Communication sensing method and device and storage medium

Abstract

The invention discloses a communication sensing method and device and a storage medium. The method comprises: sending a sensing signal to a target to be measured on a first time domain resource and a first frequency domain resource, and receiving at least one communication signal from at least one station on the first time domain resource and a second frequency domain resource, the first frequency domain resource and the second frequency domain resource not overlapping; and receiving an echo signal reflected by the to-be-measured target. According to the embodiment of the invention, the sensing signal can be sent to the to-be-detected target while the at least one communication signal from the at least one station is received, so that the continuity of receiving and transmitting of the Wi-Fi sensing signal in time can be improved in a conventional communication state, and the sensing performance is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication perception method, device and storage medium. Background Art

[0002] In addition to communication functions, Wi-Fi technology can also be used to realize wireless sensing functions, such as intrusion detection, motion recognition, gesture recognition, etc.

[0003] like Figure 1 As shown in the figure, it is a schematic diagram of a Wi-Fi radar. During the normal communication process of Wi-Fi device A and Wi-Fi device B, their signals reach the target to be measured and can be reflected back to Wi-Fi device A and / or Wi-Fi device B by the target to be measured, so that a radar-like device can be constructed for wireless sensing, and the distance, speed, Doppler and other information of the target to be measured can be obtained. This technology is called "Wi-Fi radar" technology.

[0004] The calculation of velocity / Doppler information is based on the phase changes of echo signals at multiple times. The theoretical maximum detectable velocity v max It is related to the observation time interval τ of the echo signal. The smaller the observation time interval τ is, the greater the maximum detectable velocity v max The bigger.

[0005] like Figure 2 As shown, it is a schematic diagram that a Wi-Fi device can sense simultaneously when it is used as a transmitter. Since the Wi-Fi communication system adopts a time division duplex (TDD) mechanism, when the Wi-Fi device X is used as a transmitter, its receiver (RX) is in a communication idle state. At this time, by turning on RX to receive the echo data of the target to be measured, a radar device can be constructed to detect the state of the target to be measured.

[0006] However, when Wi-Fi device X is used as the receiving end, its RX must receive the communication signal from the other end (Wi-Fi device Y in the figure). Even if its TX is idle at this time, the radar device cannot be constructed and the detection function will be interrupted. Figure 3 The schematic diagram shown is that the Wi-Fi device cannot sense at the same time when acting as a receiving end.

[0007] According to the above description, if the Wi-Fi device continuously acts as a transmitter, its detection function can be well maintained. However, if the Wi-Fi device intermittently acts as a receiver, the continuity of radar detection cannot be guaranteed. When the detection interval is too large, the maximum detectable speed v max Take 2.4GHz and 5.8GHz center frequencies as an example, to ensure v max≥5m / s (supports conventional human motion detection), the detection intervals need to be ≤6.25ms and ≤2.59ms respectively. In addition, when the observation interval uniformity is insufficient, the speed measurement accuracy decreases. In general, when the detection opportunity cannot be guaranteed, the overall perception performance will be reduced.

[0008] In view of this, under normal communication conditions, how to improve the temporal continuity of Wi-Fi sensing signal transmission and reception, thereby improving sensing performance, is an urgent problem to be solved. Summary of the invention

[0009] The present application provides a communication perception method, device and storage medium to improve the temporal continuity of Wi-Fi perception signal transmission and reception under normal communication conditions, thereby improving perception performance.

[0010] In a first aspect, a communication perception method is provided, the method comprising: sending a perception signal to a target to be measured on a first time domain resource and a first frequency domain resource, and receiving at least one communication signal from at least one station on the first time domain resource and a second frequency domain resource, wherein the first frequency domain resource and the second frequency domain resource do not overlap; and receiving an echo signal reflected by the target to be measured. In this aspect, by sending a perception signal to the target to be measured while receiving at least one communication signal from at least one station, the temporal continuity of the transmission and reception of Wi-Fi perception signals can be improved in a normal communication state, thereby improving the perception performance.

[0011] In a possible implementation, the method further includes: performing sensing measurement on the target to be measured according to the echo signal. In this implementation, by sending a sensing signal to the target to be measured, an echo signal from the target to be measured can be received, so that the target to be measured can be sensed and measured to obtain the position, distance, speed, Doppler information, etc. of the target to be measured. In addition, since the echo signal of the target to be measured can be continuously received in the conventional communication state, the detection interval can be reduced, the uniformity of the observation interval can be improved, and finally the sensing performance can be improved.

[0012] In another possible implementation, the first time domain resource is configurable to be an integer multiple of a symbol duration. In this implementation, the time domain resource for sending the perception signal may be the same as or different from the time domain resource for receiving at least one communication signal.

