WO2023179368A1

WO2023179368A1 - Sensing method and device

Info

Publication number: WO2023179368A1
Application number: PCT/CN2023/080400
Authority: WO
Inventors: 狐梦实; 韩霄; 娜仁格日勒; 杜瑞; 杨讯
Original assignee: 华为技术有限公司
Priority date: 2022-03-21
Filing date: 2023-03-09
Publication date: 2023-09-28
Also published as: CN116847394A

Abstract

The present application discloses a sensing method and device. The sensing method comprises: in a BTI phase, a first frame is sent to a station, and correspondingly, the station receives the first frame. The first frame may comprise a first field, and the first field is used for determining an available time slot when the station performs sensing. The available time slot is comprised in at least one of the following phases: the BTI phase or an A-BFT phase; or an A-BFT phase or an ATI phase. Then, the station sends one or more second frames in a first time slot, and the available time slot comprises the first time slot. Therefore, an AP or PCP performs sensing on the basis of the one or more second frames to obtain a sensing result. The technical solution provided in the present application may enable a station to transmit a second frame in a suitable time slot.

Description

Sensing methods and devices

This application claims priority to the Chinese patent application filed with the China Patent Office on March 21, 2022, with the application number 2022102791543 and the application title "Perception Method and Device", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of communication technology, and in particular, to a sensing method and device.

Background technique

Signals emitted by wireless local area network (WLAN) devices are usually received after being reflected, diffracted or scattered by various obstacles. This phenomenon makes the actual received signal often the result of the superposition of multiple signals. , that is, the channel environment may become complex, but from another perspective, this also brings convenience to the perception of the physical environment through which wireless signals pass. For example, by analyzing the relevant information of wireless signals affected by various obstacles, such as channel state information (CSI), etc., the surrounding environment can be perceived.

As a result, WLAN sensing technology emerged. With the widespread deployment of WLAN devices and the increase in sensing requirements, sensing using widely available WLAN devices is a current research hotspot.

Contents of the invention

This application provides a sensing method and device, which can realize sensing in appropriate time slots.

In the first aspect, embodiments of the present application provide a sensing method, which can be applied to an access point (access point, AP) or a personal basic service set (PBSS) control point (personal basic service set, PBSS). point, PCP) or wireless fidelity (wireless fidelity, Wi-Fi) chip, the Wi-Fi chip can be set in the AP or PCP; the method includes: The station sends a first frame, the first frame includes a first field, the first field is used to determine an available time slot when the station performs sensing, the available time slot is included in at least one of the following stages: BTI phase or association beamforming training (A-BFT) phase; alternatively, the available time slots are included in at least one of the following phases: A-BFT phase or announcement transmission interval (ATI) Stage; receive one or more second frames from the site in a first time slot, the available time slots include the first time slot; perform sensing based on the one or more second frames, and obtain a sensing result .

For example, the first frame may include a beacon frame. In the embodiment of this application, the STA can determine the available time slot based on the first field, thereby learning the first time slot in which it transmits the second frame, ensuring that the STA can perform sensing in the appropriate time slot. In addition, by indicating the available time slots for the STA, the embodiment of the present application can effectively reduce the time slots between the STA and the directional multi-gigabit (DMG) STA or the enhanced directional multi-gigabit (EDMG) STA. conflicts on time slots, thereby reducing information discarding due to time slot conflicts and improving the utilization efficiency of time domain resources.

In the second aspect, embodiments of the present application provide a sensing method, which method is applied to a station (STA) or a Wi-Fi chip, and the Wi-Fi chip can be installed in the STA; the method includes: The first frame is received in the BTI phase of the standard transmission interval. The first frame includes a first field. The first field is used to determine the available time slots when the station performs sensing. The available time slots are included in at least one of the following stages. In: the BTI phase or the association-beamforming training A-BFT phase; transmitting one or more second frames in a first time slot, the available time slots including the first time slot.

In the third aspect, embodiments of the present application provide a sensing method, which can be applied to AP or PCP or Wi-Fi chip, the Wi-Fi chip can be set in the AP or PCP; the method includes: sending a first frame to the station in the ATI phase (or DTI phase), the first frame including a first field, the first field Used to determine the available time slots when the station performs sensing, the available time slots are included in at least one of the following stages: a BTI stage or an A-BFT stage later than the ATI stage (or a later than the DTI stage) BTI phase or A-BFT phase); or, the available time slot is included in at least one of the following phases: an A-BFT phase or an ATI phase later than the ATI phase (or an A-BFT later than the DTI phase) phase or ATI phase); transmitting a beacon frame to a station during a BTI phase that is later than said ATI phase (or said DTI phase); and receiving one or more second frames from said station in a first time slot, The available time slots include the first time slots; sensing is performed based on the one or more second frames to obtain sensing results.

For example, the first frame may include a management frame.

In the fourth aspect, embodiments of the present application provide a sensing method, which method is applied to STA or Wi-Fi chip, and the Wi-Fi chip can be set in the STA; the method includes: in the ATI phase (or DTI phase ) receives a first frame, the first frame includes a first field, the first field is used to determine the available time slot when the station performs sensing, the available time slot is included in at least one of the following stages: later than The BTI phase or the A-BFT phase of the ATI phase (or the BTI phase or the A-BFT phase later than the DTI phase); or, the available time slots are included in at least one of the following phases: later than the A-BFT phase or ATI phase of the ATI phase (or A-BFT phase or ATI phase later than the DTI phase); receiving a beacon frame in a BTI phase later than the ATI phase (or the DTI phase) ; and transmitting one or more second frames in a first time slot, the available time slots including the first time slot.

In the fifth aspect, the method can be applied to AP or PCP or Wi-Fi chip, and the Wi-Fi chip can be set in the AP or PCP; the method includes: receiving a request from the site in the ATI phase (or DTI phase) frame, the request frame is used to request to perform sensing; send a response frame to the station, the response frame includes a first field, the first field is used to determine the available time slot when the station performs sensing, the The available time slots are included in at least one of the following phases: a BTI phase or an A-BFT phase later than the ATI phase (or a BTI phase or an A-BFT phase later than the DTI phase); or, the available time slots Included in at least one of the following stages: the A-BFT stage or the ATI stage later than the ATI stage (or the A-BFT stage or the ATI stage later than the DTI stage); in the A-BFT stage later than the ATI stage (or the transmitting a beacon frame to the station during the BTI phase of the DTI phase); and receiving one or more second frames from the station in a first time slot, the available time slots including the first time slot; based on the One or more second frames are sensed to obtain the sensing results.

For example, the response frame may also be called a management frame.

In the sixth aspect, the method can be applied to AP or PCP or Wi-Fi chip, and the Wi-Fi chip can be set in AP or PCP; the method includes: sending a request frame in the ATI phase (or DTI phase), so The request frame is used to request to perform sensing; receive a response frame, the response frame includes a first field, the first field is used to determine the available time slot when the station performs sensing, the available time slot is included in at least one of the following stages Medium: The BTI phase or the A-BFT phase that is later than the ATI phase (or the BTI phase or the A-BFT phase that is later than the DTI phase); or, the available time slot is included in at least one of the following phases : A-BFT stage or ATI stage later than the ATI stage (or A-BFT stage or ATI stage later than the DTI stage); in a BTI stage later than the ATI stage (or the DTI stage) receiving a beacon frame; and transmitting one or more second frames in a first time slot, the available time slots including the first time slot.

In conjunction with the first to sixth aspects, in a possible implementation manner, sending one or more second frames in the first time slot includes: sending the first frame in the first time slot based on a target probability. One or more second frames, the target probability represents the probability of the station sending the second frame.

In the embodiment of this application, the target probability can be used to adjust the probability that the STA is allowed to send the second frame, so that the number of users accessing a certain time slot at the same time can be effectively adjusted, and the number of users accessing a certain time slot at the same time can be reduced as much as possible. A situation where too many numbers lead to conflicts. Furthermore, it effectively reduces information discarding due to time slot conflicts and improves time domain resources. utilization efficiency.

In combination with the first to sixth aspects, in a possible implementation manner, the first time slot is randomly determined by the station from the available time slots.

In the embodiment of the present application, the first time slot is determined by randomly selecting time slots, which is simple to implement and can effectively save signaling overhead.

In combination with the first to sixth aspects, in a possible implementation, the first field used to determine the available time slots when the station performs sensing includes: the first field is used to indicate sensing A-BFT Length, the perceived A-BFT length is used to determine the number of time slots of the available time slots; or, the first field is used to indicate the perceived A-BFT factor, the perceived A-BFT factor is used to determine the The number of slots available.

In the embodiment of the present application, the number of available time slots is determined by sensing the A-BFT length or the sensing A-BFT factor. Thus, fewer bits are used to indicate a greater number of time slots, thereby saving signaling overhead.

In combination with the first to sixth aspects, in a possible implementation, the first frame (such as a beacon frame) further includes a beacon interval control field, and the beacon interval control field includes an A-BFT length field. and the A-BFT factor field, the A-BFT length field is used to carry the A-BFT length, the A-BFT factor field is used to carry the A-BFT factor; the number of available time slots is the same as the A-BFT The length is related to the A-BFT factor.

In the embodiment of the present application, the combination of the first field with the A-BFT length and the A-BFT factor effectively increases the range of time slots that the STA can randomly select.

Combined with the first to sixth aspects, in a possible implementation manner, the number of time slots S _total of the available time slots satisfies any of the following: S _total =A-BFT Length×Sensing A-BFT Multiplier; S _total = (A-BFT Length × A-BFT Multiplier) × Sensing A-BFT Multiplier; S _total = (A-BFT Length + A-BFT Length × A-BFT Multiplier) × Sensing A-BFT Multiplier; S _total = A -BFT Length×A-BFT Multiplier+Sensing A-BFT Length; S _total =A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length; wherein, the A-BFT Length represents A- BFT length, the Sensing A-BFT Multiplier represents the sensing A-BFT factor, the Sensing A-BFT Length represents the sensing A-BFT length, and the A-BFT Multiplier represents the A-BFT factor.

In combination with the first to sixth aspects, in a possible implementation, the first field used to determine the available time slot when the station performs sensing includes: the first field is used to indicate the available time slot. At least one of the starting slot position, the ending slot position or the number of slots; or, the first field is used to carry a first bitmap, and the bit length of the first bitmap is according to A -The number of time slots in the A-BFT phase determined by the BFT length and the A-BFT factor is determined, and the first bitmap is used to indicate whether the station uses the corresponding time slot for sensing.

In this embodiment of the present application, one bit in the first bitmap may correspond to one or more time slots. That is to say, one bit in the first bitmap can be used to indicate whether the station uses the corresponding one or more time slots for sensing; or, it can also be understood as indicating whether the station is allowed to use the corresponding one or more time slots. time slot to transmit the second frame.

In combination with the first to sixth aspects, in a possible implementation, the bit length of the first bitmap is any of the following: 32 bits, 16 bits, 8 bits or 4 bits.

For example, for DMG STA, when the number of A-BFT stages determined based on the A-BFT length is greater than the number of DMG STA; or, for EDMG STA, when the number of A-BFT stages determined based on the A-BFT length and the A-BFT factor When the determined number of time slots in the A-BFT stage is greater than the number of EDMG STAs, the above method can effectively utilize the unused time slots in the A-BFT stage, thereby effectively improving the situation of wasted time slots.

In combination with the first to sixth aspects, in a possible implementation manner, the first time slot includes one or more time slots.

In a seventh aspect, embodiments of the present application provide a communication device for performing the method in the first aspect, the third aspect, the fifth aspect or any possible implementation manner. The communication device includes a unit for performing the method in the first aspect, the third aspect, the fifth aspect or any possible implementation.

