Sensing equipment selection method and device and related equipment

Abstract

The invention discloses a sensing equipment selection method and device and related equipment, and belongs to the technical field of communication, and the method comprises the steps that first equipment obtains at least one measurement value of a first target index, the at least one measurement value is a measurement value obtained by performing first measurement by at least one first node based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted to the first node from the first signal sender through at least one backscattering device; the first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a perceptual operation based on the at least one measured value of the first target indicator.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a method and apparatus for selecting a sensing device and related devices. Background Art

[0002] In a mobile communication network, wireless sensing based on backscatter devices (such as RFID tags or Backscatter tags) can obtain additional information about sensing targets or assist in eliminating non-ideal factors in sensing, thereby enhancing the performance of integrated sensing / communication. In related technologies, a sensing device is randomly selected for wireless sensing during sensing, which results in poor reliability of sensing measurements. Summary of the Invention

[0003] Embodiments of this application provide a method and apparatus for selecting a sensing device and related devices, which can solve the problem of poor reliability of sensing measurements.

[0004] In a first aspect, a method for selecting a sensing device is provided, which is characterized by including:

[0005] A first device obtains at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0006] The first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measurement value of the first target metric.

[0007] In a second aspect, a method for selecting a sensing device is provided, which is characterized by including:

[0008] A first node performs a first measurement based on a first signal sent by at least one first signal sender to obtain at least one measurement value of a first target metric, where the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0009] The first node sends the at least one measurement value of the first target metric to a first device, and the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0010] In a third aspect, a method for selecting a sensing device is provided, which is characterized by including:

[0011] The backscatter device processes the first signal sent by at least one first signal sender based on the first configuration information; the first signal is used to perform a first measurement to obtain at least one measurement value of the first target metric;

[0012] At least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation.

[0013] In a fourth aspect, a sensing device selection apparatus is provided. The first device includes the sensing device selection apparatus, and is characterized by including:

[0014] An acquisition module, configured to acquire at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node performing a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0015] A first determination module, configured to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation based on at least one measurement value of the first target metric.

[0016] In a fifth aspect, a sensing device selection apparatus is provided. The first node includes the sensing device selection apparatus, and is characterized by including:

[0017] An acquisition module, configured to perform a first measurement based on a first signal sent by at least one first signal sender to acquire at least one measurement value of a first target metric, where the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0018] A sending module, configured to send at least one measurement value of the first target metric to the first device, where the at least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation.

[0019] In a sixth aspect, a sensing device selection apparatus is provided. The backscatter device includes the sensing device selection apparatus, and is characterized by including:

[0020] A processing module, configured to process the first signal sent by at least one first signal sender based on the first configuration information; the first signal is used to perform a first measurement to obtain at least one measurement value of the first target metric;

[0021] At least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0022] In a seventh aspect, there is provided a communication device, which is a first device and includes a processor and a communication interface. Wherein, the processor or the communication interface is configured to:

[0023] Obtain at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0024] Based on at least one measurement value of the first target metric, determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0025] In an eighth aspect, there is provided a communication device, which is a first node and includes a processor and a communication interface. Wherein, the processor or the communication interface is configured to:

[0026] Perform a first measurement based on a first signal sent by at least one first signal sender, and obtain at least one measurement value of a first target metric, where the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0027] Send at least one measurement value of the first target metric to the first device, where the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0028] In a ninth aspect, there is provided a communication device, which is a backscatter device and includes a processor and a communication interface. Wherein, the processor or the communication interface is configured to:

[0029] Perform signal processing on a first signal sent by at least one first signal sender based on first configuration information; the first signal is used to perform a first measurement to obtain at least one measurement value of a first target metric;

[0030] At least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0031] In a tenth aspect, a communication device is provided, which includes a processor and a memory. The memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the method described in the first aspect, or the second aspect, or the third aspect are implemented.

[0032] In an eleventh aspect, a sensing device selection system is provided, including: a first device, a first node, and a second device. The first device can be used to execute the steps of the method described in the first aspect. The first node can be used to execute the steps of the method described in the second aspect. The second device can be used to execute the steps of the method described in the third aspect.

[0033] In a twelfth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect are implemented.

[0034] In a thirteenth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect, or to implement the method described in the third aspect.

[0035] In a fourteenth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or the second aspect, or the third aspect.

