Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device receives a first frame sent by a second device, the first frame being used for triggering the first device to execute channel detection used for spatial multiplexing; and / or in response to the first frame, the first device executes a first operation, the first operation comprising sending a detection signal used for the channel detection, or performing channel measurement on the basis of a received detection signal for the channel detection. In embodiments of the present application, by means of introducing channel detection technology for spatial multiplexing, and on the basis of a channel detection result, it can be determined which scheduled devices and / or peer devices corresponding to scheduled devices can participate in spatial multiplexing transmission, so that the communication quality of spatial multiplexing is improved.

Description

Wireless communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more particularly, to a method and device for wireless communication. Background Art

[0002] Currently, spatial multiplexing methods provide random opportunities for stations to obtain spatial multiplexing-based transmissions. Typically, a station (STA) in a basic service set (BSS) needs to monitor or receive the physical layer protocol data unit (PPDU) sent by another station in an overlapping basic service set (OBSS) to determine in real time whether spatial multiplexing transmission can be initiated, which may affect the communication quality of spatial multiplexing.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method and a communication device. The following introduces various aspects of the present application.

[0005] In a first aspect, a communication method is provided, including: a first device receives a first frame sent by a second device, the first frame being used to trigger the first device to perform channel detection for spatial multiplexing; and / or in response to the first frame, the first device performs a first operation, the first operation including sending a detection signal for the channel detection, or performing channel measurement based on the received detection signal for the channel detection.

[0006] In a second aspect, a communication method is provided, including: a second device sending a first frame to a first device, where the first frame is used to trigger the first device to perform channel detection for spatial multiplexing.

[0007] According to a third aspect, a communication device is provided, which is a first device and includes: a receiving unit for receiving a first frame sent by a second device, the first frame being used to trigger the first device to perform channel detection for spatial multiplexing; and / or a processing unit for performing a first operation in response to the first frame, the first operation including sending a detection signal for the channel detection, or performing channel measurement based on the received detection signal for the channel detection.

[0008] In a fourth aspect, a communication device is provided, which is a second device and includes: a sending unit, configured to send a first frame to a first device, wherein the first frame is configured to trigger the first device to perform channel detection for spatial multiplexing.

[0009] In a fifth aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the communication device executes part or all of the steps in the methods of the above aspects.

[0010] In a sixth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned communication device. In another possible design, the system may also include other devices that interact with the communication device in the solution provided in the embodiment of the present application.

[0011] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device to execute part or all of the steps in the methods of the above aspects.

[0012] In an eighth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0013] In a ninth aspect, an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] In an embodiment of the present application, by introducing channel detection technology for spatial multiplexing, and based on the detection results of the channel detection, it can be determined which scheduled devices and / or the corresponding opposite devices of the scheduled devices can participate in spatial multiplexing transmission, so as to improve the communication quality of spatial multiplexing transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0016] FIG2 is a schematic diagram of a non-trigger-based detection process.

[0017] FIG3 is a schematic diagram of a detection process based on triggering.

[0018] FIG4 is a schematic diagram of a spatial multiplexing process based on parameterized spatial multiplexing.

[0019] FIG5 is a schematic diagram of a coordinated spatial multiplexing transmission scenario.

[0020] FIG6 is a schematic diagram of another scenario of coordinated spatial multiplexing transmission.

[0021] FIG7 is a schematic diagram of PSR-based spatial multiplexing.

[0022] FIG8 is a schematic diagram of a wireless communication scenario to which an embodiment of the present application is applicable.

[0023] FIG9 is a schematic diagram of a wireless communication method according to an embodiment of the present application.

[0024] FIG10 is a schematic diagram of the format of the user information field corresponding to the transmitting end of the detection signal in an embodiment of the present application.

[0025] FIG11 is a schematic diagram of the format of the user information field corresponding to the receiving end of the detection signal in an embodiment of the present application.

[0026] FIG12 is a schematic diagram of the format of the SR report control field in an embodiment of the present application.

[0027] FIG13 is a schematic diagram of the format of the SR report field in an embodiment of the present application.

[0028] FIG14 is a schematic diagram of the format of the user information field in the SRRP according to an embodiment of the present application.

[0029] FIG15 and FIG16 introduce the format of the spatial multiplexing detection polling trigger frame of an embodiment of the present application.

[0030] 17 to 19 are schematic flow charts of wireless communication methods according to embodiments of the present application.

[0031] Figure 20 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0032] Figure 21 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0033] FIG22 is a schematic structural diagram of the device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solution in this application will be described below with reference to the accompanying drawings.

[0035] Communication System

[0036] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless local area networks (WLAN), wireless fidelity (WiFi), high performance radio local area networks (HIPELAN), wide area networks (WAN), cellular networks, or other communication systems. For another example, the technical solutions provided in the embodiments of the present application can be applied to communication systems that adopt the 802.11 standard. For example, the 802.11 standard includes but is not limited to the 802.11ax standard, the 802.11be standard, and the next generation 802.11 standard.

[0037] FIG1 is a schematic diagram of a communication system applicable to embodiments of the present application. Referring to FIG1 , the communication devices in the communication system 100 may include access points (APs) 111 and 112, and stations (STAs) 121 and 122. STA 121 may access the network through AP 111, and STA 122 may access the network through AP 112.

[0038] In some implementations, a STA may establish an association with one or more APs, after which the associated STAs and APs may communicate. For example, as shown in FIG1 , AP 111 and STA 121 may communicate after establishing an association, and AP 112 and STA 122 may communicate after establishing an association.

[0039] In some implementations, the communication in the communication system 100 may be communication between an AP and a non-AP STA, communication between a non-AP STA and a non-AP STA, or communication between a STA and a peer STA, where a peer STA may refer to a device that communicates with the STA peer, for example, the peer STA may be an AP or a non-AP STA.

[0040] It should be understood that FIG1 exemplarily shows two AP STAs and two non-AP STAs, and the communication system 100 may also include a larger number of AP STAs, or the communication system 100 may include other numbers of non-AP STAs, which is not limited in the embodiments of the present application.

[0041] In addition, the above communication system can be applied to scenarios of multi-device collaboration, such as multi-AP (multiple access points, Multi-AP) collaboration, or multi-site collaboration.

[0042] In the embodiments of this application, the names of AP and / or STA are not limited. In some scenarios, AP can also be called AP STA, that is, in a sense, AP is also a type of STA. In other scenarios, STA can also be called non-AP STA.

[0043] In some scenarios, the aforementioned communication device may also be a "multi-link device (MLD)", i.e., a device that can communicate via multiple communication links, where the multiple communication links may include communication links in different frequency bands, for example, millimeter wave bands and / or low frequency bands. Typically, if the multi-link device is an AP MLD, one of the APs may also be referred to as a "multi-link device-affiliated AP". If the multi-link device is a STA MLD, one of the STAs may also be referred to as a "multi-link device-affiliated STA".

[0044] In the embodiments of the present application, an AP may be a device in a wireless network. An AP may be a communication entity such as a communication server, a router, a switch, or a bridge, or the AP device may include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP may also be a chip, circuit, or processing system in these various forms of devices, thereby realizing the methods and functions of the embodiments of the present application. The AP device can be applied to a variety of scenarios, such as sensor nodes in smart cities (e.g., smart water meters, smart electricity meters, smart air detection nodes), smart devices in smart homes (e.g., smart cameras, projectors, displays, televisions, speakers, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (e.g., wearable devices such as AR and VR), smart devices in smart offices (e.g., printers, projectors, etc.), Internet of Vehicles devices in the Internet of Vehicles, and some infrastructure in daily life scenarios (e.g., vending machines, self-service navigation counters in supermarkets, self-service checkout devices, self-service ordering machines), etc.

[0045] In some implementations, the role of a STA in a communication system is not absolute; in some scenarios, a STA can function as an AP. For example, when a mobile phone is connected to a router, it can be a non-AP STA, while when it is acting as a hotspot for other phones, it functions as an AP.

[0046] In the embodiments of the present application, a STA device in the embodiments of the present application may be a device with wireless transceiver capabilities, such as a device that supports the 802.11 series of protocols and can communicate with an AP or other STAs. For example, a STA is any user communication device that allows a user to communicate with an AP and, in turn, with a WLAN. Examples of STA devices include user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.

[0047] The STA in the embodiment of the present application may also be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. Examples include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or future-evolved public land mobile communication networks. The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0048] By way of example and not limitation, in the embodiments of this application, the STA device may also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for wearable devices that utilize wearable technology to intelligently design and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes. Examples include smart watches or smart glasses, as well as devices that focus on a specific application function and require integration with other devices, such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0049] In addition, in embodiments of the present application, the STA device can also be a terminal device in the Internet of Things (IoT) system. The IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things. In embodiments of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrowband (NB) technology.

[0050] Furthermore, in the embodiments of the present application, the STA device may be a device in a connected vehicle system. The communication methods in a connected vehicle system are collectively referred to as V2X (where X represents everything). For example, V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.

[0051] In addition, in an embodiment of the present application, the STA device may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (partial terminal devices), receiving control information and downlink data from AP devices, and sending electromagnetic waves to transmit data to AP devices.

[0052] In addition, the AP device in the embodiment of the present application may be a device for communicating with a STA device. The AP device may be a network device in a wireless local area network. The AP device may be used to communicate with the STA device through the wireless local area network.

[0053] From the perspective of the communication standards supported by the AP, in some implementations, the AP can be a device that supports the 802.11be standard. The AP can also be a device that supports various current and future 802.11 family WLAN standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0054] From the perspective of STA-supported communication standards, in some implementations, non-AP STAs can support the 802.11be standard. Non-AP STAs can also support various current and future 802.11 family wireless local area network (WLAN) standards, including 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0055] In the embodiments of the present application, there is no limitation on the frequency bands supported by WLAN technology. In some implementations, the frequency bands supported by WLAN technology may include, but are not limited to, low frequency bands (e.g., 2.4 GHz, 5 GHz, 6 GHz) and high frequency bands (e.g., 45 GHz, 60 GHz).

[0056] It should be understood that the specific forms of STA devices and AP devices in the embodiments of the present application are not particularly limited and are merely illustrative.

[0057] Sounding

[0058] Communication technologies such as transmit beamforming and MIMO (e.g., downlink multi-user multiple-input multiple-output (DL MU-MIMO)) require information about the channel state to calculate the steering matrix applied to the transmitted signal to optimize reception at one or more receivers. Some communication devices (e.g., EHT STAs) use sounding protocols to determine this channel state information. The following describes the EHT sounding protocol as an example.

[0059] The EHT sounding protocol provides an explicit feedback mechanism. The mechanism can include two sounding sequences. The two sounding sequences are the EHT non-trigger-based sounding sequence (EHT non-TB sounding sequence) and the EHT trigger-based sounding sequence (EHT TB sounding sequence). In these two sounding sequences, the EHT beamformer uses the training signal sent by the EHT beamformer to measure the channel. The training signal may include an EHT sounding null data physical layer protocol data unit (NDP). Furthermore, the EHT beamformee can feed back a transition estimate of the channel state. The EHT beamformer can use this estimate to determine the steering matrix.

[0060] Feedback from the EHT beamformee may be carried in an EHT compressed beamforming / channel quality indicator (CQI) report in one or more EHT compressed beamforming / CQI frames.

[0061] EHT Compressed Beamforming / CQI reports can include the following three types: single-user feedback (SU feedback), multi-user feedback (MU feedback), and CQI feedback (CQI feedback). Different types of EHT Compressed Beamforming / CQI reports contain different fields. They are described below.