In an eighth aspect, embodiments of the present application provide a communication device for performing the method in the second aspect, the fourth aspect, the sixth aspect or any possible implementation manner. The communication device includes a unit for performing the method in the second aspect, the fourth aspect, the sixth aspect or any possible implementation.

In the seventh aspect or the eighth aspect, the above-mentioned communication device may include a transceiver unit and a processing unit. For specific descriptions of the transceiver unit and the processing unit, reference may also be made to the device embodiments shown below.

In a ninth aspect, an embodiment of the present application provides a communication device. The communication device includes a processor, configured to execute the method shown in the first aspect, the third aspect, the fifth aspect or any possible implementation manner. Alternatively, the processor is configured to execute a program stored in the memory. When the program is executed, the method shown in the first aspect, the third aspect, the fifth aspect or any possible implementation manner is executed.

In a possible implementation, the memory is located outside the communication device.

In a possible implementation, the memory is located within the above communication device.

In the embodiment of the present application, the processor and the memory can also be integrated into one device, that is, the processor and the memory can also be integrated together.

In a possible implementation, the communication device further includes a transceiver, which is used to receive signals or send signals.

In a tenth aspect, an embodiment of the present application provides a communication device. The communication device includes a processor for executing the method shown in the above second aspect, fourth aspect, sixth aspect or any possible implementation manner. Alternatively, the processor is configured to execute a program stored in the memory. When the program is executed, the method shown in the above second aspect, fourth aspect, sixth aspect or any possible implementation manner is executed.

In an eleventh aspect, embodiments of the present application provide a communication device. The communication device includes a logic circuit and an interface. The logic circuit is coupled to the interface; the interface is used to input and/or output code instructions, and the logic circuit is coupled to the interface. Circuitry is configured to execute the code instructions to cause the first aspect, the third aspect, the fifth aspect, or any possible implementation to be performed.

In a twelfth aspect, embodiments of the present application provide a communication device. The communication device includes a logic circuit and an interface. The logic circuit is coupled to the interface; the interface is used to input and/or output code instructions, and the logic Circuitry is configured to execute the code instructions to cause the second aspect, the fourth aspect, the sixth aspect, or any possible implementation to be performed.

In a thirteenth aspect, embodiments of the present application provide a computer-readable storage medium. The computer-readable storage medium is used to store a computer program. When it is run on a computer, the above-mentioned first aspect, third aspect, and fifth aspect are implemented. The method shown in the aspect or any possible implementation is executed.

In a fourteenth aspect, embodiments of the present application provide a computer-readable storage medium. The computer-readable storage medium is used to store a computer program. When it is run on a computer, the above-mentioned second aspect, fourth aspect, and sixth aspect are implemented. The method shown in the aspect or any possible implementation is executed.

In a fifteenth aspect, embodiments of the present application provide a computer program product. The computer program product includes a computer program Program or computer code, when run on a computer, causes the method shown in the above first aspect, third aspect, fifth aspect or any possible implementation manner to be executed.

In a sixteenth aspect, embodiments of the present application provide a computer program product. The computer program product includes a computer program or computer code. When run on a computer, the computer program product enables the above-mentioned second aspect, fourth aspect, sixth aspect or any of the above. Possible implementations are shown in which the method is executed.

In a seventeenth aspect, embodiments of the present application provide a computer program. When the computer program is run on a computer, the method shown in the first aspect, the third aspect, the fifth aspect or any possible implementation manner is executed.

In an eighteenth aspect, embodiments of the present application provide a computer program. When the computer program is run on a computer, the method shown in the second aspect, the fourth aspect, the sixth aspect or any possible implementation of the second aspect is be executed.

In a nineteenth aspect, embodiments of the present application provide a wireless communication system. The wireless communication system includes a first communication device and a second communication device. The first communication device is configured to perform the above-mentioned first aspect or any of the first aspects. The method shown in the possible implementation manner, the second communication device is configured to perform the method shown in the above second aspect or any possible implementation manner of the second aspect.

For the technical effects achieved by the seventh aspect to the nineteenth aspect, reference can be made to the technical effects of the first aspect to the sixth aspect or the beneficial effects in the method embodiments shown below, and will not be repeated here.

Description of the drawings

Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of a beacon interval (BI) provided by an embodiment of the present application;

Figure 3a is a time slot diagram of the BTI phase and the A-BFT phase provided by the embodiment of the present application;

Figure 3b is a schematic diagram of an available time slot provided by the embodiment of the present application;

Figure 3c is a schematic diagram of an available time slot provided by the embodiment of the present application;

Figure 3d is a schematic diagram of an available time slot provided by the embodiment of the present application;

Figure 4 is a schematic flowchart of a sensing method provided by an embodiment of the present application;

Figure 5 is a schematic flowchart of a sensing method provided by an embodiment of the present application;

Figure 6 is a schematic flowchart of a sensing method provided by an embodiment of the present application;

Figure 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described below in conjunction with the accompanying drawings.

The terms "first" and "second" in the description, claims, and drawings of this application are only used to distinguish different objects, but are not used to describe a specific sequence. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or equipment that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optional It also includes other steps or units inherent to these processes, methods, products or equipment.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art can explicitly and implicitly It is understood that the embodiments described herein may be combined with other embodiments.

In this application, "at least one (item)" means one or more, "plurality" means two or more, "at least two (items)" means two or three and three Above, "and/or" is used to describe the relationship between associated objects, indicating that there can be three relationships. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist simultaneously. In this case, A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ".

The technical solutions provided by the embodiments of the present application can be applied to wireless local area network (WLAN) scenarios, for example, can be applied to the Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers, IEEE) 802.11 system standards, such as 802.11a /b/g standard, 802.11bf standard, 802.11ad standard, 802.11ay standard, or the next generation standard. 802.11bf includes two major categories of standards: low frequency (sub7GHz) and high frequency (60GHz). The implementation of sub7GHz mainly relies on standards such as 802.11ac, 802.11ax, 802.11be and the next generation. The implementation of 60GHz mainly relies on standards such as 802.11ad, 802.11ay and the next generation. Among them, 802.11ad can also be called the directional multi-gigabit (DMG) standard, and 802.11ay can also be called the enhanced directional multi-gigabit (EDMG) standard. The technical solutions of the embodiments of this application mainly focus on the implementation of 802.11bf at high frequencies (802.11ad, 802.11ay), but the relevant technical principles can be extended to low frequencies (802.11ac, 802.11ax, 802.11be).

Although the embodiments of the present application are mainly explained by taking the deployment of WLAN networks, especially networks applying the IEEE 802.11 system standard, as an example, those skilled in the art can easily understand that various aspects involved in the embodiments of the present application can be extended to adopt various standards or protocols. Other networks, such as Bluetooth, high performance wireless local area network (HIPERLAN) and wide area network (WAN), personal area network (PAN) or other currently known or networks developed later. Therefore, regardless of the coverage and wireless access protocol used, the various aspects provided by the embodiments of the present application can be applied to any suitable wireless network.

The technical solutions of the embodiments of the present application can also be applied to various communication systems, such as: WLAN communication system, wireless fidelity (Wi-Fi) system, global system for mobile communication (GSM) system, code Code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) ) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, fifth generation (5th generation, 5G) system or new radio (NR), future sixth generation (6th generation, 6G) system, Internet of things (IoT) Or wireless LAN systems such as vehicle to x (V2X), etc. The above-mentioned communication systems applicable to the present application are only examples. The communication systems applicable to the present application are not limited to these and will be explained uniformly here, and will not be described in detail below.

The terminal in the embodiment of this application may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication Device, user agent, or user device. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), or a device with wireless communication capabilities. handheld device, computing device, or connected to a wireless modem Other processing equipment, vehicle-mounted equipment, wearable equipment, terminal equipment in the 5G network, terminal equipment in the future 6G network or terminal equipment in the public land mobile communication network (public land mobile network, PLMN), etc., embodiments of the present application There is no limit to this.

The network device in the embodiment of this application may be a device used to communicate with a terminal. The network device may be a global system of mobile communication (GSM) system or a code division multiple access (code division multiple access, CDMA) system. The base station (base transceiver station, BTS), or the base station (nodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolutionary base station (evolutional nodeB) in the LTE system , eNB or eNodeB), or it can be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, 5G network The network equipment in the network as well as the network equipment in the future 6G network or the network equipment in the PLMN network are not limited by the embodiments of this application.

Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application. In Figure 1, APs (AP1 and AP2 as shown in Figure 1) can be communication servers, routers, switches, or any of the above network devices, stations (stations, STA) (as shown in Figure 1 The shown STA1, STA2 and STA3) may be mobile phones, computers, or any of the above-mentioned terminals, which are not limited in the embodiment of the present application. The STA and AP communicate after establishing an association relationship. For example, AP1 can communicate with STA2 after establishing an association relationship, and AP1 can communicate with STA1 after establishing an association relationship. It should be understood that the communication system in Figure 1 is only an example. The technical solutions of the embodiments of this application are not only suitable for communication between APs and one or more STAs, but also for mutual communication between APs (AP1 and AP2 as shown in Figure 1), and also for mutual communication between STAs. (STA2 and STA3 shown in Figure 1). The technical solutions of the embodiments of this application can also be applied to communications between a personal basic service set (PBSS) control point (PCP) and one or more STAs. That is to say, the AP involved in the following (methods shown in Figures 4 to 6, etc.) can also be replaced by PCP, which will be described in detail below.

Among them, the access point can be an access point for a terminal (such as a mobile phone) to enter a wired (or wireless) network. It is mainly deployed inside homes, buildings and campuses. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also Deployed outdoors. The access point is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet. Specifically, the access point can be a terminal device (such as a mobile phone) or a network device (such as a router) with a Wi-Fi chip. Optionally, the access point may be a WLAN standard device (such as a sensing device, etc.) that supports the 802.11 series standards. For example, the access point can support the 802.11bf standard, the 802.11ad standard, the 802.11ay standard, or one of the future Wi-Fi standards.

The site can be a wireless communication chip, wireless sensor or wireless communication terminal, etc., and can also be called a user. For example, the site can be a mobile phone that supports Wi-Fi communication function, a tablet computer that supports Wi-Fi communication function, a set-top box that supports Wi-Fi communication function, a smart TV that supports Wi-Fi communication function, or a smart TV that supports Wi-Fi communication function. Smart wearable devices, vehicle-mounted communication devices that support Wi-Fi communication functions, computers that support Wi-Fi communication functions, etc. Optionally, the site can be a WLAN standard device that supports the 802.11 series standards. For example, the site can also support the 802.11bf standard, the 802.11ad standard, the 802.11ay standard, or one of the future Wi-Fi standards.

For example, access points and sites can be devices used in the Internet of Vehicles, IoT nodes, sensors, etc. in the Internet of Things (IoT), smart cameras, smart remote controls, smart water meters and electricity meters in smart homes, and sensors in smart cities, etc.

The wireless communication system provided by the embodiment of the present application may be a WLAN or a cellular network. The method may be implemented by a communication device in the wireless communication system or a chip or processor in the communication device. The communication device may be a communication device that supports multiple links. Wireless communication devices that transmit in parallel are, for example, called multi-link devices or multi-band devices. device). Compared with devices that only support single-link transmission, multi-link devices have higher transmission efficiency and higher throughput. A multi-link device includes one or more affiliated STAs (affiliated STAs). An affiliated STA is a logical station and can work on one link. Among them, the affiliated station can be an AP or a non-AP STA. A multi-link device whose site is an AP can be called a multi-link AP or multi-link AP device or AP multi-link device (AP multi-link device). A multi-link device whose site is a non-AP STA It can be called multi-link STA or multi-link STA device or STA multi-link device.

