中，所述第一请求帧还可以用于指示共享AP请求被共享AP反馈的CSI类型。
例如，所述第一请求帧用于指示是否请求被共享AP反馈获得的第一类CSI和/或被共享AP和所有OBSS STA(包括参与C-BF的OBSS STA和不参与C-BF的OBSS STA)之间的CSI。
又例如，所述第一请求帧用于指示是否请求被共享AP反馈获得的第一类CSI和/或第二类CSI。
综上，在一些实施例中，所述第一请求帧请求被共享AP反馈的信息组成可以有如下实现方式：
反馈方式1：被共享AP及其关联的STA对于C-BF的参与情况信息(对应前述第一信息)；
反馈方式2：被共享AP及其关联的STA对于C-BF的参与情况信息和被共享AP获得的CSI(即全部CSI)；
反馈方式3：被共享AP及其关联的STA对于C-BF的参与情况信息和被共享AP获得的第一类CSI；
反馈方式4：被共享AP及其关联的STA对于C-BF的参与情况信息、被共享AP获得的第一类CSI以及被共享AP和非关联的OBSS STA(包括参与C-BF的OBSS STA和不参与C-BF的OBSS STA)之间的CSI。
在一些实施例中，所述第一请求帧包括以下信息中的至少一个：
第一指示信息，用于指示请求第一AP使用的协作传输模式；
第二指示信息，用于指示是否反馈所述第二AP获得的第一类CSI；
第三指示信息，用于指示是否反馈所述第二AP获得的第二AP和非关联的OBSS STA之间的CSI。
在一些实施例中，所述第一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，在所述第一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，可以认为所述共享AP请求被共享AP上报该共享AP及其关联的STA对于C-BF的参与情况。
在一些实施例中，所述共享AP可以通过独立的指示信息分别指示被共享AP反馈的CSI类型。
例如，第二指示信息对应1比特，第三指示信息对应另外1比特，第二指示信息对应的1比特的取值用于指示是否反馈第二AP获得的第一类CSI，第三指示信息对应的1比特的取值用于指示是否反馈第二AP获得的第二AP和非关联的OBSS STA之间的CSI。作为示例，取值为1表示反馈，取值为0表示不反馈。
在另一些实施例中，所述共享AP可以通过一个指示信息指示被共享AP是否反馈第二AP获得的第一类CSI和第二AP获得的第二AP和非关联的OBSS STA之间的CSI。例如，通过该指示信息的不同取值，指示反馈的CSI的类型。
作为示例，该指示信息对应2比特，取值为00表示不反馈CSI，取值为01表示反馈第二AP获得的第一类CSI，取值为10表示反馈第二AP获得的第二AP和非关联的OBSS STA之间的CSI，取值为11表示反馈第二AP获得的第一类CSI和第二AP获得的第二AP和非关联的OBSS STA之间的CSI。
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二AP发送的第一响应帧，所述第一响应帧用于指示所述第二AP是否接受参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应帧是所述至少一个第二AP同步或异步发送的。
例如，在所述第一请求帧通过广播或组播方式发送时，所述第一AP接收所述至少一个第二AP同步发送的第一响应帧。
又例如，在所述第一请求帧通过单播方式发送时，所述第一AP接收所述至少一个第二AP异步发送的第一响应帧。
在一些实施例中，所述第一响应帧或称协作传输响应(Coordinated TX Response)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，所述第一响应帧包括所述第一信息，不包括第一CSI。
即，第一响应帧仅指示被共享AP及其关联的STA对于C-BF的参与情况，不指示CSI信息。
在一些实施例中，若被共享AP不参与C-BF，第一信息可以不包括被共享AP关联的STA的参与情况信息，意味着该被共享AP关联的所有STA均不参与C-BF。
在一些实施例中，若被共享AP参与C-BF，第一信息可以包括被共享AP关联的STA的参与情况信息。
在一些实施例中，若被共享AP关联的所有STA均参与C-BF，第一信息也可以不指示被共享AP关联的STA的参与情况信息，意味着该被共享AP关联的所有STA均参与C-BF。
在一些实施例中，所述第一信息可以直接指示所述被共享AP对应的第一类STA集合和/或第二类STA集合。
例如，第一信息包括参与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)，所述参与C-BF的STA列表用于指示被共享AP关联的第一类STA，所述不参与C-BF的STA列表用于指示被共享AP关联的第二类STA。
例如，第一信息可以显式指示被共享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，所述第一信息可以通过位图(bitmap)方式指示被共享AP对应的第一类STA集合和/或第二类STA集合。
例如，第一信息包括关联STA列表和C-BF位图，所述关联STA列表用于指示被共享AP关联的所有STA，所述C-BF位图包括K个比特，每个比特对应关联STA列表中的一个STA，例如第一个比特对应关联STA列表中的第一个STA，第二个比特对应关联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为关联STA列表包括的STA数，K为正整数。
可选地，若共享AP可以获知被共享AP关联的STA信息，则第一信息也可以不包括关联STA列表，只需要包括C-BF位图，只要共享AP和被共享AP对于C-BF位图中的每个比特和STA的对应关系的理解一致即可。
在本申请一些实施例中，所述被共享AP可以根据共享AP的指示进行CSI的上报。
例如，若第一请求帧指示被共享AP上报被共享AP和关联的第一类STA之间的CSI以及被共享AP和OBSS STA之间的CSI(对应前述反馈方式4)时，所述第一响应帧可以包括共享AP和关联的第一类STA之间的CSI以及被共享AP和OBSS STA之间的CSI。
又例如，若第一请求帧指示被共享AP上报被共享AP和关联的第一类STA之间的CSI(对应前述反馈方式3)时，所述第一响应帧可以包括共享AP和关联的第一类STA之间的CSI。
再例如，若第一请求帧指示被共享AP上报被共享AP及其关联的STA对于C-BF的参与情况信息(对应前述反馈方式1)时，所述第一响应帧可以不包括CSI信息。
可选地，在第一请求帧未指示上报的CSI类型的情况下，被共享AP可以不上报CSI，或者，也可以上报获得的全部CSI(即采用前述反馈方式2上报)，或者，仅上报获得的第一类CSI(即采用前述反馈方式3上报)，或者，上报获得的第一类CSI和被共享AP和OBSS STA之间的CSI(即采用前述反馈方式4上报)。
在本申请另一些实施例中，所述第一响应帧可以包括第一信息和第一CSI中的部分或全部CSI。
即，第一响应帧可以用于指示被共享AP及其关联的STA对于C-BF的参与情况，还可以用于指示第一CSI中的部分或全部。
可选地，第一CSI可以通过一个帧发送，或者，也可以通过多个帧发送。
在一些实施例中，所述第一响应帧可以包括第一信息和被共享AP获得的第一类CSI。
在另一些实施例中，所述第一响应帧可以包括第一信息和被共享AP获得的第一类CSI和第二AP和非关联的OBSS STA之间的CSI。
在又一些实施例中，所述第一响应帧可以包括第一信息和被共享AP获得的全部CSI。
在一些实施例中，所述第一响应帧包括以下信息中的至少之一：
第四指示信息，用于指示所述第二AP是否接受请求使用的协作传输模式；
参与C-BF的关联STA列表，包括所述第二AP关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表，包括所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
至少一个CSI，包括所述第二AP获得的第一类CSI和/或所述第二AP获得的第二AP和非关联的OBSS STA之间的CSI。
在一些实施例中，所述第一响应帧包括参与C-BF的关联STA列表是强制的，所述第一响应帧包括不参与C-BF的关联STA列表是可选的。
在一些实施例中，在所述第四指示信息用于指示第二AP接受C-BF模式的协作传输的情况下，所述第一响应帧包括所述参与C-BF的关联STA列表，或者，包括参与C-BF的关联STA列表和至少一个CSI。可选地，还可以包括不参与C-BF的关联STA列表。
在一些实施例中，在所述第四指示信息指示拒绝请求使用的协作传输模式时，所述第一响应帧可以不包括参与C-BF的关联STA列表、不参与C-BF的关联STA列表和至少一个CSI，意味着被共享AP关联的所有STA均不参与C-BF。
在一些实施例中，在所述第四指示信息指示接受请求使用的协作传输模式，并且第一请求帧指示不反馈CSI时，所述第一响应帧可以包括参与C-BF的关联STA列表和/或不参与C-BF的关联STA列表，即不包括CSI信息。
在一些实施例中，在所述第四指示信息指示接受请求使用的协作传输模式时，所述第一请求帧指示反馈第二AP获得的第一类CSI时，所述第一响应帧可以包括参与C-BF的关联STA列表和/或不参与C-BF的关联STA列表，以及第二AP获得的第一类CSI。
在一些实施例中，在所述第四指示信息指示接受请求使用的协作传输模式时，所述第一请求帧指示反馈第二AP获得的第一类CSI和第二AP获得的第二AP和非关联的OBSS STA之间的CSI时，所述第一响应帧可以包括参与C-BF的关联STA列表和/或不参与C-BF的关联STA列表，以及第二AP获得的第一类CSI和第二AP和非关联的OBSS STA之间的CSI。
需要说明的是，以上仅以第一响应帧通过指示参与C-BF的STA列表和/或不参与C-BF的STA列表来指示STA对于C-BF的参与情况为例进行说明，在其他实施例中，也可以通过位图方式指示STA对于C-BF的参与情况，本申请对此不作限定。
例如，所述第一响应帧包括以下信息中的至少之一：
第四指示信息，用于指示所述第二AP是否接受请求使用的协作传输模式；
关联STA列表，包括所述第二AP关联的所有STA；
C-BF位图，用于指示所述第二AP关联的参与C-BF和/或不参与C-BF的STA；
至少一个CSI，包括所述第二AP获得的第一类CSI和/或或所述第二AP获得的第二AP和非关联的OBSS STA之间的CSI。
在本申请一些实施例中，所述方法200还包括：
所述第一AP向所述多AP协作集合中的至少一个第三AP发送第二请求帧，所述第二请求帧用于请求所述第三AP反馈CSI信息。
在一些实施例中，在第一请求帧只请求所述被共享AP反馈第一信息(对应前述反馈方式1)，所述共享AP可以通过第二请求帧请求被共享AP反馈第一类CSI和被共享AP和非关联的OBSS STA之间的CSI。
又例如，在第一请求帧只请求被共享AP反馈了第一类CSI(例如前述反馈方式3)的情况下，所述共享AP可以通过第二请求帧请求被共享AP反馈其与非关联的OBSS STA之间的CSI。也即，共享AP可以分步收集被共享AP获得的CSI信息。
在一些实施例中，所述第二请求帧或称CSI请求帧，或者，也可以采用其他类似命名，本申请对此不作限定。
在一些实施例中，所述至少一个第三AP可以为所述至少一个第二AP中参与C-BF的AP。
在一些实施例中，所述第二请求帧是通过广播、组播或单播方式发送的。
对应的，所述至少一个第三AP同步或异步接收所述第二请求帧。
在一些实施例中，所述第二请求帧中可以携带前述目标信息。
在一些实施例中，所述目标信息是共享AP根据被共享AP发送的第一响应帧中携带的第一信息汇总得到的。
即，共享AP可以通过第二请求帧通知参与C-BF的AP多AP协作集合中的AP对于C-BF的参与情况和/或AP关联的STA对于C-BF的参与情况。
进一步地，参与C-BF的第三AP在进行CSI反馈时，可以根据该目标信息剔除预存的CSI中的无效CSI，只反馈有效CSI。
在一些实施例中，所述目标信息可以用于指示以下信息中的至少一项：
至少一个AP，包括所述多AP协作集合中第一类AP，和/或，所述多AP协作集合中第二类AP；
至少一个STA集合，每个STA集合对应一个第一类AP，所述STA集合包括对应的第一类AP关联的STA中第一类STA，和/或，对应的第一类AP关联的STA中第二类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STA。
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，说明目标信息的具体实现。
情况1：所述目标信息仅指示至少一个第一类AP。
可选地，此情况下，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，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，所述目标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：所述目标信息仅指示至少一个第二类AP。
可选地，此情况下，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，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，所述目标信息可以只指示不参与C-BF的AP。
情况3：所述目标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：所述目标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，所述目标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，目标信息包括至少一个第一类AP的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，所述目标信息可以通过位图(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，目标信息包括第一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，则目标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，所述目标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，目标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，所述目标信息可以通过位图(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，所述目标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，则目标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。
在本申请一些实施例中，所述第二请求帧包括以下信息中的至少一项：
第五指示信息，所述第五指示信息用于指示所述第三AP反馈第一类CSI和/或第二类CSI；
AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
AP列表，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/或不参与C-BF模式的多AP协作传输的AP；
至少一个参与C-BF的关联STA列表，每个参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述参与C-BF的关联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；
至少一个不参与C-BF的关联STA列表，每个不参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述不参与C-BF的关联STA列表用于指示对应的AP关联的不参与C-BF模式的多AP协作传输的STA。
在本申请另一些实施例中，所述第二请求帧包括以下信息中的至少一项：
第五指示信息，所述第五指示信息用于指示所述第三AP反馈第一类CSI和/或第二类CSI；
AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
AP列表，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，每个关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述关联STA列表用于指示对应的AP关联的STA；
至少一个第二C-BF位图，每个第二C-BF位图对应一个参与C-BF模式的多AP协作传输的AP，所述第二C-BF位图用于指示对应的AP的关联STA列表中的参与C-BF模式的多AP协作传输的STA和/或不参与C-BF模式的多AP协作传输的STA。
可选地，第五指示信息可以为1比特，该1比特的不同取值用于指示反馈的CSI的类型，例如，取值为0表示反馈第二类CSI，取值为1表示反馈第一类CSI和第二类CSI。
在一些实施例中，所述AP列表包括参与C-BF的AP列表，或者，包括参与C-BF的AP列表和不参与C-BF的AP列表。
在一些实施例中，所述第二请求帧包括参与C-BF的AP列表是强制的，所述第二请求帧包括不参与C-BF的AP列表是可选的。
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发送的第二响应帧，所述第二响应帧包括所述第三AP反馈的CSI信息。
在一些实施例中，所述第二响应帧或称CSI上报帧、CSI响应帧，或者，也可以采用其他类似命名，本申请对此不作限定。
在一些实施例中，所述第二响应帧是所述至少一个第三AP同步或异步发送的。
例如，在所述第二请求帧通过广播或组播方式发送时，所述第一AP接收所述至少一个第三AP同步发送的第二响应帧。
又例如，在所述第二请求帧通过单播方式发送时，所述第一AP接收所述至少一个第三AP异步发送的第二响应帧。
在一些实施例中，所述第二响应帧包括所述第三AP获得的第一类CSI和/或所述第三AP获得的 第二类CSI。即第三AP仅反馈有效CSI。
例如，所述第三AP可以根据所述目标信息剔除预存的CSI中的无效CSI，进一步在第二响应帧中仅包括有效CSI。
在一些实施例中，所述第一响应帧不包括CSI信息，所述第二响应帧包括所述第三AP获得的第一类CSI和所述第三AP获得的第二类CSI。
