Channel switching method, access point equipment, station equipment and communication system

Abstract

The embodiment of the invention relates to a channel switching method, access point equipment, station equipment and a communication system. The channel switching method comprises the steps that an access point device AP senses that a main channel communicating with a station device STA is in an OBSS busy state, the main channel is switched to an auxiliary channel to communicate with the STA, and the communication time length of the auxiliary channel is set to be smaller than or equal to the time length set by an NAV of the main channel. Switching to an auxiliary channel to communicate with the STA so as to improve the throughput of a communication system and realize the maximum utilization of channel resources; and the communication duration of the auxiliary channel is set to be less than or equal to the time duration set by the NAV of the main channel, so that other WLAN devices are prevented from competing for the channel within the duration to interfere with the communication of the access point device and the station device in the auxiliary channel.

Description

Channel switching method, access point device, site device and communication system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a channel switching method, an access point device, a station device, and a communication system. Background Art

[0002] Currently, Wi-Fi technology research focuses on Ultra High Reliability (UHR), with the goal of improving the reliability of Wireless Local Area Networks (WLAN) connections, reducing latency, improving manageability, increasing throughput at different signal-to-noise ratio (SNR) levels, and reducing device-level power consumption.

[0003] In order to fully utilize channel resources in UHR and support WLAN devices communicating on auxiliary channels, it is necessary to further improve the mechanism for WLAN devices to communicate on auxiliary channels to meet the transmission requirements of UHR.

[0004] Summary of the Invention

[0005] The embodiments of the present disclosure provide a channel switching method, an access point device, a station device, and a communication system to further improve the communication mechanism of WLAN devices on auxiliary channels.

[0006] In one aspect, an embodiment of the present disclosure provides a channel switching method, the method comprising:

[0007] The access point device AP senses that the main channel for communication with the station device STA is in the OBSS busy state, and switches to the auxiliary channel to communicate with the STA, where the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0008] On the other hand, an embodiment of the present disclosure further provides a channel switching method, the method comprising:

[0009] The station device STA senses that the main channel for communicating with the access point device AP is in the OBSS busy state, and switches to the auxiliary channel to communicate with the AP, where the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0010] On the other hand, an embodiment of the present disclosure further provides an access point device, the access point device comprising:

[0011] The first switching module is used for the access point device AP to sense that the main channel for communication with the station device STA is in an OBSS busy state, and switch to the auxiliary channel to communicate with the STA, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0012] On the other hand, an embodiment of the present disclosure further provides a site device, the site device including:

[0013] The second switching module is used for the site device STA to perceive that the main channel for communication with the access point device AP is in the OBSS busy state, and switch to the auxiliary channel to communicate with the AP, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0014] On the other hand, an embodiment of the present disclosure further provides an access point device, including:

[0015] one or more processors;

[0016] The access point device is used to implement the channel switching method described in the embodiment of the present disclosure.

[0017] On the other hand, an embodiment of the present disclosure further provides a site device, including:

[0018] one or more processors;

[0019] The site device is used to execute the channel switching method described in the embodiment of the present disclosure.

[0020] An embodiment of the present disclosure further provides a communication system, including an access point device and a site device; wherein the access point device is configured to implement the channel switching method described in the embodiment of the present disclosure, and the site device is configured to implement the channel switching method described in the embodiment of the present disclosure.

[0021] An embodiment of the present disclosure further provides a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the channel switching method described in the embodiment of the present disclosure, or executes the channel switching method described in the embodiment of the present disclosure.

[0022] In an embodiment of the present disclosure, an access point device senses that a primary channel for communication with a site device is in an OBSS busy state, and switches to a secondary channel to communicate with the STA to improve the throughput of the communication system and maximize channel resource utilization; and sets the communication duration of the secondary channel to be less than or equal to the time length set by the NAV of the primary channel to prevent other WLAN devices from competing for the channel during this duration and interfering with the communication between the access point device and the site device on the secondary channel.

[0023] Additional aspects and advantages of the embodiments of the present disclosure will be given in part in the following description, which will become apparent from the following description or be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0025] FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0026] FIG2 is one of exemplary interaction diagrams of a method provided according to an embodiment of the present disclosure;

[0027] FIG3 is a third exemplary interaction diagram of a method provided according to an embodiment of the present disclosure;

[0028] FIG4 is a flow chart of a channel switching method according to an embodiment of the present disclosure;

[0029] FIG5 is a second flow chart of a channel switching method according to an embodiment of the present disclosure;

[0030] FIG6 is a second exemplary interaction diagram of a method according to an embodiment of the present disclosure;

[0031] FIG7 is a fourth exemplary interaction diagram of a method provided according to an embodiment of the present disclosure;

[0032] FIG8 is a schematic structural diagram of an access point device proposed in an embodiment of the present disclosure;

[0033] FIG9 is a schematic structural diagram of a site device proposed in an embodiment of the present disclosure;

[0034] FIG10 is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure;

[0035] FIG11 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] The embodiments of the present disclosure provide a channel switching method, an access point device, a station device, and a communication system.

[0037] In a first aspect, an embodiment of the present disclosure provides a channel switching method, the method comprising:

[0038] The access point device AP senses that the main channel for communication with the station device STA is in the OBSS busy state, and switches to the auxiliary channel to communicate with the STA, where the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0039] In the above embodiment, the main channel is in the OBSS busy state and switches to the auxiliary channel to communicate with the STA to improve the throughput of the communication system and maximize the utilization of channel resources; and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel to avoid other WLAN devices competing for the channel during this duration and interfering with the communication between the access point device and the site device on the auxiliary channel.

[0040] In combination with some embodiments of the first aspect, in some embodiments, sensing that the auxiliary channel is in an idle state, and communicating with the STA on the auxiliary channel;

[0041] or,

[0042] It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

[0043] In the above embodiment, when it is determined to switch to the auxiliary channel for communication, whether the auxiliary channel is in an idle state is continuously sensed; for example, the busy state of the auxiliary channel is still sensed through a CCA operation or a NAV operation.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, communicating with the STA on the auxiliary channel includes:

[0045] A first RTS frame is sent to the STA, and a duration of the first RTS frame is set as a communication duration of the auxiliary channel.

[0046] In the above embodiment, after switching to the auxiliary channel, a first RTS frame is sent to the site device, and the duration (duration field) of the first RTS frame in the RTS frame is set to the communication duration of the auxiliary channel to instruct the site device to send data frames within the communication duration.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, performing the random backoff operation includes:

[0048] If the random backoff window duration is longer than the NAV duration set for the primary channel, or if the random backoff window duration plus the duration required for data transmission is longer than the NAV duration set for the primary channel, the communication on the secondary channel is abandoned and / or switched to the primary channel for sensing.