[0013] In another possible implementation, the sensing signal is a frequency modulated continuous wave (FMCW) signal or an orthogonal frequency division multiplexing (OFDM) signal. In this implementation, the sensing signal can be an FMCW signal with better detection performance, or a conventional OFDM signal, or a signal of other waveforms, which can be flexibly determined according to detection requirements.

[0014] In another possible implementation, the perception signal is the OFDM signal, and the perception signal includes first indication information, and the first indication information indicates that the OFDM signal is used for perception. In this implementation, when the perception signal is a conventional OFDM signal, the perception signal may also include first indication information for indicating that the OFDM signal is used for perception. After receiving the OFDM signal, at least one station may learn that the OFDM signal is used for perception, thereby learning that the opposite end has a wireless perception function, and may send a perception task request to the opposite end.

[0015] In another possible implementation, the method further includes: sending a trigger frame to the at least one station, the trigger frame including information about the following resources: the first time domain resource, the first frequency domain resource, and the second frequency domain resource. In this implementation, the resource for sending the perception signal is configured by the trigger frame, so that the perception signal can be sent while receiving the communication signal, thereby improving the temporal continuity of the transmission and reception of the Wi-Fi perception signal in the normal communication state and improving the perception performance.

[0016] In yet another possible implementation, after the trigger frame is sent, the access point sends the perception signal once according to resource allocation in the trigger frame.

[0017] In another possible implementation, after the trigger frame is sent, the access point sends the perception signal according to the resource allocation in the trigger frame until the number of signals indicated in the trigger frame is met, that is, the information of the number of signals is included in the trigger frame.

[0018] In yet another possible implementation, after the trigger frame is sent, the access point sends the perception signal according to resource allocation in the trigger frame until a new trigger frame is generated.

[0019] In another possible implementation, the higher the distance resolution required to be detected, the more first frequency domain resources are required. In this implementation, the distance resolution required to be detected is inversely proportional to the bandwidth of the sensing signal. Therefore, according to actual detection requirements, the higher the distance resolution required to be detected, the more first frequency domain resources are required to be allocated.

[0020] In another possible implementation, the trigger frame includes second indication information, and the second indication information is used to indicate that the sending end has a wireless sensing function. In this implementation, the indication information is carried in the trigger frame to indicate that the sending end has a wireless sensing function, so that after the opposite end receives the trigger frame, it can send a sensing task request to the opposite end.

[0021] In another possible implementation, the method further includes: sending a physical layer protocol data unit (PHY protocol data unit, PPDU) to the at least one site, the PPDU including third indication information, the third indication information being used to indicate that the transmitting end has a wireless sensing function. In this implementation, when sending the PPDU to the site in the downlink, the indication information can be carried in the PPDU to indicate that the transmitting end has a wireless sensing function, so that after the opposite end receives the trigger frame, it can send a sensing task request to the opposite end.

[0022] In a second aspect, a communication perception device is provided for implementing the communication perception method in the above-mentioned first aspect or any one of the implementations of the first aspect. The device may be a communication perception device, or a module (such as a processor, a chip, or a chip system, etc.) applied to a communication perception device, or a logical node, a logical module, or software that can implement all or part of the functions of a communication perception device. In one implementation, the communication perception device may include a sending unit, a receiving unit, and may also include a processing unit. The sending unit and the receiving unit may be independent or combined together (which may be referred to as a "transceiver unit").

[0023] In a possible implementation, the communication sensing device may include a sending unit, a receiving unit, and may also include a processing unit. The sending unit and the receiving unit may be independent or combined together (may be referred to as a "transceiver unit").

[0024] Among them, the sending unit is used to send a perception signal to the target to be measured on a first time domain resource and a first frequency domain resource; the receiving unit is used to receive at least one communication signal from at least one site on the first time domain resource and a second frequency domain resource, and the first frequency domain resource and the second frequency domain resource do not overlap; and the receiving unit is also used to receive an echo signal reflected by the target to be measured.

[0025] Optionally, the processing unit is further used to perform perception measurement on the target to be measured according to the echo signal.

[0026] Optionally, the first time domain resource is configurable to be an integer multiple of a symbol duration.

[0027] Optionally, the perception signal is a frequency modulated continuous wave signal or an OFDM signal.

[0028] Optionally, the perception signal is the OFDM signal, and the perception signal includes first indication information, where the first indication information indicates that the OFDM signal is used for perception.

[0029] Optionally, the sending unit is further used to send a trigger frame to the at least one site, and the trigger frame includes information about the following resources: the first time domain resources, the first frequency domain resources, and the second frequency domain resources.

[0030] Optionally, the higher the range resolution required for detection, the more the first frequency domain resources are.