在另一些实施例中，所述第一响应帧包括所述第三AP获得的第一类CSI，所述第二响应帧包括所述第三AP获得的第二类CSI。
综上，共享AP从被共享AP获取第一CSI的方式如下：
获取方式1：从第一响应帧获取，其中，第一响应帧可以包括被共享AP获得的第一类CSI以及被共享AP和非关联的OBSS STA之间的CSI；
获取方式2：从第一响应帧和第二响应帧获取，其中，第一响应帧可以包括被共享AP获得的第一类CSI，第二响应帧包括被共享AP获得的其和非关联的参与C-BF的OBSS STA之间的CSI，即从第一响应帧获取第一类CSI，从第二响应帧获取第二类CSI。
获取方式3：从第二响应帧获取，其中，第二响应帧可以包括被共享AP获得的第一类CSI和第二类CSI。此情况下，第一响应帧不包括CSI信息。
共享AP根据从被共享AP获取的第一CSI可以得到候选CSI，进一步地，可以根据所述目标信息对候选CSI进行剔除无效CSI处理，得到目标CSI。
例如，所述共享AP根据所述目标信息剔除所述候选CSI中的如下无效CSI，得到所述目标CSI：
所述第一类AP和所述第一类AP关联的第二类STA之间的CSI；
所述第一类AP和第二类AP关联的STA之间的CSI。
在本申请一些实施例中，如图6所示，所述方法200还包括：
S220，第一AP根据所述目标CSI，确定每个第一类AP分别对应的转向矩阵。
具体地，共享AP可以从被共享AP获得第一CSI，进一步基于根据目标信息对获得的第一CSI进行剔除无效CSI处理，得到目标CSI，然后共享AP可以根据该目标CSI确定参与C-BF的AP对应的转向矩阵。也即共享AP在计算转向矩阵时，只考虑第一类AP与第一类STA之间的CSI，从而基于计算的转向矩阵进行协作传输，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。
在本申请一些实施例中，所述方法200还包括：
S230，所述第一AP向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵。
在一些实施例中，共享AP和被共享AP之间具有有线连接，共享AP可以通过有线连接将参与C-BF的被共享AP对应的转向矩阵传输给被共享AP。
在另一些实施例中，共享AP和被共享AP之间具有无线连接，共享AP可以通过信令将参与C-BF的被共享AP对应的转向矩阵传输给被共享AP。
在一些实施例中，所述第一类AP对应的转向矩阵可以是通过第一通知帧发送的。
在一些实施例中，所述第一通知帧或称协作传输通知(Coordinated TX Announce)帧，或者采用其他类似命名，本申请对此不作限定。
在一些实施例中，所述第一通知帧是通过广播或组播方式发送的，所述第一通知帧包括每个第一类AP对应的转向矩阵。
在一些实施例中，所述第一通知帧是通过单播发送的，所述第一通知帧可以包括单个第一类AP对应的转向矩阵。
结合图7至图10，以共享AP为AP1，被共享AP包括AP m和AP n为例，说明协作传输请求、协作传输响应、CSI请求帧、CSI上报帧和协作传输通知帧的交互模式。
图7和图8是共享AP分步收集被共享AP获得的CSI信息的示意性交互图，图9和图10是共享AP一次收集被共享AP获得的CSI信息的示意性交互图。其中，图7和图8分别是共享AP分步收集被共享AP获得的CSI信息时，被共享AP同步和异步响应的示意性图，图9和图10分别是共享AP一次收集被共享AP获得的CSI信息时，被共享AP同步和异步响应的示意性图。
如图7所示，共享AP向被共享AP发送协作传输请求帧，用于请求被共享AP参与C-BF模式的多AP协作传输，或者说，询问被共享AP是否参与C-BF模式的多AP协作传输，同时指示被共享AP反馈获得的第一类CSI。被共享AP接收到该协作传输请求帧后，同步回复协作传输响应帧。
例如，AP m回复协作传输响应帧指示接受共享AP的请求，该AP m还可以在协作传输响应帧中指示该AP m及其关联的STA对于C-BF的参与情况，以及所述AP m获得的AP m和参与C-BF的 关联STA之间的CSI。即AP m可以反馈第一信息和获得的第一类CSI。
又例如，AP n回复协作传输响应帧指示拒绝共享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STA对于C-BF的参与情况，因为该AP n关联的所有STA均不参与C-BF。并且AP n也不在协作传输响应帧中上报其获得的CSI。
进一步地，如图7所示，共享AP向参与C-BF的被共享AP(例如AP m)发送CSI请求帧，用于请求参与C-BF的AP反馈第二类CSI。可选地，该CSI请求帧中还可以指示AP n不参与C-BF。
AP m接收到该CSI请求帧后，回复CSI上报帧，携带AP m获得的AP m和其关联的参与C-BF的OBSS STA之间的CSI(即第二类CSI)，即AP m在CSI上报帧中所携带的CSI中不包括AP m和AP n关联的STA之间的CSI。
至此，共享AP可以获得被共享AP上报的CSI以及目标信息，进一步地，共享AP可以根据根据上述信息确定目标CSI，并根据该目标CSI确定参与C-BF的AP对应的转向矩阵。例如，根据AP m获得的第一类CSI和第二类CSI，确定AP m对应的转向矩阵。
进一步地，共享AP可以发送协作传输通知帧，将参与C-BF的被共享AP对应的转向矩阵告知参与C-BF的被共享AP。例如，共享AP向AP m发送协作传输通知帧，指示AP m对应的转向矩阵。
可选地，接收到协作传输通知帧的被共享AP可以通过确认(Ack)帧确认共享AP发送的协作传输通知帧，被共享AP也可以不发Ack帧，默认接受共享AP发送的协作传输通知帧。
如图8所示，共享AP采用单播方式向被共享AP发送协作传输请求帧，用于请求被共享AP参与C-BF模式的多AP协作传输，或者说，询问被共享AP是否参与C-BF模式的多AP协作传输，同时指示被共享AP反馈第一类CSI，被共享AP可以异步回复协作传输响应帧。
例如，共享AP向AP m发送协作传输请求帧后，AP m回复协作传输响应帧，指示接受共享AP的请求，该AP m还可以在协作传输响应帧中指示该AP m及其关联的STA对于C-BF的参与情况以及所述AP m获得的第一类CSI。即AP m可以反馈第一信息和获得的第一类CSI。
又例如，共享AP向AP n发送协作传输请求帧后，AP n回复协作传输响应帧，指示拒绝共享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STA对于C-BF的参与情况，因为该AP n关联的所有STA均不参与C-BF。并且AP n也不在协作传输响应帧中上报其获得的CSI。
进一步地，如图8所示，共享AP向参与C-BF的被共享AP(例如AP m)发送CSI请求帧，用于请求参与C-BF的AP反馈第二类CSI。可选地，该CSI请求帧中还可以指示AP n不参与C-BF。
AP m接收到该CSI请求帧后，回复CSI上报帧，携带AP m获得的AP m和其关联的参与C-BF的OBSS STA之间的CSI(即第二类CSI)，即AP m在CSI上报帧中所携带的CSI中不包括AP m和AP n关联的STA之间的CSI。
至此，共享AP可以获得被共享AP上报的CSI以及目标信息，进一步地，共享AP可以根据根据上述信息确定目标CSI，并根据该目标CSI确定参与C-BF的AP对应的转向矩阵。例如，根据AP m获得的第一类CSI和第二类CSI，确定AP m对应的转向矩阵。
进一步地，共享AP可以发送协作传输通知帧，将参与C-BF的被共享AP对应的转向矩阵告知参与C-BF的被共享AP。例如，共享AP向AP m发送协作传输通知帧，指示AP m对应的转向矩阵。
可选地，接收到协作传输通知帧的被共享AP可以通过确认(Ack)帧确认共享AP发送的协作传输通知帧，被共享AP也可以不发Ack帧，默认接受共享AP发送的协作传输通知帧。
如图9所示，共享AP可以向被共享AP发送协作传输请求帧，用于请求被共享AP参与C-BF模式的多AP协作传输，或者说，询问被共享AP是否参与C-BF模式的多AP协作传输，同时指示被共享AP反馈获得的第一类CSI以及被共享AP和非关联的OBSS STA之间的CSI。被共享AP接收到该协作传输请求帧后，同步回复协作传输响应帧。
例如，AP m回复协作传输响应帧，指示接受共享AP的请求，该AP m还可以在协作传输响应帧中指示该AP m及其关联的STA对于C-BF的参与情况以及所述AP m获得的第一类CSI以及被共享AP和非关联的OBSS STA之间的CSI。
又例如，AP n回复协作传输响应帧，指示拒绝共享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STA对于C-BF的参与情况，因为该AP n关联的所有STA均不参与C-BF。并且，AP n也不在协作传输响应帧中上报其获得的CSI。
至此，共享AP可以获得被共享AP上报的CSI以及目标信息，进一步地，共享AP可以根据根据上述信息确定目标CSI，并根据该目标CSI确定参与C-BF的AP对应的转向矩阵。例如，根据AP m获得的第一类CSI和第二类CSI，确定AP m对应的转向矩阵。
进一步地，共享AP可以发送协作传输通知帧，将参与C-BF的被共享AP对应的转向矩阵告知 参与C-BF的被共享AP。例如，共享AP向AP m发送协作传输通知帧，指示AP m对应的转向矩阵。
可选地，接收到协作传输通知帧的被共享AP可以通过确认(Ack)帧确认共享AP发送的协作传输通知帧，被共享AP也可以不发Ack帧，默认接受共享AP发送的协作传输通知帧。
如图10所示，共享AP采用单播方式向被共享AP发送协作传输请求帧，用于请求被共享AP参与C-BF模式的多AP协作传输，或者说，询问被共享AP是否参与C-BF模式的多AP协作传输，同时指示被共享AP反馈获得的第一类CSI以及被共享AP和OBSS STA之间的CSI，被共享AP可以异步回复协作传输响应帧。
例如，共享AP向AP m发送协作传输请求帧后，AP m回复协作传输响应帧，指示接受共享AP的请求，该AP m还可以在协作传输响应帧中指示该AP m及其关联的STA对于C-BF的参与情况以及所述AP m获得的第一类CSI以及被共享AP和非关联的OBSS STA之间的CSI。
又例如，共享AP向AP n发送协作传输请求帧后，AP n回复协作传输响应帧，指示拒绝共享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STA对于C-BF的参与情况，因为该AP n关联的所有STA均不参与C-BF，并且AP n也不在协作传输响应帧中上报其获得的CSI。
至此，共享AP可以获得被共享AP上报的CSI以及目标信息，进一步地，共享AP可以根据根据上述信息确定目标CSI，并根据该目标CSI确定参与C-BF的AP对应的转向矩阵。例如，根据AP m获得的第一类CSI和第二类CSI，确定AP m对应的转向矩阵。
进一步地，共享AP可以发送协作传输通知帧，将参与C-BF的被共享AP对应的转向矩阵告知参与C-BF的被共享AP。例如，共享AP向AP m发送协作传输通知帧，指示AP m对应的转向矩阵。
可选地，接收到协作传输通知帧的被共享AP可以通过确认(Ack)帧确认共享AP发送的协作传输通知帧，被共享AP也可以不发Ack帧，默认接受共享AP发送的协作传输通知帧。
结合图11的具体示例，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11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，共享AP发送协作传输请求帧，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。被共享AP回复协作传输响应帧，例如，同步或异步回复协作传输响应。
可选地，在准备阶段，共享AP还可以发送CSI请求帧(图11未示出)，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CSI上报帧，例如，同步或异步回复。具体的交互模式参考图7至图10的相关说明。
以下，结合具体的交互模式，说明参与情况信息和CSI信息的上报方式。
实施例一：准备阶段不包括CSI请求帧和CSI上报帧的交互，CSI通过协作传输响应帧获取，对应前述获取方式1。具体的交互模式参考图9和图10的相关说明。
例如，如果被共享AP参加C-BF，则在协作传输响应帧中携带以下信息：
与该被共享AP关联的STA列表(可选的)；
与该被共享AP关联的参与C-BF的STA列表(强制的)；
该被共享AP与关联的参加C-BF的STA之间的CSI(即剔除了该Shared AP与其关联的不参加C-BF的STA之间的CSI；
该被共享AP与非关联的OBSS STA之间的CSI。
又例如，如果被共享AP不参加C-BF，则在协作传输响应帧帧中携带以下信息：
与该被共享AP关联的STA列表(可选的)。
进一步地，共享AP基于收集到的上述CSI，计算各个参与C-BF的AP对应的转向矩阵。
例如，如果共享AP收集到以下信息：
1)、各个参与C-BF的被共享AP(例如AP 1和AP m)所关联的STA列表(可选的)；
2)、各个参与C-BF的被共享AP所关联的参与C-BF的STA列表(强制的)，例如：
与AP 1关联的STA 1-i参加C-BF；
与AP m关联的STA m-i参加C-BF；
3)各个被共享AP与其关联的参加C-BF的STA之间的CSI，例如：
AP 1和STA 1-i之间的CSI，即H(1,1-i)；
AP m和STA m-i之间的CSI，即H(m,m-i)；
4)各个被共享AP与非关联的OBSS STA之间的CSI，例如：
AP 1和STA m-i之间的CSI，即H(1,m-i)，以及AP 1和STA n-i之间的CSI，即H(1,n-i)；
AP m和STA 1-i之间的CSI，即H(m,1-i)，以及AP m和STA n-i之间的CSI，即H(m,n-i)。
然后，共享AP计算参加C-BF的AP(例如AP 1和AP m)对应的转向矩阵时，需要将表1中如下无效CSI信息剔除：
1)参与C-BF的AP与其关联的不参与C-BF的STA之间的CSI，例如：
计算AP 1的转向矩阵时，剔除表1中H(1,1-i)和H(1,m-i)之外的其它CSI信息；
计算AP m的转向矩阵时，剔除表1中H(m,1-i)和H(m,m-i)之外的其它CSI信息；
2)参与C-BF的AP与不参与C-BF的AP(例如AP n)关联的STA(例如STA n-i)之间的CSI。
例如：计算AP 1对应的转向矩阵时，剔除表1中的H(1,n-i)，计算AP m的转向矩阵时，剔除表1中的H(m,n-i)。
进一步地，共享AP在计算AP 1对应的转向矩阵时，可以使用CSI信息(H(1,1-i)和H(1,m-i))计算AP 1对应的C-BF转向矩阵，共享AP在计算AP m对应的转向矩阵时，可以使用CSI信息(H(m,1-i)和H(m,m-i))，计算AP m对应的C-BF转向矩阵。
实施例二：准备阶段包括CSI请求帧和CSI上报帧的交互，CSI通过协作传输响应帧和CSI上报帧获取，对应前述获取方式2。具体的交互模式参考图7和图8的相关说明。
例如，如果被共享AP参加C-BF，则在协作传输响应帧帧中携带以下信息：
与该被共享AP关联的STA列表(可选的)；
与该被共享AP关联的参与C-BF的STA列表(强制的)；
该被共享AP与关联的参加C-BF的STA之间的CSI(即剔除了该被共享AP与其关联的不参加C-BF的STA之间的CSI，即第一类CSI。
又例如，如果被共享AP不参加C-BF，则在协作传输响应帧帧中携带以下信息：
与该被共享AP关联的STA列表(可选的)。
在准备阶段，共享AP可以发送CSI Request帧给参加C-BF的被共享AP，请求被共享AP上报该AP和参与C-BF的OBSS STA之间的CSI(即第二类CSI)，此外，CSI Request帧还可以携带目标信息。
被共享AP回复CSI Report给共享AP，其中，CSI Report帧中携带该被共享AP与参与C-BF的OBSS STA之间的CSI。即被共享AP会剔除其与不参与C-BF的OBSS STA之间的CSI。
进一步地，共享AP基于收集到的上述CSI，计算各个参与C-BF的AP对应的转向矩阵。
作为示例，共享AP收集到以下信息：
1)、各个参与C-BF的被共享AP(例如AP 1和AP m)所关联的STA列表(可选的)；
2)、各个参与C-BF的被共享AP所关联的参与C-BF的STA列表(强制的)，例如：
与AP 1关联的STA 1-i参加C-BF；
与AP m关联的STA m-i参加C-BF；
3)各个被共享AP与其关联的参加C-BF的STA之间的CSI，例如：
AP 1和STA 1-i之间的CSI，即H(1,1-i)；
AP m和STA m-i之间的CSI，即H(m,m-i)；
4)各个被共享AP与非关联的参与C-BF的OBSS STA之间的CSI，例如：
AP 1和STA m-i之间的CSI，即H(1,m-i)；
AP m和STA 1-i之间的CSI，即H(m,1-i)；
然后共享AP在计算AP 1对应的转向矩阵时，可以使用CSI信息(H(1,1-i),H(1,m-i))计算AP 1对应的C-BF转向矩阵，共享AP在计算AP m对应的转向矩阵时，可以使用CSI信息(H(m,1-i),H(m,m-i))计算AP m对应的C-BF转向矩阵。
实施例三：准备阶段包括CSI请求帧和CSI上报帧的交互，CSI通过CSI上报帧获取，对应前述获取方式3。具体的交互模式参考图7和图8的相关说明。
与实施例二不同的是，所述协作传输响应帧中不包括CSI信息，CSI上报帧中包括AP获得的第一类CSI和第二类CSI，此情况下，共享AP可以根据实施例二中所述的方式计算参与C-BF的AP对应的转向矩阵。
应理解，本申请对于C-BF转向矩阵计算的方法不作限定。但C-BF转向矩阵计算的原则是使得该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)的信号质量进行削弱(即发送信号的零陷对准非关联的参与C-BF的STA)。
可选地，本申请实施例的C-BF模式的多AP协作传输可以适用于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AP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，此时需要重新进行全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。
值得注意的是，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。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。
在计算得到参与C-BF的AP对应的转向矩阵后，共享AP可以通过协作传输通知帧将每个参与C-BF的转向矩阵发送给各个参与C-BF的被共享AP。
