WO2024031687A1

WO2024031687A1 - Method and apparatus for using channel, and device and storage medium

Info

Publication number: WO2024031687A1
Application number: PCT/CN2022/112275
Authority: WO
Inventors: 周培; 黄磊
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-02-15

Abstract

Provided in the embodiments of the present application are a method and apparatus for using a channel, and a device and a storage medium. The method comprises: when determining that a first transmission opportunity for a primary channel is terminated, a first node sending a first frame on a secondary channel, wherein the first frame is used for indicating that a second transmission opportunity for the secondary channel is terminated.

Description

Channel usage method, device, equipment and storage medium

Technical field

The embodiments of the present application relate to the field of mobile communication technology, and specifically relate to a channel usage method, device, equipment, and storage medium.

Background technique

Wireless fidelity (WIFI) can occupy up to multiple channels in the frequency domain, including a primary channel and multiple secondary channels. The secondary channels collectively refer to channels other than the primary channel. In the busy time scenario of the primary channel, when the primary channel is busy, if the secondary channel is idle, the secondary channel can be used for data transmission. In a scenario where the busy time of the primary channel is unknown, the communication device cannot determine the usage duration of the secondary channel.

Contents of the invention

Embodiments of the present application provide a channel usage method, device, equipment, and storage medium.

The embodiment of this application provides a channel usage method, including:

The first node determines that the first transmission opportunity of the primary channel is terminated, and then sends a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

The embodiment of this application provides a channel usage method, including:

The second node receives a first frame on the secondary channel, determines based on the first frame that the second transmission opportunity of the secondary channel is terminated, and the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

The embodiment of this application provides a channel usage method, including:

After sending the fourth physical layer protocol data unit PPDU on the secondary channel, the first node detects whether the first transmission opportunity of the primary channel is terminated; if the first transmission opportunity of the primary channel is terminated, the second transmission opportunity of the secondary channel The transfer opportunity was terminated.

An embodiment of the present application provides a channel usage device, including:

The first communication unit is configured to determine that the first transmission opportunity of the primary channel is terminated, and then send a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

A second communication unit configured to receive a first frame on the secondary channel and determine that the second transmission opportunity of the secondary channel is terminated based on the first frame, the first frame being used to indicate the second transmission of the secondary channel. Opportunity terminated.

The detection unit is configured to detect whether the first transmission opportunity of the primary channel is terminated after sending the fourth physical layer protocol data unit PPDU on the secondary channel; if the first transmission opportunity of the primary channel is terminated, the secondary channel The second transmission opportunity is terminated.

The communication device provided by the embodiment of the present application may be the first node in the above solution or the second node in the above solution. The communication device includes a processor and a memory. The memory is used to store computer programs, and the processor is used to call and run the computer programs stored in the memory to execute the above channel usage method.

The chip provided by the embodiment of this application is used to implement the above channel usage method.

Specifically, the chip includes: a processor, configured to call and run a computer program from a memory, so that the device installed with the chip executes the above-mentioned channel usage method.

The computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program causes the computer to execute the above channel usage method.

The computer program product provided by the embodiment of the present application includes computer program instructions, which cause the computer to execute the above channel usage method.

The computer program provided by the embodiment of the present application, when run on a computer, causes the computer to execute the above channel usage method.

Through the above technical solution, when it is determined that the transmission opportunity of the primary channel is terminated, the transmission opportunity of the secondary channel is synchronously terminated through the sending of the first frame on the secondary channel, so that the duration of the transmission opportunity of the secondary channel is consistent with that of the primary channel. The duration of the transmission opportunity is terminated synchronously, so that the usage duration of the secondary channel is as close as possible to the actual usage duration of the primary channel, maintaining fairness to other devices using the secondary channel.

Description of drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 is a schematic diagram of the application scenario of the embodiment of the present application;

Figure 2 is an optional schematic diagram of a channel usage method according to an embodiment of the present application;

Figure 3 is an optional schematic diagram of a channel usage method according to an embodiment of the present application;

Figure 4 is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 5 is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 6 is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 7 is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 8A is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 8B is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 8C is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 8D is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 9 is an optional flow diagram of a channel usage method according to an embodiment of the present application;

Figure 10 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 11 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 12 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 13 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 14 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 15 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 16 is an optional schematic diagram of NAV reset according to the embodiment of the present application;

Figure 17 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 18 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 19 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 20 is a schematic diagram of an optional composition of the first BK frame in this embodiment of the present application;

Figure 21 is a schematic diagram of an optional composition of the service field in this embodiment of the present application;

Figure 22 is a schematic diagram of an optional composition of a QoS empty data frame in this embodiment of the present application;

Figure 23 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 24 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 25 is a schematic diagram of an optional composition of a transmission opportunity end frame according to an embodiment of the present application;

Figure 26 is a schematic diagram of the optional composition of the A-control field in this embodiment of the present application;

Figure 27 is an optional flow diagram of the channel usage method according to the embodiment of the present application;

Figure 28 is an optional structural schematic diagram of a channel usage device according to an embodiment of the present application;

Figure 29 is an optional structural schematic diagram of a channel usage device according to an embodiment of the present application;

Figure 30 is an optional structural schematic diagram of a channel usage device according to an embodiment of the present application;

Figure 31 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 32 is a schematic structural diagram of a chip according to an embodiment of the present application;

Figure 33 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Figure 1 is a schematic diagram of an application scenario according to the embodiment of the present application.

As shown in Figure 1, the communication system 100 may include: an access point (AP) 10 and a non-AP station (STA) 20. The AP 10 and the non-AP 20 belong to different nodes in the communication system 100. Among them, the AP 10 is an electronic device that can form a wireless LAN 30 based on the transmitted signal, such as a router, a mobile phone with a hotspot function, etc., and the Non-AP 20 is an electronic device that is connected to the wireless LAN 30 formed by the AP 10, such as : Mobile phones, smart washing machines, air conditioners, electronic locks and other equipment. Non-AP 20 and AP 10 communicate through wireless LAN 30.

One channel or multiple channels can be used for communication between AP and Non-AP. In the embodiment of this application, AP10 and Non-AP20 may be terminal equipment, and the terminal equipment may refer to an access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, or remote terminal. , mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a device with wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5th generation (5G) networks or future evolved Public Land Mobile networks (Public Land Mobile Network, PLMN) terminal equipment, etc.

In the communication system 100 shown in Figure 1, the wireless communication system 100 may also include a network device, and the network device may be an access network device that communicates with the terminal device. Access network equipment can provide communication coverage for a specific geographical area and can communicate with terminal equipment located within the coverage area.

The network equipment can be an evolutionary base station (Evolutional Node B, eNB or eNodeB) in the Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) equipment, or It is a base station (gNB) in the NR system, or a wireless controller in the Cloud Radio Access Network (CRAN), or the network device 120 can be a relay station, access point, vehicle-mounted device, or wearable device , hubs, switches, bridges, routers, or network equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.

In the communication system 100 shown in Figure 1, the wireless communication system 100 may also include a core network device that communicates with a base station. The core network device may be a 5G core network (5G Core, 5GC) device, such as an access and mobile device. Access and Mobility Management Function (AMF), for example, Authentication Server Function (AUSF), for example, User Plane Function (UPF), for example, Session Management Function (Session Management Function) Function, SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of the LTE network, for example, a session management function + core network data gateway (Session Management Function + Core Packet Gateway, SMF + PGW- C) Equipment. It should be understood that SMF+PGW-C can simultaneously realize the functions that SMF and PGW-C can realize. In the process of network evolution, the above-mentioned core network equipment may also be called by other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited by the embodiments of this application.

Figure 1 exemplarily shows one AP and one Non-AP. Optionally, the wireless communication system 100 may include multiple Non-APs, or only multiple Non-APs. The embodiments of the present application do not limit this.

It should be noted that FIG. 1 only illustrates the system to which the present application is applicable in the form of an example. Of course, the method shown in the embodiment of the present application can also be applied to other systems. Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship. It should also be understood that the "instruction" mentioned in the embodiments of this application may be a direct instruction, an indirect instruction, or an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed. , configuration and configured relationship. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be achieved by pre-saving corresponding codes, tables or other information in the device (for example, including the first node and the second node). It can be implemented by indicating relevant information, and this application does not limit its specific implementation. For example, predefined can refer to what is defined in the protocol. It should also be understood that in the embodiments of this application, the "protocol" may refer to a standard protocol in the communication field, which may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems. This application does not limit this. .

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following related technologies can be optionally combined with the technical solutions of the embodiments of the present application, and they all belong to the embodiments of the present application. protected range.

A Basic Service Set (BSS) describes a group of communication devices that communicate with each other in a Wireless Local Area Network (WLAN). It may or may not include an Access Point (AP). AP.

The two Network Allocation Vectors (NAV) in the protocol are defined as follows:

The STA will maintain two NAVs, and the AP will maintain two NAVs: NAV within the BSS (intra-BSS NAV) and basic NAV (basic NAV). The NAV inside the BSS is updated through the physical layer protocol data unit (PHY Protocol Data Unit, PPDU) inside the BSS. Basic NAV is updated through inter-BSS PPDU or PPDU that cannot perform intra-BSS and inter-BSS classification.

The NAV inside the BSS corresponds to the BSS internal NAV timer, and the basic NAV corresponds to the basic NAV timer. In the case where the site maintains two NAVs, if the values of both NAV timers are 0, the virtual carrier sense (CS) indicates that the medium (medium) is idle; if at least one of the two NAV timers is If a timer value is non-zero, virtual carrier sensing indicates that the medium is busy.

The above NAV definition does not clarify whether the NAV definition is for the primary channel or the secondary channel, which makes the rules for the use of secondary channels unclear and causes confusion when using the primary and secondary channels.

Rules for using secondary channels include:

Rule 1. WIFI can occupy up to multiple channels in the frequency domain, including one primary channel and multiple secondary channels. The secondary channels collectively refer to channels other than the primary channel. The rules for using secondary channels are: Primary channel idle channel evaluation ( Clear Channel Assessment (CCA) is detected as idle, and the CCA result of Point Interframe Space (PIFS) PIFS will be checked on the secondary channel. If the secondary channel is also idle, then the secondary channel can follow the primary channel. use together.

For Rule 1, if the main channel CCA detects that it is busy, the secondary channel cannot be used, and the transmission opportunity (TXOP) of the secondary channel is wasted. The transmission opportunity belongs to (frequency domain resources), so frequency domain resources are wasted.

Rule 2: In subchannel selective transmission (SST), the STA chooses the best 1MHz, 2MHz, 4MHz, 8MHz, and 16MHz channels to communicate with the S1G AP to avoid some fading channels. For SST operation, the STA can work alone on the secondary channel, but the primary channel needs to be available and always in use. The SST mechanism of Rule 2 still does not break away from the limitation that if the primary channel CCA detects that it is busy, the secondary channel cannot be used.

Rule 3: When the primary channel is busy, the STA performs CCA on other channels of the operating bandwidth and transmits on the channel that successfully completes CCA. When the primary channel is busy, any transmission on the non-primary channel should end at the same time. This is possible when the PPDU length and/or NAV information is known for the BUSY primary channel. When the duration for which the primary channel is busy is unknown, the STA uses the secondary channel anyway and periodically polls the primary channel while transmitting short bursts on the secondary channel.

For rule three, the usage time of the secondary channel should be consistent with the busy end time of the primary channel. If it is inconsistent, it will affect the use of the secondary channel by other STAs. For example: when a certain STA's main channel is busy, it occupies the secondary channel for a long time, but other STAs do not know the usage of the secondary channel and cannot use the secondary channel, thereby reducing the chance of other STAs using the secondary channel and occupying the secondary channel. The secondary channel serves as a channel access opportunity for other overlapping Basic Service Set (OBSS) STAs of the primary channel.

Rule 3 considers the scenario where the busy time of the primary channel is known, but does not consider how the usage duration of the secondary channel should be modified if the busy time of the primary channel is reset, that is, the duration of the primary channel is modified, so as to allow the secondary channel to be used as much as possible. The usage duration of the channel is close to the actual usage duration of the primary channel, maintaining fairness to other devices using the secondary channel.

Specifically, for a busy main channel, the PPDU length and/or NAV information is known, but the NAV of the main channel is reset. At this time, the usage duration of the main channel is unknown, so there is a problem with the use of the secondary channel. . As shown in Figure 2, the busy time of the AP main channel is known to be T0. The AP will set the NAV/duration field of the secondary channel to be less than or equal to T0. As shown in Figure 3, the main channel sends Contention-Free End at time T1. , CF-End) frame, the NAV of the primary channel is reset immediately, and the primary channel is available (available) that is, idle. At this time, the usage duration of the primary channel has been updated. If the usage duration (or NAV) of the secondary channel is not updated, , the PPDU sent on this channel may exceed the updated main channel busy time (ie T1), which may cause unfairness to other STAs.

Therefore, the related technology does not consider how to modify the usage time of the secondary channel after the busy time of the main channel is terminated, so as to make the usage time of the secondary channel as close as possible to the actual usage time of the main channel, and maintain the safety of other devices. Fairness using secondary channels.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application. The embodiments of this application include at least part of the following contents.

Figure 4 is a channel usage method provided by an embodiment of the present application, applied to the first node, as shown in Figure 4, including:

S401. The first node determines that the first transmission opportunity of the primary channel is terminated, and then sends a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

Figure 5 is a channel usage method provided by an embodiment of the present application, applied to the second node, as shown in Figure 5, including:

S501. The second node receives the first frame on the secondary channel, and determines that the second transmission opportunity of the secondary channel is terminated based on the first frame. The first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated. termination.

Figure 6 is a channel usage method provided by an embodiment of the present application, applied to a wireless communication system including a first node and a second node. As shown in Figure 6, it includes:

S601. The first node determines that the first transmission opportunity of the primary channel is terminated, and then sends a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

S602. The second node receives the first frame on the secondary channel.

S603. The second node determines that the second transmission opportunity of the secondary channel is terminated based on the first frame.

Next, the channel usage method provided by the embodiment of the present application will be further described.

In this embodiment of the present application, the first node uses the secondary channel to communicate with other nodes.

Optionally, the second transmission opportunity of the secondary channel is used for communication between the first node and the second node, that is, the first node and the second node are users of the secondary channel and can communicate through the secondary channel. Optionally, the first node is a transmission opportunity holder (holder) of the secondary channel, and the second node is a transmission opportunity responder (responder) of the secondary channel. Optionally, the second node is a transmission opportunity holder (holder) of the secondary channel, and the first node is a transmission opportunity responder (responder) of the secondary channel.

The first node and the second node are each a node in the BSS, and the node may be an access point (AP) or a station (STA). It can be understood that the first node and the second node include at most one AP.

Optionally, the first transmission opportunity of the main channel is used for communication between the first node and the third node, or the main channel is used for communication between the second node and the third node.

Taking the first transmission opportunity of the main channel for communication between the first node and the third node as an example, the first node and the third node are the users of the main channel, and the first node and the third node can Frames are transmitted over the channel. Optionally, the first node serves as the transmission opportunity maintaining end of the primary channel, and the third node serves as the transmission opportunity responding end of the secondary channel. Optionally, the third node is the transmission opportunity maintaining end of the primary channel, and the first node is the transmission opportunity responding end of the secondary channel.