[0062] In single-user feedback, the EHT compressed beamforming / CQI report may include an EHT compressed beamforming / CQI report field.

[0063] In multi-user feedback, the compressed beamforming / CQI report may include a compressed beamforming / CQI report field and an EHT multi-user exclusive beamforming report (EHT MU exclusive beamforming report) field.

[0064] In CQI feedback: Compressed beamforming / CQI report may include an EHT CQI report (EHT CQI Report) field.

[0065] The following describes a non-trigger-based detection sequence and a trigger-based detection sequence.

[0066] Non-trigger-based detection sequences

[0067] FIG2 is a schematic diagram of a non-trigger-based detection process. The process shown in FIG2 can be performed by an EHT beamformer and an EHT beamformee. The process shown in FIG2 can include steps S210 to S230.

[0068] In step S210, the EHT beamformer sends an EHT NDPA frame. It should be noted that the NDPA frame may also be referred to as an NDP announcement frame.

[0069] The NDPA frame is an individually addressed NDPA frame.

[0070] The EHT NDPA frame contains only a station information field (STA info field). As can be seen, the EHT beamformer can initiate a non-trigger-based sounding sequence with the EHT beamformee to request single user (SU) or CQI feedback.

[0071] Based on step S210 , the EHT beamformer may initiate an EHT non-trigger-based detection sequence.

[0072] In step S220 , the EHT beamformer sends an EHT sounding NDP frame at a short interframe space (SIFS) after the EHT NDPA frame.

[0073] Step S230: SIFS after the EHT sounding NDP frame, the EHT beamformee responds to the EHT compressed beamforming / CQI frame.

[0074] Trigger-based detection sequence

[0075] Figure 3 is a schematic diagram of a trigger-based detection process. The process shown in Figure 3 can be performed by an EHT beamformer and n (n≥1) EHT beamformees. The process shown in Figure 3 can include steps S310 to S340.

[0076] Step S310, the EHT beamformer transmits an EHT NDPA frame.

[0077] Based on Step S310, the EHT beamformer can initiate an EHT trigger-based sounding sequence.

[0078] The EHT NDPA frame in Step S310 may include one or more station information fields.

[0079] Step S320, after a SIFS following the EHT NDPA frame, the EHT beamformer transmits an EHT sounding NDP frame.

[0080] Step S330, after a SIFS following the EHT sounding NDP frame, the EHT beamformer transmits a beamforming report poll (BFRP) trigger frame.

[0081] The number of stations that the BFRP trigger frame in Step S330 can trigger may be limited. Figure 3 takes the case where the BFRP trigger frame in Step S330 triggers k stations to give feedback. Here, k is a positive integer less than or equal to n.

[0082] Step S340, in response to the BFRP trigger frame, EHT beamformee 1 to EHT beamformee k simultaneously give feedback on EHT compressed beamforming / CQI frames.

[0083] It should be noted that each beamformee triggered by the BFRP trigger frame can respond to an EHT TB physical layer protocol data unit (PPDU) after the SIFS of the BFPR trigger frame, and the PPDU may contain one or more EHT compressed beamforming / CQI frames.

[0084] When k < n, there may be subsequent BFRP trigger frames in the EHT TB sounding sequence. That is, the process shown in Figure 3 may further include Steps S350 and S360.

[0085] Step S350, the EHT beamformer transmits a subsequent BFRP trigger frame.

[0086] Step S360, in response to the BFRP trigger frame in Step S350, EHT beamformee k + 1 to EHT beamformee n simultaneously give feedback on EHT compressed beamforming / CQI frames.

[0087] It should be noted that if there is a subsequent BFRP triggering frame (such as the BFRP triggering frame in step S350) in the EHT TB detection sequence, the beamformer should send the subsequent BFRP triggering frame SIFS after sending the EHT TB PPDU in response to the previous BFRP triggering frame.

[0088] It should be noted that using EHT triggered-based detection does not necessarily mean multi-user feedback. EHT triggered-based detection can also be used to obtain single-user feedback or CQI feedback.

[0089] It should be noted that the above description uses the EHT detection process as an example, but the present application can be applied not only to the EHT detection process, but also to other detection processes (such as very high throughput (VHT), high efficiency (HE), ultra high reliability (UHR), etc.). Since the principles of the detection process are similar, they will not be repeated here.

[0090] Coordinated spatial reuse (CSR)

[0091] For multi-AP coordinated operation scenarios, CSR is proposed. CSR enables TXOP sharing among multiple APs participating in multi-AP coordinated operation. The following describes TXOP sharing using CSR, using Figure 4.

[0092] As shown in Figure 4, by using coordinated spatial multiplexing to share a TXOP, AP1 and AP2 can simultaneously communicate with their associated stations within the channel bandwidth and duration corresponding to the shared TXOP. As can be seen in Figure 2, the time and frequency domain resources occupied by AP1 and AP2 for communication with their associated stations overlap.

[0093] Before CSR transmission is performed between multiple APs, the APs participating in the CSR need to negotiate to establish the CSR. The CSR setup process is performed by exchanging request / response frames. The CSR setup process can negotiate the parameters involved in the CSR. Taking two APs (AP1 and AP2) as an example, one AP can send a CSR trigger frame to the other AP, thereby initiating CSR transmission within its TXOP. Among them, the AP that sends the CSR trigger frame can be called a sharing AP, and the AP that receives the CSR trigger frame can be called a shared AP. If a multi-AP coordinated transmission (including CSR) protocol has been established between the two APs, then during the shared TXOP duration, AP1 and AP2 can communicate with their associated stations at the same time.

[0094] During CSR transmission, participating APs need to know the path loss between the scheduled STA and the interfering AP. For shared APs, the interfering AP's power can be controlled based on the path loss between the scheduled STA and the interfering AP, thereby reducing interference from the interfering AP to the scheduled STA. Figure 5 illustrates a CSR transmission scenario. As shown in Figure 5, AP1 schedules STA1, which is associated with AP1. During CSR transmission, AP1 needs to know the path loss between AP2 (the interfering AP) and STA1.

[0095] In addition, path loss measurement can be performed before CSR transmission. For the scenario shown in Figure 6, AP1 needs to know the path loss between AP2 (interfering AP) and STA1. If AP1 is a shared AP, AP1 can use path loss to control the power of AP2. At the same time, AP1 can use path loss to estimate the signal to interference plus noise ratio (SINR) at STA1. Path loss measurement can be implemented based on the beacon request / response and null data packet (NDP) measurement mechanisms in related technologies.

[0096] Spatial reuse based on parameterized spatial reuse (PSR) and spatial reuse based on overlapping basic service sets (OBSS) packet detection (PD)

[0097] To enable early identification of OBSS signals and interference management, related technologies (such as the IEEE 802.11ax specification) propose corresponding spatial multiplexing operations (or spatial reuse operations), which can allow more frequent reuse of the medium between OBSSs in dense deployment scenarios.

[0098] Related technologies define two independent spatial multiplexing modes: OBSS PD-based spatial multiplexing and PSR-based spatial multiplexing. These modes are described below.

[0099] There are two types of OBSS PD-based spatial multiplexing: the first type is implemented based on the non-SRG OBSS PD threshold (level). This type of spatial multiplexing allows STAs to use the non-SRG OBSS PD threshold to ignore inter-BSS PPDUs under specific conditions. The second type is implemented based on the SRG OBSS PD threshold. This type of spatial multiplexing allows STAs to use the SRG OBSS PD threshold to ignore inter-BSS PPDUs identified as SRG PPDUs under specific conditions.

[0100] PSR-based spatial multiplexing can be achieved based on PSR opportunities.

[0101] A PSR opportunity can be identified from the value of the SPATIAL_REUSE parameter of the RXVECTOR of a triggered PPDU (e.g., HE TB PPDU) and / or the content of a trigger frame. A STA can initiate an SR transmission during a PSR opportunity during an ongoing PPDU when certain conditions are met to avoid interfering with the receiver's reception of the ongoing PPDU. If the value of the SPATIAL_REUSE parameter of the RXVECTOR of the ongoing PPDU is PSR not allowed (PSR_DISALLOW), PSR and non-SRG OBSS PD prohibited (PSR_AND_NON_SRG_OBSS_PD_PROHIBITED), no PSR-based spatial reuse (SR) transmission is allowed during that PPDU.

[0102] It should be noted that a STA that recognizes a PSR opportunity may choose not to perform a network allocation vector (NAV) update operation based on the received RXVECTOR parameter TXOP_DURATION and the trigger frame duration field.

[0103] The following describes an example of PSR-based spatial multiplexing with reference to Figure 7 . The method shown in Figure 7 can be performed by an AP, STAs associated with the AP (represented by STAs in Figure 7 ), and OBSS STAs. In Figure 7 , the OBSS STAs can include STAOBSS-A and STAOBSS-B. The PSR-based spatial multiplexing process shown in Figure 7 can include steps S710 to S740.

[0104] In step S710, the AP may send a triggering PPDU (triggering PPDU). The triggering PPDU may be a PSRR PPDU.

[0105] The trigger frame carried by the PSRR PPDU can trigger the transmission of the uplink HE TB PPDU.

[0106] Step S720: In response to receiving the PSRR PPDU, the STAs may send a HE TB PPDU.

[0107] In step S730, STAOBSS-A identifies a PSR opportunity and transmits a PSRT PPDU to another OBSS STA (ie, STAOBSS-B).

[0108] It should be noted that if the value of the RXVECTOR parameter BSS color (BSS_COLOR) of the HE TB PPDU matches the BSS color of the PSRR PPDU, the OBSS STA that recognizes the PSR opportunity (i.e., STAOBSS-A) should not transmit a PSRT PPDU that exceeds the PPDU duration of the HE TB PPDU triggered by the trigger frame of the PSRR PPDU (i.e., the duration from the common info field).

[0109] In step S740 , STAOBSS-B feeds back a block acknowledgment (BA) frame for the PSRT PPDU in step S430 .

[0110] Currently, spatial multiplexing methods provide random opportunities for stations to obtain spatial multiplexing-based transmissions. Typically, a STA in one BSS needs to monitor or receive PPDUs sent by another OBSS station to determine in real time whether spatial multiplexing transmission can be initiated, which may affect the communication quality of spatial multiplexing.

[0111] As shown in Figure 8, assume that the AP is associated with STA1 to STA3, where STA3's peer device is STA3-1. STA3-1 may or may not be associated with the AP. Furthermore, the communication between STA3 and STA3-1 may be, for example, P2P communication. The AP communicates with STA1 1. If STA3 prepares to communicate with STA3-1 2, STA3 may randomly initiate spatial multiplexing transmission. At this point, the communication between the AP and STA1 may affect the communication quality between STA3 and STA3-1. That is, the signal transmitted between the AP and STA1 may interfere with the signal transmitted between STA3 and STA3-1, resulting in a decrease in the communication quality between STA3 and STA3-1.

[0112] Therefore, to address the above issues, the present invention provides a wireless communication method. The applicant proposes that channel sounding can be performed before spatial multiplexing to determine whether spatial multiplexing is possible, thereby improving the transmission quality of spatial multiplexing. The wireless communication method according to the present invention is described below with reference to FIG9 . The method shown in FIG9 includes step S910 and / or step S920.

[0113] In step S910 , the second device sends a first frame to the first device.

[0114] In some implementations, the second device may be an AP, and the first device may be a STA, where the STA may be a station device that is not an access point).