三、协作传输阶段
在协作传输阶段，共享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的被共享AP按照根据共享AP通知的转向矩阵发送数据。
可选地，各个STA接收到AP发送的数据之后回复块确认(Block Acknowledgement，BA)帧。
应理解，图11仅以MAP和共享AP为同一AP作为示例，在其他实施例中，MAP和共享AP也可以为不同的AP，本申请对此不作限定。
在本申请一些实施例中，共享AP也可以在协作传输阶段向每个参与C-BF的AP通知每个参与C-BF的转向矩阵，此情况下，在准备阶段，共享AP可以不发送协作传输通知帧，例如，共享AP可以在协作传输触发帧中携带每个参与C-BF的转向矩阵，进一步地，参与C-BF的被共享AP可以根据其对应的转向矩阵进行数据传输。也就是省掉了共享AP发送协作传输通知和被共享AP回复应答(可选)的步骤。
即，在协作传输阶段，共享AP使用协作传输触发帧实现协作传输通知帧的功能。此情况下，协作传输触发帧格式设计和协作传输通知帧的帧格式设计类似。
图12和图13是通过协作传输触发帧实现协作传输通知帧功能的示意性交互图。其中，在图12中的准备阶段，被共享AP可以同步回复共享AP的协作传输请求帧，在图13中的准备阶段，被共享AP可以异步回复共享AP的协作传输请求帧。应理解，在准备阶段，共享AP可以分步收集被共享AP获得的CSI，或者，也可以一次收集被共享AP获得的CSI，即，图12和图13的准备阶段的交互方式也可以采用图7和图8中的交互方式，这里不再赘述。
以下，结合图14至图24，说明协作传输请求帧、协作传输响应帧、CSI请求帧、CSI上报帧和 协作传输通知帧的帧格式设计。
应理解，图14至图24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，本申请对此不作限定。
图14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14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，即用于承载前述第一指示信息；
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15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。
在一些实施例中，如图16所示，所述C-BF命令字段包括如下至少一个字段：
上报关联STA的CSI(Report CSI from Associated STAs)字段，用于指示是否反馈所述第二AP获得的第一类CSI，即用于承载前述第二指示信息；
上报OBSS STA的CSI(Report CSI from OBSS STAs)字段，用于指示是否反馈所述第二AP获得的第二AP和非关联的OBSS STA之间的CSI，即用于承载前述第三指示信息。
在一些实施例中，Report CSI from Associated STAs字段取值为1指示Shared AP反馈与其关联的参与C-BF的STA之间的CSI，取值为0指示Shared AP不反馈与其关联的参与C-BF的STA之间的CSI。
在一些实施例中，Report CSI from OBSS STAs字段取值为1指示Shared AP反馈与非关联的 OBSS STA之间的CSI，取值为0指示Shared AP不反馈与非关联的OBSS STA之间的CSI。
图17至图19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。
如图17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 Response)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，如图17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)，用于指示所述第二AP与C-BF相关的信息；
C-OFDMA信息字段(C-OFDMA Info.field)，用于指示所述第二AP与C-OFDMA相关的信息；
C-SR信息字段(C-SR Info.field)，用于指示所述第二AP与C-SR相关的信息；
J-TX信息字段(J-TX Info.field)，用于指示所述第二AP与J-TX相关的信息；
C-UL MU MIMO信息字段(C-UL MU-MIMO Info.field)，用于指示所述第二AP与C-UL MU MIMO相关的信息。
在一些实施例中，如图18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19所示，所述C-BF信息字段包括以下至少一个字段：
参与C-BF的关联STA列表字段(Associated STA List for C-BF subfield)，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；
不参与C-BF的关联STA列表字段(Associated STA List for no C-BF subfield)，用于指示所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段(CSI Information field)，用于指示所述第二AP获得的第一类CSI和/或所述第二AP获得的第二AP和非关联的OBSS STA之间的CSI。
在一些实施例中，如图19所示，Associated STA List for C-BF subfield包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示第二AP关联的参与C-BF的STA的数目；
至少一个STA ID字段，其中，k th STA ID用于指示第二AP关联的参与C-BF的第k个STA的ID。
在一些实施例中，如图19所示，Associated STA List for no C-BF subfield包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示第二AP关联的不参与C-BF的STA 的数目；
至少一个STA ID字段，其中，d th STA ID用于指示第二AP关联的不参与C-BF的第d个STA的ID。
可选的，C-BF Accept字段取值为1时，所述协作传输响应帧包括CSI Information field，C-BF Accept字段取值为0时，所述协作传输响应帧不包括CSI Information field。
在一些实施例中，如果协作传输请求帧的Report CSI from Associated STAs字段取值为1，则协作传输响应帧携带被共享AP获得的第一类CSI，否则不携带；如果Report CSI from OBSS STAs取值为1，则协作传输响应帧携带被共享AP与非关联的OBSS STA之间的CSI，否则不携带。
在一些实施例中，CSI Information field长度x满足Coordinated TX Response帧不超过11454字节，否则，需要对协作传输响应帧进行分片处理。
图20是本申请实施例提供的一种CSI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)、CSI请求(CSI 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20所示，所述CSI请求字段包括以下至少一个字段：
CSI请求命令(CSI Request Command)字段，用于指示请求所述第三AP反馈第一类CSI和/或第二类CSI；
AP数量(Number of APs)字段，用于指示CSI请求帧中包括的AP的数量；
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信息(AP’s Associated STAs Info)字段，每个关联STA信息字段对应所述至少一个AP ID字段所指示的一个AP，所述每个关联STA信息字段用于指示对应的AP关联的参与C-BF的STA和/或不参与C-BF的STA。
在一些实施例中，CSI Request Command字段取值为0，表示共享AP请求被共享AP反馈该被共享AP和参与C-BF的OBSS STA之间的CSI，CSI Request Command字段取值为1，表示共享AP请求被共享AP反馈该被共享AP和其关联的参与C-BF的STA之间的CSI以及该被共享AP和参与C-BF的OBSS STA之间的CSI。
在一些实施例中，如图20所示，所述至少一个AP ID字段可以包括第一个AP ID(1 st AP ID)字段，……，第m个AP ID(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。
在一些实施例中，如图20所示，所述至少一个关联STA列表字段可以包括第一个AP的STA信息(1 st AP’s Associated STAs Info)字段，……，第m个AP关联的STA列表(m th AP’s Associated STAs Info)字段等，1 st AP’s Associated STAs Info字段指示第1个参与C-BF的AP关联的参与C-BF的STA和/或不参与C-BF的STA，m th AP’s Associated STAs Info指示第m个参与C-BF的AP关联的参与C-BF的STA和/或不参与C-BF的STA。
在一些实施例中，如图20所示，每个关联STA信息字段包括如下至少一个字段：
参与C-BF的关联STA列表(Associated STA List for C-BF)字段，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；
不参与C-BF的关联STA列表(Associated STA List for no C-BF)字段，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
在一些实施例中，如图20所示，每个Associated STA List for C-BF字段包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示对应的AP下关联的参与C-BF的STA的数目；
至少一个STA ID字段，其中，k th STA ID用于指示对应的AP关联的第k个参与C-BF的STA的ID。
在一些实施例中，如图20所示，Associated STA List for no C-BF字段包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示对应的AP下关联的不参与C-BF的STA的数目；
至少一个STA ID字段，其中，d th STA ID用于指示对应的AP关联的第d个不参与C-BF的STA的ID。
图21是本申请实施例提供的一种CSI上报帧的帧格式示意图，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)、CSI上报(CSI Report)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，如图21所示，所述CSI上报字段可以包括CSI信息字段(CSI Information field)，用于承载被AP上报的CSI信息。
例如，所述CSI信息字段用于承载被共享AP与非关联的OBSS STA之间的CSI，或者，也可以用于承载被共享AP和关联的参与C-BF的STA之间的CSI，以及被共享AP与非关联的OBSS STA之间的CSI。
在一些实施例中，CSI Information field长度x满足CSI上报帧不超过11454字节，否则，需要对CSI上报帧进行分片处理。
图22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，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)、协作传输通知(Coordinated TX Announce)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，如图22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；
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；
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，如图23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，如图24所示，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，用于指示协作传输通知帧中包括的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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
在一些实施例中，如图24所示，所述至少一个AP ID字段可以包括第一个AP ID(1 st AP ID)字段，……，第m个AP ID(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。
在一些实施例中，如图24所示，所述至少一个转向矩阵字段可以包括第一个AP的转向矩阵(TX Matrix for 1 st AP)字段，……，第m个AP的转向矩阵(TX Matrix for m th AP)字段等，TX Matrix for1st AP字段指示第1个参与C-BF的AP对应的转向矩阵，TX Matrix for m th AP指示第m个参与C-BF的AP对应的转向矩阵。
在本申请一些实施例中，参与C-BF的AP对应的转向矩阵也可以是由主AP计算的。
在一些实施例中，共享AP在确定目标CSI之后，将该目标CSI发送给主AP，由主AP根据该目标CSI计算参与C-BF的AP对应的转向矩阵，具体计算方法参考前述实施例的相关描述，为了简洁，这里不再赘述。
在另一些实施例中，共享AP可以将用于计算目标CSI的候选CSI以及所述目标信息发送给主AP，由主AP根据该候选CSI和目标信息计算参与C-BF的AP对应的转向矩阵。
例如，共享AP在收集完被共享AP反馈的CSI信息之后，可以将收集到的该CSI发送给主AP。
可选的，如果共享AP也参与C-BF，共享AP也可以将该共享AP获得的CSI发送给主AP。例如将共享AP和其关联的参与C-BF的STA之间的CSI以及共享AP和非关联的OBSS STA之间的CSI发送给主AP。
即，所述共享AP可以向主AP发送目标CSI，或者，也可以向主AP发送候选CSI和目标信息。
在一些实施例中，共享AP和主AP之间具有有线连接，所述目标CSI或所述候选CSI可以是通过有线连接传输的。
在一些实施例中，共享AP和主AP之间具有无线连接，所述目标CSI或所述候选CSI可以是通过无线连接传输的。
在一些实施例中，所述候选CSI和目标信息可以是通过第三请求帧发送的。
在一些实施例中，所述第三请求帧可以用于承载所述目标CSI。
在一些实施例中，所述第三请求帧或称协作传输矩阵请求(Coordinated TX Matrix Request)帧，或者采用其他类似命名，本申请对此不作限定。
在一些实施例中，所述候选CSI可以包括从被共享AP获得的第一CSI(共享AP不参与C-BF)，或者包括从被共享AP获得的第一CSI以及共享AP获得的CSI(共享AP参与C-BF)，例如，共享AP和其关联的参与C-BF的STA之间的CSI以及共享AP和非关联的OBSS STA之间的CSI。
在一些实施例中，所述目标信息的指示方式参考前述实施例的相关描述，为了简洁，这里不再赘述。
在一些实施例中，主AP根据所述目标信息剔除候选CSI中的如下CSI，得到目标CSI：
所述第一类AP和所述第一类AP关联的第二类STA之间的CSI；
所述第一类AP和第二类AP关联的STA之间的CSI。
在一些实施例中，所述主AP根据所述目标CSI计算得到每个第一类AP对应的转向矩阵之后，可以将所述每个第一类AP对应的转向矩阵发送给共享AP。
在一些实施例中，共享AP和主AP之间具有有线连接，所述每个第一类AP对应的转向矩阵可以是通过有线连接传输的。
在一些实施例中，共享AP和主AP之间具有无线连接，所述每个第一类AP对应的转向矩阵可以是通过无线连接传输的。
进一步地，共享AP可以将所述每个第一类AP对应的转向矩阵发送给所述每个第一类AP，例如通过前述第一通知帧将每个第一类AP对应的转向矩阵发送给所述每个第一类AP。
在一些实施例中，所述主AP可以通过第三响应帧携带主AP计算得到的每个第一类AP对应的转向矩阵。
在一些实施例中，所述第三响应帧或称协作传输矩阵响应(Coordinated TX Matrix Response)帧，或者采用其他类似命名，本申请对此不作限定。
在另一些实施例中，所述主AP根据所述目标CSI计算得到每个第一类AP对应的转向矩阵之后，可以将所述每个第一类AP对应的转向矩阵发送给所述每个第一类AP。
在一些实施例中，被共享AP和主AP之间具有有线连接，所述每个第一类AP对应的转向矩阵可以是通过有线连接传输的。
在一些实施例中，被共享AP和主AP之间具有无线连接，所述每个第一类AP对应的转向矩阵可以是通过无线连接传输的。
在一些实施例中，主AP可以通过第二通知帧将每个第一类AP对应的转向矩阵发送给所述每个第一类AP。其中，第二通知帧可以采用第一通知帧类似的帧格式设计，这里不作赘述。
在一些实施例中，所述第二通知帧可以为协作传输触发帧。
例如，主AP根据所述目标CSI计算得到每个第一类AP对应的转向矩阵之后，可以在协作传输阶段向每个参与C-BF的AP通知每个参与C-BF的转向矩阵，此情况下，在准备阶段，主AP可以不发送协作传输通知帧，例如，主AP可以在协作传输触发帧中携带每个参与C-BF的转向矩阵，进一步地，参与C-BF的被共享AP可以根据其对应的转向矩阵进行数据传输。也就是省掉了协作传输通知和应答(可选)的步骤。
结合图25至图32，以共享AP为AP1，被共享AP包括AP m和AP n为例，说明协作传输矩阵请求帧、协作传输响应帧和协作传输通知帧的交互模式。
在图25和图26中，共享AP通过协作传输响应帧一次收集被共享AP获得的CSI信息，图25和图26的区别在于，被共享AP同步和异步回复协作传输响应帧。