[0049] or,

[0050] The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0051] In the above embodiment, when sensing that the auxiliary channel is busy, the access point device 102 delays access and uses an exponential backoff algorithm to avoid conflicts, waiting until the connection is idle again, thereby forming an access delay, which is a random backoff process.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, switching to the auxiliary channel to communicate with the STA includes:

[0053] During the communication between the auxiliary channel and the STA, the NAV duration set on the primary channel increases, and after the current communication with the STA is completed, the communication with the STA continues on the auxiliary channel.

[0054] In the above embodiment, during the secondary channel communication process, if the NAV setting of the primary channel changes, for example, the NAV time setting determined based on the OBSS communication becomes longer, the two parties can continue to communicate in the secondary channel after completing the communication to improve the system throughput.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0056] During the initial association process, a first wireless frame is sent to the STA; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0057] In the above embodiment, the first identification information is used to identify whether the access point device supports switching to the auxiliary channel for communication when the primary channel is in the OBSS busy state. This facilitates the STA or other WLAN device to determine, after receiving the first wireless frame, whether the access point device will switch to the auxiliary channel for communication when the primary channel is in the OBSS busy state based on the first identification information.

[0058] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0059] During the initial association process, a second wireless frame sent by the STA is received; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0060] In the above embodiment, the second wireless frame sent by the STA is received, and the STA identifies, through the second identification information, whether the STA supports switching to the auxiliary channel for communication when the primary channel is in the OBSS busy state, so that after the access point device or other WLAN device receives the second wireless frame, it is determined, based on the second identification information, whether the STA will switch to the auxiliary channel for communication when the primary channel is in the OBSS busy state.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

[0062] During an initial association process, negotiate parameter information of the auxiliary channel with the STA through the first radio frame;

[0063] After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the STA through a newly defined radio frame.

[0064] In the above embodiment, parameter information of the auxiliary channel may be negotiated during the association process, for example, and may be carried in a UHR information element or a UHR operation information element. For example, in the first wireless frame, the parameter information of the auxiliary channel may be implicitly indicated by the first identification information in the UHR information element as the parameter established by the AP and the STA during the initial association process; taking the bandwidth parameter as an example, if the first identification information indicates that the AP supports switching to the auxiliary channel for communication when the primary channel is in the OBSS busy state; and the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20 MHz, then the secondary bandwidth of the auxiliary channel is also 20 MHz.

[0065] In combination with some embodiments of the first aspect, in some embodiments, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established during the initial association process.

[0066] In the above embodiment, for example, the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20 MHz, and the bandwidth of the secondary channel of the auxiliary channel is also 20 MHz.

[0067] In a second aspect, an embodiment of the present disclosure provides a channel switching method, the method comprising:

[0068] The station device STA senses that the main channel for communicating with the access point device AP is in the OBSS busy state, and switches to the auxiliary channel to communicate with the AP, where the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0069] In conjunction with some embodiments of the second aspect, in some embodiments, switching to the auxiliary channel to communicate with the AP includes:

[0070] sensing that the auxiliary channel is in an idle state, and communicating with the AP on the auxiliary channel;

[0071] or,

[0072] It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

[0073] In conjunction with some embodiments of the second aspect, in some embodiments, communicating with the AP on the auxiliary channel includes:

[0074] A second RTS frame is sent to the AP, and the duration of the second RTS frame is set as the communication duration of the auxiliary channel.

[0075] In conjunction with some embodiments of the second aspect, in some embodiments, performing the random backoff operation includes:

[0076] If the random backoff window duration is longer than the NAV duration set for the primary channel, or if the random backoff window duration plus the duration required for data transmission is longer than the NAV duration set for the primary channel, the communication on the secondary channel is abandoned and / or switched to the primary channel for sensing.

[0077] or,

[0078] The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0079] In conjunction with some embodiments of the second aspect, in some embodiments, switching to the auxiliary channel to communicate with the AP includes:

[0080] During the communication between the auxiliary channel and the AP, the NAV duration set on the primary channel increases, and after the current communication with the AP is completed, the communication with the AP continues on the auxiliary channel.

[0081] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0082] During the initial association process, a first wireless frame sent by the AP is received; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0083] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0084] During the initial association process, a second wireless frame is sent to the AP; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0085] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes at least one of the following:

[0086] During the initial association process, negotiating parameter information of the auxiliary channel with the AP through the second radio frame;

[0087] After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the AP through a newly defined radio frame.

[0088] In combination with some embodiments of the second aspect, in some embodiments, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established during the initial association process.

[0089] In a third aspect, an embodiment of the present disclosure further provides an access point device, comprising at least one of a determination module and a sending module; wherein the access point device is configured to execute the optional implementation of the first aspect.

[0090] In a fourth aspect, an embodiment of the present disclosure further provides a site device, including: a first receiving module; wherein the above-mentioned site device is used to execute the optional implementation method of the second aspect.

[0091] In a fifth aspect, an embodiment of the present disclosure further provides an access point device, including:

[0092] one or more processors;

[0093] The access point device is used to execute the optional implementation of the first aspect.

[0094] In a sixth aspect, an embodiment of the present disclosure further provides a site device, including:

[0095] one or more processors;

[0096] The site device is used to execute the optional implementation of the second aspect.

[0097] In a seventh aspect, an embodiment of the present disclosure further provides a communication system, comprising an access point device and a site device; wherein the access point device is configured to perform the optional implementation method described in the first aspect, and the site device is configured to perform the optional implementation method described in the second aspect.

[0098] In an eighth aspect, an embodiment of the present disclosure further provides a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute the optional implementation methods described in the first and second aspects.

[0099] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0100] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0101] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0102] It is understandable that the aforementioned access point devices, station devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0103] The embodiments of the present disclosure provide a channel switching method, an access point device, a station device, and a communication system. In some embodiments, the terms channel switching method, signal transmission method, wireless frame transmission method, etc. are interchangeable, and the terms information processing system, communication system, etc. are interchangeable.

[0104] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0105] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0106] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0107] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0108] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0109] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0110] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0111] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0112] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0113] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0114] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0115] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0116] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0117] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0118] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0119] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0120] As shown in FIG1 , a communication system 100 includes a station device (STA) 101 and an access point device (AP) 102 .

[0121] In some embodiments, the site device 101 includes, for example, a wireless communication chip, a wireless sensor, or a wireless communication terminal that supports WiFi communication. Optionally, the wireless communication terminal includes, but is not limited to, at least one of a mobile phone, a wearable device, an Internet of Things device that supports WiFi communication, a car with WiFi communication, a smart car, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device used in industrial control, a wireless terminal device used in self-driving, a wireless terminal device used in remote medical surgery, a wireless terminal device used in a smart grid, a wireless terminal device used in transportation safety, a wireless terminal device used in a smart city, and a wireless terminal device used in a smart home.

