Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first AP sends a first trigger frame, the first trigger frame comprising first information and second information, wherein the first information is used for instructing a second AP to perform multi-AP cooperative transmission on a first bandwidth, the second information is used for instructing a first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the operating bandwidth of the first AP. In the present invention, hybrid transmission involving multi-AP cooperative transmission and single-AP transmission can be implemented on the operating bandwidth of the first AP. Firstly, the invention is capable of utilizing the bandwidth on which multi-AP cooperative transmission cannot be performed, thereby improving the utilization efficiency of the frequency spectrum; secondly, the invention reduces limitations on the operating bandwidth of shared APs, allowing more diversified shared APs to participate in multi-AP cooperative transmission; and furthermore, the remaining bandwidth of multi-AP cooperative transmission is not idle, thus preventing the second bandwidth from being preempted by other APs or STAs due to being idle for too long.

Description

Wireless communication method and communication device Technical Field

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

[0002] With the development of technology, the Institute of Electrical and Electronics Engineers (IEEE) communication standards have proposed a technical solution for multi-access point (AP) collaboration. Multi-AP collaboration allows multiple APs to share transmission resources to improve transmission resource utilization.

[0003] In some cases, part of the shared AP's operating bandwidth may not be available for multi-AP coordinated transmission. For example, if the shared AP's operating bandwidth is smaller than the sharing AP's, multi-AP coordinated transmission may not be available for the remaining bandwidth of the shared AP's operating bandwidth. A corresponding solution has not yet been clarified in the relevant art.

[0004] Summary of the Invention

[0005] The present application provides a wireless communication method and a communication device. The following introduces various aspects involved in the present application.

[0006] In a first aspect, a wireless communication method is provided, the method comprising: a first AP sends a first trigger frame (TF); wherein the first trigger frame comprises first information and second information, the first information being used to instruct the second AP to perform multi-AP collaborative transmission at a first bandwidth, and the second information being used to instruct a first station (STA) to communicate with the first AP at a second bandwidth, and the first bandwidth and the second bandwidth both being working bandwidths of the first AP.

[0007] In a second aspect, a wireless communication method is provided, the method comprising: a first device receiving a first trigger frame sent by a first AP; wherein the first device includes a second AP and / or a first STA, the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

[0008] According to a third aspect, a communication device is provided, which is a first AP. The communication device includes: a sending unit for sending a first trigger frame; wherein the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

[0009] In a fourth aspect, a communication device is provided, which is a first device, and the device includes: a receiving unit for receiving a first trigger frame sent by a first AP; wherein the first device includes a second AP and / or a first STA, and the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

[0010] 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 method of the first aspect and / or the second aspect.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] Based on this application, a hybrid transmission of multi-AP collaborative transmission and single-AP transmission can be achieved on the working bandwidth of the first AP. On the one hand, this application can utilize bandwidth that cannot be used for multi-AP collaborative transmission for single-AP transmission, thereby improving spectrum utilization efficiency. On the other hand, this application can reduce the restrictions on the working bandwidth of shared APs, allowing a more diverse range of shared APs to participate in multi-AP collaborative transmission. On the other hand, this application can minimize the idle bandwidth remaining in multi-AP collaborative transmission, thereby preventing the situation where the bandwidth is idle for too long and is preempted by other APs or STAs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0017] FIG2 is a diagram showing an example of a multi-AP collaborative transmission scenario.

[0018] FIG3 is a diagram illustrating an example of a coordinated transmission bandwidth in coordinated orthogonal frequency division multiple access (C-OFDMA) transmission.

[0019] FIG4 is an example diagram of collaborative uplink multi-user multiple input multiple output (UL MU-MIMO) transmission.

[0020] FIG5 is a diagram illustrating an example of coordinated beamforming / nulling.

[0021] FIG6 is an example diagram of collaborative space reuse.

[0022] FIG. 7 is a diagram illustrating an example of multi-AP joint transmission.

[0023] FIG8 is a diagram illustrating an example of coordinated time division multiple access (C-TDMA).

[0024] FIG9A is a diagram illustrating an example scenario in which the working bandwidth of a sharing AP is equal to the working bandwidth of a shared AP.

[0025] FIG9B is a diagram illustrating an example of a scenario in which the working bandwidth of the sharing AP is greater than the working bandwidth of the shared AP.

[0026] FIG9C is a diagram illustrating an example scenario in which the working bandwidth of the sharing AP is smaller than the working bandwidth of the shared AP.

[0027] FIG10 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0028] FIG11A is a schematic diagram of the format of a first trigger frame provided in an embodiment of the present application.

[0029] FIG. 11B is a schematic diagram of the format of the common information field.

[0030] FIG. 11C is a schematic diagram showing the format of the special user information field.

[0031] FIG. 11D is a diagram illustrating the format of a variant user information field.

[0032] FIG12 is a schematic diagram of the format of an ultra-high reliability (UHR) physical layer protocol data unit (PPDU).

[0033] FIG13 is a diagram illustrating an example of a frequency aggregated-physical layer protocol data unit (FA-PPDU).

[0034] Figure 14 is a schematic diagram of the hybrid transmission process provided in Example 1 of the present application.

[0035] Figure 15A is a schematic diagram of a scenario applicable to Example 2 of the present application.

[0036] Figure 15B is a schematic diagram of the first bandwidth and the second bandwidth provided in Example 2 of the present application.

[0037] Figure 15C is a schematic diagram of the hybrid transmission process provided in Example 2 of the present application.

[0038] Figure 16A is a schematic diagram of a scenario applicable to Example 3 of the present application.

[0039] Figure 16B is a schematic diagram of the first bandwidth and the second bandwidth provided in Example 3 of the present application.

[0040] Figure 16C is a schematic diagram of the hybrid transmission process provided in Example 3 of the present application.

[0041] FIG17 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0042] Figure 18 is a schematic structural diagram of another communication device provided in an embodiment of the present application.

[0043] FIG19 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solution in this application will be described below with reference to the accompanying drawings.

[0045] Communication System

[0046] 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) or other communication systems.

[0047] 1 is a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include an access point (AP) 110 and a station (STA) 120 accessing a network through the access point 110.

[0048] In some scenarios, an AP is also called an AP STA. In a sense, an AP is also a STA.

[0049] In some scenarios, a STA is also called a non-AP STA.

[0050] The communication in the communication system 100 can be communication between an AP and a STA, communication between STAs, 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, a peer STA may be an AP or a STA.

[0051] An AP acts as a bridge between wired and wireless networks, connecting wireless network clients together and then connecting the wireless network to the Ethernet. An AP can be a terminal device with a WiFi chip (such as a mobile phone) or a network device (such as a router).

[0052] It should be understood that the role of STA in the communication system is not absolute. For example, in some scenarios, when a mobile phone is connected to a router, the mobile phone is a STA. When the mobile phone serves as a hotspot for other mobile phones, the mobile phone acts as an AP.

[0053] APs and STAs can be devices used in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras, smart remote controls, smart water and electricity meters in smart homes, and sensors in smart cities.

[0054] In some embodiments, both the STA and the AP may support the 802.11be standard. The STA or AP may also support various current and future 802.11 family WLAN standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0055] There are one or more links between the station and the access point. In some embodiments, the station and the access point support multi-band communication. For example, communication is performed simultaneously on the 2.4 GHz, 5 GHz, 6 GHz, 45 GHz, and 60 GHz bands, or communication is performed simultaneously on different channels in the same band (or different bands), thereby improving the communication throughput and / or reliability between devices. Such a device is generally referred to as a multi-band device, or a multi-link device (MLD), sometimes also referred to as a multi-link entity or a multi-band entity. A multi-link device can be an access point device or a station device. If the multi-link device is an access point device, the multi-link device includes one or more APs; if the multi-link device is a station device, the multi-link device includes one or more non-AP STAs.

[0056] A multi-link device including one or more APs may be referred to as an access point multi-link device (AP MLD), and a multi-link device including one or more non-AP STAs may be referred to as a non-AP multi-link device (Non-AP MLD).

[0057] In an embodiment of the present application, the AP may include multiple APs, the Non-AP may include multiple STAs, multiple links may be formed between the APs in the AP and the STAs in the Non-AP, and data communication may be performed between the APs in the AP and the corresponding STAs in the Non-AP through the corresponding links.

