Wireless communication methods and communication devices

Abstract

Provided are wireless communication methods and communication devices. A wireless communication method comprises: a first AP sending first information to a first STA, the first information comprising a first operating parameter, wherein the first operating parameter is a sub-channel or sub-band operating parameter used by the first STA within a first predetermined service period. In the present application, a first AP can indicate, by means of first information, a sub-channel or sub-band operating parameter within a first predetermined service period to a first STA; and on the basis of the sub-channel or sub-band operating parameter, the first STA can determine a sub-channel or sub-band used within the first predetermined service period, such that the switching to a secondary channel can be performed when a primary channel cannot be used, thereby helping to ensure the timely transmission of a low-latency service.

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 communication device. Background Art

[0002] Reducing latency is a key goal in some communication systems. This is particularly important for low-latency traffic. However, during certain service periods (such as restricted target wake time (R-TWT) periods), when a station (STA) cannot use the primary channel, the STA cannot guarantee timely transmission of its low-latency services.

[0003] Summary of the Invention

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

[0005] In a first aspect, a wireless communication method is provided, including: a first access point (AP) sends first information to a first STA, the first information including a first operating parameter, which is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

[0006] In a second aspect, a wireless communication method is provided, including: a first STA receives first information sent by a first AP, the first information includes a first operating parameter, and the first operating parameter is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

[0007] According to a third aspect, a communication device is provided, which is a first AP and includes: a sending module for sending first information to a first STA, wherein the first information includes a first operating parameter, and the first operating parameter is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

[0008] In a fourth aspect, a communication device is provided, which is a first STA: a receiving module is used to receive first information sent by a first AP, the first information includes a first operating parameter, and the first operating parameter is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

[0009] In a fifth aspect, a communication device is provided, comprising 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 described in the first aspect.

[0010] In a sixth aspect, a communication device is provided, comprising 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 described in the second aspect.

[0011] In a seventh aspect, a device is provided, comprising a processor for calling a program from a memory so that the device executes the method as described in the first aspect or the second aspect.

[0012] In an eighth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.

[0013] In a ninth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0015] In an eleventh aspect, a computer program is provided, wherein the computer program enables a computer to execute the method as described in the first aspect or the second aspect.

[0016] In the present application, the first AP may indicate the subchannel or subband operating parameters of the first predetermined service period to the first STA via the first information. Based on the subchannel or subband operating parameters, the first STA may determine the subchannel or subband to be used during the first predetermined service period, thereby enabling switching to the secondary channel when the primary channel is unavailable, thereby ensuring timely transmission of low-latency services. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 1A and 1B are schematic structural diagrams of wireless communication systems applicable to embodiments of the present application.

[0018] FIG2 is a diagram showing an example of the HE SST process.

[0019] FIG3 is a diagram showing an example of the DSO process.

[0020] FIG4 is a diagram illustrating an example of a secondary channel access process.

[0021] FIG5 is a diagram showing an example of a process of trigger-enabled R-TWT.

[0022] FIG6 is a diagram showing an example of a non-trigger-enabled R-TWT process.

[0023] FIG7 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0024] FIG8 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0025] FIG9 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0026] FIG10 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0027] FIG11 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0028] FIG12 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0029] FIG13 is a schematic flowchart of a wireless communication method provided in another embodiment of the present application.

[0030] FIG14 is a schematic structural diagram of a TWT element provided in an embodiment of the present application.

[0031] FIG15 is a schematic structural diagram of a TWT element provided in another embodiment of the present application.

[0032] FIG16 is a schematic structural diagram of a TWT element provided in another embodiment of the present application.

[0033] FIG17 is a schematic diagram of the structure of the EHT operation element provided in an embodiment of the present application.

[0034] FIG18 is a schematic diagram of the structure of the EHT capability element provided in an embodiment of the present application.

[0035] FIG19 is a schematic diagram of the workflow of the AP opening DSO interaction sequence.

[0036] FIG20 is a schematic diagram of the workflow of STA entering the DSO interaction sequence.

[0037] Figure 21 is a schematic flow chart of the DSO R-TWT process provided in Example 1 of the present application.

[0038] Figure 22 is a schematic flow chart of the DSO R-TWT process provided in Example 2 of the present application.

[0039] Figure 23 is a schematic flow chart of the DSO R-TWT process provided in Example 3 of the present application.

[0040] Figure 24 is a schematic flow chart of the DSO R-TWT process provided in Example 4 of the present application.

[0041] Figure 25 is a schematic flow chart of the DSO R-TWT process provided in Example 5 of the present application.

[0042] Figure 26 is a schematic flow chart of the DSO R-TWT process provided in Example 6 of the present application.

[0043] Figure 27 is a schematic flow chart of the DSO R-TWT process provided in Example 7 of the present application.

[0044] Figure 28 is a schematic flow chart of the DSO R-TWT process provided in Example 8 of the present application.

[0045] Figure 29 is a schematic flow chart of the DSO R-TWT process provided in Example 9 of the present application.

[0046] Figure 30 is a schematic flow chart of the DSO R-TWT process provided in Example 10 of the present application.

[0047] Figure 31 is a schematic flow chart of the DSO R-TWT process provided in Example 11 of the present application.

[0048] Figure 32 is a schematic flow chart of the DSO R-TWT process provided in Example 12 of the present application.

[0049] Figure 33 is a schematic flow chart of the DSO R-TWT process provided in Example 13 of the present application.

[0050] Figure 34 is a schematic flow chart of the DSO R-TWT process provided in Example 14 of the present application.

[0051] Figure 35 is a schematic flow chart of the DSO R-TWT process provided in Example 15 of the present application.

[0052] Figure 36 is a schematic flow chart of the DSO R-TWT process provided in Example 16 of the present application.

[0053] Figure 37 is a schematic flow chart of the DSO R-TWT process provided in Example 17 of the present application.

[0054] Figure 38 is a schematic flow chart of the DSO R-TWT process provided in Example 18 of the present application.

[0055] Figure 39 is a schematic flow chart of the DSO R-TWT process provided in Example 20 of the present application.

[0056] Figure 40 is a structural diagram of a communication device provided in an embodiment of the present application.

[0057] Figure 41 is a structural diagram of a communication device provided in another embodiment of the present application.

[0058] Figure 42 is a structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The technical solution in this application will be described below with reference to the accompanying drawings.

[0060] Communication System

[0061] 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 (Wi-Fi), high-performance radio local area networks (HIPELAN), wide area networks (WAN), cellular networks, or other communication systems. For another example, the technical solutions provided in the embodiments of the present application can be applied to communication systems that adopt the 802.11 standard. For example, the 802.11 standard includes but is not limited to the 802.11ax standard, the 802.11be standard, the 802.11bn standard, and the next generation 802.11 standard.

[0062] 1A and 1B show schematic diagrams of communication systems applicable to embodiments of the present application. Referring to FIG1A , the communication devices in the communication system 100 may include access points (APs) 111 and 112, as well as STAs 121 and 122, wherein STA 121 can access the network through AP 111, and STA 122 can access the network through AP 112. Referring to FIG1B , the communication devices in the communication system 100 may include access points AP 111 and 112, as well as STAs 121, 122, and 123, wherein STA 121 and 122 can access the network through AP 111, and STA 123 can access the network through AP 112.

[0063] In some implementations, a STA may establish an association with an AP, after which the associated STA and AP may communicate. Referring to FIG. 1A , AP 111 and STA 121 may communicate after establishing an association, and AP 112 and STA 122 may communicate after establishing an association.

[0064] In some implementations, the communication in the communication system 100 may be communication between an AP and a non-AP STA, communication between a non-AP STA and a non-AP STA, or communication between a STA and a peer STA, where a peer STA may refer to a device that communicates with the STA peer, for example, the peer STA may be an AP or a non-AP STA.

[0065] It should be understood that Figures 1A and 1B exemplarily show two AP STAs and several non-AP STAs. The communication system 100 may also include a larger number of AP STAs, or the communication system 100 may include other numbers of non-AP STAs. The embodiments of the present application are not limited to this.

[0066] In addition, the above communication system can be applied to scenarios of multi-device collaboration, such as multi-AP (multiple access points, Multi-AP) collaboration, or multi-site collaboration.

[0067] In the embodiments of this application, the names of AP and / or STA are not limited. In some scenarios, AP can also be called AP STA, that is, in a sense, AP is also a type of STA. In other scenarios, STA can also be called non-AP STA.

[0068] In some scenarios, the aforementioned communication device may also be a "multi-link device (MLD)," meaning a device that can communicate via multiple communication links. These multiple communication links may include communication links in different frequency bands, such as millimeter wave bands and / or low-frequency bands. Generally, if a multi-link device is an AP, the AP is also referred to as a "multi-link AP." If a multi-link device is a STA, the STA is also referred to as a "multi-link STA."

[0069] In the embodiment of the present application, the AP may be an access point device in a wireless network.

[0070] In some implementations, the role of a STA in a communication system is not absolute; in some scenarios, a STA can function as an AP. For example, when a mobile phone is connected to a router, it can be a non-AP STA, while when it is acting as a hotspot for other phones, it functions as an AP.

[0071] In the embodiments of the present application, a STA in the embodiments of the present application may be a device with wireless transceiver capabilities, such as a device that supports the 802.11 series of protocols and can communicate with an AP or other STAs. For example, a STA is any user communication device that allows a user to communicate with an AP and, in turn, with a WLAN. Examples of STAs include user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.

[0072] The STA in the embodiment of the present application may also be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. Examples include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or future-evolved public land mobile communication networks. The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0073] In addition, the AP device in the embodiment of the present application may be a device for communicating with a STA. The AP device may be a network device in a wireless local area network. The AP device may be used to communicate with the STA through the wireless local area network.

[0074] From the perspective of the communication standards supported by the AP, in some implementations, the AP can be a device that supports the 802.11be standard. The AP can also be a device that supports various current and future 802.11 family WLAN standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0075] From the perspective of STA-supported communication standards, in some implementations, non-AP STAs can support the 802.11be standard. Non-AP STAs can also support various current and future 802.11 family wireless local area network (WLAN) standards, including 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0076] In the embodiments of the present application, there is no limitation on the frequency bands supported by WLAN technology. In some implementations, the frequency bands supported by WLAN technology may include, but are not limited to, low frequency bands (e.g., 2.4 GHz, 5 GHz, 6 GHz) and high frequency bands (e.g., 45 GHz, 60 GHz).

[0077] It should be understood that the specific forms of STA and AP devices in the embodiments of the present application are not particularly limited and are merely illustrative.

[0078] Channel Constraints

[0079] With the rapid development of wireless network technology, the demand for throughput and latency in wireless communications is increasing, and the bandwidth supported by the Wi-Fi standard has now reached 320 megahertz (MHz). However, the rules set in the current standard impose the following constraints on 802.11 transmissions of various bandwidths (20 / 40 / 80 / 160 / 320MHz): the primary 20MHz channel must be idle before STAs can access large-bandwidth channels (>20MHz); if the primary channel is busy, such as when it is interfered with by overlapping basic service sets (OBSS), the STA cannot transmit on any idle secondary channels. For example, in the communication system scenario shown in Figure 1B, AP111 has coverage of basic service set (BSS) 1, and AP112 has coverage of BSS2, with BSS1 and BSS2 overlapping. Therefore, STA122 is within the OBSS range, while AP111 is not. AP111 has already completed R-TWT negotiation with STA121. However, STA122 is now unable to use the primary channel due to OBSS interference on the primary channel and is therefore unable to transmit data within its R-TWT SP. This limitation leads to severe spectrum underutilization, particularly for high-bandwidth channel access, significantly reducing resource utilization. Furthermore, when device-supported bandwidths do not match, especially when the AP interacts with STAs with smaller bandwidths, the AP's bandwidth capacity is wasted.

[0080] High efficiency (HE) subchannel selective transmission (SST)

[0081] In order to allow STAs with small bandwidth to participate in large-bandwidth orthogonal frequency division multiple access (OFDMA) transmission, that is, to address the problem of mismatched bandwidth capabilities between APs and STAs, the relevant technology proposes an SST operation for the trigger-enabled TWT agreement based on an individual target wake time (TWT) in HE. For example, the operation of HE SST can be shown in Figure 2, where STA2 has established an individual TWT with AP1, and the service periods (SP) of STA1 and STA2 overlap, P20 represents the primary 20MHz channel, and S20 represents the secondary 20MHz channel.

[0082] In HE SST, non-AP STA and HE SST AP establish SST operation by negotiating individual trigger-enabled TWT, and use the TWT channel field in the TWT element in the TWT request (req.) / response (resp.) to indicate the negotiated sub-channel. Within SPs, the HE SST AP allocates individually addressed resource units (RUs) that are addressed to the HE SST non-AP STA within the sub-channel indicated in the TWT channel field of the TWT response. At the start of TWT, the HE SST non-AP STA may use the sub-channel indicated by the negotiated TWT channel field. When the operating channel or channel bandwidth of the AP changes, or any sub-channel of the triggered TWT is no longer within the new operating channel or channel bandwidth, the trigger-enabled TWT terminates and the SST is destroyed.

[0083] As shown in Figure 2, STA1 sends a TWT req. to AP1 on the primary channel P20. The TWT req. may carry an SST request. After a short interframe space (SIFS), AP1 sends a TWT resp. to STA1 in response to STA1's request. The TWT resp. may carry the negotiated secondary channel. After STA1 completes its interaction with the AP, it enters the doze state, then wakes up at a specified time to receive AP1's beacon frame, and then enters the doze state again until the SP assigned to STA1 by AP1 arrives. Before the SP for STA1 arrives, STA1 can switch to the previously negotiated channel before the TWT SP begins. During the TWT SP, STA1 can send a clear to send (CTS) frame to AP1 on the secondary channel S20. STA1 and AP1 can then exchange uplink (UL) or downlink (DL) data via OFDAM. When the TWT SP ends, STA1 can return to the primary channel P20 again.

[0084] The first limitation of SST is its static channel switching method (SP-based channel switching). This channel switching mode requires STAs to remain on secondary channels within the entire SP, which is inflexible. Furthermore, SPs are periodic, but OBSS interference is not necessarily periodic. Therefore, the gain achieved by static switching is not necessarily higher than that achieved by using only the primary channel. Second, HE SST only allows 80MHz STAs to operate on secondary 80MHz channels within a 160MHz operating bandwidth, or allows 20MHz STAs to operate outside the wider primary 20MHz operating bandwidth. For standards such as 11be and 11bn, which have increased Wi-Fi bandwidth to 320MHz, SST may not be able to scale well and implement the operation of scheduling 160MHz STAs on secondary 160MHz channels.

[0085] Dynamic subband / subchannel operation (DSO)

[0086] To address the capability mismatch between APs and non-APs with smaller bandwidth, the related art proposes Distributed Switching (DSO) operations. Unlike SST, where STAs initiate requests to switch to secondary channels, DSO is a scheduling operation controlled by the AP.

[0087] For example, the DSO operation can be shown in Figure 3. The DSO operation allows a 320MHz AP to dynamically indicate a 160MHz non-AP's receive (Tx) / transmit (Rx) opportunity on the secondary 160MHz (160S) (which can be extended to any AP / non-AP bandwidth combination where the AP supports a higher bandwidth than the non-AP). Specifically, at the beginning of any 320MHz bandwidth transmission opportunity (TXOP), the AP sends an indication to the DSO-supported non-AP, requesting the non-AP to switch to the secondary 160MHz within this TXOP and then continue frame exchange on the secondary 160MHz. At the end of the TXOP, the DSO non-AP switches back to operating on the primary 160MHz (160P). For example, when a STA does not detect data within SIFS+δ (delta) time, it can be considered that the TXOP has ended. The specific value of delta depends on the specific implementation.

[0088] While DSO can address the shortcomings of SST to some extent, its use of control frames (MU-RTS / buffer status report poll (BSRP)) to schedule STAs to switch to secondary channels introduces significant latency overhead. This is because STAs only switch channels after receiving a subband-switch control frame. During the channel switch, this frame must be filled until the STA switches to the secondary channel.

