CN115834005A

CN115834005A - Communication method and device

Info

Publication number: CN115834005A
Application number: CN202111089213.2A
Authority: CN
Inventors: 杜瑞; 丁文博; 狐梦实; 韩霄; 杨讯; 李杨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2023-03-21
Also published as: WO2023040614A1

Abstract

The application provides a communication method and device. The method comprises the following steps: the method comprises the steps that first indication information is generated by first equipment, the first indication information is used for indicating Channel State Information (CSI) corresponding to a target subcarrier, the target subcarrier comprises a plurality of groups of subcarriers, the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers; the first device transmits first indication information. According to the scheme of the application, the first equipment informs the second equipment how to feed back the CSI in the sensing process, and the CSI feedback mode provided by the application can reduce the false alarm rate, improve the sensing precision and improve the sensing effect.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

In the sensing process, the sensing initiating terminal sends a sensing signal to the sensing receiving terminal, and the sensing receiving terminal measures the sensing signal to obtain Channel State Information (CSI). The sensing receiving end can send the CSI to the sensing initiating end. And the perception initiating end perceives according to the CSI information. However, according to the existing CSI feedback method, the sensing initiating end performs sensing, and the false alarm rate is high, which results in low sensing precision and affects the sensing effect. Therefore, how to improve the sensing accuracy is an urgent problem to be solved.

Disclosure of Invention

The application provides a communication method and device.

In a first aspect, a communication method is provided, and includes:

the first device generates first indication information, wherein the first indication information is used for indicating Channel State Information (CSI) corresponding to a target subcarrier, the target subcarrier comprises a plurality of groups of subcarriers, the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers. The first device transmits first indication information.

According to the scheme of the application, in the sensing process, the first device informs the second device of feeding back the CSI corresponding to the target subcarrier, the target subcarrier comprises a plurality of groups of subcarriers, wherein the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are arranged between two adjacent groups of subcarriers in the plurality of groups of subcarriers. Through the CSI feedback mode provided by the application, the false alarm rate can be reduced, the sensing precision is improved, and the sensing effect is improved.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information includes a first parameter and a second parameter, and the first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to table 1, table 3 to table 6, table 11 and table 12, and table 15 to table 18.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information includes a third parameter, where the third parameter indicates a target subcarrier, specifically see table 2, tables 7 to 10, tables 13 and 14, and tables 19 to 22.

With reference to the first aspect, in some implementations of the first aspect, the sending, by the first device, the first indication information includes:

the first device sends a Null Data Packet Announcement (NDPA) frame, and the first indication information is carried in a station information (STA) Info field of the NDPA frame.

With reference to the first aspect, in some implementations of the first aspect, the association of the STA Info field identifies the AID as a particular value. The bits B16 and B17 in the STA Info field carry the first parameters, and the bits B18 and B19 carry the second parameters.

According to the scheme of the application, by adopting the special AID, only the first indication information needs to be carried to one STA Info field in the NDPA frame, so that the bit overhead is saved.

With reference to the first aspect, in some implementations of the first aspect, the B25 bits and the B26 bits in the STA Info field carry the first parameter, and the B29 bits and the B30 bits carry the second parameter.

According to the scheme of the application, the existing STA Info field can be multiplexed to carry the first indication information.

With reference to the first aspect, in some implementations of the first aspect, the association of the STA Info field identifies the AID as a particular value. The B17 bit, B18 bit, and B19 bit in the STA Info field carry the third parameter.

With reference to the first aspect, in some implementations of the first aspect, the B25 bit, the B26 bit, and the B29 bit in the STA Info field carry a third parameter.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes:

the first device receives a first wireless frame, wherein the first wireless frame comprises CSI corresponding to a target subcarrier.

With reference to the first aspect, in certain implementations of the first aspect, the first radio frame further includes a multiple-input multiple-output control, MIMO, control field, the MIMO control field to indicate the target subcarriers.

According to the scheme of the application, the second device can notify the first device of the CSI feedback mode adopted by the second device. Thus, the first device may determine whether the second device feeds back the CSI in a manner indicated by the first indication information.

With reference to the first aspect, in certain implementations of the first aspect, the B8 bits in the MIMO control field carry the first parameter, and the B48 bits and the B49 bits carry the second parameter.

With reference to the first aspect, in certain implementations of the first aspect, in an EHT scenario, the B11 bits in the MIMO control field carry the first parameter, and the B14 bits and the B15 bits carry the second parameter.

With reference to the first aspect, in certain implementations of the first aspect, in an HT/VHT scenario, B8 bits and B9 bits in the MIMO control field carry the first parameter, and B24 bits and B25 bits carry the second parameter.

With reference to the first aspect, in certain implementations of the first aspect, in an HE scenario, the B8 bit, the B48 bit, and the B49 bit in the MIMO control field carry a third parameter.

With reference to the first aspect, in certain implementations of the first aspect, in an EHT scenario, the B11 bit, the B14 bit, and the B15 bit in the MIMO control field carry a third parameter.

With reference to the first aspect, in certain implementations of the first aspect, in an HT/VHT scenario, the B8 bit, the B9 bit, and the B24 bit in the MIMO control field carry the third parameter.

With reference to the first aspect, in some implementations of the first aspect, the first wireless frame is a high efficiency compressed beamforming (HE) compressed beamforming frame.

With reference to the first aspect, in certain implementations of the first aspect, the first wireless frame is a very high throughput beamformed EHT compressed beamforming frame.

With reference to the first aspect, in certain implementations of the first aspect, the first wireless frame is a high-throughput/very-high-throughput compressed beamformed HT/VHT compressed beamforming frame.

With reference to the first aspect, in certain implementations of the first aspect, the first radio frame further includes a digital feedback control digital fbck control field, the digital fbck control field indicating a target subcarrier.

With reference to the first aspect, in certain implementations of the first aspect, the B16 bits and the B17 bits in the digital fbck control field carry the first parameter, and the B30 bits and the B31 bits carry the second parameter.

With reference to the first aspect, in certain implementations of the first aspect, the B16 bits, the B17 bits, and the B30 bits in the digital fbck control field carry the third parameter.

With reference to the first aspect, in some implementations of the first aspect, the first wireless frame is a MIMO beamforming feedback frame.

With reference to the first aspect, in certain implementations of the first aspect, each group of subcarriers in the plurality of groups of subcarriers includes the same number of subcarriers.

With reference to the first aspect, in certain implementations of the first aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers is the same.

In a second aspect, a communication method is provided, and includes:

the second device receives first indication information, wherein the first indication information is used for indicating Channel State Information (CSI) corresponding to a target subcarrier, and the target subcarrier comprises a plurality of groups of subcarriers, wherein the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers. And the second equipment sends a first wireless frame, wherein the first wireless frame comprises CSI corresponding to the target subcarrier.

According to the scheme of the application, the second device may obtain the first indication information from the first device, and determine that CSI corresponding to a target subcarrier needs to be fed back, where the target subcarrier includes multiple groups of subcarriers, where the multiple groups of subcarriers include a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the multiple groups of subcarriers. Through the CSI feedback mode provided by the application, the false alarm rate can be reduced, the sensing precision is improved, and the sensing effect is improved.

With reference to the second aspect, in certain implementations of the second aspect, the first indication information includes a first parameter and a second parameter, and the first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to table 1, tables 3 to 6, tables 11 and 12, and tables 15 to 18.

With reference to the second aspect, in certain implementations of the second aspect, the first indication information includes a third parameter, and the third parameter indicates the target subcarrier, specifically, see table 2, tables 7 to 10, tables 13 and 14, and tables 19 to 22.

With reference to the second aspect, in some implementations of the second aspect, the receiving, by the second device, the first indication information includes:

the second device receives a null packet announcement (NDPA) frame, and the first indication information is carried in a station information (STA) Info field of the NDPA frame.

With reference to the second aspect, in some implementations of the second aspect, the association identification AID of the STA Info field is a specific value. The bit B16 and bit B17 in the STA Info field carry the first parameter, and the bit B18 and bit B19 carry the second parameter.