[0115] In some implementations, the first device may be a device associated with the second device. For example, the second device is an AP, and correspondingly, the first device is a STA associated with the AP.

[0116] In some implementations, the first device and / or the second device may be single-site devices. In other implementations, the first device and / or the second device may be multi-link devices, where the relevant introduction to multi-link devices can be found above.

[0117] In some implementations, the first frame is used to trigger the first device to perform channel probing for spatial multiplexing, where the channel probing for spatial multiplexing can be understood as channel probing for determining the communication quality of spatial multiplexing. In other words, the result of the channel probing is used to determine whether to perform spatial multiplexing.

[0118] In the embodiments of the present application, the parameters determined by channel sounding are not limited. In some implementations, channel sounding is used to determine the path loss between a scheduled device and a scheduling device in spatial multiplexing transmission. For example, as shown in FIG8 , channel sounding is used to determine the path loss between STA1 to STA3 scheduled by the AP and the AP, respectively. In other implementations, channel sounding is used to determine the acceptable receive-end interference level for a second device. In other implementations, channel sounding is used to determine the path loss between multiple scheduled devices. For example, as shown in FIG8 , channel sounding is used to determine one or more of the following: the path loss between STA1 and STA3, the path loss between STA1 and STA2, and the path loss between STA3 and STA2. In other implementations, channel sounding is used to determine the path loss between a scheduled device and its peer devices. For example, as shown in FIG8 , channel sounding is used to determine one or more of the following: the path loss between STA1 and STA3-1, and the path loss between STA1 and STA3-1. In other implementations, channel sounding is used to determine the acceptable receive-end interference level for a scheduled device. For example, as shown in FIG8 , channel sounding is used to determine the acceptable receive-end interference level for STA3. In some other implementations, channel probing is used to determine an acceptable receive-end interference level for a scheduled device's peer device. For example, as shown in FIG8 , channel probing is used to determine an acceptable receive-end interference level for STA3 - 1 .

[0119] In the embodiments of the present application, there is no limitation on the implementation of the receiving end interference level. In some implementations, the receiving end interference level can be determined based on the SNR of the received detection signal.

[0120] In some scenarios, the channel detection for spatial multiplexing can be called "spatial multiplexing detection", and accordingly, the first frame can be called a "spatial multiplexing detection trigger frame".

[0121] In step S920 , in response to the first frame, the first device performs a first operation.

[0122] In some implementations, the first operation includes sending a sounding signal for channel sounding, that is, the first device may be a sender of the sounding signal.

[0123] In some other implementations, the first operation may include performing channel measurement based on a received sounding signal for channel detection, that is, the first device may perform channel measurement based on a sounding signal sent by another device.

[0124] In an embodiment of the present application, by introducing channel detection technology for spatial multiplexing, and based on the results of channel detection, it can be determined which scheduled devices and / or the corresponding opposite devices of the scheduled devices can participate in spatial multiplexing transmission, so as to improve the communication quality of spatial multiplexing.

[0125] In some implementations, the trigger types of the above-mentioned channel detection include one or more of the following: channel detection based on triggered TB variants; channel detection based on non-triggered non-TB variants; a mixed trigger type of channel detection based on triggered TB variants and channel detection based on non-triggered non-TB.

[0126] For channel sounding based on the triggered TB variant, the receiver of the sounding signal includes a second device and / or a third device, where the third device is configured to measure the degree of interference caused by the sounding signal on the third device's communications. In some implementations, the third device may be associated with the second device, or the third device may be a peer device of the first device. For example, as shown in Figure 8 , the second device is an AP, the first device is STA3, and the third device may include STA3-1.

[0127] In the embodiments of the present application, the third device is not limited. In some implementations, the third device can be a single-site device. In other implementations, the third device can be a multi-link device. For more information about multi-link devices, please refer to the above description.

[0128] Accordingly, in this type of channel sounding process, the sender of the sounding signal may include a scheduled device. For example, as shown in FIG8 , the scheduled devices include STA1 and STA2.

[0129] In some implementations, channel sounding based on a triggered TB variant can be used to measure interference caused by communications between a scheduled device and a scheduling device on communications between the scheduled device and other devices. For example, as shown in FIG8 , channel sounding based on a triggered TB variant can be used to measure interference caused by communications between STA1 and the AP on communications between STA3 and STA3-1, and interference caused by communications between STA2 and the AP on communications between STA3 and STA3-1.

[0130] In some implementations, the sounding signal sent during this type of channel sounding process may be referred to as a “TB PPDU” or a “TB sounding NDP (Sounding NDP).” The following describes the channel sounding based on the triggered TB variant in conjunction with Example 1.

[0131] For channel sounding based on the non-triggered non-TB variant, the receiver of the sounding signal used for channel sounding includes multiple third devices, which are used to determine path loss based on the sounding signal. In some implementations, the third device may be associated with the second device, or the third device may be a peer device of the first device. For example, as shown in Figure 8, the second device is an AP, the first device is STA3, and the third device may include STA3-1.

[0132] In the embodiments of the present application, the third device is not limited. In some implementations, the third device can be a single-site device. In other implementations, the third device can be a multi-link device. For more information about multi-link devices, please refer to the above description.

[0133] Accordingly, in this type of channel sounding process, the sender of the sounding signal may include a scheduled device. For example, as shown in FIG8 , the scheduled devices include STA1 and STA2.

[0134] In some implementations, channel sounding based on the non-triggered non-TB variant can be used to measure path losses between multiple scheduled devices and / or path losses between a scheduled device and other devices. For example, as shown in FIG8 , channel sounding based on the non-triggered non-TB variant can be used to measure: the path loss for communication between STA1 and STA3, the path loss for communication between STA1 and STA3-1, the path loss for communication between STA2 and STA3, and the path loss for communication between STA2 and STA3-1.

[0135] In some implementations, the sounding signal sent during this type of channel sounding process may be referred to as a "non-TB PPDU" or a "non-TB sounding NDP (Sounding NDP)." The following describes channel sounding based on a non-triggered non-TB variant in conjunction with Example 2.

[0136] For mixed-trigger channel sounding, the sounding signal associated with the channel sounding based on the triggered TB variant is the first sounding signal, and the sounding signal associated with the channel sounding based on the non-trigger non-TB variant is the second sounding signal. The receiving end of the first sounding signal includes the second device and the third device, and the receiving end of the second sounding signal includes the second device and / or the third device, wherein the third device and the second device are used to determine the signal-to-noise ratio of the received sounding signal. In some implementations, the third device can be associated with the second device, or the third device can be a peer device of the first device.

[0137] For example, as shown in Figure 8, the receiving end of the first detection signal includes AP (as an example of the second device) and STA3-1, and the receiving end of the second detection signal includes STA3 (as an example of the first device) and STA3-1 (as an example of the third device).

[0138] In the embodiments of the present application, the third device is not limited. In some implementations, the third device can be a single-site device. In other implementations, the third device can be a multi-link device. For more information about multi-link devices, please refer to the above description.

[0139] Accordingly, in this type of channel sounding process, the sender of the first sounding signal may include a scheduled device. For example, as shown in Figure 8 , the scheduled devices include STA1 and STA2. The sender of the second sounding signal may also include a scheduled device. For example, as shown in Figure 8 , the scheduled device includes STA3.

[0140] In some implementations, hybrid-triggered channel probing can be used to measure the acceptable interference level for the receiver of the probing signal. For example, as shown in FIG8 , hybrid-triggered channel probing can be used to measure the acceptable interference level for the AP and the acceptable interference level for STA3-1.

[0141] In some implementations, the first sounding signal may be referred to as a "TB PPDU" or a "TB sounding NDP (Sounding NDP)." The second sounding signal may be referred to as a "non-TB PPDU" or a "non-TB sounding NDP (Sounding NDP)." The following describes channel sounding based on a hybrid trigger type in conjunction with Example 3.

[0142] As described above, the first frame is used to trigger channel detection for spatial multiplexing. The following describes the first frame of an embodiment of the present application.

[0143] In some implementations, the first frame includes one or more of the following: information indicating that the first device is a sender of a detection signal; information indicating that the first device is a receiver of a detection signal; information indicating a trigger type of channel detection; and first identification information.

[0144] Taking information indicating that the first device is the sender of the probe signal as an example, in some implementations, the first frame may include a user information field for the first device, which may carry the aforementioned information. For example, in the user information field of the first device, the transmit or receive (TX / RX) subfield value may be set to a first value, indicating that the first device is the sender of the probe signal, where the first value may be 0 or 1.

[0145] In some scenarios, the sender of the sounding signal may be an interferer in the spatial multiplexing transmission process. For example, referring to FIG8 , the sender of the sounding signal may be STA1 or STA2.

[0146] In some implementations, if the first frame includes information indicating that the first device is a sender of the sounding signal, the first operation includes sending the sounding signal for channel sounding.

[0147] Taking information indicating that the first device is the receiver of the sounding signal as an example, in some implementations, the first frame may include a user information field for the first device, which may carry the aforementioned information. For example, in the user information field of the first device, the transmit or receive (TX / RX) subfield value may be set to a second value, indicating that the first device is the receiver of the sounding signal. The second value may be different from the first value described above, and may be, for example, 0 or 1.

[0148] In some scenarios, the receiver of the detection signal may be the interfered party in the spatial multiplexing transmission process. For example, referring to FIG8 , the receiver of the detection signal may be STA3 or STA3-1.

[0149] In some implementations, if the first frame includes information indicating that the first device is a receiver of a sounding signal, the first operation includes performing channel measurement based on the received sounding signal for channel sounding.

[0150] Taking the information indicating the trigger type of channel sounding as an example, the channel sounding trigger type indicated by the information includes one or more of the following: channel sounding based on a triggered TB variant; channel sounding based on a non-triggered non-TB variant; and a hybrid trigger type of channel sounding based on a triggered TB variant and a non-triggered non-TB variant. For related introductions, please refer to the previous article.

[0151] In some implementations, the field that carries information indicating the trigger type for channel sounding may be referred to as a "trigger type subfield." For example, when the value of the trigger type subfield is the first value, it indicates that the trigger type for channel sounding is TB variant-based channel sounding, or in other words, the first frame indicates a trigger frame for TB variant-based channel sounding, or in other words, the first frame is used to indicate sending a sounding signal for TB variant channel sounding.

[0152] For another example, when the value of the trigger type subfield is the second value, it indicates that the trigger type of the channel detection is channel detection based on the non-TB variant, or in other words, the first frame indicates a trigger frame for channel detection based on the non-TB variant, or in other words, the first frame is used to indicate the sending of a detection signal for channel detection for the non-TB variant.

[0153] When the value of the trigger type subfield is the third value, it indicates that the trigger type of channel detection is a mixed trigger type, that is, it instructs one or more devices as sending roles to send detection signals for channel detection of non-TB variants, and at the same time, instructs another one or more devices as sending roles to send detection signals for channel detection of TB variants.

[0154] It should be noted that in the embodiments of the present application, the first value, the second value, and the third value are different values. For example, the first value may be 0, the second value may be 1, and the third value may be 2. For another example, the first value may be 0, the second value may be 2, and the third value may be 1. For another example, the first value may be 1, the second value may be 0, and the third value may be 2.

[0155] Taking the first identification information as an example, in some implementations, the first identification information is used to identify the first frame that triggers channel sounding for spatial multiplexing. In some implementations, the first identification information can be carried in the token subfield. In other implementations, the token field can be located in the trigger dependency public information subfield. This is described below in conjunction with Table 1.