[0089] Secondary-channel-access

[0090] Related technologies address the current STA's dependence on the primary 20MHz channel when accessing channels. A method for accessing secondary channels has been proposed. As shown in Figure 4, this method allows the AP and STA to exchange data on the available secondary channel when the primary channel is busy and the secondary channel is available, provided both the AP and STA have a consistent understanding of the primary channel status.

[0091] If the AP's first primary channel (P1) is busy for the network allocation vector (NAV) duration, and the second primary channel (P2) is idle for a to-be-determined duration, the AP backs off and initiates a TXOP to the target STA using a BSRP trigger frame or a request to send (RTS) frame (control frame) on the second primary channel.

[0092] If the STA's first primary channel is busy within the NAV duration, it moves to the second primary channel and waits for the BSRP or RTS (control frame) from the transmitter, and the STA returns to the first primary channel before the NAV of the first primary channel equals 0.

[0093] In Figure 4, the sender is the AP and the receiver is the STA, and their identities can be interchanged.

[0094] Non-primary-channel-utilization-follow-up

[0095] Related technologies address the issue of STAs being unable to use idle secondary channels when the primary channel is busy. A solution is proposed: when one portion of the working bandwidth is detected to be busy, another portion is allowed to be used. This solution also addresses the issue of STAs being unable to use idle secondary channels when the primary channel is busy. The solution also addresses the issue of different capabilities of sender and receiver devices, with no restrictions placed on sender capabilities. The solution also analyzes and discusses two operating modes for receiver capabilities (parallel channel monitoring and sequential channel monitoring).

[0096] When receiver capability type 1 (parallel listening channels) is selected, the device can use the secondary channel during periods not restricted by the primary 20 MHz channel being occupied. Since the receiver can concurrently listen to preambles on other channels, it does not matter whether it knows that the OBSS is on the primary 20 MHz channel.

[0097] When receiver capability type 2 (sequential listening channels) is selected, the sender and receiver are required to have the same understanding of the primary 20 MHz channel occupied by OBSS and any other unavailable channels, based on which devices can use secondary channels when the primary 20 MHz channel is busy. In addition, once the duration determined by the clear channel assessment (CCA) (such as NAV or physical layer protocol data unit (PPDU) length) on the primary 20 MHz channel expires, control must return to the primary 20 MHz channel.

[0098] R-TWT

[0099] R-TWT operation enables the BSS to deliver delay-sensitive traffic using enhanced medium access protection and resource reservation mechanisms. The establishment of R-TWT members uses the same process as used to establish broadcast TWT members, except that the broadcast TWT element carried in the management frame used to establish the members includes one or more restricted TWT parameter set fields. The R-TWT scheduling AP and the R-TWT scheduled STA should set the restricted TWT traffic information field to identify the traffic identifier (TID) of the delay-sensitive traffic carried by the R-TWT member in the DL and UL. The TID specified in the restricted TWT traffic info field of the TWT element in the TWT response indicating the acceptance of TWT is called R-TWT DL TID(s) or R-TWT UL TID(s), collectively referred to as R-TWT TID(s). When the TID to link mapping update results in none of the R-TWT TIDs of the R-TWT members being mapped to the link on which the R-TWT members are set, the corresponding R-TWT members are deemed destroyed. The R-TWT scheduling AP can schedule at most one quiet interval that overlaps with the R-TWT SP. If scheduled, this quiet interval should have a certain duration and should start at the same time as the corresponding R-TWT SP. In order to schedule overlapping quiet intervals of one or more R-TWT SPs belonging to one or more periodic or non-periodic R-TWT schedules, an extremely high throughput (EHT) AP can transmit one or more quiet elements in beacon and probe response frames. This allows other non-member STAs to remain silent and gives member STAs a higher priority to transmit low-latency data during the SP. An operation example of trigger-enabled R-TWT is shown in Figure 5, and an operation example of non-trigger-enabled R-TWT is shown in Figure 6.

[0100] R-TWT technology enables BSS to use enhanced medium access protection and resource reservation mechanisms to better deliver latency-sensitive traffic, and is currently one of the important technologies for ensuring the transmission of low-latency services. However, R-TWT does not currently support channel allocation during negotiation and secondary channel access within the R-TWT SP. Therefore, in certain scenarios where the STA's primary channel is unavailable (such as OBSS interference scenarios), R-TWT technology cannot guarantee the timely transmission of its low-latency services.

[0101] Based on this, the method of the embodiment of the present application is described in detail below with reference to FIG7 .

[0102] As shown in FIG7 , an embodiment of the present application provides a wireless communication method. For ease of understanding, the following uses a first AP and a first STA to represent devices applicable to this method. The first AP can be any of the APs described above, and the first STA can be any of the STAs described above.

[0103] Referring to Figure 7, the wireless communication method of an embodiment of the present application may include step S710. In step S710, the first AP sends first information to the first STA. The first information may include a first operating parameter, and the first operating parameter may be a subchannel or subband operating parameter adopted by the first STA during the first predetermined service period. The subchannel here may be a subchannel constituting the working channel of the first AP and the first STA, such as 16 20MHz subchannels constituting a 320MHz working channel. The subchannel or subband operating parameter can be used to indicate the usage of the subchannel, such as whether the subchannel can be used by the first STA, so the first STA can determine the subchannel or subband that can be used in the first predetermined service period based on the first operating parameter.

[0104] Exemplarily, the first scheduled service period may be the R-TWT SP mentioned above. After the first scheduled service period is established, the first STA may determine the available subchannels or subbands based on the first operating parameters. The establishment of the first scheduled service period here may refer to the establishment of an R-TWT membership relationship (R-TWT membership setup) between the first STA and the first AP. For example, the first information may be used to update the parameters of the R-TWT SP related to the dynamic subband / subchannel operation DSO operation, and the first information may be carried in the R-TWT response message or the R-TWT information frame. For another example, the first information may be used to update the DSO operating parameters within the R-TWT SP, and the first information may be carried in the channel state information CSI frame or data frame within the R-TWT SP. The range of the subchannel or subband indicated by the updated DSO operating parameters is smaller than the range of the subchannel or subband indicated by the parameters of the R-TWT SP.

[0105] In the present application, the first AP may indicate the subchannel or subband operating parameters of the first predetermined service period to the first STA via the first information. Based on the subchannel or subband operating parameters, the first STA may determine the subchannel or subband to be used during the first predetermined service period, thereby enabling switching to the secondary channel when the primary channel is unavailable, thereby ensuring timely transmission of low-latency services.

[0106] The first operating parameter can correspond to dynamic sub-channel or sub-band operation, that is, the first AP can dynamically indicate the first operating parameter, which helps to increase the flexibility of sub-channel usage. For example, when the first scheduled service period is the R-TWT SP mentioned above, the first AP can dynamically indicate the sub-channel or sub-band operating parameters within the SP, so the R-TWT SP is an R-TWT SP with DSO characteristics (for ease of understanding, referred to as "DSO R-TWT SP" below). For example, a 320MHz AP can dynamically indicate a 160MHz non-AP Tx / Rx opportunity on the secondary 160MHz by dynamically indicating the sub-channel or sub-band operating parameters (which can be extended to any AP / non-AP bandwidth combination with a bandwidth higher than that of the non-AP supported by the AP). The first operating parameter can be used to indicate the sub-channel or sub-band that the first AP allows the first STA to use in the first scheduled service period, that is, the sub-channel or sub-band used by the first STA in the first scheduled service period can be determined based on the permission of the first AP, which helps to ensure that the sub-channel operation of the first STA meets the requirements of the first AP.

[0107] As shown in Figure 8, before the first AP sends the first information to the first STA, the wireless communication method according to an embodiment of the present application may further include step S810. In step S810, the first AP receives second information sent by the first STA. The second information may include first feedback information, which may be used to indicate the first STA's feedback information regarding the primary channel and / or the secondary channel. Therefore, based on the first feedback information, the first AP may determine first operating parameters to be sent to the first STA, thereby ensuring that the first operating parameters conform to the operating conditions of the primary channel and / or the secondary channel. Furthermore, the first feedback information may include interference information regarding the primary channel and / or the secondary channel. Exemplarily, the interference information may include interference type information and interference occupancy information. The interference type information may indicate the type of channel interference, such as OBSS interference, Bluetooth interference, or certain periodic interference. The interference occupancy information may indicate the occupancy of the channel interference. For example, when the channel interference type is OBSS interference, the interference occupancy information may indicate the OBSS interference occupancy on the channel. The first AP may determine the first operating parameters based on the interference information regarding the primary channel and / or the secondary channel, thereby reducing the impact of channel interference on data transmission.

[0108] The second information may also include a second operating parameter, which may be used to indicate the subchannel or subband that the first STA desires to use during the first scheduled service period. Therefore, the first AP may also determine the first operating parameter to be sent to the first STA based on the second operating parameter, thereby ensuring that the first operating parameter meets the first STA's expectations. It is noteworthy that the subchannel or subband that the first STA desires to use during the first scheduled service period does not exceed the maximum bandwidth supported by the first STA. For example, when the maximum bandwidth supported by the first STA is 320 MHz, the subchannel or subband that it desires to use does not exceed the range of 16 20 MHz subchannels. If the first AP indicates a channel list to the first STA before establishing the first scheduled service period, the first STA may select the subchannel or subband that it desires to use during the first scheduled service period from the channel list. If the first STA supports the 20 MHz-only operating mode, the first STA may indicate a subchannel or subband that it desires to use during the first scheduled service period.

[0109] The first information may also include first indication information, which may be used to indicate the first AP's recommendation for the first STA to use a channel in the first scheduled service period. That is, in addition to indicating the first operating parameters to the first STA, the first AP may also indicate to the first STA some suggestions for using channels in the first scheduled service period, which may help the first STA to more reasonably select a sub-channel in the first scheduled service period. For example, the first indication information may indicate the first AP's recommendation for the first STA to prioritize the sub-channel in the first scheduled service period. For another example, the first indication information may also indicate the first AP's recommendation for the first STA to select different sub-channels or sub-frequency bands according to different channel conditions (such as channel interference types) in the first scheduled service period.

[0110] The following describes how the first and second information are indicated. This description uses the example of the first information including the first operating parameter and the first indication information, and the second information including the first feedback information and the second operating parameter. It is important to note that the following description does not limit the content of the first and second information. In a specific implementation, the first information may not include the first indication information, and the second information may not include the second operating parameter.

[0111] As an example, a first AP and a first STA may exchange first and second information during a negotiation period for a first scheduled service period. Specifically, the first AP and the first STA may first exchange the first and second information during the negotiation period before initiating the first scheduled service period. For example, during the first scheduled service period, the first STA may wish to change the subchannel or sub-frequency band operating parameters used during the first scheduled service period due to the operating conditions of the primary channel and / or secondary channel. The first STA may then negotiate with the first AP to re-establish the first scheduled service period. In this case, the first STA may inform the first AP of the operating conditions of the primary channel and / or secondary channel and the subchannel or sub-frequency band it desires to use via the second information. Based on the second information, the first AP may inform the first STA of the subchannel or sub-frequency band operating parameters for the first scheduled service period and a recommended channel for use during the first scheduled service period via the first information. This approach helps ensure that the first STA can change the subchannel or sub-frequency band in a timely manner based on the operating conditions of the primary channel and / or secondary channel within the first scheduled service period, thereby ensuring timely service transmission. The following details the exchange of the first and second information during the negotiation period for the first scheduled service period.

[0112] The first information may be carried in a first message, and the first message may be used to respond to a request to establish a first predetermined service period. For example, when the first predetermined service period is R-TWT SP, the first message may be a TWT response corresponding to R-TWT.

[0113] The first message may include a first element, the first element may include a first field, and the first field may be used to carry a first operation parameter. That is, the first operation parameter in the first message may be carried in the first field in the first element of the first message. For example, when the first message is a TWT response corresponding to R-TWT, the first element may be a TWT element in the TWT response, and the first operation parameter may be carried in a subfield of the TWT element.

[0114] The first element may also include a second field, and the second field may be used to carry the first indication information. That is, the first indication information may be carried in the second field of the first element of the first message. For example, when the first element is a TWT element in a TWT response, the first indication information may also be carried in a subfield of the TWT element.

[0115] The first element may also include a third field, and the third field may be used to indicate whether the first field is valid. Therefore, the first STA may determine whether the first field needs to be interpreted based on the third field, which helps to save the resource overhead of the first STA. Furthermore, the third field may also be used to indicate the capability information of the first AP in the first predetermined service period. For example, the third field may indicate the capability of the first AP to perform full channel triggering in the first predetermined service period and / or the capability to interact with the first STA on a sub-channel or sub-band. Based on the third field, the first STA may also determine the switching strategy of the sub-channel or sub-band within the first predetermined service period based on the capability information of the first AP, which helps to improve the accuracy of the switching strategy of the sub-channel or sub-band. Exemplarily, when the first element is a TWT element in a TWT response, the third field may be a subfield of the TWT element.

[0116] The first element may further include a fourth field, which may be used to indicate whether the second field is valid. Therefore, the first STA may determine whether the second field needs to be interpreted based on the fourth field, thereby saving resource overhead of the first STA.

[0117] The second information may be carried in a second message, and the second message may be used to request the establishment of the first predetermined service period. For example, when the first predetermined service period is R-TWT SP, the first message may be a TWT request corresponding to R-TWT.

[0118] The second message may include a second element, the second element may include a fifth field, and the fifth field may be used to carry the first feedback information. That is, the first feedback information may be carried in the fifth field in the second element of the second message. For example, when the second message is a TWT request corresponding to R-TWT, the second element may be a TWT element in the TWT request, and the first feedback information may be carried in a subfield of the TWT element.

[0119] The second element may further include a sixth field, which may be used to carry a second operation parameter. That is, the second operation parameter may be carried in the sixth field of the second element of the second message. For example, when the second element is a TWT element in a TWT request, the second operation parameter may also be carried in a subfield of the TWT element.

[0120] The second element may further include a seventh field, which may be used to indicate whether the fifth field is valid. Therefore, the first AP may determine whether the fifth field needs to be interpreted based on the seventh field, thereby saving resource overhead of the first AP.

[0121] The second element may also include an eighth field, which may be used to indicate whether the sixth field is valid. Therefore, the first AP may determine whether the sixth field needs to be interpreted based on the eighth field, which helps to save the resource overhead of the first AP. Furthermore, the eighth field may also be used to indicate the capability information of the first STA in the first predetermined service period. For example, the eighth field may indicate the capability of the first STA to switch to the secondary channel in the first predetermined service period. Based on the eighth field, the first AP may also determine the switching strategy of the sub-channel or sub-band within the first predetermined service period based on the capability information of the first STA, which helps to improve the accuracy of the sub-channel or sub-band switching strategy.

[0122] Based on the indication of the first information and the second information during the negotiation of the first predetermined service period, the wireless communication method of the embodiment of the present application may further include: after successfully establishing the first predetermined service period, during the first predetermined service period, the first AP may exchange frames with the first STA on the primary channel and / or the secondary channel, and the subchannel or subfrequency band corresponding to the primary channel and / or the secondary channel may be included in the subchannel or subfrequency band corresponding to the first operating parameter indicated in the first message. That is, after the first predetermined service period is established, the first STA may determine the subchannel or subfrequency band for the frame exchange based on the negotiated first operating parameter.

[0123] Furthermore, before the first AP exchanges frames with the first STA on the primary channel and / or secondary channel, the wireless communication method according to an embodiment of the present application may further include: the first AP sending an initial control frame to the first STA, where the initial control frame is used to instruct the first STA to switch to the subchannel or subfrequency band indicated by the first operating parameter. The initial control frame may include one or more of the following information: switching delay information of the first STA; identification information of the first STA; and the operating subchannel or subfrequency band corresponding to the first STA. The initial control frame may be a MU-RTS frame or a BSRP frame.