可选地，在图25和图26中，共享AP也可以分步收集被共享AP获得的CSI信息，具体的交互模式参考图7和图8所示实施例的相关描述，为了简洁，这里不再赘述。
进一步地，如图25和图26所示，共享AP收集到被共享AP的CSI信息之后，可以向主AP发送协作传输矩阵请求帧，用于请求主AP计算参与C-BF的AP对应的转向矩阵。
可选地，所述协作传输矩阵请求帧可以携带收集的CSI和前述目标信息，主AP根据该目标信息在收集的CSI中确定目标CSI，然后基于该目标CSI确定参与C-BF的AP对应的转向矩阵。
可选地，所述协作传输矩阵请求帧可以携带目标CSI，主AP直接可以根据该目标CSI确定参与C-BF的AP对应的转向矩阵。
主AP计算得到每个参与C-BF的AP对应的转向矩阵后，可以向共享AP发送每个参与C-BF的AP对应的转向矩阵。
例如，AP m参与C-BF，主AP可以向共享AP发送协作传输矩阵响应帧，该协作传输响应帧包括AP m对应的转向矩阵。
进一步地，共享AP可以向参与C-BF的AP发送协作传输通知帧，将参与C-BF的AP对应的转向矩阵告知参与C-BF的AP。例如，共享AP向AP m发送协作传输通知帧，指示AP m对应的转向矩阵。
可选地，接收到协作传输通知帧的被共享AP可以通过确认(Ack)帧确认共享AP发送的协作传输通知帧，被共享AP也可以不发Ack帧，默认接受共享AP发送的协作传输通知帧。
在图27和图28中，共享AP通过协作传输响应帧一次收集被共享AP获得的CSI信息，图27和图28的区别在于，被共享AP同步和异步回复协作传输响应帧。
可选地，在图27和图28中，共享AP也可以分步收集被共享AP获得的CSI信息，具体的交互模式参考图7和图8所示实施例的相关描述，为了简洁，这里不再赘述。
图27和图28与图25和图26的区别在于：主AP计算得到每个参与C-BF的AP对应的转向矩阵后，可以直接通过协作传输矩阵响应帧向参与C-BF的AP发送每个参与C-BF的AP对应的转向矩阵。即省去了主AP先通过协作传输矩阵响应帧向共享AP发送每个参与C-BF的AP对应的转向矩阵的步骤，而是由主AP直接通知计算得到的转向矩阵。
在图29和图30中，共享AP通过协作传输响应帧一次收集被共享AP获得的CSI信息，图29和图30的区别在于，被共享AP同步和异步回复协作传输响应帧。
可选地，在图29和图30中，共享AP也可以分步收集被共享AP获得的CSI信息，具体的交互模式参考图7和图8所示实施例的相关描述，为了简洁，这里不再赘述。
图29和图30与图25和图26的区别在于：共享AP通过协作传输矩阵响应帧获知每个参与C-BF的AP对应的转向矩阵之后，可以在协作传输阶段，向每个参与C-BF的AP发送每个参与C-BF的AP对应的转向矩阵，即省去了共享AP发送协作传输通知和被共享AP回复应答(可选)的步骤。
在图31和图32中，共享AP通过协作传输响应帧一次收集被共享AP获得的CSI信息，图31和图32的区别在于，被共享AP同步和异步回复协作传输响应帧。
可选地，在图31和图32中，共享AP也可以分步收集被共享AP获得的CSI信息，具体的交互模式参考图7和图8所示实施例的相关描述，为了简洁，这里不再赘述。
图31和图32与图29和图30的区别在于：主AP计算得到每个参与C-BF的AP对应的转向矩阵后，可以在协作传输阶段通知每个参与C-BF的AP对应的转向矩阵，例如，通过协作传输触发帧携带每个参与C-BF的AP对应的转向矩阵。即省去了准备阶段中协作传输矩阵响应帧、协作传输通知帧和被共享AP回复应答(可选)的步骤。
即，在图31和图32中，合并了协作传输通知帧和协作传输触发帧。
以下，结合图33和图34说明协作传输矩阵请求帧和协作传输矩阵响应帧的帧结构设计。
应理解，图33和图34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，本申请对此不作限定。
图33是本申请实施例提供的一种协作传输矩阵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)、RA(占用6个字节)、TA(占用6个字节)、协作传输矩阵请求(Coordinated TX Matrix Request)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，所述协作转向矩阵请求字段包括以下至少一个字段：
AP信息数量字段，用于指示协作传输矩阵请求帧携带的AP信息的数量；
至少一个AP信息(APs’Info)字段，用于指示参与C-BF模式的多AP协作传输的AP信息。
在一些实施例中，如图33所示，所述AP信息字段包括以下至少一个字段：
AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP；
参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段(CSI Information field)，用于指示所述AP ID字段指示的AP获得的CSI。
在一些实施例中，CSI信息字段用于指示所述AP ID字段指示的AP获得的第一类CSI和/或第二类CSI。即，所述CSI信息字段携带的CSI均为有效CSI，此情况下，AP信息字段可以不包括参与C-BF的关联STA列表字段和不参与C-BF的关联STA列表字段，也即不需要主AP剔除无效CSI处理。
在一些实施例中，CSI信息字段携带的CSI包括有效CSI和无效CSI。
例如，CSI信息字段用于指示所述AP ID字段指示的AP获得的第一类CSI和/或该AP和非关联的OBSS STA之间的CSI。
此情况下，AP信息字段可以包括参与C-BF的关联STA列表字段和/或不参与C-BF的关联STA列表字段，主AP可以根据STA的参与情况，进行剔除无效CSI处理以得到目标CSI。
在一些实施例中，如图33所示，Associated STA List for C-BF subfield包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示AP关联的参与C-BF的STA的数目；
至少一个STA ID字段，其中，k th STA ID用于指示第二AP关联的参与C-BF的第k个STA的ID。
在一些实施例中，如图33所示，Associated STA List for no C-BF subfield包括如下至少一个字段：
关联STA数(Number of Associated STAs)字段，用于指示AP关联的不参与C-BF的STA的数目；
至少一个STA ID字段，其中，d th STA ID用于指示AP关联的不参与C-BF的第d个STA的ID。
在一些实施例中，CSI Information field长度x满足协作传输矩阵请求帧不超过11454字节，否则，需要对协作传输矩阵请求帧进行分片处理。
图34是本申请实施例提供的一种协作传输矩阵响应帧的帧格式示意图，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)、RA(占用6个字节)、TA(占用6个字节)、协作传输矩阵响应(Coordinated TX Matrix Response)(占用字节数可变(variable))、FCS(占用4个字节)。
在一些实施例中，所述协作转向矩阵响应字段包括以下至少一个字段：
转向矩阵数量(Number of APs’TX Matrix)字段，用于指示协作转向矩阵响应帧携带的AP的转向矩阵的数量；
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，n th AP ID代表第n个AP的ID；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
在一些实施例中，如图34所示，所述至少一个AP ID字段可以包括第一个AP ID(1 st AP ID)字段，……，第m个AP ID(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。
在一些实施例中，如图34所示，所述至少一个转向矩阵字段可以包括用于第一个AP的转向矩阵(TX Matrix for 1 st AP)字段，……，用于第m个AP的转向矩阵(TX Matrix for m th AP)字段等，TX Matrix for 1st AP字段指示第1个参与C-BF的AP对应的转向矩阵，TX Matrix for m th AP指示第m个参与C-BF的AP对应的转向矩阵。
在本申请一些实施例中，共享AP和被共享AP也可以向MAP上报CSI信息。进一步由MAP计算转向矩阵。
例如，在被共享AP和MAP以及共享AP和MAP之间通过有线回程进行连接的情况下，被共享AP和共享AP可以通过有线回程向MAP传输CSI信息。
又例如，在被共享AP和MAP以及共享AP和MAP之间通过无线回程进行连接的情况下，被共享AP和共享AP可以通过无线回程向MAP传输CSI信息。
在一些实施例中，所述被共享AP可以向MAP上报通过信道探测获得的全部CSI(包括有效CSI和无效CSI)，或者，也可以向MAP上报其获得的第一类CSI以及被共享AP与非关联的OBSS STA之间的CSI。
在一些实施例中，所述共享AP可以向MAP上报通过信道探测获得的全部CSI(包括有效CSI和无效CSI)，或者，也可以向MAP上报其获得的第一类CSI以及被共享AP与非关联的OBSS STA之间的CSI。
在一些实施例中，共享AP也可以向MAP上报所述共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
例如，在共享AP和MAP之间通过有线回程进行连接的情况下，共享AP可以通过有线回程向MAP上报所述共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
又例如，在共享AP和MAP之间通过无线回程进行连接的情况下，共享AP可以通过无线回程向MAP上报所述共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
在一些实施例中，被共享AP也可以向MAP上报所述被共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
例如，在不共享AP和MAP之间通过有线回程进行连接的情况下，被共享AP可以通过有线回程向MAP上报所述被共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
又例如，在被共享AP和MAP之间通过无线回程进行连接的情况下，被共享AP可以通过无线回程向MAP上报所述被共享AP对于C-BF的参与情况信息及其关联的STA对于C-BF的参与情况信息。
进一步地，MAP可以根据获得的CSI信息结合上述参与情况信息，计算每个参与C-BF的AP对应的转向矩阵，具体计算方式参考前述实施例的相关描述，这里不再赘述。
在一些实施例中，所述MAP在计算得到每个参与C-BF的AP(在共享AP也参与C-BF的情况下，也包括共享AP)对应的转向矩阵之后，可以向每个参与C-BF的AP发送每个参与C-BF的AP对应的转向矩阵。
例如，在参与C-BF的AP和MAP之间通过有线回程进行连接的情况下，MAP可以通过有线回程将每个参与C-BF的AP对应的转向矩阵发送给每个参与C-BF的AP。
又例如，在参与C-BF的AP和MAP之间通过无线回程进行连接的情况下，MAP可以通过无线回程将每个参与C-BF的AP对应的转向矩阵发送给每个参与C-BF的AP。
在另一些实施例中，所述MAP在计算得到每个参与C-BF的AP(在共享AP也参与C-BF的情况下，也包括共享AP)对应的转向矩阵之后，可以向共享AP发送每个参与C-BF的AP对应的转向矩阵。
例如，在共享AP和MAP之间通过有线回程进行连接的情况下，MAP可以通过有线回程将每个参与C-BF的AP对应的转向矩阵传输给共享AP。
又例如，在共享AP和MAP之间通过无线回程进行连接的情况下，MAP可以通过无线回程将每个参与C-BF的AP对应的转向矩阵传输给共享AP。
在一些实施例中，共享AP可以向参与C-BF的被共享AP发送每个参与C-BF的被共享AP对应的转向矩阵(该转向矩阵可以是共享AP计算得到的，或者也可以是MAP计算得到的)。
例如，在共享AP和被共享AP之间通过有线回程进行连接的情况下，共享AP可以通过有线回程将每个参与C-BF的被共享AP对应的转向矩阵传输给每个参与C-BF的被共享AP。
又例如，在共享AP和被共享AP之间通过无线回程进行连接的情况下，共享AP可以通过无线回程将每个参与C-BF的被共享AP对应的转向矩阵传输给每个参与C-BF的被共享AP。
图35所示是共享AP和被共享AP之间通过有线回程进行连接时，CSI和转向矩阵的交互示意图。例如，可以包括如下步骤：
首先，共享AP发送协作传输请求帧给每个被共享AP询问其是否参与C-BF。
接收到协作传输请求帧的各个被共享AP可以回复Ack帧，确认共享AP发送的协作传输请求帧，或者，也可以不回复Ack帧。
然后参与C-BF的被共享AP通过有线信令将前述第一信息和第一CSI发送给共享AP。
共享AP根据通过有线信令收集到的CSI信息，计算各个参与C-BF的AP的转向矩阵，然后可以通过无线信令发送给各个参与C-BF的AP。或者，共享AP也可以通过有线信令将计算得到的转向矩阵发给各个参与C-BF的AP。其中，该无线信令和有线信令包括的内容参考前述协作传输通知帧的帧结构设计，这里不再赘述。
即，共享AP可以通过有线信令收集被共享AP获得的CSI信息，并且可以通过有线信令向参与C-BF的被共享AP发送对应的转向矩阵，有利于降低无线信令开销。
图36所示是共享AP和主AP以及主AP和被共享AP之间通过有线回程进行连接时，CSI和转向矩阵的交互示意图，例如，可以包括如下步骤：
首先，共享AP发送协作传输请求帧给各个被共享AP询问其是否参与C-BF，或者，共享AP也可以通过有线信令其获得的CSI和其关联的STA的参与情况信息发送给主AP。
各个被共享AP回复协作传输响应帧给共享AP告知该被共享AP是否参与C-BF和/或所关联的参与C-BF的STA列表，或者，参与C-BF的被共享AP也可以通过有线信令将其获得的CSI和其关联的STA的参与情况信息发送给主AP；
主AP根据通过有线信令收集到的信息，计算各个参与C-BF的AP的转向矩阵，然后可以通过有线信令将各个参与C-BF的AP的转向矩阵发送给各个参与C-BF的AP。
即，被共享AP和共享AP均可以通过有线信令向MAP发送CSI信息，MAP根据CSI信息计算得到转向矩阵后，可以通过有线信令向参与C-BF的AP发送对应的转向矩阵，有利于降低无线信令开销。
应理解，图35和图36中共享AP、被共享AP以及主AP之间的信息交互方式以及交互的内容仅为示例，但本申请并不限于此，图35和图36中通过有线连接的交互方式也可以适用于前述实施例中的其他场景，本申请对此不作限定。
综上，共享AP可以收集多AP协作集合中的被共享AP及其关联的STA对于C-BF的多AP协作传输的参与情况，以及被共享AP获得的CSI信息，进一步根据该参与情况信息和获得的CSI信息确定目标CSI，然后基于该目标CSI计算参与C-BF的AP对应的转向矩阵，具体地，共享AP在计算转向矩阵时，只考虑参与C-BF的多AP协作传输的AP和STA之间的CSI，因此，基于该转向矩阵执行多AP协作传输，有利于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。
在一些实施例中，共享AP的处理能力不足时，共享AP可以将获得的CSI信息发送给主AP由主AP进行转向矩阵的计算。可选地，主AP计算得到转向矩阵后，可以将转向矩阵发送给共享AP，由共享AP将转向矩阵发送给参与C-BF的AP，或者，主AP也可以直接将计算得到的转向矩阵发送给参与C-BF的AP。
在一些实施例中，共享AP可以在准备阶段将转向矩阵发送给参与C-BF的AP，或者，也可以在协作传输阶段将转向矩阵发送给参与C-BF的AP，例如，通过协作传输触发帧将该转向矩阵发送给参与C-BF的AP。
在一些实施例中，主AP可以在准备阶段将转向矩阵发送给参与C-BF的AP，或者，也可以在协作传输阶段将转向矩阵发送给参与C-BF的AP，例如，通过协作传输触发帧将该转向矩阵发送给参与C-BF的AP。
上文结合图6至图36，详细描述了本申请的方法实施例，下文结合图37至图42，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37示出了根据本申请实施例的接入点设备400的示意性框图。如图19所示，该接入点设备400包括：
处理单元410，用于获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
在一些实施例中，所述目标CSI包括第一类CSI和/或第二类CSI，其中，所述第一类CSI包括所述第一类AP和所述第一类AP关联的第一类STA之间的CSI，所述第二类CSI包括所述第一类AP和所述第一类AP的重叠基本服务集OBSS中的第一类STA之间的CSI。
在一些实施例中，所述接入点设备为共享AP，所述目标CSI根据所述共享AP从至少一个被共享AP获取的CSI和/或所述共享AP通过信道探测获取的CSI确定。
在一些实施例中，所述共享AP从至少一个被共享AP获取的CSI是所述共享AP通过有线连接从至少一个被共享AP获取的；或者
所述共享AP从至少一个被共享AP获取的CSI是所述共享AP通过无线连接从至少一个被共享AP获取的。
在一些实施例中，所述接入点设备400包括：
通信单元，用于向所述多AP协作集合中的至少一个第二接入点设备发送第一请求帧，所述第一请求帧用于请求所述至少一个第二接入点设备参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一请求帧是通过广播、组播或单播方式发送的。
在一些实施例中，所述第一请求帧包括以下信息中的至少一个：
第一指示信息，用于指示请求使用的协作传输模式；
第二指示信息，用于指示是否反馈所述第二接入点设备获得的第一类CSI；
第三指示信息，用于指示是否反馈所述第二接入点设备获得的所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI。
在一些实施例中，所述第一请求帧包括协作传输请求字段，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协作传输所使用的命令；
协作正交频分多址接入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；
协作空间复用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；
联合传输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；