[0058] In an embodiment of the present application, a STA may be a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. that supports WLAN / WiFi technology.

[0059] The frequency bands supported by WLAN technology may include but are not limited to: low frequency bands (such as 2.4 GHz, 5 GHz, and 6 GHz) and high frequency bands (such as 45 GHz and 60 GHz).

[0060] FIG1 exemplarily shows an AP and two STAs. Optionally, the communication system 100 may include multiple APs and other numbers of STAs, which is not limited in the embodiments of the present application.

[0061] It should be understood that in the embodiments of the present application, a device having communication functionality in a network / system may be referred to as a communication device. Taking the communication system 100 shown in FIG1 as an example, the communication device may include an access point 110 and a station 120 having communication functionality. Access point 110 and station 120 may be the specific devices described above and will not be described in detail here. The communication device may also include other devices in the communication system 100, such as a network controller, a gateway, or other network entities, which is not limited in the embodiments of the present application.

[0062] APs and STAs can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which APs and STAs are located.

[0063] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0064] Multi-AP collaborative transmission

[0065] With the development of technology, some communication standards (such as IEEE 802.11 UHR (Wi-Fi 8)) have proposed a multi-AP collaboration solution. Multi-AP collaboration allows multiple APs to share transmission resources to improve transmission resource utilization.

[0066] The following describes some of the terms used in multi-AP collaboration.

[0067] An AP candidate set may refer to a set of APs that can initiate or participate in multi-AP collaboration.

[0068] A shared AP may refer to an AP that obtains a TXOP and initiates multi-AP collaboration. At least one AP in an AP candidate set can become a shared AP.

[0069] A shared AP can participate in multi-AP collaboration initiated by a shared AP in the same AP candidate set.

[0070] Multi-AP collaboration may include a multi-AP collaboration preparation phase and a multi-AP collaboration communication phase (or multi-AP collaboration transmission phase), which are described below.

[0071] During the multi-AP collaboration preparation phase, a shared AP obtains a TXOP and initiates multi-AP collaboration. A shared AP can send a first frame to one or more APs in the same AP candidate set to inquire about their intention to participate in multi-AP collaboration. One or more APs will respond with a second frame to inform the shared AP whether it intends to participate in multi-AP collaboration. If an AP intends to participate in multi-AP collaboration, it becomes the shared AP in the multi-AP collaboration.

[0072] In the multi-AP cooperative communication phase, the sharing AP and one or more shared APs can participate in multi-AP cooperative transmission. Alternatively, the sharing AP may not participate in multi-AP cooperative transmission; two or more shared APs can participate in multi-AP cooperative transmission.

[0073] Figure 2 shows an example of an AP candidate set. The AP candidate set shown in Figure 2 includes three APs: AP1, AP2, and AP3. For example, AP1 can obtain a TXOP as a shared AP and initiate multi-AP collaboration; AP2 and AP3 can participate in multi-AP collaboration as shared APs. AP1, AP2, and AP3 can participate in multi-AP collaboration during a TXOP. For another example, AP2 can obtain a TXOP and initiate multi-AP collaboration as a shared AP; AP1 and AP3 can participate in multi-AP collaboration as shared APs. During a TXOP, AP1 and AP3 may participate in multi-AP collaboration, but AP2 may not.

[0074] Multi-AP transmission modes may include: coordinated UL MU-MIMO, coordinated beamforming (C-BF), coordinated spatial reuse (C-SR), multi-AP joint transmission (joint transmission), C-TDMA, and C-OFDMA. These are described below.

[0075] C-OFDMA

[0076] In C-OFDMA transmission, the sharing AP and / or one or more shared APs may send their respective DL MU PPDUs or TB PPDUs requesting uplink data to their associated STAs in different frequency parts of the coordinated transmission bandwidth.

[0077] Figure 3 illustrates an example of the coordinated transmission bandwidth in C-OFDMA transmission. As shown in Figure 3, the coordinated transmission bandwidth is 40 MHz. Within 20 MHz of this 40 MHz, an AP participating in multi-AP transmission can exchange data with associated STA1, STA2, or STA3. Within the remaining 20 MHz of this 40 MHz, another AP participating in multi-AP transmission can exchange data with associated STA4 or STA5.

[0078] Collaborative UL MU-MIMO

[0079] In multi-AP collaborative UL MU-MIMO transmission, the sharing AP and / or one or more shared APs can send TB PPDUs requesting uplink data across the entire collaborative transmission bandwidth, with each non-AP STA assigned a different spatial stream. For example, one or more APs participating in multi-AP collaboration can send a collaborative UL trigger frame to their associated STAs. In response to the collaborative UL trigger frame, the STA can transmit an uplink data frame. The uplink data frames transmitted by each STA can be fully aligned.

[0080] Figure 4 is an example diagram of collaborative UL MU-MIMO transmission. As shown in Figure 4, shared AP1 (AP1 for short) is associated with STA1, and shared AP2 (AP2 for short) is associated with STA2. The shared AP sends a multi-AP trigger frame (M-AP TF). AP1 sends a collaborative UL trigger frame to STA1. AP2 sends a collaborative UL trigger frame to STA2. STA1 and STA2 both send a UL PPDU including a data frame. The UL PPDUs sent by STA1 and STA2 are fully aligned. After receiving the UL PPDU sent by STA1, AP1 sends a block acknowledgement (BA) frame to STA1. After receiving the UL PPDU sent by STA2, AP2 sends a BA frame to STA2.

[0081] Collaborative beamforming

[0082] Collaborative beamforming, similar to null steering, can achieve interference suppression. For example, when transmitting or receiving data, the AP can enhance the beam toward the target STA. Another example is when transmitting or receiving data, the AP can null the spatial radiation toward non-target STAs.

[0083] Figure 5 illustrates an example of coordinated beamforming / nulling. As shown in Figure 5, AP1, STA1, and STA2 belong to basic service set (BSS) 1; AP2, STA3, and STA4 belong to BSS2. AP1 and AP2 perform nulling on each other's STAs within the other's BSS. Specifically, AP1 nulls the spatial radiation of STA3 and STA4, while AP2 nulls the spatial radiation of STA1 and STA2.

[0084] Collaborative space reuse

[0085] Cooperative spatial multiplexing may refer to reducing interference between APs through joint power control, thereby enabling multiple APs to transmit in parallel and maximizing the total throughput.

[0086] Since it does not need to consider synchronization and channel state information (CSI) collection, does not require physical layer (PHY) changes, and STAs do not need protocol updates, collaborative spatial multiplexing can be implemented with relatively low complexity. In other words, compared with other multi-AP cooperation schemes, collaborative spatial multiplexing can achieve low complexity and high performance (throughput and delay) gains.

[0087] Figure 6 shows an example of collaborative spatial multiplexing. As shown in Figure 6, AP1 and STA1 belong to BSS1, while AP2 and STA2 belong to BSS2. AP1 and AP2 can exchange control information. Based on this control information, AP1 and AP2 can perform interference control on STAs in each other's BSSs. Specifically, AP1 can perform interference control on STA2, and AP2 can perform interference control on STA1.

[0088] Multi-AP joint transmission

[0089] Multi-AP joint transmission (referred to as joint transmission) means that at least two APs simultaneously send data to a target user (i.e., target STA). The data sent by multiple APs occupies the same frequency domain resources (cooperative bandwidth) and is distinguished by different spatial streams. Joint transmission is transparent to the target STA receiving the data. In other words, the target STA cannot distinguish whether the received data is transmitted through multi-AP joint transmission. Before joint transmission, APs can transmit data for the same target STA via a backhaul link. Backhaul messages between APs can be transmitted via wired or wireless connections.

[0090] Figure 7 illustrates an example of multi-AP joint transmission. As shown in Figure 7, AP1 and AP2 can implement multi-AP joint transmission. AP1 and AP2 can simultaneously send data to one or more of STA1, STA2, STA3, and STA4. STA1 and STA2 may belong to BSS1. STA3 and STA4 may belong to BSS2. Data destined for the same STA can be transmitted between AP1 and AP2 over a backhaul link.