[0031] Optionally, the trigger frame includes second indication information, and the second indication information is used to indicate that the sending end has a wireless sensing function.

[0032] Optionally, the sending unit is further used to send a PPDU to the at least one site, and the PPDU includes third indication information, and the third indication information is used to indicate that the sending end has a wireless sensing function.

[0033] In another possible implementation, the communication perception device in the above-mentioned second aspect includes a processor coupled to a memory; the processor is configured to enable the device to perform the corresponding functions in the above-mentioned communication perception method. The memory is used to couple with the processor, which stores the necessary programs (instructions) and / or data for the device. Optionally, the communication perception device may also include a communication interface for realizing communication between the device and other network elements. Optionally, the memory may be located inside the communication perception device or outside the communication perception device.

[0034] In another possible implementation, the communication perception device in the second aspect includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is used to execute a computer program or instruction to control the transceiver to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or execute code instructions. The transceiver may be a transceiver, a transceiver circuit or an input-output interface, which is used to receive signals from other communication perception devices other than the communication perception device and transmit them to the processor or send signals from the processor to other communication perception devices other than the communication perception device. When the communication perception device is a chip, the transceiver is a transceiver circuit or an input-output interface.

[0035] When the communication sensing device in the second aspect is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the communication sensing device is a terminal, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

[0036] According to a third aspect, a computer-readable storage medium is provided, wherein a computer program or instruction is stored in the computer-readable storage medium. When the computer program or instruction is executed, the method described in the first aspect or any one of the implementations of the first aspect is implemented.

[0037] In a fourth aspect, a computer program product comprising instructions is provided. When the instructions are executed on a communication awareness device, the communication awareness device executes the method described in the first aspect or any one implementation of the first aspect.

[0038] In a fifth aspect, a communication perception system is provided, which includes at least one site, a target to be measured, and a communication perception device as described in the second aspect or any one of the implementations of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the Wi-Fi radar;

[0040] Figure 2 This is a schematic diagram of how a Wi-Fi device can sense data simultaneously when it is used as a transmitter.

[0041] Figure 3 This is a schematic diagram showing that a Wi-Fi device cannot sense at the same time when it is a receiving end;

[0042] Figure 4 A schematic diagram of a Wi-Fi wireless communication system architecture provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of resource division based on OFDMA provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of a downlink OFDMA provided in an embodiment of the present application;

[0045] Figure 7 A schematic diagram of sending a trigger frame for resource allocation in uplink OFDMA provided in an embodiment of the present application;

[0046] Figure 8 A schematic diagram of an uplink OFDMA provided in an embodiment of the present application;

[0047] Fig. 9A flow chart of a communication perception method provided in an embodiment of the present application;

[0048] Fig.10a A schematic diagram of time domain resource allocation of a perception signal according to an example of an embodiment of the present application;

[0049] Fig.10b A schematic diagram of time domain resource allocation of another perception signal according to an example of an embodiment of the present application;

[0050] Fig.11a A schematic diagram of the overall format of a trigger frame shown in an embodiment of the present application;

[0051] Fig.11b A schematic diagram of the format of the common information field of the trigger frame shown in the embodiment of the present application;

[0052] Fig.11c A schematic diagram of the format of the user information field of the trigger frame shown in the embodiment of the present application;

[0053] Fig.12 A schematic diagram showing that a Wi-Fi device can sense data simultaneously when it is used as a receiving end;

[0054] Fig.13 A schematic diagram of the structure of a communication sensing device provided in an embodiment of the present application;

[0055] Fig.14 A schematic diagram of the structure of another communication sensing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0057] It should be understood that the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5G communication system and future 6G communication system, etc.

[0058] It should also be understood that the embodiments of the present application can also be applied to various communication systems based on non-orthogonal multiple access technology, such as sparse code multiple access (SCMA) system. Of course, SCMA can also be called other names in the communication field; further, the technical solutions of the embodiments of the present application can be applied to multi-carrier transmission systems using non-orthogonal multiple access technology, such as orthogonal frequency division multiplexing (OFDM), filter bank multi-carrier (FBMC), generalized frequency division multiplexing (GFDM), filtered orthogonal frequency division multiplexing (F-OFDM) systems, etc.

[0059] It should also be understood that the embodiments of the present application can be applied to LTE systems, 5G systems and subsequent evolution systems such as 6G, or other wireless communication systems that adopt various wireless access technologies, such as systems that adopt code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access and other access technologies, and are particularly suitable for scenarios that require channel information feedback and / or the application of secondary precoding technology, such as wireless networks that use massive multiple input multiple output (Massive MIMO) technology, wireless networks that use distributed antenna technology, etc.