协作上行多用户多输入多输出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C-BF命令字段包括如下至少一个字段：
上报关联STA的CSI字段，用于指示是否反馈所述第二接入点设备获得的第一类CSI；
上报OBSS STA的CSI字段，用于指示是否反馈所述第二接入点设备获得的所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI。
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，用于指示所述接入点设备是否请求使用C-OFDMA模式的多AP协作传输；
使用C-SR字段，用于指示所述接入点设备是否请求使用C-SR模式的多AP协作传输；
使用J-TX字段，用于指示所述接入点设备是否请求使用J-TX模式的多AP协作传输；
使用C-UL MU MIMO字段，用于指示所述接入点设备是否请求使用C-UL MU MIMO模式的多AP协作传输。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于接收所述至少一个第二接入点设备发送的第一响应帧，所述第一响应帧用于指示所述第二接入点设备是否接受参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应帧是所述至少一个第二接入点设备同步或异步发送的。
在一些实施例中，所述第一响应帧包括以下信息中的至少一个：
第四指示信息，用于指示所述第二接入点设备是否接受请求使用的协作传输模式；
参与C-BF的关联STA列表，包括所述第二接入点设备关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表，包括所述第二接入点设备关联的不参与C-BF模式的多AP协作传输的STA；
至少一个CSI，包括所述第二接入点设备获得的第一类CSI和/或所述第二接入点设备获得的所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI。
在一些实施例中，所述第一响应帧包括协作传输响应字段，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，用于指示所述第二接入点设备接受的协作传输模式；
C-BF信息字段，用于指示所述第二接入点设备与C-BF相关的信息；
C-OFDMA信息字段，用于指示所述第二接入点设备与C-OFDMA相关的信息；
C-SR信息字段，用于指示所述第二接入点设备与C-SR相关的信息；
J-TX信息字段，用于指示所述第二接入点设备与J-TX相关的信息；
C-UL MU MIMO信息字段，用于指示所述第二接入点设备与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：
参与C-BF的关联STA列表字段，用于指示所述第二接入点设备关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表字段，用于指示所述第二接入点设备关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段，用于指示所述第二接入点设备获得的第一类CSI和/或所述第二接入点设备获得的所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI。
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，用于指示所述第二接入点设备是否接受C-BF模式的协作传输；
接受C-OFDMA字段，用于指示所述第二接入点设备是否接受C-OFDMA模式的协作传输；
接受C-SR字段，用于指示所述第二接入点设备是否接受C-SR模式的协作传输；
接受J-TX字段，用于指示所述第二接入点设备是否接受J-TX模式的协作传输；
接受C-UL MU MIMO字段，用于指示所述第二接入点设备是否接受C-UL MU MIMO模式的协作传输。
在一些实施例中，所述处理单元410还用于：
若所述第一响应帧包括所述第二接入点设备获得的所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI，根据所述多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AP关联的STA对于C-BF模式的多AP协作传输的参与情况，剔除所述第二接入点设备和所述第二接入点设备的OBSS STA之间的CSI中的如下CSI，得到所述目标CSI：
所述第二接入点设备和不参与C-BF模式的多AP协作传输的AP关联的STA之间的CSI。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于向所述多AP协作集合中的至少一个第三接入点设备发送第二请求帧，所述第二请求帧用于请求所述第三接入点设备反馈CSI信息。
在一些实施例中，所述第二请求帧是通过广播、组播或单播方式发送的。
在一些实施例中，所述第二请求帧包括以下信息中的至少一项：
第五指示信息，所述第五指示信息用于指示所述第三接入点设备反馈第一类CSI和/或第二类CSI；
AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
AP列表，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/或不参与C-BF模式的多AP协作传输的AP；
至少一个参与C-BF的关联STA列表，每个参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述参与C-BF的关联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；
至少一个不参与C-BF的关联STA列表，每个不参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述不参与C-BF的关联STA列表用于指示对应的AP关联的不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第二请求帧包括CSI请求字段，所述CSI请求字段包括以下指示一个字段：
CSI请求命令字段，用于指示请求所述第三接入点设备反馈第一类CSI和/或第二类CSI；
AP数量字段，用于指示所述第二请求帧中包括的AP的数量；
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；
至少一个参与C-BF的关联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；
至少一个不参与C-BF的关联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。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于接收所述至少一个第三接入点设备发送的第二响应帧，所述第二响应帧包括所述第三接入点设备反馈的CSI信息。
在一些实施例中，所述第二响应帧是所述至少一个第三接入点设备同步或异步发送的。
在一些实施例中，所述第二响应帧包括所述第三接入点设备获得的第一类CSI和/或所述第三接入点设备获得的第二类CSI。
在一些实施例中，所述第二响应帧包括CSI信息字段，所述CSI信息字段用于指示所述第三接入点设备获得的第一类CSI和/或所述第三接入点设备获得的第二类CSI。
在一些实施例中，所述处理单元410还用于：
根据所述目标CSI，计算所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于向主接入点设备发送所述目标CSI。
在一些实施例中，所述接入点设备通过有线连接或无线连接向所述主接入点设备发送所述目标CSI。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于所述接入点设备向所述主接入点设备发送第三请求帧，所述第三请求帧包括所述目标CSI，所述第三请求帧用于请求所述主接入点设备根据所述目标CSI计算转向矩阵。
在一些实施例中，所述第三请求帧包括协作转向矩阵请求字段，所述协作转向矩阵请求字段包括以下至少一个字段：
AP信息数量字段，用于指示所述第三请求帧携带的AP信息的数量；
至少一个AP信息字段，用于指示参与C-BF模式的多AP协作传输的AP信息。
在一些实施例中，所述AP信息字段包括以下至少一个字段：
AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP；
参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段，用于指示所述AP ID字段指示的AP获得的第一类CSI和/或第二类CSI。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于接收所述主接入点设备发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述接入点设备通过有线连接或无线连接接收所述主接入点设备发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于接收所述主接入点设备发送的第三响应帧，所述第三响应帧包括所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述第三响应帧包括协作转向矩阵响应字段，所述协作转向矩阵响应字段包括以下至少一个字段：
转向矩阵数量字段，用于指示所述第三响应帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵。
在一些实施例中，所述接入点设备通过有线连接或无线连接向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵。
在一些实施例中，所述接入点设备400还包括：
通信单元，用于发送第一通知帧，所述第一通知帧包括每个第一类AP对应的转向矩阵。
在一些实施例中，所述第一通知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每个第一类AP对应的转向矩阵。
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；
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；
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；
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；
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，用于指示所述第一通知帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
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，所述第一通知帧还用于参与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。
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接入点设备400可对应于本申请方法实施例中的第一AP或共享AP，并且接入点设备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36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38是根据本申请实施例的接入点设备500的示意性框图。图38的接入点设备500包括：
通信单元510，用于向第一接入点设备发送所述接入点设备获得的第一类信道状态信息CSI和/或第二类CSI，其中，所述接入点设备为多AP协作集合中的第一类AP，所述接入点设备获得的第一类CSI包括所述接入点设备和所述接入点设备关联的第一类站点STA之间的CSI，所述接入点设备获得的第二类CSI包括所述接入点设备和所述接入点设备的重叠基本服务集OBSS中的第一类STA之间的CSI，所述第一类AP为参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第一接入点设备为共享AP，所述接入点设备为被共享AP。
在一些实施例中，所述接入点设备获得的第一类CSI和/或第二类CSI是所述接入点设备通过有线连接发送给共享AP的。
在一些实施例中，所述接入点设备获得的第一类CSI和/或第二类CSI是所述接入点设备通过无线链路发送给共享AP的。
在一些实施例中，所述通信单元510还用于：
接收所述第一接入点设备发送第一请求帧，所述第一请求帧用于请求所述接入点设备参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一请求帧是通过广播、组播或单播方式发送的。
在一些实施例中，所述第一请求帧包括以下信息中的至少一个：
第一指示信息，用于指示请求使用的协作传输模式；
第二指示信息，用于指示是否反馈所述接入点设备获得的第一类CSI；
第三指示信息，用于指示是否反馈所述接入点设备获得的所述接入点设备和非关联的OBSS STA之间的CSI。
在一些实施例中，所述第一请求帧包括协作传输请求字段，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；
协作正交频分多址接入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；
协作空间复用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；
联合传输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；
协作上行多用户多输入多输出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C-BF命令字段包括如下至少一个字段：
上报关联STA的CSI字段，用于指示是否反馈所述接入点设备获得的第一类CSI；
上报OBSS STA的CSI字段，用于指示是否反馈所述接入点设备获得的所述接入点设备和非关联的OBSS STA之间的CSI。
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，用于指示所述第一接入点设备是否请求使用C-OFDMA模式的多AP协作传输；
使用C-SR字段，用于指示所述第一接入点设备是否请求使用C-SR模式的多AP协作传输；
使用J-TX字段，用于指示所述第一接入点设备是否请求使用J-TX模式的多AP协作传输；
使用C-UL MU MIMO字段，用于指示所述第一接入点设备是否请求使用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还用于：
向所述第一接入点设备发送的第一响应帧，所述第一响应帧用于指示所述接入点设备是否接受参与C-BF模式的多AP协作传输。
在一些实施例中，所述第一响应帧包括以下信息中的至少一个：
第四指示信息，用于指示所述接入点设备是否接受请求使用的协作传输模式；
参与C-BF的关联STA列表，包括所述接入点设备关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表，包括所述接入点设备关联的不参与C-BF模式的多AP协作传输的STA；
至少一个CSI，包括所述接入点设备获得的第一类CSI和/或所述接入点设备获得的所述接入点设备和非关联的OBSS STA之间的CSI。
在一些实施例中，所述第一响应帧包括协作传输响应字段，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，用于指示所述接入点设备接受的协作传输模式；
C-BF信息字段，用于指示所述接入点设备与C-BF相关的信息；
C-OFDMA信息字段，用于指示所述接入点设备与C-OFDMA相关的信息；
C-SR信息字段，用于指示所述接入点设备与C-SR相关的信息；
J-TX信息字段，用于指示所述接入点设备与J-TX相关的信息；
C-UL MU MIMO信息字段，用于指示所述接入点设备与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：
参与C-BF的关联STA列表字段，用于指示所述接入点设备关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表字段，用于指示所述接入点设备关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段，用于指示所述接入点设备获得的第一类CSI和/或所述接入点设备获得的第二类CSI。
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，用于指示所述接入点设备是否接受C-BF模式的协作传输；
接受C-OFDMA字段，用于指示所述接入点设备是否接受C-OFDMA模式的协作传输；
接受C-SR字段，用于指示所述接入点设备是否接受C-SR模式的协作传输；
接受J-TX字段，用于指示所述接入点设备是否接受J-TX模式的协作传输；
接受C-UL MU MIMO字段，用于指示所述接入点设备是否接受C-UL MU MIMO模式的协作传输。
在一些实施例中，所述通信单元510还用于：
接收所述第一接入点设备发送的第二请求帧，所述第二请求帧用于请求所述接入点设备反馈CSI信息。
在一些实施例中，所述第二请求帧是通过广播、组播或单播方式发送的。
在一些实施例中，所述第二请求帧包括以下信息中的至少一项：
第五指示信息，所述第五指示信息用于指示所述接入点设备反馈第一类CSI和/或第二类CSI；
AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
AP列表，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/或不参与C-BF模式的多AP协作传输的AP；
至少一个参与C-BF的关联STA列表，每个参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述参与C-BF的关联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；