If the first transmission opportunity of the main channel is used for communication between the first node and the third node, the first node and the third node determine the usage duration of the main channel based on the duration of the first transmission opportunity of the main channel. At this time, the first node and the third node respectively maintain the NAV of the main channel, and the NAV is 0. The second node maintains the NAV of the main channel, and the size of the NAV is the same as the duration of the first transmission opportunity of the main channel.

Taking the first transmission opportunity of the main channel for communication between the second node and the third node as an example, the third node is another node in the BSS where the first node and the second node are located, and the second node and the third node The three nodes are the users of the main channel, and the second node and the third node can transmit frames on the main channel. Optionally, the second node serves as the transmission opportunity maintaining end of the primary channel, and the third node serves as the transmission opportunity responding end of the secondary channel. Optionally, the third node is the transmission opportunity maintaining end of the primary channel, and the second node is the transmission opportunity responding end of the secondary channel.

If the first transmission opportunity of the main channel is used for communication between the second node and the third node, the second node and the third node determine the usage duration of the main channel through the duration of the first transmission opportunity of the main channel, and the first The node determines the usage duration of the main channel by maintaining the NAV value of the main channel, and the size of the NAV of the main channel maintained by the first node is the same as the duration of the first transmission opportunity of the main channel.

In the embodiment of the present application, the first transmission opportunity of the main channel can also be used for communication between the first node and the second node. In this case, the first transmission opportunity of the main channel and the secondary channel are used between the first node and the second node. second transmission opportunity for communication.

It can be understood that in the embodiment of the present application, when the two nodes communicating are both stations, the transmission opportunity may be used for P2P transmission.

Optionally, the first node may have capability one, or may not have capability one. Capability one refers to the ability to perform CCA and/or monitor channels on the primary channel and the secondary channel at the same time.

In the case where the first node does not have capability one, the first node can only perform CCA and/or monitor the channel in a time-sharing manner on the primary channel and the secondary channel.

When the first node determines that the first transmission opportunity of the primary channel is terminated, it considers that the current primary channel has been terminated, and then sends the first frame to the second node on the secondary channel, and the second node receives the first frame on the secondary channel. One frame, the duration of the second transmission opportunity to terminate the secondary channel based on the indication of the first frame. It can be understood that the termination of the second transmission opportunity of the secondary channel can be understood as the duration of the second transmission opportunity being reset to 0.

Optionally, the first frame is a CF-End frame.

The channel usage method provided by the embodiment of the present application, when it is determined that the transmission opportunity of the primary channel is terminated, the transmission opportunity of the secondary channel is synchronously terminated by sending the first frame on the secondary channel, thereby making the transmission opportunity of the secondary channel The duration is terminated synchronously with the duration of the transmission opportunity of the primary channel, so that the usage duration of the secondary channel is as close as possible to the actual usage duration of the primary channel, maintaining fairness to other devices using the secondary channel.

In some embodiments, the second transmission opportunity of the secondary channel is terminated after the first frame is sent.

After completing the transmission of the first frame, the first node terminates the second transmission opportunity of the secondary channel. After completing the reception of the first frame, the second node terminates the second transmission opportunity of the secondary channel, thereby realizing synchronization of the duration of the second transmission opportunity of the secondary channel between the first node and the second node.

In an example, as shown in Figure 7, the main channel is used for communication between the second node and the third node. When the first node determines that the first transmission opportunity of the main channel is terminated, it sends a frame to the second node. 701, the frame 701 is used to indicate that the second transmission opportunity of the secondary channel is terminated, and the first node considers the secondary channel to be idle after completing the transmission of the frame 701. After completing the reception of frame 701, the second node considers the secondary channel to be idle.

In some embodiments, the first node determines that the first transmission opportunity of the primary channel is terminated by:

Method 1: Receive the second frame on the main channel;

Method 2: Actively terminate and send the second frame on the main channel;

Method 3: The third frame is received on the secondary channel.

The second frame is used to indicate that the first transmission opportunity of the main channel is terminated. Optionally, the second frame is a contention-free CF-End frame.

The third frame is used to request to send the first frame. It can be understood that the third frame is used to request the first node to terminate the second transmission opportunity of the main channel.

For mode 1, the first node receives a second frame on the main channel, determines based on the second frame that the first transmission opportunity of the main channel is terminated, and the second frame is used to indicate that the The first transmission opportunity of the main channel is terminated.

In method 1, the first node receives the second frame sent by the second node or the third node on the primary channel, sends the first frame to the second node on the secondary channel, and the second node receives the first frame. The first node may be a transmission opportunity responding end of the secondary channel, or may be a transmission opportunity maintaining end of the secondary channel.

The first node determines that the first transmission opportunity for the primary channel is terminated based on the second frame received on the primary channel.

The first transmission opportunity of the main channel may be used for communication between the first node and the third node or communication between the second node and the third node or communication between the first node and the second node.

If the first transmission opportunity of the main channel is used for communication between the first node and the third node, the third node actively terminates the first transmission opportunity of the main channel, sends the second frame to the first node, and the first node receives The second frame sent by the third node.

For the third node, the third node sends a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

Optionally, the third node serves as the transmission opportunity maintenance end of the main channel.

As shown in Figure 8A, the third node sends a second frame to the first node on the main channel, the first node receives the second frame on the main channel, and the first node determines the third frame of the main channel based on the received second frame. A transmission opportunity is terminated and the first frame is sent to the second node on the secondary channel.

In an example, the second transmission opportunity of the secondary channel is used for communication between the first node STA1 and the second node STA2, and the first transmission opportunity of the main channel is used for communication between STA1 and the third node STA3. STA3 is If the primary channel has a transmission opportunity holder, STA3 sends the second frame to STA1 on the primary channel, STA1 receives the second frame on the primary channel, and STA1 sends the first frame to STA2 on the secondary channel. At this time, STA1 is the transmission opportunity maintaining end of the secondary channel or the transmission opportunity responding end of the secondary channel.

In an example, the second transmission opportunity of the secondary channel is used for communication between the first node AP and the second node STA2, and the first transmission opportunity of the main channel is used for communication between the AP and the third node STA3. STA3 is The transmission opportunity holder of the primary channel, then STA3 sends the second frame to the AP on the primary channel, the AP receives the second frame on the primary channel, and the AP sends the first frame to STA2 on the secondary channel. At this time, the AP is the transmission opportunity sustainer of the secondary channel or the transmission opportunity responder of the secondary channel.

If the first transmission opportunity of the main channel is used for communication between the first node and the second node, the second node actively terminates the first transmission opportunity of the main channel, sends the second frame to the first node, and the first node receives The second frame sent by the second node.

For the second node, the second node sends a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

In an example, the first transmission opportunity of the primary channel is used for communication between the first node STA1 and the second node STA2, the secondary channel is the communication between the first node STA1 and the second node STA2, and STA2 is the primary channel. transmission opportunity holder, then STA2 sends the second frame to STA1 on the primary channel, STA1 receives the second frame on the primary channel, and STA1 sends the first frame to STA2 on the secondary channel. At this time, STA1 is the transmission opportunity maintaining end of the secondary channel or the transmission opportunity responding end of the secondary channel.

If the first transmission opportunity of the main channel is used for communication between the second node and the third node, and the first node receives the second frame sent by the second node or the third node on the main channel through the CCA or the listening channel, the first node A node determines that the first transmission opportunity for the primary channel is terminated based on the second frame.

Optionally, the second node receives a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated. At this time, the third node is the transmission opportunity maintaining end of the main channel, and the second node is the transmission opportunity responding end of the main channel.

Optionally, the second node actively terminates the first transmission opportunity of the main channel and sends a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated. At this time, the second node is the transmission opportunity maintaining end of the main channel, and the third node is the transmission opportunity responding end of the main channel.

If the first transmission opportunity of the main channel is used for communication between the second node and the third node, the first node receives the second frame sent by the second node or the third node when it has capability one.

Optionally, the first node is a maintenance end or a transmission opportunity response end of the transmission opportunity of the secondary channel.

As shown in Figure 8B, there is a second frame on the primary channel between the second node and the third node. The first node receives the frame on the primary channel based on the ability to perform CCA or monitor the channel on the primary channel and secondary channel simultaneously. In the second frame, the first node sends the first frame to the second node on the secondary channel, and the second node receives the first frame on the secondary channel.

In an example, the second transmission opportunity of the secondary channel is used for communication between the first node AP and the second node AP, and the first transmission opportunity of the main channel is used for communication between the second node AP and the third node STA3 , the AP is the transmission opportunity holder of the main channel, then the AP sends the second frame to STA3 on the main channel, and STA1 receives the second frame on the main channel based on the ability to perform CCA or monitor the channel on the main channel and the secondary channel at the same time. , STA1 sends the first frame to the AP on the secondary channel, and the AP receives the first frame on the secondary channel. At this time, STA1 is the transmission opportunity maintaining end or the transmission opportunity responding end of the secondary channel.

In an example, the second transmission opportunity of the secondary channel is used for communication between the first node STA1 and the second node STA2, and the first transmission opportunity of the main channel is used for communication between the second node STA2 and the third node STA3. , STA2 is the transmission opportunity holder of the main channel, then STA2 sends the second frame to STA3 on the main channel, and STA1 receives the second frame on the main channel based on the ability to perform CCA or monitor the channel on the main channel and the secondary channel at the same time. , STA1 sends the first frame to STA2 on the secondary channel, and STA2 receives the first frame on the secondary channel. At this time, STA1 is the transmission opportunity maintaining end or the transmission opportunity responding end of the secondary channel.

In method 1, after receiving the second frame, the first node resets the maintained NAV of the main channel to 0, and the main channel is idle.

For the second method, the first node actively terminates the first transmission opportunity of the main channel, thereby determining that the first transmission opportunity of the main channel is terminated.

In the second method, the first transmission opportunity of the main channel is used for communication between the first node and the third node or the communication between the first node and the second node, and the first node maintains the transmission opportunity of the main channel. , the first node actively terminates the first transmission opportunity of the main channel.

If the first node actively terminates the first transmission opportunity of the main channel, the first node sends a second frame on the main channel, and the second frame is used to indicate that the first transmission opportunity of the main channel is terminated. termination.

If the first transmission opportunity of the main channel is used for communication between the first node and the third node, the first node actively terminates the first transmission opportunity of the main channel and sends the second frame to the third node, and the third node A second frame is received on the main channel, and the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

As shown in Figure 8C, the first node actively terminates the first transmission opportunity of the main channel, the first node sends the second frame to the third node on the main channel, and sends the first frame to the second node on the secondary channel. The third node receives the second frame on the primary channel and the second node receives the first frame on the secondary channel.

If the first transmission opportunity of the main channel is used for communication between the first node and the second node, and the first node is the maintenance end of the transmission opportunity of the main channel, the first node actively terminates the first transmission opportunity of the main channel, Send a second frame to the second node, and the second node sends the first frame on the secondary channel, the second frame is used to indicate that the first transmission opportunity of the primary channel is terminated, and the second node receives the first frame The second frame sent by the first node is received on the secondary channel.

In an example, the first transmission opportunity of the primary channel is used for communication between the first node STA1 and the second node STA2, and the second transmission opportunity of the secondary channel is the communication between the first node STA1 and the second node STA2, STA1 is the transmission opportunity holder of the primary channel, then STA1 sends the second frame to STA2 on the primary channel, and STA1 sends the first frame to STA2 on the secondary channel.

For mode three, the first node receives a third frame on the secondary channel and determines that the first transmission opportunity of the primary channel is terminated based on the third frame. The third frame is used to request the first The node sends the first frame, and the third frame is also used to determine that the first transmission opportunity of the main channel is terminated.

In mode three, for the second node, the second node sends a third frame on the secondary channel, and the third frame is used to request the first node to send the first frame.

Here, the first transmission opportunity of the main channel is used for communication between the second node and the third node, and the first node does not have capability one.

As shown in Figure 8D, the second node determines that the first transmission opportunity is terminated and sends the third frame to the first node on the secondary channel. The first node receives the third frame on the secondary channel. After receiving the third frame, the first node After the frame, the first frame is sent to the second node on the secondary channel, and the second node receives the first frame sent by the first node on the secondary channel. Optionally, the first node is the transmission opportunity maintaining end of the secondary channel.

As shown in FIG. 8D, the second node may determine that the first transmission opportunity of the primary channel is terminated based on the second frame transmitted on the primary channel.

In an example, the first transmission opportunity of the primary channel is used for communication between the second node AP and the third node STA3, and the second transmission opportunity of the secondary channel is used for communication between the second node AP and the first node STA1. , STA1 does not have the capability 1. STA3 sends a second frame to the AP to indicate the termination of the first transmission opportunity of the main channel. The AP determines that the first transmission opportunity of the main channel is terminated based on the received second frame, and then the maintained main channel is NAV is set to 0, and the AP sends the third frame to STA1 on the secondary channel to request STA1 to send the first frame. The first node STA1 sends the first frame to the AP on the secondary channel based on the third frame to indicate the termination of the secondary channel. second transmission opportunity.

In an example, the first transmission opportunity of the primary channel is used for communication between the second node STA2 and the third node STA3, and the second transmission opportunity of the secondary channel is used for communication between STA2 and the first node STA1. STA1 is not With capability 1, STA3 sends a second frame to STA2 to indicate the termination of the first transmission opportunity of the main channel. STA2 determines that the first transmission opportunity of the main channel is terminated based on the received second frame, and sets the NAV of the maintained main channel to 0. , and STA2 sends the third frame to STA1 on the secondary channel to request STA1 to send the first frame. The first node STA1 sends the first frame to STA2 on the secondary channel based on the third frame to indicate the termination of the second frame of the secondary channel. Transmission opportunities.

Optionally, the third frame is sent to the first node after the second node receives or sends a second frame on the main channel, and the second frame is used to indicate the first transmission of the main channel. The opportunity duration is terminated.

Here, in the case where the second node sends the second frame to the third node on the main channel or receives the second frame sent by the third node on the main channel, the second node determines that the first transmission opportunity of the main channel is terminated.

In method three, after receiving the third frame, the first node resets the maintained NAV of the main channel to 0 and considers the main channel to be idle.

In some embodiments, the third frame includes one of the following:

First block acknowledgment (BlockAck, BA) frame, first acknowledgment ACK frame, reverse protocol allowed frame, CF-End frame.

The first BA frame is a modified BA frame based on the BA frame in the protocol. The first ACK frame is a modified ACK frame based on the ACK frame in the protocol. The frames allowed by the reverse protocol are when the reverse protocol of the secondary channel is turned on. The CF-End frame is a frame sent by the second node as the secondary channel's transmission opportunity response end to the first node as the secondary channel's transmission opportunity maintenance end. The CF-End frame is transmitted by the second node as the secondary channel's transmission opportunity response end to the secondary channel. The opportunity to maintain the frame sent by the first node was sent.

For the first block acknowledgment BA frame

The first BA frame includes first indication information, and the first indication information is used to request the first node to terminate the use of the secondary channel.

The first BA frame requests the first node to terminate the second transmission opportunity of the secondary channel based on the first indication information.

Optionally, the first indication information is located in a reserved bit in the BA control field of the first BA frame.

In the first BA frame, use B0 of the reserved bits in the BA Control field (BA Control field) or any one of the bits B5 to B8 defined as the first indication information to indicate the request to terminate the second transmission opportunity. For example: Set B5 in the BlockAck frame to 1.