[0060] It should also be understood that the embodiments of the present application can be applied to Wi-Fi wireless communication. The Wi-Fi wireless communication system includes an access point (AP) and a station (STA). A station can also be called a station. The wireless communication scenarios involved may include: communication between AP and STA, communication between AP and AP, and communication between STA and STA. The embodiments of the present application are described by taking the communication between AP and STA as an example. Figure 4 As shown, AP1 can communicate wirelessly with STA1 and STA2, and AP2 can communicate wirelessly with STA1 and STA2. It should be understood that the method described in the embodiment of the present application is also applicable to communication between APs and between STAs.

[0061] The AP and STA in the embodiment of the present application may include a media access control layer (MAC) and a physical layer (PHY) in structure. The AP and STA may transmit information and / or data through PPDU, and when the wireless communication protocols used by the AP and STA are different, the frame structure of the PPDU will also be different.

[0062] As described in the background art, if the Wi-Fi device continuously acts as a transmitter, its detection function can be well maintained. However, if the Wi-Fi device intermittently acts as a receiver, the continuity of radar detection cannot be guaranteed.

[0063] In addition, in the prior art, independent Wi-Fi radar devices are operated on dedicated channels. This method will continue to occupy communication channels and cannot be deeply integrated with existing Wi-Fi communication devices.

[0064] For another example, in the prior art, the communication mode and the radar mode are switched in a time-division manner. The radar mode of this method will occupy an extra time window, which may cause the communication delay to deteriorate.

[0065] In response to the above-mentioned problem of how to ensure the continuity of Wi-Fi radar detection and improve the overall perception performance, an embodiment of the present application provides a communication perception solution, which can send a perception signal to the target to be measured while receiving at least one communication signal from at least one site, thereby improving the temporal continuity of Wi-Fi perception signal reception and transmission in a normal communication state and improving the perception performance.

[0066] First, let’s explain the terms that may be involved in the embodiments of this application:

[0067] (1) As mentioned above, by processing the echo signal, the distance, speed / Doppler and other information of the target to be measured can be obtained.

[0068] The calculation of distance information is based on the difference between the sensing signal and the echo signal. A typical method is to perform correlation processing on the sensing signal and the echo signal. In theory, the detection distance resolution R res Related to the bandwidth B of the sensing signal / echo signal:

[0069]

[0070] That is, the higher the bandwidth, the finer the theoretical distance resolution. Where c is the speed of light.

[0071] The calculation of velocity / Doppler information is based on the phase change of the echo signal at multiple moments, namely the Doppler effect. A typical method is to process the echo data at multiple consecutive observation moments using discrete Fourier transform (DFT).

[0072] Theoretically, the velocity resolution v res Related to the continuous observation time T:

[0073]

[0074] That is, the longer the continuous observation time, the finer the theoretical velocity resolution.

[0075] Theoretically, the maximum detectable speed v max The observation time interval τ is related to:

[0076]

[0077] That is, the smaller the observation time interval, the greater the theoretical maximum detectable speed.

[0078] (2) Orthogonal frequency-division multiple access (OFDMA) mechanism

[0079] The OFDMA mechanism allows multiple users to share bandwidth resources by dividing resource units (RUs), thereby improving the efficiency of multi-user communications.

[0080] like Figure 5 As shown, a schematic diagram of resource partitioning based on OFDMA provided in an embodiment of the present application is provided, wherein the time domain unit may be a symbol, and the frequency domain unit may be a subcarrier. The OFDMA mechanism divides the frequency domain into multiple subcarriers. For example, the bandwidth of each subcarrier is defined as 78.125KHz in the Wi-Fi 6 standard; the corresponding time domain is divided in units of symbols, and each symbol is 12.8us. A specific number of subcarrier combinations is called RU.

[0081] For downlink OFDMA, the AP can flexibly allocate RUs of different bandwidths to different STAs based on factors such as client capabilities, packet size, required application quality of service (QoS), and channel conditions. Figure 5 In the example, the AP allocates frequency domain resources to six STAs, and each STA is allocated one or more RUs. Figure 6As shown, it is a schematic diagram of a downlink OFDMA provided in an embodiment of the present application. The AP encapsulates the data of multiple STAs into one PPDU frame and sends it to multiple STAs at the same time, thereby amortizing the preamble overhead and air interface contention overhead.

[0082] For uplink OFDMA, Figure 7 As shown, it is a schematic diagram of sending a trigger frame for resource allocation in an uplink OFDMA according to an embodiment of the present application. The AP first agrees with multiple STAs on the timing and window period of each uplink transmission through a trigger frame, and indicates the subchannel, modulation and coding scheme (MCS) rate and transmit power that each STA can use, so that the transmission of all STAs can start and / or end at the same time, thereby reducing uplink contention and achieving better bandwidth utilization. Figure 8 A schematic diagram of an uplink OFDMA provided by an embodiment of the present application is shown.