至少一个不参与C-BF的关联STA列表，每个不参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述不参与C-BF的关联STA列表用于指示对应的AP关联的不参与C-BF模式的多AP协作传输的STA。
在一些实施例中，所述第二请求帧包括CSI请求字段，所述CSI请求字段包括以下指示一个字段：
CSI请求命令字段，用于指示请求所述接入点设备反馈第一类CSI和/或第二类CSI；
AP数量字段，用于指示所述第二请求帧中包括的AP的数量；
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；
至少一个参与C-BF的关联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；
至少一个不参与C-BF的关联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。
在一些实施例中，所述通信单元510还用于：
向所述第一接入点设备发送第二响应帧，所述第二响应帧包括所述接入点设备反馈的CSI信息。
在一些实施例中，所述第二响应帧包括所述接入点设备获得的第二类CSI。
在一些实施例中，所述第二响应帧包括所述接入点设备获得的第一类CSI和第二类CSI。
在一些实施例中，所述第二响应帧包括CSI信息字段，所述CSI信息字段用于指示所述接入点设备获得的第一类CSI和/或所述接入点设备获得的第二类CSI。
在一些实施例中，所述通信单元510还用于：
接收所述第一接入点设备发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述每个第一类AP对应的转向矩阵是通过有线连接或无线连接发送的。
在一些实施例中，所述通信单元510还用于：
接收第一通知帧，所述第一通知帧包括每个第一类AP对应的转向矩阵。
在一些实施例中，所述第一通知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每个第一类AP对应的转向矩阵。
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；
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；
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；
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；
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，用于指示所述第一通知帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
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，所述第一通知帧还用于触发参与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：
接收主接入点设备发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述每个第一类AP对应的转向矩阵是通过有线连接或无线连接发送的。
在一些实施例中，所述通信单元510还用于：
接收所述主接入点设备发送的第二通知帧，所述第二通知帧包括每个第一类AP对应的转向矩阵。
在一些实施例中，所述第二通知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每个第一类AP对应的转向矩阵。
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；
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；
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；
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；
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，用于指示所述第二通知帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
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，所述第二通知帧还用于触发参与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。
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接入点设备500可对应于本申请方法实施例中的第二AP或Shared AP，并且第二接入点设备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36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39是根据本申请实施例的主接入点设备800的示意性框图。图39的主接入点设备800包括：
处理单元810，用于获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI；
其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
在一些实施例中，所述目标CSI包括第一类CSI和/或第二类CSI，其中，所述第一类CSI包括 所述第一类AP和所述第一类AP关联的第一类STA之间的CSI，所述第二类CSI包括所述第一类AP和所述第一类AP的重叠基本服务集OBSS中的第一类STA之间的CSI。
在一些实施例中，所述目标CSI是所述主接入点设备从第一接入点设备获取的，或者，所述目标CSI是所述主接入点设备根据候选CSI和目标信息确定的；
其中，所述第一接入点设备为共享AP，所述候选CSI包括所述共享AP从至少一个被共享AP获得的CSI和/或所述共享AP获得的CSI，所述目标信息用于指示所述多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，所述目标CSI是所述主接入点设备通过有线连接或无线连接从所述第一接入点设备获取的；或者
所述候选CSI和所述目标信息是所述主接入点设备通过有线连接或无线连接从所述第一接入点设备获取的。
在一些实施例中，所述处理单元810还用于：
根据所述目标信息，剔除所述候选CSI中的如下CSI，得到所述目标CSI:
所述第一类AP和所述第一类AP关联的第二类STA之间的CSI；
所述第一类AP和第二类AP关联的STA之间的CSI；
其中，所述第二类STA为不参与C-BF模式的多AP协作传输的STA，所述第二类AP为所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP。
在一些实施例中，所述主接入点设备800还包括：
通信单元，用于接收共享AP发送的第三请求帧，所述第三请求帧用于请求所述主接入点设备根据所述目标CSI计算转向矩阵，其中，所述第三请求帧包括所述目标CSI或所述第三请求帧包括所述候选CSI和所述目标信息。
在一些实施例中，所述第三请求帧包括协作转向矩阵请求字段，所述协作转向矩阵请求字段包括以下至少一个字段：
AP信息数量字段，用于指示所述第三请求帧携带的AP信息的数量；
至少一个AP信息字段，用于指示参与C-BF模式的多AP协作传输的AP信息。
在一些实施例中，所述AP信息字段包括以下至少一个字段：
AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP；
参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的参与C-BF模式的多AP协作传输的STA；
不参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的不参与C-BF模式的多AP协作传输的STA；
CSI信息字段，用于指示所述AP ID字段指示的AP获得的第一类CSI和/或第二类CSI。9、根据权利要求1-8中任一项所述的方法，其特征在于，所述方法还包括：
所述主接入点设备根据所述目标CSI，计算所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述主接入点设备800还包括：通信单元，用于向所述第一接入点设备发送所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述每个第一类AP对应的转向矩阵通过有线连接或无线连接发送。
在一些实施例中，所述主接入点设备800还包括：
通信单元，用于向所述第一接入点设备发送第三响应帧，所述第三响应帧包括所述多AP协作集合中的每个第一类AP对应的转向矩阵。
在一些实施例中，所述第三响应帧包括协作转向矩阵响应字段，所述协作转向矩阵响应字段包括以下至少一个字段：
转向矩阵数量字段，用于指示所述第三响应帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
在一些实施例中，所述主接入点设备800还包括：
通信单元，用于向所述多AP协作集合中的每个第一类AP发送的每个第一类AP对应的转向矩阵。
在一些实施例中，所述主接入点设备800还包括：
通信单元，用于发送第二通知帧，所述第二通知帧包括所述每个第一类AP对应的转向矩阵。
在一些实施例中，所述第二通知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每个第一类AP对应的转向矩阵。
在一些实施例中，所述第二通知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每个第一类AP对应的转向矩阵。
在一些实施例中，所述第二通知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每个第一类AP对应的转向矩阵。
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；
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；
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；
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；
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，用于指示所述第二通知帧携带的AP的转向矩阵的数量；
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；
至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
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，所述第二通知帧还用于触发参与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。
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主接入点设备800可对应于本申请方法实施例中的主AP，并且主接入点设备800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36所示方法200中主AP的相应流程，为了简洁，在此不再赘述。
图40是本申请实施例提供的一种通信设备600示意性结构图。图40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。
可选地，该通信设备600具体可为本申请实施例的主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主AP实现的相应流程，为了简洁，在此不再赘述。
图41是本申请实施例的芯片的示意性结构图。图41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41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。
可选地，该芯片可应用于本申请实施例中的主AP，并且该芯片可以实现本申请实施例的各个方法中由主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42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42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。
可选地，该通信系统900还可以包括主AP，用于实现上述方法中主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。
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主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主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。
可选地，该计算机程序产品可应用于本申请实施例中的主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主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。
可选地，该计算机程序可应用于本申请实施例中的主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主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 (112)

  1. 一种无线通信的方法，其特征在于，包括：
    第一接入点AP获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
  2. 根据权利要求1所述的方法，其特征在于，所述目标CSI包括第一类CSI和/或第二类CSI，其中，所述第一类CSI包括所述第一类AP和所述第一类AP关联的第一类STA之间的CSI，所述第二类CSI包括所述第一类AP和所述第一类AP的重叠基本服务集OBSS中的第一类STA之间的CSI。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一AP为共享AP，所述目标CSI根据所述共享AP从至少一个被共享AP获取的CSI和/或所述共享AP通过信道探测获取的CSI确定。
  4. 根据权利要求3所述的方法，其特征在于，所述共享AP从至少一个被共享AP获取的CSI是所述共享AP通过有线连接从至少一个被共享AP获取的；或者
    所述共享AP从至少一个被共享AP获取的CSI是所述共享AP通过无线连接从至少一个被共享AP获取的。
  5. 根据权利要求1-4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向所述多AP协作集合中的至少一个第二AP发送第一请求帧，所述第一请求帧用于请求所述至少一个第二AP参与C-BF模式的多AP协作传输。
  6. 根据权利要求5所述的方法，其特征在于，所述第一请求帧是通过广播、组播或单播方式发送的。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一请求帧包括以下信息中的至少一个：
    第一指示信息，用于指示请求使用的协作传输模式；
    第二指示信息，用于指示是否反馈所述第二AP获得的第一类CSI；
    第三指示信息，用于指示是否反馈所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  8. 根据权利要求5-7中任一项所述的方法，其特征在于，所述第一请求帧包括协作传输请求字段，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协作传输所使用的命令；
    协作正交频分多址接入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；
    协作空间复用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；
    联合传输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；
    协作上行多用户多输入多输出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。
  9. 根据权利要求8所述的方法，其特征在于，所述C-BF命令字段包括如下至少一个字段：
    上报关联STA的CSI字段，用于指示是否反馈所述第二AP获得的第一类CSI；
    上报OBSS STA的CSI字段，用于指示是否反馈所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  10. 根据权利要求8或9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，用于指示所述第一AP是否请求使用C-OFDMA模式的多AP协作传输；
    使用C-SR字段，用于指示所述第一AP是否请求使用C-SR模式的多AP协作传输；
    使用J-TX字段，用于指示所述第一AP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，用于指示所述第一AP是否请求使用C-UL MU MIMO模式的多AP协作传输。
  11. 根据权利要求5-10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二AP发送的第一响应帧，所述第一响应帧用于指示所述第二AP是否接受参与C-BF模式的多AP协作传输。
  12. 根据权利要求11所述的方法，其特征在于，所述第一响应帧是所述至少一个第二AP同步 或异步发送的。
  13. 根据权利要求11或12所述的方法，其特征在于，所述第一响应帧包括以下信息中的至少一个：
    第四指示信息，用于指示所述第二AP是否接受请求使用的协作传输模式；