[0122] Specifically, the station device 101 may be a terminal device or network device with a Wireless Fidelity (WiFi) chip. Optionally, the station device 101 may support multiple WLAN standards such as 802.11ax, 802.11be, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a, as well as the next generation 802.11 protocol, but is not limited thereto.

[0123] In some embodiments, the access point device 102 can be an access point for a mobile terminal to enter a wired network. The AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to the Ethernet. Specifically, the AP can be a terminal device or a network device with a wireless fidelity chip. Optionally, the AP can support multiple WLAN standards such as 802.11ax, 802.11be, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a, as well as support the next generation 802.11 protocol, but is not limited to these.

[0124] Optionally, in an embodiment of the present disclosure, the AP and STA may be devices supporting multiple connections, for example, they may be represented as a multi-connection access point device (AP MLD) and a multi-connection site device (Non-Access Point Multi-Link Device, Non-AP MLD), respectively; the AP MLD may represent an access point supporting multi-connection communication functions, and the non-AP MLD may represent a site supporting multi-connection communication functions.

[0125] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0126] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0127] The various embodiments of the present disclosure can be applied to wireless local area networks (WLANs), such as those using the 802.11 series of protocols. In a WLAN, a Basic Service Set (BSS) is a fundamental component of a WLAN. A BSS network consists of station devices with some association within a specific coverage area. One scenario of association is that stations communicate directly with each other in an ad hoc network, which is called an Independent Basic Service Set (IBSS). Another more common scenario is that in a BSS network, there is only one central station dedicated to managing the BSS, called an access point, and all other STAs in the network are associated with it. Other stations in the BSS network that are not the central station are called terminals, also called non-AP STAs. Terminals and non-AP STAs are collectively referred to as STAs. When describing STAs, there is no need to distinguish between APs and non-AP STAs. In the same BSS network, due to distance, transmission power, and other factors, a STA cannot detect other STAs that are farther away from it, and the two STAs are each other's hidden nodes.

[0128] FIG2 is one of the interactive schematic diagrams of the channel switching method according to an embodiment of the present disclosure. As shown in FIG2 , the method includes:

[0129] In step 200, the access point device AP senses that the main channel for communicating with the station device STA is in the OBSS busy state, and switches to the auxiliary channel to communicate with the STA. The communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel; for example, the communication duration of the auxiliary channel is set to the time length set by the NAV of the main channel, or not greater than the time length set by the NAV of the main channel (the time length set by the NAV is, for example, the time length of the perceived busy main channel).

[0130] In a wireless local area network, a Basic Service Set (BSS) can be composed of an AP and one or more stations (STAs) communicating with the AP. If the coverage of two or more BSSs overlap, an Overlapping Basic Service Set (BSS, OBSS) is formed.

[0131] In WLANs, channels are typically divided into primary channels and secondary channels (also known as sub-channels). A secondary channel can contain one or more sub-channels. For example, if the basic bandwidth unit is 20 MHz, when the channel bandwidth is 20 MHz, there is only one primary channel with a bandwidth of 20 MHz. When the channel bandwidth is greater than 20 MHz, there is one channel with a bandwidth of 20 MHz as the primary channel, and the remaining one or more 20 MHz channels are secondary channels. The primary 20 MHz channel is the common channel of operation for stations that are members of the basic service set (BSS). Stations in the BSS can compete for channel resources on the primary 20 MHz channel.

[0132] During the channel contention process, if the primary channel is occupied by other devices in the same OBSS as the access point device 102, for example, other devices send physical protocol data units (PPDUs) on the primary channel, then the primary channel is in the OBSS busy state. The access point device 102 can sense that the primary channel is in the OBSS busy state through a clear channel assessment (CCA) operation, an energy detection (ED) operation, or a NAV operation. If the primary channel is in the OBSS busy state, in order to fully utilize channel resources, it switches to the auxiliary channel to communicate with the site device 101, schedules the site device 101 to the auxiliary channel, and sends and receives data with the site device 101, thereby improving the communication system throughput and maximizing the utilization of channel resources.

[0133] In addition, the access point device 102 also sets the communication duration of the auxiliary channel to the time length set by the network allocation vector (NAV) of the primary channel. After the access point device 102 obtains the channel through competition, it uses the NAV method to set the NAV in the Duration field of the Media Access Control (MAC) frame header included in each frame it transmits, or to set the NAV based on the length of the L-SIG field in the decoded physical header (PHY preamble), or both. This notifies other WLAN devices of the duration of the channel used by the WLAN device currently obtaining the channel. Other WLAN devices that hear this frame will remain silent for this duration, i.e., stop competing for the channel or use a backoff mechanism, and reconnect when the channel is idle. In this way, the communication duration with the station device 101 on the auxiliary channel is set to be less than or equal to the time length set by the NAV of the primary channel. Since other WLAN devices remain silent and stop competing for the channel during this duration, they will not interfere with the communication between the access point device 102 and the station device 101 on the auxiliary channel.

[0134] In the embodiment of the present disclosure, the access point device 102 senses that the main channel for communication with the site device 101 is in an OBSS busy state, and switches to the auxiliary channel to communicate with the STA to improve the throughput of the communication system and maximize the utilization of channel resources; and sets the communication duration of the auxiliary channel to be less than or equal to the time length set by the NAV of the main channel to prevent other WLAN devices from competing for the channel during this duration and interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel.

[0135] After step 200, step 211 or step 221 is executed according to whether the auxiliary channel is in a busy state.

[0136] Step 211 : Sense that the auxiliary channel is in an idle state, communicate with the STA on the auxiliary channel, and execute step 212 .

[0137] When the access point device 102 determines to switch to the auxiliary channel for communication, it continues to sense whether the auxiliary channel is in an idle state; for example, it still senses the busy state of the auxiliary channel through a CCA operation or a NAV operation; if the auxiliary channel is in an idle state, step 212 is executed.

[0138] Step 212: Send a first request to send (RTS) frame to the STA, and set the duration of the first RTS frame to the communication duration of the auxiliary channel.

[0139] After switching to the auxiliary channel, the access point device 102 sends a first RTS frame to the site device 101, and sets the duration (duration field) of the first RTS frame in the RTS frame to the communication duration of the auxiliary channel, or sets the Length field length in the L-SIG field in the decoded physical header (PHY preamble) to the communication duration of the auxiliary channel, or sets both at the same time to instruct the site device 101 to send data frames within the communication duration.

[0140] The duration indicated by the duration field of the first RTS frame is no longer than the NAV duration set in the primary channel, thereby preventing other WLAN devices from competing for the channel within the duration and interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel.

[0141] Step 221: It is sensed that the auxiliary channel is busy, and a random backoff operation is performed.