[0156] In the embodiment of the present application, the value of the first identification information may be determined by the initiator of the channel detection. For example, when the initiator of the channel detection is an AP, the value of the first identification information may be selected by the AP.

[0157] Table 1 shows the format of the Trigger Dependency Public Information subfield in an embodiment of the present application. As shown in Table 1, this field can include a Trigger Type subfield and a Token subfield. The Trigger Type subfield is used to carry information indicating the trigger type for channel sounding, and the Token subfield is used to carry first identification information. The Trigger Type subfield can occupy two bits, B0-B1, and the Token subfield can occupy three bits, B2-B4.

[0158] Table 1

[0159] The first frame in the embodiment of the present application is introduced above. In some implementations, the first frame can also be used to indicate the type of channel detection, which can include channel detection for spatial multiplexing (also known as spatial multiplexing detection).

[0160] In an embodiment of the present application, the information used to indicate the type of channel sounding may be carried in a common information field, for example, the trigger type subfield in the common information field. That is, the information used to indicate the type of channel sounding may be multiplexed with the information indicating the type of channel sounding trigger in the same field, as described below in conjunction with Table 2. Of course, in an embodiment of the present application, the information used to indicate the type of channel sounding may be transmitted in separate fields from the information indicating the type of channel sounding trigger.

[0161] Table 2 shows the format of the trigger type subfield in an embodiment of the present application. As shown in Table 2, this field may include a trigger type subfield. If the value of the trigger type subfield is a specific value (for example, 11), it can be used to carry an indication that the trigger frame variant is spatial multiplexing detection. In other words, the channel detection type triggered by the trigger frame (as an example of the first frame) is spatial multiplexing detection.

[0162] Table 2

[0163] In an embodiment of the present application, the frame structure of the first frame can be similar to the format of the trigger frame in a traditional communication system. In addition to the meanings of some fields introduced above, the meanings of other fields in the first frame can be similar to the meanings of each field in the trigger frame.

[0164] For ease of understanding, the following introduces the first frame in an embodiment of the present application in conjunction with Figures 10 and 11. Figure 10 shows the format of the user information field corresponding to the transmitter of the detection signal in an embodiment of the present application. As shown in Figure 10, the user information field in the first frame includes one or more of the following subfields: AID12, transmission or reception (TX / RX) subfield, RU allocation (RU allocation) subfield, trigger-based (TB) subfield, reserved subfield, SS allocation subfield, uplink target receive power subfield, PS160 subfield. Among them, if the above-mentioned user information field is associated with the first device, the transmission or reception (TX / RX) subfield is used to carry information indicating that the first device is the transmitter of the detection signal. The TB subfield is used to carry information indicating the trigger type of channel detection, and for details, please refer to the above introduction. The RU allocation (RU allocation) subfield is used to carry information indicating the RU occupied by the first device to transmit the detection signal. The uplink target receive power subfield is used to carry information about the power of sending the detection signal.

[0165] Figure 11 shows the format of the user information field corresponding to the receiving end of the detection signal in an embodiment of the present application. As shown in Figure 11, the user information field in the first frame includes one or more of the following subfields: AID12, transmit or receive (TX / RX) subfield, and reserved subfield. If the above user information field is associated with the first device, the transmit or receive (TX / RX) subfield is used to carry information indicating that the first device is the receiving end of the detection signal.

[0166] The above describes the channel detection process of the embodiment of the present application, which can also be referred to as the "spatial multiplexing detection phase." The following describes the measurement result reporting process provided by the embodiment of the present application. In some scenarios, this process can also be referred to as the "spatial multiplexing detection reporting phase."

[0167] In some implementations, if the first operation includes performing channel measurement based on a received sounding signal for channel sounding, the method further includes: the first device generating a channel sounding measurement report based on the channel measurement; and the first device sending a second frame to the second device, the second frame carrying the measurement report. In some scenarios, the second frame is also referred to as a sounding report frame, or an SR sounding report frame.

[0168] In some implementations, the second frame may be a UHR action no ack frame. Of course, in the embodiment of the present application, the second frame may be other frames introduced in WIFI versions after UHR.

[0169] In some implementations, the measurement report includes one or more of the following: information indicating the strength of the received signal; information indicating the channel bandwidth of the channel used for spatial multiplexing; information indicating the number of receiving chains associated with spatial multiplexing; information indicating whether it is appropriate to perform spatial multiplexing; information indicating the acceptable interference signal power of the receiving end associated with spatial multiplexing; information indicating the transmit power used by the transmitting end associated with spatial multiplexing to send signals; information indicating the average signal-to-noise ratio per RU of the space-time stream associated with spatial multiplexing; and second identification information.

[0170] In some implementations, the received signal strength information may include, for example, RSSI. In some implementations, the received signal strength information may be associated with a receive chain. For example, the received signal strength information may refer to the strength information of a signal received via the associated receive chain. The received signal may be a specific received signal or any signal transmitted via the receive chain.

[0171] In some implementations, the field that carries this information may be referred to as a "RSSI subfield."

[0172] In some implementations, the field carrying this information, which indicates the channel bandwidth of a channel used for spatial multiplexing, or the width of a channel for spatial multiplexing-based transmission, may be referred to as a "bandwidth subfield."

[0173] For example, when the value of the bandwidth subfield is 0, it indicates that the channel bandwidth of the channel used for spatial multiplexing is 20MHz. When the value of the bandwidth subfield is 1, it indicates that the channel bandwidth of the channel used for spatial multiplexing is 40MHz. When the value of the bandwidth subfield is 2, it indicates that the channel bandwidth of the channel used for spatial multiplexing is 80MHz. When the value of the bandwidth subfield is 3, it indicates that the channel bandwidth of the channel used for spatial multiplexing is 160MHz (or, an 80MHz channel combined with an 80MHz channel). When the value of the bandwidth subfield is 4, it indicates that the channel bandwidth of the channel used for spatial multiplexing is 320MHz. Of course, in an embodiment of the present application, this field can also carry other values, and other values ​​can be other channel bandwidths and reservations, "also known as reserved values."

[0174] In some implementations, the information used to indicate the transmit power used by the transmitter associated with spatial multiplexing to send signals includes the maximum transmit power and / or the minimum transmit power. That is, the measurement result can indicate the transmit power used by the transmitter associated with spatial multiplexing to send signals in terms of the maximum transmit power and / or the minimum transmit power.

[0175] In some implementations, the above-mentioned maximum transmit power (also called "required maximum transmit power") is used to indicate the maximum transmit power used by the transmitter associated with spatial multiplexing to send signals. That is, the required maximum transmit power indicates the maximum transmit power that the scheduled site needs to meet for spatial multiplexing transmission of PPDU. For example, the required maximum transmit power indicates the maximum joint transmit power of the transmit antenna connectors of all antennas used by the scheduled site to transmit PPDU. Typically, the unit of the required maximum transmit power is dBm / 20MHz. The maximum transmit power PTX(max) in units of dBm / 20MHz is calculated as: PTX(max) = -20 + FVal(max), where FVal(max) is the value of the maximum transmit power subfield. Typically, the maximum transmit power subfield retains a value greater than 60.

[0176] In some implementations, the field carrying the "maximum transmit power" may be referred to as the "required maximum transmit power subfield."

[0177] In some implementations, the above-mentioned minimum transmit power (also called "required minimum transmit power") is used to indicate the minimum transmit power used by the transmitter associated with spatial multiplexing to send signals. That is, the required minimum transmit power indicates the minimum transmit power that the scheduled site needs to meet for spatial multiplexing transmission of PPDU. For example, the required minimum transmit power indicates the minimum joint transmit power of the transmit antenna connectors of all antennas used to transmit PPDUs required for spatial multiplexing transmission by the scheduled site. Typically, the unit is dBm / 20MHz, and the minimum transmit power PTX(min) in dBm / 20MHz is calculated as PTX(min) = -20 + FVal(min), where FVal(min) represents the value of the required minimum transmit power subfield. Typically, the required minimum transmit power subfield retains a value greater than 60.

[0178] In some implementations, this field indicates the number of receive chains associated with spatial multiplexing, or in other words, the number of receive chains participating in spatial multiplexing transmission. In some scenarios, the value of this information can be the number of receive chains NRX minus 1. In other scenarios, the field carrying this information can be called a "receive chain subfield."

[0179] In some implementations, the information is used to indicate whether spatial multiplexing is suitable for execution, or in other words, the information is used to indicate whether a device currently participating in channel sounding can execute spatial multiplexing transmission.

[0180] For example, based on the received or detected PPDU (such as the TB PPDU sent by other scheduled sites to the AP) receiving signal power strength, determine whether it is suitable to perform spatial multiplexing-based transmission under the condition of being subjected to the same interference signal power as the PPDU receiving signal power.

[0181] In some implementations, the subfield carrying the above information may be referred to as an "SR subfield." Generally, if the value of this subfield is a first value, it indicates that spatial multiplexing-based transmission is suitable. If the value of this subfield is a second value, it indicates that spatial multiplexing-based transmission is not suitable. The first value and the second value are different. For example, the first value may be 0 and the second value may be 1. For another example, the first value may be 1 and the second value may be 0.

[0182] In some implementations, the receiving end associated with spatial multiplexing in the information indicating acceptable interference signal power (acceptable receiver interference signal power) of the receiving end associated with spatial multiplexing can be understood as a receiving end in a device participating in spatial multiplexing transmission. For example, the receiving end can include a second device.

[0183] In some implementations, the interference signal power acceptable to the receiving end can be obtained by measuring the signal strength of the PPDU (such as the TB PPDU sent by other scheduled sites to the AP) exchanged between other scheduled devices (e.g., sites) and the scheduling device (e.g., AP) at the antenna connector of the site participating in the spatial multiplexing transmission, and averaging the measured signal strength on the antenna to determine the interference signal power acceptable to the receiving end.

[0184] In some implementations, this value indicates the average signal-to-noise ratio (SNR) per RU for spatially multiplexed spacetime streams, where the spacetime streams associated with spatial multiplexing can be understood as the spacetime streams participating in spatial multiplexing. For example, the average SNR per RU is the arithmetic mean of the SNRs (in decibels) across the 26-subcarrier (26-tone) RUs for which feedback is requested. Furthermore, the average SNR per RU can be understood as the average SNR across each RU.

[0185] In some implementations, the above-mentioned per-RU average signal-to-noise ratio can be carried in the CQI report field. Accordingly, the CQI report field can adopt the HE CQI report field defined in the IEEE 802.11 specification. The HE CQI report field contains information about the link quality.

[0186] In some implementations, the second identification information is used to indicate the frame that triggers the channel detection associated with the measurement result, that is, the second identification information is used to indicate the first frame that triggers the channel detection associated with the measurement result. For example, if the second frame is associated with the first frame, or in other words, the measurement report carried in the second frame is obtained through the channel detection triggered by the first frame, then the second identification information in the second frame is associated with the first identification information in the first frame. In an embodiment of the present application, the association of the second identification information with the first identification information may include that the second identification information is the same as the first identification information, or the association of the second identification information with the first identification information may include that the second identification information and the first identification information have an associated relationship.

[0187] In some scenarios, the subfield carrying the second identification information may be referred to as a “token subfield”.