For the first ACK frame

The first PPDU carrying the first ACK frame carries second indication information, and the second indication information is used to request the first node to terminate the use of the secondary channel.

The first ACK frame requests the first node to terminate the second transmission opportunity of the secondary channel based on the second indication information.

Optionally, the first PPDU may include at least one of the following: non-HT PPDU, non-HT duplicate PPDU, HT PPDU, VHT PPDU, HE PPDU or EHT PPDU.

Optionally, the second indication information is located in a reserved bit of the service field in the data field of the first PPDU.

Taking the first PPDU as an HE PPDU as an example, B7~B15 of the service field (SERVICE field) are reserved bits, then you can use the reserved bits in the reserved bits B7~B15 (can be any bit, such as B9) as Second instruction information.

Frames allowed for the reverse protocol

The frames allowed by the reverse protocol can be understood as management frames or empty data frames sent by the transmission opportunity responder to the transmission opportunity sustainer based on the reverse protocol.

The frames allowed by the reverse protocol include at least one of the following: an end of transmission opportunity frame and a (quality of service) null data frame (QoS) Null frame carrying control information.

Optionally, the frame body of the transmission opportunity end frame is empty or set information.

The frame body field is used for transmitted information. When the content in the frame body field of the end of transmission opportunity frame is empty or setting information, the frame is an end of transmission opportunity frame.

In an example, the transmission opportunity end frame may include the following fields: a frame control field, a duration field, a receiving address field, a sending address field, a frame body field, and a frame check sequence (FCS) field. .

Optionally, the (QoS) Null frame carries third indication information, and the third indication information is used to request the first node to terminate the second transmission opportunity of the secondary channel.

The (QoS) Null frame requests the first node to terminate the second transmission opportunity of the secondary channel based on the third indication information.

Optionally, the third indication information is a control identifier whose value is the second value in the A-Control field in the high throughput HT control field in the (QoS) Null frame, and the The first field in the HT control field whose value is the third value indicates that the second field in the HT control field is the A-Control field.

In an example, when B0-B1 of the HT Control field of the QoS Null frame is set to 11, B2-B31 of the HT Control field is defined as the A-Control field, and the first 4 bits of the A-Control field are control Identification (Control ID), Control ID values 7-14 are not used. Then Control ID 7 (or any value from 7-14) can be defined as the third indication information.

Optionally, the frame allowed by the reverse protocol is used to confirm the second PPDU, or the frame allowed by the reverse protocol is independent of the first confirmation frame used to confirm the second PPDU, so The second PPDU is the latest PPDU sent by the first node before the frame allowed by the reverse protocol.

If the frame allowed by the reverse protocol has the acknowledgment function of acknowledging PPDU, the frame allowed by the reverse protocol can be used as an acknowledgment frame (BA frame or Ack frame) at the same time. At this time, the second node can pass the frame allowed by the reverse protocol. Reply to the PPDU frame received from the first node.

If the allowed frame of the reverse protocol does not have the confirmation function to confirm the PPDU, the allowed frame of the reverse protocol is independent of the first confirmation frame (BA frame or Ack frame) that confirms the second PPDU. .

In the case where the frames allowed by the reverse protocol are independent of the first acknowledgment frame for acknowledging the second PPDU, the second node sends the first acknowledgment frame on the secondary channel, and the first node sends the first acknowledgment frame on the secondary channel. The first acknowledgment frame is received on the secondary channel.

In the case where the allow frame of the reverse protocol does not have the acknowledgment function of acknowledging the PPDU, the second node, after receiving the second PPDU, sends the first acknowledgment frame to the first node for acknowledging the second PPDU, And send reverse protocol allowed frames on the secondary channel after the first acknowledgment frame.

In some embodiments, the conditions for the third frame to include frames allowed by the reverse protocol are: the first node is the transmission opportunity maintaining end of the secondary channel, and the first node turns on the Reverse protocol for secondary channels.

In this embodiment of the present application, when the first node enables the reverse protocol for the secondary channel, the third frame may be a frame allowed by the reverse protocol. Otherwise, the third frame does not include a frame allowed by the reverse protocol.

Optionally, the first node sends a third PPDU on the secondary channel, where the third PPDU is used to indicate opening a reverse protocol of the secondary channel.

At this time, the second node receives the third PPDU on the secondary channel.

The first node serves as the transmission opportunity maintenance end of the secondary channel and sends the PPDU on the secondary channel to instruct the second node to start the reverse protocol of the secondary channel.

Optionally, the third PPDU includes fourth indication information, and the fourth indication information is used to indicate opening the reverse protocol of the secondary channel.

Optionally, the fourth indication information is located in the reverse authorization/more PPDU subfield in the HT control field in the third PPDU.

The transmission opportunity maintenance end can indicate whether to enable it through the reverse direction grant (RDG)/More PPDU (More PPDU) subfield of the HT Control field (HT Control field) in the PPDU sent on the secondary channel. Reverse protocol for secondary channels. The PPDU indicating enabling the reverse protocol is the third PPDU.

In an example, if the RDG/More PPDU subfield of the HT Control field in the PPDU is set to 1, it means that the transmission opportunity maintainer has opened the Reverse direction protocol, which allows the transmission opportunity responder to send the PPDU.

In some embodiments, the first node determines that the first transmission opportunity of the primary channel is terminated, and then sends the first frame on the secondary channel, including:

The first node determines that the first transmission opportunity of the primary channel is terminated at the first moment, and then sends the first frame on the secondary channel at the second moment, and the second moment is located after the first moment and is the same as the first moment. The first moment is separated by the first duration.

Optionally, the first duration includes at least one SIFS duration.

After the first node determines at the first moment that the first transmission opportunity of the main channel is terminated:

If there is no PPDU being sent, the first frame is sent after a SIFS interval. At this time, the first duration includes one SIFS;

If there is a PPDU being sent, the first frame is sent after the PPDU being sent and the acknowledgment frame for the PPDU is received. At this time, the first duration at least includes: the sending duration of the PPDU being sent and the reception of the acknowledgment frame. Duration and a SIFI;

If the third frame is received and feedback of the third frame is required, the first duration at least includes: the duration of sending the acknowledgment frame used for feedback of the third frame.

In the embodiment of the present application, the size of the first duration may be determined based on the data exchanged between the first node and the second node. The embodiment of the present application does not place any limit on the size of the fourth duration.

In some embodiments, the first node receives a sixth frame on the secondary channel, the sixth frame is a response frame of the first frame, and the sixth frame is used to terminate the secondary channel. The NAV of the second transmission opportunity or said secondary channel.

Figure 9 This embodiment of the present application provides a channel usage method, applied to the first node, as shown in Figure 9, including:

S901. After sending the fourth physical layer protocol data unit PPDU on the secondary channel, the first node detects whether the first transmission opportunity of the primary channel is terminated; if the first transmission opportunity of the primary channel is terminated, the first node of the secondary channel The second transmission opportunity is terminated.

After sending the fourth PPDU on the secondary channel, the first node detects on the primary channel whether the first transmission opportunity of the primary channel is terminated. If the first transmission opportunity of the primary channel is terminated, it ends the second transmission of the secondary channel. opportunity, the second transmission opportunity of the secondary channel is terminated; if the first transmission opportunity of the primary channel is not terminated, continue to send the next fourth PPDU on the secondary channel.

Optionally, the first node does not have capability one and cannot perform CCA or monitor the channel on the primary channel and the secondary channel at the same time. At this time, the first node monitors whether the first transmission opportunity of the primary channel has been terminated on the primary channel and transmits the fourth PPDU on the secondary channel in a time-sharing manner.

It can be understood that the second transmission opportunity of the secondary channel is used for communication between the first node and the second node. The first node is the transmission opportunity holder of the secondary channel and can send PPDU to the second node on the secondary channel.

Optionally, the first node is terminated at the first transmission opportunity when it cannot learn the main channel through the second node,

The reason why the first node cannot learn the first transmission opportunity of the main channel through the second node and is terminated includes at least one of the following:

The second node participates in the transmission of the primary channel, but the second node cannot send the third frame on the secondary channel;

The second node does not participate in the transmission of the main channel.

Optionally, the first transmission opportunity of the main channel is used for communication between the second node and the third node; or, for communication between the third node and the fourth node.

When the first transmission opportunity of the primary channel established between the second node and the third node is terminated, the first node working on the secondary channel cannot learn that the first transmission opportunity of the primary channel is terminated.

The channel usage method provided by the embodiment of the present application, when it is determined that the first transmission opportunity of the primary channel is terminated, the transmission opportunity on the secondary channel is synchronously terminated, so that the second transmission opportunity of the secondary channel is synchronized with the transmission opportunity of the primary channel. Terminate, so that the usage duration of the secondary channel is as close as possible to the actual usage duration of the primary channel, maintaining fairness to other devices using the secondary channel.

In some embodiments, the fourth PPDU includes:

A regular PPDU sent when the NAV maintained on the main channel is reset may be ignored or the NAV value of the main channel exceeds the first threshold;

The short PPDU is sent when the NAV value of the main channel does not exceed the first threshold, and the length of the short PPDU is smaller than the length of the regular PPDU.

The fourth PPDU sent by the first node includes two types:

The first type, conventional PPDU;

The second type is short PPDU.

The first node may directly send a regular PPDU, ignoring the possibility of NAV being reset.

When the first node considers the possibility of NAV being reset, if the NAV value maintained by the main channel exceeds the first threshold,

If it is considered that the NAV that can be maintained on the primary channel is unlikely to be reset, a regular PPDU is sent.

The first node may consider the possibility of the NAV being reset, and if the value of the NAV maintained by the main channel does not exceed the first threshold, it may be considered that the possibility of the NAV maintained by the main channel being reset is high, then Send short PPDU.

Optionally, the first threshold may be a duration specified in the protocol, a set duration, or a duration indicated by the set parameter.

Optionally, the first threshold is determined based on a transmission opportunity length threshold using RTS/CTS conditions. In one example, the first threshold is 32 μs*transmission opportunity length threshold based on using RTS/CTS conditions.

In some embodiments, the length of the short PPDU includes at least one of the following:

fixed length;

the length in the first length range;

The length is determined based on the length of the conventional PPDU and the first value.

Optionally, the lengths of different short PPDUs are the same or different.

Optionally, when the length of the short PPDU is a fixed length, the length of the short PPDU sent each time does not change, and the lengths of different short PPDUs are the same.

Optionally, when the length of the short PPDU is a length in the first length range, the length of the short PPDU sent each time is a length obtained based on sequence or randomly within the first length range, then different short PPDUs have different lengths. .

Optionally, when the length of the short PPDU is determined based on the length of the conventional PPDU and the first value, the first value is less than 1, and the first value remains unchanged, and the length of the short PPDU sent each time does not change. change, the lengths of different short PPDUs are the same.

In some embodiments, the first node detects whether the first transmission opportunity of the main channel is terminated by at least one of the following:

CCA;

Whether the main channel receives a fourth frame, the fourth frame is used to indicate that the network allocation vector NAV of the main channel is reset to 0.

The first node determines whether the first transmission opportunity is terminated through CCA or channel monitoring of the main channel. When the result of CCA is that the main channel is idle, or the first node is received on the main channel indicating that the NAV of the main channel is reset to 0. Four frames later, the first node determines that the first transmission opportunity of the primary channel is terminated.

In some embodiments, the conditions for determining that the first transmission opportunity of the main channel is terminated through CCA include:

It is determined through CCA that the main channel is idle within the second duration.

Optionally, the second duration includes one of the following:

Short interframe space SIFS, centralized coordination function interframe space PIFS, distributed coordination function interframe space DIFS.

In some embodiments, the conditions under which the first transmission opportunity of the main channel is terminated include:

A second frame is transmitted on the main channel, and the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

Here, the sending end of the second frame is sent by any node using the main channel.

The channel usage method provided by the embodiment of the present application can proactively monitor whether the first transmission opportunity of the main channel has been terminated on the main channel when the first transmission opportunity of the main channel cannot be known, and during the monitoring process, The length of the sent PPDU can be flexibly controlled by sending regular PPDU or short PPDU, so that the first transmission opportunity of the primary channel is terminated in time, so as to terminate the secondary channel as much as possible, so that the usage time of the secondary channel is close to that of the primary channel Actual usage duration to maintain fairness to other devices using the secondary channel.

Next, the NAV of the definition of the primary channel and the secondary channel in the channel usage method provided by the embodiment of the present application will be described.

A BSS may include a primary channel and multiple secondary channels, and a node may be associated with some or all of the channels in a BSS. It is understandable that a node can work on some or all of the channels in a BSS. TXOP defines the duration for two nodes that perform frame transmission to send frames on the channel. The NAV maintained by other nodes associated with the channel for the channel is set to the duration of the transmission opportunity.

For the primary channel, nodes that have not established a transmission opportunity on the primary channel maintain the NAV of the primary channel. For a secondary channel, nodes that have not established a transmission opportunity on the channel maintain the NAV of the secondary channel. A node can be associated with multiple secondary channels.

For the main channel, the main channel is maintained at one NAV or two NAV.

If the main channel is maintained with a NAV, and the NAV is 0, the main channel is considered idle; otherwise, the main channel is considered busy.

If the main channel maintains two NAVs, and both NAVs are 0, the main channel is considered idle; otherwise, the main channel is considered busy.

The updating method of the NAV maintained by the main channel includes: receiving a fourth frame on at least one channel including at least the main channel, then the NAV maintained by the main channel is reset to the NAV indicated by the fourth frame. A duration.

The fourth frame may be received on one or more channels at the same time. If the channel on which the fourth frame is received includes the main channel, the NAV maintained on the main channel is reset based on the fourth frame. It can be understood that resetting the NAV maintained on the main channel can be understood as updating the NAV maintained on the main channel, and the size after the update may be larger or smaller than the size before the update.

Alternatively, the fourth frame may include the second frame.

The fourth frame may include but is not limited to: RTS frame, CTS frame, CF_END frame.

If the main channel is maintained at an NAV, the NAV at which the main channel is maintained is reset to the first duration.

Optionally, the conditions for the NAV to be reset when the main channel is maintained include at least one of the following:

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame;

The first duration is greater than a current value of NAV maintained by the main channel.

If the main channel is maintained with two NAVs, the methods for resetting the two NAVs include:

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.

If both NAVs are reset to the first duration, the two NAVs are a whole, and the duration of the first transmission opportunity of the main channel is the first duration.

If a first target NAV among the two NAVs is reset to the first duration, the two NAVs are independent, and the duration of the first transmission opportunity of the main channel is the larger of the two NAVs. In the case where the two NAVs are independent, the first target NAV is updated, and the other NAV of the two NAVs other than the first target NAV is not updated.

Optionally, when both NAVs are updated to the first duration, the first target NAV among the two NAVs is reset to the first duration, and the two Another NAV among the NAVs other than the first target NAV is reset to the first duration following the first target NAV.

Here, when the two NAVs maintained on the main channel are reset at the same time, the first target NAV is reset first, and the other NAV of the two NAVs is updated following the first target NAV.

In some embodiments, the two NAVs maintained on the main channel include basic NAV and basic service set BSS internal NAV,

If the fourth frame belongs to inter-BSS, the first target NAV is the basic NAV;

If the fourth frame belongs to the intra-BSS or the fourth frame cannot be identified as inter-BSS or intra-BSS, the first target NAV is the intra-BSS NAV.