With reference to the second aspect, in some implementations of the second aspect, the B25 bits and the B26 bits in the STA Info field carry the first parameter, and the B29 bits and the B30 bits carry the second parameter.

With reference to the second aspect, in some implementations of the second aspect, the association identification AID of the STA Info field is a specific value. The B17 bit, B18 bit, and B19 bit in the STA Info field carry the third parameter.

With reference to the second aspect, in some implementations of the second aspect, the B25 bit, the B26 bit, and the B29 bit in the STA Info field carry a third parameter.

With reference to the second aspect, in certain implementations of the second aspect, the first wireless frame further includes a multiple input multiple output control, MIMO, control field, the MIMO control field indicating the target subcarriers.

According to the scheme of the application, the second device can inform the first device which target subcarriers are. Thus, the first device may determine whether the second device feeds back CSI in a manner specified by the first indication information.

For the MIMO control field to indicate the target subcarrier, refer to the first aspect, which is not described herein again.

With reference to the second aspect, in certain implementations of the second aspect, in an EDMG scenario, the first wireless frame further includes a digital feedback control digital fbck control field, and the digital fbck control field is used to indicate a target subcarrier.

For the digital fbck control field to indicate the target subcarrier, reference may be made to the first aspect, which is not described herein again.

With reference to the second aspect, in some implementations of the second aspect, each of the plurality of groups of subcarriers includes the same number of subcarriers.

With reference to the second aspect, in some implementations of the second aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers is the same.

In a third aspect, a communication method is provided, including:

the second device determines a target subcarrier. The target subcarrier comprises a plurality of groups of subcarriers, the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and the adjacent two groups of subcarriers in the plurality of groups of subcarriers are separated by a certain number of non-target subcarriers. And the second equipment sends a first wireless frame, wherein the first wireless frame comprises CSI corresponding to the target subcarrier.

According to the scheme of the application, in the sensing process, the second device has the capability of independently determining the target subcarriers, the target subcarriers comprise multiple groups of subcarriers, the multiple groups of subcarriers comprise one group of subcarriers consisting of at least 2 adjacent subcarriers, and two adjacent groups of subcarriers in the multiple groups of subcarriers are separated by a certain number of non-target subcarriers. Through the CSI feedback mode provided by the application, the false alarm rate can be reduced, the sensing precision is improved, and the sensing effect is improved.

With reference to the third aspect, in certain implementations of the third aspect, a MIMO control field is further included in the first radio frame, and the MIMO control field is used to indicate a target subcarrier.

With reference to the third aspect, in certain implementations of the third aspect, the MIMO control field includes a first parameter and a second parameter, and the first parameter and the second parameter jointly indicate a target subcarrier, see in particular table 1, table 3 to table 6, table 11, and table 12.

With reference to the third aspect, in certain implementations of the third aspect, the MIMO control field includes a third parameter, the third parameter indicating a target subcarrier, see in particular table 2, table 7 to table 10, table 13 and table 14.

With reference to the third aspect, in certain implementations of the third aspect, the first radio frame further includes a digital feedback control digital fbck control field, and the digital fbck control field is used to indicate a target subcarrier.

With reference to the third aspect, in certain implementations of the third aspect, the digital fbck control field includes a first parameter and a second parameter, and the first parameter and the second parameter jointly indicate the target subcarrier, see tables 15 to 18.

With reference to the third aspect, in certain implementations of the third aspect, the digital fbck control field includes a third parameter, the third parameter indicating a target subcarrier, see tables 19 to 22.

With reference to the third aspect, in certain implementations of the third aspect, each group of subcarriers in the multiple groups of subcarriers includes the same number of subcarriers.

With reference to the third aspect, in some implementations of the third aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers is the same.

In a fourth aspect, a communication apparatus is provided, the communication apparatus comprising:

a processing unit and a transceiver unit connected with the processing unit.

The processing unit is configured to generate first indication information, where the first indication information is used to indicate channel state information CSI corresponding to a target subcarrier, and the target subcarrier includes multiple groups of subcarriers, where the multiple groups of subcarriers include a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the multiple groups of subcarriers.

And the transceiving unit is used for sending the first indication information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit, configured to transmit the first indication information, includes:

and the transceiver unit is used for sending a null data packet announcement NDPA frame, and the first indication information is carried in a station information STA Info field of the NDPA frame.

The manner in which the first indication information is carried in the STA Info field of the NDPA frame may be referred to in the first aspect, and is not described herein again.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to receive a first radio frame, where the first radio frame includes CSI corresponding to the target subcarrier.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first radio frame further includes a multiple-input multiple-output control, MIMO, control field indicating the target subcarriers.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first radio frame further includes a digital feedback control digital fbck control field, the digital fbck control field indicating the target subcarriers.

With reference to the fourth aspect, in some implementations of the fourth aspect, each of the plurality of groups of subcarriers includes the same number of subcarriers.

With reference to the fourth aspect, in some implementations of the fourth aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers is the same.

In a fifth aspect, a communication apparatus is provided, which includes:

a processing unit and a transceiver unit connected with the processing unit.

The receiving and sending unit is configured to receive first indication information, where the first indication information is used to indicate that channel state information CSI corresponding to a target subcarrier is fed back, and the target subcarrier includes multiple groups of subcarriers, where the multiple groups of subcarriers include a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the multiple groups of subcarriers.

And the processing unit is used for determining the target subcarrier according to the first indication information.

And the transceiver unit is further configured to send a first wireless frame, where the first wireless frame includes CSI corresponding to the target subcarrier.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiver unit, configured to receive the first indication information, includes:

and the transceiver unit is used for receiving the null data packet announcement NDPA frame, and the first indication information is carried in a station information STA Info field of the NDPA frame.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first radio frame further includes a MIMO control field, the MIMO control field indicating a target subcarrier.

For the MIMO control field used for indicating the target subcarrier, reference may be made to the first aspect, which is not described herein again.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first radio frame further includes a digital feedback control digital fbck control field, the digital fbck control field indicating the target subcarriers.

With reference to the fifth aspect, in some implementations of the fifth aspect, each group of subcarriers of the plurality of groups of subcarriers includes the same number of subcarriers.

With reference to the fifth aspect, in some implementations of the fifth aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers is the same.

In a sixth aspect, a communication apparatus is provided, which includes:

a processing unit and a transceiver unit connected with the processing unit.

And the processing unit is used for determining the target subcarrier. The target subcarrier comprises a plurality of groups of subcarriers, the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and the adjacent two groups of subcarriers in the plurality of groups of subcarriers are separated by a certain number of non-target subcarriers.

And the transceiver unit is used for transmitting a first wireless frame, and the first wireless frame comprises CSI corresponding to the target subcarrier.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first radio frame further includes a multiple-input multiple-output control, MIMO, control field indicating the target subcarrier.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first radio frame further includes a digital feedback control digital fbck control field, the digital fbck control field indicating the target subcarriers.

With reference to the sixth aspect, in certain implementations of the sixth aspect, each group of subcarriers in the multiple groups of subcarriers includes the same number of subcarriers.

With reference to the sixth aspect, in some implementations of the sixth aspect, the number of subcarriers spaced between two adjacent groups of subcarriers in the multiple groups of subcarriers is the same.

In a seventh aspect, a communications apparatus is provided that includes at least one processor. The memory is used for storing a computer program, and the processor executes the computer program or instructions stored by the memory when the communication device is running, so that the communication device executes the method of the first aspect or its various implementations. Or cause the communication device to perform the method of the second aspect or its various implementations. Alternatively, the communication device is caused to perform the method of the third aspect or its various implementations. The memory may be located in the processor, or may be implemented by a chip that is independent from the processor, and the application is not limited in this respect.

In an eighth aspect, there is provided a computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect or its various implementations. Or cause a computer to perform a method of the second aspect or its various implementations. Or cause a computer to perform a method of the third aspect or its various implementations.

In a ninth aspect, there is provided a chip having processing circuitry disposed thereon, the processing circuitry being configured to perform the method of the first aspect or its various implementations. Alternatively, the processing circuitry is adapted to perform the method of the second aspect or its various implementations. Alternatively, the processing circuitry is adapted to perform a method of the third aspect or its various implementations.