[0124] As another example, the first AP and the first STA may also interact with the first information and the second information within the first scheduled service period. For example, the first STA in the first scheduled service period may want to change the sub-channel or sub-band operating parameters adopted during the first scheduled service period due to the working conditions of the main channel and / or the secondary channel. The first STA may directly indicate the working conditions of the main channel and / or the secondary channel and the sub-channel or sub-band it expects to use to the first AP through the second information. Based on the second information, the first AP may indicate the sub-channel or sub-band operating parameters of the first scheduled service period and the recommendation on the use of channels in the first scheduled service period to the first STA through the first information. Based on this approach, it helps to improve the flexibility of sub-channel or sub-band use within the first scheduled service period, thereby ensuring timely transmission of services. The interaction of the first information and the second information within the first scheduled service period is introduced in detail below.

[0125] The first information may be carried in a first frame within a first predetermined service period. The first frame may be generated based on a second frame of the first STA, and the second frame carries the second information (including at least the first feedback information). The first frame and the second frame may be interactive frames within the first predetermined service period, and are not specifically limited. For example, the second frame may be a channel state information (CSI) frame or a data frame within the first predetermined service period, and the first frame may be a corresponding response frame.

[0126] Based on the indication of the first information and the second information within the first predetermined service period, the wireless communication method of the embodiment of the present application may further include: during the first predetermined service period, the first AP exchanging frames with the first STA on a primary channel and / or a secondary channel, where a subchannel or subfrequency band corresponding to the primary channel and / or the secondary channel is included in the subchannel or subfrequency band corresponding to the first operating parameter indicated in the first frame. That is, within the first predetermined service period, the first STA may determine the subchannel or subfrequency band for the frame exchange based on the negotiated first operating parameter.

[0127] As shown in Figure 9, in some implementations, the wireless communication method of the embodiment of the present application may further include step S920. In step S920, the first AP receives third information sent by the first STA. The third information may be used to indicate that the service period is the first predetermined service period. In other words, the first STA may declare to the first AP that the service period is the first predetermined service period, which helps the first AP clarify the type of the service period.

[0128] Furthermore, the third information can be carried in a third element, the third element can be carried in a third message, and the third message can be used to request the establishment of a first scheduled service period. That is, the third information can be carried in the third element of the third message. Based on this, the first STA can declare the type of service period to the first AP when requesting the establishment of the first scheduled service period, that is, during the negotiation of the first scheduled service period, to help the first AP make a reasonable response. Exemplarily, the third message can be the TWT request corresponding to R-TWT. At this time, the third element can be the TWT element in the TWT request, and the third information can be carried in the subfield of the TWT element.

[0129] As shown in Figure 10, in some implementations, the wireless communication method of the embodiment of the present application may further include step S1020. In step S1020, the first AP sends fourth information to the first STA. The fourth information may be used to indicate that the service period is the first predetermined service period. In other words, the first AP may also declare to the first STA that the service period is the first predetermined service period, which helps the first STA clarify the type of the service period.

[0130] Furthermore, the fourth information can be carried in the fourth element, the fourth element can be carried in the fourth message, and the fourth message can be used to respond to the request to establish the first scheduled service period. That is, the fourth information can be carried in the fourth element of the fourth message. Based on this, the first AP can declare the type of service period to the first STA when responding to the request to establish the first scheduled service period, that is, during the negotiation of the first scheduled service period, which helps to unify the two parties' understanding of the service period type. Exemplarily, the fourth message can be the TWT response corresponding to the R-TWT. At this time, the fourth element can be the TWT element in the TWT response, and the fourth information can be carried in the subfield of the TWT element.

[0131] As shown in Figure 11, in some implementations, the wireless communication method of the embodiment of the present application may further include step S1120. In step S1120, the first AP sends the fifth information to the first STA, and the fifth information can be used to indicate whether the first STA needs to switch back to the main channel when the frame interaction sequence on the secondary channel ends within the first predetermined service period. Based on the fifth information, it helps the first STA to clarify the sub-channel or sub-band selection after the frame interaction sequence on the secondary channel ends. For example, when the fifth information indicates that the first STA does not need to switch back to the main channel when the frame interaction sequence on the secondary channel ends, the first STA can continue to stay on the secondary channel and maintain the listening mode. For another example, when the fifth information indicates that the first STA can switch back to the main channel when the frame interaction sequence on the secondary channel ends. At this time, if the first STA wants to return to the main channel, the first STA can indicate it to the first AP.

[0132] The fifth information can be carried in the fifth element, the fifth element can be carried in the fifth message, the fifth message can be used to respond to the request to establish the first predetermined service period, or the fifth message can be carried in the beacon frame within the first predetermined service period. That is, the fifth information can be carried in the fifth element of the fifth message. For example, the fifth message can be the TWT response corresponding to the R-TWT, that is, the fifth information can be indicated during the negotiation of the first predetermined service period. For another example, the fifth message can also be a beacon frame within the R-TWT SP, that is, the fifth information can also be indicated within the first predetermined service period. Exemplarily, the fifth element can be an EHT operation element (operation element), then the fifth information can be carried in the subfield of the EHT operation element.

[0133] As shown in FIG12 , in some implementations, the wireless communication method of the embodiment of the present application may further include step S1220. In step S1220, the first AP sends sixth information to the first STA. The sixth information may be used to indicate that the first AP supports the first predetermined service period. In other words, the first AP may indicate to the first STA its capability to support the first predetermined service period, thereby facilitating the normal initiation of the first predetermined service period.

[0134] The sixth information may be carried in the sixth element, which may be carried in a beacon frame within the first predetermined service period. For example, the sixth element may be an EHT capabilities element, and the sixth information may be carried in a subfield of the EHT capabilities element.

[0135] As shown in Figure 13, in some implementations, the wireless communication method of the embodiment of the present application may further include step S1320. In step S1320, the first AP receives the seventh information sent by the first STA. The seventh information may be used to indicate that the first STA supports the first predetermined service period. In other words, the first STA may also indicate its capability information to support the first predetermined service period to the first AP, thereby facilitating the normal initiation of the first predetermined service period.

[0136] The seventh information may be carried in the seventh element, which may be carried in an association request frame or a probe request frame within the first predetermined service period. For example, the seventh element may be an EHT capabilities element, and the seventh information may be carried in a subfield of the EHT capabilities element.

[0137] In some implementations, the wireless communication method of the embodiments of the present application may further include: within a first predetermined service period, if a first AP transmits data to a first STA on a primary channel, and if the first AP does not receive a block acknowledgement (BA) for the data from the first STA, the first AP may determine a data retransmission mechanism based on whether the first STA has switched to a secondary channel. Specifically, if data transmission on the primary channel fails due to some reason, the AP may employ a certain error recovery mechanism to retransmit the data. This facilitates rapid resumption of service data transmission.

[0138] The first AP may determine a data retransmission mechanism based on whether the first STA has switched to a secondary channel. This may include: if the first STA has not switched to the secondary channel, the first AP may continue to transmit data to the first STA on the primary channel; if the first STA has switched to the secondary channel, the first AP may transmit data to the first STA on the secondary channel. Exemplarily, the data retransmission mechanism may be referred to as an error recovery process. For example, in the DSOR-TWT described above, the first STA may fail to receive data due to OBSS interference on the primary channel. In this case, the first STA may switch to the secondary channel to listen for the first AP's signal. If the first AP does not receive a BA for data transmission from the first STA, the first AP may use full channel triggering to detect whether the first STA temporarily failed to receive data due to conditions such as Bluetooth interference or has switched to the secondary channel due to OBSS interference. If the former is the case, the first AP may continue to retransmit data on the primary channel; if the latter is the case, the first AP may retransmit data on the secondary channel. This helps ensure the timely transmission of service data.

[0139] The following takes the first subscription service period as R-TWT SP as an example, and illustrates the indication method of the first information and the second information in the embodiment of the present application in conjunction with Figures 14 and 15. It is worth noting that the indication method of the first information and the second information can be in many different forms and is not limited to the method described below.

[0140] As mentioned above, the AP and the STA can exchange the first information and / or the second information during the DSO R-TWT negotiation. During the DSO R-TWT negotiation, the AP and the STA can negotiate the relevant content through the interaction of the DSO R-TWT request and the DSO R-TWT response. Therefore, the first information and / or the second information can be indicated based on the DSO R-TWT request and the DSO R-TWT response. The following is an example of indicating the first information and / or the second information through the restricted TWT traffic info field or the broadcast TWT parameter set field of the TWT element in the DSO R-TWT response / request.

[0141] Option 1: Indicate the first information and / or the second information through the restricted TWT traffic info field

[0142] As an example, the first information and / or the second information can be indicated by the restricted TWT traffic info field of the TWT element (i.e., the first element or the second element mentioned above) in the DSO R-TWT response / request (i.e., the first message / second message mentioned above). The first information may include a first operating parameter and first indication information, and the second information may include first feedback information and a second operating parameter.

[0143] As shown in Figure 14, a DSO R-TWT channel bitmap field (i.e., the first field or the sixth field mentioned above) can be added to the restricted TWT traffic info field to carry the first operating parameter or the second operating parameter, and the number of bytes of the restricted TWT traffic info field can be modified to 0 to 7. For example, the DSO R-TWT channel bitmap field can occupy 2 bytes, and the 16 bits of the DSO R-TWT channel bitmap valid field can indicate each 20MHz sub-channel or sub-band in sequence from high to low, and a total of 320MHz channels can be indicated, of which the lowest bit indicates the main 20MHz channel. In the DSO R-TWT response, the restricted TWT traffic info field can be used to carry the first operating parameter. In the DSO R-TWT request, the restricted TWT traffic info field can be used to carry the second operating parameter.

[0144] Continuing to refer to Figure 14, the primary channel interference information (primary channel collision info) field (i.e., the second field or the fifth field mentioned above) can also be added to the restricted TWT traffic info field to carry the first feedback information (taking the interference information of the primary channel as an example, and the interference information of the primary channel further taking OBSS interference as an example) or the first indication information. In the DSO R-TWT request, the primary channel collision info field can be used to carry the first feedback information. In the DSO R-TWT response, the primary channel collision info field can be used to carry the first indication information. Further, the primary channel collision info field can include an interference type (collision type) field and an interference information (collision info) field. In the DSO R-TWT request, the collision type field can be used to carry interference occupancy information, and the collision info field can be used to carry interference type information. In the DSO R-TWT response, the collision type field can be retained, and the collision info field can be retained or used to carry the first indication information. Exemplarily, the primary channel collision info field may occupy 1 byte, the collision type field may occupy 3 bits thereof, and the collision info field may occupy 5 bits thereof.

[0145] Furthermore, a DSO R-TWT channel bitmap valid field (i.e., the third field or the eighth field mentioned above) may be added to the restricted TWT traffic info field to indicate whether the DSO R-TWT channel bitmap field is valid. Exemplarily, the DSO R-TWT channel bitmap valid field may occupy one bit. Exemplarily, the DSO R-TWT channel bitmap valid field may be located in the traffic info control subfield of the restricted TWT traffic info field, such as the B2 reserved bit of the traffic info control field in FIG14 . In addition, the channel bitmap valid field may also be used to indicate the capability information of the AP or STA. In the DSO R-TWT response, the channel bitmap valid field may be used to indicate the capability information of the AP. In the DSO R-TWT request, the channel bitmap valid field may be used to indicate the capability information of the STA. Among them, the capability information of the AP may be used to indicate whether the AP has the capability to trigger all channels and / or the capability to interact with the STA on the secondary channel during the DSO R-TWT SP negotiated with the STA. The STA capability information can be used to indicate whether the STA has the ability to switch to the secondary channel according to the AP's instructions in specific situations (such as when it detects interference on the primary channel) during the DS0 R-TWT SP negotiated with the AP.

[0146] Furthermore, a primary channel collision info valid field (i.e., the fourth field or the seventh field mentioned above) can be added to the restricted TWT traffic info field to indicate whether the primary channel collision info field is valid. Exemplarily, the primary channel collision info valid field can occupy one bit. Exemplarily, the primary channel collision info valid field can also be located in the traffic info control field of the restricted TWT traffic info field, such as the B3 reserved bit of the traffic info control field in Figure 14.

[0147] The following uses the TWT element shown in Figure 14 as an example to illustrate the meaning of each subfield in the restricted TWT traffic info field. It is worth noting that the position and proportion of each subfield in the restricted TWT traffic info field are not limited, and the position and proportion of each subfield in Figure 14 are only for example.

[0148] The meaning of the DSO R-TWT channel bitmap valid subfield may include: a) If the STA sets this field in the DSO R-TWT request to 1, it may indicate that the DSO R-TWT channel bitmap field in the DSO R-TWT request is valid. It may also indicate that the STA has the ability to switch to the secondary channel according to the AP's instructions under specific circumstances (such as when it detects interference on the primary channel) during the DSO R-TWT SP negotiated with the AP; b) When the AP receives an R-TWT request with this field set to 1 sent by the STA and the AP supports DSP R-TWT operation, if the AP sets this field in the DSO R-TWT response to 1, it may indicate that the DSO R-TWT channel bitmap field in the DSO R-TWT response is valid, and the AP has the ability to trigger all channels and / or interact with the STA on the secondary channel during the DSO R-TWT SP negotiated with the STA. c) If this field in the DSO R-TWT request / response is set to 0, it may indicate that the DSO R-TWT channel bitmap field in the DSO R-TWT request / response is invalid, and the STA or AP does not have the above capabilities when this field is set to 1.

[0149] The meaning of the DSO R-TWT channel bitmap subfield may include the following: a) This field is valid when the DSO R-TWT channel bitmap valid subfield is set to 1. The DSO R-TWT channel bitmap valid field has a total of 16 bits, which can indicate each 20MHz subchannel or subband in order from high to low, totaling 320MHz channels, with the least significant bit indicating the primary 20MHz channel. b) When a STA sets some bits in this field in the DSO R-TWT request to 1, it indicates the subchannels or subbands it wishes to use during the DSO R-TWT SP (the sum of the subchannels or subbands cannot exceed the maximum bandwidth supported by the STA). If the AP has announced a channel list to the STA through the TWT element of the beacon frame before DSO R-TWT is established, the STA is only allowed to select from the channel list announced by the AP when setting this field. If it is a 20MHz-only STA, at most one bit of this field can be set to 1, that is, at most one subchannel or subband it wishes to use during the DSO R-TWT SP. c) When the AP sets some bits in this field in the DSO R-TWT response to 1, it may indicate that the AP allows the STA to use the sub-channel or sub-band within the DSO R-TWT SP. If the STA violates the relevant rules, the AP may reject the STA's DSO R-TWT request by setting this field in the DSO R-TWT response to all 0s. After the STA receives the R-TWT response with this field set to all 0s, if it still wants to establish a DSO R-TWT with the AP, it may resend the R-TWT request that complies with the relevant rules after receiving the R-TWT response SIFS or after re-acquiring the TXOP.

[0150] The meaning of the primary channel collision info valid subfield may include: a) If the STA sets this subfield in the DSO R-TWT request to 1, it may indicate that the primary channel collision info subfield in the DSO R-TWT request is valid, otherwise it is invalid. b) If the AP sets this subfield in the DSO R-TWT response to 1, it may indicate that the primary channel collision info subfield in the DSO R-TWT response is valid, otherwise it is invalid.

[0151] The meaning of the collision type subfield may include: a) When the STA sets this field in the DSO R-TWT request, this field can be used to indicate the interference type on the primary channel, where a value of 0 can indicate reserved and a value of 1 can indicate OBSS interference. The remaining values ​​of this field are not limited, and the interference type corresponding to the specific value depends on the specific implementation. For example, a value of 2 can indicate Bluetooth interference, etc. b) This field can be retained when the AP sets this field in the DSO R-TWT response.

[0152] The meaning of the collision info subfield may include: a) When the STA sets this field in the DSO R-TWT request, this field can be used to indicate the OBSS interference occupancy rate of the main channel. The larger the interference ratio, the larger the value of this field (for example, the value of this field can be 0 to 31. Every time the value of this field increases by 1, it can indicate that the interference ratio increases by approximately 100 / 31=3.226%. The STA can adopt a rounded calculation method when calculating statistical information). b) When the AP sets this field in the DSO R-TWT response, this field can be retained. Alternatively, the AP can set this field in the DSO R-TWT response to indicate a suggestion to the STA to use the channel within the DSO R-TWT SP (i.e., the first indication information), and supplement the first operating parameter. For example, when the AP sets this field, only the first two bits (B0 and B1) can be used, and the remaining 3 bits are reserved. The AP can set the value of the first two bits based on the OBSS interference occupancy rate of the main channel received from the STA feedback. The specific setting depends on the specific implementation and is not limited in this application. Exemplarily, when the AP sets the first two bits of this field, their values ​​and meanings may be as shown in Table 1.