[0142] When sensing that the auxiliary channel is busy, the access point device 102 delays access and uses an exponential backoff algorithm to avoid conflicts, waiting until the connection is idle again, thereby forming an access delay, which is a random backoff process.

[0143] Specifically, when performing a random backoff operation, the access point device 102 does not immediately transmit data, but instead begins transmitting data after a period of time. For example, the access point device 102 may randomly select a value (referred to as a random number) within the contention window (CW), i.e., [0, CW duration]. After detecting that the channel is idle for the following distributed interframe space (DIFS) interval, the access point device 102 begins counting down, decrementing the random number by 1 for every slot time (typically 9 microseconds (us)) of channel idle time. Before the random number decrements to 0, if the channel is busy during a slot time, the count is paused. The count is then resumed when the channel transitions from busy to idle, and data transmission begins on the channel when the random number decrements to 0. Possible values ​​of CW include 31, 63, 127, 255, 511, and 1023, and the corresponding backoff times are 279 microseconds, 567 microseconds, 1143 microseconds, 2295 microseconds, 4599 microseconds, and 9207 microseconds, respectively. DCF refers to the distributed coordination function (DCF).

[0144] In some embodiments, performing the random backoff operation includes step 222 or step 223 .

[0145] Step 222: If the random backoff window duration is greater than the NAV duration set in the main channel, or the random backoff window duration plus the duration required to transmit data is greater than the NAV duration set in the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0146] Among them, when the random backoff window duration is greater than the NAV duration set for the main channel, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the NAV duration has ended before the random number is reduced to 0. At this time, other WLAN devices may compete for the channel within the time after the NAV duration ends, interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, at this time, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0147] Step 223: The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0148] Among them, if the random backoff window duration is less than or equal to the NAV duration set for the primary channel, other WLAN devices will not compete for the channel within the NAV duration, and will not interfere with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, the access point device 102 continues to sense the status of the auxiliary channel.

[0149] In some embodiments, the switching to the auxiliary channel to communicate with the STA includes:

[0150] During the communication between the auxiliary channel and the STA, the NAV duration set on the primary channel increases, and after the current communication with the STA is completed, the communication with the STA continues on the auxiliary channel.

[0151] During secondary channel communication, if the NAV setting of the primary channel changes, for example, the NAV time setting determined based on OBSS communication becomes longer, the two parties can continue to communicate in the secondary channel after completing the communication to improve system throughput.

[0152] In some embodiments, the method further comprises:

[0153] Step 201: During the initial association process, a first wireless frame is sent to the STA; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0154] The first wireless frame includes at least one of a beacon frame, a probe response frame, an association response frame, and a re-association response frame, but the embodiment of the present disclosure is not limited thereto.

[0155] During the initial association process, the access point device 102 carries first identification information in the first radio frame. The first identification information identifies whether the access point device 102 supports switching to the secondary channel for communication when the primary channel is in the OBSS busy state. This facilitates the STA or other WLAN device to determine, based on the first identification information, whether the access point device 102 will switch to the secondary channel for communication when the primary channel is in the OBSS busy state after receiving the first radio frame.

[0156] In some embodiments, the method further comprises:

[0157] Step 202: During the initial association process, a second wireless frame sent by the STA is received; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0158] The second radio frame includes at least one of a probe request frame, an association request frame, and a re-association request frame, but the embodiment of the present disclosure is not limited thereto.

[0159] During the initial association process, the access point device 102 receives a second radio frame sent by the STA, and the STA identifies, through the second identification information, whether the STA supports switching to the auxiliary channel for communication when the primary channel is in the OBSS busy state. This facilitates the access point device 102 or other WLAN devices to determine, based on the second identification information, whether the STA will switch to the auxiliary channel for communication when the primary channel is in the OBSS busy state after receiving the second radio frame.

[0160] In some embodiments, the method further comprises:

[0161] Step 203: During the initial association process, parameter information of the auxiliary channel is negotiated with the STA via the first radio frame.

[0162] During the initial association process, the access point device 102 may negotiate parameter information for the secondary channel during the association process, such as information carried in a UHR information element or a UHR operation information element. For example, in the first radio frame, the first identification information in the UHR information element may implicitly indicate that the parameter information for the secondary channel is the parameter established by the AP and the STA during the initial association process. Taking bandwidth parameters as an example, if the first identification information indicates that the AP supports switching to the secondary channel for communication when the primary channel is in the OBSS busy state, and the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20 MHz, then the secondary bandwidth of the secondary channel is also 20 MHz.

[0163] In some embodiments, the method further comprises:

[0164] Step 204: After the initial association process is completed, negotiate parameter information of the auxiliary channel with the STA through a newly defined radio frame.

[0165] The AP and the STA may also define a new radio frame to negotiate parameter information of the auxiliary channel.

[0166] In some embodiments, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established during the initial association process.

[0167] For example, if the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20 MHz, then the bandwidth of the secondary channel of the auxiliary channel is also 20 MHz.

[0168] The channel switching method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 200 can be implemented as an independent embodiment, step 211 can be implemented as an independent embodiment, step 212 can be implemented as an independent embodiment, step 221 can be implemented as an independent embodiment, step 222 can be implemented as an independent embodiment, step 223 can be implemented as an independent embodiment, step 201 can be implemented as an independent embodiment, step 202 can be implemented as an independent embodiment, step 203 can be implemented as an independent embodiment, and step 204 can be implemented as an independent embodiment; the combination of step 200 and step 211 can be implemented as an independent embodiment, the combination of step 200 and step 221 can be implemented as an independent embodiment, the combination of step 211 and step 212 can be implemented as an independent embodiment, the combination of step 221 and step 222 can be implemented as an independent embodiment, the combination of step 221 and step 223 can be implemented as an independent embodiment, and the combination of step 201 and step 202 can be implemented as an independent embodiment, but is not limited thereto.

[0169] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0170] FIG6 is a second interactive diagram of a channel switching method according to an embodiment of the present disclosure. As shown in FIG6 , the method includes:

[0171] Step 621: It is sensed that the auxiliary channel is busy, and a random backoff operation is performed.

[0172] When the access point device 102 senses that the auxiliary channel is busy, the access point device 102 delays access and uses an exponential backoff algorithm to avoid conflicts, waiting until the connection is idle again, thereby forming an access delay, which is a random backoff process.

[0173] Specifically, when performing a random backoff operation, the access point device 102 does not immediately transmit data, but instead begins transmitting data after a period of time. For example, the access point device 102 may randomly select a value (referred to as a random number) within the contention window (CW), i.e., [0, CW duration]. After detecting that the channel is idle for the following distributed interframe space (DIFS) interval, the access point device 102 begins counting down, decrementing the random number by 1 for every slot time (typically 9 microseconds (us)) of channel idle time. Before the random number decrements to 0, if the channel is busy during a slot time, the count is paused. The count is then resumed when the channel transitions from busy to idle, and data transmission begins on the channel when the random number decrements to 0. Possible values ​​for CW include 31, 63, 127, 255, 511, and 1023, with corresponding backoff times of 279 microseconds, 567 microseconds, 1143 microseconds, 2295 microseconds, 4599 microseconds, and 9207 microseconds, respectively. DCF refers to the distributed coordination function (DCF).