In a tenth aspect, there is provided a computer program product comprising: a computer program (also may be referred to as code, or instructions), which when executed, causes a computer to perform the method of the first aspect or its various implementations. Or cause a computer to perform a method of the second aspect or its various implementations. Or cause a computer to perform a method of the third aspect or its various implementations.

Drawings

Fig. 1 shows a system architecture to which an embodiment of the present application is applicable.

Fig. 2 shows an exemplary schematic interaction diagram of the method proposed by the present application.

Fig. 3 shows a schematic diagram of a frame structure.

Fig. 4 shows a frame structure diagram.

Fig. 5 shows a schematic diagram of a frame structure.

Fig. 6 shows a schematic diagram of a frame structure.

Fig. 7 shows a frame structure diagram.

Fig. 8 shows a frame structure diagram.

Fig. 9 shows a frame structure diagram.

Fig. 10 shows a frame structure diagram.

Fig. 11 shows a frame structure diagram.

Fig. 12 shows a frame structure diagram.

Fig. 13 shows a frame structure diagram.

Fig. 14 shows a frame structure diagram.

Fig. 15 shows an exemplary schematic interaction diagram of the method proposed by the present application.

Fig. 16 shows an exemplary schematic interaction diagram of the method proposed by the present application.

Fig. 17 shows the result of simulation test #1.

Fig. 18 shows the results of simulation experiment #2.

Fig. 19 shows the result of simulation test #3.

Fig. 20 shows the result of simulation test #4.

Fig. 21 shows a schematic block diagram of a communication device provided by the present application.

Fig. 22 shows another schematic block diagram of a communication device provided herein.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment of the application can be applied to a Wireless Local Area Network (WLAN), and the WLAN may include a plurality of Basic Service Sets (BSS). The network nodes of the BSS include an Access Point (AP) and a Station (STA). Each BSS may contain an AP and a plurality of STAs associated with the AP.

The AP may also be referred to as a wireless access point or a hotspot. The AP is an access point for a user terminal to enter a wired network, and is mainly deployed in a home, a building, and a campus. Typical AP coverage radii are tens to hundreds of meters. It should be understood that the AP may also be deployed outdoors. The AP acts as a bridge connecting the network and the wireless network, and mainly functions to connect clients of the respective wireless networks together and then to access the wireless networks to the ethernet. The standard mainly adopted by APs at present is the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series. Specifically, the AP may be a terminal device or a network device with a wireless fidelity (WiFi) chip. Alternatively, the AP may be a device supporting the WLAN system.

The STA described above is referred to as a user terminal in the present application. The STA may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example, a mobile phone supporting a WiFi communication function, a tablet computer supporting a WiFi communication function, a set-top box supporting a WiFi communication function, a smart television supporting a WiFi communication function, a smart wearable device supporting a WiFi communication function, and a computer supporting a WiFi communication function. Alternatively, the STA may be a device supporting the WLAN system.

Fig. 1 is a schematic diagram of a scenario in which an embodiment of the present application may be applied. The first device in fig. 1 may be the AP described above and the second device may be the STA described above. In the scene, normal wireless communication is performed between the first device and the second device, and the first device or the second device can realize sensing, positioning and the like of a passive target by analyzing channel state information between the first device and the second device while receiving a communication signal. The signal transmission method between the first device and the second device includes, but is not limited to, an orthogonal frequency-division multiple access (OFDMA) method, and a mixed transmission method of OFDMA and multi-site channel multiple input multiple output (MU-MIMO).

It should be understood that the first device may also be a STA. The second device may also be an AP. Without limitation.

It should be noted that fig. 1 is only a schematic diagram, and the embodiment of the present application does not limit the number of APs and STAs included in the scenario.

When the first device or the second device performs sensing measurement on the surrounding environment or a passive target, actual channel state information (or real channel state information) is required, because the sensing measurement is to sense information such as the position, the speed, and the like of the target in the environment by using the real channel state information.

Fig. 2 illustrates one approach provided by the present application, and it is to be understood that the method 200 illustrated in fig. 2 is applicable to the scenario illustrated in fig. 1. The method 200 comprises the following steps:

s210, the first device generates first indication information.

The first indication information is used to indicate Channel State Information (CSI) corresponding to a target subcarrier, where the target subcarrier includes multiple groups of subcarriers, where the multiple groups of subcarriers include a group of subcarriers consisting of at least 2 adjacent subcarriers, and the two adjacent groups of subcarriers are separated by a certain number of non-target subcarriers.

It should be understood that the non-target subcarriers in this application may be understood as subcarriers for which CSI corresponding to the subcarriers does not need to be fed back.

Optionally, each group of subcarriers in the plurality of groups of subcarriers includes the same number of subcarriers.

Optionally, two adjacent groups of subcarriers in the plurality of groups of subcarriers are spaced by the same number of non-target subcarriers.

In addition, as a special case, the target subcarrier may include only one group of subcarriers, where the group of subcarriers includes at least 2 adjacent subcarriers.

S220, the first device sends first indication information. Accordingly, the second device receives the first indication information.

As a possible manner, the sending, by the first device, the first indication information includes:

the first device sends a Null Data Packet Announcement (NDPA) frame, and the first indication information may be carried in a station information (STA Info) field of the NDPA frame. Accordingly, the second device receives the NDPA frame.

For example, in a High Efficiency (HE), or very high throughput (EHT), or High Throughput (HT), or Very High Throughput (VHT) scenario, the first indication information may be carried in the NDPA frame or in another radio frame, which is not limited in this application.

For another example, in an enhanced directional multi-gigabit (EDMG) scenario, the first indication information may be carried in a beam adjustment protocol (BRP) frame, or a multiple input multiple output beamforming Setup (MIMO BF Setup) frame, or in other radio frames, and the application does not limit the carrying manner of the first indication information.

S230, the second device sends a first wireless frame, where the first wireless frame includes CSI corresponding to the target subcarrier. Accordingly, the first device receives a first wireless frame.

It should be understood that the second device may determine the target subcarrier according to the first indication information, and send CSI corresponding to the target subcarrier to the first device through the first radio frame. Optionally, the second device may send CSI on the target subcarriers. Optionally, in an HE scenario, the first wireless frame may be a high efficiency compressed beamforming (HE compressed beamforming) frame; in an EHT scenario, the first wireless frame may be an extremely high throughput beamforming (EHT compressed beamforming) frame; in an HT/VHT scenario, the first wireless frame may be a high throughput/very high throughput compressed beamforming (HT/VHT compressed beamforming) frame; in an EDMG scenario, the first wireless frame may be a multiple-input multiple-output beamforming feedback (MIMO beamforming feedback) frame.

It should be understood that the first radio frame may also be other radio frames, which is not limited in this application.

Optionally, the first indication information in S210 is used to indicate CSI corresponding to the target subcarrier, and includes the following two manners.

Mode A:

the first indication information comprises a first parameter and a second parameter, and the first parameter and the second parameter jointly indicate a target subcarrier.

The first parameter may be, for example, 802.11ax or the parameter Ng (number of group subcarriers) specified in 802.11 ay. Taking the current protocol as an example, when Ng is 2, there is one target subcarrier in every two subcarriers, and 1 subcarrier is spaced between every two target subcarriers; when Ng is 4, there is a target subcarrier in every 4 subcarriers, and 3 subcarriers are spaced between every two target subcarriers; when Ng is 8, there is one target subcarrier in every 8 subcarriers, and 7 subcarriers are spaced between every two target subcarriers.

The second parameter may be, for example, a neighbor size indicating the number of subcarriers included in each group of subcarriers in the plurality of groups of subcarriers.

As a first possible scenario, the first parameter and the second parameter jointly indicate the target subcarrier, see table 1 in particular. It is understood that the expression A: B: C appearing in the present application means that starting from A, one value is taken for each B integer, up to C. For example, a value of-122 for 8 is taken at every 8 integers, starting at-122, and going to-10. I.e., -122, 8, -10 and the sequence-122, -114, -106, -98, -90, -82, -74, -66, -58, -50, -42, -34, -26, -18, -10, etc.