Basic NAV is based on inter-BSS PPDU updates, and intra-BSS NAV is based on intra-BSS PPDU updates or PPDU updates that cannot be recognized as intra-BSS PPDUs or inter-BSS PPDUs.

Optionally, the conditions for the basic NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the inter-BSS or the fourth frame cannot be identified as the inter-BSS or intra-BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.

In an example, the fourth frame received by STA1 belongs to inter-BSS, and the receiving address is not the MAC address of STA1, then the BSS internal NAV of the main channel is reset. The fourth frame received by STA2 belongs to inter-BSS, and the receiving address is The MAC address of STA2 will not reset the basic NAV of the main channel. At this time, it can be considered that STA2 has established the first transmission opportunity on the main channel.

Optionally, the conditions for the BSS internal NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

In an example, the fourth frame received by STA1 belongs to the internal BSS, and the receiving address is not the MAC address of STA1, then the BSS internal NAV of the main channel is reset, and the receiving address of the fourth frame received by STA2 is the MAC address of STA2. Then the NAV of the main channel is not reset. At this time, it can be considered that STA2 has established the first transmission opportunity on the main channel.

For sub-channel

In at least one secondary channel associated with a node, the corresponding NAV is maintained for each channel.

In this embodiment of the present application, different sub-channels are maintained with independent NAV. In an example, node STA3 is associated with secondary channel 1 and secondary channel 2, and maintains the NAV of secondary channel 1 and the NAV of secondary channel 2.

If a secondary channel is maintained with a NAV and the NAV is 0, the secondary channel is considered idle; otherwise, the secondary channel is considered busy.

If a secondary channel is maintained with two NAVs, and both NAVs are 0, the secondary channel is considered to be idle; otherwise, the secondary channel is considered to be busy.

Optionally, one NAV or two NAVs are maintained for a first channel of the at least one secondary channel.

The number of NAVs maintained by different sub-channels in the at least one sub-channel is the same or different.

Here, the primary channel is any secondary channel among multiple channels associated with a node. If the first channel maintains one NAV, the transmission opportunity duration of the node that establishes the transmission opportunity on the first channel is the same as the duration of the NAV; if the first channel maintains two NAVs, the first transmission opportunity will be used for the first time. The transmission opportunity usage duration of a node that establishes a transmission opportunity on the channel is the same as the larger of the two NAVs.

The updating method of the NAV maintained by the secondary channel includes: when a fifth frame is received on at least one channel including at least the first channel, the NAV maintained by the first channel is reset to the fifth frame. The second duration of the frame indication.

The fifth frame may be received on one or more channels at the same time. If the channel on which the fifth frame is received includes the first channel, the NAV maintained on the first channel is reset based on the fifth frame. It can be understood that resetting the NAV for the first time the channel is maintained can be understood as updating the NAV for the first time the channel is maintained, and the size after the update may be larger or smaller than the size before the update.

Optionally, the fifth frame includes the first frame. The fifth frame may also include a sixth frame.

It is understandable that the fourth frame and the fifth frame may be the same frame. At this time, the frame is received on a channel including at least a main channel and a first channel. At this time, the main channel and the first channel can be compared based on the frame. The secondary channels are respectively maintained with NAV reset.

If the first channel is maintained for one NAV, the first channel is maintained for one NAV and is reset to the second duration.

Optionally, the conditions for a NAV to be reset when the channel is maintained for the first time include at least one of the following:

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame;

The second duration is a current value of NAV greater than the first time the channel is maintained.

If the first channel is maintained for two NAV,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.

If both NAVs are reset to the second duration, the two NAVs are a whole, and the duration of the second transmission opportunity of the secondary channel is the second duration.

If a second target NAV among the two NAVs is reset to the second duration, the two NAVs are independent, and the duration of the second transmission opportunity of the secondary channel is the larger of the two NAVs. In the case where the two NAVs are independent, the second target NAV is updated, and the other NAV of the two NAVs other than the second target NAV is not updated.

Optionally, when both NAVs are updated to the second duration, the second target NAV among the two NAVs is reset to the second duration, and the two Another NAV in the NAV other than the second target NAV is reset to the second duration following the second target NAV.

Here, in the case where the two NAVs maintained on the first channel are reset at the same time, the second target NAV is reset first, and the other NAV of the two NAVs is updated following the second target NAV.

In some embodiments, the two NAVs maintained for the first channel include basic NAV and BSS internal NAV,

If the fifth frame belongs to inter-BSS, the second target NAV is the basic NAV;

If the fifth frame belongs to the intra-BSS or the fifth frame cannot be identified as inter-BSS or intra-BSS, the second target NAV is the intra-BSS NAV.

In some embodiments, the conditions for the basic NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the inter-BSS or the fifth frame cannot be identified as the inter-BSS or intra-BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.

In some embodiments, the conditions for the BSS internal NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

In an example, STA1 and STA2 establish the first transmission opportunity on the main channel. The fourth frame receiving address received by STA3 is not its own MAC address, so the NAV of the main channel is reset. The fourth frame receiving address received by STA2 is its own MAC address, the NAV of the main channel will not be reset.

In an example, there are 1 primary channel and 4 secondary channels in a BSS: secondary channel 1, secondary channel 2, secondary channel 3, and secondary channel 4. The primary channel and the four secondary channels maintain their own NAVs respectively. If a CTS frame is received on the main channel, and if the CTS frame satisfies the requirement to reset the NAV maintained on the main channel, the NAV maintained on the main channel is reset. If a CTS frame is received on secondary channel 2, and if the CTS frame satisfies the requirement to reset the NAV maintained on secondary channel 2, the NAV maintained on secondary channel 2 is reset. If a CTS frame is received on the primary channel and secondary channel 2, and if the CTS frame satisfies the requirement to reset the NAV maintained on the primary channel and secondary channel 2, the NAV maintained on the primary channel and secondary channel 2 will be reset respectively. Reset. If a CTS frame is received on secondary channel 1 to secondary channel 3, if the CTS frame satisfies the NAV that resets secondary channel 1 to secondary channel 3 to be maintained, secondary channel 1 to secondary channel 3 will be maintained. The NAV is reset separately.

Next, the method for determining the channel usage duration provided by the embodiment of the present application will be further described.

In the embodiment of this application, the NAV on the primary channel and the secondary channel is defined, and then different secondary channels are proposed based on whether the AP or STA accesses the secondary channel and whether the device has the ability to listen on the primary channel and the secondary channel at the same time. Channel usage plan.

Definition of NAV of main channel

There may be 1 or 2 NAVs on the main channel.

In a scenario where the main channel includes 1 NAV, the station or AP will maintain a single NAV on the 20MHz main channel, abbreviated as P20 NAV.

A STA that receives at least one valid frame in a physical layer service data unit (PHY Service Data Unit, PSDU) (or PPDU) in a channel containing at least P20 can use any valid duration field (duration) from the PSDU (or PPDU). field) to update its P20 NAV. When the receiver address (RA) of the received frame is equal to the STA's own MAC address, the STA should not update its P20 NAV. For all other STAs that receive frames on a channel that includes at least P20, the STA shall update its P20 NAV when the duration of the reception is greater than the STA's current P20 NAV value. After receiving a PS-Poll frame in a channel containing at least P20, STA except STA whose RXVECTOR parameter RESPONSE_INDICATION of the received PS-Poll frame is NDP response shall update its P20 NAV according to the following conditions: When the new P20 NAV value When greater than the current P20 NAV value, set the data rate selection rule to use a duration value equal to the time (in microseconds) required to transmit one Ack frame plus one SIFS. If the calculated duration includes a fractional part, the value is rounded up to the next higher integer.

Therefore, the update rule for P20 NAV is: if a frame to set or reset NAV is received on a channel containing at least P20, the P20 NAV will be set or reset.

In a scenario where the main channel includes two NAVs, the station or AP will maintain two NAVs on the main 20MHz bandwidth channel: intra-BSS NAV in P20 (abbreviated as P20 intra-BSS NAV) and basic NAV in P20 (abbreviated as P20 basic NAV).

P20 intra-BSS NAV is updated via PPDU within the BSS. P20 basic NAV updates via inter-BSS PPDU or PPDU updates that cannot perform intra-BSS and inter-BSS classification.

P20 intra-BSS NAV corresponds to the P20 intra-BSS NAV timer, and P20 basic NAV corresponds to the P20 basic NAV timer. In the case where the site maintains two P20 NAVs, if the values of both NAV timers are 0, CS indicates that the medium (medium) is idle; if the value of at least one of the two P20 NAV timers is non-0 , then the virtual CS indicates that the medium is busy.

The STA shall modify the P20 intra-BSS NAV based on the duration indicated by the PSDU or PDDU received on the channel including at least P20 if the following conditions are met:

1. The received frame is within the BSS;

2. The indicated duration is greater than the current P20 intra-BSS NAV value;

3. The RA of the received frame is not the MAC address of the current STA; or the current STA is not the holder of the Transmission Opportunity (TXOP), and the frame carried by the PPDU is not a frame requesting the STA to respond immediately; or the current STA STA is a TXOP holder, and the received frame is a trigger frame.

The STA shall modify the P20 basic NAV based on the duration indicated by the PSDU or PDDU received on the channel including at least P20 if the following conditions are met:

1. The received frame is inter-BSS or cannot be identified as intra-BSS or inter-BSS;

2. The indicated duration is greater than the current P20 basic NAV value;

3. The RA of the received frame is not the MAC address of the current STA.

As mentioned above, when the main channel defines 2 NAV, the main channel can be determined to be idle only when the values of P20 intra-BSS NAV and P20 basic NAV are both 0.

Definition of NAV for secondary channels

The NAV of the secondary channel can be defined as non-primary 20MHz channel NAV (abbreviated as NP20 NAV). In the embodiment of this application, one or two NP20 NAVs are defined for each 20MHz non-primary channel, that is, a secondary channel other than the primary channel.

In a scenario that includes 1 NAV on each secondary channel, the station or AP will maintain an NP20 NAV on the 20MHz non-primary channel.

A STA that receives at least one valid frame in a PSDU (or PPDU) in a channel containing at least a 20Mhz subchannel may use information from any valid duration field in the PSDU (or PPDU) to update the NP20 NAV for that 20Mhz subchannel. When the receiver address (RA) of the received frame is equal to the STA's own MAC address, the STA should not update the NP20 NAV of its 20Mhz sub-channel. For all other STAs that receive frames on secondary channels that include at least 20Mhz, when the duration of reception is greater than the NP20 NAV value of the STA's current 20Mhz secondary channel, the STA should update the NP20 NAV of the 20Mhz secondary channel. After receiving a PS-Poll frame in a channel containing at least 20Mhz sub-channels, STAs other than S1G STAs whose RXVECTOR parameter RESPONSE_INDICATION of the received PS-Poll frame is an NDP response shall update the NP20 NAV containing the 20Mhz sub-channel according to the following conditions: When the new NP20 NAV value is greater than the current NP20 NAV value, set the data rate selection rule to use a duration value equal to the time (in microseconds) required to transmit one Ack frame plus one SIFS. If the calculated duration includes a fractional part, the value is rounded up to the next higher integer.

Therefore, the update rule for NP20 NAV is: if a frame to set or reset NAV is received on a channel containing at least a 20Mhz sub-channel, the NP20 NAV on that sub-channel will be set or reset. It is worth noting that when a STA is associated with a 20MHz*n BSS, then each of the n-1 20MHz non-main channels needs to define 1 NP20 NAV, so a total of n-1 NP20 NAVs need to be defined. . For example, if the BSS is an 80MHz BSS, then 3 NP20 NAVs need to be defined and maintained.

Based on the above NP20 NAV setting and update guidelines, the following uses 40MHz BSS, 80MHz BSS and 80MHz BSS with 20MHz puncturing as examples for explanation. Other examples of bandwidth and puncturing combinations are similar to those listed and will not be explained one by one. It is worth noting that the following examples all use the Duration/ID field of the Request To Send (RTS)/Clear To Send (CTS) frame to set NAV as an example, but the frames for setting NAV are not limited to RTS/CTS frame, it can also be any other frame with Duration/ID field.

Taking 40MHz BSS as an example, as shown in Figure 10, the source (Source) (AP/STA) sends RTS frames on the 20MHz primary channel. For the destination (Destination), the RA of RTS is the MAC address of Destination. , so Destination will not set NAV on the primary channel. However, after the other end (STA or AP) receives the RTS on the primary channel, since the RA of the RTS is not the MAC address of the other end, the other end will set NAV on the primary channel. The duration of the NAV is in the RTS frame. The Duration/ID field indicates (that is, the end time of sending the Ack frame). The Destination that receives the RTS frame on the primary channel will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not set NAV on the primary channel, and other ends will based on the Duration/ID of the CTS. field updates NAV on the primary channel (the figure still shows the end time of sending the Ack frame). After the NAV of the primary channel is reduced to 0, the other end can perform CCA of DIFS duration on the primary channel. If the detection result is idle, then Others can compete for the use of the channel on the primary channel. Since no frames are sent on the 20MHz non-primary channel (also called secondary channel), Others can compete to use the channel immediately after CCA detects the DIFS duration idle on the non-primary channel.

Taking 40MHz BSS as an example, as shown in Figure 11, Source (AP/STA) sends RTS frames on the 20MHz non-primary channel (also called secondary channel). For Destination, since the RA of RTS is the MAC address of Destination , so Destination will not set NAV on the non-primary channel. However, after the Other (STA/AP) receives the RTS frame on the non-primary channel, since the RA of the RTS is not the MAC address of the Other, the Other will set NAV on the non-primary channel. The duration of the NAV is the Duration/ of the RTS frame. ID field indicates (that is, the end time of sending the Ack frame). The Destination that receives the RTS frame on the non-primary channel will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not set NAV on the non-primary channel, and Other will set the NAV based on the CTS. The Duration/ID field updates the NAV on the non-primary channel (the illustration is still the end time of sending the Ack frame). After the NAV of the non-primary channel is reduced to 0, Other can perform CCA of DIFS duration on the non-primary channel. If the result is idle, then Other can compete for the use of the channel on the non-primary channel. Since no frames are sent on the 20MHz primary channel, Others can compete to use the channel immediately after CCA detects the DIFS duration idle on the primary channel.

Taking 40MHz BSS as an example, as shown in Figure 12, Source (AP/STA) sends RTS frames on the 40MHz channel (including primary channel and non-primary channel). For Destination, since the RA of RTS is the MAC address of Destination , so Destination will not set NAV on primary channel and non-primary channel. However, after the Other (STA/AP) receives the RTS on the primary channel and non-primary channel, since the RA of the RTS is not the MAC address of the Other, the Other will set NAV on the primary channel and the non-primary channel. The duration of the NAV is The Duration/ID field of the RTS frame indicates (that is, the end time of sending the Ack frame). The Destination that receives the RTS frame on the primary channel and non-primary channel will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not set NAV on the primary channel and non-primary channel. Others will update NAV on the primary channel and non-primary channel based on the Duration/ID field of CTS (the figure still shows the end time of sending the Ack frame). After the NAV of the primary channel and non-primary channel is reduced to 0, Other can perform DIFS duration CCA on the primary channel and non-primary channel. If the result is idle, then Other can compete for use on the primary channel and non-primary channel. channel.