[0188] For ease of understanding, the second frame in the embodiment of the present application is introduced below in conjunction with Table 3, Table 4 and Figures 12 to 13. Table 3 shows the format of the action field in the second frame of the embodiment of the present application. As shown in Table 2, the action field format of the second frame may include, in order: a category field, a UHR action field, an SR report control field, a spatial multiplexing report field, and a CQI field. Among them, the category field is based on the relevant definition in the IEEE 802.11 standard. The UHR action field contains 1 byte, which follows the category field and is used to distinguish the UHR action frame format. As shown in Figure 12, the SR report control field may include the following subfields: token (Token), bandwidth (BW), number of receive chains (Nr), whether it is currently suitable for SR, acceptable receiver interference signal power (Acceptable Receiver Interference signal power), required minimum transmit power, required maximum transmit power, and the relevant introduction of each information can be found above.

[0189] Table 3

[0190] FIG13 is a schematic diagram of the format of the SR report field in an embodiment of the present application. Referring to FIG13 , the SR report field may include the following subfields: an RSSI-1 subfield, an RSSI-2 subfield, ..., an RSSI-NRX subfield. The RSSI-1 subfield indicates the RSSI of the PPDU detected (or designated to be received) by receiving chain 1, the RSSI-2 subfield indicates the RSSI of the PPDU detected (or designated to be received) by receiving chain 2, and so on. The RSSI-NRX subfield indicates the RSSI of the PPDU detected (or designated to be received) by receiving chain NRX.

[0191] Table 4 is a schematic diagram of the format of the RSSI-n subfield in an embodiment of the present application. As shown in Table 4, when the value of the RSSI-n subfield is 0, it indicates that RSSI (dBm) ≤ -82dBm. When the value of the RSSI-n subfield is 1, it indicates that the RSSI (dBm) is -81dBm. When the value of the RSSI-n subfield is 2, it indicates that the RSSI (dBm) is -80dBm. When the value of the RSSI-n subfield is 61, it indicates that the RSSI (dBm) is -21dBm. When the value of the RSSI-n subfield is 62, it indicates that the RSSI (dBm) is -20dBm. When the value of the RSSI-n subfield is 63-255, it indicates a reserved value.

[0192] Table 4

[0193] In some scenarios, the second frame may be triggered by the third frame. Of course, in the embodiments of the present application, the second frame may be autonomously sent by the first device. That is, before the first device sends the second frame to the second device, the above method includes: the second device sends the third frame to the first device, and the third frame is used to trigger the first device to send the second frame. In some scenarios, the third frame is also called a "spatial multiplexing report poll (SRRP) trigger frame."

[0194] In some implementations, the third frame is used to indicate resources for transmitting the second frame, where the resources may be, for example, RUs.

[0195] For ease of understanding, the following describes the third frame (also known as the "SR Report Poll (SRRP) trigger frame") of this embodiment of the present application in conjunction with Table 5 and Figure 14. As shown in Table 5, the Trigger Type subfield value in the Common Information field of the SRRP trigger frame can take a specific value (e.g., 10), indicating that its trigger frame variant is a spatial multiplexing report poll. In addition, the definitions of the other subfields in its Common Information field are the same as those of the corresponding subfields in the basic trigger frame.

[0196] Table 5

[0197] Figure 14 shows the format of the User Information field in the SRRP according to an embodiment of the present application. As shown in Figure 14 , the User Information field may include one or more of the following: AID12 subfield, RU Allocation subfield, Uplink FEC Coding Type subfield, UL MCS, UL DCM, SS Allocation / RA-RU Information, Uplink Target Received Power, and PS160. The AID12 subfield, UL FEC Coding Type subfield, and UL Target Received Power subfield are defined in the same way as the corresponding subfields in the Basic Trigger Frame.

[0198] In some implementations, if the SR Report Poll Trigger frame requests transmission of an HE TB PPDU, the "RU Allocation," "UL DCM," and "SS Allocation / RA-RU Information" fields are defined identically to the corresponding fields in the HE Variant User Information field. The "UL MCS" field is defined identically to the "UL HE MCS" field in the "HE Variant User Information" field. The PS160 field is reserved.

[0199] In some implementations, if the SR Report Poll Trigger frame requests the transmission of an EHT TB PPDU, the "RU Allocation," "SS Allocation / RA-RU Information," and "PS160" fields are defined identically to the corresponding fields in the EHT Variant User Information field. The UL MCS field is defined identically to the UL EHT MCS subfield in the EHT Variant User Information field. The "UL DCM" field is retained.

[0200] In some scenarios, before performing channel sounding, the second device may determine which devices can participate in the channel sounding. Typically, this phase may be referred to as the "spatial multiplexing sounding polling phase." Of course, in the embodiments of the present application, this phase may be omitted.

[0201] In some implementations, before the first device receives the first frame sent by the second device, the above method also includes: the second device sends a fourth frame to the first device, the fourth frame is used to indicate that the first device is expected to perform channel detection; in response to the fourth frame, the first device sends a response frame to the second device, the response frame is used to indicate that the first device confirms the execution of channel detection, wherein the response frame can be, for example, CTS.

[0202] In some scenarios, the fourth frame is used to indicate that the first device is expected to perform channel sounding, or in other words, the fourth frame is used to configure the first device to perform channel sounding.

[0203] In some scenarios, the first device may be a device requesting to participate in channel detection, that is, the fourth frame is used for the device expecting to request to participate in channel detection to perform channel detection, or the fourth frame is used to configure the device requesting to participate in channel detection to perform channel detection.

[0204] In some scenarios, the fourth frame may also be referred to as a "spatial multiplexing sounding poll (SR sounding poll) trigger frame".

[0205] In the embodiment of the present application, the response frame may also indicate that the first device is unable to perform channel sounding. Of course, in the embodiment of the present application, if the first device confirms that it is unable to perform channel sounding, the first device may not send a response frame to the second device, which helps to save transmission resources for transmitting the response frame.

[0206] In some implementations, the fourth frame is used to configure resources for transmitting a sounding signal for a transmitter of a channel sounding, where the resources may be, for example, units RU.

[0207] For ease of understanding, the format of the spatial multiplexing detection polling trigger frame of an embodiment of the present application is described below in conjunction with Figures 15 and 16. As shown in Figure 15, the spatial multiplexing detection polling trigger frame may include one or more of the following fields: frame control, duration, RA, TA, common information, user information list, padding, and FCS.

[0208] In some implementations, in the common information field of the multiplexed detection polling trigger frame, the trigger type subfield value can take a specific value, indicating that its trigger frame variant is SR detection polling, as shown in Table 6. The definitions of other subfields in its common information field are the same as the corresponding subfields of the basic trigger frame.

[0209] Table 6

[0210] Figure 16 shows the format of the user information field of the SR Probe Poll (SRSP) trigger frame in an embodiment of the present application. As shown in Figure 16, the user information field includes one or more of the following subfields: AID12 subfield, RU allocation subfield, uplink FEC coding type subfield, UL MCS, UL DCM, SS allocation / RA-RU information (SS Allocation / RA-RU Information), uplink target received power, and PS160. Among them, the AID12 subfield, UL FEC coding type subfield, and UL target received power subfield are defined in the same way as the corresponding subfields of the basic trigger frame.

[0211] In some implementations, if the SR Probe Poll Trigger frame requests the transmission of an HE TB PPDU, the "RU Allocation" field, "UL DCM" field, and "SS Allocation / RA-RU Information" field are defined identically to the corresponding fields in the HE Variant User Information field. The "UL MCS" field is defined identically to the "UL HE MCS" field in the "HE Variant User Information" field. The PS160 field is reserved.

[0212] In some implementations, if the SR Probe Poll Trigger frame requests the transmission of an EHT TB PPDU, the "RU Allocation," "SS Allocation / RA-RU Information," and "PS160" fields are defined identically to the corresponding fields in the EHT Variant User Information field. The UL MCS field is defined identically to the UL EHT MCS subfield in the EHT Variant User Information field. The "UL DCM" field is retained.

[0213] The above describes the spatial multiplexing detection polling phase, spatial multiplexing detection phase, and spatial multiplexing detection reporting phase of the embodiment of the present application. These three phases can be used individually or in combination with each other. The following uses Examples 1 to 6 as an example to describe the method of the embodiment of the present application using the three phases in combination.

[0214] Example 1: Spatial multiplexing detection process based on TB variant.

[0215] As shown in Figure 8, STA1 and STA2 are the senders of the detection NDP, the AP is the target receiver of the detection NDP, and STA3 and STA3-1 are also receivers of the detection NDP (that is, the detection NDP is used as the receiver of the interference signal). The detection process is mainly used to measure the degree of interference between STA1 and STA2 and the AP on the P2P transmission to be performed by STA3 and STA3-1.

[0216] The AP can send spatial multiplexing detection polling trigger frames to stations STA1, STA2, and STA3. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. After STA1, STA2, and STA3 confirm that spatial multiplexing detection can be performed, they reply with response frames.

[0217] It should be noted that if STA3-1 is not associated with the AP, the AP may not send the spatial multiplexing detection polling trigger frame to STA3-1. Correspondingly, if STA3-1 is associated with the AP, the AP may send the spatial multiplexing detection polling trigger frame to STA3-1.

[0218] During the SR detection phase, the AP sends a spatial multiplexing detection trigger frame based on the TB variant to STA1 and STA2. In the user information field pointing to STA1 and STA2 respectively, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA1 and STA2 are transmission roles (or transmission parties), that is, transmission TB detection NDP; in the user information field pointing to STA3 and / or STA3-1 respectively, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3 and / or STA3-1 are reception roles (or interfered parties), that is, monitoring or receiving TB detection NDP.

[0219] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 to allocate uplink resources to STA3 to report the detection report frame and feedback the signal reception parameters of the TB detection NDP, such as RSSI, RCPI and other information.

[0220] It should be noted that if STA3-1 is not associated with the AP, the AP may not send a spatial multiplexing detection report trigger frame to STA3-1. Accordingly, if STA3-1 is associated with the AP, the AP may send a spatial multiplexing detection report trigger frame to STA3-1. Accordingly, STA3-1 may feedback signal reception parameters such as RSSI and RCPI for receiving the TB detection NDP.

[0221] Example 2: Spatial multiplexing detection process based on TB variant.

[0222] As shown in Figure 17, STA1 and STA2 are the senders of the detection NDP, the AP is the target receiver of the detection NDP, and STA3 and STA3-1 are also receivers of the detection NDP (that is, the detection NDP is used as the receiver of the interference signal). The detection process is mainly used to measure the degree of interference between STA1 and STA2 and the AP on the P2P transmission to be performed by STA3 and STA3-1.

[0223] During the SR detection polling phase, the AP may send spatial multiplexing detection polling trigger frames to the stations STA1, STA2, STA3, and STA3-1. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. Accordingly, after STA1, STA2, STA3, and STA3-1 confirm that spatial multiplexing detection can be performed, they reply with a response frame (such as a CTS frame or a CTS-to-self frame). Among them, the AP may indicate in the spatial multiplexing detection polling trigger frame it sends that each RU is only allocated to one polled station, which can be addressed by the identification field corresponding to the user information field (such as the AID12 field); and if the polled station intends to participate in the spatial multiplexing detection exchange to be carried out, the AP responds with a cts-to-self frame in the RU assigned to the station in the spatial multiplexing detection polling trigger frame; otherwise, the station does not send a response to avoid unnecessary resource allocation. Accordingly, the AP does not include the station in this spatial multiplexing detection exchange.

[0224] The CTS-to-self frame is sent by the AP in the RU specified in the Spatial Multiplexing Probe Poll Trigger frame. If the corresponding User Information Field variant is indicated as the HE variant in the Spatial Multiplexing Probe Poll Trigger frame, it should be sent in the HE TB PPDU; if the corresponding User Information Field variant is the EHT variant, it should be sent in the EHT TB PPDU.