Figure 2 is a schematic structural diagram of a BI provided by an embodiment of the present application. Referring to Figure 2, in 802.11ad/ay, the timeline can be divided into multiple BIs. Each BI includes beacon header indication (BHI) and data transmission interval (data transmission interval, DTI). Among them, BHI includes beacon transmission interval (beacon transmission interval, BTI), association beamforming training (association beamforming training, A-BFT) and announcement transmission interval (announcement transmission interval, ATI). DTI includes several sub-intervals, which are divided into contention based access period (CBAP) (CBAP1 and CBAP2 as shown in Figure 2) and service period (SP) ( SP1 and SP2 shown in Figure 2).

In 802.11ad, for a BI, during the BTI phase, the AP can send multiple beacon frames in all directions (for example, beacon frames can be sent according to sector numbers). The beacon frame may also be called a DMG beacon, or the initiator transmit sector sweep (I-TXSS) frame. The beacon frame may be used for downlink sector scanning. The beacon frame may include an A-BFT length field, and the A-BFT length field may be used to indicate the slot length of the A-BFT phase.

A-BFT can be used for STA association and uplink sector scanning. In the A-BFT stage, the STA that receives the beacon frame can randomly select a time slot to access according to the number of time slots indicated by the A-BFT length field, and then use the directional antenna to send sector sweep (SSW) ( It can also be called the responder transmit sector sweep (R-TXSS) frame. Thus, the AP can use a quasi-omnidirectional antenna to receive beams from all directions and record the best transmit beam sent by the STA. At the same time, Each SSW frame sent by the STA can contain the best sending sector of the initiating AP. Subsequently, entering the sector scanning feedback phase, the AP can use directional beams to send feedback information to the STA (SSW feedback as shown in Figure 2 (SSW feedback)), the feedback information can include the training information of the previous stage (such as responder sector sweep (responder sector sweep, RSS)), such as the best sending sector of the responder in the previous stage, and the response at this time The party is in quasi-omnidirectional receiving mode. Finally, the sector scan acknowledgment (SSW ACK) phase is entered. When doing sector-level sweep (SLS) before DTI, there is no SSW acknowledgment (ACK) phase. To perform SLS in the DTI stage, the SSW ACK stage is required. It can be understood that the SLS shown in the embodiment of this application can be understood as the correlation-beamforming training process performed in the BTI stage and the A-BFT stage shown above. At the same time , the correlation-beamforming training process shown above can also be performed in the DTI stage. That is to say, when the above correlation-beamforming training process is performed in the BTI stage and A-BFT stage, there may be no SSW confirmation stage. ; When the above correlation-beamforming training process is performed in the DTI phase, there may be an SSW confirmation phase.

In addition, in order to meet the access training needs of more users, the EDMG STA type was introduced in 802.11ay. Different from the traditional DMG STA in 802.11ad, EDMG STA can transmit both SSW frames and Transmit short SSW (short SSW) frames. The length of the short SSW frame is shorter than the length of the SSW frame, which enables the EDGM STA to transmit more short SSW frames in one time slot.

In 802.11ad, the A-BFT length field may be included in the beacon interval control (beacon interval control) field of the beacon frame, and the A-BFT length field is used to indicate the A-BFT length. The bit length of the A-BFT length field is 3 bits. These 3 bits indicate the number of time slots in the A-BFT stage. The value range of the number of time slots is 1-8. Example, DMG STA can use uniform distribution to generate random numbers to select time slots, such as 0 to A-BFT Length-1 (can also be expressed as [0, A-BFT Length)), corresponding to 1 to 8 time slots. gap. Of course, multiple DMG STAs may randomly select the same time slot, which may cause conflicts among the multiple DMG STAs. Therefore, increasing the number of time slots can effectively reduce the probability of conflict. It can be understood that the time slot shown in the embodiment of the present application can also be called a sector scanning time slot (SSW slot), and the time corresponding to the time slot can be called aSSSlotTime.

In 802.11ay, EDMG STA can still send DMG beacon frames when sending beacon frames, thus maintaining compatibility with 802.11ad. However, 802.11ay also made some updates in the DMG beacon frame. For example, B44-B45 in the beacon interval control field in the original beacon frame are reserved in 802.11ad, while in 802.11ay , B44-B45 are updated to the A-BFT factor (Multiplier) (also called A-BFT multiple, etc.) field. The A-BFT factor field is used to indicate the A-BFT factor. By updating B44-B45 to the A-BFT factor field, the A-BFT phase can include more time slots for EDMG STA. Therefore, the number of time slots in the A-BFT stage can become: 1 to A-BFT Length*(1+A-BFT Multiplier), where A-BFT Multiplier can include four values: 0, 1, 2, and 3 . Similarly, the random numbers generated by EDMG STA still follow the uniform distribution, and the range of the generated random numbers is [0,A-BFT Length+A-BFT*A-BFT Multiplier) (that is, the range of random numbers is 0 to A-BFT Length +A-BFT*A-BFT Multiplier-1), corresponding to 1 to 32 slots.

For example, A-BFT length=7, A-BFT Multiplier=3, then for DMG STA, the A-BFT phase includes 7 time slots; for EDMG STA, the A-BFT phase can include 28 time slots. gap (7+7*3=28). For example, EDMG STA can use the fallback method and determine the additional time slots added in the BTI phase for transmitting SSW frames based on the end time of the BTI phase and the A-BFT factor indicated by the A-BFT factor field. The beacon frame includes a duration field, which is used to indicate the end time of the BTI phase (the end time shown in Figure 3a). Therefore, the EDMG STA can determine the actual time of the BTI phase and the additional time slot range for transmitting SSW frames based on the duration field, the A-BFT length field and the A-BFT factor field. That is to say, for EDMG STA, the BTI phase covers the transmission of DMG beacon frames and the transmission of the additional SSW time slots added above in the A-BFT phase. Still taking the example A-BFT length=7 and A-BFT Multiplier=3 shown above as an example, for DMG STA, the 7 time slots after the end time indicated by the duration field are the A-BFT phase. Timeslot range; for EDMG STA, backing off 21 timeslots before the end time indicated by the duration field is the additional timeslot range added in the BTI phase for transmitting SSW frames, that is, for EDMG STA, The actual number of slots in the A-BFT phase is 28 (7 slots after the end time indicated by the duration field, and 21 slots before the end time).

Figure 3a is a time slot diagram of the BTI phase and the A-BFT phase provided by the embodiment of the present application. As shown in Figure 3a, for EDMG STA, the number of time slots included in the A-BFT stage includes both the number of time slots determined based on the A-BFT length (rectangle 1 shown in Figure 3a), and the number of time slots based on the BTI stage. The end time and the number of time slots determined by the A-BFT factor (rectangle 2 as shown in Figure 3a). It can be understood that rectangle 1 and rectangle 2 shown in Figure 3a respectively represent different types of time slots. It can be understood that in Figures 3a to 3d, rectangles of the same pattern can be considered to be the same type of rectangles, and the numbers of unnumbered rectangles in Figures 3a to 3d can refer to the numbers of numbered rectangles of the same pattern.

For DMG STA, even if the BTI contains additional time slots, DMG STA will still consider it to belong to the BTI phase. Only on the additional time slot shown in Figure 3a (rectangle 2 shown in Figure 3a), the AP will not send the beacon frame, and DMGSTA will not receive the beacon frame. In fact, since the beacon frame itself is transmitted in different directions, from the perspective of the DMG STA, it is also possible that a certain time slot (the time slot corresponding to rectangle 2 as shown in Figure 3a) cannot receive the beacon frame. of.

It can be understood that the EDMG STA shown in this application can also be called an 11ay device, the DMG STA can also be called an 11ab device, and the STA shown in Figures 4 and 5 can also be called a sensing device or a device supporting 802.11bf, etc. This application Application examples The specific name of each STA is not limited.

It can be understood that a time slot shown in the embodiment of the present application can be equal to air interface propagation time + sector scanning time (a SSDuration) + medium beamforming interfream space (MBIFS) + sector scanning feedback time (a SSFBDuration)+MBIFS. Among them, the air interface propagation time can represent the propagation delay between the initiator and the responder; aSSDuration can be understood as the responder providing the time corresponding to the number of SSW frames indicated in the FSS, and aSSFBDuration can be understood as the initiator providing feedback for executing SSW frame time. Alternatively, a time slot can also be understood as: aSSSlotTime=aAirPropagationTime+aSSDuration+MBIFS+aSSFBDuration+MBIFS. It is understandable that for the specific duration of a time slot, reference may be made to relevant standards or protocols, such as 802.11ad, etc. It can be understood that the specific duration of a time slot shown here is only an example. With the evolution of standards, the specific duration of a time slot may change, and this is not limited in the embodiments of the present application.

When the above-mentioned AP and STA or different STAs transmit signals, the signals will pass through various obstacles during the transmission process. Therefore, the relevant information of the signal can be used to perceive the environment on the transmission path. For example, the STA and the AP can sense in the beacon interval (beacon interval, BI). That is to say, based on the BI shown in Figure 2, not only beamforming but also sensing is possible. At the same time, with the development of WLAN sensing technology, how to perform sensing between AP and STA, such as which time slots to perform sensing, are currently hot research topics.

In view of this, embodiments of the present application provide a sensing method and device that can perform sensing in an appropriate time slot. For ease of description, the method provided by the embodiments of the present application will be described below using AP and STA as examples.

Figure 4 is a schematic flowchart of a sensing method provided by an embodiment of the present application. As shown in Figure 4, the method includes:

401. The AP sends the first frame to the STA in the BTI phase. The first frame includes a first field. The first field is used to determine the available time slots when the STA performs sensing. Correspondingly, the STA receives the first frame.

In this embodiment of the present application, the first frame may include a beacon frame.

In addition to the first field, the beacon frame also includes a duration field, which is used to indicate the end time of the BTI phase, such as the end time shown in Figure 3b and Figure 3c. And the beacon frame also includes a beacon interval control (beacon interval control) field. The beacon interval control field includes an A-BFT length field and an A-BFT factor field. The A-BFT length field can be used to carry A-BFT. The length,A-BFT factor can be used to carry the A-BFT factor. For example, for DMG STA, the A-BFT length can be used to indicate the number of slots in the A-BFT phase. For another example, for EDMG STA, the A-BFT length and A-BFT factor are used to indicate the number of slots in the A-BFT stage. For descriptions of the A-BFT length and A-BFT factor, please refer to the above description of rectangle 1 and rectangle 2 in Figure 3a, and will not be described in detail here. And the beacon frame includes the next DMG ATI element (Next DMG ATI element). The next DMG ATI element includes a start time field and an ATI duration field. The start time field is used for Indicates the start time of the ATI phase, and the ATI duration field is used to indicate the duration of the ATI phase. It can be understood that the ATI phase corresponding to the start time and duration indicated by the next DMG ATI element can be in the same BI as the BTI phase corresponding to the beacon frame, or the start time and duration indicated by the next DMG ATI element The ATI phase corresponding to the time is located in the subsequent BI of the BI where the BTI phase corresponding to the beacon frame is located (for example, the next DMG ATI element in the beacon frame in the current BI indicates the start time of the ATI phase in the next BI. and duration). It is understandable that for detailed introduction to the duration field, beacon interval control field and next DMG ATI element in the beacon frame, please refer to relevant standards or protocols (such as 802.11ay or 802.11ad), etc., and will not be detailed here. .

It can be understood that for the STA provided in the embodiment of the present application, according to the A-BFT length field and the A-BFT factor field, it can be known that the number of time slots in the A-BFT phase includes the additional number of time slots in the BTI phase and based on The number of slots obtained by the A-BFT length field.