[0083] The communication perception method provided in the embodiment of the present application is described in detail below:

[0084] like Fig. 9 As shown, it is a flow chart of a communication perception method provided in an embodiment of the present application. In this embodiment, AP is used as the execution subject of the method, and the execution subject can of course also be other communication perception devices. In this embodiment, the AP can be used as a transmitting end and a receiving end.

[0085] Exemplarily, the method may include the following steps:

[0086] S901. The AP sends a trigger frame to at least one STA. Correspondingly, at least one STA receives the trigger frame.

[0087] In this embodiment, the AP may allocate time-frequency resources to at least one STA with which it performs data transmission, so that at least one STA transmits data to the AP on the allocated time-frequency resources. For example, the AP allocates second frequency domain resources to at least one STA. If the AP allocates frequency domain resources to one STA, the AP allocates the second frequency domain resources to the STA; if the AP allocates frequency domain resources to multiple STAs, the AP may divide the second frequency domain resources into multiple RUs based on the above-mentioned OFDMA mechanism, and flexibly allocate RUs of different bandwidths to different STAs.

[0088] In addition, the AP may also allocate the first frequency domain resource to itself for sending the perception signal. For example, the AP may allocate the first frequency domain resource (including one or more RUs) to the AP's own basic service set identifier (BSSID).

[0089] like Fig.10a As shown, a schematic diagram of time domain resource allocation of a sensing signal according to an example of an embodiment of the present application is shown, in which the AP allocates a first frequency domain resource to itself and allocates a second frequency domain resource to STA1 to STA6, and each STA is allocated one or more RUs in the second frequency domain resource. In addition, the AP also allocates the first time domain resource to itself and STA1 to STA6, that is, the time domain resources allocated to itself and STA1 to STA6 are the same.

[0090] like Fig.10b As shown, it is a schematic diagram of time domain resource allocation of another perception signal according to an example of an embodiment of the present application, in which the AP allocates the first frequency domain resource to itself and allocates the second frequency domain resource to STA1 to STA6, and each STA is allocated one or more RUs in the second frequency domain resource. In addition, the AP also allocates the first time domain resource to itself and allocates the second time domain resource to STA1 to STA6, that is, the time domain resource allocated to itself is less than the time domain resource allocated to STA1 to STA6.

[0091] Exemplarily, the AP can carry the time-frequency resource information allocated to at least one STA and the time-frequency resource information allocated to the AP itself through a trigger frame. Specifically, the trigger frame includes the information of the following resources: a first time domain resource, a first frequency domain resource, and a second frequency domain resource. The trigger frame carries the time-frequency resource information allocated to the AP itself, and is used to inform at least one STA that part of the time-frequency resources is allocated to the AP itself.

[0092] like Fig.11a As shown, it is a schematic diagram of the overall format of the trigger frame shown in the embodiment of the present application, and the trigger frame includes the following fields: frame control, duration, receiving address (RA), timing advance (TA), common information, user information list, padding, frame check sequence (FCS). The information of the above resources can be located in the above resource allocation field. Exemplarily, the above resources can also be reserved or pre-defined by the protocol, so this step is optional and is represented by a dotted line in the figure.

[0093] Among them, Fig.11bAs shown, it is a schematic diagram of the format of the common information field of the trigger frame shown in an embodiment of the present application, and the common information field includes the following subfields: trigger type (trigger type), uplink length (UL length), more trigger frames (more TF), call request (CS required), uplink bandwidth (uplink bandwidth, UL BW), guard interval and high-efficiency long training sequence type (GI and HE-LTF type), multi-user-multiple input and multiple output high-efficiency long training sequence mode (MU-MIMO HE-LTF mode), high-efficiency long training sequence field symbol number and intermediate code period (number ofHE-LTF symbols and midamble periodicity), uplink space-time block code (UL STBC), low-density parity check code extra symbol segment (LDPC extra symbol segment), AP transmit power (AP Txpower), forward error correction code before filling factor (Pre-FEC padding factor), data packet extension disambiguation (PE disambiguity), uplink spatial multiplexing (UL spatial reuse), Doppler, uplink high-efficiency signaling field A2 reserved (UL HE-SIG-A2 reserved), reserved fields and trigger dependent common info.

[0094] like Fig.11c As shown, it is a format diagram of the user information field of the trigger frame shown in the embodiment of the present application, and the user information field includes the following subfields: the last 12 bits of the association identifier (association identifier, AID) 12, resource unit allocation (RU allocation), uplink forward error correction code coding type (UL FEC Coding Type), uplink high-efficiency modulation and coding system (UL HE-MCS), uplink dual-carrier modulation DCM, spatial stream allocation / receiving address-resource unit information (SSallocation / RA-RU information), uplink target receive power (UL target receive power), reserved field and trigger-related user information (trigger dependent user info).