[0225] During the SR detection phase, the AP sends a spatial multiplexing detection trigger frame based on the TB variant to STA1 and STA2. In the user information field pointing to STA1 and STA2 respectively, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA1 and STA2 are transmission roles (or transmission parties), that is, transmission TB detection NDP; in the user information field pointing to STA3 and / or STA3-1 respectively, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3 and / or STA3-1 are reception roles (or interfered parties), that is, monitoring or receiving TB detection NDP.

[0226] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 and STA3-1, allocates uplink resources to STA3 and STA3-1 to report the detection report frame, and feeds back the signal reception parameters of the TB detection NDP, such as RSSI, RCPI and other information.

[0227] Optionally, during the spatial multiplexing detection exchange process, the frame spacing can be SIFS, where the frame spacing includes the frame spacing between the response frame of the spatial multiplexing detection polling trigger frame and the spatial multiplexing detection trigger frame, and the frame spacing between the TB detection NDP and the spatial multiplexing detection report trigger frame.

[0228] Example 3: Spatial multiplexing detection process based on non-TB variant.

[0229] As shown in FIG8 , STA1 and STA2 are the probe NDP senders, and STA3 and STA3-1 are the target receivers of the probe NDP. The probe process is mainly used to measure the path loss between STA1 and STA2 and STA3 or STA3-1, respectively.

[0230] The AP can send spatial multiplexing detection polling trigger frames to stations STA1, STA2, STA3 and STA3-1. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. After STA1, STA2, STA3 and STA3-1 confirm that spatial multiplexing detection can be performed, they reply with response frames (such as CTS frames or CTS-to-self frames).

[0231] It should be noted that if STA3-1 is not associated with the AP, the AP may not send the spatial multiplexing detection polling trigger frame to STA3-1. Correspondingly, if STA3-1 is associated with the AP, the AP may send the spatial multiplexing detection polling trigger frame to STA3-1.

[0232] In the SR detection phase, the AP first sends a spatial multiplexing detection trigger frame based on the non-TB variant to STA1, STA3, and STA3-1. In the user information field pointing to STA1, the transmit or receive (TX / RX) subfield value is set to 1, indicating that STA1 is the transmitting role (or transmitting party), that is, transmitting the Non-TB detection NDP; in the user information field pointing to STA3 and STA3-1 respectively, the transmit or receive (TX / RX) subfield value is set to 0, indicating that STA3 and STA3-1 are receiving roles, that is, listening to or receiving the Non-TB detection NDP. Then, the AP sends a spatial multiplexing detection trigger frame based on the non-TB variant to STA2, STA3 and STA3-1. In the user information field pointing to STA2, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA2 is a transmission role (or transmission party), that is, transmitting the Non-TB detection NDP; in the user information field pointing to STA3 and STA3-1 respectively, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3 and STA3-1 are receiving roles, that is, listening to or receiving the Non-TB detection NDP.

[0233] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 and STA3-1, allocates uplink resources to STA3 and STA3-1 to report the detection report frame, and feeds back the signal reception parameters of the non-TB detection NDP, such as RSSI, RCPI, and other information.

[0234] It should be noted that if STA3-1 is not associated with the AP, the AP may not send the spatial multiplexing detection report trigger frame to STA3-1.

[0235] Example 4: Spatial multiplexing detection process based on non-TB variant.

[0236] As shown in FIG18 , STA1 and STA2 are the senders of the sounding NDP, and STA3 and STA3-1 are the target receivers of the sounding NDP. The sounding process is mainly used to measure the path loss between STA1 and STA2 and STA3 or STA3-1 respectively.

[0237] During the SR detection polling phase, the AP may send spatial multiplexing detection polling trigger frames to stations STA1, STA2, STA3, and STA3-1. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. Accordingly, after STA1, STA2, STA3, and STA3-1 confirm that spatial multiplexing detection can be performed, they reply with a response frame (such as a CTS frame or a CTS-to-self frame). Among them, the AP may indicate in the spatial multiplexing detection polling trigger frame it sends that each RU is only allocated to one polled station, and the station can be addressed by the identification field corresponding to the user information field (such as the AID12 field); and if the polled station intends to participate in the upcoming spatial multiplexing detection exchange, the AP responds with a cts-to-self frame in the RU assigned to the station in the spatial multiplexing detection polling trigger frame; otherwise, the station does not send a response to avoid unnecessary resource allocation. Accordingly, the AP does not include the station in this spatial multiplexing detection exchange.

[0238] The CTS-to-self frame is sent by the AP in the RU specified in the Spatial Multiplexing Probe Poll Trigger frame. If the corresponding User Information Field variant is indicated as the HE variant in the Spatial Multiplexing Probe Poll Trigger frame, it should be sent in the HE TB PPDU; if the corresponding User Information Field variant is the EHT variant, it should be sent in the EHT TB PPDU.

[0239] In the SR detection phase, the AP first sends a spatial multiplexing detection trigger frame based on the non-TB variant to STA1, STA3, and / or STA3-1. In the user information field pointing to STA1, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA1 is a transmission role (or transmission party), that is, transmitting the Non-TB detection NDP; in the user information field pointing to STA3 and / or STA3-1 respectively, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3 and / or STA3-1 is a receiving role, that is, listening to or receiving the Non-TB detection NDP. Then, the AP sends a spatial multiplexing detection trigger frame based on the non-TB variant to STA2 and STA3, and / or STA3-1. In the user information field pointing to STA2, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA2 is a transmission role (or transmission party), that is, transmitting the Non-TB detection NDP; in the user information field pointing to STA3 and / or STA3-1 respectively, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3 and / or STA3-1 is a receiving role, that is, listening to or receiving the Non-TB detection NDP.

[0240] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 and / or STA3-1, allocates uplink resources to STA3 and / or STA3-1 to report the detection report frame, and feeds back the signal reception parameters of the non-TB detection NDP, such as RSSI, RCPI, and other information.

[0241] Optionally, during the spatial multiplexing detection exchange process, the frame spacing may be SIFS, where the frame spacing includes the frame spacing between the response frame of the spatial multiplexing detection polling trigger frame and the spatial multiplexing detection trigger frame, and the frame spacing between the TB detection NDP and the spatial multiplexing detection report trigger frame.

[0242] Example 5: Spatial multiplexing detection process based on hybrid triggering variant.

[0243] As shown in Figure 8, STA1 and STA2 are TB detection NDP senders, AP is the target receiver of TB detection NDP, STA3 is the Non-TB detection NDP sender, and STA3-1 is the target receiver of Non-TB NDP and also the receiver of TB detection NDP (that is, TB detection NDP is used as the receiver of the interference signal). The detection process is mainly used to measure the SNR and / or interference level of the target receiving end (AP and STA3-1) receiving the target PPDU when the AP exchanges frames with STA1 and STA2 based on TB PPDU and simultaneously performs spatial multiplexing-based transmission between STA3 and STA3-1.

[0244] The AP can send spatial multiplexing detection polling trigger frames to stations STA1, STA2, STA3 and STA3-1. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. After STA1, STA2, STA3 and STA3-1 confirm that spatial multiplexing detection can be performed, they reply with response frames (such as CTS frames or CTS-to-self frames).

[0245] During the SR detection phase, the AP sends a spatial multiplexing detection trigger frame based on a hybrid variant to STA1 and STA2, STA3 and STA3-1. In the user information field pointing to STA1 and STA2 respectively, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA1 and STA2 are transmission roles (or transmission parties), that is, transmission TB detection NDP; in the user information field pointing to STA3, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA3 is a transmission role (or transmission party), that is, transmission non-TB detection NDP; in the user information field pointing to STA3-1, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3-1 is a receiving role, that is, listening or receiving target detection NDP (Sounding NDP).

[0246] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 and STA3-1, allocates uplink resources to STA3 and STA3-1 to report the detection report frame, and feeds back the signal reception parameters of the TB detection NDP, such as RSSI, RCPI, and other information.

[0247] Example 6: Spatial multiplexing detection process based on hybrid triggering variant.

[0248] As shown in Figure 19, STA1 and STA2 are TB detection NDP senders, AP is the target receiver of TB detection NDP, STA3 is the Non-TB detection NDP sender, and STA3-1 is the target receiver of Non-TB NDP and also the receiver of TB detection NDP (that is, TB detection NDP is used as the receiver of the interference signal). The detection process is mainly used to measure the SNR and / or interference level of the target receiving end (AP and STA3-1) receiving the target PPDU when the AP exchanges frames with STA1 and STA2 based on TB PPDU and simultaneously performs spatial multiplexing-based transmission between STA3 and STA3-1.

[0249] During the SR detection polling phase, the AP may send spatial multiplexing detection polling trigger frames to the stations STA1, STA2, STA3, and STA3-1. These stations are assigned to poll for spatial multiplexing detection exchange and are expected to participate in the spatial multiplexing detection exchange. Accordingly, after STA1, STA2, STA3, and STA3-1 confirm that spatial multiplexing detection can be performed, they reply with a response frame (such as a CTS frame or a CTS-to-self frame). Among them, the AP may indicate in the spatial multiplexing detection polling trigger frame it sends that each RU is only allocated to one polled station, which can be addressed by the identification field corresponding to the user information field (such as the AID12 field); and if the polled station intends to participate in the spatial multiplexing detection exchange to be carried out, the AP responds with a cts-to-self frame in the RU assigned to the station in the spatial multiplexing detection polling trigger frame; otherwise, the station does not send a response to avoid unnecessary resource allocation. Accordingly, the AP does not include the station in this spatial multiplexing detection exchange.

[0250] The CTS-to-self frame is sent by the AP in the RU specified in the Spatial Multiplexing Probe Poll Trigger frame. If the corresponding User Information Field variant is indicated as the HE variant in the Spatial Multiplexing Probe Poll Trigger frame, it should be sent in the HE TB PPDU; if the corresponding User Information Field variant is the EHT variant, it should be sent in the EHT TB PPDU.

[0251] During the SR detection phase, the AP sends a spatial multiplexing detection trigger frame based on a hybrid variant to STA1 and STA2, STA3 and STA3-1. In the user information field pointing to STA1 and STA2 respectively, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA1 and STA2 are transmission roles (or transmission parties), that is, transmitting TB detection NDP; in the user information field pointing to STA3, the transmission or reception (TX / RX) subfield value is set to 1, indicating that STA3 is a transmission role (or transmission party), that is, transmitting non-TB detection NDP; in the user information field pointing to STA3-1, the transmission or reception (TX / RX) subfield value is set to 0, indicating that STA3-1 is a receiving role, that is, monitoring or receiving target detection NDP.

[0252] In the SR detection report phase, the AP sends a spatial multiplexing detection report trigger frame to STA3 and / or STA3-1, allocates uplink resources to STA3 and / or STA3-1 to report the detection report frame, and feeds back the signal reception parameters of the TB detection NDP, such as RSSI, RCPI and other information.

[0253] Optionally, during the spatial multiplexing detection exchange process, the frame spacing is SIFS, where the frame spacing includes the frame spacing between the response frame of the spatial multiplexing detection polling trigger frame and the spatial multiplexing detection trigger frame, and the frame spacing between the TB detection NDP and the spatial multiplexing detection report trigger frame.

[0254] In some implementations, the second device is an access point device, the first device and the third device are non-access point site devices, the first device is associated with the second device, and the third device is associated with the second device, or the third device is a peer device of the first device. The first device, the second device, and the third device can be single-site devices or multi-link devices.