[0091] Compared to single-AP transmission, multi-AP joint transmission increases the number of antennas, thereby increasing the total number of spatial streams. Furthermore, multi-AP joint transmission can simultaneously serve multiple STAs, thereby improving system throughput. Furthermore, multi-AP joint transmission ensures that the target STA receives channels from multiple locations, thereby enhancing transmission reliability.

[0092] C-TDMA

[0093] C-TDMA may refer to: a sharing AP assigning a time period in its acquired TXOP to a shared AP. During the time period assigned to the shared AP, the shared AP may perform any PPDU transmission, including sending a DL PPDU or requesting an UL PPDU.

[0094] Figure 8 is an example diagram of C-TDMA. As shown in Figure 8, the TXOP gained by the sharing AP can be allocated to shared AP1 and shared AP2. Within the time allocation given to shared AP1, shared AP1 can transmit a downlink PPDU and receive a corresponding BA frame. Alternatively, within the time allocation given to shared AP1, shared AP1 can transmit a trigger frame to request an uplink trigger-based (TB) PPDU.

[0095] Multi-AP collaborative transmission process

[0096] When multi-AP cooperative transmission is performed, the shared AP first sends a multi-AP trigger frame. The multi-AP trigger frame can indicate one or more of the following information: multi-AP cooperative transmission mode, PPDU parameters and other information.

[0097] Multi-AP cooperative transmission modes may include: C-OFDMA, cooperative UL MU-MIMO, C-BF, C-SR, multi-AP joint transmission, or C-TDMA.

[0098] PPDU parameters may include one or more of the following: uplink or downlink indication, bandwidth, number of HE / EHT / UHR-LTF symbols, LDPC extra symbol segment, pre-FEC filling factor, PE disambiguation (PE Disambiguity), resource unit (RU) allocation, FEC coding type, modulation and coding scheme (MCS), spatial stream allocation,

[0099] Each shared AP that receives the multi-AP trigger frame can prepare and transmit downlink PPDU according to the instructions of the multi-AP trigger frame. In addition, the triggered shared AP can also use the multi-AP trigger frame for phase offset estimation and time synchronization.

[0100] Bandwidth of multi-AP collaborative transmission

[0101] The operating bandwidths of multiple APs participating in multi-AP coordinated transmission can be the same or different, resulting in variations in the coordinated transmission bandwidth (referred to as the coordinated bandwidth) used by the APs for multi-AP coordinated transmission. For example, multiple APs may need to use overlapping operating bandwidths for non-C-OFDMA multi-AP coordinated transmission. In other words, the coordinated bandwidth must be within the overlapping operating bandwidth. The following uses sharing APs and shared APs as examples to illustrate the coordinated bandwidth requirements in three scenarios.

[0102] In case 1, the working bandwidth of the shared AP is equal to the working bandwidth of the shared AP.

[0103] For case 1, the working bandwidth of the sharing AP or the working bandwidth of the shared AP can be the collaborative bandwidth.

[0104] Figure 9A illustrates an example of scenario 1. As shown in Figure 9A , AP1 is a shared AP; AP2 is a shared AP. The operating channel of AP1's BSS has a bandwidth of 320 MHz (indicated by 320 MHz - 1 in the figure), and the operating channel of AP2's BSS also has a bandwidth of 320 MHz. Furthermore, the operating channels of AP1's BSS and AP2's BSS completely overlap. Therefore, the collaborative bandwidth for multi-AP collaborative transmission between AP1 and AP2 can be 320 MHz.

[0105] Case 2: The working bandwidth of the shared AP is greater than the working bandwidth of the shared AP.

[0106] For case 2, the working bandwidth of the shared AP may be the collaborative bandwidth.

[0107] Figure 9B is an example diagram for Case 2. As shown in Figure 9B , AP1 is a shared AP; AP2 is a shared AP. The operating channel of AP1's BSS has a bandwidth of 320 MHz (indicated by 320 MHz - 1 in the figure), and the operating channel of AP2's BSS has a bandwidth of 160 MHz. As shown in Figure 9B , the collaborative bandwidth for multi-AP collaborative transmission between AP1 and AP2 is the 160 MHz bandwidth corresponding to the operating channel of AP2's BSS. Multi-AP collaborative transmission is not possible in the remaining 160 MHz bandwidth of AP1's BSS.

[0108] Case 3: The working bandwidth of the shared AP is smaller than the working bandwidth of the shared AP.

[0109] For case 3, the working bandwidth of the shared AP may be the collaborative bandwidth.

[0110] Figure 9C is an example diagram for Case 3. As shown in Figure 9C , AP1 is a shared AP; AP2 is a shared AP. The operating channel of AP1's BSS has a bandwidth of 160 MHz. The operating channel of AP2's BSS has a second bandwidth of 320 MHz (indicated by 320 MHz - 2 in the figure). As shown in Figure 9C , the collaborative bandwidth for multi-AP collaborative transmission between AP1 and AP2 is the 160 MHz bandwidth corresponding to the operating channel of AP2's BSS. Multi-AP collaborative transmission is not possible in the remaining 160 MHz bandwidth of AP2's BSS.

[0111] As can be seen from the above, in some cases, part of the shared AP's operating bandwidth will not be available for multi-AP coordinated transmission. For example, if the shared AP's operating bandwidth is smaller than the sharing AP's, the remaining bandwidth of the shared AP's operating bandwidth will not be available for multi-AP coordinated transmission. For example, in the scenario shown in Figure 9B, AP1's lower 160 MHz bandwidth will not be available for multi-AP coordinated transmission. In related art, it is not clear how to handle bandwidth that is not available for multi-AP coordinated transmission.

[0112] Figure 10 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application to solve the above problem. The method shown in Figure 10 can be performed by a first AP and a first device.

[0113] The method shown in FIG. 10 may include step S1010 .

[0114] Step S1010: A first AP sends a first trigger frame to a first device.

[0115] The first device may include a second AP and / or a first STA. The first STA may, for example, be a non-AP STA associated with the first AP. That is, the recipient of the first trigger frame may be an AP or a non-AP STA. In multi-AP collaborative transmission, the first AP may be a shared AP, and the second AP may be a shared AP.

[0116] The first trigger frame may include first information and second information. The first information and the second information are described below respectively.

[0117] The first information may be used to instruct or trigger the second AP to perform multi-AP coordinated transmission on the first bandwidth. It is understood that the first bandwidth may be a coordinated bandwidth. Based on the first information, the second AP may perform multi-AP coordinated transmission on the coordinated bandwidth.

[0118] It should be noted that this application does not limit the type of multi-AP cooperative transmission. For example, the type of multi-AP cooperative transmission may include: cooperative UL MU-MIMO, C-BF, C-SR, multi-AP joint transmission, or C-TDMA. For another example, the type of multi-AP cooperative transmission may be non-C-OFDMA.

[0119] The multi-AP coordinated transmission indicated by the first information may be participated in by multiple APs. The multiple APs may include the second AP; the multiple APs may or may not include the first AP. For example, if the multi-AP coordinated transmission is participated in by multiple shared APs, the first AP may not participate in the multi-AP coordinated transmission. For another example, if the multi-AP coordinated transmission is participated in by a sharing AP and at least one shared AP, the first AP may participate in the multi-AP coordinated transmission.

[0120] The second information can be used to instruct or trigger the first STA to communicate with the first AP over the second bandwidth. In other words, the second information can be used to instruct the first AP to perform single-AP transmission with the first STA. Alternatively, the second information can be used to indicate the transmission bandwidth of the first AP for single-AP transmission. It is understood that single-AP transmission is in contrast to multi-AP collaborative transmission. That is, during single-AP transmission, only one AP participates, or the AP participating in single-AP transmission does not need to exchange information with other APs. The second bandwidth can also be referred to as a non-collaborative bandwidth.

[0121] It should be noted that the first AP may perform single-AP transmission only with the first STA on the second bandwidth; alternatively, the first AP may perform single-AP transmission with multiple STAs on the second bandwidth. The multiple STAs may include the first STA. For example, if the first AP performs single-AP transmission only with the first STA on the second bandwidth, the first STA may use the entire second bandwidth for communication. For another example, if the first AP performs single-AP transmission with multiple STAs on the second bandwidth, the first STA may use a portion of the second bandwidth for communication. For another example, if the first AP performs single-AP transmission with multiple STAs on the second bandwidth, the first STA may use the entire second bandwidth for communication. The first STA may use the entire second bandwidth for MU-MIMO communication with the first AP.