[0153] Table 1 Meaning of collision info subfields

[0154] Option 2: Indicate the first information and / or the second information via the broadcast TWT parameter set field

[0155] As another example, the first information and / or the second information may also be indicated by the broadcast TWT parameter set field of the TWT element (i.e., the first element or the second element mentioned above) in the R-TWT response / request (i.e., the first message / second message mentioned above). The first information may include a first operating parameter and first indication information, and the second information may include first feedback information and a second operating parameter.

[0156] As shown in Figure 15, a DSO R-TWT channel field (i.e., the first field or the sixth field mentioned above) can be added to the broadcast TWT parameter set field to carry the first operating parameter or the second operating parameter. For example, the DSO R-TWT channel field can occupy 2 bytes, and the 16 bits of the DSO R-TWT channel bitmap valid field can indicate each 20MHz sub-channel or sub-band in sequence from high to low, and a total of 320MHz channels can be indicated, of which the lowest bit indicates the main 20MHz channel. In the DSO R-TWT response, the DSO R-TWT channel field can be used to carry the first operating parameter. In the DSO R-TWT request, the DSO R-TWT channel field can be used to carry the second operating parameter.

[0157] Continuing to refer to Figure 15, a primary channel collision info field (i.e., the second field or the fifth field mentioned above) can also be added to the broadcast TWT parameter set field to carry the first feedback information (taking the interference information of the main channel as an example, and the interference information of the main channel further taking OBSS interference as an example) or the first indication information. In the DSO R-TWT request, the primary channel collision info field can be used to carry the first feedback information. In the DSO R-TWT response, the primary channel collision info field can be used to carry the first indication information. Furthermore, the primary channel collision info field can include a collision type field and a collision info field. In the DSO R-TWT request, the collision type field can be used to carry interference occupancy information, and the collision info field can be used to carry interference type information. In the DSO R-TWT response, the collision type field can be retained, and the collision info field can be retained or used to carry the first indication information. Exemplarily, the primary channel collision info field can occupy 1 byte, the collision type field can occupy 3 bits thereof, and the collision info field can occupy 5 bits thereof.

[0158] The following uses the TWT element shown in Figure 15 as an example to illustrate the meaning of each subfield in the broadcast TWT parameter set field. It is worth noting that the position and proportion of each subfield in the broadcast TWT parameter set field are not restricted, and the position and proportion of each subfield in Figure 15 are only examples.

[0159] The meaning of the DSO R-TWT channel subfield may include: a) The DSO R-TWT channel field has a total of 16 bits, indicating each 20MHz channel from high to low, and a total of 320MHz channels, of which the lowest bit indicates the main 20MHz channel. b) When the STA sets some of the bits in this field in the DSO R-TWT request to 1, it can indicate the subchannels or subbands that it expects to use during the DSO R-TWT SP (the sum of the subchannels or subbands cannot exceed the maximum bandwidth supported by itself). If the AP has announced the channel list to the STA through the TWT element of the beacon frame before the DSO R-TWT is established, then the STA is only allowed to select from the channel list announced by the AP when setting this field. If it is a 20MHz only STA, at most one bit of this field can be set to 1, that is, there can be at most one subchannel or subband that it expects to use during the DSO R-TWT SP. c) When the AP sets some bits in this field in the DSO R-TWT response to 1, it may indicate that the AP allows the STA to use the sub-channel or sub-band within the DSO R-TWT SP. If the STA violates the relevant rules, the AP may reject the STA's DSO R-TWT request by setting this field in the DSO R-TWT response to all 0s. After the STA receives the R-TWT response with this field set to all 0s, if it still wants to establish a DSO R-TWT with the AP, it may resend the R-TWT request that complies with the relevant rules after receiving the R-TWT response SIFS or after re-acquiring the TXOP.

[0160] The meaning of the collision type subfield may include: a) When the STA sets this field in the DSO R-TWT request, this field can be used to indicate the interference type on the primary channel, where a value of 0 can indicate reserved and a value of 1 can indicate OBSS interference. The remaining values ​​of this field are not limited, and the interference type corresponding to the specific value depends on the specific implementation. For example, a value of 2 can indicate Bluetooth interference, etc. b) This field can be retained when the AP sets this field in the DSO R-TWT response.

[0161] The meaning of the collision info subfield may include: a) When the STA sets this field in the DSO R-TWT request, this field can be used to indicate the OBSS interference occupancy rate of the main channel. The larger the interference ratio, the larger the value of this field (for example, the value of this field can be 0 to 31. Every time the value of this field increases by 1, it can indicate that the interference ratio increases by approximately 100 / 31=3.226%. The STA can adopt a rounded calculation method when calculating statistical information). b) When the AP sets this field in the DSO R-TWT response, this field can be retained. Alternatively, the AP can set this field in the DSO R-TWT response to indicate a suggestion to the STA to use the channel within the DSO R-TWT SP (i.e., the first indication information), and supplement the first operating parameter. For example, when the AP sets this field, only the first two bits (B0 and B1) can be used, and the remaining 3 bits are reserved. The AP can set the value of the first two bits based on the OBSS interference occupancy rate of the main channel received from the STA feedback. The specific setting depends on the specific implementation and is not limited in this application. Exemplarily, when the AP sets the first two bits of this field, their values ​​and meanings may be as shown in Table 1.

[0162] It is worth noting that during DSO R-TWT negotiation, the AP may also indicate the first operating parameter to the STA through the PS160 subfield and the RU allocation subfield of the EHT variant user info field. In this case, the AP may retain the DSO R-TWT channel bitmap subfield in Option 1, or the AP may retain the DSO R-TWT channel subfield in Option 2.

[0163] As mentioned above, the AP and STA may also indicate the first information and / or the second information in the DS0 R-TWT SP. For example, the STA may feed back the first feedback information to the AP through a CSI frame. For example, the STA may include information such as the signal to noise ratio (SNR) of the primary channel in the CSI report field of the CSI frame and report it to the AP, and the CSI report may also feed back many other channel information. For example, the AP may use the null data packet announcement and null data packet (NDPA&NDP) mechanism to request the STA to perform relevant channel measurements, and the STA may store the measurement results in the CSI frame and send them to the AP as a response to the NDPA&NDP; the AP may also use a normal sounding PPDU to request the STA to send a CSI report, and only needs to set the CSI / steering value (steering) subfield in the high-throughput (HT) control field of the sounding PPDU or NDP to 1, indicating that the STA is requested to send a CSI report. The CSI / steering subfield is used to specify the feedback type of the STA. When collecting CSI reports from multiple STAs, the AP can obtain a comprehensive view of multipath propagation and channel characteristics on the same channel. The AP can analyze and process these CSI reports to infer channel models and characteristics, such as path loss, multipath delay, phase variation, and channel fading. Based on the inferred channel model, the AP can perform operations such as beamforming, wireless resource allocation, and interference management. Based on the STA's first feedback information, the AP can indicate first operating parameters to the STA via a related frame.

[0164] The following takes the first subscription service period as R-TWT SP as an example to illustrate the indication method of the third information or the fourth information in conjunction with Figure 16. It is worth noting that the indication method of the third information or the fourth information can be in many different forms and is not limited to the method described below.

[0165] As mentioned above, the AP and STA can indicate the third information or the fourth information during the DSO R-TWT negotiation. During the DSO R-TWT negotiation, the AP and STA can negotiate the relevant content through the interaction of the DSO R-TWT request and the DSO R-TWT response. Therefore, the third information or the fourth information can be indicated based on the DSO R-TWT request and the DSO R-TWT response.

[0166] For example, the AP and STA can add a new value to the broadcast TWT recommendation subfield in the TWT element (i.e., the third element or the fourth element mentioned above) of the DSO R-TWT request / response (i.e., the third message / fourth message mentioned above) to indicate that the current broadcast TWT is DSO R-TWT. For example, the value can be 5. As shown in Figure 16, this field is located in the request type subfield of the broadcast TWT parameter information set field of the TWT element. The value of this field and its meaning can be shown in Table 2.

[0167] Table 2 Values ​​and meanings of the broadcast TWT recommendation subfield

[0168] The following takes the first subscription service period as R-TWT SP as an example to illustrate the indication of the fifth information in conjunction with Figure 17. It is worth noting that the indication of the fifth information can be in many different forms and is not limited to the form described below.

[0169] Exemplarily, the AP may indicate the fifth information through the EHT operation element (i.e., the fifth element described above). For example, as shown in Figure 17, the AP may modify B6 of the EHT operation element to a channel switching indication subfield to indicate whether the STA can switch back to the primary channel after the DSO sequence ends within its corresponding DSO R-TWT SP. Furthermore, the EHT operation element may be included in the R-TWT response (i.e., the fifth message described above) for indication, or it may be included in the beacon frame (i.e., the fifth message described above) for indication after the DSO R-TWT is established.

[0170] The meaning of the channel switching indication subfield may include: a) When this field is set to 0 by the AP, it can indicate that if the STA in the DSO R-TWT SP switches to the negotiated secondary channel due to primary channel OBSS interference and successfully starts the DSO frame exchange sequence with the AP (i.e., the frame exchange sequence in the DSO R-TWT SP), then after the DSO frame exchange sequence ends, the STA can continue to stay in the secondary channel in listening mode for the remaining time in the SP. b) When this field is set to 1 by the AP, it can indicate that if the STA in the DSO R-TWT SP switches to the negotiated secondary channel due to primary channel OBSS interference and successfully starts the DSO frame exchange sequence with the AP, then after the DSO frame exchange sequence ends, if the STA wants to return to the primary channel, it can indicate it in the last frame transmitted before the end of the DSO frame exchange sequence, or re-compete for TXOP on the secondary channel and send a frame to the AP to indicate it, and include relevant information about the channel switching such as its own switching delay. After switching back to the primary channel, the STA can perform CCA on the primary channel to obtain the primary channel status.

[0171] The following takes the first subscription service period as R-TWT SP as an example to illustrate the indication of the sixth information and the seventh information in conjunction with Figure 18. It is worth noting that the indication of the sixth information and the seventh information can be in many different forms and is not limited to the form described below.

[0172] When using the DSO R-TWT mechanism, the AP and STA can indicate their support for the DSO R-TWT capability. For example, the AP side can indicate it through a beacon frame, and the STA side can indicate it through an association request / probe request frame. For example, as shown in Figure 18, the two can modify the B14 reserved bit of the EHT medium access control (MAC) capability information field of the EHT capabilities element (i.e., the sixth element or seventh element mentioned above) in the corresponding frame to the DSO restricted TWT support field. The DSO restricted TWT support subfield can be used to indicate DSO R-TWT capability. For example, if an AP or STA has DSO R-TWT capability, the value of this subfield can be set to 1 to indicate support for DSO R-TWT operation, otherwise it is set to 0.

[0173] It is worth noting that in some implementations, the STA and the AP may not change the interaction of the capability information of the STA joining the BSS to which the AP belongs. That is, the AP may not indicate the fourth information and the sixth information to the STA, and the STA may not indicate the third information and the seventh information to the AP. That is, in the above example, the STA and the AP may not modify the reserved bits of the EHT MAC capabilities element, nor modify the value of the broadcast TWT recommendation field. In this case, the STA and the AP may declare their respective capability information when the DSO R-TWT is established. For example, during the DSO R-TWT negotiation, the STA and the AP may indicate the first information and / or the second information by using the restricted TWT traffic info field in option one or the broadcast TWT parameter set field in option two, while setting the DSO R-TWT channel bitmap valid subfield to 1 or setting the DSO R-TWT channel field to non-0, indicating that the STA and the AP support the DSO R-TWT operation.

[0174] It is worth noting that in some implementations, when the indication method of the first information and the second information adopts option 2 described above, and the STA and the AP modify the value of the broadcast TWT recommendation field to indicate the third information or the fourth information, and at the same time modify the reserved bit of the EHT MAC capabilities element to the DSO restricted TWT support subfield to indicate the sixth information or the seventh information, the DSO restricted TWT support subfield and the broadcast TWT recommendation field can also be used to indicate whether the DSO R-TWT channel field and the primary channel collision info field in the TWT element are valid. For example, when the DSO restricted TWT support field of the EHT capabilities element is set to 1 and the value of broadcast TWT recommendation is set to 5, the DSO R-TWT channel field and the primary channel collision info field in the corresponding TWT element are valid, otherwise they are retained.

[0175] Rules for DSO R-TWT

[0176] The following describes the rules of DSO R-TWT with examples in conjunction with Figures 19 and 20. It is worth noting that the rules of DSO R-TWT may include one or more of the following rules, and may also include rules other than the following rules.

[0177] EHT STAs and EHT APs that support DSO R-TWT operation shall set the DSO restricted TWT support subfield in the EHT capabilities element they send to 1, and shall set the broadcast TWT support subfield in the HE capabilities element they send to 1; otherwise, the EHT STA shall set the DSO restricted TWT support subfield in the EHT capabilities element it sends to 0.

[0178] A DSO R-TWT AP is an EHT AP that sets the DSO restricted TWT support subfield in the transmitted EHT capabilities element to 1.

[0179] A DSO R-TWT STA is an EHT STA that sets the DSO restricted TWT support subfield in the transmitted EHT capabilities element to 1, and sends or receives a broadcast TWT element carrying one or more restricted TWT parameter set fields to or from a DSO R-TWT AP.

[0180] A DSO R-TWT STA establishes one or more DSO R-TWTs with its associated EHT AP by following the rules defined in the Broadcast TWT in the existing rules and the additional rules and restrictions defined in the following subclauses. An EHT STA supporting DSO R-TWT operation follows the rules defined in the Broadcast TWT in the existing rules and the additional rules and restrictions defined in the following subclauses.

[0181] The establishment of DSO R-TWT members uses the same process described in the existing rules for establishing R-TWT members.

[0182] The DSO R-TWT AP shall set the trigger field in the restricted TWT parameter set field it sends to 1.

[0183] When the restricted TWT parameter set field is included in an individually addressed management frame sent by a DSO R-TWT AP or DSO R-TWT STA for DSO R-TWT member setup, the restricted TWT traffic info present subfield of the broadcast TWT info field contained in the restricted TWT parameter set field shall be set to 1.

[0184] DSO R-TWT AP and DSO R-TWT STA should also set the restricted TWT traffic info field. In addition to indicating the TID of delay-sensitive traffic like R-TWT in the existing rules, if the channel needs to be indicated, the DSO R-TWT channel bitmap valid in the traffic info control field of the restricted TWT traffic info field should be set to 1, and the channels allowed to be used within the DSO R-TWT SP should be indicated by setting the DSO R-TWT channel bitmap in the restricted TWT traffic info field.

[0185] DSO R-TWT establishment process

[0186] The following is an example of the process of establishing a DS0 R-TWT with reference to the figure. It is worth noting that the process of establishing a DS0 R-TWT may include one or more of the following rules, and may also include rules other than the following rules.

[0187] If a STA wants to apply to join a DSO R-TWT of an AP, it can send an R-TWT request to the AP. The TWT element contained in it can carry its own capability information, channel information, and other information. The specific field settings are as follows.

[0188] The STA can set the broadcast TWT recommendation subfield in the TWT element to 5 to indicate that the broadcast TWT applied for is a DSO R-TWT; the DSO R-TWT channel bitmap valid subfield in the TWT element can be set to 1 to indicate that the DSO R-TWT channel bitmap field is valid and that the STA has the ability to switch to the secondary channel according to the AP's instructions in specific circumstances (such as when it detects interference on the primary channel) during the DSO R-TWT SP period subsequently assigned to it by the AP; at the same time, the DSO R-TWT channel bitmap field can be set to indicate the channel it expects to use if OBSS interference is detected on its primary channel during the DSO R-TWT SP period subsequently assigned to it by the AP. It should be noted that the STA can choose to apply for changes to the working parameters (mainly for parameters related to the channel switching mode) based on the statistical information of the OBSS interference occupancy rate of the primary channel detected by itself during the SP period of other DSO R-TWTs it has previously joined or during the subsequent DSO R-TWT SP period, so that the AP can schedule the STA in a more appropriate manner. There are two ways to change the working parameters.