The first column of table 1 is the first parameter, which may be Ng, for example; the second column is the second parameter, which may be, for example, a neighbor size; the third to sixth columns are target subcarrier indexes (subcarrier indexes) in the case of 20MHz, 40MHz, 80MHz, 160MHz bandwidths, respectively.

In this case, the first device and/or the second device may store the information included in table 1.

As an example, table 1 may be applied to a High Efficiency (HE) scenario.

The pilot subcarriers (pilot subcarriers) are not skipped by the target subcarriers in table 1.

As a second possible scenario, the first parameter and the second parameter jointly indicate the target subcarrier, specifically see tables 3 to 6.

The first column of tables 3 to 5 is 242-tone RU index, and the first column of Table 6 is 996-tone RU index. The 242-tone RU index is an index of a resource unit after 242 subcarriers are used as one resource unit. Similarly, the 996-tone RU index is an index of a resource unit after 996 subcarriers are regarded as one resource unit.

As a possible way, the first device may transmit information of the 242-tone RU index, or information of the 996-tone RU index to the second device.

The meanings of the 242-tone RU index and the 996-tone RU index are not described in detail below.

The second column in tables 3 to 6 is the first parameter, which may be Ng, for example; the third column in tables 3 to 6 represents the second parameter, which may be, for example, a neighbor size; the fourth to eighth columns of tables 3 to 6 are target subcarrier indexes in the case of bandwidths of 20MHz, 40MHz, 80MHz, 160MHz, 320MHz, respectively.

In this case, the first device and/or the second device may store the information included in tables 3 to 6.

As an example, tables 3 to 6 may be applied to an Extreme High Throughput (EHT) scenario.

The target sub-carriers do not skip the pilot sub-carriers in tables 3 to 6.

As a third possible scenario, the first parameter and the second parameter jointly indicate the target subcarrier, specifically see tables 11 to 12.

The first column of tables 11 and 12 is the bandwidth (channel width); the second column is the first parameter, which may be Ng, for example; the third column indicates the second parameter, which may be, for example, neighbor size; the fourth column is the target subcarrier index.

In one possible approach, the first parameter and the second parameter jointly indicate the target subcarrier, see in particular table 11-2 and table 12-2.

Specifically, compared to table T, the newly added column in table T-2 is the fifth parameter, and the fifth parameter is the number of target subcarriers. For example, the fifth parameter is Ns. Where T may take an integer from 11 to 22.

In this case, the first device and/or the second device may store the information included in tables 11 and 12, or store the information included in tables 11-2 and 12-2.

As an example, the above tables 11 and 12 may be applied to a High Throughput (HT) or Very High Throughput (VHT) scenario.

As a fourth possible scenario, the first parameter and the second parameter jointly indicate the target subcarrier, see in particular tables 15 to 18.

The first column of tables 15 to 18 is the Number of Channel Bonding (NCB); the second column is the first parameter, which may be Ng, for example; the third column indicates the second parameter, which may be, for example, neighbor size; the fourth column is the index of the target subcarrier.

In one possible approach, the first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to table 15-2 to table 18-2.

In this case, the first device and/or the second device may store the information included in tables 15 to 18, or store the information included in tables 15-2 to 18-2.

As an example, the above tables 11 and 12 may be applied to an enhanced directional multi-gigabit (EDMG) scene.

Mode B:

the first indication information includes a third parameter indicating a target subcarrier. For example, the third parameter may be neighbor grouping.

As a first possible scenario, the third parameter indicates the target subcarrier, see table 2 in particular.

The first column of table 2 is the third parameter described above, which may be, for example, neighbor grouping; the second column to the fifth column are target subcarrier indexes in the case of 20MHz, 40MHz, 80MHz, 160MHz bandwidths, respectively.

In this case, the first device and/or the second device may store the information included in table 2.

As an example, table 2 may be applied to HE scenarios.

The pilot subcarriers are not skipped by the target subcarriers in table 2.

As a second possible scenario, the third parameter indicates the target subcarrier, see in particular tables 7 to 10.

The first column of tables 7 to 9 is 242-tone RU index, and the first column of Table 10 is 996-tone RU index; the second column of tables 7 to 10 is the third parameter described above, and may be neighbor grouping, for example; the third to seventh columns of tables 7 to 10 are target subcarrier indexes in the case of bandwidths of 20MHz, 40MHz, 80MHz, 160MHz, 320MHz, respectively.

In this case, the first device and/or the second device may store the information included in tables 7 to 10.

As an example, tables 7 to 10 may be applied to the EHT scenario.

The target sub-carriers do not skip the pilot sub-carriers in tables 7 to 10.

As a third possible scenario, the third parameter indicates the target subcarrier, see in particular table 13 and table 14.

The first column of tables 13 and 14 is bandwidth; the second column is the third parameter, which may be neighbor grouping, for example; the third column is the target subcarrier index.

In one possible approach, the third parameter indicates the target subcarrier, see in particular table 13-2 and table 14-2.

In this case, the first device and/or the second device may store the information included in tables 13 and 14, or store the information included in tables 13-2 and 14-2.

As an example, tables 13 and 14, or tables 13-2 and 14-2 may be applied to HT or VHT scenarios.

As a fourth possible scenario, the third parameter indicates the target subcarrier, see in particular tables 19 to 22.

The first column of tables 19 to 22 is NCB; the second column is the third parameter, for example, it may be neighbor grouping; the third column is the target subcarrier index.

In one possible approach, the third parameter indicates the target subcarrier, see in particular tables 19-2 through 22-2.

In this case, the first device and/or the second device may store the information included in tables 19 to 22, or store the information included in tables 19 to 22.

As an example, tables 19-22, or tables 19-2-22-2 may be applied to an EDMG scenario.

The above possible scenarios are only exemplary and are not limiting, and any variations belonging to the above tables are applicable to the embodiments of the present application.

Optionally, when S210 is performed according to the method a, in S220, the first parameter and the second parameter are carried in the STA Info field of the NDPA frame, which includes the following two methods:

mode 1:

the association identification AID of the STA Info field may be a specific value, for example, 2046, which indicates that the STA Info field carries part of the common information.

For example, as shown in fig. 3, bits B16 and B17 in the STA Info field carry the first parameter, and bits B18 and B19 carry the second parameter. It should be understood that the first parameter and the second parameter may also be carried in other bits in the STA Info field. For example, it may be carried by one or more bits in B20-B26, B28-B31.

As an example, this approach 1 may be applicable to HE or EHT scenarios.

Mode 2:

the STA Info field existing in the multiplexed NDPA frame carries the first parameter and the second parameter.

For example, as shown in fig. 4, bits B25 and B26 in the STA Info field carry the first parameter, and bits B29 and B30 carry the second parameter. It should be understood that the first parameter and the second parameter may also be carried in other bits in the STA Info field. For example, it may be carried by B20 bits in combination with other bits.

As an example, this approach 2 may be applicable to an EHT scenario.

Optionally, when S210 is performed according to the method B, in S220, the third parameter is carried in the STA Info field of the NDPA frame, which includes the following two methods:

mode 1):

For example, as shown in fig. 5, the B17 bit, the B18 bit, and the B19 bit in the STA Info field carry the third parameter. It should be understood that the third parameter may also be carried in other bits in the STA Info field. For example, it may be carried by one or more bits in B20-B26, B28-B31.

As an example, this approach 1) may be applicable to HE or EHT scenarios.

Mode 2):

the STA Info field existing in the multiplexed NDPA frame carries the third parameter.

For example, as shown in fig. 6, the B25 bit, the B26 bit, and the B29 bit in the STA Info field carry the third parameter. It should be understood that the third parameter may also be carried in other bits in the STA Info field. For example, it may be carried by the B31 bit in combination with other bits.

As an example, this manner 2) may be applied to an EHT scenario.

Optionally, as a case, in S230, the first radio frame further includes a MIMO control field, where the MIMO control field is used to indicate the target subcarrier.

Optionally, as another case, in S230, the first wireless frame further includes a digital feedback control (digital fbck control) field. The digital fbck control field is used to indicate a target subcarrier.

The MIMO control field is used to indicate a target subcarrier and includes the following two ways.