[0122] The first bandwidth and the second bandwidth may both belong to the operating bandwidth of the first AP. The first bandwidth and the second bandwidth may not overlap. In some embodiments, the first bandwidth and the second bandwidth may constitute the operating bandwidth of the first AP. That is, the first bandwidth and the second bandwidth may occupy the entire operating bandwidth of the first AP.

[0123] In some embodiments, the first bandwidth may be the operating bandwidth of the second AP. For example, if the operating bandwidth of the first AP is greater than the operating bandwidth of the second AP, the second bandwidth may be the remaining bandwidth within the operating bandwidth of the first AP excluding the operating bandwidth of the second AP. Referring to Figure 9B , the operating bandwidth of the first AP is 320 MHz. The operating bandwidth of the second AP is the upper 160 MHz of the 320 MHz. After excluding the operating bandwidth of the second AP, the remaining bandwidth of the first AP's operating bandwidth is the lower 160 MHz. The first bandwidth may be the upper 160 MHz of the 320 MHz operating bandwidth of the first AP. The second bandwidth may be the lower 160 MHz of the 320 MHz operating bandwidth of the first AP.

[0124] Based on this application, a hybrid of multi-AP collaborative transmission and single-AP transmission can be implemented within the first AP's operating bandwidth. On the one hand, if part of the first AP's operating bandwidth is not suitable for multi-AP collaborative transmission, the first AP can, based on the instruction of the first trigger frame, perform single-AP transmission with the first STA, thereby improving spectrum utilization efficiency. On the other hand, if the operating bandwidth of the shared AP is required to be the same as that of the sharing AP to achieve higher spectrum utilization, certain restrictions on the shared AP's operating bandwidth are required. However, based on this application, even if the operating bandwidth of the shared AP (i.e., the second AP) is smaller than that of the sharing AP, higher spectrum utilization can still be achieved. Therefore, this application can reduce restrictions on the operating bandwidth of the shared AP, enabling a more diverse range of shared APs to participate in multi-AP collaborative transmission. Furthermore, through the instruction of the second information, the remaining bandwidth for multi-AP collaborative transmission can be used as the second bandwidth for single-AP transmission. Therefore, this remaining bandwidth will not be idle, thus preventing the remaining bandwidth from being idle for too long and being preempted by other APs or STAs.

[0125] It should be noted that the communication between the first STA and the first AP indicated by the second information may be a first transmission mode. The first transmission mode may include one or more of the following: single-user transmission, MU-MIMO transmission, OFDMA transmission, and non-OFDMA (non-OFDMA) transmission. For example, the first transmission mode may be OFDMA MU-MIMO transmission or non-OFDMA MU-MIMO transmission.

[0126] It should be noted that if the first transmission mode includes OFDMA MU-MIMO transmission, the first STA and the first AP can communicate on part of the second bandwidth. If the first transmission mode includes non-OFDMA MU-MIMO transmission, the first STA and the first AP can communicate on the entire second bandwidth.

[0127] The format of the first trigger frame is described in detail below with reference to FIG. 11A to FIG. 11C .

[0128] Figure 11A illustrates an example format of a trigger frame. This trigger frame may be a first trigger frame. As shown in Figure 11A , the trigger frame may include one or more of the following fields: frame control, duration, receiver address (RA), transmission address (TA), common information, user information list, padding, and frame check sequence (FCS). The common information field, user information list field, and padding field are described below.

[0129] 1) Public information fields

[0130] The public information field mainly carries public information. Figure 11B is an example diagram of the format of the public information field.

[0131] As shown in Figure 11B, the common information field may include one or more of the following fields: trigger type, downlink length (DL length), more trigger frames (more TF), carrier sensing required (CS required), downlink bandwidth (DL BW), guard interval and HE / EHT / UHR-LTF type / trigger TXOP sharing mode (GI And HE / EHT / UHR-LTF type / trigger TXOP sharing mode), number of HE / EHT / UHR-LTF symbols (number of HE / EHT / UHR-LTF symbols), low-density parity check extra symbol segment (LDPC extra symbol segment), AP TX power (AP TX power), Pre-FEX padding factor (Pre-FEC padding factor), PE disambiguation (PE disambiguation), downlink spatial reuse (DL spatial reuse), HE / EHT / UHR P160, special user info field flag (special user info field flag), EHT reserved (EHT reserved), and trigger dependent common info.

[0132] 2) User information list field

[0133] The User Information List field consists of one or more User Information fields. In some types of trigger frames (e.g., UHR trigger frames), the User Information List field includes one or more Special User Information fields and / or multiple Variant User Information fields. A Variant User Information field, for example, may be a UHR Variant User Information field. The following describes the Special User Information field and the Variant User Information field separately.

[0134] The special user information field may carry the necessary universal signal field (U-SIG) subfield of the requested PPDU. The special user information field may be located after the common information field in the trigger frame. Figure 11C is an example diagram of the format of the special user information field. As shown in Figure 11C, the special user information field may include one or more of the following fields: association identifier 12 (AID12), physical layer version indication (PHY version identifier), downlink bandwidth extension (DL BW extension), spatial reuse 1 (spatial reuse 1), spatial reuse 2 (spatial reuse 2), U-SIG disregard and validate (U-SIG disregard and validate), and trigger-based user type.

[0135] It should be noted that the AID12 subfield of each special user information field should be set to a different fixed value, wherein the fixed value may be 2007 or 2008, for example.

[0136] The variant user information field can carry information about the STA (including AP and non-AP STA) indicated by the AID12 subfield. As can be seen, the content indicated by the AID12 subfield in the variant user information field is different from that indicated by the AID12 subfield in the special user information field.

[0137] Figure 11D shows an example format of the variant user information field. As shown in Figure 11D , the variant user information field may include one or more of the following fields: association identifier 12 (AID12), resource unit allocation (RU allocation), downlink forward error correction coding type (DL FEC coding type), downlink ultrahigh-resolution modulation and coding strategy (DL UHR-MCS), spatial stream allocation / random access resource unit information (SS allocation / RA-RU information), downlink target received signal strength indicator (DL target RSSI), PS160, and trigger-based user type.

[0138] 3) Fill in the fields

[0139] The Padding field may appear in a trigger frame to extend the frame length. This frame length extension allows the STA receiving the trigger frame sufficient time to prepare a response PPDU and transmit the response PPDU after the short interframe space (SIFS) of the trigger frame. The Padding field can have a variable length. For example, the Padding field is at least 2 bytes long. The Padding field can be set to all 1s.

[0140] In some embodiments, the first trigger frame may be a multi-AP trigger frame. Whether the trigger frame is a multi-AP trigger frame may be indicated by a trigger type field in the trigger frame. For example, if the value of the trigger type field in the trigger frame is any value between 9 and 15 (e.g., 9), the trigger frame may be a multi-AP trigger frame.

[0141] In related technologies, multi-AP trigger frames are only used to trigger multi-AP coordinated transmission. However, in this application, multi-AP trigger frames can also trigger single-AP transmission. In other words, a single multi-AP trigger frame can trigger both multi-AP coordinated transmission and single-AP transmission, thereby reducing the number of trigger frames sent and saving communication resources.

[0142] In some embodiments, the first trigger frame may further include third information. The third information may be used to indicate the sum of the first bandwidth and the second bandwidth.

[0143] Illustratively, the third information can be carried in the DL BW field of the common information field and the DL BW extension field of the special user information field. That is, the DL BW field and the DL BW extension field jointly indicate the sum of the first bandwidth and the second bandwidth. The sum of the first bandwidth and the second bandwidth can also be expressed as the sum of the PPDU bandwidths for multi-AP coordinated transmission and single-AP transmission. Table 1 shows an example of how the DL BW field and the DL BW extension field jointly indicate the sum of the first bandwidth and the second bandwidth.

[0144] Table 1

[0145] It should be noted that Table 1 is merely an example. Some of the content in Table 1 can be implemented independently. For example, each row in Table 1 can be implemented independently. For another example, some of the content in Table 1 can be deleted. For another example, Table 1 can also include other content.