Taking 80MHz BSS as an example, as shown in Figure 13, Source (AP/STA) sends RTS frames on the primary channel. For Destination, since the RA of RTS is the MAC address of Destination, Destination will not be set on the primary channel. NAV. However, after the Other (STA/AP) receives the RTS frame on the primary channel, since the RA of the RTS is not the MAC address of the Other, the Other will set NAV on the primary channel. The duration of the NAV is indicated in the Duration/ID field of the RTS frame. (That is, the end time of sending the Ack frame). The Destination that receives the RTS frame on the primary channel will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not set NAV on the primary channel, and Other will respond based on the Duration/ID field of the CTS. Update NAV on the primary channel (the figure still shows the end time of sending the Ack frame). After the NAV of the primary channel is reduced to 0, Other can perform CCA of DIFS duration on the primary channel. If the result is idle, then Other can compete for the channel in the primary channel. Since no frames are sent on non-primary channel 1, non-primary channel 2 and non-primary channel 3, Other CCA detects DIFS duration on non-primary channel 1, non-primary channel 2 and non-primary channel 3 These channels can be used as soon as they become free.

Taking 80MHz BSS as an example, as shown in Figure 14, Source (AP/STA) sends RTS frames on non-primary channel 2 and non-primary channel 3. For Destination, since the RA of RTS is the MAC address of Destination, so Destination will not set NAV on non-primary channel 2 and non-primary channel 3. However, after Other (STA/AP) receives the RTS frame on non-primary channel 2 and non-primary channel 3, since the RA of RTS is not Other's MAC address, Other will receive the RTS frame on non-primary channel 2 and non-primary channel. Set NAV on 3. The duration of NAV is indicated in the Duration/ID field of the RTS frame (that is, the end time of sending the Ack frame). The Destination that receives the RTS frame on non-primary channel 2 and non-primary channel 3 will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not respond to non-primary channel 2 and non- NAV is set on primary channel 3, and Other will update NAV on non-primary channel 2 and non-primary channel 3 based on the Duration/ID field of CTS (the picture still shows the end time of sending the Ack frame). After the NAV of non-primary channel 2 and non-primary channel 3 is reduced to 0, Other can perform CCA on non-primary channel 2 and non-primary channel 3 to detect the CCA of DIFS duration. If the result is idle, then Other can Non-primary channel 2 and non-primary channel 3 compete for use of the channel. Since no frames are sent on the primary channel and non-primary channel 1, Others can compete to use these channels immediately after CCA detects the DIFS duration of idleness on the primary channel and non-primary channel 1.

Taking 80MHz BSS as an example, as shown in Figure 15, Source (AP/STA) sends RTS frames on primary channel and non-primary channel 1. For Destination, since the RA of RTS is the MAC address of Destination, Destination does not NAV will be set on primary channel and non-primary channel 1. However, after the Other (STA/AP) receives the RTS frame on the primary channel and non-primary channel 1, since the RA of RTS is not the MAC address of the Other, the Other will set NAV on the primary channel and non-primary channel 1. NAV The duration is indicated in the Duration/ID field of the RTS frame (that is, the end time of sending the Ack frame). The Destination that receives the RTS frame on the primary channel and non-primary channel 1 will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not be set on the primary channel and non-primary channel 1. NAV, and Other will update NAV on the primary channel and non-primary channel 1 based on the Duration/ID field of CTS (the figure is still the end time of sending the Ack frame). After the NAV of the primary channel and non-primary channel 1 is reduced to 0, Other can perform DIFS duration CCA on the primary channel and non-primary channel 1. If the result is idle, then Other can perform CCA on the primary channel and non-primary channel 1. 1Competition to use the channel. Since no frames are sent on non-primary channel 2 and non-primary channel 3, Others can compete to use these channels immediately after CCA detects the DIFS duration of idleness on non-primary channel 2 and non-primary channel 3.

Taking the 80MHz BSS as an example, as shown in Figure 16, the Source (AP/STA) is the 80MHz channel punctured in non-primary channel 2 (primary channel+non-primary channel 1+non-primary channel 3) RTS frame is sent on Destination. For Destination, since the RA of RTS is the MAC address of Destination, Destination will not set NAV on primary channel, non-primary channel 1 and non-primary channel 3. However, after the Other (STA/AP) receives the RTS frame on the primary channel, non-primary channel 1 and non-primary channel 3, since the RA of RTS is not the MAC address of the Other, the Other will receive the RTS frame on the primary channel, non-primary channel Set NAV on 1 and non-primary channel 3. The duration of NAV is indicated in the Duration/ID field of the RTS frame (that is, the end time of sending the Ack frame). Destination that receives RTS frames on primary channel, non-primary channel 1 and non-primary channel 3 will reply with a CTS frame at intervals of SIFS. Since the RA of the CTS frame is the MAC address of the Source, the Source will not be on the primary channel, non-primary channel. - Set NAV on primary channel 1 and non-primary channel 3, and Other will update NAV on primary channel, non-primary channel 1 and non-primary channel 3 based on the Duration/ID field of CTS (the picture is still Ack frame sending end time). OtherAfter the NAV of primary channel, non-primary channel 1 and non-primary channel 3 is reduced to 0, CCA can be performed on the primary channel, non-primary channel 1 and non-primary channel 3 to detect the CCA of DIFS duration. If the result is Idle, then Others can compete to use the channel in the primary channel, non-primary channel 1 and non-primary channel 3. Since no frames are sent on non-primary channel 2, Others can compete to use the channel immediately after CCA detects the DIFS duration idle on non-primary channel 2.

In the scenario where the secondary channel includes 2 NAV, the site AP will maintain two NAV (NP20 NAV) on each secondary 20MHz channel, and the access point will maintain two NAV (NP20 NAV) on each secondary 20MHz channel. NP20 NAV): intra-BSS NAV in NP20 (abbreviated as NP20 intra-BSS NAV) and basic NAV in NP20 (abbreviated as NP20 basic NAV).

NP20 intra-BSS NAV and NP20 basic NAV are defined as follows:

NP20 intra-BSS NAV is updated through PPDU within the BSS, NP20 basic NAV is updated through PPDU between BSS or PPDU that cannot be classified within BSS and between BSS.

NP20 intra-BSS NAV corresponds to the NP20 intra-BSS NAV timer, and NP20 basic NAV corresponds to the NP20 basic NAV timer. In the case where the site maintains two NP20 NAV, if the values of both NP20 NAV timers are 0, CS indicates that the medium (medium) is idle; if the value of at least one of the two NP20 NAV timers is non 0, the virtual CS indicates that the medium is busy.

The STA shall modify the NP20 intra-BSS NAV based on the duration indicated by a PSDU or PDDU received on a channel that includes at least a sub-20 MHz channel if the following conditions are met:

1. The received frame is within the BSS;

2. The indicated duration is greater than the current NP20 intra-BSS NAV value;

3. The RA of the received frame is not the MAC address of the current STA; or the current STA is not the holder of the Transmission Opportunity (TXOP), and the frame carrying the PPDU is not a frame requesting the STA to respond immediately; or the current STA STA is a TXOP holder, and the received frame is a trigger frame.

The STA shall modify the NP20 basic NAV based on the duration indicated by a PSDU or PDDU received on a channel that includes at least a sub-20 MHz channel if the following conditions are met:

2. The indicated duration is greater than the current NP20 basic NAV value;

3. The RA of the received frame is not the MAC address of the current STA.

As mentioned above, when a STA is associated with a 20MHz*n BSS, then each of the n-1 20MHz non-main channels needs to define 2 NP20 NAVs, so a total of 2*(n-1 ) NP20 NAVs, including n-1 NP20 basic NAVs and n-1 NP20 intra-BSS NAVs. For example, if the BSS is an 80MHz BSS, then 3 NP20 basic NAVs and 3 NP20 intra-BSS NAVs need to be defined and maintained. In addition, when each non-primary 20MHz channel defines 2 NP20 NAV, the non-primary 20MHz channel can be determined to be idle only when NP20 intra-BSS NAV and NP20 basic NAV are both 0.

Below, take the primary signal and each secondary channel to define 1 NAV as an example to explain the termination of the usage duration of the secondary channel. The primary channel and each secondary channel define 2 NAV (basic NAV and intra-BSS NAV) scenario next time The method of terminating the usage duration of the channel is similar and will not be described again here.

In the embodiment of the present application, after the STA/AP sends CF-End, it will immediately terminate the use of the relevant channel (for example, terminate TXOP and/or reset NAV to 0).

Here, the method for terminating the usage duration of the secondary channel provided by the embodiment of the present application will be described based on different situations in which the AP accesses the secondary channel or the STA accesses the secondary channel. Among them, the device that performs secondary channel access is the TXOP holder of the secondary channel.

Embodiment 1: AP performs secondary channel access

The AP does secondary channel access, that is, the AP is a TXOP holder on the secondary channel. Since the AP has strong capabilities, it can be assumed that the AP has the ability to perform CCA and/or monitor channels on the primary channel and secondary channel at the same time. When the AP detects on the primary channel that the NAV of the primary channel has been reset, the AP can directly send CF-End on the secondary channel to terminate the use of the secondary channel.

Taking 40MHz BSS as an example, the transmission opportunity update of the secondary channel is shown in Figure 17. In the initial state, AP and STA 1 establish a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, the AP and STA 2 establish a TXOP on the secondary channel with a duration less than or equal to T0 (the secondary channel TXOP holder is the AP). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1. At this time, the transmission opportunity of the secondary channel is updated.

Since the STA may not have the ability to perform CCA and/or monitor the channel on the primary channel and the secondary channel at the same time, the AP learns on the primary channel that the NAV of the primary channel has been reset, and the AP as the secondary channel TXOP holder finishes sending the current PPDU (PPDU 2) and receiving it. At T2 time after the BlockAck/Ack interval SIFS, the CF-End is actively sent on the secondary channel to terminate the use of the secondary channel. The secondary channel is idle after T2 time. In addition, for STA 2, its main channel is also idle after time T2.

Among them, the AP and STA (such as STA 1) are not limited to establishing TXOP on the main channel, and it can also be P2P transmission.

Embodiment 2: STA performs secondary channel access

The STA may or may not have the ability to simultaneously CCA and/or monitor the primary channel and secondary channel.

Scenario 1. STA has the ability to perform CCA and/or monitor channels on the primary channel and secondary channel simultaneously.

Taking 40MHz BSS as an example, as shown in Figure 18, in the initial state, AP and STA 1 establish a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking AP as an example, it can also be STA 1) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1.

Since STA 2 has the ability to CCA and/or monitor channels on both the primary channel and the secondary channel at the same time, STA 2 on the primary channel can learn that the NAV of the primary channel has been reset. At this time, STA 2's TXOP on the secondary channel should also be terminated. As the secondary channel TXOP holder, STA2 sends the CF-End on the secondary channel at T2 time after sending the current PPDU (PPDU 2) and receiving the BlockAck/Ack interval SIFS. Then the secondary channel is idle after T2 time.

It should be noted that after STA 2, as a TXOP holder, sends the CF-End on the secondary channel to the AP as the TXOP responder, there is a SIFS interval. The AP can also broadcast a CF-End to indicate the termination of the secondary channel TXOP.

Scenario 2: STA performs CCA and/or monitors the channel on the primary channel and secondary channel in a time-sharing manner

At this time, the STA does not have the ability to perform CCA and/or monitor the channel on the primary channel and secondary channel at the same time.

When the STA does not have the ability to CCA and/or monitor channels on both the primary channel and the secondary channel at the same time, the STA needs to monitor management frames and other information on the primary channel, and then go to the secondary channel to send and receive data frames and/or control frames according to the AP's schedule. After the secondary channel completes sending and receiving frames, the STA needs to return to the primary channel to continue monitoring management frames on the primary channel. Therefore, the STA can only perform CCA and/or monitor the channel in a time-sharing manner on the primary channel and the secondary channel. When the NAV on the primary channel is reset, the STA may not be able to learn in time and still work according to the originally set secondary channel TXOP duration. This This will cause the problem of inconsistency between the usage time of the secondary channel and the actual usage time of the primary channel.

In scenario 2, the termination scheme for the secondary channel usage duration includes the following two schemes:

Solution 1: The AP sends a frame on the secondary channel to instruct the STA to send CF-End to end the secondary channel TXOP.

In scheme 1, STA 2 is the TXOP holder of the secondary channel. The AP, as a TXOP responder, can only send Ack/BlockAck frames, or the TXOP holder allows the TXOP responder to send other than Ack/BlockAck frames through the reverse direction protocol. PPDU (i.e. other frames). Here, you can send other frames through the modified Ack/BlockAck frame or by opening the Reverse direction protocol on the secondary channel to request the TXOP holder to terminate the use of the secondary channel, and then confirm it by the TXOP holder (that is, the TXOP holder sends CF-End on the secondary channel to terminate the use of secondary channels).

Taking 40MHz BSS as an example, as shown in Figure 19, in the initial state, AP and STA 1 establish a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1.

Since STA 2 can only perform CCA and/or monitor channels in a time-sharing manner on the primary channel and secondary channel, STA 2 cannot know that the NAV of the primary channel has been reset, but the AP can reply on the secondary channel after receiving the current PPDU (PPDU2) interval SIFS. Modify the Ack/BlockAck frame or other frames (PPDU) allowed by the Reverse direction protocol to request the TXOP holder to terminate the use of the secondary channel, and then STA 2 as the TXOP holder at the T2 moment after the interval SIFS sends CF-End on the secondary channel to terminate the time TXOP of the channel. In addition, after STA 2 sends CF-End on the secondary channel at time T2, it can also default to the main channel being idle after time T2.

Based on different frames, frame format modification solutions include:

Modification plan 1. Modify BlockAck frame

The format of the BlockAck frame is shown in Figure 20. You can use B0 of the BA Control field reserved bit or any bit (such as B0) from B5 to B8 to define it as TXOP End. When this bit (ie B0) in BlockAck is set to 1 , it means that the sender of the BlockAck frame requests the receiver to immediately terminate the TXOP to help the third-party station reset the NAV=0 of the current channel. That is, the AP, as the TXOP holder on the secondary channel, sends a BlockAck to the TXOP holder (i.e. STA 2), requesting the TXOP holder to immediately terminate the TXOP of the secondary channel.

Modification plan 2, modify the Ack frame

You can consider carrying the TXOP End indication in the SERVICE field (16 bits) in the Data field of the PPDU carrying the Ack frame. The PPDU may be non-HT PPDU, non-HT duplicate PPDU, HT PPDU, VHT PPDU, HE PPDU or EHT PPDU. Take the HE PPDU shown in Figure 21 as an example. B0 to B6 of the SERVICE field are Scramble Initialization, and B7~B15 of the SERVICE field are reserved bits. Then any of the reserved bits B7~B15 can be used. A bit (for example, B8) is defined as TXOP End. When this bit (i.e., B8) is set to 1 in the SERVICE field in the Data field of the HT PPDU carrying the Ack frame, it means that the sender of the Ack frame requests the receiver to terminate immediately. TXOP. That is, the AP, as the TXOP holder on the secondary channel, sends an Ack to the TXOP holder (i.e. STA 2), requesting the TXOP holder to immediately terminate the TXOP of the secondary channel.

Modification 3. TXOP holder turns on the reverse protocol by default on the secondary channel.