[0255] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0256] FIG20 is a schematic diagram of a communication device according to an embodiment of the present application. The communication device 2000 shown in FIG20 is a first device, and includes a receiving unit 2010 and a processing unit 2020 .

[0257] A receiving unit 2010 is configured to receive a first frame sent by a second device, where the first frame is used to trigger the first device to perform channel sounding for spatial multiplexing; and / or

[0258] The processing unit 2020 is configured to perform a first operation in response to the first frame, where the first operation includes sending a sounding signal for the channel sounding, or performing channel measurement based on a received sounding signal for the channel sounding.

[0259] In the embodiment of the present application, the above-mentioned communication device 2000 can be used to execute some or all of the method steps executed by the first device in the above-mentioned method embodiment. For example, the communication device 2000 can be used to execute the scheme described above in conjunction with Figures 8 to 19. The communication device 2000 includes a module for executing the corresponding method functions of Figures 8 to 19 or performing the same steps, which will not be described in detail here, but those skilled in the art should know that the text descriptions corresponding to Figures 8 to 19 can be introduced into this embodiment and correspond to the modules in the communication device 2000.

[0260] FIG21 is a schematic diagram of a communication device according to an embodiment of the present application. The communication device 2100 shown in FIG21 is a second device, and the communication device 2100 includes a sending unit 2110 .

[0261] The sending unit 2110 is configured to send a first frame to a first device, where the first frame is used to trigger the first device to perform channel detection for spatial multiplexing.

[0262] In the embodiment of the present application, the above-mentioned communication device 2100 can be used to execute some or all of the method steps executed by the first device in the above-mentioned method embodiment. For example, the communication device 2100 can be used to execute the scheme described above in conjunction with Figures 8 to 19. The communication device 2100 includes a module for executing the corresponding method functions of Figures 8 to 19 or performing the same steps, which will not be described here. However, those skilled in the art should know that the text descriptions corresponding to Figures 8 to 19 can be introduced into this embodiment and correspond to the modules in the communication device 2100.

[0263] In an optional embodiment, the receiving unit 2010 may be a transceiver 2230, and the processing unit 2020 may be a processor 2210. The communication device 2000 may further include a memory 2220, as specifically shown in FIG22 .

[0264] In an optional embodiment, the sending unit 2110 may be a transceiver 2230. The communication device 1800 may further include a processor 2210 and a memory 2220, as specifically shown in FIG22 .

[0265] Figure 22 is a schematic diagram of the structure of an apparatus according to an embodiment of the present application. The dashed lines in Figure 22 indicate that the unit or module is optional. Apparatus 2200 may be used to implement the method described in the above method embodiment. Apparatus 2200 may be a chip, a terminal device, or a network device.

[0266] The device 2200 may include one or more processors 2210. The processor 2210 may support the device 2200 to implement the method described in the method embodiment above. The processor 2210 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0267] The apparatus 2200 may further include one or more memories 2220. The memories 2220 store programs that can be executed by the processor 2210, causing the processor 2210 to perform the methods described in the above method embodiments. The memories 2220 may be independent of the processor 2210 or integrated into the processor 2210.

[0268] The apparatus 2200 may further include a transceiver 2230. The processor 2210 may communicate with other devices or chips via the transceiver 2230. For example, the processor 2210 may transmit and receive data with other devices or chips via the transceiver 2230.

[0269] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0270] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0271] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0272] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0273] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0274] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0275] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0276] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0277] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0278] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0279] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0280] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include a WiFi protocol and related protocols used in future WiFi communication systems, and the present application does not limit this.

[0281] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0282] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0283] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0284] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0285] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: A first device receives a first frame sent by a second device, where the first frame is used to trigger the first device to perform channel sounding for spatial multiplexing; and / or In response to the first frame, the first device performs a first operation, where the first operation includes sending a sounding signal for channel sounding, or performing channel measurement based on a received sounding signal for channel sounding.

2. The method according to claim 1, wherein The first frame includes one or more of the following: Information used to indicate that the first device is a sender of the detection signal; Information used to indicate that the first device is a receiver of the detection signal; Information used to indicate a trigger type of the channel detection; The first identification information is used to identify the first frame that triggers the channel detection for the spatial multiplexing.

3. The method according to claim 2, wherein The trigger type of the channel detection includes one or more of the following: Channel detection based on triggered TB variants; Channel sounding based on non-trigger non-TB variant; A hybrid trigger type of channel sounding based on a triggered TB variant and a non-triggered non-TB variant.

4. The method according to claim 3, wherein The channel detection is the channel detection based on the triggered TB variant, and the receiving end of the detection signal used for the channel detection includes the second device and / or the third device, wherein the third device is used to measure the interference degree of the detection signal on the communication of the third device.

5. The method according to claim 3, wherein The channel detection is the channel detection based on the non-triggered non-TB variant, and the receiving end of the detection signal used for the channel detection includes one or more of the following: a second device, one or more third devices, wherein the one or more third devices are used to determine the path loss based on the detection signal.

6. The method according to claim 3, wherein The channel sounding is of the mixed trigger type, and the sounding signal associated with the channel sounding based on the triggered TB variant is a first sounding signal, and the sounding signal associated with the channel sounding based on the non-triggered non-TB variant is a second sounding signal, The receiving end of the first detection signal includes one or more of the following: the second device, one or more third devices, and the receiving end of the second detection signal includes the third device and / or the second device, wherein the third device and the second device are used to determine the signal-to-noise ratio of the target detection signal, wherein the target detection signal is a detection signal sent to the target recipient.

7. The method according to any one of claims 4 to 6, wherein The communication participating in the spatial multiplexing includes communication between a station and a peer station, the third device includes the peer station, and / or The first device includes a station for communicating with the second device, wherein the second device is an access point AP.

8. The method according to any one of claims 2 to 7, wherein The information for indicating that the first device is a sender of a detection signal, or the information for indicating that the first device is a receiver of a detection signal, is carried in a user information field associated with the first device in the first frame.

9. The method according to any one of claims 2 to 8, wherein If the first frame includes the information indicating that the first device is a sender of the sounding signal, the first operation includes sending a sounding signal for the channel sounding; or If the first frame includes the information indicating that the first device is a receiver of a sounding signal, the first operation includes performing channel measurement based on the received sounding signal used for the channel sounding.

10. The method according to any one of claims 1 to 9, wherein If the first operation includes performing channel measurement based on a received sounding signal used for channel sounding, the method further includes: The first device generates a measurement report of the channel sounding based on the channel measurement; The first device sends a second frame to the second device, where the second frame carries the measurement report.

11. The method according to claim 10, wherein The measurement report includes one or more of the following: Used to indicate the strength information of the received signal; information indicating whether it is appropriate to perform the spatial multiplexing; Information indicating a channel bandwidth of a channel used for the spatial multiplexing; Information indicating the number of receive chains associated with the spatial multiplexing; Used to indicate the average signal-to-noise ratio per RU of the spatiotemporal stream associated with the spatial multiplexing; Information used to indicate the acceptable interference signal power of the receiving end associated with the spatial multiplexing; Information used to indicate the transmit power used by the transmitting end associated with the spatial multiplexing to transmit the signal; Second identification information, where the second identification information is used to indicate a frame that triggers channel sounding associated with the measurement result.

12. The method according to claim 11, wherein The information for indicating the transmit power used by the transmitting end associated with the spatial multiplexing to transmit a signal includes a maximum transmit power and / or a minimum transmit power, The maximum transmit power is used to indicate the maximum transmit power used by the transmitting end associated with the spatial multiplexing to send signals; the minimum transmit power is used to indicate the minimum transmit power used by the transmitting end associated with the spatial multiplexing to send signals.

13. The method according to claim 11 or 12, wherein: The strength information of the received signal corresponds to the receiving chain associated with the spatial multiplexing.

14. The method according to any one of claims 10 to 13, wherein: Before the first device sends the second frame to the second device, the method includes: The first device receives a third frame sent by the second device, where the third frame is used to trigger the first device to send the second frame.

15. The method according to claim 14, wherein The third frame is used to indicate the RU for transmitting the second frame.

16. The method according to any one of claims 1 to 15, wherein Before the first device receives the first frame sent by the second device, the method further includes: The first device receives a fourth frame sent by the second device, where the fourth frame is used to indicate that the first device is expected to perform the channel sounding; In response to the fourth frame, the first device sends a response frame to the second device, where the response frame is used to indicate that the first device confirms performing the channel sounding.

17. The method according to claim 16, wherein The fourth frame is used to configure a resource unit RU for transmitting a sounding signal for the transmitting end of the channel sounding.

18. A wireless communication method, characterized in that: include: The second device sends a first frame to the first device, where the first frame is used to trigger the first device to perform channel sounding for spatial multiplexing.

19. The method according to claim 18, wherein The first frame includes one or more of the following: Information used to indicate that the first device is a sender of the detection signal; Information used to indicate that the first device is a receiver of the detection signal; Information used to indicate a trigger type of the channel detection; The first identification information is used to identify the first frame that triggers the channel detection for the spatial multiplexing.

20. The method according to claim 19, wherein The trigger type of the channel detection includes one or more of the following: Channel detection based on triggered TB variants; Channel sounding based on non-trigger non-TB variant; A hybrid trigger type of channel sounding based on a triggered TB variant and a non-triggered non-TB variant.

21. The method according to claim 20, wherein The channel detection is the channel detection based on the triggered TB variant, and the receiving end of the detection signal used for the channel detection includes the second device and / or the third device, wherein the third device is used to measure the interference degree of the detection signal on the communication of the third device.

22. The method according to claim 20, wherein The channel detection is the channel detection based on the non-triggered non-TB variant, and the receiving end of the detection signal used for the channel detection includes one or more of the following: a second device, one or more third devices, wherein the one or more third devices are used to determine the path loss based on the detection signal.

23. The method of claim 20, wherein: The channel sounding is of the mixed trigger type, and the sounding signal associated with the channel sounding based on the triggered TB variant is a first sounding signal, and the sounding signal associated with the channel sounding based on the non-triggered non-TB variant is a second sounding signal, The receiving end of the first detection signal includes one or more of the following: the second device, one or more third devices, and the receiving end of the second detection signal includes the third device and / or the second device, wherein the third device and the second device are used to determine the signal-to-noise ratio of the target detection signal, wherein the target detection signal is a detection signal sent to the target recipient.

24. The method according to any one of claims 21 to 23, wherein The communication participating in the spatial multiplexing includes communication between a station and a peer station, the third device includes the peer station, and / or The first device includes a station for communicating with the second device, wherein the second device is an access point AP.

25. The method according to any one of claims 19 to 24, wherein The information for indicating that the first device is a sender of a detection signal, or the information for indicating that the first device is a receiver of a detection signal, is carried in a user information field associated with the first device in the first frame.

26. The method according to any one of claims 18 to 25, wherein The method further comprises: The second device receives a second frame sent by the first device, where the second frame carries the measurement report.

27. The method according to claim 26, wherein The measurement report includes one or more of the following: Used to indicate the strength information of the received signal; information indicating whether it is appropriate to perform the spatial multiplexing; Information indicating a channel bandwidth of a channel used for the spatial multiplexing; Information indicating the number of receive chains associated with the spatial multiplexing; Used to indicate the average signal-to-noise ratio per RU of the spatiotemporal stream associated with the spatial multiplexing; Information used to indicate the acceptable interference signal power of the receiving end associated with the spatial multiplexing; Information used to indicate the transmit power used by the transmitting end associated with the spatial multiplexing to transmit the signal; Second identification information, where the second identification information is used to indicate a frame that triggers channel sounding associated with the measurement result.