    参与C-BF的关联STA列表，包括所述第二AP关联的参与C-BF模式的多AP协作传输的STA；
    不参与C-BF的关联STA列表，包括所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
    至少一个CSI，包括所述第二AP获得的第一类CSI和/或所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  14. 根据权利要求11-13中任一项所述的方法，其特征在于，所述第一响应帧包括协作传输响应字段，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。
  15. 根据权利要求14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：
    参与C-BF的关联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；
    不参与C-BF的关联STA列表字段，用于指示所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
    CSI信息字段，用于指示所述第二AP获得的第一类CSI和/或所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  16. 根据权利要求14或15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，用于指示所述第二AP是否接受C-BF模式的协作传输；
    接受C-OFDMA字段，用于指示所述第二AP是否接受C-OFDMA模式的协作传输；
    接受C-SR字段，用于指示所述第二AP是否接受C-SR模式的协作传输；
    接受J-TX字段，用于指示所述第二AP是否接受J-TX模式的协作传输；
    接受C-UL MU MIMO字段，用于指示所述第二AP是否接受C-UL MU MIMO模式的协作传输。
  17. 根据权利要求11-16中任一项所述的方法，其特征在于，所述方法还包括：
    若所述第一响应帧包括所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI，所述第一AP根据所述多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AP关联的STA对于C-BF模式的多AP协作传输的参与情况，剔除所述第二AP和非关联的OBSS STA之间的CSI中的如下CSI，得到所述目标CSI：
    所述第二AP和不参与C-BF模式的多AP协作传输的AP关联的STA之间的CSI。
  18. 根据权利要求1-17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向所述多AP协作集合中的至少一个第三AP发送第二请求帧，所述第二请求帧用于请求所述第三AP反馈CSI信息。
  19. 根据权利要求18所述的方法，其特征在于，所述第二请求帧是通过广播、组播或单播方式发送的。
  20. 根据权利要求19所述的方法，其特征在于，所述第二请求帧包括以下信息中的至少一项：
    第五指示信息，所述第五指示信息用于指示所述第三AP反馈第一类CSI和/或第二类CSI；
    AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
    AP列表，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/或不参与C-BF模式的多AP协作传输的AP；
    至少一个参与C-BF的关联STA列表，每个参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述参与C-BF的关联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；
    至少一个不参与C-BF的关联STA列表，每个不参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述不参与C-BF的关联STA列表用于指示对应的AP关联的不参与 C-BF模式的多AP协作传输的STA。
  21. 根据权利要求18-20中任一项所述的方法，其特征在于，所述第二请求帧包括CSI请求字段，所述CSI请求字段包括以下指示一个字段：
    CSI请求命令字段，用于指示请求所述第三AP反馈第一类CSI和/或第二类CSI；
    AP数量字段，用于指示所述第二请求帧中包括的AP的数量；
    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；
    至少一个参与C-BF的关联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；
    至少一个不参与C-BF的关联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。
  22. 根据权利要求18-21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发送的第二响应帧，所述第二响应帧包括所述第三AP反馈的CSI信息。
  23. 根据权利要求22所述的方法，其特征在于，所述第二响应帧是所述至少一个第三AP同步或异步发送的。
  24. 根据权利要求22所述的方法，其特征在于，所述第二响应帧包括所述第三AP获得的第一类CSI和/或所述第三AP获得的第二类CSI。
  25. 根据权利要求24所述的方法，其特征在于，所述第二响应帧包括CSI信息字段，所述CSI信息字段用于指示所述第三AP获得的第一类CSI和/或所述第三AP获得的第二类CSI。
  26. 根据权利要求1-25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根据所述目标CSI，计算所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  27. 根据权利要求1-25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向主AP发送所述目标CSI。
  28. 根据权利要求27所述的方法，其特征在于，所述第一AP通过有线连接或无线连接向所述主AP发送所述目标CSI。
  29. 根据权利要求27或28所述的方法，其特征在于，所述第一AP向主AP发送所述目标CSI，包括：
    所述第一AP向所述主AP发送第三请求帧，所述第三请求帧包括所述目标CSI，所述第三请求帧用于请求所述主AP根据所述目标CSI计算转向矩阵。
  30. 根据权利要求29所述的方法，其特征在于，所述第三请求帧包括协作转向矩阵请求字段，所述协作转向矩阵请求字段包括以下至少一个字段：
    AP信息数量字段，用于指示所述第三请求帧携带的AP信息的数量；
    至少一个AP信息字段，用于指示参与C-BF模式的多AP协作传输的AP信息。
  31. 根据权利要求30所述的方法，其特征在于，所述AP信息字段包括以下至少一个字段：
    AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP；
    参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的参与C-BF模式的多AP协作传输的STA；
    不参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的不参与C-BF模式的多AP协作传输的STA；
    CSI信息字段，用于指示所述AP ID字段指示的AP获得的第一类CSI和/或第二类CSI。
  32. 根据权利要求27-31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接收所述主AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  33. 根据权利要求32所述的方法，其特征在于，所述第一AP通过有线连接或无线连接接收所述主AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  34. 根据权利要求32或33所述的方法，其特征在于，所述第一AP接收所述主AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵，包括：
    所述第一AP接收所述主AP发送的第三响应帧，所述第三响应帧包括所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  35. 根据权利要求34所述的方法，其特征在于，所述第三响应帧包括协作转向矩阵响应字段， 所述协作转向矩阵响应字段包括以下至少一个字段：
    转向矩阵数量字段，用于指示所述第三响应帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  36. 根据权利要求26-35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向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵。
  37. 根据权利要求36所述的方法，其特征在于，所述第一AP通过有线连接或无线连接向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵。
  38. 根据权利要求36或37所述的方法，其特征在于，所述第一AP向所述多AP协作集合中的每个第一类AP发送所述每个第一类AP对应的转向矩阵，包括：
    所述第一AP发送第一通知帧，所述第一通知帧包括每个第一类AP对应的转向矩阵。
  39. 根据权利要求38所述的方法，其特征在于，所述第一通知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每个第一类AP对应的转向矩阵。
  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；
    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；
    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；
    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；
    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，用于指示所述第一通知帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  42. 根据权利要求40或41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。
  43. 根据权利要求38-42中任一项所述的方法，其特征在于，所述第一通知帧还用于参与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。
  44. 一种无线通信的方法，其特征在于，包括：
    第二接入点AP向第一AP发送所述第二AP获得的第一类信道状态信息CSI和/或第二类CSI，其中，所述第二AP为多AP协作集合中的第一类AP，所述第二AP获得的第一类CSI包括所述第二AP和所述第二AP关联的第一类站点STA之间的CSI，所述第二AP获得的第二类CSI包括所述第二AP和所述第二AP的重叠基本服务集OBSS中的第一类STA之间的CSI，所述第一类AP为参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与C-BF模式的多AP协作传输的STA。
  45. 根据权利要求44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。
  46. 根据权利要求44或45所述的方法，其特征在于，所述第二AP获得的第一类CSI和/或第二类CSI是所述第二AP通过有线连接发送给共享AP的。
  47. 根据权利要求44或45所述的方法，其特征在于，所述第二AP获得的第一类CSI和/或第二类CSI是所述第二AP通过无线链路发送给共享AP的。
  48. 根据权利要求44-47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发送第一请求帧，所述第一请求帧用于请求所述第二AP参与C-BF模式的多AP协作传输。
  49. 根据权利要求48所述的方法，其特征在于，所述第一请求帧是通过广播、组播或单播方式 发送的。
  50. 根据权利要求48或49所述的方法，其特征在于，所述第一请求帧包括以下信息中的至少一个：
    第一指示信息，用于指示请求使用的协作传输模式；
    第二指示信息，用于指示是否反馈所述第二AP获得的第一类CSI；
    第三指示信息，用于指示是否反馈所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  51. 根据权利要求48-50中任一项所述的方法，其特征在于，所述第一请求帧包括协作传输请求字段，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；
    协作正交频分多址接入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；
    协作空间复用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；
    联合传输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；
    协作上行多用户多输入多输出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。
  52. 根据权利要求51所述的方法，其特征在于，所述C-BF命令字段包括如下至少一个字段：
    上报关联STA的CSI字段，用于指示是否反馈所述第二AP获得的第一类CSI；
    上报OBSS STA的CSI字段，用于指示是否反馈所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  53. 根据权利要求51或52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，用于指示所述第一AP是否请求使用C-OFDMA模式的多AP协作传输；
    使用C-SR字段，用于指示所述第一AP是否请求使用C-SR模式的多AP协作传输；
    使用J-TX字段，用于指示所述第一AP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，用于指示所述第一AP是否请求使用C-UL MU MIMO模式的多AP协作传输。
  54. 根据权利要求48-53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发送的第一响应帧，所述第一响应帧用于指示所述第二AP是否接受参与C-BF模式的多AP协作传输。
  55. 根据权利要求54所述的方法，其特征在于，所述第一响应帧包括以下信息中的至少一个：
    第四指示信息，用于指示所述第二AP是否接受请求使用的协作传输模式；
    参与C-BF的关联STA列表，包括所述第二AP关联的参与C-BF模式的多AP协作传输的STA；
    不参与C-BF的关联STA列表，包括所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
    至少一个CSI，包括所述第二AP获得的第一类CSI和/或所述第二AP获得的所述第二AP和非关联的OBSS STA之间的CSI。
  56. 根据权利要求54或55所述的方法，其特征在于，所述第一响应帧包括协作传输响应字段，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：
    参与C-BF的关联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；
    不参与C-BF的关联STA列表字段，用于指示所述第二AP关联的不参与C-BF模式的多AP协作传输的STA；
    CSI信息字段，用于指示所述第二AP获得的第一类CSI和/或所述第二AP获得的第二类CSI。
  58. 根据权利要求56或57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，用于指示所述第二AP是否接受C-BF模式的协作传输；
    接受C-OFDMA字段，用于指示所述第二AP是否接受C-OFDMA模式的协作传输；
    接受C-SR字段，用于指示所述第二AP是否接受C-SR模式的协作传输；
    接受J-TX字段，用于指示所述第二AP是否接受J-TX模式的协作传输；
    接受C-UL MU MIMO字段，用于指示所述第二AP是否接受C-UL MU MIMO模式的协作传输。
  59. 根据权利要求44-58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发送的第二请求帧，所述第二请求帧用于请求所述第二AP反馈CSI信息。
  60. 根据权利要求59所述的方法，其特征在于，所述第二请求帧是通过广播、组播或单播方式发送的。
  61. 根据权利要求59或60所述的方法，其特征在于，所述第二请求帧包括以下信息中的至少一项：
    第五指示信息，所述第五指示信息用于指示所述第二AP反馈第一类CSI和/或第二类CSI；
    AP数量信息，用于指示所述第二请求帧中包括的AP的数量；
    AP列表，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/或不参与C-BF模式的多AP协作传输的AP；
    至少一个参与C-BF的关联STA列表，每个参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述参与C-BF的关联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；