[0146] In some embodiments, the first information or the second information may be carried in a first field. It is understood that the first field may carry both the first information and the second information. For example, the first trigger frame may include multiple first fields. Among the multiple first fields, one may carry the first information, while another may carry the second information. In other words, among the multiple first fields, some may carry information related to single-AP transmission, while some may carry information related to multi-AP coordinated transmission.

[0147] The first field may include a device identification field. The device identification field may, for example, indicate AID information. Through the device identification field, it can be distinguished whether the first field indicates the first information or the second information.

[0148] For example, if the value of the device identification field is in the first range, the first field may indicate first information. Alternatively, if the value of the device identification field is in the second range, the first field may indicate second information. For example, the first range may be the AP identification range, and the second range may be the STA (non-AP STA) identification range. Alternatively, the first range may be, for example, 1-2007. The second range may be, for example, 2008-N. N may be a value greater than 2008, and may be a value less than or equal to 2044. N may be predefined, preconfigured, or configurable.

[0149] For another example, when the device identification field indicates the identification of the second AP, the first field may indicate the first information. Alternatively, when the device identification field indicates the identification of the first STA, the first field may indicate the second information.

[0150] In some embodiments, the first field may include the variant user information field or the user information field described above. The device identification field may include the AID12 field in the variant user information field. Table 2 shows the correspondence between the range of AID12 values ​​and the indicated information.

[0151] Table 2

[0152] In the related art, the values ​​of the AID12 field are reserved from 2008 to 2044. Table 2 uses the reserved values ​​in AID12 to indicate that the corresponding user information field points to the shared AP, thereby illustrating that the user information field is used to indicate multi-AP collaborative transmission.

[0153] In some embodiments, the first information may include information about the first bandwidth; the second information may include information about the second bandwidth. The information about the first bandwidth may include information about the resource unit (RU) or multiple resource units (MRU) corresponding to the first bandwidth. The RU or MRU corresponding to the first bandwidth may be used for collaborative transmission by each shared AP of multi-AP collaborative transmission. The information about the second bandwidth may include information about the RU or MRU corresponding to the second bandwidth. The RU or MRU corresponding to the second bandwidth may be used by the first AP for single AP transmission. The information about the RU or MRU may include one or more of the following: RU or MRU size, RU or MRU index, and physical layer RU or MRU index.

[0154] The information of the first bandwidth or the information of the second bandwidth can be carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field. The correspondence between the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field and the RU or MRU can refer to the description of the bandwidths of 40MHz, 80MHz, 160MHz and 320MHz in Table 9-45l of EEE 802.11 be Draft 4.0. Among them, the values ​​corresponding to the small-size RU or MRU in Table 9-45l can be set to reserved. It should be noted that this application may only use part of the content in Table 9-45l, or add or modify part of the content in Table 9-45l.

[0155] In some embodiments, if the device identified by the AID12 field of the variant user information field is an AP, the corresponding RU or MRU is used for multi-AP cooperative transmission.

[0156] In some embodiments, if the device identified by the AID12 field of the variant user information field is a non-AP STA, the corresponding RU or MRU is used for single AP transmission.

[0157] In some embodiments, the first STA may need to switch its operating channel. For example, if the first STA's operating bandwidth is less than the sum of the first and second bandwidths, the first STA may switch its operating channel to the channel with the second bandwidth. For another example, if the first STA's operating bandwidth is equal to the sum of the first and second bandwidths, the first STA may not switch its operating channel and only receive and decode information on the channel with the second bandwidth, while ignoring (or ignoring) information outside of the channel with the second bandwidth.

[0158] In some embodiments, the first STA may send fourth information to the first AP. The fourth information may be used to indicate a first duration. The first duration may be the time required for the first STA to switch the working channel to the second bandwidth. In other words, the first duration may be the switching delay for the first STA to switch to the second bandwidth.

[0159] The first AP can determine a first duration based on the first information, and thereby adjust the length of the first trigger frame based on the first duration, thereby providing sufficient time for the first STA to switch to the second bandwidth. For example, the first AP can pad the first trigger frame based on the first duration to extend the duration of the first trigger frame. The padding can, for example, be medium access control (MAC) frame padding.

[0160] In some embodiments, the fourth information may be carried in a capabilities element. The capabilities element may be, for example, a UHR capabilities element. The capabilities element may be present in the following frames: a probe request frame, an association request frame, or a reassociation request frame.

[0161] In some embodiments, the first STA may send the fourth information when establishing an association with the first AP.

[0162] Optionally, the capability element may include a field indicating the fourth information. This field may be, for example, a newly added field in the capability element. The newly added field may be, for example, a channel switch delay field. Exemplarily, the encoding of the channel switch delay field may correspond to the first duration or the interval in which the first duration is located. For example, the encoding of the channel switch delay field as 0 may indicate that the first duration is 0us. For another example, the encoding of the channel switch delay field as 1 may indicate that the first duration is 32us or that the interval in which the first duration is located is 0-32us. For another example, the encoding of the channel switch delay field as 2 may indicate that the first duration is 64us or that the interval in which the first duration is located is 32-64us.

[0163] It should be noted that for non-AP STAs, the channel switching delay can be encoded as described above. For APs, the channel switching delay field can be set to reserved because the AP does not need to perform channel switching.

[0164] Table 3 shows the definition and coding example of the channel switching delay field.

[0165] Table 3

[0166] It should be noted that the "channel switching delay field" is only an example of the name of the field indicating the fourth information. That is, the field indicating the fourth information can use other field names.

[0167] As mentioned above, the first AP can fill the first trigger frame according to the first duration. The filling method is described in detail below.

[0168] In some embodiments, the first trigger frame may indicate that a STA (i.e., the first STA) is communicating with the first AP on the second bandwidth, or that the first AP is communicating only with the first STA on the second bandwidth. It is understood that in this case, the first trigger frame may include a user information field indicating a non-AP STA. In this case, the first AP may pad the first trigger frame according to the first duration indicated by the first STA. For example, the first AP's padding time may be greater than or equal to the first duration.

[0169] In some embodiments, the first trigger frame may indicate that multiple STAs are communicating with the first AP over the second bandwidth, or that the first AP is performing single-AP transmission with multiple STAs over the second bandwidth. The multiple STAs include the first STA. It is understood that in this case, the first trigger frame may contain user information fields for multiple non-AP STAs. In this case, the first AP may pad the first trigger frame according to a second duration. The second duration may be related to the first duration. For example, the first AP's padding time may be greater than or equal to the second duration.

[0170] Exemplarily, the second duration may be the maximum value of the time required for multiple STAs to switch the working channel to the second bandwidth. For example, the second duration may be the maximum value of the durations indicated by the channel switching delay fields carried by multiple STAs.

[0171] After the first STA and the first AP complete the frame interaction sequence on the second channel, the first STA can switch the working channel back to the original working channel within the first time length. That is, the first STA can switch the working channel back to the primary channel. Depending on the different types of transmissions performed by the first STA and the first AP, the frame interaction sequence may be different. For example, if C-TDMA transmission is performed, the frame interaction sequence may include multiple groups of PPDU and BA interactions after the first trigger frame. For another example, if collaborative UL MU-MIMO, C-BF, C-SR or joint transmission is performed, the frame interaction sequence may only include one group of PPDU and BA interaction after the first trigger frame. This is because these transmission types need to be synchronized through trigger frames each time a PPDU is transmitted.

[0172] It should be noted that this application does not limit the type of PPDU used by the first AP for multi-AP collaborative communication or single AP communication. For example, the first PPDU used by the first AP for communication may be a UHR PPDU. The UHR MU PPDU is illustrated below with reference to FIG12.