Available time slots can be understood as: available sensing time slots, or the range of time slots that the STA can use when performing sensing, or the range of time slots that the STA can use when performing sensing, or the range of time slots that the STA can randomly select when performing sensing. , or the range of random numbers that the STA randomly selects when performing sensing, or the range of time slots that the STA is allowed to use when performing sensing, or the range of time slots that the STA is allowed to use when transmitting the second frame, or the second time slot corresponding to the transmission sensing result. The time slot range of the frame. Regarding whether the time slot actually used by the STA (such as the first time slot shown below) is all the available time slots, refer to the description about the first time slot in step 402 below.

Optionally, the available time slots are included in at least one of the following phases: BTI phase or A-BFT phase. For example, for the sensing device shown in Figure 3b (which can be understood as the STA and AP shown in the embodiment of this application), the rectangle 3 shown in Figure 3b can be understood as the available time slots included in the BTI phase, as shown in Figure 3b The rectangle 2 and rectangle 3 can be understood as the available time slots are included in the BTI stage. The rectangle 1, rectangle 2 and rectangle 3 shown in Figure 3b are included in the BTI stage and the A-BFT stage (that is, part of the available time slots are included in the BTI stage). In the BTI phase, another part of the available time slots is included in the A-BFT phase). For another example, for the sensing device shown in Figure 3c, rectangle 3 shown in Figure 3c can be understood to mean that the available time slots are included in the BTI stage and the A-BFT stage. It can be understood that the available time slots shown in Figure 3c are only examples. For Figure 3c, the available time slots can also be included in the BTI stage, or the available time slots can be included in the A-BFT stage. It can be understood that the rectangle 2 shown in the embodiment of this application is explained using DMG STA as an example, that is, for the DMG STA, the rectangle 2 belongs to the BTI stage. However, for EDMG STA, rectangle 2 belongs to the A-BFT stage. To maintain uniformity, the method provided by the embodiments of the present application will be described below by taking rectangle 2 belonging to the BTI stage as an example.

It should be noted that when the 802.11ay standard expands the time slots in the A-BFT phase, the main consideration is to maintain compatibility with the 802.11ad standard in the forward direction. Therefore, the embodiments of this application are based on the 802.11ad standard or the DMG STA. The time slot division rules at different stages are introduced. However, those skilled in the art can understand that with the evolution of standards and the development of equipment, the functions corresponding to different stages may increase, and at the same time, the division rules of time slots corresponding to different stages will also change accordingly. Technicians can be flexible.

It can be understood that the embodiment of the present application does not limit the number of time slots represented by each rectangle in Figure 3b to Figure 3d. At the same time, the number of rectangles shown in Figures 3b to 3d is only an example and should not be understood as limiting the embodiments of the present application.

Optionally, available time slots are included in at least one of the following phases: A-BFT phase or ATI phase. For example, for the sensing device shown in Figure 3d, rectangle 3 shown in Figure 3d can be understood to mean that the available time slots are included in the ATI stage, and rectangles 1 and 3 shown in Figure 3d can be understood to mean that the available time slots include In the A-BFT phase and the ATI phase (that is, part of the available time slots is included in the A-BFT phase, and another part of the available time slots is included in the ATI phase).

It can be understood that the available time slots may also be included in the BTI phase, the A-BFT phase and the ATI phase. For the sensing device shown in Figure 3d, rectangle 1, rectangle 2 and rectangle 3 can be understood as available time slots included in the BTI phase, A-BFT phase and ATI phase.

402. The STA sends one or more second frames in the first time slot. Correspondingly, the AP receives the one or more second frames in the first time slot.

In this embodiment of the present application, one time slot can transmit one or more second frames. The first time slot may include one or more time slots. When the second frame is sent through multiple time slots, since the number of second frames is larger, the accuracy of AP sensing can be effectively improved.

The second frame may include an SSW frame, a short SSW frame, a perceptual SSW frame, etc. For the description of the SSW frame or the short SSW frame, please refer to the above description of FIG. 3a, which will not be described in detail here. The sensing SSW frame may be an SSW physical layer (PHY) protocol data unit (PHY protocol data unit, PPDU) used for sensing, and the length of the SSW PPDU may be different from the SSW PPDU (such as an SSW frame) in 802.11ad, or , which can be different from the short SSW PPDU (short SSW frame) in 802.11ay. The sensing SSW frame can be more adapted to the sensing needs, and the STA transmits it in each time slot The number of sensed SSW frames may be different from (or the same as) the number of transmitted SSW frames in 802.11ad, or different from (or the same as) the number of transmitted short SSW frames in 802.11ay. For example, the SSW PPDU (which may also be called a sensing SSW frame, etc.) may include signaling related to sensing, or a training (TRN) field for sensing (this field may be used for further sensing by the AP or STA). The number of SSW PPDUs that can be transmitted in a time slot can be indicated by the FSS field. For the understanding of the FSS field, please refer to the interpretation of the FSS field in 802.11ay, which will not be described in detail here.

The first field, the first time slot and the available time slots shown in the embodiment of the present application are described in detail below.

Implementation method 1.

The first field is used to indicate the perceived A-BFT length, which is used to determine the number of available time slots.

The sensing A-BFT length can be understood as the additional time slot range used for sensing added in the BTI stage, or the additional time slot range used for sensing added in the ATI stage. The perceived A-BFT length can be understood as a rectangle 3 as shown in Figure 3b and Figure 3d. The number of available time slots can be determined based on the perceived A-BFT length. The starting time of the available time slot (which may also be called the starting time slot, etc.) can be obtained based on the A-BFT factor and the perceived A-BFT length backoff.

It should be noted that the above description of the length of the sensing A-BFT is to explain more clearly the time slots used for sensing compared to the 802.11ay standard. Sensing the time slot range indicated by the sensing A-BFT length should not be understood to mean that the STA can only perform sensing within the time slot range indicated by the sensing A-BFT length. This perceived A-BFT length can be used to determine available time slots. For example, the time slot range indicated by the perceived A-BFT length may be the same as the time slot range of available time slots shown in the embodiment of this application. For example, the time slot range indicated by the perceived A-BFT length may also be a part of the available time slots.

Method A, S _total =Sensing A-BFT Length (method one as shown in Figure 3b or method four as shown in Figure 3d). Among them, S _total represents the number of available time slots, and Sensing A-BFT Length represents the sensing A-BFT length. The available time slots can be determined based on the perceived A-BFT length, the end time of the BTI phase, the A-BFT factor, and the A-BFT length.

For example, for Figure 3b, the STA can determine the additional time slot of the A-BFT phase in the BTI phase based on the A-BFT factor, the A-BFT length and the end time of the BTI phase, and then based on the additional A-BFT phase The time slot rollback in the BFT stage senses the A-BFT length to obtain the starting time of the available time slot. The starting time of the available time slot can be used to determine the correspondence between the random number and the time slot. It can be understood that the steps for the STA to determine the starting time of the available time slots shown in the embodiments of the present application are only examples, and should not be understood as limiting the embodiments of the present application. For another example, for Figure 3d, the STA can obtain the starting time of the available time slot based on the starting time of the ATI phase indicated in the next DMG ATI element, and obtain the true starting time of the ATI phase based on the perceived A-BFT length. start time. In other words, the way to occupy the ATI stage can be obtained by telling the false start time of the ATI stage (that is, the actual start time of the ATI stage is later), so that the extra interval between the A-BFT stage and the ATI stage can be Used to transmit the second frame.

The first time slot may be randomly determined from available time slots, and the first time slot may include one or more time slots. For example, STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0, SensingA-BFT Length) or [0, SensingA-BFT Length-1] or [1, SensingA-BFT Length]. For example, the bit length of the first field is 5 bits, that is, the time slot range of available time slots is 1-32 (including 1 and 32), and the range of random numbers can be [0, 32). For another example, the bit length of the first field is 4 bits, that is, the time slot range of available time slots is 1-16 (including 1 and 16), and the range of random numbers can be [0,16). This embodiment of the present application does not limit the bit length of the first field. For example, when the STA performs sensing, the available time slots are 2, then the random number 0 means selecting the first time slot among the available time slots, and the random number 1 means selecting the second time slot among the available time slots.

It should be noted that one random number may correspond to one time slot, or one random number may correspond to multiple time slots (such as two time slots or three time slots, etc.), which is not limited in the embodiments of the present application. For example, if the random number selected by STA from the range of random numbers is 2, then when one random number corresponds to one time slot, the random number 2 can correspond to the third time slot among the available time slots; in the case of a random number When corresponding to two time slots, the random number 2 can correspond to two time slots among the available time slots. Such as the third time slot and the fourth time slot; when a random number corresponds to three time slots, it can correspond to the second to fourth time slots in the available time slots, or the third time slot. time slot to the fifth time slot. It can be understood that the correspondence between random numbers and time slots shown here is only an example. When the number of time slots included in the first time slot is greater than 1, the time slots included in the first time slot Whether it is continuous or not is not limited by the embodiments of this application. For the description of the first time slot, the following also applies.

For mode A, the available time slots when the STA performs sensing are set independently through the first field, which minimizes the impact of other parameters on the available time slots when the STA performs sensing, and does not affect the A-BFT of the DMG STA. The number of time slots in the phase and the number of time slots in the A-BFT phase of EDMG STA. Therefore, the conflict phenomenon when selecting time slots between devices is effectively reduced, ensuring the efficiency of sensing devices, and also ensuring the efficiency of communication between 11ay and 11ad devices.

Method B, S _total =A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length (method 2 as shown in Figure 3b), or, S _total =A-BFT Length+Sensing A-BFT Length (as shown in Figure 3b) Way 5 shown in 3D). Among them, S _total represents the number of available time slots, A-BFT Length represents the A-BFT length, A-BFT Multiplier represents the A-BFT factor, and Sensing A-BFT Length represents the sensing A-BFT length. In other words, the number of available time slots, the A-BFT length, and the A-BFT factor are related. For an explanation of the A-BFT length and A-BFT factor, please refer to Figure 3a and will not be described in detail here.

For example, for Figure 3b, the STA can go back a certain time slot length based on the end time of the BTI phase to obtain the starting time of the available time slots. For example, the certain time slot length is equal to the starting time based on the A-BFT length and A-BFT factor. The sum of the determined number of time slots (i.e. A-BFT Length×A-BFT Multiplier) and the perceived A-BFT length. It can be understood that the steps for the STA to determine the starting time of the available time slots shown in the embodiments of the present application are only examples, and should not be understood as limiting the embodiments of the present application. For another example, for Figure 3d, the STA can obtain the starting time of the available time slot based on the A-BFT length, and obtain the real starting time of the ATI phase based on the perceived A-BFT length.

The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. For example, STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0,A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length) or [0,A-BFT Length×A-BFT Multiplier +Sensing A-BFT Length-1] or [1,A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length]. For example, the bit length of the first field is 4 bits, and the value range of Sensing A-BFT Length is 1-16. For example, the first field carries 0101 (that is, the perceived A-BFT length is 6 time slots), A-BFT Length=2, A-BFT Multiplier=3, then the number of available time slots is 12, and the range of random numbers Can be [0,12). This embodiment of the present application does not limit the bit length of the first field.

For mode B, through the combination of the first field with the A-BFT length and A-BFT factor, the range of time slots that the sensing device can randomly select is effectively increased, that is, the sensing device can be used in the expanded time slots (as shown in Figure 3b). The second frame can be transmitted in the rectangle 3 shown in Figure 3d), or the second frame can be transmitted in the extended time slot range of 11ay (rectangle 2 shown in Figure 3b and Figure 3d).

Method C, S _total =A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length (method three as shown in Figure 3b or method six as shown in Figure 3d). For description of method C, please refer to the above description of method A and method B, which will not be described in detail here.