[0189] a) The STA can resubmit a DSO R-TWT from the AP to specify the new operating parameters; b) The STA can directly transmit additional parameter change information in the frames transmitted within the SP. For method a), the STA can include this statistical information in the primary channel collision info field of the R-TWT request; for method b), the STA can include this statistical information in frames such as data frames and response frames.

[0190] After the AP receives the R-TWT request with the TWT element sent by the STA, it can send an R-TWT response according to the STA's request to indicate its own capabilities, the working mode to be adopted during the DSO R-TWT SP, and the approval of the STA's application for available channels. The specific settings of the fields are as follows.

[0191] The AP can indicate its approval of the STA's request to join a group by setting the broadcast TWT recommendation subfield in the TWT element to 5. The AP can also set the DSO R-TWT channel bitmap valid subfield in the TWT element to 1, indicating that the DSO R-TWT channel bitmap field is valid and that the AP has the capability to trigger all channels and interact with the STA on secondary channels during the DSO R-TWT SP period negotiated with the STA. The AP can also set the DSO R-TWT channel bitmap field to indicate the channels the STA can use during subsequent DSO R-TWT SP periods. Furthermore, if the AP receives a frame containing the aforementioned status feedback information from the STA (such as the OBSS interference occupancy of the primary channel over a period of time), indicating that the STA requires a change in operating parameters, the AP can set the values ​​of the DSO R-TWT channel bitmap and primary channel collision info fields based on the occupancy. The former indicates a new DSO channel, and the latter indicates enhanced channel usage within the SP. If the occupancy is high, the latter field value is set to 2 or 3; otherwise, it should be set to 1.

[0192] At this point, the STA successfully joins a DSO R-TWT of the AP through interaction with the AP's R-TWT req. / resp. and becomes a member STA of the AP.

[0193] AP rules in DSO R-TWT

[0194] The following examples illustrate the rules of AP in DSO R-TWT. It is worth noting that the rules of AP in DSO R-TWT may include one or more of the following rules, and may also include rules other than the following rules.

[0195] When the AP operates in DSO R-TWT mode and the STA supports DSO R-TWT mode, the rules followed by the AP are as follows.

[0196] a) The DS0 initial control frame can be (MU-)RTS or BSRP.

[0197] If it is (MU-)RTS, the AP should trigger multiple STAs in sequence after entering the error recovery process in the DSO R-TWT SP, and give priority to triggering the currently working member STA (the STA that has negotiated DSO R-TWT with AP1 and whose SP is its corresponding SP);

[0198] ● If BSRP is used, the AP can trigger multiple STAs simultaneously after entering the error recovery process in the DSO R-TWT SP;

[0199] ●If there are multiple STAs that need to be triggered, the User Info field of the DSO initial control frame indicates the relevant STAs.

[0200] b) If the AP receives an R-TWT request or other frame with feedback information, it can indicate the DSO channel that the STA should use during the DSO R-TWT SP and related suggestions for channel usage in the R-TWT response or other response frame based on the OBSS interference occupancy and other interference conditions on the STA primary channel within a period of time fed back by the STA. For example, if the collision info subfield of the primary channel collision info field is set on the AP side, the STA should give priority to using the channel according to the parameter indication.

[0201] c) Within the DSO R-TWT SP, if the AP does not receive a reply from the STA after SIFS to the frame it transmits to the currently working STA, the AP may send a DSO initial control frame on the full channel after the point coordination function inter-frame space (PIFS), subject to the following restrictions.

[0202] The DSO initial control frame cannot be a broadcast data frame or a broadcast management frame. The DSO initial control frame should be in non-HT PPDU or non-HT duplicate PPDU format and sent at a rate of 6 Mb / s, 12 Mb / s, or 24 Mb / s.

[0203] ●The DSO initial control frame can be MU-RTS or BSRP trigger frame;

[0204] ●The sending channel of the DSO initial control frame can include the current primary channel and the secondary channel expected to be negotiated.

[0205] d) After sending the initial DSSO control frame, the AP can detect responses from the currently active STA on all channels. This detection method is as follows: The AP has the ability to monitor all channels and uses a sequential triggering process. Specifically, if no response is received from an OBSS STA, it prioritizes triggering only that OBSS STA on all channels, then triggering other member STAs on the primary channel. Therefore, once the AP receives a CTS, it has detected the signal from the currently active STA. The detected signal may fall into one of the following three categories:

[0206] If the AP detects the signal of the currently working STA on the primary channel, it can enter the existing error recovery process. That is, after receiving the STA response, the AP retransmits the PPDU after SIFS. After completing the error recovery, the PPDU transmission ends.

[0207] If the AP detects the signal of the current working STA on the secondary channel, the AP can regard the current STA as having switched its own working channel to the corresponding secondary channel, and the subsequent frame exchange process between the AP and the current working STA will be carried out on the secondary channel;

[0208] ●If the AP does not detect the signal of the current working STA on the primary channel or the secondary channel, the AP can resend the DSO initial control frame to continue detecting the current working STA until the signal of the current working STA is detected or the maximum number of retransmissions is reached.

[0209] e) If the AP confirms that the STA has switched to the secondary channel and performs a DS0 frame interaction sequence with the STA on the secondary channel, the AP needs to occupy the primary channel during the subsequent DS0 frame interaction sequence, as shown in the following example.

[0210] The AP can send redundant data frames on the secondary channel on the primary channel.

[0211] ●The AP can schedule other STAs to the primary channel.

[0212] f) After the AP and STA enter the DSO frame exchange sequence, if the AP does not receive a response from the STA within SIFS after the frame transmission for the frame to which the AP needs to receive a response, and wants to continue the frame exchange sequence with the STA, the AP can resend a DSO initial control frame to the STA before the transmission network allocation vector (TXNAV) timer expires.

[0213] g) If the current DS0 frame interaction sequence ends and the AP does not have any special instructions, the STA will continue to work on the secondary channel by default. The process of the AP starting the DS0 interaction sequence can be shown in Figure 19.

[0214] Rules for STA in DSO R-TWT

[0215] The following example illustrates the STA rules in DSO R-TWT. It is worth noting that the STA rules in DSO R-TWT may include one or more of the following rules, or may include rules other than the following rules.

[0216] When a STA operates in DSO R-TWT mode and the AP supports DSO R-TWT mode, the rules followed by the STA are as follows.

[0217] a) STA can change the working parameters by negotiating with AP. For example, STA may want to change the channel used during DSO R-TWT SP due to the OBSS occupancy of the main channel. Then there are two options: 1. STA can re-establish a new DSO R-TWT with AP. Specifically, STA can indicate the OBSS interference occupancy of the main channel for a period of time in R-TWT request. AP will adjust the channel to be used by STA during DSO R-TWT SP by indicating DSO channel in R-TWT response based on the feedback information; 2. STA can update parameters within DSO R-TWT SP, specifically by providing feedback in CSI frames or adding feedback information to R-TWT response, PPDU or BA frames. AP will give relevant instructions / responses to STA based on the feedback information.

[0218] b) Optionally, if the STA receives an R-TWT response in which the value of the collision info subfield of the primary channel collision info field in the TWT element is set to 2 or 3, then the STA should give priority to the negotiated DSO channel in the corresponding DSO R-TWT SP, and the STA can communicate with the AP on the negotiated channel in the corresponding SP; if the STA receives an R-TWT response in which the value of the collision info subfield of the primary channel collision info field in the TWT element is set to 1, it should give priority to using the primary channel to communicate with the AP (this rule also applies to the case where the field value is set to 3). If the STA cannot use the primary channel due to OBSS interference on the primary channel during the SP, the STA should use the DSO channel negotiated with the AP to perform DSO operation with the AP during the DSO R-TWT SP.

[0219] c) Before the SP begins or while waiting to receive data within the SP, the STA can switch its operating channel to the secondary channel. After switching to the secondary channel, the STA can enter monitoring mode, which includes CCA detection and waiting to receive the DSO initial control frame sent by the AP. The STA remains on the secondary channel for the remaining SP time.

[0220] d) The STA receives the DSO initial control frame sent by the AP on the secondary channel to confirm the start of the frame interaction sequence on the secondary channel within the DSO R-TWT SP. The DSO initial control frame cannot be a broadcast data frame or a broadcast management frame, and the following requirements may exist.

[0221] The DSO initial control frame can be in non-HT PPDU or non-HT duplicate PPDU format and can be sent at 6 Mb / s, 12 Mb / s, or 24 Mb / s.

[0222] The initial control frame for DSO can be a MU-RTS or BSRP trigger frame. When a STA receives a MU-RTS or BSRP trigger frame on a secondary channel, it should reply to the AP on the secondary channel according to existing rules. The transmission spatial stream of the reply frame to the BSRP trigger frame can be limited to one spatial stream. The relevant instructions are indicated in the BSRP trigger frame.

[0223] e) After receiving the DSO initial control frame and replying with a response frame, the STA can transmit and receive data on the secondary channel according to its own spatial stream capability, available bandwidth, and operating mode. The relevant information can be indicated through the operating mode field of the operating mode notification element or the EHT OM control subfield of the HT control field during the DSO R-TWT negotiation; during the DSO data frame interaction, the AP will not communicate with the STA on the original primary channel.

[0224] f) During the DSO data frame exchange process, if the following situation occurs, the STA will return to the monitoring mode on the secondary channel and it will be considered that this frame exchange sequence is completed.

[0225] If a STA receives a DSO initial control frame but does not receive a PHY-RXSTART.indication primitive after aSIFSTime + aSlotTime + aRxPHYStartDelay, where aRxPHYStartDelay is 20 microseconds, the start time of this time is after the STA transmits the response for a PPDU that requires a response, and after the STA receives the PPDU for a PPDU that does not require a response.

[0226] If a STA receives a DSO initial control frame and receives a PHY-RXSTART.indication primitive after aSIFSTime + aSlotTime + aRxPHYStartDelay, where aRxPHYStartDelay is 20 microseconds, the starting time is after the STA transmits the response for a PPDU requiring a response and after the STA receives the PPDU for a PPDU not requiring a response. The PPDU corresponding to the PHY-RXSTART.indication primitive may contain any of the following frames.

[0227] 1.RA is a separately addressed frame with the MAC address of the STA;

[0228] 2. A trigger frame addressed to the STA and containing a user info field;

[0229] 3. RA is a CTS-to-self frame with the MAC address of the AP to which the STA belongs;

[0230] 4. A Multi-STA BlockAck frame addressed to the STA containing a Per AID TID info field;

[0231] 5. An NDP announcement frame and a sounding NDP containing a STA info field addressed to the STA.

[0232] ●If a STA receives a DSO initial control frame but does not respond to the most recent frame that requires a reply after SIFS.

[0233] g) STAs will only exchange DSO frames with the AP on the secondary channel negotiated during DSO R-TWT establishment. STAs cannot actively send frames when switching to the secondary channel.

[0234] h) Based on the instructions during negotiation or in the beacon frame, the STA can choose between the following two operating modes after the DSO frame interaction sequence ends: 1. It can continue to maintain monitoring mode on the secondary channel; 2. It can switch back to the primary channel. Before switching, the AP must be notified. The switching process may require consideration of the switching delay. After switching, a CCA must be performed on the primary channel to obtain the primary channel status.

[0235] i) After the DS0 R-TWT SP ends, if the STA remains on the secondary channel, it can choose whether to switch back to the primary channel as needed. If necessary, the STA can indicate its intention to switch back to the primary channel in the last frame it transmits within the SP. After switching back to the primary channel, the STA needs to perform a CCA on the primary channel to obtain the primary channel status. In this scenario, switching latency does not need to be considered.

[0236] The workflow of STA entering the DSO frame interaction sequence can be shown in Figure 20. The detailed process of the frame interaction sequence after STA switches to the secondary channel can be found in the STA rule description and implementation example.

[0237] The wireless communication method of the embodiment of the present application is introduced below with examples in conjunction with Figures 21 to 39. For example, the R-TWT using the wireless communication method in the embodiment of the present application can be called DSO R-TWT, the subchannel or sub-band that the STA can use in the DSO R-TWT can be called a DSO channel, the initial control frame sent by the AP in the DSO R-TWT can be called a DSO initial control frame, the interaction sequence between the AP and the STA in the DSO R-TWT can be called a DSO (frame) interaction sequence, the first operating parameter mentioned above can be called a DSO operating parameter, and the data retransmission mechanism mentioned above can be called a DSO operation process. In Figures 21 to 39, R-TWT takes trigger-enabled R-TWT as an example, the primary channel takes P20 as an example, the secondary channel takes S20 as an example, and AP1 can schedule STA1 and STA2.

[0238] In the following embodiments 1 to 17, when negotiating the DSO channel during the negotiation of DSO R-TWT, the AP side does not use the primary channel collision info field of the TWT element. In this case, the AP can retain the primary channel collision info field and only indicate the negotiated DSO channel through the DSO R-TWT channel bitmap field or the PS160 subfield and RU allocation subfield of the EHT variant user info field. The STA can also only use the DSO channel negotiated through these fields. Among them, the DSO R-TWT SP in embodiments 1 to 11 takes downlink transmission as an example, and the DSO R-TWT SP in embodiments 12 to 17 takes uplink transmission as an example.

[0239] Example 1

[0240] As shown in Figure 21, in Example 1, STA1 can apply to join AP1's DSO R-TWT and perform an R-TWT req. / resp. interaction with AP1. In the R-TWT req. / resp., STA1 and AP1 can exchange DSO operation parameters within the DSO R-TWT (for example, negotiating the DSO channel). AP1 initially schedules only STA1 (possibly because STA1 has a higher priority) to transmit on the primary channel. After sending a PPDU to STA1, AP1 does not receive a BA from STA1. In this case, if no BA is received from any STA, AP1 will enter a special error recovery mode, that is, re-triggering the STA after PIFS. The triggering method here is modified to send a DSO initial control frame (for example, a (MU-)RTS frame) on all channels (the previously negotiated channel list) and only trigger STA1. After receiving STA1's response, AP1 triggers other STAs (such as STA2), and then retransmits the PPDU to STA1 on the DSO channel determined in the previous negotiation, and sends the PPDU to STA2 on the primary channel. After SP ends, STA1 decides whether to return to the main channel based on its own needs.

[0241] Example 2

[0242] As shown in Figure 22, Example 2 is similar to Example 1, except that the DSO initial control frame in Example 2 uses BSRP. After AP1 fails to transmit data, AP1 can trigger both STA1 and STA2 using the DSO initial control frame. AP1 then interacts with STA1 and STA2 on the previously negotiated DSO channel and the primary channel, respectively. After the SP ends, STA1 can decide whether to return to the primary channel as needed.

[0243] Example 3

[0244] In Example 3, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of Example 1 shown in FIG21, and the SP of DSO R-TWT may be as shown in FIG23. Referring to FIG23, within the DSO R-TWT SP, the error recovery mode when AP1 does not receive any BA from any STA is similar to that in Example 1, except that AP1 may not have data to transmit to other member STAs. Therefore, in FIG23, AP1 can trigger only STA1 through the DSO initial control frame during error recovery. After receiving the response from STA1, AP1 can occupy the main channel by retransmitting PPDU on the DSO channel determined in the preliminary negotiation and sending redundant PPDU on the main channel to avoid other member STAs from preempting the main channel and interfering with STA1's transmission. After the SP ends, STA1 can decide whether to return to the main channel according to its own needs.