28. The method of claim 27, wherein: The information for indicating the transmit power used by the transmitting end associated with the spatial multiplexing to transmit a signal includes a maximum transmit power and / or a minimum transmit power, The maximum transmit power is used to indicate the maximum transmit power used by the transmitting end associated with the spatial multiplexing to send signals; the minimum transmit power is used to indicate the minimum transmit power used by the transmitting end associated with the spatial multiplexing to send signals.

29. The method of claim 27, wherein: The strength information of the received signal corresponds to the receiving chain associated with the spatial multiplexing.

30. The method according to any one of claims 26 to 29, wherein Before the second device receives the second frame sent by the first device, the method includes: The second device sends a third frame to the first device, where the third frame is used to trigger the first device to send the second frame.

31. The method of claim 30, wherein: The third frame is used to indicate the RU for transmitting the second frame.

32. The method according to any one of claims 18 to 31, wherein Before the second device sends the first frame to the first device, the method further includes: a fourth frame sent by the second device to the first device, the fourth frame being used to indicate that the first device is expected to perform the channel sounding; In response to the fourth frame, the second device receives a response frame sent by the first device, where the response frame is used to instruct the first device to confirm performing the channel sounding.

33. The method of claim 32, wherein: The fourth frame is used to configure a resource unit RU for transmitting a sounding signal for the transmitting end of the channel sounding.

34. A communication device, characterized in that: The communication device is a first device, comprising: a receiving unit, configured to receive a first frame sent by a second device, wherein the first frame is used to trigger the first device to perform channel sounding for spatial multiplexing; and / or The processing unit is configured to perform a first operation in response to the first frame, where the first operation includes sending a sounding signal for the channel sounding, or performing channel measurement based on a received sounding signal for the channel sounding.

35. The communication device according to claim 34, wherein The first frame includes one or more of the following: Information used to indicate that the first device is a sender of the detection signal; Information used to indicate that the first device is a receiver of the detection signal; Information used to indicate a trigger type of the channel detection; The first identification information is used to identify the first frame that triggers the channel detection for the spatial multiplexing.

36. The communication device according to claim 35, wherein The trigger type of the channel detection includes one or more of the following: Channel detection based on triggered TB variants; Channel sounding based on non-trigger non-TB variant; A hybrid trigger type of channel sounding based on a triggered TB variant and a non-triggered non-TB variant.

37. The communication device according to claim 36, wherein The channel detection is the channel detection based on the triggered TB variant, and the receiving end of the detection signal used for the channel detection includes the second device and / or the third device, wherein the third device is used to measure the interference degree of the detection signal on the communication of the third device.

38. The communication device according to claim 36, wherein The channel detection is the channel detection based on the non-triggered non-TB variant, and the receiving end of the detection signal used for the channel detection includes one or more of the following: a second device, one or more third devices, wherein the one or more third devices are used to determine the path loss based on the detection signal.

39. The communication device according to claim 36, wherein The channel sounding is of the mixed trigger type, and the sounding signal associated with the channel sounding based on the triggered TB variant is a first sounding signal, and the sounding signal associated with the channel sounding based on the non-triggered non-TB variant is a second sounding signal, The receiving end of the first detection signal includes one or more of the following: the second device, one or more third devices, and the receiving end of the second detection signal includes the third device and / or the second device, wherein the third device and the second device are used to determine the signal-to-noise ratio of the target detection signal, wherein the target detection signal is a detection signal sent to the target recipient.

40. The communication device according to any one of claims 37 to 39, wherein: The communication participating in the spatial multiplexing includes communication between a station and a peer station, the third device includes the peer station, and / or The first device includes a station for communicating with the second device, wherein the second device is an access point AP.

41. The communication device according to any one of claims 35 to 39, wherein: The information for indicating that the first device is a sender of a detection signal, or the information for indicating that the first device is a receiver of a detection signal, is carried in a user information field associated with the first device in the first frame.

42. The communication device according to any one of claims 35 to 41, characterized in that If the first frame includes the information indicating that the first device is a sender of the sounding signal, the first operation includes sending a sounding signal for the channel sounding; or If the first frame includes the information indicating that the first device is a receiver of a sounding signal, the first operation includes performing channel measurement based on the received sounding signal used for the channel sounding.

43. The communication device according to any one of claims 34 to 42, characterized in that If the first operation includes performing channel measurement based on the received detection signal for the channel detection, the communication device further includes: a first sending unit, The processing unit is configured to generate a measurement report of the channel sounding based on the channel measurement; The first sending unit is configured to send a second frame to the second device, where the second frame carries the measurement report.

44. The communication device according to claim 43, wherein The measurement report includes one or more of the following: Used to indicate the strength information of the received signal; information indicating whether it is appropriate to perform the spatial multiplexing; Information indicating a channel bandwidth of a channel used for the spatial multiplexing; Information indicating the number of receive chains associated with the spatial multiplexing; Used to indicate the average signal-to-noise ratio per RU of the spatiotemporal stream associated with the spatial multiplexing; Information used to indicate the acceptable interference signal power of the receiving end associated with the spatial multiplexing; Information used to indicate the transmit power used by the transmitting end associated with the spatial multiplexing to transmit the signal; Second identification information, where the second identification information is used to indicate a frame that triggers channel sounding associated with the measurement result.

45. The communication device according to claim 44, wherein The information for indicating the transmit power used by the transmitting end associated with the spatial multiplexing to transmit a signal includes a maximum transmit power and / or a minimum transmit power, The maximum transmit power is used to indicate the maximum transmit power used by the transmitting end associated with the spatial multiplexing to send signals; the minimum transmit power is used to indicate the minimum transmit power used by the transmitting end associated with the spatial multiplexing to send signals.

46. ​​The communication device according to claim 44 or 45, characterized in that The strength information of the received signal corresponds to the receiving chain associated with the spatial multiplexing.

47. The communication device according to any one of claims 43 to 46, characterized in that The receiving unit is configured to receive a third frame sent by the second device, where the third frame is used to trigger the first device to send the second frame.

48. The communication device according to claim 47, wherein The third frame is used to indicate the RU for transmitting the second frame.

49. The communication device according to any one of claims 34 to 48, wherein: The receiving unit is configured to receive a fourth frame sent by the second device, where the fourth frame is used to indicate that the first device is expected to perform the channel sounding; The second sending unit is configured to send a response frame to the second device in response to the fourth frame, where the response frame is used to instruct the first device to confirm the execution of the channel sounding.

50. The communication device according to claim 49, wherein The fourth frame is used to configure a resource unit RU for transmitting a sounding signal for the transmitting end of the channel sounding.

51. A communication device, characterized in that The communication device is a second device, including: A sending unit is configured to send a first frame to a first device, where the first frame is used to trigger the first device to perform channel detection for spatial multiplexing.

52. The communication device according to claim 51, wherein The first frame includes one or more of the following: Information used to indicate that the first device is a sender of the detection signal; Information used to indicate that the first device is a receiver of the detection signal; Information used to indicate a trigger type of the channel detection; The first identification information is used to identify the first frame that triggers the channel detection for the spatial multiplexing.

53. The communication device according to claim 52, wherein The trigger type of the channel detection includes one or more of the following: Channel detection based on triggered TB variants; Channel sounding based on non-trigger non-TB variant; A hybrid trigger type of channel sounding based on a triggered TB variant and a non-triggered non-TB variant.

54. The communication device according to claim 53, wherein The channel detection is the channel detection based on the triggered TB variant, and the receiving end of the detection signal used for the channel detection includes the second device and / or the third device, wherein the third device is used to measure the interference degree of the detection signal on the communication of the third device.

55. The communication device according to claim 53, wherein The channel detection is the channel detection based on the non-triggered non-TB variant, and the receiving end of the detection signal used for the channel detection includes one or more of the following: a second device, one or more third devices, wherein the one or more third devices are used to determine the path loss based on the detection signal.

56. The communication device according to claim 53, wherein The channel sounding is of the mixed trigger type, and the sounding signal associated with the channel sounding based on the triggered TB variant is a first sounding signal, and the sounding signal associated with the channel sounding based on the non-triggered non-TB variant is a second sounding signal, The receiving end of the first detection signal includes one or more of the following: the second device, one or more third devices, and the receiving end of the second detection signal includes the third device and / or the second device, wherein the third device and the second device are used to determine the signal-to-noise ratio of the target detection signal, wherein the target detection signal is a detection signal sent to the target recipient.

57. The communication device according to any one of claims 54 to 56, characterized in that The communication participating in the spatial multiplexing includes communication between a station and a peer station, the third device includes the peer station, and / or The first device includes a station for communicating with the second device, wherein the second device is an access point AP.

58. The communication device according to any one of claims 52 to 57, characterized in that The information for indicating that the first device is a sender of a detection signal, or the information for indicating that the first device is a receiver of a detection signal, is carried in a user information field associated with the first device in the first frame.

59. The communication device according to any one of claims 51 to 58, wherein: The communication device further includes: The first receiving unit is configured to receive a second frame sent by the first device, where the second frame carries the measurement report.

60. The communication device according to claim 59, wherein The measurement report includes one or more of the following: Used to indicate the strength information of the received signal; information indicating whether it is appropriate to perform the spatial multiplexing; Information indicating a channel bandwidth of a channel used for the spatial multiplexing; Information indicating the number of receive chains associated with the spatial multiplexing; Used to indicate the average signal-to-noise ratio per RU of the spatiotemporal stream associated with the spatial multiplexing; Information used to indicate the acceptable interference signal power of the receiving end associated with the spatial multiplexing; Information used to indicate the transmit power used by the transmitting end associated with the spatial multiplexing to transmit the signal; Second identification information, where the second identification information is used to indicate a frame that triggers channel sounding associated with the measurement result.

61. The communication device according to claim 60, wherein The information for indicating the transmit power used by the transmitting end associated with the spatial multiplexing to transmit a signal includes a maximum transmit power and / or a minimum transmit power, The maximum transmit power is used to indicate the maximum transmit power used by the transmitting end associated with the spatial multiplexing to send signals; the minimum transmit power is used to indicate the minimum transmit power used by the transmitting end associated with the spatial multiplexing to send signals.

62. The communication device according to claim 60, wherein The strength information of the received signal corresponds to the receiving chain associated with the spatial multiplexing.

63. The communication device according to any one of claims 59 to 62, characterized in that The sending unit is configured to send a third frame to the first device, where the third frame is used to trigger the first device to send the second frame.

64. The communication device according to claim 63, wherein The third frame is used to indicate the RU for transmitting the second frame.

65. The communication device according to any one of claims 51 to 64, characterized in that The sending unit is configured to send a fourth frame to the first device, where the fourth frame is used to indicate that the first device is expected to perform the channel sounding; The second receiving unit is configured to receive a response frame sent by the first device in response to the fourth frame, where the response frame is used to instruct the first device to confirm performing the channel detection.

66. The communication device according to claim 65, wherein The fourth frame is used to configure a resource unit RU for transmitting a sounding signal for the transmitting end of the channel sounding.

67. A communication device, characterized in that The communication device comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal so that the communication device executes the method according to any one of claims 1 to 33.

68. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to cause the device to execute the method according to any one of claims 1 to 33.

69. A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 33.

70. A computer-readable storage medium, characterized in that A program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1 to 33.

71. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 33.

72. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 33.

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