The first time slot can be randomly determined from available time slots. For example, the first time slot includes one or more time slots. For example, the range of random numbers generated by STA can be [0,A-BFT Length+A-BFT Length×A- BFT Multiplier+Sensing A-BFT Length) or [0,A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length-1] or [1,A-BFT Length+A-BFT Length× A-BFT Multiplier+Sensing A-BFT Length].

For mode C, the combination of the first field with the A-BFT length and A-BFT factor effectively increases the time slot range that the sensing device can randomly select, that is, the sensing device can expand the time slot (as shown in Figure 3b and The second frame can be transmitted in rectangle 3) shown in Figure 3d, or the second frame can be transmitted in the extended time slot range of 11ay (rectangle 2 shown in Figure 3b and Figure 3d). The second frame can be transmitted in the time slot range of 11ad (rectangle 1 shown in Figure 3b and Figure 3d).

Implementation method 2.

The first field is used to indicate the perceived A-BFT factor, which is used to determine the number of time slots available. For example, if the bit length of the first field is 2 bits, then the value range of the perceptual A-BFT factor is 0, 1, 2, and 3. It can be understood that the embodiment of the present application does not limit the bit length of the first field. For example, the bit length of the first field may be n, where n is a positive integer. The starting time of the available time slot can be obtained based on the A-BFT factor and the perceived A-BFT factor backoff. It can be understood that when the value of the sensing A-BFT factor is 0, it can mean that the number of available time slots is 0, that is, the STA cannot perform sensing.

Method D, S _total =A-BFT Length×Sensing A-BFT Multiplier. The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0,A-BFT Length×Sensing A-BFT Multiplier) or [0,A-BFT Length×Sensing A-BFT Multiplier-1] or [ 1,A-BFT Length×Sensing A-BFT Multiplier].

For mode D, the number of available time slots is determined based on the perceived A-BFT factor and A-BFT length, which can reduce the bit length of the first field, thereby reducing the signaling overhead of the first frame.

Method E, S _total = (A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier. The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0, (A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier) or [0, (A-BFT Length×A- BFT Multiplier)×Sensing A-BFT Multiplier-1] or [1,(A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier].

For mode E, the number of available time slots is determined based on the perceived A-BFT factor, A-BFT length and A-BFT factor. The first field can be obtained with a smaller bit length than the bit length of the first field. Being able to indicate more time slot ranges further reduces the signaling overhead of the first frame on the basis that the number of available time slots remains unchanged.

Method F, S _total = (A-BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier. The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0,(A-BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier) or [0,(A- BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier-1] or [1,(A-BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier].

Through the method of determining the number of available time slots shown in mode F, the signaling overhead of the first frame is further reduced on the basis that the number of available time slots remains unchanged.

Method G, S _total ={0,A-BFT Length+(A-BFT Length×A-BFT Multiplier)+[A-BFT Length+(A-BFT Length×A-BFT Multiplier)]×Sensing A-BFT Multiplier}. The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. STA can follow a uniform distribution when generating random numbers. For example, the range of random numbers is [0,A-BFT Length+(A-BFT Length×A-BFT Multiplier)+[A-BFT Length+(A-BFT Length×A-BFT Multiplier)]×Sensing A-BFT Multiplier) or [0,A-BFT Length+(A-BFT Length×A-BFT Multiplier)+[A-BFT Length+(A-BFT Length×A-BFT Multiplier)]×Sensing A -BFT Multiplier-1] or [1,A-BFT Length+(A-BFT Length×A-BFT Multiplier)+[A-BFT Length+(A-BFT Length×A-BFT Multiplier)]×Sensing A-BFT Multiplier] .

It is understandable that in the second implementation, various parameters (such as S _total represents the number of available time slots, A-BFT Length represents the A-BFT length, A-BFT Multiplier represents the A-BFT factor, and Sensing A-BFT Length represents sensing The description of A-BFT length) can be referred to above and will not be described in detail here.

For the above-mentioned modes D, E, F and G, the available time slots may correspond to rectangle 3 in Figure 3b and Figure 3d.

It can be understood that for mode B, mode C, mode E, mode F and mode G, a weight can be set for the STA, and the weight is used to increase the probability that the time slot randomly selected by the STA falls within the sensing A-BFT length. In other words, the randomly selected proportion can be adjusted by setting the weight, making it easier for the sensing device to fall within the range of a certain sensing A-BFT length. The weight may be preset by a protocol or standard, or carried by the AP through the first frame. If the weight is carried in the first frame in the form of a field, the embodiment of the present application does not limit the specific setting method of the weight. And there is no limit to the specific value of this weight.

Implementation method three.

The available time slots include the time slot range based on the A-BFT length (such as the time slot range based on the A-BFT length) and the additional time slot range in the BTI for transmitting SSW frames (such as the time slot range based on the A-BFT length and within the time slot range obtained by the A-BFT factor). In the above implementation methods one and two, as shown in Figure 3b, the available time slots may include time slots in the BTI other than the time slots used to transmit SSW frames. However, for implementation method three, as shown in Figure 3c shows that the available time slots can be understood as the time slot range from the A-BFT length (such as A-BFT Length) and the additional time slot range in the BTI for transmitting SSW frames (such as A-BFT Length × A-BFT Multiplier ) determined in.

Mode H, the first field is used to indicate at least one of the starting time slot position, the ending time slot position, or the number of time slots of the available time slots.

For example, the first field may be used to indicate the starting slot position and the ending slot position of the available time slots. For another example, the first field may be used to indicate the starting slot position and the number of slots of available slots. For another example, if the starting slot position can be preset to: in the BTI stage, the slot position obtained based on A-BFT Length×A-BFT Multiplier rollback, then the first field can be used to indicate the ending slot position or time. number of gaps. As another example, if the number of slots is defined by a standard or protocol, the first field may be used to indicate the starting slot position or the ending slot position. The first time slot may be randomly determined from available time slots, for example, the first time slot includes one or more time slots. The range of random numbers may be determined based on the number of slots available. I won’t go into detail here.

For example, when the time slots in the available time slots are continuous, the number of time slots may include the perceptual A-BFT length, that is, using a time slot length to represent the number of time slots of the available time slots. For example, the first field includes the starting slot position and the number of slots. For another example, the first field includes the end slot position and the slot number. For example, when the time slots among the available time slots are discontinuous, the first field may be used to indicate the positions of multiple discontinuous time slots. For example, the first field may be used to indicate a starting slot position of a plurality of time slots and an ending slot position of a plurality of time slots.

It should be noted that the methods A to H shown above can be combined with each other. For example, the first field may be used to indicate the sensing A-BFT length and the starting slot position of the available slots. That is to say, the rough range of available time slots can be known based on the sensing A-BFT length, as shown in Figure 3b Sensing A-BFT Length, A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length or A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length; at the same time, based on the starting slot position, it can be known that the available time slot is located at Sensing A-BFT Length, A-BFT Length×A- A fine range in BFT Multiplier+Sensing A-BFT Length or A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length. For another example, the first field may be used to indicate the sensing A-BFT factor and the starting slot position of the available slots. That is to say, the coarse range of available time slots can be determined based on the A-BFT factor, and the fine range of available time slots can be determined based on the starting time slot position. It can be understood that the combination methods shown above are only examples, and other combination methods are not listed here.

Mode I, the first field is used to carry the first bitmap, and the bit length of the first bitmap is determined by the A-BFT length and the A-BFT factor. A-BFT Length×A-BFT Multiplier) determines that the first bit of the bitmap is used to indicate whether the STA uses the corresponding time slot for sensing.

For example, the bit length of the first bitmap=A-BFT Length+A-BFT Length×A-BFT Multiplier. For example, A-BFT Length+A-BFT Length×A-BFT Multiplier=8, and the first bitmap is 0111 0000, which represents the number of time slots in the A-BFT stage (including the A-BFT length and additional time slots in the BTI stage). The second to fourth time slots in the added time slots for transmitting SSW frames are sensing A-BFT time slots that sensing devices can participate in. For example, taking A-BFT length=7 and A-BFT Multiplier=3, the bit length of the first bitmap can be 28 bits.

For example, since the maximum number of time slots in the A-BFT stage determined according to the A-BFT length and the A-BFT factor is 32, the bit length of the first bitmap may be 32 bits, or 16 bits, Or 8 bits, or 4 bits, etc., I won’t list them one by one here. That is to say, the bit length of the first bitmap may be fixed, and each bit may correspond to one or more time slots. For example, the first bit map is fixed to 32 bits, the first bit map corresponds to 32 time slots, and each bit corresponds to one time slot. Or the first bit bitmap is fixed to 16 bits, and each bit corresponds to 2 time slots. If the number of slots in the A-BFT stage is 20 slots, then when one bit corresponds to one slot, the first 20 bits in the first bitmap can be considered to be valid.

It can be understood that when the length of the first bitmap is fixed, the number of time slots corresponding to each bit can change according to the actual number of time slots in the A-BFT stage. For example, the first bitmap may have 16 bits. If the random number selected by the STA from random numbers 0-31 (corresponding to the number of slots in the A-BFT phase in 802.11ay) is greater than 15, that is, A -The number of time slots included in the BFT stage is greater than 16 (such as any one of 17 to 32 time slots), then each bit in the first bitmap can correspond to 2 time slots; if the STA starts from the random number 0- The random number selected in 31 is less than or equal to 15, that is, the number of time slots included in the A-BFT stage is less than or less than 16 (such as any one of 1 to 16 time slots), then each of the first bit bitmaps Bits can correspond to 1 time slot.

For mode H and mode I, for DMG STA, when the number of A-BFT stages determined according to the A-BFT length is greater than the number of DMG STA; or, for EDMG STA, when the number of A-BFT stages determined according to the A-BFT length is When the number of time slots in the A-BFT stage determined by the A-BFT factor is greater than the number of EDMG STAs, the above method can effectively utilize the unused time slots in the A-BFT stage, thereby effectively improving the waste of time slots. Case.

Implementation method four.

The first field is used to indicate whether the STA is allowed to transmit the second frame, or the first field may be used to indicate whether the STA is allowed to send the second frame within a certain time slot range. The bit length of the first field may be 1 bit. For example, if the value of the first field is 0, it means that the STA (sensing device) is not allowed to transmit the second frame (such as sensing SSW frame); if the value of the first field is 1, it means that the STA is allowed to transmit the second frame within a certain time slot range. frame. For example, when the value of the first field is 1, the number of available time slots = A-BFT Length + A-BFT Length × A-BFT Multiplier. That is, the above certain time slot range is the same as the time slot range for EDMG STA to transmit SSW frames. For another example, when the value of the first field is 1, the number of available time slots = A-BFT Length. That is, the above certain time slot range is the same as the time slot range for DMG STA to transmit SSW frames. The first time slot can be randomly determined from available time slots. For example, the first time slot includes one or more time slots. For example, the range of random numbers generated by STA can be [0,A-BFT Length+A-BFT Length×A- BFT Multiplier) or [0,A-BFT Length+A-BFT Length×A-BFT Multiplier-1] or [1,A-BFT Length+A-BFT Length×A-BFT Multiplier]; for another example, STA generates random The range of numbers can be [0,A-BFT Length) or [0,A-BFT Length-1] or [1,A-BFT Length].

For implementation mode 4, one bit can be used to indicate the time slot range of the sensing device, effectively reducing the signaling overhead of the first frame.

Implementation method five.

The first field is used to indicate the first time slot.

For implementation methods 1 to 4, the first time slot is one or more time slots randomly selected by the STA from available time slots. In implementation mode 5, the first time slot may be indicated by the first field. That is, the AP can clearly indicate to the STA the time slot used to transmit the second frame through the first field in the first frame. Optionally, the first frame may also include a second field, which is used to instruct the STA to randomly select the first time slot from the time slots indicated in the first field, or to indicate that the STA can select the first time slot according to the time slot indicated in the first field. The second frame is transmitted in the indicated time slot. That is, the second field may be used to indicate whether the first time slot is part of the available time slots.