As shown in Figure 22, the TXOP holder (i.e. STA 2) can set the RDG/More PPDU subfield of the HT Control field to 1 in the PPDU sent on the secondary channel, which means that the TXOP holder has opened the Reverse direction protocol, which allows the TXOP responder to send PPDU. As shown in Figure 23 or 24, after receiving the PPDU sent by the TXOP holder, the AP as the TXOP responder can send a PPDU carrying TXOP End to instruct the TXOP holder to terminate the TXOP immediately. As shown in Figure 22, PPDU also includes the frame control field, duration field, address 1 to address 4 fields, sequence control bullet, and FCS field.

Among them, the premise for the implementation of modified solution 3 is: STA 2 is the TXOP holder of the secondary channel and has opened the Reverse direction protocol. As the secondary channel TXOP responder, the AP can send the newly designed TXOP End frame (management frame, Action frame, requires Ack) or The (QoS) Null frame that carries control information suggests that the TXOP holder terminates the TXOP of the secondary channel, and then the TXOP holder confirms it (that is, the TXOP holder sends CF-End on the secondary channel to terminate the TXOP of the secondary channel).

Taking 40MHz BSS as an example, as shown in Figure 23, in the initial state, AP and STA 1 established a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1. Since STA 2 as the TXOP holder cannot know that the NAV of the main channel has been reset, but STA 2 has turned on the Reverse direction protocol, then the AP can send the newly designed TXOP End frame or carry the new TXOP End frame on the secondary channel after receiving the current PPDU (PPDU2) interval SIFS. The (QoS) Null frame with control information recommends that the TXOP holder terminates the use of the secondary channel. In addition, the frame also has the BlockAck/Ack function to confirm the PPDU (PPDU2). Then after the SIFS interval, according to the Reverse direction protocol, STA 2 needs to Ack the TXOP End frame sent by the AP or the (QoS) Null frame carrying control information. At time T2 after STA 2 sends the Ack interval SIFS, STA 2, as the TXOP holder, sends a CF-End TXOP on the secondary channel to terminate the secondary channel. After STA 2 sends CF-End on the secondary channel at time T2, it can also default to the main channel becoming idle after time T2.

Taking 40MHz BSS as an example, as shown in Figure 24, in the initial state, AP and STA 1 established a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1. STA 2 as a TXOP holder cannot know that the NAV of the main channel has been reset, but STA 2 has turned on the Reverse direction protocol. Then the AP will send BlockAck/Ack for confirmation after receiving the current PPDU (PPDU2) interval SIFS. Then the AP sends a newly designed TXOP End frame or a (QoS) Null frame carrying control information on the secondary channel at intervals of SIFS time, suggesting that the TXOP holder terminates the use of the secondary channel. Then after the SIFS interval, STA 2 needs to Ack the TXOP End frame sent by the AP or the (QoS) Null frame carrying control information according to the Reverse direction protocol. At time T2 after STA 2 sends the Ack interval SIFS, STA 2, as the TXOP holder, sends a CF-End TXOP on the secondary channel to terminate the secondary channel. After STA 2 sends CF-End on the secondary channel at time T2, it can also default to the main channel becoming idle after time T2.

In Figure 23, the newly designed TXOP End frame sent by the AP on the secondary channel or the (QoS) Null frame carrying control information has the function of BlockAck/Ack. In Figure 24, the newly designed TXOP End frame sent by the AP on the secondary channel TXOP End frame or (QoS) Null frame carrying control information, independent of BlockAck/Ack.

For the newly designed TXOP End frame, the frame format is as shown in Figure 25, and the frame body (ie TXOP End) part can be empty (Null). The TXOP responder sends the frame to the TXOP holder, which advises the TXOP holder to stop TXOP immediately.

For the (QoS) Null frame, the frame format is shown in Figure 26. When B0-B1 of the HT Control field of the QoS Null frame is set to 11, B2-B31 of the HT Control field is defined as the A-Control field. The first 4 bits of the A-Control field are Control ID. Currently Control ID 7-14 are not used, so Control ID=7 (or any value in 7-14) can be defined as TXOP End. The following Control Information can be empty, which means that the QoS Null frame requests the TXOP holder to stop TXOP immediately.

Option 2: STA directly uses the secondary channel

If the AP participates in the transmission of the main channel but the AP cannot send CF-End on the main channel (for example, the STA has been sending on the main channel), or the AP does not participate in the transmission of the main channel (for example, the main channel performs P2P transmission), it works in secondary mode. STA 2 of the channel cannot know the status of the primary channel, so it can only use the secondary channel directly.

Taking 40MHz BSS as an example, as shown in Figure 27, in the initial state, AP and STA 1 establish a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2. A TXOP with a secondary channel establishment duration less than or equal to T0 (the secondary channel TXOP holder can be an AP or a STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1.

Since the AP cannot send CF-End on the secondary channel, STA 2 has the following two options when using the secondary channel:

Option 1. Ignore the possibility of resetting NAV on the main channel: STA 2 directly sends a complete (full) PPDU, and then checks whether the NAV on the main channel has been reset;

Option 2. Consider the possibility of resetting the NAV on the main channel: STA 2 sends a short PPDU, and then checks whether the NAV on the main channel has been reset;

The information/criteria based on which TA decides whether to send full PPDU or short PPDU on the secondary channel is: the TXOP length (or NAV length) of the primary channel.

STA 2 According to the TXOP length threshold using RTS/CTS conditions (dot11TXOPDurationRTSThreshold, less than 1023), if the length of the main channel TXOP (or NAV length) exceeds the threshold (32us*dot11TXOPDurationRTSThreshold), it means that the main channel NAV will most likely be reset, then STA Send short PPDU on the secondary channel; otherwise, send full PPDU on the secondary channel.

If STA2 sends full PPDU on the secondary channel

The actions of STA2 after sending the full PPDU include: STA2 performs CCA detection on the main channel and/or receives frames sent on the main channel;

·If STA2 detects that the primary channel is busy through CCA, STA2 continues to send the next full PPDU on the secondary channel;

·If STA2 detects that the primary channel is idle through CCA and/or STA2 happens to receive a NAV terminated frame on the primary channel, the use of the secondary channel will be terminated.

If STA2 sends short PPDU on the secondary channel

The length of short PPDU is determined by:

·Short PPDU length is fixed to a shorter length, such as L_min bytes; the length of PPDU sent each time remains unchanged;

·Short PPDU length takes a value as needed/randomly in a shorter interval, such as [L_min1, L_min2]; the length of the PPDU sent each time is variable;

·Set a constant n, the length of short PPDU is one-nth of full PPDU, short PPDU=full PPDU/n.

The actions of STA2 after sending short PPDU include: STA2 performs CCA detection on the main channel and/or receives frames sent on the main channel;

·If STA2 detects that the primary channel is busy through CCA, STA2 continues to send the next short PPDU on the secondary channel;

STA2 sends a short PPDU every T_burst, and then detects the main channel according to the above method; for example, T_burst=2*SIFS+TXTIME(Ack/BlockAck).

For Solution 1 in Scenario 2 of Embodiment 2 in which STA is a TXOP holder, the following instructions are also provided.

Instruction method 1: AP actively sends CF-End on the secondary channel to end the secondary channel TXOP

Assume that STA 2 communicates with the AP on the secondary channel. Since the AP has strong capabilities, it can monitor on the primary channel and the secondary channel at the same time. Then when the primary channel NAV is reset, the AP can learn the information on the primary channel. Therefore, the AP can directly send the TXOP established on the secondary channel between the CF-End and STA 2 on the secondary channel.

Taking 40MHz BSS as an example, as shown in Figure 28, in the initial state, AP and STA 1 established a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1.

STA 2 cannot know that the NAV of the main channel has been reset, but the AP as the TXOP responder can actively send CF-End on the secondary channel to terminate the TXOP of the secondary channel at T2 time after replying the BlockAck/Ack interval SIFS of the current PPDU (PPDU2), then The secondary channel is idle after time T2. In addition, after STA 2 receives the CF-End sent by the AP on the secondary channel at T2, it can also default to the main channel being idle after T2.

Instruction method 2: AP actively sends CF-End suggestion TXOP on the secondary channel, and the holder sends CF-End to end the secondary channel TXOP.

STA 2 is the TXOP holder of the secondary channel. As the TXOP responder, the AP actively sends a CF-End request to the TXOP holder to terminate the use of the secondary channel, and then the TXOP holder confirms it. That means that after the AP sends CF-End on the secondary channel, STA 2 also sends CF-End on the secondary channel to confirm the termination of the use of the secondary channel.

Taking 40MHz BSS as an example, as shown in Figure 29, in the initial state, AP and STA 1 establish a TXOP with a duration of T0 on the main channel (the main channel TXOP holder can be AP or STA 1). Correspondingly, AP and STA 2 The TXOP in which the secondary channel establishment duration is less than or equal to T0 (the secondary channel TXOP holder is STA 2). If the main channel NAV is reset at time T1, for example, the main channel TXOP holder (taking STA 1 as an example, it can also be AP) sends CF-End, then the main channel will be idle after time T1. In addition, for STA 1, the secondary channel is also idle after time T1.

STA 2 cannot know that the NAV of the main channel has been reset, but the AP can actively send CF-End on the secondary channel after replying to the BlockAck/Ack interval SIFS of the current PPDU (PPDU2) (the CF-End is initiated by the TXOP responder and its function is to suggest TXOP holder terminates TXOP), and then at T2 time after the interval SIFS, STA 2, which is the TXOP holder, also sends a CF-End TXOP on the secondary channel to terminate the secondary channel. In addition, after STA 2 sends CF-End on the secondary channel at time T2, it can also default to the main channel being idle after time T2.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of this application. For example, each specific technical feature described in the above-mentioned specific embodiments can be combined in any suitable way without conflict. In order to avoid unnecessary repetition, this application will no longer describe various possible combinations. Specify otherwise. For another example, any combination of various embodiments of the present application can be carried out. As long as they do not violate the idea of the present application, they should also be regarded as the contents disclosed in the present application. For another example, on the premise of no conflict, each embodiment described in this application and/or the technical features in each embodiment can be arbitrarily combined with the existing technology, and the technical solution obtained after the combination shall also fall within the scope of this application. protected range.

It should also be understood that in the various method embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in this application. The implementation of the examples does not constitute any limitations. In addition, in the embodiments of this application, the terms "downlink", "uplink" and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate that the transmission direction of signals or data is from the station. The first direction to the user equipment of the cell, "uplink" is used to indicate that the transmission direction of the signal or data is the second direction from the user equipment of the cell to the site, and "sidelink" is used to indicate that the transmission direction of the signal or data is A third direction sent from User Device 1 to User Device 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of this application, the term "and/or" is only an association relationship describing associated objects, indicating that three relationships can exist. Specifically, A and/or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Figure 28 is a schematic structural diagram of a channel usage device provided by an embodiment of the present application. It is applied to the first node. As shown in Figure 28, the channel usage device 2800 includes:

The first communication unit 2801 is configured to determine that the first transmission opportunity of the primary channel is terminated, and then send a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.

In some embodiments, the first frame is a contention-free end CF-End frame.

In some embodiments, the first communication unit 2801 is further configured to receive a second frame on the main channel, determine based on the second frame that the first transmission opportunity of the main channel is terminated, and the second The frame is used to indicate that the first transmission opportunity of the main channel is terminated.

In some embodiments, the first communication unit 2801 is further configured to actively terminate the first transmission opportunity of the main channel, thereby determining that the first transmission opportunity of the main channel is terminated.

In some embodiments, the first communication unit 2801 is further configured to send a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

In some embodiments, the second frame is a CF-End frame.

In some embodiments, the first communication unit 2801 is further configured to receive a third frame on the secondary channel, and determine that the first transmission opportunity of the primary channel is terminated based on the third frame. The third frame is Requesting the first node to send the first frame.

In some embodiments, the third frame is sent to the first node after the second node receives or sends a second frame on the main channel, and the second frame is used to indicate the third frame of the main channel. A transmission opportunity was terminated.

In some embodiments, the third frame includes one of the following:

The first block acknowledges the BA frame, the first acknowledgement ACK frame, the frame allowed by the reverse protocol, and the CF-End frame.

In some embodiments, the first BA frame includes first indication information, and the first indication information is used to request the first node to terminate the use of the secondary channel.

In some embodiments, the first indication information is located in a reserved bit in the BA control field of the first BA frame.

In some embodiments, the first physical layer protocol data unit PPDU carrying the first ACK frame carries second indication information, and the second indication information is used to request the first node to terminate the secondary channel. usage of.

In some embodiments, the second indication information is located in a reserved bit of the service field in the data field of the first PPDU.

In some embodiments, the frames allowed by the reverse protocol include at least one of the following: an end of transmission opportunity frame and a (quality of service) null data frame (QoS) Null frame carrying control information.

In some embodiments, the frame body of the transmission opportunity end frame is empty or setting information.

In some embodiments, the (QoS) Null frame carries third indication information, and the third indication information is used to request the first node to terminate the second transmission opportunity of the secondary channel.

In some embodiments, the third indication information is a control identifier whose value is the first value in the A-Control field in the high throughput HT control field in the (QoS) Null frame, The first field in the HT control field whose value is the second value indicates that the second field in the HT control field is the A-Control field.

In some embodiments, the frame allowed by the reverse protocol is used to confirm the second PPDU, or the frame allowed by the reverse protocol is independent of the first confirmation frame used to confirm the second PPDU. , the second PPDU is the latest PPDU sent by the first node before the frame allowed by the reverse protocol.

In some embodiments, the first communication unit 2801 is further configured to receive all the frames allowed by the reverse protocol on the secondary channel if they are independent of the first acknowledgment frame used to acknowledge the second PPDU. The first acknowledgment frame.

In some embodiments, the conditions for the third frame to include frames allowed by the reverse protocol are: the first node is the second transmission opportunity sustainer of the secondary channel, and the first node is enabled. Reverse protocol for the secondary channel.

In some embodiments, the first communication unit 2801 is further configured to send a third PPDU on the secondary channel, where the third PPDU is used to indicate opening the reverse protocol of the secondary channel.

In some embodiments, the third PPDU includes fourth indication information, and the fourth indication information is used to indicate opening the reverse protocol of the secondary channel.

In some embodiments, the fourth indication information is located in the reverse authorization/more PPDU subfield in the HT control field in the third PPDU.

In some embodiments, the first communication unit 2801 is further configured to determine at the first moment that the first transmission opportunity of the primary channel is terminated, and then send the first frame on the secondary channel at the second moment, and the second moment is located After the first time and separated from the first time by a first period of time.

In some embodiments, the first duration includes at least a short interframe space SIFS duration.

In some embodiments, the second transmission opportunity of the secondary channel is used for communication between the first node and the second node.

In some embodiments,

The first transmission opportunity of the main channel is used for communication between the first node and the third node; or,

The first transmission opportunity of the main channel is used for communication between the second node and the third node.

In some embodiments, the primary channel is maintained at one NAV or two NAV.

In some embodiments, when a fourth frame is received on at least one channel including at least the primary channel, the maintained NAV of the primary channel is reset to the first duration indicated by the fourth frame.

In some embodiments, when the main channel is maintained at an NAV, the NAV at which the main channel is maintained is reset to the first duration.

In some embodiments, the conditions for the NAV to be reset when the main channel is maintained include at least one of the following:

In some embodiments, the primary channel is maintained with two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.