[0095] The AP may also agree on a transmission timing and window with at least one STA through a trigger frame, so that at least one STA may transmit data according to the transmission timing within the same transmission window.

[0096] In addition, in order to distinguish it from a conventional trigger frame, the trigger frame in this embodiment may also include second indication information, and the second indication information is used to indicate that the AP has a wireless sensing function. Therefore, when at least one STA receives the trigger frame, it parses and obtains the second indication information, and can learn that the AP has a wireless sensing function, so that it can send a sensing task request to the AP.

[0097] Exemplarily, the second indication information may be located in a reserved subfield (also called a reserved bit) in a common information field or a user information field of the trigger frame.

[0098] In addition, the distance resolution R required to be detected is res The relationship with the bandwidth B of the sensing signal / echo signal shows that the higher the bandwidth, the finer the theoretical distance resolution. Therefore, based on the detection performance requirements, if the detection distance resolution is higher, more first frequency domain resources can be allocated to the AP itself.

[0099] Table 1 below shows several typical distance resolutions R res Relationship with bandwidth B:

[0100] Table 1

[0101] B <![CDATA[R res ]]> 20MHz 7.5m 40MHz 3.75m 80MHz 1.875m 160MHz 0.9375m 320MHz 0.46875m

[0102] S902. At least one STA sends at least one communication signal to the AP on the first time domain resource and the second frequency domain resource. Correspondingly, the AP receives at least one communication signal from the at least one STA on the first time domain resource and the second frequency domain resource.

[0103] The AP allocates time-frequency resources to at least one STA, so each STA can send communication signals to the AP on the time-frequency resources allocated to it. Correspondingly, the AP receives communication signals sent by each STA on the corresponding time-frequency resources.

[0104] Exemplarily, each STA may send a communication signal to the AP within a configured transmission window and at a configured transmission timing.

[0105] S903. The AP sends a perception signal to the target to be measured using a first time domain resource and a first frequency domain resource.

[0106] Since the AP allocates time-frequency resources to itself, the AP can send a perception signal to the target to be measured on the time-frequency resources allocated to itself (i.e., the first time domain resources, the first frequency domain resources). Exemplarily, the AP's TX can send the perception signal and the communication signal respectively in the configured transmission window with the at least one STA according to the configured transmission timing based on the allocated time-frequency resources, that is, the above steps S902 and S903 can be performed simultaneously.

[0107] As in the background technology Figure 3 As shown, when the AP, as a receiving end, receives a communication signal sent by at least one STA, its TX is idle and cannot send a sensing signal, thus causing discontinuous detection.

[0108] In this embodiment, if Fig.12 As shown, it is a schematic diagram that a Wi-Fi device can sense at the same time when it is a receiving end. By allocating time and frequency resources to the AP itself, even when the AP receives a communication signal sent by at least one STA, it can still send a perception signal to the target to be measured to perform perception measurement on the target to be measured. In this way, the temporal continuity of the transmission and reception of Wi-Fi perception signals can be improved in a normal communication state, thereby improving the perception performance.

[0109] Regarding the sending of perception signals, there are several implementations:

[0110] In one implementation, after the above trigger frame is sent, the AP may send a perception signal once according to the resource allocation in the trigger frame.

[0111] In another implementation, the trigger frame may also include the number of signals. After the trigger frame is sent, the AP may send a perception signal according to the resource allocation in the trigger frame until the number of signals indicated in the trigger frame is met. By sending multiple perception signals, the perception performance may be improved.

[0112] In another implementation, after the trigger frame is sent, the AP may send a perception signal according to the resource allocation in the trigger frame until a new trigger frame is generated. By sending multiple perception signals, the perception performance may be improved.

[0113] Exemplarily, the sensing signal is a frequency modulated continuous wave signal, which has good detection performance.

[0114] Exemplarily, the above-mentioned perception signal is an OFDM signal. Further, the perception signal may also include first indication information, and the first indication information is used to indicate that the OFDM signal is used for perception. Thus, when at least one STA receives the OFDM signal, it parses and obtains the first indication information, and can learn that the AP has a wireless perception function, so that a perception task request can be sent to the AP. Exemplarily, the first indication information can be located in a reserved bit of the OFDM signal.

[0115] The AP can choose to send corresponding sensing signals based on detection requirements.

[0116] S904: The target to be measured reflects an echo signal to the AP. Correspondingly, the AP receives the echo signal reflected by the target to be measured.