It can be understood that when one time slot is allocated to multiple users, the multiple users can send the second frame at the same time or probabilistically choose whether to send the second frame, which is not limited in this embodiment of the present application.

By indicating the first time slot through the first field, reasonable allocation of time slots between sensing devices, EDMG STA and DMG STA can be ensured.

It should be noted that in each of the implementations shown above, the available time slot indicated by the first frame may be valid in only one BI (such as the BI where the first frame is sent). Alternatively, the available time slot indicated by the first frame may be valid for multiple BIs, such as the BI where the first frame is sent is valid, and subsequent multiple BIs are valid. Optionally, the available time slots corresponding to the multiple BIs are the same. For example, the first frame may also include the number of BIs corresponding to the first field (for example, M), thereby indicating to the STA that the available time slots corresponding to the M BIs are the same. . Optionally, the first frame may carry the available time slots corresponding to each of the multiple BIs. In this case, there is no limit on whether the available time slots corresponding to each of the multiple BIs are the same. For example, the first field can be used to determine the available time slot corresponding to each BI in multiple BIs; or, the first frame includes multiple first fields, and each first field corresponds to a BI. This embodiment of the present application There is no limit to this. It is understandable that when the first frame carries available time slots corresponding to each BI in multiple BIs, there may be cases where the STA cannot perform sensing in some BIs.

In a possible implementation, the first frame may also include identification information of the station. For example, the identification information of the station may be included in the first field, so that the available time slots when the corresponding station performs sensing are indicated through the first field. For example, the identification information of the station may be included in the third field in the first frame, and the third field may be used to indicate the station that is allowed to transmit the second frame within the available time slot.

By including the site's identifying information, it is made clear to the site whether it can perform sensing. The identification information of the site may include any one or more of the following: STA's associated identification (AID), unassociated ID (UID), and media access control (medium access control, MAC) address. The MAC address can be an individual MAC address (individual MAC address) or a group MAC address (group MAC address).

Combining the above implementation methods one to four, when the first frame carries the identification information of the corresponding STA, the corresponding STA can randomly select a time slot from available time slots to obtain the first time slot. For example, the first frame includes the identification information of STA1 and the identification information of STA2, then STA1 can randomly determine the first time slot 1 from the available time slots, and STA2 can randomly determine the first time slot 2 from the available time slots. It can be understood that whether the first time slot 1 when STA1 performs sensing is the same as the first time slot 2 when STA2 performs time slot sensing is not limited by the embodiment of the present application.

Combined with the fifth implementation method above, the first time slot is indicated through the first field, so that the station corresponding to the first time slot transmits the second frame in the first time slot. For example, the first frame includes the identification information of STA3 and the identification information of STA4. The first field is used to indicate the first time slot 3 when STA3 performs sensing, and the first time slot 4 when STA4 performs sensing. It can be understood that whether the first time slot 3 when STA3 performs sensing is the same as the first time slot 4 when STA4 performs time slot sensing is not limited by the embodiment of this application.

In a possible implementation, the STA sending one or more second frames to the AP in the first time slot includes: sending one or more second frames in the first time slot based on a target probability, the target probability indicating that the STA The probability of sending the second frame.

For example, STA randomly generates a random number in the range [a, b], AP regulations or standard default or mutual negotiation The interval is [c, d], where [c, d] is included in [a, b], such as a is less than or equal to c, and b is greater than or equal to d. If a=c=0, b is greater than d. If the random number generated by the STA is within the interval [c, d], the STA can use the available time slots for sensing, otherwise the STA is not allowed to sense. In other words, the target probability shown above can represent the probability that the random number in the interval [a, b] is located in the interval [c, d].

For example, the AP can indicate a, b, c, and d through the first frame. As another example, when a and c default to 0 (or default to other values), the AP can indicate b and d through the first frame. For another example, each time the AP sends the first frame, b and d can be dynamically updated according to the number of STAs. When there are a large number of STAs, in order to improve the conflict phenomenon, the range of the interval [c, d] in the interval [a, b] can be narrowed, that is, the probability of the STA sending the second frame is reduced.

It can be understood that the target probability shown in the embodiment of the present application can be combined with the first to fifth implementation methods shown above. For example, after the STA determines the first time slot, it may determine whether it can send one or more second frames in the first time slot based on the target probability. Alternatively, the first time slot is determined after the STA determines that it can send one or more second frames based on the target probability.

It can be understood that the target probability shown in the embodiment of the present application can be combined with the identification information of the site, or implemented independently, which is not limited in the embodiment of the present application.

403. The AP performs sensing based on one or more second frames and obtains the sensing result.

For example, the AP may obtain CSI based on one or more second frames. Optionally, the AP and STA can also exchange other frames to obtain one or more of the following information to facilitate perception: azimuth, elevation or location information.

In the embodiment of this application, the STA can determine the available time slot based on the first field, thereby learning the first time slot in which it transmits the second frame, ensuring that the STA can perform sensing in the appropriate time slot. In addition, the embodiment of the present application can effectively reduce the time slot conflicts between the STA and DMGSTA or EDMGSTA by indicating the available time slots to the STA, thereby reducing the situation of information discarding due to time slot conflicts and improving the utilization of time domain resources. usage efficiency.

Figure 5 is a schematic flowchart of a sensing method provided by an embodiment of the present application. As shown in Figure 5, the method includes:

501. The STA sends a request frame to the AP in the ATI phase or DTI phase. The request frame is used to request to perform sensing. Correspondingly, the AP receives the request frame in the ATI phase or DTI phase.

502. The AP sends a response frame to the STA. The response frame is used to respond to the request frame. Correspondingly, the STA receives the response frame.

For example, the response frame may be an ACK message frame.

503. The AP sends a beacon frame to the STA in the BTI phase. Correspondingly, the STA receives the beacon frame.

Optionally, as shown in Figure 5, the response frame may include a first field, which is used to determine available time slots when the station performs sensing. Optionally, the beacon frame may include a first field. That is to say, the first field may be included in the above-mentioned response frame or in the beacon frame, which is not limited in the embodiment of this application. It can be understood that the above-mentioned BTI stage may be included in the subsequent BI where the above-mentioned ATI stage (the ATI stage shown in step 501) is located. Alternatively, the BTI stage is included in the subsequent BI of the BI in which the above-mentioned DTI stage (the DTI stage shown in step 501) is located. For example, the BTI is located in the first BI after the BI where the above-mentioned ATI stage is located, or the first BI after the BI where the DTI stage is located. Alternatively, the above-mentioned BTI stage can be understood as a BTI stage that is later than the above-mentioned ATI stage (the ATI stage shown in step 501) or later than the above-mentioned DTI stage (the DTI stage shown in the step 501).

In the embodiment of the present application, the available time slots may be included in the BTI phase or the A-BFT phase that is later than the ATI phase or the DTI phase; or, the A-BFT phase is later than the ATI phase or the DTI phase. or ATI stage. For descriptions of the first field, etc., please refer to Figure 4 and will not be described in detail here.

It can be understood that for the description of the beacon frame, reference can be made to the above description, which will not be described in detail here.

504. The STA sends one or more second frames in the first time slot. Correspondingly, the AP receives the one or more second frame.

For description of step 504, reference may be made to the description of step 402 in Figure 4, which will not be described in detail here.

505. The AP performs sensing based on the second frame and obtains the sensing result.

For the description of step 504, please refer to the description of step 403 in Figure 4, which will not be described in detail here.

506. The AP sends the sensing result to the STA, and accordingly, the STA receives the sensing result.

Figure 6 is a schematic flowchart of a sensing method provided by an embodiment of the present application. As shown in Figure 6, the method includes:

601. The AP sends the first frame in the ATI phase or DTI phase. The first frame includes a first field. The first field is used to determine the available time slot when the STA performs sensing. Correspondingly, the STA receives the first frame.

For example, the first frame may include a management frame.

602. The AP sends a beacon frame to the STA in the BTI phase. Correspondingly, the STA receives the beacon frame.

It can be understood that the above-mentioned BTI stage may be included in the subsequent BI where the above-mentioned ATI stage (the ATI stage shown in step 601) is located. Alternatively, the BTI stage is included in the subsequent BI of the BI in which the above-mentioned DTI stage (the DTI stage shown in step 601) is located. For example, the BTI is located in the first BI after the BI where the above-mentioned ATI stage is located, or the first BI after the BI where the DTI stage is located. Alternatively, the above-mentioned BTI stage can be understood as a BTI stage that is later than the above-mentioned ATI stage (the ATI stage shown in step 601) or later than the above-mentioned DTI stage (the DTI stage shown in the step 601).

In the embodiment of the present application, the available time slots may be included in the BTI phase or the A-BFT phase that is later than the ATI phase or the DTI phase; or, the A-BFT phase is later than the ATI phase or the DTI phase. or ATI stage. For the description of the first field, please refer to Figure 4 and will not be described in detail here.

603. The STA sends one or more second frames in the first time slot. Correspondingly, the AP receives the one or more second frames in the first time slot.

For description of step 603, reference may be made to the description of step 402 in Figure 4, which will not be described in detail here.

604. The AP performs sensing based on one or more second frames and obtains a sensing result.

For description of step 604, reference may be made to the description of step 403 in Figure 4, which will not be described in detail here.

It should be noted that for Figures 4 to 6, when a certain STA has both association-beamforming training and sensing requirements, the STA can send the second frame within any of the following time slots: Sensing A- BFT time slot, time slot range determined based on A-BFT length, time slot range determined based on A-BFT length and A-BFT factor. That is to say, when a certain STA has both association-beamforming training and sensing requirements, it can achieve both by sending an SSW frame (for example, it can be any one of sensing SSW frame, SSW frame or short SSW frame) Correlation-beamforming training and perception. At the same time, in this case, the time slot used by a certain STA to send SSW frames may be included in the A-BFT phase of the DMG STA, or the A-BFT phase of the EDMG STA, or in the sensing A-BFT time slot.

It should be noted that since the transmission of SSW frames (which can be any of sensing SSW frames, SSW frames (such as SSW frames in 11ad) or short SSW frames) is directional, the AP may not be able to decode the SSW frame. In order for the AP to clearly know the time slot used by the STA to send the SSW frame, the STA can send the SSW frame before or After the SSW frame, the AP is notified through relevant signaling of the time slot used by the STA to send the SSW frame. The relevant information is used to obtain the time slot used by the STA to send the SSW frame. Even if the AP does not decode the SSW frame, the AP can still obtain the relevant sensing information of the STA in the corresponding time slot (that is, the time slot indicated by relevant signaling). . Optionally, the STA can also instruct the AP through relevant signaling, the direction in which the STA sends SSW frames, etc., which will not be listed here.

The following will introduce the communication device provided by the embodiment of the present application.

This application divides the communication device into functional modules according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in this application is schematic and is only a logical function division. In actual implementation, there may be other division methods. The communication device according to the embodiment of the present application will be described in detail below with reference to FIGS. 7 to 9 .

Figure 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in Figure 7, the communication device includes a processing unit 701 and a transceiver unit 702.

In some embodiments of the present application, the communication device may be the AP or PCP or chip shown above, and the chip may be applied to the AP or PCP, etc. For example, the communication device can be used to perform the steps or functions performed by the AP or PCP in the above method embodiments.

The transceiver unit 702 is configured to output the first frame in the BTI stage, where the first frame includes a first field, and the first field is used to determine the available time slot when the station performs sensing;

The transceiver unit 702 is also configured to input one or more second frames in the first time slot, and the available time slots include the first time slot;

The processing unit 701 is configured to perform sensing based on one or more second frames and obtain a sensing result.