Mode a:

the MIMO control field includes a first parameter and a second parameter, which jointly indicate a target subcarrier.

As a first possible scenario, as shown in fig. 7, B8 bits in the MIMO control field carry the first parameter, and B48 bits and B49 bits carry the second parameter. The first parameter and the second parameter jointly indicate a target subcarrier, which is specifically referred to in table 1.

It should be understood that the first and second parameters may also be carried by other bits. E.g. carried by one or more bits in B37-B39, B51-B55.

The B9, B50 bits in the MIMO control field carry a fourth parameter indicating the quantization bits of the real and imaginary parts of each element in the CSI matrix. In one possible case, the fourth parameter may be a coefficient size (coefficient size) parameter.

For example, when the fourth parameter is 0, the quantization bits of the real part and the imaginary part of each element in the CSI matrix are 4 bits; when the fourth parameter is 1, the quantization bits of the real part and the imaginary part of each element in the CSI matrix are 5 bits; when the fourth parameter is 2, the quantization bits of the real part and the imaginary part of each element in the CSI matrix are 6 bits; when the fourth parameter is 3, the quantization bits of the real part and the imaginary part of each element in the CSI matrix are 8 bits.

The value of the fourth parameter is not described in detail below.

As an example, this first possible scenario may apply to HE scenarios.

As a second possible scenario, as shown in fig. 8, the B11 bit in the MIMO control field carries the first parameter, and the B14 bit and the B15 bit carry the second parameter. The first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to tables 3 to 6.

It should be understood that the first and second parameters may also be carried by other bits. For example, carried by one or more bits of B16, B38, B39.

The B36, B37 bits in the MIMO control field carry the fourth parameter.

As an example, this second possible scenario may apply to an EHT scenario.

As a third possible scenario, as shown in fig. 9, B8 bits and B9 bits in the MIMO control field carry the first parameter, and B24 bits and B25 bits carry the second parameter. The first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to table 11 and table 12. Alternatively, the first parameter and the second parameter jointly indicate the target subcarrier, see in particular table 11-2 and table 12-2.

It should be understood that the first and second parameters may also be carried by other bits. E.g. carried by one or more bits of B16, B17, B27-B31.

The B10, B26 bits in the MIMO control field carry the fourth parameter.

As an example, this third possible scenario may be applied to HT/VHT scenarios.

Mode b:

the MIMO control field includes a third parameter indicating a target subcarrier.

As a first possible scenario, as shown in fig. 10, the B8 bit, the B48 bit, and the B49 bit in the MIMO control field carry the third parameter. The third parameter indicates the target subcarrier, see table 2 for details.

It should be understood that the third parameter may also be carried by other bits. E.g. carried by one or more bits in B37-B39, B51-B55.

The B9, B50 bits in the MIMO control field carry the fourth parameter.

As an example, this first possible scenario may apply to HE scenarios.

As a second possible case, as shown in fig. 11, B11 bits, B14 bits, and B15 bits in the MIMO control field carry a third parameter. The third parameter indicates a target subcarrier, see in particular tables 7 to 10.

It should be understood that the third parameter may also be carried by other bits. For example, carried by one or more bits of B16, B38, B39.

The B36, B37 bits in the MIMO control field carry the fourth parameter.

As an example, this second possible scenario may apply to an EHT scenario.

As a third possible scenario, as shown in fig. 12, the B8 bit, the B9 bit, and the B24 bit in the MIMO control field carry a third parameter. The third parameter indicates the target subcarrier, see table 13 and table 14 in particular. Alternatively, the third parameter indicates the target subcarrier, see in particular table 13-2 and table 14-2.

It should be understood that the third parameter may also be carried by other bits. E.g. carried by one or more bits of B16, B17, B26-B31.

The B10, B25 bits in the MIMO control field carry the fourth parameter.

As an example, this third possible scenario may be applied to HT/VHT scenarios.

The digital fbck control field is used to indicate a target subcarrier, and includes the following two ways. As an example, the following two approaches are applicable to an EDMG scenario.

The method I comprises the following steps:

the digital fbck control field includes a first parameter and a second parameter, which jointly indicate a target subcarrier.

For example, as shown in fig. 13, the B16 bits and the B17 bits in the digital fbck control field carry the first parameter, and the B30 bits and the B31 bits carry the second parameter. The first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to tables 15 to 18. Alternatively, the first parameter and the second parameter jointly indicate the target subcarrier, see in particular table 15-2 to table 18-2.

The B18, B32 bits in the digital fbck Control field carry the fourth parameter.

The second method comprises the following steps:

the digital fbck control field includes a third parameter indicating a target subcarrier.

For example, as shown in fig. 14, the B16 bit, the B17 bit, and the B30 bit in the digital fbck control field carry the third parameter. The third parameter indicates the target subcarrier, see table 19 to table 22 in particular. Alternatively, the third parameter indicates the target subcarrier, see in particular table 19-2 to table 22-2.

It should be understood that the third parameter may also be carried by other bits. For example, carried by B32 bits in combination with other bits.

The bits B18, B31 in the digital fbck Control field carry the fourth parameter.

Further, as shown in fig. 15, before S230, the method 200 further includes the following steps S201 and S202:

s201, the first device sends a sensing signal. Accordingly, the second device receives the perception signal.

In one case, in an HE, or EHT, or HT, or VHT scenario, the sensing signal may be a Null Data Packet (NDP) frame.

Alternatively, in an EDMG scenario, the perceptual signal may be a BRP frame.

It should be understood that the sensing signal can be carried in N subcarriers, where N is a positive integer.

And S202, the second equipment carries out channel estimation according to the sensing signal and determines CSI.

In a possible implementation manner, the second device may perform channel estimation on each of the N subcarriers, and determine CSI corresponding to each of the N subcarriers.

Further, as shown in fig. 15, after S230, optionally, the method 200 further includes the following step S203.

S203, the first device senses according to the CSI corresponding to the target subcarrier.

Optionally, the first device may subdivide the multiple groups of subcarriers into multiple sets according to the number of subcarriers included in each group of subcarriers in the multiple groups of subcarriers; the first device inverse fourier transforms subcarriers included in each of the plurality of sets.

For example, in the HE scenario, the bandwidth is 20MHz, and the first parameter is 4, the second parameter is 2, or the third parameter is 3, the index of the target subcarrier is [ -122. Since 2 subcarriers are included in each group of subcarriers, the first device may subdivide the groups of subcarriers into 2 sets.

The set #1 comprises sub-carriers with indices of-122, -114, -106, -98, -90, -82, -74, -66, -58, -50, -42, -34, -26, -18, -10, -2,9,17,25,33,41,49,57,65,73,81,89,97,105,113,121. That is, set #1 includes the first subcarrier from left to right for each of the original sets of subcarriers.

The set #2 includes subcarriers having indices of-121, -113, -105, -97, -89, -81, -73, -65, -57, -49, -41, -33, -25, -17, -9,2,10,18,26,34,42,50,58,66,74,82,90,98,106,114,122. That is, set #2 includes the second subcarrier from left to right for each of the original sets of subcarriers.

It should be appreciated that if 4 subcarriers are included in each of the groups of subcarriers, the first device may subdivide the groups of subcarriers into 4 sets. Set #1 includes the first subcarrier from left to right of each of the original sets of subcarriers. Set #2 includes the second subcarrier from left to right for each of the original sets of subcarriers. Set #3 includes the third subcarrier from left to right for each of the original sets of subcarriers. Set #4 includes the fourth subcarrier from left to right for each of the original sets of subcarriers.

In the following, a description will be given by taking an example in which each of the plurality of groups of subcarriers includes 2 subcarriers.

The first device performs inverse fourier transform, for example, inverse Fast Fourier Transform (IFFT) on the subcarriers included in the set #1, and obtains a power delay spectrum corresponding to the set #1 as:

wherein, F _p (m ₁ ) V (m) is a result of inverse Fourier transform of the subcarriers included in the set #1 ₁ ) Representing the noise power delay spectrum for set #1.

The first device performs inverse fourier transform, for example, IFFT on the subcarriers included in the set #2, and obtains a power delay spectrum corresponding to the set #2 as:

wherein, F _p (m ₂ ) V (m) is a result of inverse Fourier transform of the subcarriers included in the set #2 ₂ ) The noise power delay spectrum corresponding to set #2 is shown.