[0117] After receiving the sensing signal, the target to be measured may reflect an echo signal, and the AP may receive the echo signal reflected by the target to be measured.

[0118] After receiving the at least one communication signal and the echo signal, the AP may perform conventional decoding on the at least one communication signal, sense the target to be measured according to the echo signal, and obtain information of the target to be measured, such as distance, speed, etc.

[0119] Furthermore, when the AP acts as a transmitter, it can also send a PPDU to at least one STA. Accordingly, at least one STA receives the PPDU. Unlike a conventional PPDU, the PPDU can also include a third indication information, and the third indication information is used to indicate that the transmitter (i.e., the AP) has a wireless sensing function. Thus, when at least one STA receives the PPDU, it parses the third indication information and can learn that the AP has a wireless sensing function, so that a sensing task request can be sent to the AP. Exemplarily, the third indication information can be located in the reserved bit of the PPDU.

[0120] According to a communication perception method provided in an embodiment of the present application, by receiving at least one communication signal from at least one station and sending a perception signal to a target to be tested, the temporal continuity of the transmission and reception of Wi-Fi perception signals can be improved in a normal communication state, thereby improving the perception performance;

[0121] And by carrying indication information through a trigger frame, a perception signal or a PPDU, it is indicated that the sending end has a wireless perception function, so that the receiving end can request the sending end to assist in perceiving the receiving end.

[0122] The above is an introduction to the method provided in the embodiment of the present application. The following provides a communication perception device for implementing the above method. It can be understood that in order to implement the method, the communication perception device includes a hardware structure and / or software module corresponding to the execution of the method. Those skilled in the art can realize that the present application can be implemented in the form of hardware or software or a combination of hardware and software.

[0123] The communication perception device provided in the embodiment of the present application can be divided into functional modules according to the above method. For example, the functional modules can correspond to each step in the method, or two or more steps can be integrated into one functional module. The above functional modules can be implemented in hardware, software, or a combination of software and hardware. It should be noted that the division of functional modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of each step corresponding to a functional module:

[0124] A possible structural diagram of a communication sensing device is shown in FIG. Fig.13 The communication sensing device 1300 includes a sending unit 1301 and a receiving unit 1302, and may also include a processing unit (not shown in the figure). The sending unit 1301 and the receiving unit 1302 may be independent units or unified transceiver units.

[0125] The sending unit 1301 is used to send a perception signal to the target to be measured on a first time domain resource and a first frequency domain resource; the receiving unit 1302 is used to receive at least one communication signal from at least one site on the first time domain resource and a second frequency domain resource, and the first frequency domain resource and the second frequency domain resource do not overlap; and the receiving unit 1302 is also used to receive an echo signal reflected by the target to be measured.

[0126] Optionally, the processing unit is further used to perform perception measurement on the target to be measured according to the echo signal.

[0127] Optionally, the first time domain resource is configurable to be an integer multiple of a symbol duration.

[0128] Optionally, the perception signal is a frequency modulated continuous wave signal or an OFDM signal.

[0129] Optionally, the perception signal is the OFDM signal, and the perception signal includes first indication information, where the first indication information indicates that the OFDM signal is used for perception.

[0130] Optionally, the sending unit 1301 is further used to send a trigger frame to the at least one site, where the trigger frame includes information about the following resources: the first time domain resources, the first frequency domain resources, and the second frequency domain resources.

[0131] Optionally, the higher the range resolution required for detection, the more the first frequency domain resources are.

[0132] Optionally, the trigger frame includes second indication information, and the second indication information is used to indicate that the sending end has a wireless sensing function.

[0133] Optionally, the sending unit 1301 is further used to send a PPDU to the at least one site, where the PPDU includes third indication information, and the third indication information is used to indicate that the sending end has a wireless sensing function.

[0134] The functions that can be implemented by the communication perception device 1300 can refer to any one of the specific implementation methods in the method embodiments of the present application. The present application does not limit it and will not be repeated here.

[0135] Fig.14 This is a structural diagram of a possible product form of the communication sensing device described in an embodiment of the present application. Fig.14 For Fig.13 An embodiment of the communication-aware device is shown.

[0136] As a possible product form, the communication sensing device 1400 may be an information transmission device / information transmission board. The communication sensing device 1400 includes a processor 1402 and a transceiver 1401. Optionally, the communication sensing device 1400 may also include a memory 1403. The processor 1402 is used to execute Fig.13 The transceiver 1401 is used to perform the method steps performed by the processing unit. Fig.13 The method steps performed by the sending unit 1301 and the receiving unit 1302 in FIG.