Exemplarily, the processing unit 701 is also used to generate the first frame. For example, the transceiver unit 702 used to output the first frame in the BTI phase may include: the transceiver unit 702 configured to send the first frame to the station in the BTI phase. Exemplarily, the transceiver unit 702 is configured to input one or more second frames in the first time slot. The transceiver unit 702 is configured to receive one or more second frames from the station in the first time slot.

It can be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are only examples. For the specific functions or steps performed by the transceiver unit and the processing unit, reference can be made to the above method embodiments (see Figure 3a to Figure 3d, and Figure 4), which will not be described in detail here.

Reusing Figure 7, in other embodiments of the present application, the communication device may be the STA or chip shown above, and the chip may be applied to STA, etc. For example, the communication device can be used to perform the steps or functions performed by the STA in the above method embodiment, etc.

The transceiver unit 702 is configured to input the first frame in the BTI stage. The first frame includes a first field, and the first field is used to determine the available time slot when the station performs sensing;

The transceiver unit 702 is also configured to output one or more second frames in the first time slot, and the available time slots include the first time slot.

Exemplarily, the processing unit 701 is used to process the first frame and obtain available time slots for transmitting the second frame. The processing unit 701 is also used to generate the second frame, etc., which will not be listed here.

Reusing Figure 7, in some embodiments of the present application, the communication device may be the AP or PCP or chip shown above, and the chip may be applied to AP or PCP, etc. For example, the communication device can be used to perform the steps or functions performed by the AP or PCP in the above method embodiments.

The transceiver unit 702 is configured to output the first frame in the ATI phase or the DTI phase, where the first frame includes a first field, and the first field is used to determine the available time slot when the station performs sensing;

The transceiver unit 702 is also configured to output a beacon frame in a BTI phase that is later than the ATI phase or the DTI phase; and input one or more second frames in the first time slot, and the available time slots include the first time slot. ;

It can be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are only examples. For the specific functions or steps performed by the transceiver unit and the processing unit, reference can be made to the above method embodiments (see Figure 3a to Figure 3d, and Figure 6), which will not be described in detail here.

Reusing Figure 7, in some embodiments of the present application, the communication device may be the STA or chip shown above, and the chip may be applied to STA, etc. For example, the communication device can be used to perform the steps or functions performed by the STA in the above method embodiment, etc.

The transceiver unit 702 is configured to input the first frame in the ATI phase or the DTI phase. The first frame includes a first field, and the first field is used to determine the available time slot when the station performs sensing;

The transceiver unit 702 is also configured to input a beacon frame in the BTI phase that is later than the ATI phase or the DTI phase; and output one or more second frames in the first time slot, and the available time slots include the first time slot. gap.

Transceiver unit 702, configured to input a request frame in the ATI phase or DTI phase, the request frame is used to request to perform sensing; and output a response frame, the response frame includes a first field, the first field is used to determine that the site performs sensing available time slots;

The processing unit 701 is configured to perform sensing based on the one or more second frames and obtain a sensing result.

It can be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are only examples. For the specific functions or steps performed by the transceiver unit and the processing unit, reference can be made to the above method embodiments (see Figure 3a to Figure 3d, and Figure 5), which will not be described in detail here.

The transceiver unit 702 is configured to output a request frame in the ATI phase or DTI phase, the request frame is used to request to perform sensing; and input a response frame, the response frame includes a first field, the first field is used to determine when the station performs sensing. Available time slots;

In the previous embodiments, the descriptions about the first frame, the first field, the available time slots, the first time slots and the second frame are also Reference may be made to the introduction in the above method embodiments (Fig. 3a to Fig. 3d, and Fig. 4 to Fig. 6), which will not be described in detail here.

The communication device according to the embodiment of the present application has been introduced above. Possible product forms of the communication device are introduced below. It should be understood that any form of product that has the functions of the communication device described in FIG. 7 falls within the protection scope of the embodiments of the present application. It should also be understood that the following description is only an example, and does not limit the product form of the communication device in the embodiment of the present application to this.

In a possible implementation, in the communication device shown in Figure 7, the processing unit 701 may be one or more processors, the transceiving unit 702 may be a transceiver, or the transceiving unit 702 may also be a sending unit and a receiving unit. , the sending unit may be a transmitter, and the receiving unit may be a receiver, and the sending unit and the receiving unit are integrated into one device, such as a transceiver. In the embodiment of the present application, the processor and the transceiver may be coupled, etc., and the embodiment of the present application does not limit the connection method between the processor and the transceiver. During the execution of the above method, the process of sending information (such as sending the first frame, or sending the second frame, etc.) in the above method can be understood as the process of outputting the above information by the processor. When outputting the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. After the above information is output by the processor, it may also need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information (such as receiving the first frame, or receiving the second frame, etc.) in the above method can be understood as the process of the processor receiving the input information. When the processor receives the incoming information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to undergo other processing before being input to the processor.

As shown in FIG. 8 , the communication device 80 includes one or more processors 820 and a transceiver 810 .

In some embodiments of the present application, for example, when the communication device is used to perform the steps or methods or functions performed by the above-mentioned AP or PCP, the transceiver 810 is used to send the first frame to the STA in the BTI stage, and Receive one or more second frames from the station in the first time slot; the processor 820 is configured to perform sensing based on the one or more second frames and obtain a sensing result.

Exemplarily, when the communication device is used to perform the steps or methods or functions performed by the STA, the transceiver 810 is used to receive the first frame in the BTI stage, and to send one or more second frames in the first time slot. .

For example, the processor 820 is configured to process the first frame and obtain available time slots for transmitting the second frame. The processor 820 is also used to generate the second frame, etc., which will not be listed here.

It can be understood that the specific descriptions of the transceiver and processor shown in the embodiments of the present application are only examples. For the specific functions or steps performed by the transceiver and processor, reference can be made to the above method embodiments (see Figure 3a to Figure 3d, and Figure 4), which will not be described in detail here.

In other embodiments of the present application, for example, when the communication device is used to perform the steps or methods or functions performed by the above-mentioned AP or PCP, the transceiver 810 is used to send the first step to the station in the ATI phase or DTI phase. A frame, the first frame includes a first field, the first field is used to determine the available time slot when the station performs sensing; the transceiver 810 is also used to detect the time slot later than the ATI phase or the DTI phase. The BTI phase transmits a beacon frame to the station; and receives one or more second frames from the station in a first time slot, the available time slots include the first time slot; processor 820 for based on the one or more second frames Perceive and obtain the result of perception.

Exemplarily, when the communication device is used to perform the steps or methods or functions performed by the STA, the transceiver 810 is used to receive the first frame in the ATI phase or the DTI phase, the first frame includes a first field, and the first frame A field is used to determine the available time slots when the station performs sensing; the transceiver 810 is also used to receive a beacon frame in a BTI phase later than the ATI phase or the DTI phase; and send a beacon frame in the first time slot. or multiple second frames, the available time slots include the first time slot.

It can be understood that the specific descriptions of the transceiver and processor shown in the embodiments of the present application are only examples. For the specific functions or steps performed by the transceiver and processor, reference can be made to the above method embodiments (see Figure 3a to Figure 3d, and Figure 6), which will not be described in detail here.

In some embodiments of the present application, for example, when the communication device is used to perform the above-mentioned AP or PCP execution When performing the step or method or function, the transceiver 810 is configured to receive a request frame from the site in the ATI phase or the DTI phase, the request frame is used to request to perform sensing; and send a response frame to the site, the response frame includes a first field, The first field is used to determine the available time slot when the station performs sensing; the transceiver 810 is also used to send a beacon frame to the station in the BTI phase later than the ATI phase or the DTI phase; and in the One time slot receives one or more second frames from the station, and the available time slots include the first time slot; the processor 820 is configured to perform sensing based on the one or more second frames and obtain a sensing result.

Exemplarily, when the communication device is used to perform the steps, methods or functions performed by the STA, the transceiver 810 is used to send a request frame in the ATI phase or DTI phase, the request frame is used to request to perform sensing; and receive a response frame, the response frame includes a first field, the first field is used to determine the available time slot when the station performs sensing; the transceiver 810 is also used to receive the signal in the BTI phase later than the ATI phase or the DTI phase. frame; and transmitting one or more second frames in a first time slot, the available time slots including the first time slot.

In the embodiment of the present application, for descriptions of the first frame, the first field, the available time slot, the first time slot, and the second frame, please refer to the above method embodiments (as shown in Figures 3a to 3d, and Figures 4 to 4 The introduction in 6) will not be described in detail here.

In various implementations of the communication device shown in FIG. 8, the transceiver may include a receiver and a transmitter, the receiver is used to perform the function (or operation) of receiving, and the transmitter is used to perform the function (or operation) of transmitting. ). and transceivers for communication over transmission media and other equipment/devices.

Optionally, the communication device 80 may also include one or more memories 830 for storing program instructions and/or data. Memory 830 and processor 820 are coupled. The coupling in the embodiment of this application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. Processor 820 may cooperate with memory 830. Processor 820 may execute program instructions stored in memory 830. Optionally, at least one of the above one or more memories may be included in the processor.

The specific connection medium between the above-mentioned transceiver 810, processor 820 and memory 830 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 830, the processor 820 and the transceiver 810 are connected through a bus 840 in Figure 8. The bus is represented by a thick line in Figure 8. The connection methods between other components are only schematically explained. , is not limited. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 8, but it does not mean that there is only one bus or one type of bus.

In the embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can be implemented Or execute the disclosed methods, steps and logical block diagrams in the embodiments of this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor, etc.

In the embodiment of the present application, the memory may include but is not limited to non-volatile memories such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (Random Access Memory, RAM), Erasable Programmable ROM (EPROM), Read-Only Memory (ROM) or Portable Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), etc. Memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures, and that can be read and/or written by a computer (such as the communication device shown in this application), but is not limited thereto. The memory in the embodiment of the present application can also be a circuit or any other device capable of realizing a storage function, used to store program instructions and/or data.

For example, the processor 820 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs. Memory 830 is mainly used to store software programs and data. The transceiver 810 may include a control circuit and an antenna. The control circuit is mainly used for converting baseband signals and radio frequency signals. and processing of radio frequency signals. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

When the communication device is turned on, the processor 820 can read the software program in the memory 830, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 820 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 820. The processor 820 converts the baseband signal into data and performs processing on the data. deal with.

In another implementation, the radio frequency circuit and antenna can be arranged independently of the processor that performs baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be arranged remotely and independently of the communication device. .

It can be understood that the communication device shown in the embodiment of the present application may also have more components than shown in FIG. 8 , and the embodiment of the present application does not limit this. The methods performed by the processor and transceiver shown above are only examples. For specific steps performed by the processor and transceiver, please refer to the method introduced above.

In another possible implementation, in the communication device shown in FIG. 7 , the processing unit 701 may be one or more logic circuits, and the transceiver unit 702 may be an input-output interface, also known as a communication interface, or an interface circuit. , or interface, etc. Alternatively, the transceiver unit 702 may also be a sending unit and a receiving unit. The sending unit may be an output interface, and the receiving unit may be an input interface. The sending unit and the receiving unit may be integrated into one unit, such as an input-output interface. As shown in FIG. 9 , the communication device shown in FIG. 9 includes a logic circuit 901 and an interface 902 . That is, the above-mentioned processing unit 701 can be implemented by the logic circuit 901, and the transceiver unit 702 can be implemented by the interface 902. Among them, the logic circuit 901 can be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc., and the interface 902 can be a communication interface, an input/output interface, a pin, etc. Illustratively, FIG. 9 takes the above communication device as a chip. The chip includes a logic circuit 901 and an interface 902 .