At F _p (m ₁ )＝F _p (m ₂ )＝F _p Under the condition of (m), the first device may obtain power delay spectrums corresponding to multiple groups of subcarriers according to the power delay spectrums corresponding to the set #1 and the set #2 as follows:

wherein, F _p (m) represents a result obtained by performing inverse fourier transform on a plurality of groups of subcarriers.

Through the processing, the noise variance corresponding to the multiple groups of subcarriers can be reduced to half of the original noise variance, the signal-to-noise ratio is improved, the false alarm rate is reduced, and the sensing precision is improved.

In one possible scenario, in HE, EHT, HT, VHT scenarios, a first device may be referred to as a beamforming initiator (beamform), and a second device may be referred to as a beamforming receiver (beamform). In an EDMG scenario, a first device may be referred to as an initiator (initiator) and a second device may be referred to as a responder (responder).

Fig. 16 illustrates another approach provided by the present application, it being understood that the method 300 shown in fig. 16 is applicable to the scenario shown in fig. 1. The method 300 includes:

s310, the second device determines the target subcarrier.

Unlike the method 200, the second device in the method 300 may not need to determine the target subcarrier according to the first indication information transmitted by the first device. In the method 300, the second device has the capability of independently determining the target subcarrier.

The target subcarriers comprise a plurality of groups of subcarriers, the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are arranged between two adjacent groups of subcarriers in the plurality of groups of subcarriers.

Optionally, each group of subcarriers in the multiple groups of subcarriers includes the same number of subcarriers.

S320, the second device sends a first wireless frame, and the first wireless frame comprises CSI corresponding to the target subcarrier. Accordingly, the first device receives a first wireless frame.

Optionally, as a case, the first radio frame further includes a MIMO control field, where the MIMO control field is used to indicate the target subcarrier. For a manner of indicating the target subcarrier by the MIMO control field, refer to the description above, and for brevity, no further description is given here.

Optionally, as another case, the first radio frame further includes a digital fbck control field, and the digital fbck control field is used to indicate the target subcarrier. For the way that the digital fbck control field is used to indicate the target subcarrier, reference may be made to the above description, and details are not described herein for brevity.

In addition, before S320, the method 300 may further include S201 and S202 described above. For brevity, no further description is provided herein.

Further, after S320, optionally, the method 300 may further include S203 described above. For brevity, no further description is provided herein.

TABLE 1

Table 2:

TABLE 3

TABLE 4

TABLE 5

TABLE 6

TABLE 7

TABLE 8

TABLE 9

TABLE 10

TABLE 11

TABLE 11-2

TABLE 12

TABLE 12-2

Watch 13

TABLE 13-2

TABLE 14

TABLE 14-2

Watch 15

TABLE 15-2

TABLE 16

TABLE 16-2

TABLE 17

TABLE 17-2

Watch 18

TABLE 18-2

Watch 19

TABLE 19-2

Watch 20

TABLE 20-2

TABLE 21

TABLE 21-2

TABLE 22

TABLE 22-2

From the above discussion, it can be seen that the signal-to-noise ratio can be improved by using the scheme of the present application. It should be understood that the signal-to-noise ratio is associated with a false alarm rate. In one possible implementation, the higher the signal-to-noise ratio, the lower the false alarm rate. In order to test the performance of the proposed solution, the applicant designed and carried out monte carlo simulation tests.

Simulation test #1:

simulation experiment #1 was performed in a VHT scenario. The parameter settings for simulation test #1 are shown in table 23 below. When the first indication information comprises a first parameter and a second parameter, the parameters can be set according to a mode 1; when the first indication information is the third parameter, the parameter may be set in the manner 2.

TABLE 23

Fig. 17 is a simulation curve obtained by simulation test #1. The following is a description of the simulation curve obtained in simulation test #1.

Curve #1:

and the second equipment feeds back the CSI according to a feedback mode specified by the current protocol. The first device performs inverse Fourier transform on the subcarriers to obtain a corresponding power delay spectrum #1, and detects the power delay spectrum #1 to obtain a curve #1.

The generation process of the curve #1 will be described in detail below.

Since the first parameter is 2, that is, the Ng parameter is 2, when the second device feeds back CSI, 1 subcarrier is spaced between every two target subcarriers.

For example, the index of the subcarrier of the target CSI is: -58,-56,-54,-52,-50,-48,-46,-44,-42,-40,-38,-36,-34,-32,-30,-28,-26,-24,-22,-20,-18,-16,-14,-12,-10,-8,-6,-4,-2,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58.

And after receiving the CSI fed back by the second equipment, the first equipment performs inverse Fourier transform on the sub-carrier to obtain a power delay spectrum #1, and detects the power delay spectrum #1 to obtain a curve #1.

Curve #2:

and the second equipment feeds back the CSI according to a feedback mode specified by the current protocol. The first device, upon receiving the CSI, subdivides the subcarriers into a plurality of sets. And then, the first equipment respectively carries out inverse Fourier transform on the subcarriers of each set to obtain a power delay spectrum corresponding to each set. And the first equipment obtains a power delay spectrum #2 according to the power delay spectrum corresponding to each set, and detects the power delay spectrum #2 to obtain a curve #2.

The generation process of the curve #2 will be described in detail below.

The index of the target subcarrier is the same as in curve #1 and will not be described in detail here. The first device re-divides the target subcarriers into 2 sets.

Wherein the set #3 includes subcarriers having indices of-58, -54, -50, -46, -42, -38, -34, -30, -26, -22, -18, -14, -10, -6, -2,4,8,12,16,20,24,28,32,36,40,44,48,52,56.

Set #4 includes subcarriers having indices of-56, -52, -48, -44, -40, -36, -32, -28, -24, -20, -16, -12, -8, -4,2,6,10,14,18,22,26,30,34,38,42,46,50,54,58.

The first equipment carries out inverse Fourier transform on the subcarriers in the set #3 to obtain a power delay spectrum corresponding to the set # 3; similarly, the first device performs inverse fourier transform on the subcarriers in the set #4 to obtain a power delay spectrum corresponding to the set #4. Then, the first device obtains a power delay spectrum #2 according to the power delay spectrums corresponding to the set #3 and the set #4, and detects the power delay spectrum #2 to obtain a curve #2.

Curve #3:

the second device feeds back CSI according to the scheme proposed in this application, and the first device re-divides the multiple groups of subcarriers into multiple sets in the manner in S203. Then, the first device obtains a power delay spectrum #3 corresponding to a plurality of groups of subcarriers, and detects the power delay spectrum #3 to obtain a curve #3.

The generation process of the curve #3 will be described in detail below.

The index of the target subcarrier is-58, -57, -54, -53, -50, -49, -46, -45, -42, -41, -38, -37, -34, -33, -30, -29, -26, -25, -22, -21, -18, -17, -14, -13, -10, -9, -6, -5, -2,5, 6,9,10,13,14,17,18,21,22,25,26,29,30,33,34,37,38,41,42,45,46,49,50,53,54,57,58. Including multiple groups of subcarriers, the first device will subdivide the multiple groups of subcarriers into 2 sets since each group of subcarriers includes 2 subcarriers.

Wherein the set #5 comprises sub-carriers having indices of-58, -54, -50, -46, -42, -38, -34, -30, -26, -22, -18, -14, -10, -6, -2,5,9,13,17,21,25,29,33,37,41,45,49,53,57. That is, set #5 includes the first subcarrier from left to right for each of the groups of subcarriers.

The set #6 includes subcarriers having indices of-57, -53, -49, -45, -41, -37, -33, -29, -25, -21, -17, -13, -9, -5,2,6,10,14,18,22,26,30,34,38,42,46,50,54,58. That is, set #6 includes the second subcarrier from left to right for each of the groups of subcarriers.

The first equipment carries out inverse Fourier transform on the sub-carriers in the set #5 to obtain a power delay spectrum corresponding to the set # 5; similarly, the first device performs inverse fourier transform on the subcarriers in the set #6 to obtain a power delay spectrum corresponding to the set #6. Then, the first device obtains a power delay spectrum #3 according to the power delay spectrums corresponding to the set #5 and the set #6, and detects the power delay spectrum #3 to obtain a curve #3.