[0174] Step 622: If the random backoff window duration is greater than the NAV duration set in the main channel, or the random backoff window duration plus the duration required to transmit data is greater than the NAV duration set in the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0175] Among them, when the random backoff window duration is greater than the NAV duration set for the main channel, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the NAV duration has ended before the random number is reduced to 0. At this time, other WLAN devices may compete for the channel within the time after the NAV duration ends, interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, at this time, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0176] The channel switching method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 621 may be implemented as an independent embodiment, step 622 may be implemented as an independent embodiment, and the combination of step 621 and step 622 may be implemented as an independent embodiment, but is not limited thereto.

[0177] FIG3 is a third interactive diagram of a channel switching method according to an embodiment of the present disclosure. As shown in FIG3 , the method includes:

[0178] In step 300, the station device STA senses that the main channel for communicating with the access point device AP is in the OBSS busy state, and switches to the auxiliary channel to communicate with the AP. The communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0179] During channel contention, if the primary channel is occupied by another device in the same OBSS as the station device 101, for example, if another device sends a PPDU on the primary channel, the primary channel is in the OBSS busy state. The station device 101 can detect that the primary channel is in the OBSS busy state through a CCA operation or a NAV operation. If the primary channel is in the OBSS busy state, in order to fully utilize channel resources, it switches to the secondary channel to communicate with the AP, thereby improving communication system throughput and maximizing channel resource utilization.

[0180] In addition, the site device 101 also sets the communication duration of the auxiliary channel to be less than or equal to the time length set by the NAV of the primary channel. After the site device 101 competes for the channel, it uses the NAV method to set the NAV in the Duration field of the MAC frame header included in each frame it sends to notify other WLAN devices of the duration of use of the channel by the WLAN device currently obtaining the channel. Other WLAN devices that hear the frame will remain silent during this duration, that is, stop competing for the channel. In this way, the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the primary channel. Since other WLAN devices remain silent during this duration and stop competing for the channel, they will not interfere with the communication between the access point device 102 and the site device 101 on the auxiliary channel.

[0181] In the embodiment of the present disclosure, the site device 101 senses that the main channel for communication between it and the access point device 102 is in an OBSS busy state, and switches to the auxiliary channel to communicate with the access point device 102 to improve the throughput of the communication system and maximize the utilization of channel resources; and sets the communication duration of the auxiliary channel to be less than or equal to the time length set by the NAV of the main channel to prevent other WLAN devices from competing for the channel during the duration and interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel.

[0182] After step 300, step 311 or step 321 is executed according to whether the auxiliary channel is in a busy state.

[0183] Step 311 : Sense that the auxiliary channel is in an idle state, communicate with the STA on the auxiliary channel, and execute step 312 .

[0184] When the site device 101 determines to switch to the auxiliary channel communication, it continues to sense whether the auxiliary channel is in an idle state; for example, it still senses the busy state of the auxiliary channel through a CCA operation or a NAV operation; if the auxiliary channel is in an idle state, step 312 is executed.

[0185] Step 312: Send a second request to send (RTS) frame to the AP, and set the duration of the second RTS frame to the communication duration of the auxiliary channel.

[0186] After switching to the auxiliary channel, the site device 101 sends a second RTS frame to the AP, and sets the duration (duration field) of the second RTS frame to the communication duration of the auxiliary channel to instruct the AP to send data frames within the communication duration.

[0187] The duration indicated by the duration field of the second RTS frame is no longer than the NAV duration set in the primary channel, thereby preventing other WLAN devices from competing for the channel within the duration and interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel.

[0188] Step 321: It is sensed that the auxiliary channel is busy, and a random backoff operation is performed.

[0189] Sensing that the auxiliary channel is busy, the station device 101 delays access and uses an exponential backoff algorithm to avoid conflicts, waiting until the connection is idle again, thereby forming an access delay, which is a random backoff process.

[0190] Specifically, when performing a random backoff operation, station device 101 does not send data immediately, but instead begins sending data after a period of time. For example, station device 101 may randomly select a value (referred to as a random number) within the range [0, CW duration]. After detecting that the channel is idle for the following DIFS period, station device 101 begins counting down, decreasing the random number by 1 for each slot period of channel idle time (typically 9 microseconds (µs)). Before the random number decreases to 0, if the channel is busy during a slot, the count is paused. Counting is resumed when the channel transitions from busy to idle, and data transmission begins on the channel when the random number decreases to 0. Possible CW values ​​include 31, 63, 127, 255, 511, and 1023, corresponding to backoff times of 279 µs, 567 µs, 1143 µs, 2295 µs, 4599 µs, and 9207 µs, respectively. Here, DCF refers to a distributed coordination function (DCF).

[0191] In some embodiments, performing the random backoff operation includes step 322 or step 323 .

[0192] Step 322: If the random backoff window duration is greater than the NAV duration set for the main channel, or the random backoff window duration plus the duration required to transmit data is greater than the NAV duration set for the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0193] Among them, when the random backoff window duration is greater than the NAV duration set for the main channel, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the NAV duration has ended before the random number is reduced to 0. At this time, other WLAN devices may compete for the channel within the time after the NAV duration ends, interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, at this time, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0194] Step 323: The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0195] Among them, if the random backoff window duration is less than or equal to the NAV duration set for the primary channel, other WLAN devices will not compete for the channel within the NAV duration, and will not interfere with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, the access point device 102 continues to sense the status of the auxiliary channel.

[0196] In some embodiments, switching to the auxiliary channel to communicate with the AP includes:

[0197] During the communication between the auxiliary channel and the AP, the NAV duration set on the primary channel increases, and after the current communication with the AP is completed, the communication with the AP continues on the auxiliary channel.

[0198] During secondary channel communication, if the NAV setting of the primary channel changes, for example, the NAV time setting determined based on OBSS communication becomes longer, the two parties can continue to communicate in the secondary channel after completing the communication to improve system throughput.

[0199] In some embodiments, the method further comprises:

[0200] Step 301: During the initial association process, a first wireless frame sent by the AP is received; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP for communicating on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0201] The first wireless frame includes at least one of a beacon frame, a probe response frame, an association response frame, and a re-association response frame, but the embodiment of the present disclosure is not limited thereto.