In some embodiments, when both NAVs are updated to the first duration, the first target NAV of the two NAVs is reset to the first duration, and the The other NAV of the two NAVs other than the first target NAV is reset to the first duration following the first target NAV.

In some embodiments, the conditions for the basic NAV to be reset to the first duration include at least one of the following:

The first duration is greater than the current value of the basic NAV;

In some embodiments, the conditions for the BSS internal NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

In some embodiments, a corresponding NAV is maintained for each sub-channel associated with a node.

In some embodiments, one NAV or two NAVs are maintained for a first of the at least one secondary channel.

In some embodiments, the number of NAVs maintained for different sub-channels in the at least one sub-channel is the same or different.

In some embodiments, upon receiving a fifth frame on at least one channel including at least the first channel, the NAV maintained on the first channel is reset to the second NAV indicated by the fifth frame. Duration.

In some embodiments, if the channel is maintained for one NAV for the first time, the NAV for which the channel is maintained for the first time is reset to the second duration.

In some embodiments, the conditions for a NAV to be reset when the channel is maintained for the first time include at least one of the following:

In some embodiments, the first channel is maintained for two NAV cases,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.

In some embodiments, when both NAVs are updated to the second duration, the second target NAV of the two NAVs is reset to the second duration, and the The other NAV of the two NAVs other than the second target NAV is reset to the second duration following the second target NAV.

The second duration is greater than the current value of the basic NAV;

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

Figure 29 is a schematic diagram 2 of the structural composition of the channel usage device provided by the embodiment of the present application. It is applied to the second node. As shown in Figure 29, the channel usage device 2900 includes:

The second communication unit 2901 is configured to receive a first frame on the secondary channel, and determine that the second transmission opportunity of the secondary channel is terminated based on the first frame, where the first frame is used to indicate the second transmission opportunity of the secondary channel. The transfer opportunity was terminated.

In some embodiments, the second transmission opportunity for the secondary channel is terminated upon receipt of the first frame.

In some embodiments, the first frame is a contention-free end CF-End frame.

In some embodiments, the second communication unit 2901 is further configured to send a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

In some embodiments, the second communication unit 2901 is further configured to receive a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.

In some embodiments, the second frame is a CF-End frame.

In some embodiments, the second communication unit 2901 is further configured to send a third frame on the secondary channel, and the third needle is used to request the first node to send the first frame. The frame is also used to determine that the first transmission opportunity of the primary channel is terminated.

In some embodiments, the third frame is sent to the first node after the second node receives or sends a second frame on the main channel, and the second frame is used to indicate that the main channel The first transmission opportunity is terminated.

In some embodiments, the third frame includes one of the following:

The first block acknowledges the BA frame, the first acknowledgement ACK frame, the reverse protocol allowed frame, and the CF-End frame.

In some embodiments, the second communication unit 2901 is further configured to receive all the frames allowed by the reverse protocol on the secondary channel if they are independent of the first acknowledgment frame used to acknowledge the second PPDU. The first acknowledgment frame.

In some embodiments, the conditions for the third frame to include frames allowed by the reverse protocol are: the second node is the second transmission opportunity responder of the secondary channel, and the first node is enabled. Reverse protocol for the secondary channel.

In some embodiments, the second communication unit 2901 is further configured to receive a third PPDU on the secondary channel, where the third PPDU is used to indicate opening the reverse protocol of the secondary channel.

In some embodiments, the first transmission opportunity of the main channel is used for communication between the first node and the third node; or,

In some embodiments, the primary channel is maintained at one NAV or two NAV.

In some embodiments, the primary channel is maintained with two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.

The first duration is greater than the current value of the basic NAV;

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

In some embodiments, when the first channel is maintained for one NAV, the first channel is maintained for one NAV and is reset to the second duration.

In some embodiments, the first channel is maintained for two NAV cases,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.

The second duration is greater than the current value of the basic NAV;

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

Figure 30 is a schematic diagram 3 of the structure of a channel usage device provided by an embodiment of the present application. It is applied to the first node. As shown in Figure 30, the channel usage device 3000 includes:

Detection unit 3001 is configured to detect whether the first transmission opportunity of the primary channel is terminated after sending the fourth physical layer protocol data unit PPDU on the secondary channel; if the first transmission opportunity of the primary channel is terminated, the secondary channel The second transmission opportunity is terminated.

In some embodiments, the fourth PPDU includes:

fixed length;

the length in the first range of lengths;

In some embodiments, different short PPDUs have the same or different lengths.

In some embodiments, the method of detecting whether the first transmission opportunity of the main channel is terminated includes at least one of the following:

Clear channel assessment CCA;

Whether the main channel receives the sixth frame, the sixth frame is used to indicate that the network allocation vector NAV of the main channel is reset to 0.

In some embodiments, the condition for determining through CCA that the first transmission opportunity of the main channel is terminated includes: determining through CCA that the main channel is idle within a second duration.

In some embodiments, the second duration includes one of the following:

Short inter-frame space SIFS, centralized coordination function inter-frame space PIFS, distributed coordination function inter-frame space DIFS.

In some embodiments, the primary channel is maintained at one NAV or two NAV.

In some embodiments, the primary channel is maintained with two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.

The first duration is greater than the current value of the basic NAV;

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

In some embodiments, the first channel is maintained for two NAV cases,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.

The second duration is greater than the current value of the basic NAV;

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

Persons skilled in the art should understand that the relevant description of the above-mentioned channel use device in the embodiment of the present application can be understood with reference to the relevant description of the channel use method in the embodiment of the present application.

Figure 31 is a schematic structural diagram of a communication device 3100 provided by an embodiment of the present application. The communication device may be the first node or the second node. The communication device 3100 shown in Figure 31 includes a processor 3110. The processor 3110 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in Figure 31, the communication device 3100 may further include a memory 3120. The processor 3110 can call and run the computer program from the memory 3120 to implement the method in the embodiment of the present application.

The memory 3120 may be a separate device independent of the processor 3110, or may be integrated into the processor 3110.

Optionally, as shown in Figure 31, the communication device 3100 can also include a transceiver 3130. The processor 3110 can control the transceiver 3130 to communicate with other devices. Specifically, it can send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 3130 may include a transmitter and a receiver. The transceiver 3130 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 3100 can be specifically the first node in the embodiment of the present application, and the communication device 3100 can implement the corresponding processes implemented by the first node in the various methods of the embodiment of the present application. For the sake of brevity, they are not mentioned here. Again.

Optionally, the communication device 3100 can be specifically the second node in the embodiment of the present application, and the communication device 3100 can implement the corresponding processes implemented by the second node in the various methods of the embodiment of the present application. For the sake of brevity, they are not mentioned here. Again.

Figure 32 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 3200 shown in Figure 32 includes a processor 3210. The processor 3210 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in Figure 32, the chip 3200 may also include a memory 3220. The processor 3210 can call and run the computer program from the memory 3220 to implement the method in the embodiment of the present application.

The memory 3220 may be a separate device independent of the processor 3210, or may be integrated into the processor 3210.

Optionally, the chip 3200 may also include an input interface 3230. The processor 3210 can control the input interface 3230 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.

Optionally, the chip 3200 may also include an output interface 3240. The processor 3210 can control the output interface 2640 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.

Optionally, the chip can be applied to the first node in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first node in the various methods of the embodiment of the present application. For the sake of brevity, details will not be described here.

Optionally, the chip can be applied to the second node in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second node in the various methods of the embodiment of the present application. For the sake of brevity, the details will not be described again.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Figure 33 is a schematic block diagram of a communication system 3300 provided by an embodiment of the present application. As shown in Figure 33, the communication system 3300 includes a first node 3310 and a second node 3320.

Among them, the first node 3310 can be used to implement the corresponding functions implemented by the first node in the above method, and the second node 3320 can be used to implement the corresponding functions implemented by the second node in the above method. For simplicity, in This will not be described again.

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available processors. Programmed logic devices, discrete gate or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

It should be understood that the above memory is an exemplary but not restrictive description. For example, the memory in the embodiment of the present application can also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the first node in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiment of the present application. For the sake of simplicity, I won’t go into details here.

Optionally, the computer-readable storage medium can be applied to the second node in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the second node in the various methods of the embodiment of the present application. For the sake of simplicity, I won’t go into details here.

An embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the first node in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiment of the present application. For simplicity, in This will not be described again.

Optionally, the computer program product can be applied to the second node in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the second node in the various methods of the embodiment of the present application. For simplicity, in This will not be described again.

An embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the first node in the embodiment of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiment of the present application. For the sake of brevity, no further details will be given here.

Optionally, the computer program can be applied to the second node in the embodiment of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the second node in the various methods of the embodiment of the present application. For the sake of brevity, no further details will be given here.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

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 only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

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

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

A method for using a channel, the method includes:

The first node determines that the first transmission opportunity of the primary channel is terminated, and then sends a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.
The method of claim 1, wherein the second transmission opportunity of the secondary channel is terminated after the first frame is sent.
The method according to claim 1 or 2, wherein the first frame is a contention-free end CF-End frame.
The method according to any one of claims 1 to 3, wherein the first node determines that the first transmission opportunity of the main channel is terminated, including:

The first node receives a second frame on the main channel, determines based on the second frame that the first transmission opportunity of the main channel is terminated, and the second frame is used to indicate the third transmission opportunity of the main channel. A transmission opportunity was terminated.
The method according to any one of claims 1 to 3, wherein the first node determines that the first transmission opportunity of the main channel is terminated, including:

The first node actively terminates the first transmission opportunity of the main channel, thereby determining that the first transmission opportunity of the main channel is terminated.
The method of claim 5, further comprising:

The first node sends a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.
The method according to claim 4 or 6, wherein the second frame is a CF-End frame.
The method according to any one of claims 1 to 7, wherein the first node determines that the first transmission opportunity of the main channel is terminated, including:

The first node receives a third frame on the secondary channel, determines that the first transmission opportunity of the primary channel is terminated based on the third frame, and the third frame is used to request the first node to send the First frame.
The method according to claim 8, wherein the third frame is sent to the first node after the second node receives or sends a second frame on the main channel, and the second frame is used to indicate that the The first transmission opportunity of the main channel is terminated.
The method of claim 8 or 9, wherein the third frame includes one of the following:

The first block acknowledges the BA frame, the first acknowledgement ACK frame, the frame allowed by the reverse protocol, and the CF-End frame.
The method according to claim 10, wherein the first BA frame includes first indication information, and the first indication information is used to request the first node to terminate use of the secondary channel.
The method according to claim 11, wherein the first indication information is located in a reserved bit in a BA control field of the first BA frame.
The method according to claim 10, wherein the first physical layer protocol data unit PPDU carrying the first ACK frame carries second indication information, and the second indication information is used to request the first node Terminate use of the secondary channel.
The method according to claim 13, wherein the second indication information is located in a reserved bit of the service field in the data field of the first PPDU.
The method according to claim 10, wherein the frames allowed by the reverse protocol include at least one of the following: an end of transmission opportunity frame and a (quality of service) null data frame (QoS) Null frame carrying control information.
The method according to claim 15, wherein the frame body of the transmission opportunity end frame is empty or setting information.
The method according to claim 15, wherein the (QoS) Null frame carries third indication information, and the third indication information is used to request the first node to terminate the second transmission opportunity of the secondary channel.
The method according to claim 17, wherein the third indication information is the first value in the A-Control field in the high throughput HT control field in the (QoS) Null frame. A control identifier of the value. The first field in the HT control field whose value is the second value indicates that the second field in the HT control field is the A-Control field.
The method according to any one of claims 10, 15 to 18, wherein the frame allowed by the reverse protocol is used to confirm the second PPDU, or the frame allowed by the reverse protocol is the same as the frame used for confirming the second PPDU. The second PPDU confirms the first confirmation frame independently, and the second PPDU is the latest PPDU sent by the first node before the frame allowed by the reverse protocol.
The method according to claim 19, wherein if the frame allowed by the reverse protocol is independent of the first confirmation frame used to confirm the second PPDU, the method further includes:

The first node receives the first acknowledgment frame on the secondary channel.
The method according to any one of claims 10, 15 to 20, wherein the condition for the third frame to include the frame allowed by the reverse protocol is: the first node is the second node of the secondary channel. The transmission opportunity is maintained at the end, and the first node starts the reverse protocol of the secondary channel.
The method according to any one of claims 10, 15 to 21, wherein the method further comprises:

The first node sends a third PPDU on the secondary channel, where the third PPDU is used to indicate opening the reverse protocol of the secondary channel.
The method according to claim 22, wherein the third PPDU includes fourth indication information, and the fourth indication information is used to indicate opening a reverse protocol of the secondary channel.
The method according to claim 23, wherein the fourth indication information is located in the reverse authorization/more PPDU subfield in the HT control field in the third PPDU.
The method according to any one of claims 1 to 24, wherein the first node determines that the first transmission opportunity of the primary channel is terminated, and then sends the first frame on the secondary channel, including:

The first node determines that the first transmission opportunity of the primary channel is terminated at the first moment, and then sends the first frame on the secondary channel at the second moment, and the second moment is located after the first moment and is the same as the first moment. The first moment is separated by the first duration.
The method of claim 25, wherein the first duration includes at least a short interframe space (SIFS) duration.
The method according to any one of claims 1 to 26, wherein,

The second transmission opportunity of the secondary channel is used for communication between the first node and the second node.
The method according to any one of claims 1 to 27, wherein

The first transmission opportunity of the main channel is used for communication between the first node and the third node; or,

The first transmission opportunity of the main channel is used for communication between the second node and the third node.
A method according to any one of claims 1 to 28, wherein the main channel is maintained at one NAV or two NAV.
The method of claim 29, wherein:

When a fourth frame is received on at least one channel including at least the main channel, the NAV maintained on the main channel is reset to the first duration indicated by the fourth frame.
The method of claim 30, wherein:

When the main channel is maintained at one NAV, the NAV at which the main channel is maintained is reset to the first duration.
The method according to claim 31, wherein the conditions for the NAV to be reset when the main channel is maintained include at least one of the following:

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame;

The first duration is greater than a current value of NAV maintained by the main channel.
The method according to claim 30, wherein the main channel is maintained at two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.
The method of claim 33, wherein when both NAVs are updated to the first duration, a first target NAV of the two NAVs is reset to the first duration. duration, and the other NAV among the two NAVs other than the first target NAV is reset to the first duration following the first target NAV.
The method according to claim 33 or 34, wherein the two NAVs maintained by the main channel include basic NAV and basic service set BSS internal NAV,

If the fourth frame belongs to inter-BSS, the first target NAV is the basic NAV;

If the fourth frame belongs to the intra-BSS or the fourth frame cannot be identified as inter-BSS or intra-BSS, the first target NAV is the intra-BSS NAV.
The method of claim 35, wherein the conditions for the basic NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the inter-BSS or the fourth frame cannot be identified as the inter-BSS or intra-BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method according to claim 35, wherein the conditions for the BSS internal NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method according to any one of claims 1 to 37, wherein in at least one secondary channel associated with a node, each channel is maintained with a corresponding NAV.
38. The method of claim 38, wherein one NAV or two NAVs are maintained for a first channel of the at least one secondary channel.
The method of claim 39, wherein the number of NAVs maintained by different sub-channels in the at least one sub-channel is the same or different.
The method according to claim 39 or 40, wherein,