[0245] Example 4

[0246] In the fourth embodiment, the preliminary negotiation process of DSO R-TWT can be the same as the preliminary negotiation process of the first embodiment shown in FIG21, and the SP of DSO R-TWT can be shown in FIG24. Referring to FIG42, within the DSO R-TWT SP, STA1 can include some feedback information (such as the OBSS interference occupancy rate on the main channel for a period of time) in a BA transmitted during the DSO interaction sequence. After receiving it, AP1 sends an R-TWT response to STA1 to update the DSO operation parameters with STA1 (for example, as shown in FIG24, the DSO channel is updated to the main channel). AP1 can wait for a period of time (the switching delay of STA1 negotiated in advance), and then interact with STA1 on the new DSO channel. At the same time, it can also interact with other member STAs on the main channel. It should be noted that the switching delay of STA1 may be longer. During this period, AP1 can provide services to other member STAs or fill in the waiting time for STA1 to complete the switching.

[0247] Example 5

[0248] As shown in Figure 25, in Example 5, based on the scenario in which STA1 switches back to the primary channel after the DSO frame interaction sequence in Example 3, during the early negotiation process of DSO R-TWT, AP1 can set the channel switching indication subfield of the EHT operation element in the R-TWT response to 1, indicating that STA1 can switch back to the primary channel after the DSO frame interaction sequence ends. In Example 5, the first half of the DSO R-TWT SP is the same as that in Example 3. After the DSO frame interaction sequence ends, STA1 may want to switch back to the primary channel because it predicts that the OBSS interference may end based on the statistical information in the previous SP or for other reasons. In this case, STA1 can indicate this requirement in the BA and feedback channel switching related information such as its own switching delay. Then STA1 can obtain the primary channel status by performing CCA on the primary channel, and AP1 can interact with STA1 and STA2 on the primary channel after the switching delay + SIFS time.

[0249] Example 6

[0250] In Example 6, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of Example 5 shown in Figure 25, and the DSO R-TWT SP process may be shown in Figure 26. Referring to Figure 26, Example 6 is similar to the DSO R-TWT SP scenario of Example 5, except that in Example 6, STA1 may fail to predict the end time of OBSS interference on the main channel or a deviation may occur. Therefore, after STA1 ends the DSO frame interaction sequence and returns to the main channel, the OBSS interference on the main channel still exists, and STA1 cannot use the main channel. In this case, AP1 cannot receive BA from STA1, and may resend the DSO initial control frame for error recovery. The error recovery process adopted by AP1 can refer to Examples 1 and 3.

[0251] Example 7

[0252] In Example 7, the pre-negotiation process of DSO R-TWT can be the same as the pre-negotiation process of Example 5 shown in Figure 25, and the DSO R-TWT SP process can be shown in Figure 27. Referring to Figure 27, Example 7 is similar to the DSO R-TWT SP scenario of Example 5, except that in Example 7, after the DSO frame interaction sequence ends, AP1 has no data for STA1, then AP1 can interact with other STAs first, and then interact with STA1 on the main channel when there is data for STA1. In this case, AP1 does not need to consider the switching delay of STA1, and can directly interact with STA2 after receiving the SIFS of BA from STA1.

[0253] Example 8

[0254] In the eighth embodiment, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of the first embodiment shown in FIG21, and the DSO R-TWT SP process may be shown in FIG28. Referring to FIG28, the eighth embodiment is similar to the DSO R-TWT SP scenario of the first embodiment, except that after AP1 sends the DSO initial control frame ((MU-)RTS frame) on all channels (the list of channels negotiated in the preliminary phase), STA1 may not have completed the channel switching and therefore cannot respond to AP1. In this case, AP1 may retransmit the DSO initial control frame after PIFS, and after receiving the response from STA1 on the DSO secondary channel determined in the preliminary negotiation, the subsequent process is the same as that of the first embodiment.

[0255] Embodiment 9

[0256] In the ninth embodiment, the preliminary negotiation process of DSO R-TWT can be the same as the preliminary negotiation process of the first embodiment shown in FIG21 , and the DSO R-TWT SP process can be shown in FIG29 . Referring to FIG29 , the ninth embodiment is similar to the DSO R-TWT SP scenario of the first embodiment, except that after AP1 enters the SP, it schedules STA1 and STA2 to work on the primary channel at the same time. After AP1 sends a DL MU PPDU, it may not receive a BA from STA1, but may receive a BA from STA2. For this situation where BAs are received from some STAs, AP1 can adopt a special error recovery mechanism. That is, after the PIFS, the STA is re-triggered. The triggering method here can be modified to send a DSO initial control frame ((MU-)RTS frame) on all channels (the channel list negotiated in the early stage) and only trigger STA1. After receiving STA1's response, AP1 can retransmit the PPDU to STA1 on the DSO channel determined in the early negotiation, and send the PPDU to STA2 on the primary channel. After the SP ends, STA1 can decide whether to return to the primary channel according to its own needs.

[0257] Example 10

[0258] In Example 10, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of Example 1 shown in FIG21, and the DSO R-TWT SP process may be shown in FIG30. Referring to FIG30, Example 10 is similar to the DSO R-TWT SP scenario of Example 1, except that after AP1 exchanges one or several PPDUs with STA1 and STA2 on the DSO channel and the main channel determined in the preliminary negotiation, if STA1 does not receive the PHY-RXSTART.indication primitive within the aSIFSTime+aSlotTime+aRxPHYStartDelay time after the response, STA1 may return to the listening mode on the DSO channel determined in the preliminary negotiation. After the SP ends, STA1 can decide whether to return to the main channel according to its own needs.

[0259] Example 11

[0260] In the eleventh embodiment, the early negotiation process of DSO R-TWT can be the same as the early negotiation process of the first embodiment shown in Figure 21, and the DSO R-TWT SP process can be shown in Figure 31. Referring to Figure 31, the eleventh embodiment is similar to the DSO R-TWT SP scenario of the first embodiment, except that after AP1 and STA1 and STA2 have exchanged one or more PPDUs on the DSO channel and the main channel determined in the early negotiation, if STA1 receives a specified frame type (see the rules of STA in DSO R-TWT described above),

[0261] ), STA1 can return to listening mode on the channel determined by the pre-negotiation DS0 after responding to the frame. After the SP ends, STA1 can decide whether to return to the primary channel according to its own needs.

[0262] Example 12

[0263] As shown in Figure 32, in Example 12, STA1 can apply to join AP1's DSO R-TWT and perform R-TWT req. / resp. interaction with AP1. In the R-TWT req. / resp., STA1 and AP1 can interact with DSO operation parameters within the DSO R-TWT (for example, negotiate the DSO channel). After entering the SP, AP1 can simultaneously schedule STA1 and STA2 to work on the main channel (it can be triggered by BSRP or basic trigger. In this embodiment, STAs can all use implicit buffer status report (BSR) reporting method, that is, implicitly transmit BSR in the quality of service (QoS) control field (control field) or BSR control subfield (control subfield) of PPDU and other frames). AP1 did not receive STA1's UL PPDU, but received STA2's UL PPDU. In the case of receiving UL PPDUs from some STAs, AP1 can use a special error recovery mechanism. After the PIFS, AP1 can send a Distributed Solicitation Initial Control Frame ((MU-)RTS frame) on all channels (previously negotiated channel list) to re-trigger STA1. After receiving STA1's response, AP1 triggers the other STA (STA2). Then, AP1 and STA2 simultaneously transmit UL PPDUs on the previously negotiated Distributed Solicitation Channel and the primary channel. After the SP ends, STA1 can decide whether to return to the primary channel as needed.

[0264] Example 13

[0265] Referring to Figure 33 , the DSO R-TWT SP scenarios of Example 13 are similar to those of Example 12. The difference is that the DSO initial control frame in Example 13 can be implemented using BSRP. When AP1 fails to receive data normally after SIFS, AP1 can trigger STA1 and STA2 simultaneously by transmitting the DSO initial control frame on the full channel after PIFS, and then interact with STA1 and STA2 on the previously negotiated DSO channel and the main channel, respectively. After the SP ends, STA1 decides whether to return to the main channel based on its own needs.

[0266] Example 14

[0267] In Example 14, based on the scenario in which STA1 switches back to the primary channel after the DSO frame interaction sequence in Example 12 ends, during the early negotiation process of DSO R-TWT (not shown in the figure), AP1 can set the channel switching indication subfield of the EHT operation element in the R-TWT response to 1, indicating that STA1 can switch back to the primary channel after the DSO frame interaction sequence ends. Referring to Figure 34, the interaction in the first half of the DSO R-TWT SP is the same as the interaction in Example 12 shown in Figure 32. After the DSO frame interaction sequence ends, STA1 may want to switch back to the primary channel because it predicts that the OBSS interference will end based on the statistical information in the previous SP or for other reasons. In this case, STA1 can indicate this requirement in the UL PPDU and feedback relevant information on channel switching such as its own switching delay. Then STA1 can obtain the status of the primary channel by performing CCA on the primary channel, and AP1 can interact with STA1 and STA2 on the primary channel after the switching delay + SIFS time after the corresponding BA. The situation where STA1 fails in prediction and STA1 has no data to transmit after the DSO frame interaction sequence ends is similar to the sixth and seventh embodiments in the DL scenario and is no longer shown in Figure 34.

[0268] Example 15

[0269] In the fifteenth embodiment, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of the twelfth embodiment shown in FIG32, and the DSO R-TWT SP process may be shown in FIG35. Referring to FIG35, the preliminary interaction of the DSO R-TWT SP in the fifteenth embodiment is similar to that in the twelfth embodiment, except that after AP1 sends the DSO initial control frame ((MU-)RTS frame) on all channels (the list of channels negotiated in the preliminary phase), STA1 may not have completed the channel switching and therefore cannot respond to AP1. Then, AP1 may retransmit the DSO initial control frame after PIFS, and the subsequent process after receiving the response from STA1 on the DSO channel determined in the preliminary negotiation is the same as that in the twelve embodiment.

[0270] Example 16

[0271] In Example 16, the preliminary negotiation process of DSO R-TWT may be the same as the preliminary negotiation process of Example 12 shown in FIG32, and the DSO R-TWT SP process may be shown in FIG36. Referring to FIG36, Example 16 is similar to the DSO R-TWT SP scenario of Example 12, except that after AP1 exchanges one or several PPDUs with STA1 and STA2 on the DSO channel and the main channel determined in the preliminary negotiation, if STA1 does not receive the PHY-RXSTART.indication primitive within aSIFSTime+aSlotTime+aRxPHYStartDelay after receiving the control frame that does not require a response, STA1 may return to the listening mode on the DSO channel determined in the preliminary negotiation. After the SP ends, STA1 can decide whether to return to the main channel according to its own needs.

[0272] Example 17

[0273] In Example 17, the preliminary negotiation process of DSO R-TWT can be the same as the preliminary negotiation process of Example 12 shown in Figure 32, and the DSO R-TWT SP process can be shown in Figure 37. Referring to Figure 37, Example 17 is similar to the DSO R-TWT SP scenario of Example 12, except that after AP1 exchanges one or several PPDUs with STA1 and STA2 on the DSO channel and the main channel determined in the preliminary negotiation, if STA1 receives a control frame that requires a response but does not respond, STA1 can return to the listening mode, and AP1 only schedules STA2's transmission on the main channel. After the SP ends, STA1 can decide whether to return to the main channel according to its own needs.

[0274] In the following embodiments 18 to 20, when negotiating the DSO channel during the negotiation of DSO R-TWT, the AP side can use the collision info field of the TWT element. In this case, the AP can not only indicate the negotiated DSO channel through the DSO R-TWT channel (bitmap) field or the PS160 subfield and RU allocation subfield of the EHT variant user info field, but also enhance the channel usage rules within the SP by setting the collision info subfield of the primary channel collision info field. The STA can choose to use the channel according to the meaning of these fields. Depending on the value of the collision info field set by the AP, the STA can perform different operations. The following is an example of DL transmission for three different values.

[0275] Example 18

[0276] In embodiment 18, the AP may set the collision info field of the TWT element to 2. When the STA receives a TWT element with the collision info subfield of the primary channel collision info field set to 2 during the DSO R-TWT negotiation, the STA may give priority to using the negotiated DSO channel in the corresponding DSO R-TWT SP. As shown in Figure 38, the STA may choose to switch the channel to the DSO channel (secondary 20MHz channel) determined in the early negotiation before entering the SP. After AP1 enters the SP, it simultaneously schedules STA1 and STA2 to work on the secondary channel and primary channel determined in the early negotiation, respectively. After the SP ends, STA1 can return to the primary channel if necessary.

[0277] Example 19

[0278] In embodiment 19, the AP may set the collision info field of the TWT element to 1. When the STA receives a TWT element with the collision info subfield of the primary channel collision info field set to 1 during the DSO R-TWT negotiation, the STA may give priority to using the primary channel within the corresponding DSO R-TWT SP, and only when the primary channel cannot be used due to OBSS interference, the STA may use the negotiated DSO channel. The operation in this case is similar to the DL transmission example of embodiment 1 shown in Figure 21.

[0279] Example 20

[0280] In embodiment 20, the AP may set the collision info field of the TWT element to 3. When the STA receives a TWT element with the collision info subfield of the primary channel collision info field set to 3 during the DSO R-TWT negotiation, the STA may give priority to using the negotiated DSO channel within the corresponding DSO R-TWT SP, and if the SP switches back to the primary channel, the negotiated DSO channel may also be used when OBSS interference or other conditions occur on the primary channel, thus having both the operational procedures of setting the field to 1 and 2. During the early negotiation, AP1 sets the channel switching indication subfield of the EHT operation element to 1 in the R-TWT response, indicating that STA1 may switch back to the primary channel after the DSO frame interaction sequence ends. The negotiation process is omitted in FIG39. As shown in Figure 39, before the DSO R-TWT SP starts, STA1 can choose to switch to the secondary channel determined in the early negotiation in advance. When the SP starts, AP1 can send the DSO initial control frame on the full channel. During the DSO frame interaction sequence, AP1 can send PPDU to STA1 on the secondary channel determined in the early negotiation, and at the same time transmit redundant PPDU on the main channel to occupy the main channel. After the DSO frame interaction sequence ends, STA1 can choose to switch back to the main channel and indicate this information to the AP in the BA. Then AP1 and STA1 can interact on the main channel. During the interaction process, STA1 fails to transmit due to OBSS interference on the main channel. Then AP1 can enable the DSO operation process, and subsequent operations are the same as in Example 5. After the SP ends, STA1 can decide whether to return to the main channel according to its own needs.

[0281] Based on the above embodiments, it can be known that the wireless communication method of the embodiment of the present application can enable the communication device to get rid of the dependence on the main 20MHz channel for channel access, and can also use the secondary channel when the main 20MHz channel is busy, which greatly improves the utilization rate of channel resources. In addition, combined with the use of the DSO channel (secondary channel), R-TWT can perform error recovery when the main channel is unavailable due to OBSS interference and other conditions, resulting in transmission failure, and use the DSO channel negotiated when the R-TWT is established to ensure continued data transmission. Moreover, the STA can apply to change the working parameters, such as applying to change the DSO channel used based on the occupancy information of the main channel over a period of time. Based on this, it is beneficial for the AP to interact with the STA in a more appropriate manner, while making the use of the channel more flexible and improving the overall throughput of the network. In addition, the DSO technology, the wireless communication method of the embodiment of the present application can reduce the padding of the first control frame in its operation process to 0, which helps to reduce latency.

[0282] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 39. The device embodiment of the present application is described in detail below in conjunction with Figures 40 to 42. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0283] Figure 40 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The communication device 4000 shown in Figure 40 may be a first AP. The communication device 4000 may include a sending module 4010. The sending module 4010 may be configured to send first information to a first STA. The first information may include a first operating parameter, which may be a sub-channel or sub-band operating parameter used by the first STA during a first predetermined service period.

[0284] In an embodiment of the present application, the above-mentioned communication device 4000 can be used to execute some or all of the method steps executed by the first AP in the above-mentioned method embodiment. For example, the communication device 4000 can be used to execute some or all of the method steps executed by the first AP in the method described above in conjunction with Figures 7 to 39. The communication device 4000 includes units or modules for executing the method steps corresponding to the aforementioned Figures 7 to 39. The method flow has been described in detail in the aforementioned embodiment. The modules in this embodiment have the same functions or perform the same steps, which will not be described here, but those skilled in the art should know. The text descriptions corresponding to the aforementioned Figures 7 to 39 can be introduced into this example and correspond to the modules in the communication device 4000.