[0173] The UHR MU PPDU format shown in Figure 12 is used for transmission to one or more users. The UHR MU PPDU may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a repeated legacy signal (RL-SIG), a U-SIG field, a UHR-SIG field, a UHR-STF field, a UHR-LTF field, a data field, and a PE field. In a UHR MU PPDU, the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and UHR-SIG may be referred to as pre-UHR modulated fields, while the UHR-STF, UHR-LTF, data, and PE fields may be referred to as UHR modulated fields. For a UHR PPDU, each UHR-LTF symbol has the same GI duration as each data symbol, which is 0.8 μs, 1.6 μs, or 3.2 μs, respectively. The UHR-LTF field consists of three types: 1x UHR-LTF, 2x UHR-LTF, and 4x UHR-LTF. The duration of each 1x UHR-LTF, 2x UHR-LTF, or 4x UHR-LTF symbol without a GI is 3.2μs, 6.4μs, or 12.8μs, respectively. The duration of a data symbol without a GI is 12.8μs.

[0174] As mentioned above, the first AP may or may not participate in multi-AP coordinated transmission. When the first AP participates in multi-AP coordinated transmission, it must transmit the first PPDU to the first STA via single-AP transmission over the second bandwidth within the first AP's operating bandwidth. The first AP must then collaborate with other APs to transmit the second PPDU over the first bandwidth.

[0175] It should be noted that the PPDU formats of the first PPDU and the second PPDU may be the same or different, and this application does not limit this. For example, the first PPDU may be: HE PPDU, EHT PPDU, or UHR PPDU, etc. The second PPDU may be a PPDU format that is the same as or different from the first PPDU, such as HE PPDU, EHT PPDU, or UHR PPDU.

[0176] It should be noted that the lengths (i.e., durations) of the first PPDU and the second PPDU may be the same. After the first AP completes a PPDU and BA frame transmission, the next multi-AP cooperative transmission can be triggered at the same time.

[0177] In some embodiments, the first AP may transmit the first PPDU and the second PPDU via a FA-PPDU.

[0178] For ease of understanding, the FA-PPDU technology is first explained below.

[0179] Based on the FA-PPDU, the throughput of BSSs with large bandwidths (e.g., 320 MHz) (e.g., EHT BSSs) can be maximized. A FA-PPDU can consist of multiple PPDUs. Multiple PPDUs occupy one or more non-overlapping frequency domain bandwidths. Furthermore, each PPDU is orthogonal symbol by symbol in the frequency domain. It should be noted that each PPDU can have the same or different PPDU formats, such as HE PPDU, EHT PPDU, etc.

[0180] Figure 13 is an example diagram of a FA-PPDU. As shown in Figure 13, a FA-PPDU can occupy a 320 MHz frequency bandwidth. A FA-PPDU can include PPDU-1 and PPDU-2. PPDU-1 and PPDU-2 each occupy two non-overlapping 80 MHz frequency bandwidths.

[0181] It should be noted that the second information can be transmitted not only through the first trigger frame but also through the target wake time (TWT). In other words, the working bandwidth switched by the first STA can be indicated not only by the first trigger frame but also by the TWT mechanism. For example, before the first AP and the first STA transmit, a request-response negotiation can be performed to enable the first STA to switch its bandwidth to the non-cooperative bandwidth.

[0182] The present application is described in detail below in conjunction with Examples 1 to 3.

[0183] Example 1

[0184] FIG14 is an example diagram of the transmission process provided in Example 1.

[0185] In Example 1, the shared AP is the first AP. STA2, STA3, and STA4 are all STAs associated with the first AP. Any of STA2, STA3, and STA4 can be the first STA. The associated AIDs of STAs 2, 3, and 4 are 2, 3, and 4, respectively, and the operating bandwidth is 80 MHz.

[0186] The shared APs compete to obtain a 160 MHz channel, wherein the 80 MHz primary channel (P80) is used for multi-AP collaborative transmission, and the 80 MHz secondary channel (S80) is used for single AP first transmission mode transmission.

[0187] The shared AP indicates in the multi-AP trigger frame the relevant information of the associated non-AP STAs participating in the single AP first transmission mode transmission. The shared AP sets the values ​​of the fields in the multi-AP trigger frame as follows.

[0188] The DL BW field in the common information field is set to 11, and the downlink bandwidth extension field in the special user information field is set to 01, indicating that the bandwidth of the PPDU to be transmitted next is 160 MHz.

[0189] The multi-AP trigger frame may include three UHR variant user information fields corresponding to STA2, STA3, and STA4, thereby indicating that the shared AP will transmit in single AP first transmission mode with STA2, STA3, and STA4. The settings of these three UHR variant user information fields are as follows.

[0190] First UHR variant user information field: The AID 12 field is set to 2, the RU allocation field is set to 11000011, the PS160 field is set to 0, and the remaining fields are reserved. The first UHR variant user information field indicates that the RU or MRU of non-AP STA 1 participating in the single AP first transmission mode transmission is S80.

[0191] Second UHR variant user information field: The AID 12 field is set to 3, the RU allocation field is set to 11000011, the PS160 field is set to 0, and the remaining fields are reserved. The second UHR variant user information field indicates that the RU or MRU of non-AP STA 2 participating in the single-AP first transmission mode transmission is S80.

[0192] The third UHR variant user information field: The AID 12 field is set to 4, the RU allocation field is set to 11000011, the PS160 field is set to 0, and the remaining fields are reserved. The second UHR variant user information field indicates that the RU or MRU of non-AP STA 3 participating in the single AP first transmission mode transmission is S80.

[0193] A shared AP also requires MAC frame padding for multi-AP trigger frames. Non-AP STAs 2, 3, and 4 specify the ChannelSwitchDelay field as 32us, 32us, and 64us, respectively, in the UHR Capabilities element of their transmitted Probe Request frames, Association Request frames, or Reassociation Request frames. The MAC frame padding duration for multi-AP trigger frames is 64us.

[0194] Non-AP STAs 2, 3, and 4 parse the user information field that matches their AIDs and determine that the RU or MRU for single-AP first transmission mode transmission is S80. Based on this, non-AP STAs 2, 3, and 4 switch their operating channels to S80 and, after the frame exchange sequence ends, switch back to the primary channel.

[0195] The shared AP indicates relevant information of the backup shared AP participating in the multi-AP cooperative transmission in the multi-AP trigger frame.

[0196] When performing multi-AP cooperative transmission and single-AP transmission in the first transmission mode, there are two possibilities: 1) The sharing AP participates in both multi-AP cooperative transmission and single-AP transmission in the first transmission mode, with one or more shared APs participating in the multi-AP cooperative transmission; 2) The sharing AP participates only in the single-AP transmission mode, with multiple shared APs participating in the multi-AP cooperative transmission. The following describes the first possibility in Example 2, and the second possibility in Example 3.

[0197] Example 2

[0198] Figure 15A is a diagram illustrating an example scenario applicable to embodiment 2. In Figure 15A , the sharing AP may be a first AP, the shared AP1 or the shared AP2 may be a second AP, and STA2, STA3, or STA4 may be a first STA.

[0199] As shown in Figure 15A, the shared AP, shared APs 1, and shared APs 2 form a multi-cooperation set (also called a virtual BSS (VBSS)). The service target of the multi-cooperation set is STA 1. The shared AP and its associated non-AP STAs 2, 3, and 4 form a single-AP BSS.

[0200] As shown in Figure 15B, since the operating bandwidth of shared APs 1 and 2 is 80 MHz and overlaps with the lower 80 MHz of the shared AP, the shared AP uses the lower 80 MHz for multi-AP collaborative transmission, i.e., the lower 80 MHz is the first bandwidth. Furthermore, the shared AP does not participate in collaborative transmission. The upper 80 MHz is used for single-AP transmission in the first transmission mode, i.e., the upper 80 MHz is the second bandwidth. In this case, the lower 80 MHz is also the primary channel (because each AP exchanges control signaling on the primary channel, the overlapping portion must include their respective primary channels).

[0201] As shown in Figure 15C, when hybrid transmission is performed, the shared AP first sends a multi-AP trigger frame, indicating that the PPDU bandwidth to be transmitted next is 160MHz, and the multi-AP collaborative transmission type is joint transmission. Among them, the RU or MRU in the User Info field of the shared AP 1 and the shared AP 2 identified by the AID 12 field are both indicated as the primary 80MHz; the RU or MRU in the User Info field of STAs 2, 3, and 4 identified by the AID 12 field are both indicated as the secondary 80MHz.