When a fifth frame is received on at least one channel including at least the first channel, the NAV maintained on the first channel is reset to the second duration indicated by the fifth frame.
The method according to claim 41, wherein when the first channel is maintained for one NAV, the first NAV for which the channel is maintained is reset to the second duration.
The method of claim 42, wherein the conditions for a NAV to be reset when the channel is maintained for the first time include at least one of the following:

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame;

The second duration is a current value of NAV greater than the first time the channel is maintained.
The method of claim 41, wherein the first channel is maintained for two NAVs,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.
The method of claim 44, wherein when both NAVs are updated to the second duration, a second target NAV of the two NAVs is reset to the second duration. duration, and the other NAV among the two NAVs other than the second target NAV is reset to the second duration following the second target NAV.
The method according to claim 44 or 45, wherein the two NAVs maintained by the first channel include basic NAV and BSS internal NAV,

If the fifth frame belongs to inter-BSS, the second target NAV is the basic NAV;

If the fifth frame belongs to the intra-BSS or the fifth frame cannot be identified as inter-BSS or intra-BSS, the second target NAV is the intra-BSS NAV.
The method of claim 46, wherein the conditions for the basic NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the inter-BSS or the fifth frame cannot be identified as the inter-BSS or intra-BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
The method according to claim 46, wherein the conditions for the BSS internal NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
A method for using a channel, the method includes:

The second node receives a first frame on the secondary channel, determines based on the first frame that the second transmission opportunity of the secondary channel is terminated, and the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.
The method of claim 49, wherein the second transmission opportunity of the secondary channel is terminated after reception of the first frame.
The method according to claim 49 or 50, wherein the first frame is a contention-free end CF-End frame.
The method according to any one of claims 49 to 51, wherein the method further comprises:

The second node sends a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.
The method according to any one of claims 49 to 51, wherein the method further comprises:

The second node receives a second frame on the main channel, where the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.
The method according to claim 52 or 53, wherein the second frame is a CF-End frame.
The method according to any one of claims 49 to 54, wherein the method further comprises:

The second node sends a third frame on the secondary channel, the third needle is used to request the first node to send the first frame, and the third frame is also used to determine the primary channel. The first transmission opportunity is terminated.
The method of claim 55, wherein the third frame is sent to the first node after the second node receives or sends a second frame on the main channel, and the second frame is used to Indicates that the first transmission opportunity of the primary channel is terminated.
The method of claim 55 or 56, wherein the third frame includes one of the following:

The first block acknowledges the BA frame, the first acknowledgement ACK frame, the frame allowed by the reverse protocol, and the CF-End frame.
The method according to claim 57, wherein the first BA frame includes first indication information, and the first indication information is used to request the first node to terminate the use of the secondary channel.
The method of claim 58, wherein the first indication information is located in a reserved bit in a BA control field of the first BA frame.
The method according to claim 57, wherein the first physical layer protocol data unit PPDU carrying the first ACK frame carries second indication information, and the second indication information is used to request the first node Terminate use of the secondary channel.
The method according to claim 60, wherein the second indication information is located in a reserved bit of the service field in the data field of the first PPDU.
The method of claim 57, wherein the frames allowed by the reverse protocol include at least one of the following: an end of transmission opportunity frame and a (quality of service) null data frame (QoS) Null frame carrying control information.
The method according to claim 62, wherein the frame body of the transmission opportunity end frame is empty or setting information.
The method according to claim 62, wherein the (QoS) Null frame carries third indication information, and the third indication information is used to request the first node to terminate the second transmission opportunity of the secondary channel.
The method according to claim 64, wherein the third indication information is the value of the A-Control (A-Control) field in the high throughput HT control field in the (QoS) Null frame. A control identifier of the value. The first field in the HT control field whose value is the second value indicates that the second field in the HT control field is the A-Control field.
The method according to any one of claims 57, 62 to 65, wherein the frame allowed by the reverse protocol is used to confirm the second PPDU, or the frame allowed by the reverse protocol is the same as the frame used for confirming the second PPDU. The second PPDU confirms the first confirmation frame independently, and the second PPDU is the latest PPDU sent by the first node before the frame allowed by the reverse protocol.
The method according to claim 66, wherein if the frame allowed by the reverse protocol is independent of the first confirmation frame used to confirm the second PPDU, the method further includes:

The second node receives the first acknowledgment frame on the secondary channel.
The method according to any one of claims 57, 62 to 67, wherein the condition for the third frame to include a frame allowed by the reverse protocol is: the second node is a second node of the secondary channel. The transmission opportunity responds to the end, and the first node activates the reverse protocol of the secondary channel.
The method according to any one of claims 57, 62 to 68, wherein the method further comprises:

The second node receives a third PPDU on the secondary channel, where the third PPDU is used to indicate opening a reverse protocol of the secondary channel.
The method according to claim 69, wherein the third PPDU includes fourth indication information, and the fourth indication information is used to indicate opening a reverse protocol of the secondary channel.
The method according to claim 70, wherein the fourth indication information is located in a reverse authorization/more PPDU subfield in the HT control field in the third PPDU.
The method according to any one of claims 49 to 71, wherein,

The second transmission opportunity of the secondary channel is used for communication between the first node and the second node.
The method according to any one of claims 49 to 72, wherein

The first transmission opportunity of the main channel is used for communication between the first node and the third node; or,

The first transmission opportunity of the main channel is used for communication between the second node and the third node.
A method according to any one of claims 49 to 73, wherein the primary channel is maintained at one NAV or two NAV.
The method of claim 74, wherein:

When a fourth frame is received on at least one channel including at least the main channel, the NAV maintained on the main channel is reset to the first duration indicated by the fourth frame.
The method of claim 75, wherein:

When the main channel is maintained at one NAV, the NAV at which the main channel is maintained is reset to the first duration.
The method according to claim 76, wherein the conditions for the NAV to be reset when the main channel is maintained include at least one of the following:

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame;

The first duration is greater than a current value of NAV maintained by the main channel.
The method of claim 75, wherein the main channel is maintained at two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.
The method of claim 78, wherein when both NAVs are updated to the first duration, a first target NAV of the two NAVs is reset to the first duration. duration, and the other NAV among the two NAVs other than the first target NAV is reset to the first duration following the first target NAV.
The method according to claim 78 or 79, wherein the two NAVs maintained by the main channel include a basic NAV and a basic service set BSS internal NAV,

If the fourth frame belongs to inter-BSS, the first target NAV is the basic NAV;

If the fourth frame belongs to the intra-BSS or the fourth frame cannot be identified as inter-BSS or intra-BSS, the first target NAV is the intra-BSS NAV.
The method of claim 80, wherein the conditions for the basic NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the inter-BSS or the fourth frame cannot be identified as the inter-BSS or intra-BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method according to claim 80, wherein the conditions for the BSS internal NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method according to any one of claims 49 to 82, wherein in at least one secondary channel associated with a node, each channel is maintained with a corresponding NAV.
83. The method of claim 83, wherein one NAV or two NAVs are maintained for a first channel of the at least one secondary channel.
The method of claim 84, wherein the number of NAVs maintained by different sub-channels in the at least one sub-channel is the same or different.
The method of claim 84 or 85, wherein,

When a fifth frame is received on at least one channel including at least the first channel, the NAV maintained on the first channel is reset to the second duration indicated by the fifth frame.
The method of claim 86, wherein when the first channel is maintained for one NAV, the first NAV for which the channel is maintained is reset to the second duration.
The method of claim 87, wherein the conditions for a NAV to be reset when the channel is maintained for the first time include at least one of the following:

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame;

The second duration is a current value of NAV greater than the first time the channel is maintained.
The method of claim 86, wherein the first channel is maintained for two NAVs,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.
The method of claim 89, wherein when both NAVs are updated to the second duration, a second target NAV of the two NAVs is reset to the second duration. duration, and the other NAV among the two NAVs other than the second target NAV is reset to the second duration following the second target NAV.
The method of claim 89 or 90, wherein the two NAVs maintained for the first time channel include basic NAV and BSS internal NAV,

If the fifth frame belongs to inter-BSS, the second target NAV is the basic NAV;

If the fifth frame belongs to the intra-BSS or the fifth frame cannot be identified as inter-BSS or intra-BSS, the second target NAV is the intra-BSS NAV.
The method of claim 91, wherein the conditions for the basic NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the inter-BSS or the fifth frame cannot be identified as the inter-BSS or intra-BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
The method according to claim 91, wherein the conditions for the BSS internal NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
A method for using a channel, the method includes:

After sending the fourth physical layer protocol data unit PPDU on the secondary channel, the first node detects whether the first transmission opportunity of the primary channel is terminated; if the first transmission opportunity of the primary channel is terminated, the second transmission opportunity of the secondary channel The transfer opportunity was terminated.
The method of claim 94, wherein the fourth PPDU includes:

A regular PPDU sent when the NAV maintained on the main channel is reset may be ignored or the NAV value of the main channel exceeds the first threshold;

The short PPDU is sent when the NAV value of the main channel does not exceed the first threshold, and the length of the short PPDU is smaller than the length of the regular PPDU.
The method according to claim 95, wherein the length of the short PPDU includes at least one of the following:

fixed length;

the length in the first length range;

The length is determined based on the length of the conventional PPDU and the first value.
The method according to claim 95 or 96, wherein the lengths of different short PPDUs are the same or different.
The method according to any one of claims 94 to 97, wherein the method for the first node to detect whether the first transmission opportunity of the main channel is terminated includes at least one of the following:

Clear channel assessment CCA;

Whether the main channel receives the sixth frame, the sixth frame is used to indicate that the network allocation vector NAV of the main channel is reset to 0.
The method according to claim 98, wherein determining, through CCA, that the first transmission opportunity of the main channel is terminated includes determining, through CCA, that the main channel is idle within a second duration.
The method of claim 99, wherein the second duration includes one of the following:

Short interframe space SIFS, centralized coordination function interframe space PIFS, distributed coordination function interframe space DIFS.
The method according to any one of claims 94 to 100, wherein the conditions for the first transmission opportunity of the main channel to be terminated include:

A second frame is transmitted on the main channel, and the second frame is used to indicate that the first transmission opportunity of the main channel is terminated.
A method according to any one of claims 94 to 101, wherein the primary channel is maintained at one NAV or two NAV.
The method of claim 102, wherein:

When a fourth frame is received on at least one channel including at least the main channel, the NAV maintained on the main channel is reset to the first duration indicated by the fourth frame.
The method of claim 103, wherein:

When the main channel is maintained at one NAV, the NAV at which the main channel is maintained is reset to the first duration.
The method according to claim 104, wherein the conditions for the NAV to be reset when the main channel is maintained include at least one of the following:

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame;

The first duration is greater than a current value of NAV maintained by the main channel.
The method of claim 103, wherein the main channel is maintained at two NAVs,

Both NAVs are reset to the first duration; or,

A first target NAV of the two NAVs is reset to the first duration.
The method of claim 103, wherein when both NAVs are updated to the first duration, the first target NAV of the two NAVs is reset to the first duration. duration, and the other NAV among the two NAVs other than the first target NAV is reset to the first duration following the first target NAV.
The method according to claim 106 or 107, wherein the two NAVs maintained by the main channel include basic NAV and basic service set BSS internal NAV,

If the fourth frame belongs to inter-BSS, the first target NAV is the basic NAV;

If the fourth frame belongs to the intra-BSS or the fourth frame cannot be identified as inter-BSS or intra-BSS, the first target NAV is the intra-BSS NAV.
The method of claim 108, wherein the conditions for the basic NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the inter-BSS or the fourth frame cannot be identified as the inter-BSS or intra-BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method of claim 108, wherein the conditions for the BSS internal NAV to be reset to the first duration include at least one of the following:

The fourth frame belongs to the BSS;

The first duration is greater than the current value of the basic NAV;

The receiving end address of the fourth frame is not the address of the node that receives the fourth frame.
The method according to any one of claims 94 to 110, wherein in at least one secondary channel associated with a node, each channel is maintained with a corresponding NAV.
111. The method of claim 111, wherein one NAV or two NAVs are maintained for a first channel of the at least one secondary channel.
The method according to claim 112, wherein the number of NAVs maintained by different sub-channels in the at least one sub-channel is the same or different.
The method according to claim 112 or 113, wherein

When a fifth frame is received on at least one channel including at least the first channel, the NAV maintained on the first channel is reset to the second duration indicated by the fifth frame.
The method of claim 114, wherein when the first channel is maintained for one NAV, the first NAV for which the channel is maintained is reset to the second duration.
The method of claim 115, wherein the conditions for a NAV to be reset when the channel is maintained for the first time include at least one of the following:

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame;

The second duration is a current value of NAV greater than the first time the channel is maintained.
The method of claim 114, wherein the first channel is maintained for two NAVs,

Both NAVs are reset to the second duration; or,

A second target NAV of the two NAVs is reset to the second duration.
The method of claim 117, wherein when both NAVs are updated to the second duration, a second target NAV of the two NAVs is reset to the second duration. duration, and the other NAV among the two NAVs other than the second target NAV is reset to the second duration following the second target NAV.
The method of claim 117 or 118, wherein the two NAVs maintained for the first time channel include basic NAV and BSS internal NAV,

If the fifth frame belongs to inter-BSS, the second target NAV is the basic NAV;

If the fifth frame belongs to the intra-BSS or the fifth frame cannot be identified as inter-BSS or intra-BSS, the second target NAV is the intra-BSS NAV.
The method of claim 119, wherein the conditions for the basic NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the inter-BSS or the fifth frame cannot be identified as the inter-BSS or intra-BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
The method according to claim 119, wherein the conditions for the BSS internal NAV to be reset to the second duration include at least one of the following:

The fifth frame belongs to the BSS;

The second duration is greater than the current value of the basic NAV;

The receiving end address of the fifth frame is not the address of the node that receives the fifth frame.
A channel usage device, including:

The first communication unit is configured to determine that the first transmission opportunity of the primary channel is terminated, and then send a first frame on the secondary channel, where the first frame is used to indicate that the second transmission opportunity of the secondary channel is terminated.
A channel usage device, including:

A second communication unit configured to receive a first frame on the secondary channel and determine that the second transmission opportunity of the secondary channel is terminated based on the first frame, the first frame being used to indicate the second transmission of the secondary channel. Opportunity terminated.
A channel usage device, including:

The detection unit is configured to detect whether the first transmission opportunity of the primary channel is terminated after sending the fourth physical layer protocol data unit PPDU on the secondary channel; if the first transmission opportunity of the primary channel is terminated, the secondary channel The second transmission opportunity is terminated.
A communication device, including: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute as described in any one of claims 1 to 48 or perform the method described in any one of claims 49 to 93, or perform the method described in any one of claims 94 to 121.
A chip, including: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method described in any one of claims 1 to 48, or executes the claim The method of any one of claims 49 to 93, or performing the method of any one of claims 94 to 121.
A computer-readable storage medium for storing a computer program, the computer program causing the computer to perform the method as described in any one of claims 1 to 48, or to perform the method as described in any one of claims 49 to 93 method, or perform the method described in any one of claims 94 to 121.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform a method as claimed in any one of claims 1 to 48, or to perform a method as described in any one of claims 49 to 93, Or perform the method of any one of claims 94 to 121.
A computer program that causes a computer to perform the method described in any one of claims 1 to 48, or to perform the method described in any one of claims 49 to 93, or to perform claims 94 to 93. The method described in any one of 121.