[0285] Figure 41 is a schematic diagram of the structure of a communication device according to another embodiment of the present application. The communication device 4100 shown in Figure 41 may be a first STA. The communication device 4100 may include a receiving module 4110, which may be configured to receive first information sent by a first AP. The first information may include a first operating parameter, which may be a sub-channel or sub-band operating parameter used by the first STA during a first predetermined service period.

[0286] In an embodiment of the present application, the above-mentioned communication device 4100 can be used to execute some or all of the method steps executed by the first STA in the above-mentioned method embodiment. For example, the communication device 4100 can be used to execute some or all of the method steps executed by the first STA in the method introduced in conjunction with Figures 7 to 39 above. The communication device 4100 includes units or modules for executing the method steps corresponding to the aforementioned Figures 7 to 39. The method flow has been described in detail in the aforementioned embodiment. The modules in this embodiment have the same functions or perform the same steps, which will not be described here, but those skilled in the art should know. The text descriptions corresponding to the aforementioned Figures 7 to 39 can be introduced into this example and correspond to the modules in the communication device 4100.

[0287] Figure 42 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The dashed lines in Figure 42 indicate that the unit or module is optional. Apparatus 4200 may be used to implement the method described in the above method embodiment. Apparatus 4200 may be a chip, a terminal device, or a network device.

[0288] The device 4200 may include one or more processors 4210. The processor 4210 may support the device 4200 to implement the method described in the above method embodiment. The processor 4210 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 also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0289] The apparatus 4200 may further include one or more memories 4220. The memories 4220 may store programs that can be executed by the processor 4210, causing the processor 4210 to perform the methods described in the above method embodiments. The memories 4220 may be independent of the processor 4210 or integrated into the processor 4210.

[0290] The apparatus 4200 may further include a transceiver 4230. The processor 4210 may communicate with other devices or chips via the transceiver 4230. For example, the processor 4210 may transmit and receive data with other devices or chips via the transceiver 4230.

[0291] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the communication device provided in the present invention, and the program enables a computer to execute the method in each embodiment of the present invention.

[0292] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in the present application, and the program enables a computer to execute the method in each embodiment of the present application.

[0293] The embodiments of the present application also provide a computer program. The computer program can be applied to the communication device provided in the embodiments of the present application, and the computer program enables a computer to execute the methods in the various embodiments of the present application.

[0294] 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).

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0300] 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.

[0301] 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."

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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)).

[0307] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: A first access point AP sends first information to a first station STA, where the first information includes a first operating parameter, where the first operating parameter is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

2. The method according to claim 1, characterized in that The first operating parameter corresponds to dynamic sub-channel or sub-frequency band operation, and the first operating parameter is used to indicate the sub-channel or sub-frequency band that the first AP allows the first STA to use in the first predetermined service period.

3. The method according to claim 1 or 2, characterized in that Before the first AP sends the first information to the first STA, the method includes: The first AP receives second information sent by the first STA, where the second information includes first feedback information, and the first feedback information is used to indicate feedback information of the first STA in a primary channel and / or a secondary channel.

4. The method according to claim 3, characterized in that The first feedback information includes interference information of the primary channel and / or the secondary channel, and the interference information includes interference type information and interference occupancy information.

5. The method according to claim 3 or 4, characterized in that The second information further includes a second operating parameter, where the second operating parameter is used to indicate a sub-channel or sub-frequency band that the first STA desires to use in the first predetermined service period.

6. The method according to any one of claims 1 to 5, characterized in that The first information further includes first indication information, where the first indication information is used to indicate a suggestion by the first AP for the first STA to use a channel in the first predetermined service period.

7. The method according to any one of claims 1 to 6, characterized in that The first information is carried in a first message, and the first message is used to respond to a request to establish the first scheduled service period, or the first message is used to update parameters of the first scheduled service period.

8. The method according to claim 7, characterized in that The first message includes a first element, the first element includes a first field, and the first field is used to carry the first operation parameter.

9. The method according to claim 8, characterized in that The first element also includes a second field, and the second field is used to carry first indication information.

10. The method according to claim 8 or 9, characterized in that The first element further includes a third field, and the third field is used to indicate whether the first field is valid.

11. The method according to claim 10, characterized in that The third field is also used to indicate capability information of the first AP in the first predetermined service period.

12. The method according to any one of claims 9 to 11, characterized in that The first element further includes a fourth field, and the fourth field is used to indicate whether the second field is valid.

13. The method according to any one of claims 3 to 12, characterized in that The second information is carried in a second message, and the second message is used to request establishment of the first predetermined service period.

14. The method according to claim 13, wherein: The second message includes a second element, the second element includes a fifth field, and the fifth field is used to carry the first feedback information.

15. The method according to claim 14, characterized in that The second element also includes a sixth field, and the sixth field is used to carry a second operation parameter.

16. The method according to claim 14 or 15, characterized in that The second element further includes a seventh field, and the seventh field is used to indicate whether the fifth field is valid.

17. The method according to claim 15 or 16, characterized in that The second element further includes an eighth field, and the eighth field is used to indicate whether the sixth field is valid.

18. The method according to any one of claims 7 to 17, characterized in that The method further comprises: After successfully establishing the first scheduled service period, during the first scheduled service period, the first AP exchanges frames with the first STA on the primary channel and / or secondary channel, and the sub-channels or sub-channels corresponding to the primary channel and / or secondary channel are included in the sub-channels or sub-channels corresponding to the first operating parameters indicated by the first message.

19. The method according to claim 18, characterized in that Before the first AP exchanges frames with the first STA on the primary channel and / or the secondary channel, the method further includes: The first AP sends an initial control frame to the first STA, where the initial control frame is used to instruct the first STA to switch to the sub-channel or sub-frequency channel indicated by the first operating parameter.

20. The method according to claim 19, characterized in that The initial control frame includes one or more of the following information: Handover delay information of the first STA; identification information of the first STA; The working sub-channel or sub-frequency band corresponding to the first STA.

21. The method according to claim 19 or 20, characterized in that The initial control frame is a multi-user request to send MU-RTS frame or a buffer status report polling BSRP frame.

22. The method according to any one of claims 1 to 6, characterized in that The first information is carried in the first frame within the first predetermined service period.

23. The method according to claim 22, characterized in that The first frame is generated based on the second frame of the first STA, and the second frame carries first feedback information.

24. The method according to claim 22 or 23, characterized in that The method further comprises: During the first predetermined service period, the first AP exchanges frames with the first STA on the primary channel and / or secondary channel, and the sub-channels or sub-channels corresponding to the primary channel and / or secondary channel are included in the sub-channels or sub-channels corresponding to the first operating parameters indicated by the first frame.

25. The method according to any one of claims 1 to 24, characterized in that The method further comprises: The first AP receives third information sent by the first STA, where the third information is used to indicate that the service period is the first predetermined service period.

26. The method according to claim 25, characterized in that The third information is carried in a third element, the third element is carried in a third message, and the third message is used to request establishment of the first predetermined service period.

27. The method according to any one of claims 1 to 26, characterized in that The method further comprises: The first AP sends fourth information to the first STA, where the fourth information is used to indicate that the service period is the first predetermined service period.

28. The method according to claim 27, characterized in that The fourth information is carried in a fourth element, the fourth element is carried in a fourth message, and the fourth message is used to respond to the request to establish the first predetermined service period.

29. The method according to any one of claims 1 to 28, characterized in that The method further comprises: The first AP sends fifth information to the first STA, where the fifth information is used to indicate whether the first STA needs to switch back to the primary channel when the frame interaction sequence on the secondary channel ends within the first predetermined service period.

30. The method according to claim 29, wherein The fifth information is carried in a fifth element, the fifth element is carried in a fifth message, the fifth message is used to respond to the request to establish the first predetermined service period, or the fifth message is carried in a beacon frame within the first predetermined service period.

31. The method according to any one of claims 1 to 30, characterized in that The method further comprises: The first AP sends sixth information to the first STA, where the sixth information is used to indicate that the first AP supports the first predetermined service period.

32. The method according to claim 31, wherein The sixth information is carried in a sixth element, and the sixth element is carried in a beacon frame within the first predetermined service period.

33. The method according to any one of claims 1 to 32, characterized in that The method further comprises: The first AP receives seventh information sent by the first STA, where the seventh information is used to indicate that the first STA supports the first predetermined service period.

34. The method according to claim 33, wherein The seventh information is carried in a seventh element, and the seventh element is carried in an association request frame or a probe request frame within the first predetermined service period.

35. The method according to any one of claims 1 to 34, characterized in that The method further comprises: During the first scheduled service period, if the first AP transmits data to the first STA on the primary channel, when the first AP does not receive a BA from the first STA for the data, the first AP determines a retransmission mechanism for the data based on whether the first STA switches to the secondary channel.

36. The method according to claim 35, characterized in that The first AP determining a retransmission mechanism of the data according to whether the first STA switches to a secondary channel includes: If the first STA does not switch to the secondary channel, the first AP continues to resend the data to the first STA on the primary channel; If the first STA has switched to the secondary channel, the first AP resends the data to the first STA on the secondary channel.

37. The method according to any one of claims 1 to 36, characterized in that The first predetermined service period is a restricted-target wake-up time R-TWT service period SP.

38. The method according to claim 37, wherein The first information is used to update parameters of the R-TWT SP related to dynamic sub-band / sub-channel operation DSO operation.

39. The method according to claim 38, characterized in that The first information is carried in the R-TWT response message or the R-TWT information frame.

40. The method according to claim 37, wherein The first information is used to update the DSO operating parameters within the R-TWT SP.

41. The method according to claim 40, wherein The first information is carried in a channel state information CSI frame or a data frame within the R-TWT SP.

42. The method according to claim 40 or 41, characterized in that The range of the sub-channel or sub-frequency band indicated by the updated DSO operation parameter is smaller than the range of the sub-channel or sub-frequency band indicated by the parameter of the R-TWT SP.

43. A wireless communication method, characterized in that: include: The first station STA receives first information sent by the first access point AP, where the first information includes a first operating parameter, which is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

44. The method according to claim 43, wherein The first operating parameter corresponds to dynamic sub-channel or sub-frequency band operation, and the first operating parameter is used to indicate the sub-channel or sub-frequency band that the first AP allows the first STA to use in the first predetermined service period.

45. The method according to claim 43 or 44, characterized in that Before the first STA receives the first information sent by the first AP, the method includes: The first STA sends second information to the first AP, where the second information includes first feedback information, and the first feedback information is used to indicate feedback information of the first STA in a primary channel and / or a secondary channel.

46. The method according to claim 45, characterized in that The first feedback information includes interference information of the primary channel and / or the secondary channel, and the interference information includes interference type information and interference occupancy information.

47. The method according to claim 45 or 46, characterized in that The second information further includes a second operating parameter, where the second operating parameter is used to indicate a sub-channel or sub-frequency band that the first STA desires to use in the first predetermined service period.

48. The method according to any one of claims 43 to 47, characterized in that The first information further includes first indication information, where the first indication information is used to indicate a suggestion by the first AP for the first STA to use a channel in the first predetermined service period.

49. The method according to any one of claims 43 to 48, characterized in that The first information is carried in a first message, and the first message is used to respond to a request to establish the first predetermined service period.

50. The method according to claim 49, wherein The first message includes a first element, the first element includes a first field, and the first field is used to carry the first operation parameter.

51. The method according to claim 50, characterized in that The first element also includes a second field, and the second field is used to carry first indication information.

52. The method according to claim 50 or 51, characterized in that The first element further includes a third field, and the third field is used to indicate whether the first field is valid.

53. The method according to claim 52, characterized in that The third field is also used to indicate capability information of the first AP in the first predetermined service period.

54. The method according to any one of claims 51 to 53, characterized in that The first element further includes a fourth field, and the fourth field is used to indicate whether the second field is valid.

55. The method according to any one of claims 45 to 54, characterized in that The second information is carried in a second message, and the second message is used to request establishment of the first predetermined service period.

56. The method according to claim 55, characterized in that The second message includes a second element, the second element includes a fifth field, and the fifth field is used to carry the first feedback information.

57. The method according to claim 56, characterized in that The second element also includes a sixth field, and the sixth field is used to carry a second operation parameter.

58. The method according to claim 56 or 57, characterized in that The second element further includes a seventh field, and the seventh field is used to indicate whether the fifth field is valid.

59. The method according to claim 57 or 58, characterized in that The second element further includes an eighth field, and the eighth field is used to indicate whether the sixth field is valid.

60. The method according to any one of claims 48 to 59, characterized in that The method further comprises: After successfully establishing the first scheduled service period, during the first scheduled service period, the first STA exchanges frames with the first AP on the primary channel and / or secondary channel, and the sub-channels or sub-channels corresponding to the primary channel and / or secondary channel are included in the sub-channels or sub-channels corresponding to the first operating parameters indicated by the first message.

61. The method according to claim 60, characterized in that Before the first STA exchanges frames with the first AP on the primary channel and / or the secondary channel, the method further includes: The first STA receives an initial control frame sent by the first AP, where the initial control frame is used to instruct the first STA to switch to the sub-channel or sub-frequency channel indicated by the first operating parameter.

62. The method according to claim 61, characterized in that The initial control frame includes one or more of the following information: Handover delay information of the first STA; identification information of the first STA; The working sub-channel or sub-frequency band corresponding to the first STA.

63. The method according to claim 61 or 62, characterized in that The initial control frame is a multi-user request to send MU-RTS frame or a buffer status report polling BSRP frame.

64. The method according to any one of claims 43 to 47, characterized in that The first information is carried in the first frame within the first predetermined service period.

65. The method according to claim 64, characterized in that The first frame is generated based on the second frame of the first STA, and the second frame carries first feedback information.

66. The method according to claim 64 or 65, characterized in that The method further comprises: During the first predetermined service period, the first STA exchanges frames with the first AP on a primary channel and / or a secondary channel, and the sub-channels or sub-channels corresponding to the primary channel and / or the secondary channel are included in the sub-channels or sub-channels corresponding to the first operating parameters indicated by the first frame.

67. The method according to any one of claims 43 to 66, characterized in that The method further comprises: The first STA sends third information to the first AP, where the third information is used to indicate that the service period is the first predetermined service period.

68. The method according to claim 67, wherein The third information is carried in a third element, the third element is carried in a third message, and the third message is used to request establishment of the first predetermined service period.

69. The method according to any one of claims 43 to 68, characterized in that The method further comprises: The first STA receives fourth information sent by the first AP, where the fourth information is used to indicate that the service period is the first predetermined service period.

70. The method according to claim 69, wherein The fourth information is carried in a fourth element, the fourth element is carried in a fourth message, and the fourth message is used to respond to the request to establish the first predetermined service period.

71. The method according to any one of claims 43 to 70, characterized in that The method further comprises: The first STA receives fifth information sent by the first AP, where the fifth information is used to indicate whether the first STA needs to switch back to the primary channel when the frame interaction sequence on the secondary channel ends within the first predetermined service period.

72. The method according to claim 71, characterized in that The fifth information is carried in a fifth element, the fifth element is carried in a fifth message, the fifth message is used to respond to the request to establish the first predetermined service period, or the fifth message is carried in a beacon frame within the first predetermined service period.

73. The method according to any one of claims 43 to 72, characterized in that The method further comprises: The first STA receives sixth information sent by the first AP, where the sixth information is used to indicate that the first AP supports the first predetermined service period.

74. The method according to claim 73, characterized in that The sixth information is carried in a sixth element, and the sixth element is carried in a beacon frame within the first predetermined service period.

75. The method according to any one of claims 43 to 74, characterized in that The method further comprises: The first STA sends seventh information to the first AP, where the seventh information is used to indicate that the first STA supports the first predetermined service period.

76. The method according to claim 75, characterized in that The seventh information is carried in a seventh element, and the seventh element is carried in an association request frame or a probe request frame within the first predetermined service period.

77. The method according to any one of claims 43 to 76, characterized in that The first predetermined service period is a restricted-target wake-up time R-TWT service period SP.