[0202] As shown in Figure 15C , shared AP 1 and shared AP 2 send a jointly transmitted UHR MU PPDU for STA 1 on the primary 80 MHz band, with shared AP 1 using spatial streams i_ss = 1 and i_ss = 2, and shared AP 2 using spatial streams i_ss = 3 and i_ss = 4. The shared AP sends UHR MU PPDUs using the first transmission mode for its associated STAs 2, 3, and 4 on the secondary 80 MHz band.

[0203] STA 1 receives a UHR PPDU transmitted jointly from shared AP 1 and shared AP 2. After successfully decoding the PPDU, it responds with a BA frame to its associated AP after a SIFS interval. STAs 2, 3, and 4 switch their operating bandwidth to the secondary 80 MHz and receive UHR PPDUs transmitted in the first transmission mode from the shared AP. After successfully decoding the PPDU, they respond with a BA frame after a SIFS interval.

[0204] Example 3

[0205] Fig. 16A is a diagram illustrating a scenario used in embodiment 3. In Fig. 16A , the sharing AP may be a first AP, the shared AP1 or the shared AP2 may be a second AP, and the STA2 or STA3 may be a first STA.

[0206] As shown in FIG16A , the sharing AP and shared APs 1 and 2 form a multi-AP cooperative set (also called VBSS), serving STA1; the sharing AP and its associated non-AP STAs 2 and 3 form a single-AP BSS.

[0207] As shown in Figure 16B, since the operating bandwidth of shared APs 1 and 2 is 80 MHz, which overlaps with the lower 80 MHz bandwidth of the shared AP, the shared AP uses the lower 80 MHz bandwidth for multi-AP collaborative transmission, i.e., the lower 80 MHz bandwidth is the first bandwidth. Furthermore, the shared AP participates in the collaborative transmission. The upper 80 MHz bandwidth is used for single-AP transmission in the first transmission mode, i.e., the upper 80 MHz bandwidth is the second bandwidth. In this case, the lower 80 MHz bandwidth is also the primary channel.

[0208] As shown in Figure 16C, when hybrid transmission is performed, the shared AP first sends a multi-AP trigger frame, indicating that the PPDU bandwidth to be transmitted next is 160MHz, and the multi-AP collaborative transmission type is joint transmission. Among them, the RU or MRU in the User Info field of the shared AP 1 and the shared AP 2 identified by the AID 12 field are both indicated as the main 80MHz; the RU or MRU in the User Info field of STA 2 and 3 identified by the AID 12 field are both indicated as the auxiliary 80MHz.

[0209] As shown in Figure 16C , the shared AP, shared AP 1, and shared AP 2 transmit a coordinated UHR MU PPDU for STA 1 over the primary 80 MHz band. The shared AP transmits the UHR MU PPDU using spatial stream i_ss = 1, shared AP 1 transmits the UHR MU PPDU using spatial streams i_ss = 2 and i_ss = 3, and shared AP 2 transmits the UHR MU PPDU using spatial stream i_ss = 4. The shared AP transmits the EHT MU PPDU for its associated STAs 2 and 3 over the secondary 80 MHz band. The EHT MU PPDU and UHR MU PPDU transmitted by the shared AP form a frequency-aggregated FA-PPDU, which enables orthogonal alignment at the OFDM symbol level.

[0210] STA 1 receives a UHR MU PPDU transmitted jointly from the shared AP, shared AP 1, and shared AP 2. After successfully decoding the PPDU, STA 1 responds with a BA frame to its associated AP after a SIFS interval. STAs 2 and 3 switch their operating bandwidth to the secondary 80 MHz and receive an EHT MU PPDU transmitted in the first transmission mode from the shared AP. After successfully decoding the PPDU, STAs 2 and 3 respond with a BA frame after a SIFS interval.

[0211] 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.

[0212] Figure 17 is a schematic structural diagram of a communication device 1700 provided in an embodiment of the present application. Communication device 1700 is a first AP. Communication device 1700 may include a transmitting unit 1710. Transmitting unit 1710 is configured to transmit a first trigger frame; the first trigger frame includes first information and second information, the first information being used to instruct the second AP to perform multi-AP collaborative transmission at a first bandwidth, and the second information being used to instruct the first STA to communicate with the first AP at a second bandwidth, both of which are the operating bandwidth of the first AP.

[0213] In some embodiments, the first trigger frame is a multi-AP trigger frame.

[0214] In some embodiments, the first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

[0215] In some embodiments, the third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

[0216] In some embodiments, the first information or the second information is carried in a first field, and the first field includes a device identification field. When the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, when the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

[0217] In some embodiments, the first field comprises a variant user information field and the device identification field comprises an AID12 field.

[0218] In some embodiments, the information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

[0219] In some embodiments, the information of the first bandwidth includes the RU or MRU corresponding to the first bandwidth; the information of the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

[0220] In some embodiments, the communication device 1700 is further used to: receive fourth information; wherein the fourth information is used to indicate a first duration, and the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

[0221] In some embodiments, the fourth information is carried in a capability element.

[0222] In some embodiments, the communication device 1700 is further configured to: fill the first trigger frame according to the first duration.

[0223] In some embodiments, the first STA is one of multiple STAs. When the first AP communicates with the multiple STAs at a second bandwidth, the first AP fills the first trigger frame according to the first duration, including: the first AP fills the first trigger frame according to the second duration, and the second duration is determined according to the time required for the multiple STAs to switch the working channels to the second bandwidth.

[0224] In some embodiments, the second duration is a maximum value of the times required for multiple STAs to switch the operating channels to the second bandwidth.

[0225] In some embodiments, the communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

[0226] In an optional embodiment, the sending unit 1710 may be a transceiver 1930. The communication device 1700 may further include a processor 1910 and a memory 1920, as specifically shown in FIG19 .

[0227] FIG18 is a schematic structural diagram of a communication device 1800 provided in accordance with an embodiment of the present application. The communication device 1800 may be a first device and may include a receiving unit 1810 .

[0228] The receiving unit 1810 is used to receive a first trigger frame sent by a first access point AP; wherein the first device includes a second AP and / or a first STA, the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

[0229] In some embodiments, the first trigger frame is a multi-AP trigger frame.

[0230] In some embodiments, the first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

[0231] In some embodiments, the third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

[0232] In some embodiments, the first information or the second information is carried in a first field, and the first field includes a device identification field. When the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, when the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

[0233] In some embodiments, the first field comprises a variant user information field and the device identification field comprises an AID12 field.

[0234] In some embodiments, the information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

[0235] In some embodiments, the information of the first bandwidth includes the RU or MRU corresponding to the first bandwidth; the information of the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

[0236] In some embodiments, the first device includes a first STA, and the communication device is further used to: send fourth information to the first AP; wherein the fourth information is used to indicate a first duration, and the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

[0237] In some embodiments, the fourth information is carried in a capability element.

[0238] In some embodiments, the communication device is further configured to: switch the working channel to a second bandwidth.

[0239] In some embodiments, the communication device 1800 is further configured to: in response to the completion of the frame interaction sequence between the first STA and the first AP, switch the working channel back to the primary channel of the first STA.

[0240] In some embodiments, the communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

[0241] In an optional embodiment, the receiving unit 1810 may be a transceiver 1930. The communication device 1800 may further include a processor 1910 and a memory 1920, as specifically shown in FIG19 .

[0242] Figure 19 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 19 indicate that the unit or module is optional. Device 1900 may be used to implement the method described in the above method embodiment. Device 1900 may be a chip, a terminal device, or a network device.

[0243] The device 1900 may include one or more processors 1910. The processor 1910 may support the device 1900 to implement the method described in the above method embodiment. The processor 1910 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.

[0244] The apparatus 1900 may further include one or more memories 1920. The memories 1920 store programs that can be executed by the processor 1910, causing the processor 1910 to perform the methods described in the above method embodiments. The memories 1920 may be independent of the processor 1910 or integrated into the processor 1910.

[0245] The apparatus 1900 may further include a transceiver 1930. The processor 1910 may communicate with other devices or chips via the transceiver 1930. For example, the processor 1910 may transmit and receive data with other devices or chips via the transceiver 1930.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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."

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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)).