[0137] As another possible product form, the communication sensing device 1400 may be a chip. The communication sensing device 1400 includes a processing circuit 1402 and a communication interface 1401. Optionally, the communication sensing device 1400 may also include a storage medium 1403. The processing circuit 1402 is used to execute Fig.13 The communication interface 1401 is used to perform the method steps performed by the processing unit. Fig.13 The method steps performed by the sending unit 1301 and the receiving unit 1302 in FIG.

[0138] As another possible product form of the above embodiment, the communication sensing device can also be implemented using the following: one or more field programmable gate arrays (FPGA), programmable logic devices (PLD), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout this application.

[0139] The above-mentioned processor can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the contents disclosed in this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, and so on. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, Fig.14 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0140] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program instructions can be stored in a computer-readable storage medium. When the program instructions are executed, the steps of the above method embodiment are executed; and the aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or CD-ROM, etc. Various media that can store program codes.

[0141] On the one hand, an embodiment of the present application also provides a readable storage medium, which stores computer execution instructions. When a device (which may be a single-chip microcomputer, chip, controller, etc.) or a processor executes the steps in the communication perception method provided by the present application.

[0142] On the one hand, an embodiment of the present application also provides a computer program product, which includes computer execution instructions, and the computer execution instructions are stored in a computer-readable storage medium; at least one processor of the device can read the computer execution instructions from the computer-readable storage medium, and at least one processor executes the computer execution instructions so that the device executes the steps in the communication perception method provided in the present application.

[0143] On the one hand, an embodiment of the present application also provides a communication perception system, which includes at least one site, a target to be measured, and the above-mentioned communication perception device.

[0144] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0145] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the division of the unit is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The mutual coupling, direct coupling, or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0146] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD), etc.

Claims

1. A communication perception method, characterized in that: The method comprises: Sending a perception signal to a target to be measured on a first time domain resource and a first frequency domain resource, and receiving at least one communication signal from at least one station on the first time domain resource and a second frequency domain resource, wherein the first frequency domain resource does not overlap with the second frequency domain resource; Receive the echo signal reflected by the target to be measured.

2. The method according to claim 1, characterized in that The sensing signal is a frequency modulated continuous wave signal or an orthogonal frequency division multiplexing (OFDM) signal.

3. The method according to claim 2, characterized in that The perception signal is the OFDM signal, and the perception signal includes first indication information, where the first indication information indicates that the OFDM signal is used for perception.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: A trigger frame is sent to the at least one site, where the trigger frame includes information about the following resources: the first time domain resources, the first frequency domain resources, and the second frequency domain resources.

5. The method according to claim 4, characterized in that The higher the detection distance resolution is required, the more first frequency domain resources are required.

6. The method according to claim 4 or 5, characterized in that: The trigger frame includes second indication information, and the second indication information is used to indicate that the sending end has a wireless sensing function.

7. The method according to any one of claims 1 to 6, characterized in that The method further comprises: A physical layer protocol data unit PPDU is sent to the at least one site, where the PPDU includes third indication information, and the third indication information is used to indicate that the sending end has a wireless perception function.

8. A communication sensing device, characterized in that: The device comprises: A sending unit, configured to send a perception signal to a target to be measured on a first time domain resource and a first frequency domain resource, and receive at least one communication signal from at least one station on the first time domain resource and a second frequency domain resource, wherein the first frequency domain resource does not overlap with the second frequency domain resource; The receiving unit is used to receive the echo signal reflected by the target to be measured.

9. The device according to claim 8, characterized in that The sensing signal is a frequency modulated continuous wave signal or an orthogonal frequency division multiplexing (OFDM) signal.

10. The device according to claim 9, characterized in that The perception signal is the OFDM signal, and the perception signal includes first indication information, where the first indication information indicates that the OFDM signal is used for perception.

11. The device according to any one of claims 8 to 10, characterized in that The sending unit is further used to send a trigger frame to the at least one site, where the trigger frame includes information about the following resources: the first time domain resources, the first frequency domain resources, and the second frequency domain resources.

12. The device according to claim 11, characterized in that The higher the distance resolution required for detection, the more first frequency domain resources are needed.

13. The device according to claim 11 or 12, characterized in that The trigger frame includes second indication information, and the second indication information is used to indicate that the sending end has a wireless sensing function.

14. The device according to any one of claims 8 to 13, characterized in that The sending unit is further used to send a physical layer protocol data unit PPDU to the at least one site, where the PPDU includes third indication information, and the third indication information is used to indicate that the sending end has a wireless perception function.

15. A communication sensing device, characterized in that: The invention comprises a processor, wherein the processor is coupled to a memory, and the processor is used to call computer program instructions stored in the memory to execute the method according to any one of claims 1 to 7.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication perception device, the method as described in any one of claims 1 to 7 is implemented.

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