    至少一个不参与C-BF的关联STA列表，每个不参与C-BF的关联STA列表对应一个参与C-BF模式的多AP协作传输的AP，所述不参与C-BF的关联STA列表用于指示对应的AP关联的不参与C-BF模式的多AP协作传输的STA。
  62. 根据权利要求59-61中任一项所述的方法，其特征在于，所述第二请求帧包括CSI请求字段，所述CSI请求字段包括以下指示一个字段：
    CSI请求命令字段，用于指示请求所述第二AP反馈第一类CSI和/或第二类CSI；
    AP数量字段，用于指示所述第二请求帧中包括的AP的数量；
    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；
    至少一个参与C-BF的关联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；
    至少一个不参与C-BF的关联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。
  63. 根据权利要求59-62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发送第二响应帧，所述第二响应帧包括所述第二AP反馈的CSI信息。
  64. 根据权利要求63所述的方法，其特征在于，所述第二响应帧包括所述第二AP获得的第二类CSI。
  65. 根据权利要求63所述的方法，其特征在于，所述第二响应帧包括所述第二AP获得的第一类CSI和第二类CSI。
  66. 根据权利要求63-65中任一项所述的方法，其特征在于，所述第二响应帧包括CSI信息字段，所述CSI信息字段用于指示所述第二AP获得的第一类CSI和/或所述第二AP获得的第二类CSI。
  67. 根据权利要求44-66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发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  68. 根据权利要求67所述的方法，其特征在于，所述每个第一类AP对应的转向矩阵是通过有线连接或无线连接发送的。
  69. 根据权利要求67或68所述的方法，其特征在于，所述第二AP接收所述第一AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵，包括：
    所述第二AP接收第一通知帧，所述第一通知帧包括每个第一类AP对应的转向矩阵。
  70. 根据权利要求69所述的方法，其特征在于，所述第一通知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每个第一类AP对应的转向矩阵。
  71. 根据权利要求70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；
    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；
    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；
    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；
    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。
  72. 根据权利要求71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，用于指示所述第一通知帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  73. 根据权利要求71或72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。
  74. 根据权利要求69-73中任一项所述的方法，其特征在于，所述第一通知帧还用于触发参与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。
  75. 根据权利要求44-66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接收主AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  76. 根据权利要求75所述的方法，其特征在于，所述每个第一类AP对应的转向矩阵是通过有线连接或无线连接发送的。
  77. 根据权利要求75或76所述的方法，其特征在于，所述第二AP接收所述第一AP发送的所述多AP协作集合中的每个第一类AP对应的转向矩阵，包括：
    所述第二AP接收所述主AP发送的第二通知帧，所述第二通知帧包括每个第一类AP对应的转向矩阵。
  78. 根据权利要求77所述的方法，其特征在于，所述第二通知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每个第一类AP对应的转向矩阵。
  79. 根据权利要求78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；
    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；
    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；
    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；
    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。
  80. 根据权利要求79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，用于指示所述第二通知帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  81. 根据权利要求79或80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。
  82. 根据权利要求77-81中任一项所述的方法，其特征在于，所述第二通知帧还用于触发参与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。
  83. 一种无线通信的方法，其特征在于，包括：
    主接入点AP获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI；
    其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
  84. 根据权利要求83所述的方法，其特征在于，所述目标CSI包括第一类CSI和/或第二类CSI，其中，所述第一类CSI包括所述第一类AP和所述第一类AP关联的第一类STA之间的CSI，所述第二类CSI包括所述第一类AP和所述第一类AP的重叠基本服务集OBSS中的第一类STA之间的CSI。
  85. 根据权利要求84所述的方法，其特征在于，所述目标CSI是所述主AP从第一AP获取的，或者，所述目标CSI是所述主AP根据候选CSI和目标信息确定的；
    其中，所述第一AP为共享AP，所述候选CSI包括所述共享AP从至少一个被共享AP获得的CSI和/或所述共享AP获得的CSI，所述目标信息用于指示所述多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AP关联的STA对于C-BF模式的多AP协作传输的参与情况。
  86. 根据权利要求85所述的方法，其特征在于，所述目标CSI是所述主AP通过有线连接或无线连接从所述第一AP获取的；或者
    所述候选CSI和所述目标信息是所述主AP通过有线连接或无线连接从所述第一AP获取的。
  87. 根据权利要求85或86所述的方法，其特征在于，所述方法还包括：
    所述主AP根据所述目标信息，剔除所述候选CSI中的如下CSI，得到所述目标CSI:
    所述第一类AP和所述第一类AP关联的第二类STA之间的CSI；
    所述第一类AP和第二类AP关联的STA之间的CSI；
    其中，所述第二类STA为不参与C-BF模式的多AP协作传输的STA，所述第二类AP为所述多AP协作集合中不参与C-BF模式的多AP协作传输的AP。
  88. 根据权利要求85-87中任一项所述的方法，其特征在于，所述方法还包括：
    所述主AP接收共享AP发送的第三请求帧，所述第三请求帧用于请求所述主AP根据所述目标CSI计算转向矩阵，其中，所述第三请求帧包括所述目标CSI或所述第三请求帧包括所述候选CSI和所述目标信息。
  89. 根据权利要求88所述的方法，其特征在于，所述第三请求帧包括协作转向矩阵请求字段，所述协作转向矩阵请求字段包括以下至少一个字段：
    AP信息数量字段，用于指示所述第三请求帧携带的AP信息的数量；
    至少一个AP信息字段，用于指示参与C-BF模式的多AP协作传输的AP信息。
  90. 根据权利要求89所述的方法，其特征在于，所述AP信息字段包括以下至少一个字段：
    AP ID字段，用于指示参与C-BF模式的多AP协作传输的AP；
    参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的参与C-BF模式的多AP协作传输的STA；
    不参与C-BF的关联STA列表字段，用于指示所述AP ID字段指示的AP关联的不参与C-BF模式的多AP协作传输的STA；
    CSI信息字段，用于指示所述AP ID字段指示的AP获得的第一类CSI和/或第二类CSI。
  91. 根据权利要求83-90中任一项所述的方法，其特征在于，所述方法还包括：
    所述主AP根据所述目标CSI，计算所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  92. 根据权利要求91所述的方法，其特征在于，所述方法还包括：
    所述主AP向所述第一AP发送所述多AP协作集合中的每个第一类AP对应的转向矩阵。
  93. 根据权利要求92所述的方法，其特征在于，所述每个第一类AP对应的转向矩阵通过有线连接或无线连接发送。
  94. 根据权利要求92或93所述的方法，其特征在于，所述主AP向所述第一AP发送所述多AP协作集合中的每个第一类AP对应的转向矩阵，包括：
    所述主AP向所述第一AP发送第三响应帧，所述第三响应帧包括所述多AP协作集合中的每个 第一类AP对应的转向矩阵。
  95. 根据权利要求94所述的方法，其特征在于，所述第三响应帧包括协作转向矩阵响应字段，所述协作转向矩阵响应字段包括以下至少一个字段：
    转向矩阵数量字段，用于指示所述第三响应帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  96. 根据权利要求91所述的方法，其特征在于，所述方法还包括：
    所述主AP向所述多AP协作集合中的每个第一类AP发送的每个第一类AP对应的转向矩阵。
  97. 根据权利要求96所述的方法，其特征在于，所述主AP向所述多AP协作集合中的每个第一类AP发送的每个第一类AP对应的转向矩阵，包括：
    所述主AP发送第二通知帧，所述第二通知帧包括所述每个第一类AP对应的转向矩阵。
  98. 根据权利要求97所述的方法，其特征在于，所述第二通知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每个第一类AP对应的转向矩阵。
  99. 根据权利要求98所述的方法，其特征在于，所述第二通知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每个第一类AP对应的转向矩阵。
  100. 根据权利要求99所述的方法，其特征在于，所述第二通知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每个第一类AP对应的转向矩阵。
  101. 根据权利要求100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；
    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；
    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；
    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；
    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。
  102. 根据权利要求101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，用于指示所述第二通知帧携带的AP的转向矩阵的数量；
    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；
    至少一个转向矩阵字段，每个转向矩阵字段对应所述至少一个AP ID字段所指示的一个AP，所述转向矩阵字段用于指示对应的AP执行C-BF模式的多AP协作传输所采用的转向矩阵。
  103. 根据权利要求101或102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。
  104. 根据权利要求99-103中任一项所述的方法，其特征在于，所述第二通知帧还用于触发参与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。
  105. 一种接入点设备，其特征在于，包括：
    处理单元，用于获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI，其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
  106. 一种接入点设备，其特征在于，包括：
    通信单元，用于向第一接入点设备发送所述接入点设备获得的第一类信道状态信息CSI和/或第二类CSI，其中，所述第二接入点设备为多AP协作集合中的第一类AP，所述第二接入点设备获得的第一类CSI包括所述第二接入点设备和所述第二接入点设备关联的第一类站点STA之间的CSI，所述第二接入点设备获得的第二类CSI包括所述第二接入点设备和所述第二接入点设备的重叠基本服务集OBSS中的第一类STA之间的CSI，所述第一类AP为参与协作波束赋形C-BF模式的多AP协 作传输的AP，所述第一类STA为参与C-BF模式的多AP协作传输的STA。
  107. 一种主接入点设备，其特征在于，包括：
    处理单元，用于获取目标信道状态信息CSI，所述目标CSI包括第一类AP和第一类站点STA之间的CSI；
    其中，所述第一类AP为多AP协作集合中参与协作波束赋形C-BF模式的多AP协作传输的AP，所述第一类STA为参与所述C-BF模式的多AP协作传输的STA，所述目标CSI用于计算所述多AP协作集合中的每个第一类AP对应的转向矩阵，所述第一类AP对应的转向矩阵用于所述第一类AP执行C-BF模式的多AP协作传输。
  108. 一种接入点设备，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43中任一项所述的方法，或者，如权利要求44至82中任一项所述的方法，或如权利要求83至104中任一项所述的方法。
  109. 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43中任一项所述的方法，或者，如权利要求44至82中任一项所述的方法，或如权利要求83至104中任一项所述的方法。
  110. 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43中任一项所述的方法，或者，如权利要求44至82中任一项所述的方法，或如权利要求83至104中任一项所述的方法。
  111. 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43中任一项所述的方法，或者，如权利要求44至82中任一项所述的方法，或如权利要求83至104中任一项所述的方法。
  112. 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43中任一项所述的方法，或者，如权利要求44至82中任一项所述的方法，或如权利要求83至104中任一项所述的方法。
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US20210044333A1 (en) * 2019-10-25 2021-02-11 Feng Jiang Ndpa for multi-ap coordinated beamforming (cbf) and multi-ap joint transmission (jt) in eht
CN113541750A (zh) * 2020-04-17 2021-10-22 华为技术有限公司 协作波束赋形方法、通信装置及通信系统
CN113728726A (zh) * 2019-04-25 2021-11-30 佳能株式会社 通信装置、无线通信系统和接入点控制方法
CN113747485A (zh) * 2020-05-30 2021-12-03 华为技术有限公司 多ap协作传输的信道探测方法及相关装置

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CN113728726A (zh) * 2019-04-25 2021-11-30 佳能株式会社 通信装置、无线通信系统和接入点控制方法
US20210044333A1 (en) * 2019-10-25 2021-02-11 Feng Jiang Ndpa for multi-ap coordinated beamforming (cbf) and multi-ap joint transmission (jt) in eht
CN113541750A (zh) * 2020-04-17 2021-10-22 华为技术有限公司 协作波束赋形方法、通信装置及通信系统
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