[0261] 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: The method comprises: The first access point AP sends a first trigger frame; Among them, the first trigger frame includes first information and second information, the first information is used to indicate the second AP to perform multi-AP collaborative transmission in the first bandwidth, and the second information is used to indicate the first station STA to communicate with the first AP on the second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

2. The method according to claim 1, characterized in that: The first trigger frame is a multi-AP trigger frame.

3. The method according to claim 1 or 2, characterized in that: The first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

4. The method according to claim 3, characterized in that The third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

5. The method according to any one of claims 1 to 4, characterized in that The first information or the second information is carried in a first field, wherein the first field includes a device identification field. In a case where the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, In a case where the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

6. The method according to claim 5, characterized in that The first field includes a variant user information field, and the device identification field includes an AID12 field.

7. The method according to any one of claims 1 to 6, characterized in that The information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

8. The method according to claim 7, characterized in that The information of the first bandwidth includes a resource unit RU or multiple resource units MRU corresponding to the first bandwidth; The information about the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: The first AP receives fourth information; The fourth information is used to indicate a first duration, where the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

10. The method according to claim 9, characterized in that The fourth information is carried in the capability element.

11. The method according to claim 9 or 10, characterized in that: The method further comprises: The first AP fills the first trigger frame according to the first duration.

12. The method according to claim 11, characterized in that The first STA is one of a plurality of STAs, and when the first AP communicates with the plurality of STAs at the second bandwidth, the first AP filling the first trigger frame according to the first duration includes: The first AP fills the first trigger frame according to a second duration, and the second duration is determined according to the time required for the multiple STAs to switch the working channels to the second bandwidth.

13. The method according to claim 12, characterized in that The second duration is the maximum value of the time required for the multiple STAs to switch the working channels to the second bandwidth.

14. The method according to any one of claims 1 to 13, characterized in that The communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

15. A wireless communication method, characterized in that: The method comprises: The first device receives a first trigger frame sent by a first access point AP; Among them, the first device includes a second AP and / or a first station STA, the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

16. The method according to claim 15, characterized in that The first trigger frame is a multi-AP trigger frame.

17. The method according to claim 15 or 16, characterized in that The first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

18. The method according to claim 17, characterized in that The third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

19. The method according to any one of claims 15 to 18, characterized in that The first information or the second information is carried in a first field, wherein the first field includes a device identification field. In a case where the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, In a case where the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

20. The method according to claim 19, characterized in that The first field includes a variant user information field, and the device identification field includes an AID12 field.

21. The method according to any one of claims 15 to 20, characterized in that The information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

22. The method according to claim 21, characterized in that The information of the first bandwidth includes a resource unit RU or multiple resource units MRU corresponding to the first bandwidth; The information about the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

23. The method according to any one of claims 15 to 22, characterized in that The first device includes the first STA, and the method further includes: The first STA sends fourth information to the first AP; The fourth information is used to indicate a first duration, where the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

24. The method according to claim 23, characterized in that The fourth information is carried in the capability element.

25. The method according to claim 23 or 24, characterized in that The method further comprises: The first STA switches a working channel to the second bandwidth.

26. The method according to claim 25, characterized in that The method further comprises: In response to the completion of the frame interaction sequence between the first STA and the first AP, the first STA switches the working channel back to the primary channel of the first STA.

27. The method according to any one of claims 15 to 26, characterized in that The communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

28. A communication device, characterized in that: The communication device is a first access point AP, and the communication device includes: A sending unit, configured to send a first trigger frame; Among them, the first trigger frame includes first information and second information, the first information is used to indicate the second AP to perform multi-AP collaborative transmission in the first bandwidth, and the second information is used to indicate the first station STA to communicate with the first AP on the second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

29. The communication device according to claim 28, characterized in that The first trigger frame is a multi-AP trigger frame.

30. The communication device according to claim 28 or 29, characterized in that: The first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

31. The communication device according to claim 30, characterized in that The third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

32. The communication device according to any one of claims 28 to 31, characterized in that: The first information or the second information is carried in a first field, wherein the first field includes a device identification field. In a case where the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, In a case where the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

33. The communication device according to claim 32, characterized in that The first field includes a variant user information field, and the device identification field includes an AID12 field.

34. The communication device according to any one of claims 28 to 33, characterized in that: The information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

35. The communication device according to claim 34, characterized in that The information of the first bandwidth includes a resource unit RU or multiple resource units MRU corresponding to the first bandwidth; The information about the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

36. The communication device according to any one of claims 28 to 35, characterized in that: The communication device is also used for: receiving fourth information; The fourth information is used to indicate a first duration, where the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

37. The communication device according to claim 36, characterized in that The fourth information is carried in the capability element.

38. The communication device according to claim 36 or 37, characterized in that: The communication device is also used for: Fill the first trigger frame according to the first duration.

39. The communication device according to claim 38, characterized in that The first STA is one of a plurality of STAs, and when the first AP communicates with the plurality of STAs at the second bandwidth, the first AP filling the first trigger frame according to the first duration includes: The first AP fills the first trigger frame according to a second duration, and the second duration is determined according to the time required for the multiple STAs to switch the working channels to the second bandwidth.

40. The communication device according to claim 39, characterized in that The second duration is the maximum value of the time required for the multiple STAs to switch the working channels to the second bandwidth.

41. The communication device according to any one of claims 28 to 40, characterized in that: The communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

42. A communication device, characterized in that: The communication device is a first device, and the communication device includes: A receiving unit, configured to receive a first trigger frame sent by a first access point AP; Among them, the first device includes a second AP and / or a first station STA, the first trigger frame includes first information and second information, the first information is used to instruct the second AP to perform multi-AP collaborative transmission in a first bandwidth, and the second information is used to instruct the first STA to communicate with the first AP on a second bandwidth, and the first bandwidth and the second bandwidth both belong to the working bandwidth of the first AP.

43. The communication device according to claim 42, characterized in that The first trigger frame is a multi-AP trigger frame.

44. The communication device according to claim 42 or 43, characterized in that The first trigger frame further includes third information, where the third information is used to indicate the sum of the first bandwidth and the second bandwidth.

45. The communication device according to claim 44, characterized in that The third information is carried in the downlink bandwidth field of the common information field and the downlink bandwidth extension field of the special user information field.

46. ​​The communication device according to any one of claims 42 to 45, characterized in that: The first information or the second information is carried in a first field, wherein the first field includes a device identification field. In a case where the value of the device identification field belongs to the identification range of the AP, the first field carries the first information; or, In a case where the value of the device identification field belongs to the identification range of the STA, the first field carries the second information.

47. The communication device according to claim 46, characterized in that The first field includes a variant user information field, and the device identification field includes an AID12 field.

48. The communication device according to any one of claims 42 to 47, characterized in that: The information of the first bandwidth or the information of the second bandwidth is carried in one or more of the following fields: the resource unit allocation field of the variant user information field, the PS160 field of the variant user information field, the downlink bandwidth field of the common information field, and the downlink bandwidth extension field of the special user information field.

49. The communication device according to claim 48, characterized in that The information of the first bandwidth includes a resource unit RU or multiple resource units MRU corresponding to the first bandwidth; The information about the second bandwidth includes the RU or MRU corresponding to the second bandwidth.

50. The communication device according to any one of claims 42 to 49, characterized in that: The first device includes the first STA, and the communication device is further used for: Sending fourth information to the first AP; The fourth information is used to indicate a first duration, where the first duration is the time required for the first STA to switch the working channel to the second bandwidth.

51. The communication device according to claim 50, characterized in that The fourth information is carried in the capability element.

52. The communication device according to claim 50 or 51, characterized in that: The communication device is also used for: The operating channel is switched to the second bandwidth.

53. The communication device according to claim 52, characterized in that The communication device is also used for: In response to the completion of the frame interaction sequence between the first STA and the first AP, the working channel is switched back to the primary channel of the first STA.

54. The communication device according to any one of claims 42 to 53, characterized in that: The communication between the first STA and the first AP is a first transmission mode, and the first transmission mode includes one or more of the following: single-user transmission, multi-user multiple-input and multiple-output transmission, orthogonal frequency division multiple access transmission, and non-orthogonal frequency division multiple access transmission.

55. A communication device, characterized in that: The device comprises 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 so that the communication device executes the method according to any one of claims 1 to 27.

56. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 27.

57. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 27.

58. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 27.

59. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 27.

60. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 27.

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