[0202] During the initial association process, the access point device 102 carries first identification information in the first radio frame. The first identification information identifies whether the access point device 102 supports switching to the secondary channel for communication when the primary channel is in the OBSS busy state. This facilitates the STA or other WLAN device to determine, based on the first identification information, whether the access point device 102 will switch to the secondary channel for communication when the primary channel is in the OBSS busy state after receiving the first radio frame.

[0203] In some embodiments, the method further comprises:

[0204] Step 302: During the initial association process, a second wireless frame is sent to the AP; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0205] The second radio frame includes at least one of a probe request frame, an association request frame, and a re-association request frame, but the embodiment of the present disclosure is not limited thereto.

[0206] During the initial association process, a second wireless frame is sent to the access point device 102, and the STA identifies, through the second identification information, whether the STA supports switching to the auxiliary channel for communication when the primary channel is in the OBSS busy state. This facilitates the access point device 102 or other WLAN devices to determine, based on the second identification information, whether the STA will switch to the auxiliary channel for communication when the primary channel is in the OBSS busy state after receiving the second wireless frame.

[0207] In some embodiments, the method further comprises:

[0208] Step 303: During the initial association process, negotiate parameter information of the auxiliary channel with the STA through the second radio frame.

[0209] The parameter information of the auxiliary channel can be negotiated during the association process, for example, it can be carried in the UHR information element or the UHR operation information element. For example, in the second wireless frame, the second identification information in the UHR information element can implicitly indicate that the parameter information of the auxiliary channel is the parameter established by the AP and the STA during the initial association process; taking the bandwidth parameter as an example, if the first identification information indicates that the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state; and the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20MHz, then the secondary bandwidth of the auxiliary channel is also 20MHz.

[0210] In some embodiments, the method further comprises:

[0211] Step 304: After the initial association process is completed, negotiate parameter information of the auxiliary channel with the STA through a newly defined radio frame.

[0212] The AP and the STA may also define a new radio frame to negotiate parameter information of the auxiliary channel.

[0213] In some embodiments, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established during the initial association process.

[0214] For example, if the bandwidth of the secondary channel negotiated by the AP and the STA during the initial association process is 20 MHz, then the bandwidth of the secondary channel of the auxiliary channel is also 20 MHz.

[0215] The channel switching method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 300 can be implemented as an independent embodiment, step 311 can be implemented as an independent embodiment, step 312 can be implemented as an independent embodiment, step 321 can be implemented as an independent embodiment, step 322 can be implemented as an independent embodiment, step 323 can be implemented as an independent embodiment, step 301 can be implemented as an independent embodiment, step 302 can be implemented as an independent embodiment, step 303 can be implemented as an independent embodiment, and step 304 can be implemented as an independent embodiment; the combination of step 300 and step 311 can be implemented as an independent embodiment, the combination of step 300 and step 321 can be implemented as an independent embodiment, the combination of step 311 and step 312 can be implemented as an independent embodiment, the combination of step 321 and step 322 can be implemented as an independent embodiment, the combination of step 321 and step 323 can be implemented as an independent embodiment, and the combination of step 301 and step 302 can be implemented as an independent embodiment, but is not limited thereto.

[0216] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3 .

[0217] FIG7 is a fourth interactive diagram of a channel switching method according to an embodiment of the present disclosure. As shown in FIG7 , the method includes:

[0218] Step 721: It is sensed that the auxiliary channel is busy, and a random backoff operation is performed.

[0219] Sensing that the auxiliary channel is busy, the station device 101 delays access and uses an exponential backoff algorithm to avoid conflicts, waiting until the connection is idle again, thereby forming an access delay, which is a random backoff process.

[0220] Specifically, when performing a random backoff operation, station device 101 does not send data immediately, but instead begins sending data after a period of time. For example, station device 101 may randomly select a value (referred to as a random number) within the range [0, CW duration]. After detecting that the channel is idle for the following DIFS period, station device 101 begins counting down, decreasing the random number by 1 for each slot period of channel idle time (typically 9 microseconds (µs)). Before the random number decreases to 0, if the channel is busy during a slot, the count is paused. Counting is resumed when the channel transitions from busy to idle, and data transmission begins on the channel when the random number decreases to 0. Possible CW values ​​include 31, 63, 127, 255, 511, and 1023, corresponding to backoff times of 279 µs, 567 µs, 1143 µs, 2295 µs, 4599 µs, and 9207 µs, respectively. Here, DCF refers to a distributed coordination function (DCF).

[0221] Step 722: If the random backoff window duration is greater than the NAV duration set for the main channel, or the random backoff window duration plus the duration required to transmit data is greater than the NAV duration set for the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0222] Among them, when the random backoff window duration is greater than the NAV duration set for the main channel, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the NAV duration has ended before the random number is reduced to 0. At this time, other WLAN devices may compete for the channel within the time after the NAV duration ends, interfering with the communication between the access point device 102 and the site device 101 on the auxiliary channel. Therefore, at this time, or when the random backoff window duration plus the time required to transmit data is greater than the NAV duration set in the main channel, the communication on the auxiliary channel is abandoned and / or switched to the main channel for perception.

[0223] The channel switching method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 721 may be implemented as an independent embodiment, step 722 may be implemented as an independent embodiment, and the combination of step 621 and step 622 may be implemented as an independent embodiment, but is not limited thereto.

[0224] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0225] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0226] In some embodiments, terms such as wireless access scheme and waveform may be used interchangeably.

[0227] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0228] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparing numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0229] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0230] FIG4 is a flow chart showing one of the channel switching methods according to an embodiment of the present disclosure.

[0231] As shown in FIG4 , the above method may be applied to an access point device 102, and the above method includes:

[0232] Step 401: The access point device AP senses that the main channel for communicating with the station device STA is in the OBSS busy state, and switches to the auxiliary channel to communicate with the STA. The communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0233] Optionally, in the embodiment of the present disclosure, the switching to the auxiliary channel to communicate with the STA includes:

[0234] sensing that the auxiliary channel is in an idle state, and communicating with the STA on the auxiliary channel;

[0235] or,

[0236] It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

[0237] Optionally, in the embodiment of the present disclosure, the communicating with the STA on the auxiliary channel includes:

[0238] A first RTS frame is sent to the STA, and a duration of the first RTS frame is set as a communication duration of the auxiliary channel.

[0239] Optionally, in the embodiment of the present disclosure, performing the random backoff operation includes:

[0240] If the random backoff window duration is longer than the NAV duration set for the primary channel, or if the random backoff window duration plus the duration required for data transmission is longer than the NAV duration set for the primary channel, the communication on the secondary channel is abandoned and / or switched to the primary channel for sensing.

[0241] or,

[0242] The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0243] Optionally, in the embodiment of the present disclosure, the switching to the auxiliary channel to communicate with the STA includes:

[0244] During the communication between the auxiliary channel and the STA, the NAV duration set on the primary channel increases, and after the current communication with the STA is completed, the communication with the STA continues on the auxiliary channel.