Analyzing fig. 17, it can be known from comparing curve #1 and curve #3, or curve #2 and curve #3, that the false alarm rate can be significantly reduced by using the scheme of the present application, thereby improving the accuracy of perception.

Simulation test #2:

simulation experiment #2 was performed in a VHT scenario. And the parameter settings of simulation trial #2 were the same as simulation trial #1.

Fig. 18 is a simulation curve obtained by simulation test #2. The following is a description of the simulation curve obtained in simulation test #2.

Curve #4:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back the CSI according to a feedback mode specified by the current protocol. The first device performs inverse Fourier transform on the subcarriers to obtain a power delay spectrum #4, and detects the power delay spectrum #4 to obtain a curve #4.

The following describes a subcarrier smoothing technique.

In a possible implementation manner, the second device performs channel estimation on N subcarriers, and performs weighted average on the channel estimation of the kth subcarrier, the channel estimation of the (k-1) th subcarrier, and the channel estimation of the (k + 1) th subcarrier to obtain the channel estimation of the kth subcarrier after smoothing.

Wherein,

representing the channel estimate for the k-th subcarrier after smoothing,

representing the channel estimate for the k-1 th sub-carrier,

representing the channel estimate for the k-th sub-carrier,

representing the channel estimate for the (k + 1) th subcarrier.

It should be understood that there may be other algorithms to achieve subcarrier smoothing, which are not listed here.

Curve #5:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back the CSI according to a feedback mode specified by the current protocol. The first device subdivides the subcarriers into a plurality of sets. Then, the first device performs inverse fourier transform on the subcarriers of each set respectively to obtain a power delay spectrum corresponding to each set. And the first device obtains a power delay spectrum #5 according to the power delay spectrum corresponding to each set, and detects the power delay spectrum #5 to obtain a curve #5.

Curve #6:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back CSI according to the scheme proposed in this application, and the first device re-divides the multiple groups of subcarriers into multiple sets in the manner in S203. Then, the first device obtains a power delay spectrum #6 corresponding to a plurality of groups of subcarriers, and detects the power delay spectrum #6 to obtain a curve #6.

Analyzing fig. 18, comparing curve #4 and curve #6, or curve #5 and curve #6, it can be seen that the false alarm rate can be significantly reduced by using the scheme of the present application, thereby improving the accuracy of perception.

Simulation test #3:

the parameter settings for simulation test #3 are shown in table 24 below.

Watch 24

Number of subcarriers	128
		Subcarrier spacing	312.5KHz
First parameter	4
		False alarm threshold	0.1
Number of times of simulation	10000

Fig. 19 is a simulation curve obtained by simulation test #3. The following is a description of the simulation curve obtained in simulation test #3.

Curve #7:

and the second equipment feeds back the CSI according to a feedback mode specified by the current protocol. The first device performs inverse Fourier transform on the subcarriers to obtain a corresponding power delay spectrum #7, and detects the power delay spectrum #7 to obtain a curve #7.

Curve #8:

and the second equipment feeds back the CSI according to a feedback mode specified by the current protocol. The first device subdivides the subcarriers into a plurality of sets. Then, the first device performs inverse fourier transform on the subcarriers of each set respectively to obtain a power delay spectrum corresponding to each set. And the first device obtains a power delay spectrum #8 according to the power delay spectrum corresponding to each set, and detects the power delay spectrum #8 to obtain a curve #8.

Curve #9:

the second device feeds back CSI according to the scheme proposed in this application, and the first device re-divides the multiple groups of subcarriers into multiple sets in the manner in S203. Then, the first device obtains a power delay spectrum #9 corresponding to a plurality of groups of subcarriers, and detects the power delay spectrum #9 to obtain a curve #9.

Analyzing fig. 19, by comparing curve #7 and curve #9, or curve #8 and curve #9, it can be known that the false alarm rate can be significantly reduced by using the scheme of the present application, so as to improve the accuracy of perception.

Simulation test #4:

the parameter settings of simulation test #4 were the same as those of simulation test #3.

Fig. 20 is a simulation curve obtained by simulation test #4. The following is a description of the simulation curve obtained in simulation test #4.

Curve #10:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back the CSI according to a feedback mode specified by the current protocol. The first device performs inverse fourier transform on the subcarriers to obtain a power delay spectrum #10, and detects the power delay spectrum #10 to obtain a curve #10.

Curve #11:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back the CSI according to a feedback mode specified by the current protocol. The first device subdivides the subcarriers into a plurality of sets. Then, the first device performs inverse fourier transform on the subcarriers of each set respectively to obtain a power delay spectrum corresponding to each set. The first device obtains a power delay spectrum #11 according to the power delay spectrum corresponding to each set, and detects the power delay spectrum #11 to obtain a curve #11.

Curve #12:

and after receiving the sensing signal sent by the first equipment, the second equipment adopts a subcarrier smoothing technology to smooth the subcarriers. Then, the second device feeds back CSI according to the scheme proposed in this application, and the first device re-divides the multiple groups of subcarriers into multiple sets in the manner in S203. Then, the first device obtains a power delay spectrum #12 corresponding to a plurality of groups of subcarriers, and detects the power delay spectrum #12 to obtain a curve #12.

Analyzing fig. 20, it can be seen from comparing curve #10 and curve #12, or curve #11 and curve #12, that the false alarm rate can be significantly reduced by using the scheme of the present application, thereby improving the accuracy of perception.

In accordance with the foregoing method, fig. 21 shows a communication apparatus (e.g., a first device, and also a second device) provided in an embodiment of the present application, where the communication apparatus includes a transceiving unit 2101 and a processing unit 2102.

The transceiving unit 2101 may be configured to implement a corresponding communication function. The transceiving unit 2101 may also be referred to as a communication interface or communication unit. The processing unit 2102 may be used to perform processing operations.

Optionally, the communication apparatus further includes a storage unit, and the storage unit may be configured to store instructions and/or data, and the processing unit 2102 may read the instructions and/or data in the storage unit to implement the actions performed by the first device in the foregoing various method embodiments or to implement the actions performed by the second device in the foregoing various method embodiments.

In a first design, the communication device may be the first device in the foregoing embodiments, or may be a component (e.g., a chip) of the first device. The communication apparatus may implement the steps or the flow corresponding to the steps or the flow performed by the first device in the above method embodiment, where the transceiving unit 2101 may be configured to perform the transceiving related operations of the first device in the above method embodiment, and the processing unit 2102 may be configured to perform the processing related operations of the first device in the above method embodiment.

Specifically, the processing unit 2102 is configured to generate first indication information, where the first indication information is used to indicate CSI corresponding to a target subcarrier; the transceiving unit 2101 is configured to transmit the first indication information.

In a possible implementation manner, the transceiving unit 2101 is further configured to receive a first wireless frame, where the first wireless frame includes CSI corresponding to a target subcarrier.

In a second design, the communication device may be the second device in the foregoing embodiments, or may be a component (e.g., a chip) of the second device. The communication apparatus may implement the steps or processes corresponding to those executed by the second device in the foregoing method embodiment, where the transceiving unit 2101 may be configured to execute the transceiving related operations of the second device in the foregoing method embodiment, and the processing unit 2102 may be configured to execute the processing related operations of the second device in the foregoing method embodiment.

As one case, the transceiving unit 2101 is configured to receive first indication information, where the first indication information is used to indicate channel state information CSI corresponding to a target subcarrier; a processing unit 2102 configured to determine a target subcarrier according to the first indication information; the transceiving unit 2101 is further configured to send a first wireless frame, where the first wireless frame includes CSI corresponding to the target subcarrier.

As another case, the processing unit 2102 is configured to determine a target subcarrier. The transceiving unit 2101 is configured to transmit a first wireless frame, where the first wireless frame includes CSI corresponding to a target subcarrier.

Optionally, the first radio frame further includes a MIMO control field, and the MIMO control field is used to indicate the target subcarrier.