In the embodiment of the present application, the logic circuit and the interface may also be coupled to each other. The embodiments of this application do not limit the specific connection methods of the logic circuits and interfaces.

In some embodiments of the present application, for example, when the communication device is used to perform the method or function or step performed by the above-mentioned AP or PCP, the interface 902 is used to output the first frame in the BTI phase, and the first frame includes The first field is used to determine the available time slots when the station performs sensing; the interface 902 is also used to input one or more second frames in the first time slots, and the available time slots include the first time slots; logic Circuit 901 is used to perform sensing based on one or more second frames and obtain sensing results.

Exemplarily, when the communication device is used to perform the method or function or step performed by the STA, the interface 902 is used to input the first frame in the BTI stage. The first frame includes a first field, and the first field is used to determine Available time slots when the station performs sensing; the interface 902 is also used to output one or more second frames in the first time slot, and the available time slots include the first time slot. Exemplarily, the logic circuit 901 is used to process the first frame and obtain available time slots for transmitting the second frame. The logic circuit 901 is also used to generate the second frame, etc., which will not be listed here.

In other embodiments of the present application, for example, when the communication device is used to perform the method or function or step performed by the above-mentioned AP or PCP, the interface 902 is used to output the first frame in the ATI phase or DTI phase, the The first frame includes a first field, which is used to determine the available time slot when the station performs sensing; the interface 902 is also used to output a beacon in a BTI phase that is later than the ATI phase or the DTI phase. frame; and input one or more second frames in the first time slot, the available time slots include the first time slot; the logic circuit 901 is used to perform sensing based on the one or more second frames to obtain the sensing result.

Exemplarily, when the communication device is used to perform the method or function or step performed by the above STA, it is used to input the first frame in the ATI phase or the DTI phase. The first frame includes a first field, and the first field is used to determine When the site performs sensing, the Use time slots; the interface 902 is also used to input beacon frames in the BTI phase later than the ATI phase or the DTI phase; and output one or more second frames in the first time slot, the available time slots include the One time slot.

In some further embodiments of the present application, for example, when the communication device is used to perform the method or function or step performed by the above-mentioned AP or PCP, the interface 902 is used to input a request frame in the ATI phase or DTI phase, and the request The frame is used to request to perform sensing; and output a response frame, the response frame includes a first field, the first field is used to determine the available time slot when the station performs sensing; the interface 902 is also used to perform the sensing later than the ATI phase or the BTI phase of the DTI phase outputs a beacon frame; and inputs one or more second frames in a first time slot, the available time slots include the first time slot; logic circuit 901 for based on the one or more Perform sensing on the second frame to obtain the sensing result.

Exemplarily, when the communication device is used to perform the method or function or step performed by the above STA, the interface 902 is used to output a request frame in the ATI phase or DTI phase, the request frame is used to request to perform sensing; and input a response frame, The response frame includes a first field, which is used to determine the available time slot when the station performs sensing; the interface 902 is also used to input a beacon frame in a BTI phase that is later than the ATI phase or the DTI phase; and outputting one or more second frames in the first time slot, the available time slots including the first time slot.

It can be understood that the communication device shown in the embodiments of the present application can be implemented in the form of hardware to implement the methods provided in the embodiments of the present application, or can be implemented in the form of software to implement the methods provided in the embodiments of the present application. This is not limited by the embodiments of the present application.

For the specific implementation of each embodiment shown in Figure 9, reference may also be made to the above-mentioned embodiments, which will not be described in detail here.

The embodiment of the present application also provides a wireless communication system. The wireless communication system includes an AP (or PCP) and an STA. The AP and the STA can be used to perform any of the foregoing embodiments (as shown in Figures 4 to 6). method.

In addition, this application also provides a computer program, which is used to implement the operations and/or processing performed by the AP or PCP in the method provided by this application.

This application also provides a computer program, which is used to implement the operations and/or processing performed by the STA in the method provided by this application.

This application also provides a computer-readable storage medium, which stores computer code. When the computer code is run on a computer, it causes the computer to perform the operations performed by the AP or PCP in the method provided by this application. /or processing.

This application also provides a computer-readable storage medium that stores computer code. When the computer code is run on a computer, it causes the computer to perform the operations performed by the STA in the method provided by this application and/or deal with.

This application also provides a computer program product. The computer program product includes computer code or computer program. When the computer code or computer program is run on a computer, it causes the operations performed by the AP or PCP in the method provided by this application and/or or processing is performed.

This application also provides a computer program product. The computer program product includes a computer code or a computer program. When the computer code or computer program is run on a computer, it causes the operations and/or processing performed by the STA in the method provided by this application. be executed.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling or direct coupling or communication connection between each other shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units. The connection can also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the technical effects of the solutions provided by the embodiments of the present application.

In addition, each functional unit in various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

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

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

Claims

A sensing method, characterized in that the method includes:

The first frame is sent to the station during the beacon transmission interval BTI phase. The first frame includes a first field. The first field is used to determine the available time slots when the station performs sensing. The available time slots are included in At least one of the following stages: the BTI stage or the correlation-beamforming training A-BFT stage;

receiving one or more second frames from the station in a first time slot, the available time slots including the first time slot;

Perception is performed based on the one or more second frames to obtain a sensing result.
A sensing method, characterized in that the method includes:

The first frame is received in the beacon transmission interval BTI phase. The first frame includes a first field. The first field is used to determine the available time slots when the station performs sensing. The available time slots are included in at least one of the following phases. Middle: the BTI stage or the correlation-beamforming training A-BFT stage;

One or more second frames are transmitted in a first time slot, the available time slots including the first time slot.
The method according to claim 2, wherein sending one or more second frames in the first time slot includes:

The one or more second frames are transmitted in the first time slot based on a target probability representing a probability of the station transmitting the second frame.
The method according to any one of claims 1 to 3, characterized in that the first time slot is randomly determined by the station from the available time slots.
The method according to claim 4, wherein the first field used to determine the available time slots when the station performs sensing includes:

The first field is used to indicate the perceived A-BFT length, and the perceived A-BFT length is used to determine the number of time slots of the available time slots; or,

The first field is used to indicate a perceptual A-BFT factor, and the perceptual A-BFT factor is used to determine the number of time slots of the available time slots.
The method according to claim 5, characterized in that the first frame further includes a beacon interval control field, the beacon interval control field includes an A-BFT length field and an A-BFT factor field, and the A- The BFT length field is used to carry the A-BFT length, and the A-BFT factor field is used to carry the A-BFT factor;

The number of available time slots is related to the A-BFT length and the A-BFT factor.
The method according to claim 5 or 6, characterized in that the number of time slots S total of the available time slots satisfies any of the following:
S total =A-BFT Length×Sensing A-BFT Multiplier;
S total =(A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier;
S total =(A-BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier;
S total =A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length;
S total =A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length;

Wherein, the A-BFT Length represents the A-BFT length, the Sensing A-BFT Multiplier represents the sensing A-BFT factor, the Sensing A-BFT Length represents the sensing A-BFT length, and the A- BFT Multiplier represents the A-BFT factor.
The method according to claim 4, wherein the first field used to determine the available time slots when the station performs sensing includes:

The first field is used to indicate at least one of the starting time slot position, the ending time slot position or the number of time slots of the available time slot; or,

The first field is used to carry a first bitmap. The bit length of the first bitmap is determined according to the number of time slots in the A-BFT stage determined by the A-BFT length and the A-BFT factor. The first The bitmap is used to indicate whether the station uses the corresponding time slot for sensing.
The method according to claim 8, wherein the bit length of the first bitmap is any one of the following: 32 bits, 16 bits, 8 bits or 4 bits.
The method according to any one of claims 1 to 4, characterized in that the first frame further includes identification information of the station.
A communication device, characterized in that the device includes:

A transceiver unit, configured to send the first frame in the beacon transmission interval BTI phase, the first frame including a first field, the first field being used to determine an available time slot when the station performs sensing, the available time slot including In at least one of the following stages: the BTI stage or the correlation-beamforming training A-BFT stage;

The transceiver unit is also configured to receive one or more second frames in a first time slot, and the available time slots include the first time slot;

The processing unit performs sensing based on the one or more second frames and obtains a sensing result.
A communication device, characterized in that the device includes:

A transceiver unit configured to receive the first frame in the beacon transmission interval BTI phase, the first frame including a first field, the first field being used to determine an available time slot when the station performs sensing, the available time slot including In at least one of the following stages: the BTI stage or the correlation-beamforming training A-BFT stage;

The transceiver unit is further configured to send one or more second frames in a first time slot, and the available time slots include the first time slot.
The device according to claim 12, wherein the transceiver unit is specifically configured to send the one or more second frames in the first time slot based on a target probability, the target probability indicating the The probability that the station sends the second frame.
The device according to any one of claims 11-13, characterized in that the first time slot is obtained by the station from randomly determined among the available time slots.
The device according to claim 14, wherein the first field used to determine the available time slot when the station performs sensing includes:

The first field is used to indicate the perceived A-BFT length, and the perceived A-BFT length is used to determine the number of time slots of the available time slots; or,

The first field is used to indicate a perceptual A-BFT factor, and the perceptual A-BFT factor is used to determine the number of time slots of the available time slots.
The device according to claim 15, wherein the first frame further includes a beacon interval control field, the beacon interval control field includes an A-BFT length field and an A-BFT factor field, and the A- The BFT length field is used to carry the A-BFT length, and the A-BFT factor field is used to carry the A-BFT factor;

The number of available time slots is related to the A-BFT length and the A-BFT factor.
The device according to claim 15 or 16, characterized in that the number of time slots Total of the available time slots satisfies any of the following:
Stotal＝A-BFT Length×Sensing A-BFT Multiplier;
Stotal=(A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier;
Stotal=(A-BFT Length+A-BFT Length×A-BFT Multiplier)×Sensing A-BFT Multiplier;
Stotal＝A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length;
Stotal＝A-BFT Length+A-BFT Length×A-BFT Multiplier+Sensing A-BFT Length;

Wherein, the A-BFT Length represents the A-BFT length, the Sensing A-BFT Multiplier represents the sensing A-BFT factor, the Sensing A-BFT Length represents the sensing A-BFT length, and the A- BFT Multiplier represents the A-BFT factor.
The device according to claim 14, wherein the first field used to determine the available time slots when the station performs sensing includes:

The first field is used to indicate at least one of the starting time slot position, the ending time slot position or the number of time slots of the available time slot; or,

The first field is used to carry a first bitmap. The bit length of the first bitmap is determined according to the number of time slots in the A-BFT stage determined by the A-BFT length and the A-BFT factor. The first The bitmap is used to indicate whether the station uses the corresponding time slot for sensing.
The device according to claim 18, wherein the bit length of the first bitmap is any one of the following: 32 bits, 16 bits, 8 bits or 4 bits.
The device according to any one of claims 11 to 14, wherein the first frame further includes identification information of the station.
A communication device, characterized by including a processor and a memory;

The memory is used to store instructions;

The processor is configured to execute the instructions so that the method described in any one of claims 1 to 10 is executed.
A communication device, characterized in that it includes a logic circuit and an interface, and the logic circuit and the interface are coupled;

The interface is used to input and/or output code instructions, and the logic circuit is used to execute the code instructions, so that the method described in any one of claims 1 to 10 is executed.
A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program, and when the computer program is executed, the method described in any one of claims 1 to 10 is executed.
A computer program, characterized in that when the computer program is executed, the method according to any one of claims 1 to 10 is executed.
A communication system, characterized in that it includes an access point AP and a site STA, the AP is used to perform the method as claimed in any one of claims 1 and 3-10, and the STA is used to perform the method as claimed in claim 2 -The method described in any one of 10.