[0245] Optionally, in the embodiment of the present disclosure, the method further includes:

[0246] During the initial association process, a first wireless frame is sent to the STA; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0247] Optionally, in the embodiment of the present disclosure, the method further includes:

[0248] During the initial association process, a second wireless frame sent by the STA is received; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0249] Optionally, in the embodiment of the present disclosure, the method further includes at least one of the following:

[0250] During an initial association process, negotiate parameter information of the auxiliary channel with the STA through the first radio frame;

[0251] After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the STA through a newly defined radio frame.

[0252] Optionally, in an embodiment of the present disclosure, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is a working bandwidth established during the initial association process.

[0253] FIG5 is a second flow chart of a channel switching method according to an embodiment of the present disclosure.

[0254] As shown in FIG5 , the above method may be applied to the site device 104, and the above method includes:

[0255] Step 501: The station device STA senses that the main channel for communicating with the access point device AP is in the OBSS busy state, and switches to the auxiliary channel to communicate with the AP. The communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0256] Optionally, in the embodiment of the present disclosure, the switching to the auxiliary channel to communicate with the AP includes:

[0257] sensing that the auxiliary channel is in an idle state, and communicating with the AP on the auxiliary channel;

[0258] or,

[0259] It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

[0260] Optionally, in the embodiment of the present disclosure, the communicating with the AP on the auxiliary channel includes:

[0261] A second RTS frame is sent to the AP, and the duration of the second RTS frame is set as the communication duration of the auxiliary channel.

[0262] Optionally, in the embodiment of the present disclosure, performing the random backoff operation includes:

[0263] If the random backoff window duration is longer than the NAV duration set for the primary channel, or if the random backoff window duration plus the duration required for data transmission is longer than the NAV duration set for the primary channel, the communication on the secondary channel is abandoned and / or switched to the primary channel for sensing.

[0264] or,

[0265] The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

[0266] Optionally, in the embodiment of the present disclosure, the switching to the auxiliary channel to communicate with the AP includes:

[0267] During the communication between the auxiliary channel and the AP, the NAV duration set on the primary channel increases, and after the current communication with the AP is completed, the communication with the AP continues on the auxiliary channel.

[0268] Optionally, in the embodiment of the present disclosure, the method further includes:

[0269] During the initial association process, a first wireless frame sent by the AP is received; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0270] Optionally, in the embodiment of the present disclosure, the method further includes:

[0271] During the initial association process, a second wireless frame is sent to the AP; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

[0272] Optionally, in the embodiment of the present disclosure, the method further includes at least one of the following:

[0273] During the initial association process, negotiating parameter information of the auxiliary channel with the AP through the second radio frame;

[0274] After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the AP through a newly defined radio frame.

[0275] Optionally, in an embodiment of the present disclosure, the parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is a working bandwidth established during the initial association process.

[0276] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0277] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0278] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0279] FIG8 is a schematic diagram of the structure of an access point device according to an embodiment of the present disclosure. As shown in FIG8 , the access point device 800 may include: a first switching module 801 .

[0280] In some embodiments, the above-mentioned first switching module 801 is used for the access point device AP to perceive that the main channel for communication between the access point device AP and the station device STA is in an OBSS busy state, and switch to the auxiliary channel to communicate with the STA, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0281] Optionally, the first switching module 801 is configured to execute at least one of the communication steps (e.g., step 200, step 211, step 212, step 221, step 621, step 222, step 622, step 223, step 401, but not limited thereto) performed by the access point device 102 in any of the above methods, which are not described in detail here.

[0282] FIG9 is a schematic diagram of the structure of a site device according to an embodiment of the present disclosure. As shown in FIG9 , the site device 900 may include: a second switching module 901 .

[0283] In some embodiments, the above-mentioned second switching module 901 is used for the site device STA to perceive that the main channel for communication between the site device STA and the access point device AP is in an OBSS busy state, and switch to the auxiliary channel to communicate with the AP, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

[0284] Optionally, the above-mentioned second switching module 901 is used to execute at least one of the communication steps performed by the site device 101 in any of the above methods (for example, step 300, step 311, step 312, step 321, step 721, step 322, step 722, step 323, step 501, but not limited to these), which will not be repeated here.

[0285] Figure 10 is a schematic diagram of the structure of a terminal 1000 (e.g., user equipment) proposed in an embodiment of the present disclosure. Terminal 1000 can be a chip, chip system, or processor that supports a network device implementing any of the above methods, or a chip, chip system, or processor that supports a terminal implementing any of the above methods. Terminal 1000 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0286] As shown in Figure 10, terminal 1000 includes one or more processors 1001. Processor 1001 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Terminal 1000 is used to perform any of the above methods.

[0287] In some embodiments, the terminal 1000 further includes one or more memories 1002 for storing instructions. Optionally, all or part of the memory 1002 may be located outside the terminal 1000.

[0288] In some embodiments, the terminal 1000 further includes one or more transceivers 1004. When the terminal 1000 includes one or more transceivers 1004, the transceiver 1004 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step 201, step 202, step 203, step 204, step 301, step 302, step 303, step 304, but not limited thereto), and the processor 1001 performs at least one of the other steps (for example, step 200, step 211, step 212, step 221, step 621, step 222, step 622, step 223, step 401, step 300, step 311, step 312, step 321, step 721, step 322, step 722, step 323, step 501, but not limited thereto).

[0289] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0290] In some embodiments, terminal 1000 may include one or more interface circuits 1003. Optionally, interface circuit 1003 is connected to memory 1002. Interface circuit 1003 may be configured to receive signals from memory 1002 or other devices, and may be configured to send signals to memory 1002 or other devices. For example, interface circuit 1003 may read instructions stored in memory 1002 and send the instructions to processor 1001.

[0291] The terminal 1000 described in the above embodiment may be a communication device such as a user device, but the scope of the terminal 1000 described in the present disclosure is not limited thereto, and the structure of the terminal 1000 may not be limited by FIG10. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0292] FIG11 is a schematic diagram of the structure of a chip 1100 according to an embodiment of the present disclosure. If the terminal 1000 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 1100 shown in FIG11 , but the present disclosure is not limited thereto.

[0293] The chip 1100 includes one or more processors 1101 , and the chip 1100 is configured to execute any of the above methods.

[0294] In some embodiments, chip 1100 further includes one or more 1103. Optionally, interface circuit 1103 is connected to memory 1102. Interface circuit 1103 can be used to receive signals from memory 1102 or other devices, and interface circuit 1103 can be used to send signals to memory 1102 or other devices. For example, interface circuit 1103 can read instructions stored in memory 1102 and send the instructions to processor 1101.