Optionally, the first radio frame further includes a digital fbck control field, and the digital fbck control field is used for indicating the target subcarrier.

It should be understood that the specific processes of the units for executing the corresponding steps have been described in detail in the above embodiments of the methods, and therefore, for brevity, are not described again here.

It should also be understood that the communication means herein are embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, as will be understood by those skilled in the art, the communication apparatus may be specifically a first device in the foregoing embodiment, and may be configured to execute each procedure and/or step corresponding to the first device in each method embodiment, or the communication apparatus may be specifically a second device in the foregoing embodiment, and may be configured to execute each procedure and/or step corresponding to the second device in each method embodiment, and details are not described herein again to avoid repetition.

The communication device has the function of implementing the corresponding steps executed by the first device or the second device in the method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transceiver (for example, the transmitting unit in the transceiver unit may be replaced by a transmitter, and the receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, may be replaced by a processor, so as to perform the transceiving operation and the related processing operation in the respective method embodiments, respectively.

The transmitting/receiving unit 2101 may be a transmitting/receiving circuit (for example, may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be noted that the communication apparatus in fig. 21 may be the first device or the second device in the foregoing embodiment, and may also be a chip or a chip system, for example: system on chip (SoC). The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. And are not limited herein.

An embodiment of the present application further provides a communication device, as shown in fig. 22, including: a processor 2201 and a communications interface 2202.

The processor 2201 is configured to execute computer programs or instructions stored in the memory 2203, or read data stored in the memory 2203, so as to execute the methods in the above method embodiments. Optionally, the processor 2201 is one or more.

Communication interface 2202 is used for the reception and/or transmission of signals. For example, processor 2201 is configured to control communication interface 2202 to receive and/or transmit signals.

Optionally, as shown in fig. 22, the communication device further comprises a memory 2203, the memory 2203 being configured to store computer programs or instructions and/or data. The memory 2203 may be integrated with the processor 2201 or may be provided separately. Optionally, the memory 2203 is one or more.

Optionally, the processor 2201, the communication interface 2202, and the memory 2203 are interconnected via a bus 2204; the bus 2204 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 2204 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but that does not indicate only one bus or one type of bus.

When the communication device is a first device, the processor 2201 is configured to generate first indication information, where the first indication information is used to indicate CSI corresponding to a target subcarrier; a communication interface 2202 for transmitting the first indication information.

In one possible implementation, the communication interface 2202 is further configured to receive a first wireless frame, where the first wireless frame includes CSI corresponding to a target subcarrier.

When the communication device is a second device, as a case may be, the communication interface 2202 is configured to receive first indication information, where the first indication information is used to indicate CSI corresponding to a target subcarrier; a processor 2201, configured to determine a target subcarrier according to the first indication information; communication interface 2202 is further configured to transmit a first wireless frame, the first wireless frame including CSI for the target subcarrier.

When the communication device is a second device, as another case, the processor 2201 is configured to determine a target subcarrier. A communication interface 2202 configured to transmit a first wireless frame, the first wireless frame including CSI for a target subcarrier.

It should be understood that the processor (e.g., the processor 2201) mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of the CPU and the NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

It will also be appreciated that the memory referenced in the embodiments of the subject application (e.g., memory 2203) may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the method comprises the steps that first indication information is generated by first equipment, wherein the first indication information is used for indicating Channel State Information (CSI) corresponding to a target subcarrier, and the target subcarrier comprises a plurality of groups of subcarriers, wherein the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers;

and the first equipment sends the first indication information.

2. A method of communication, comprising:

the method comprises the steps that a second device receives first indication information, wherein the first indication information is used for indicating Channel State Information (CSI) corresponding to a target subcarrier, and the target subcarrier comprises a plurality of groups of subcarriers, wherein the plurality of groups of subcarriers comprise a group of subcarriers consisting of at least 2 adjacent subcarriers, and a certain number of non-target subcarriers are spaced between two adjacent groups of subcarriers in the plurality of groups of subcarriers;

and the second equipment sends a first wireless frame, wherein the first wireless frame comprises CSI corresponding to the target subcarrier.

3. The method according to claim 1 or 2,

the first indication information comprises a first parameter and a second parameter;

the first parameter and the second parameter jointly indicate the target subcarrier, specifically refer to table 1, table 3 to table 6, table 11 and table 12, and table 15 to table 18.

4. The method according to claim 1 or 2,

the first indication information comprises a third parameter;

the third parameter indicates the target subcarrier, specifically referring to table 2, table 7 to table 10, table 13 and table 14, and table 19 to table 22.

5. The method of claim 1,

the first device sends the first indication information, including:

6. The method of claim 2,

the second device receives first indication information, including:

and the second equipment receives a Null Data Packet Announcement (NDPA) frame, and the first indication information is borne in a station information (STA) Info field of the NDPA frame.

7. The method according to claim 5 or 6,

the association identifier AID of the STA Info field is a specific value;

the bits B16 and B17 in the STA Info field carry a first parameter, and the bits B18 and B19 carry a second parameter.

8. The method according to claim 5 or 6,

the bits B25 and B26 in the STA Info field carry a first parameter, and the bits B29 and B30 carry a second parameter.

9. The method according to claim 5 or 6,

the association identifier AID of the STA Info field is a specific value;

the B17 bit, B18 bit, and B19 bit in the STA Info field carry a third parameter.

10. The method according to claim 5 or 6,

the B25 bit, B26 bit, and B29 bit in the STA Info field carry a third parameter.

11. The method of claim 1, further comprising:

the first device receives a first wireless frame, where the first wireless frame includes CSI corresponding to the target subcarrier.

12. The method according to claim 2 or 11,

the first wireless frame further includes a multiple-input multiple-output control, MIMO, control field indicating the target subcarrier.

13. The method of claim 12,

the B8 bits in the MIMO control field carry a first parameter, and the B48 bits and the B49 bits carry a second parameter.

14. The method of claim 12,

the B11 bit in the MIMO control field carries a first parameter, and the B14 bit and the B15 bit carry a second parameter.

15. The method of claim 12,

the B8 bits and the B9 bits in the MIMO control field carry a first parameter, and the B24 bits and the B25 bits carry a second parameter.

16. The method of claim 12,

the B8 bit, the B48 bit, and the B49 bit in the MIMO control field carry a third parameter.

17. The method of claim 12,

the B11 bit, the B14 bit, and the B15 bit in the MIMO control field carry a third parameter.

18. The method of claim 12,

the B8 bit, the B9 bit, and the B24 bit in the MIMO control field carry a third parameter.

19. The method according to claim 13 or 16,

the first wireless frame is a high-efficiency compressed beamforming (HE) compressed beamforming frame.

20. The method of claim 14 or 17,

the first wireless frame is a very high throughput beamformed EHT compressed beamforming frame.

21. The method of claim 15 or 18,

the first wireless frame is a high throughput/very high throughput compressed beamformed beamforming frame.

22. The method according to claim 2 or 11,

the first wireless frame also includes a digital feedback control digital fbck control field indicating the target subcarrier.

23. The method of claim 22,

the bits B16 and B17 in the digital fbck control field carry the first parameter, and the bits B30 and B31 carry the second parameter.

24. The method of claim 22,

the B16, B17 and B30 bits in the digital fbck control field carry a third parameter.

25. The method of any one of claims 22-24,

the first wireless frame is a MIMO beamforming feedback frame.

26. The method of any one of claims 1-25,

each group of subcarriers in the multiple groups of subcarriers comprises the same number of subcarriers.

27. The method of any one of claims 1-26,

and the adjacent two groups of subcarriers in the plurality of groups of subcarriers are spaced by the same number of non-target subcarriers.

28. A communications device comprising means for performing the method of any of claims 1-27.

29. A communication device, comprising: a processor for executing a computer program or instructions stored in a memory, causing the communication device to perform the method of any of claims 1-27.

30. A computer-readable storage medium, storing a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-27.

31. A computer program product, the computer program product comprising: computer program, which, when executed, causes a computer to perform the method of any of claims 1-27.

32. A chip, comprising: at least one processor configured to execute computer programs or instructions in a memory such that the method of any of claims 1-27 is implemented.