78. The method according to claim 77, characterized in that The first information is used to update parameters of the R-TWT SP related to dynamic sub-band / sub-channel operation DSO operation.

79. The method according to claim 78, characterized in that The first information is carried in the R-TWT response message or the R-TWT information frame.

80. The method of claim 77, wherein: The first information is used to update the DSO operating parameters within the R-TWT SP.

81. The method according to claim 80, characterized in that The first information is carried in a channel state information CSI frame or a data frame within the R-TWT SP.

82. The method according to claim 80 or 81, characterized in that The range of the sub-channel or sub-frequency band indicated by the updated DSO operation parameter is smaller than the range of the sub-channel or sub-frequency band indicated by the parameter of the R-TWT SP.

83. A communication device, characterized in that The communication device is a first access point AP, and the communication device includes: The sending module is used to send first information to a first station STA, where the first information includes a first operating parameter, which is a sub-channel or sub-band operating parameter adopted by the first STA during a first predetermined service period.

84. The communication device according to claim 83, characterized in that The first operating parameter corresponds to dynamic sub-channel or sub-frequency band operation, and the first operating parameter is used to indicate the sub-channel or sub-frequency band that the first AP allows the first STA to use in the first predetermined service period.

85. The communication device according to claim 83 or 84, characterized in that The communication device further includes: A receiving module is used to receive second information sent by the first STA before the sending module sends the first information to the first STA, where the second information includes first feedback information, and the first feedback information is used to indicate the first STA's feedback information for the primary channel and / or secondary channel.

86. The communication device according to claim 85, characterized in that The first feedback information includes interference information of the primary channel and / or the secondary channel, and the interference information includes interference type information and interference occupancy information.

87. The communication device according to claim 85 or 86, characterized in that The second information further includes a second operating parameter, where the second operating parameter is used to indicate a sub-channel or sub-frequency band that the first STA desires to use in the first predetermined service period.

88. The communication device according to any one of claims 83 to 87, characterized in that The first information further includes first indication information, where the first indication information is used to indicate a suggestion by the first AP for the first STA to use a channel in the first predetermined service period.

89. The communication device according to any one of claims 83 to 88, characterized in that The first information is carried in a first message, and the first message is used to respond to a request to establish the first predetermined service period.

90. The communication device according to claim 89, wherein The first message includes a first element, the first element includes a first field, and the first field is used to carry the first operation parameter.

91. The communication device according to claim 90, wherein: The first element also includes a second field, and the second field is used to carry first indication information.

92. The communication device according to claim 90 or 91, characterized in that The first element further includes a third field, and the third field is used to indicate whether the first field is valid.

93. The communication device according to claim 92, characterized in that The third field is also used to indicate capability information of the first AP in the first predetermined service period.

94. The communication device according to any one of claims 91 to 93, characterized in that The first element further includes a fourth field, and the fourth field is used to indicate whether the second field is valid.

95. The communication device according to any one of claims 85 to 94, characterized in that The second information is carried in a second message, and the second message is used to request establishment of the first predetermined service period.

96. The communication device according to claim 95, characterized in that The second message includes a second element, the second element includes a fifth field, and the fifth field is used to carry the first feedback information.

97. The communication device according to claim 96, characterized in that The second element also includes a sixth field, and the sixth field is used to carry a second operation parameter.

98. The communication device according to claim 96 or 97, characterized in that The second element further includes a seventh field, and the seventh field is used to indicate whether the fifth field is valid.

99. The communication device according to claim 97 or 98, characterized in that The second element further includes an eighth field, and the eighth field is used to indicate whether the sixth field is valid.

100. The communication device according to any one of claims 88 to 99, characterized in that The sending module is further used for: After successfully establishing the first scheduled service period, during the first scheduled service period, frame exchange is performed with the first STA on the primary channel and / or secondary channel, and the sub-channel or sub-channel corresponding to the primary channel and / or secondary channel is included in the sub-channel or sub-channel corresponding to the first operating parameter indicated by the first message.

101. The communication device according to claim 100, characterized in that The sending module is further used for: Before exchanging frames with the first STA on the primary channel and / or the secondary channel, an initial control frame is sent to the first STA, where the initial control frame is used to instruct the first STA to switch to the sub-channel or sub-frequency channel indicated by the first operating parameter.

102. The communication device according to claim 101, wherein: The initial control frame includes one or more of the following information: Handover delay information of the first STA; identification information of the first STA; The working sub-channel or sub-frequency band corresponding to the first STA.

103. The communication device according to claim 101 or 102, characterized in that The initial control frame is a multi-user request to send MU-RTS frame or a buffer status report polling BSRP frame.

104. The communication device according to any one of claims 83 to 87, characterized in that The first information is carried in the first frame within the first predetermined service period.

105. The communication device according to claim 104, characterized in that The first frame is generated based on the second frame of the first STA, and the second frame carries first feedback information.

106. The communication device according to claim 104 or 105, characterized in that The sending module is further used for: During the first predetermined service period, frames are exchanged with the first STA on a primary channel and / or a secondary channel, and the subchannels or subchannels corresponding to the primary channel and / or the secondary channel are included in the subchannels or subchannels corresponding to the first operating parameters indicated by the first frame.

107. The communication device according to any one of claims 85 to 106, characterized in that The receiving module is further configured to: Receive third information sent by the first STA, where the third information is used to indicate that the service period is the first predetermined service period.

108. The communication device according to claim 107, characterized in that The third information is carried in a third element, the third element is carried in a third message, and the third message is used to request establishment of the first predetermined service period.

109. The communication device according to any one of claims 83 to 108, characterized in that The sending module is further used for: Send fourth information to the first STA, where the fourth information is used to indicate that the service period is the first predetermined service period.

110. The communication device according to claim 109, characterized in that The fourth information is carried in a fourth element, the fourth element is carried in a fourth message, and the fourth message is used to respond to the request to establish the first predetermined service period.

111. The communication device according to any one of claims 83 to 110, characterized in that The sending module is further used for: Fifth information is sent to the first STA, where the fifth information is used to indicate whether the first STA needs to switch back to the primary channel when the frame interaction sequence on the secondary channel ends within the first predetermined service period.

112. The communication device according to claim 111, characterized in that The fifth information is carried in a fifth element, the fifth element is carried in a fifth message, the fifth message is used to respond to the request to establish the first predetermined service period, or the fifth message is carried in a beacon frame within the first predetermined service period.

113. The communication device according to any one of claims 83 to 112, characterized in that The sending module is further used for: Send sixth information to the first STA, where the sixth information is used to indicate that the first AP supports the first predetermined service period.

114. The communication device according to claim 113, characterized in that The sixth information is carried in a sixth element, and the sixth element is carried in a beacon frame within the first predetermined service period.

115. The communication device according to any one of claims 85 to 114, characterized in that The receiving module is further configured to: Receive seventh information sent by the first STA, where the seventh information is used to indicate that the first STA supports the first predetermined service period.

116. The communication device according to claim 115, characterized in that The seventh information is carried in a seventh element, and the seventh element is carried in an association request frame or a probe request frame within the first predetermined service period.

117. The communication device according to any one of claims 83 to 116, characterized in that The communication device also includes a determination module: used to, within the first predetermined service period, if the first AP transmits data to the first STA on the primary channel, when the first AP does not receive the BA of the first STA for the data, determine the retransmission mechanism of the data according to whether the first STA switches to the secondary channel.

118. The communication device according to claim 117, characterized in that The sending module is further used for: If the first STA has not switched to the secondary channel, continue to send the data to the first STA on the primary channel; If the first STA has switched to the secondary channel, the data is sent to the first STA on the secondary channel.

119. The communication device according to any one of claims 83 to 118, characterized in that The first predetermined service period is a restricted-target wake-up time R-TWT service period SP.

120. The communication device according to claim 119, characterized in that The first information is used to update parameters of the R-TWT SP related to dynamic sub-band / sub-channel operation DSO operation.

121. The communication device according to claim 120, characterized in that The first information is carried in the R-TWT response message or the R-TWT information frame.

122. The communication device according to claim 119, wherein The first information is used to update the DSO operating parameters within the R-TWT SP.

123. The communication device according to claim 122, characterized in that The first information is carried in a channel state information CSI frame or a data frame within the R-TWT SP.

124. The communication device according to claim 122 or 123, characterized in that The range of the sub-channel or sub-frequency band indicated by the updated DSO operation parameter is smaller than the range of the sub-channel or sub-frequency band indicated by the parameter of the R-TWT SP.

125. A communication device, characterized in that The communication device is a first station STA, and the communication device includes: The receiving module is configured to receive first information sent by a first access point AP, where the first information includes a first operating parameter, which is a sub-channel or sub-band operating parameter used by the first STA during a first predetermined service period.

126. The communication device according to claim 125, characterized in that The first operating parameter corresponds to dynamic sub-channel or sub-frequency band operation, and the first operating parameter is used to indicate the sub-channel or sub-frequency band that the first AP allows the first STA to use in the first predetermined service period.

127. The communication device according to claim 125 or 126, characterized in that The communication device further includes: A sending module is used to send second information to the first AP before the receiving module receives the first information sent by the first AP, wherein the second information includes first feedback information, and the first feedback information is used to indicate the feedback information of the first STA for the main channel and / or secondary channel.

128. The communication device according to claim 127, characterized in that The first feedback information includes interference information of the primary channel and / or the secondary channel, and the interference information includes interference type information and interference occupancy information.

129. The communication device according to claim 127 or 128, characterized in that The second information further includes a second operating parameter, where the second operating parameter is used to indicate a sub-channel or sub-frequency band that the first STA desires to use in the first predetermined service period.

130. The communication device according to any one of claims 125 to 129, characterized in that The first information further includes first indication information, where the first indication information is used to indicate a suggestion by the first AP for the first STA to use a channel in the first predetermined service period.

131. The communication device according to any one of claims 125 to 130, characterized in that The first information is carried in a first message, and the first message is used to respond to a request to establish the first predetermined service period.

132. The communication device according to claim 131, characterized in that The first message includes a first element, the first element includes a first field, and the first field is used to carry the first operation parameter.

133. The communication device according to claim 132, characterized in that The first element also includes a second field, and the second field is used to carry first indication information.

134. The communication device according to claim 132 or 133, characterized in that The first element further includes a third field, and the third field is used to indicate whether the first field is valid.

135. The communication device according to claim 134, characterized in that The third field is also used to indicate capability information of the first AP in the first predetermined service period.

136. The communication device according to any one of claims 133 to 135, characterized in that The first element further includes a fourth field, and the fourth field is used to indicate whether the second field is valid.

137. The communication device according to any one of claims 127 to 136, characterized in that The second information is carried in a second message, and the second message is used to request establishment of the first predetermined service period.

138. The communication device according to claim 137, characterized in that The second message includes a second element, the second element includes a fifth field, and the fifth field is used to carry the first feedback information.

139. The communication device according to claim 138, characterized in that The second element also includes a sixth field, and the sixth field is used to carry a second operation parameter.

140. The communication device according to claim 138 or 139, characterized in that The second element further includes a seventh field, and the seventh field is used to indicate whether the fifth field is valid.

141. The communication device according to claim 139 or 140, characterized in that The second element further includes an eighth field, and the eighth field is used to indicate whether the sixth field is valid.

142. The communication device according to any one of claims 130 to 141, characterized in that The receiving module is further configured to: After successfully establishing the first scheduled service period, during the first scheduled service period, frames are exchanged with the first AP on the primary channel and / or secondary channel, and the sub-channels or sub-channels corresponding to the primary channel and / or secondary channel are included in the sub-channels or sub-channels corresponding to the first operating parameters indicated by the first message.

143. The communication device according to claim 142, characterized in that The receiving module is further configured to: Before the first STA exchanges frames with the first AP on the primary channel and / or secondary channel, an initial control frame sent by the first AP is received, where the initial control frame is used to instruct the first STA to switch to the subchannel or subfrequency channel indicated by the first operating parameter.

144. The communication device according to claim 143, characterized in that The initial control frame includes one or more of the following information: Handover delay information of the first STA; identification information of the first STA; The working sub-channel or sub-frequency band corresponding to the first STA.

145. The communication device according to claim 143 or 144, characterized in that The initial control frame is a multi-user request to send MU-RTS frame or a buffer status report polling BSRP frame.

146. The communication device according to any one of claims 125 to 129, characterized in that The first information is carried in the first frame within the first predetermined service period.

147. The communication device according to claim 146, characterized in that The first frame is generated based on the second frame of the first STA, and the second frame carries first feedback information.

148. The communication device according to claim 146 or 147, characterized in that The receiving module is further configured to: During the first predetermined service period, frames are exchanged with the first AP on a primary channel and / or a secondary channel, and the subchannels or subchannels corresponding to the primary channel and / or the secondary channel are included in the subchannels or subchannels corresponding to the first operating parameters indicated by the first frame.

149. The communication device according to any one of claims 127 to 148, characterized in that The sending module is further used for: Send third information to the first AP, where the third information is used to indicate that the service period is the first predetermined service period.

150. The communication device according to claim 149, characterized in that The third information is carried in a third element, the third element is carried in a third message, and the third message is used to request establishment of the first predetermined service period.

151. The communication device according to any one of claims 125 to 150, characterized in that The receiving module is further configured to: Receive fourth information sent by the first AP, where the fourth information is used to indicate that the service period is the first predetermined service period.

152. The communication device according to claim 151, characterized in that The fourth information is carried in a fourth element, the fourth element is carried in a fourth message, and the fourth message is used to respond to the request to establish the first predetermined service period.

153. The communication device according to any one of claims 125 to 152, characterized in that The receiving module is further configured to: Receive fifth information sent by the first AP, where the fifth information is used to indicate whether the first STA needs to switch back to the primary channel when the frame interaction sequence on the secondary channel ends within the first predetermined service period.

154. The communication device according to claim 153, characterized in that The fifth information is carried in a fifth element, the fifth element is carried in a fifth message, the fifth message is used to respond to the request to establish the first predetermined service period, or the fifth message is carried in a beacon frame within the first predetermined service period.

155. The communication device according to any one of claims 125 to 154, characterized in that The receiving module is further configured to: Receive sixth information sent by the first AP, where the sixth information is used to indicate that the first AP supports the first predetermined service period.

156. The communication device according to claim 155, characterized in that The sixth information is carried in a sixth element, and the sixth element is carried in a beacon frame within the first predetermined service period.

157. The communication device according to any one of claims 127 to 156, characterized in that The sending module is further used for: Send seventh information to the first AP, where the seventh information is used to indicate that the first STA supports the first predetermined service period.

158. The communication device according to claim 157, characterized in that The seventh information is carried in a seventh element, and the seventh element is carried in an association request frame or a probe request frame within the first predetermined service period.

159. The communication device according to any one of claims 125 to 158, characterized in that The first predetermined service period is a restricted-target wake-up time R-TWT service period SP.

160. The communication device according to claim 159, characterized in that The first information is used to update parameters of the R-TWT SP related to dynamic sub-band / sub-channel operation DSO operation.

161. The communication device according to claim 160, characterized in that The first information is carried in the R-TWT response message or the R-TWT information frame.

162. The communication device according to claim 159, wherein: The first information is used to update the DSO operating parameters within the R-TWT SP.

163. The communication device according to claim 162, characterized in that The first information is carried in a channel state information CSI frame or a data frame within the R-TWT SP.

164. The communication device according to claim 162 or 163, characterized in that The range of the sub-channel or sub-frequency band indicated by the updated DSO operation parameter is smaller than the range of the sub-channel or sub-frequency band indicated by the parameter of the R-TWT SP.

165. A communication device, characterized in that The terminal comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal so that the terminal executes the method according to any one of claims 1 to 42.

166. A communication device, characterized in that It includes a transceiver, a memory and a processor, the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method as described in any one of claims 43-82.

167. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to cause the device to execute the method according to any one of claims 1-42 or 43-82.

168. A chip, characterized in that: The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 42 or 43 to 82.

169. 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 1-42 or 43-82.

170. A computer program product, characterized in that A program is included, which causes a computer to execute the method according to any one of claims 1-42 or 43-82.

171. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1-42 or 43-82.

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