[0295] In some embodiments, the interface circuit 1103 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step 201, step 202, step 203, step 204, step 301, step 302, step 303, step 304, but not limited to these), and the processor 1101 executes at least one of the other steps (for example, step 200, step 211, step 212, step 221, step 621, step 222, step 622, step 223, step 401, step 300, step 311, step 312, step 321, step 721, step 322, step 722, step 323, step 501, but not limited to these).

[0296] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0297] In some embodiments, the chip 1100 further includes one or more memories 1102 for storing instructions. Alternatively, all or part of the memory 1102 may be external to the chip 1100.

[0298] The present disclosure also provides a storage medium having instructions stored thereon. When the instructions are executed on the terminal 1000, the terminal 1000 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0299] The present disclosure also provides a program product, which, when executed by the terminal 1000, enables the terminal 1000 to perform any of the above methods. Optionally, the program product is a computer program product.

[0300] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A channel switching method, characterized in that: The method comprises: The access point device AP senses that the main channel for communication with the station device STA is in an overlapping basic service set OBSS busy state, and switches to the auxiliary channel to communicate with the STA, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the network allocation vector NAV of the main channel.

2. The channel switching method according to claim 1, characterized in that: The switching to the auxiliary channel to communicate with the STA includes: sensing that the auxiliary channel is in an idle state, and communicating with the STA on the auxiliary channel; or, It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

3. The channel switching method according to claim 2, characterized in that: The communicating with the STA on the auxiliary channel includes: A first request to send RTS frame is sent to the STA, and the duration of the first RTS frame is set as the communication duration of the auxiliary channel.

4. The channel switching method according to claim 2, characterized in that: The performing of the random backoff operation comprises: The random backoff window duration is greater than the NAV duration set for the primary channel, or the random backoff window duration plus the duration required for data transmission is greater than the NAV duration set in the primary channel, giving up the communication on the secondary channel and / or switching to the primary channel for sensing; or, The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

5. The channel switching method according to any one of claims 1 to 4, characterized in that: The switching to the auxiliary channel to communicate with the STA includes: During the communication between the auxiliary channel and the STA, the NAV duration set on the main channel increases, and after the current communication with the STA is completed, the auxiliary channel continues to communicate with the STA.

6. The channel switching method according to claim 1, characterized in that: The method further comprises: During the initial association process, a first wireless frame is sent to the STA; wherein the first wireless frame includes first identification information, and the first identification information identifies the capability information of the AP to communicate on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

7. The channel switching method according to claim 6, characterized in that: The method further comprises at least one of the following: In an initial association process, negotiating parameter information of the auxiliary channel with the STA through the first radio frame; After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the STA through a newly defined radio frame.

8. The channel switching method according to claim 7, characterized in that: The parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established in the initial association process.

9. The channel switching method according to claim 1, characterized in that: The method further comprises: During the initial association process, a second wireless frame sent by the STA is received; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in an OBSS busy state.

10. A channel switching method, characterized in that: The method comprises: The station device STA senses that the main channel for communicating with the access point device AP is in an overlapping basic service set OBSS busy state, and switches to the auxiliary channel to communicate with the AP. The communication duration of the auxiliary channel is set to be less than or equal to the time length set by the network allocation vector NAV of the main channel.

11. The channel switching method according to claim 10, characterized in that: The switching to the auxiliary channel to communicate with the AP includes: sensing that the auxiliary channel is in an idle state, and communicating with the AP on the auxiliary channel; or, It is sensed that the auxiliary channel is in a busy state, and a random backoff operation is performed.

12. The channel switching method according to claim 11, characterized in that: The communicating with the AP on the auxiliary channel includes: Send a second request to send RTS frame to the AP, and set the duration of the second RTS frame to the communication duration of the auxiliary channel. Duration.

13. The channel switching method according to claim 11, characterized in that: The performing of the random backoff operation comprises: The random backoff window duration is greater than the NAV duration set for the primary channel, or the random backoff window duration plus the duration required for data transmission is greater than the NAV duration set in the primary channel, giving up the communication on the secondary channel and / or switching to the primary channel for sensing; or, The random backoff window duration is less than or equal to the NAV duration set for the primary channel, and the state of the secondary channel continues to be sensed.

14. The channel switching method according to any one of claims 10 to 13, characterized in that: The switching to the auxiliary channel to communicate with the AP includes: During the communication between the auxiliary channel and the AP, the NAV duration set for the main channel increases, and after the current communication with the AP is completed, the auxiliary channel continues to communicate with the AP.

15. The channel switching method according to claim 10, characterized in that: The method further comprises: During the initial association process, a first wireless frame sent by the AP is received; wherein the first wireless frame includes first identification information, and the first identification information identifies capability information of the AP for communicating on the auxiliary channel; the capability information includes: whether the AP supports switching to the auxiliary channel for communication when the main channel is in an OBSS busy state.

16. The channel switching method according to claim 10, characterized in that: The method further comprises: During the initial association process, a second wireless frame is sent to the AP; wherein the second wireless frame includes second identification information, and the second identification information identifies the capability information of the STA to communicate on the auxiliary channel; the capability information includes: whether the STA supports switching to the auxiliary channel for communication when the main channel is in the OBSS busy state.

17. The channel switching method according to claim 16, characterized in that: The method further comprises at least one of the following: In an initial association process, negotiating parameter information of the auxiliary channel with the AP through the second radio frame; After the initial association process is completed, parameter information of the auxiliary channel is negotiated with the AP through a newly defined radio frame.

18. The channel switching method according to claim 17, characterized in that: The parameter information of the auxiliary channel includes bandwidth information, and the bandwidth information is the working bandwidth established in the initial association process.

19. An access point device, characterized in that: The access point device comprises: The first switching module is used for the access point device AP to sense that the main channel for communication with the station device STA is in an OBSS busy state, and switch to the auxiliary channel to communicate with the STA, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

20. A site device, characterized in that: The site equipment includes: The second switching module is used for the site device STA to sense that the main channel for communication with the access point device AP is in the OBSS busy state, and switch to the auxiliary channel to communicate with the AP, and the communication duration of the auxiliary channel is set to be less than or equal to the time length set by the NAV of the main channel.

21. An access point device, characterized in that: include: one or more processors; The access point device is used to execute the channel switching method according to any one of claims 1 to 9.

22. A site device, characterized in that: include: one or more processors; The site device is used to execute the channel switching method according to any one of claims 10 to 18.

23. A communication system, characterized in that: It comprises an access point device and a site device; wherein the access point device is configured to implement the channel switching method according to any one of claims 1 to 9, and the site device is configured to implement the channel switching method according to any one of claims 10 to 18.

24. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is enabled to execute the channel switching method according to any one of claims 1 to 9, or execute the channel switching method according to any one of claims 10 to 18.

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