[0036] In an embodiment of the present application, a first device obtains at least one measurement value of a first target metric. The at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender. The first signal is backscattered from the first signal sender to the first node through at least one backscatter device. The first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measurement value of the first target metric. In this way, by selecting a sensing device for wireless sensing through at least one measurement value of the first target metric obtained by the first measurement, the reliability of the sensing measurement can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

[0038] Figure 2It is a schematic diagram of the backscatter communication technology link;

[0039] Figure 3 It is a schematic diagram of the hardware structure of the backscatter communication technology;

[0040] Figure 4a It is one of the schematic diagrams of the communication and sensing architecture in which a Tag participates in sensing provided by an embodiment of the present application;

[0041] Figure 4b It is the second schematic diagram of the communication and sensing architecture in which a Tag participates in sensing provided by an embodiment of the present application;

[0042] Figure 5 It is one of the flowcharts of a method for selecting a sensing device provided by an embodiment of the present application;

[0043] Figure 6 It is a multipath schematic diagram of the channel response in the first dimension;

[0044] Figure 7 It is the second flowchart of a method for selecting a sensing device provided by an embodiment of the present application;

[0045] Figure 8 It is the third flowchart of a method for selecting a sensing device provided by an embodiment of the present application;

[0046] Figure 9 It is one of the schematic diagrams of the structure of a sensing device selection device provided by an embodiment of the present application;

[0047] Figure 10 It is the second schematic diagram of the structure of a sensing device selection device provided by an embodiment of the present application;

[0048] Figure 11 It is the third schematic diagram of the structure of a sensing device selection device provided by an embodiment of the present application;

[0049] Figure 12 It is the schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0050] Figure 13 It is the schematic diagram of the structure of a terminal provided by an embodiment of the present application;

[0051] Figure 14 It is one of the schematic diagrams of the structure of a network-side device provided by an embodiment of the present application;

[0052] Figure 15 It is the second schematic diagram of the structure of a network-side device provided by an embodiment of the present application. Detailed implementation

[0053] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0054] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0055] The term "indicate" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the recipient of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the recipient determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0056] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only in the above-mentioned systems and radio technologies, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6 th Generation, 6G) communication system.

[0057] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc., which are terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station may be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0058] The core network device may include, but is not limited to, at least one of the following: core network nodes, core network functions, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0059] For ease of understanding, some terms related to the embodiments of this application are explained below:

[0060] 1. Communication and Sensing Integration

[0061] Wireless communication and radar sensing (Communication & Sensing, C&S) have been developing in parallel, but with limited intersection. They have many commonalities in signal processing algorithms, devices, and to some extent, system architectures. In recent years, traditional radar has been evolving towards more general wireless sensing. Wireless sensing can broadly refer to retrieving information from received radio signals. For wireless sensing related to the position of the sensed target, common signal processing methods can be used to estimate dynamic parameters such as the reflection delay, angle of arrival, angle of departure, and Doppler of the target signal; for sensing the physical characteristics of the target, it can be achieved by measuring the inherent signal patterns of the device / object / activity. These two sensing methods can be respectively called sensing parameter estimation and pattern recognition. In this sense, wireless sensing refers to a more general sensing technology and application using radio signals.

[0062] Integrated Sensing and Communication (ISAC) has the potential to integrate wireless sensing into mobile networks, which are referred to here as Perceptive Mobile Networks (PMNs). Perceptive Mobile Networks can provide both communication and wireless sensing services simultaneously, and due to their large broadband coverage and powerful infrastructure, are expected to become an omnipresent wireless sensing solution. Perceptive Mobile Networks can be widely applied to communication and sensing in the fields of transportation, communication, energy, precision agriculture, and security. It can also provide complementary sensing capabilities to existing sensor networks, with unique day-night operation functions and the ability to penetrate fog, leaves, and even solid objects. Some common sensing services are shown in Table 1 below.

[0063] Table 1 Classification of Common Sensing Services

[0064]

[0065]

[0066] 2. Measured Sensing Quantities

[0067] The measured sensing quantities can be classified into the following 4 categories:

[0068] (1) First-level measurement quantities (received signals / original channel information), including: received signal / channel response complex results, amplitude / phase, I / Q channels and their operation results (operations include addition, subtraction, multiplication, division, matrix addition, subtraction, multiplication, matrix transpose, trigonometric relation operations, square root operations, power operations, etc., as well as threshold detection results and maximum / minimum value extraction results of the above operation results; operations also include Fast Fourier Transform (FFT) / Inverse Fast Fourier Transform (IFFT), Discrete Fourier Transform (DFT) / Inverse Discrete Fourier Transform (IDFT), 2D-FFT, 3D-FFT, matched filtering, autocorrelation operations, wavelet transforms, digital filtering, etc., as well as threshold detection results and maximum / minimum value extraction results of the above operation results);

[0069] (2) Second-level measurement quantities (basic measurement quantities), including: time delay, Doppler, angle, intensity, and their multi-dimensional combined representations;

[0070] (3) Third-level measurement quantities (basic attributes / status), including: distance, speed, orientation, spatial position, acceleration;

[0071] (4) Fourth-level measurement quantities (advanced attributes / status), including: whether the target exists, trajectory, action, expression, vital signs, quantity, imaging results, weather, air quality, shape, material, composition.

[0072] The perception measurement result can be the measurement value of the above perception measurement quantity, or the measurement result obtained through further operations (including addition, subtraction, multiplication, division, or according to a certain predetermined function). The perception measurement result can also be the measurement value of at least one of the above perception measurement quantities.

[0073] 3. Second target index

[0074] The second target index can be calculated based on the perception measurement quantity and is used to evaluate the perception performance of the second node for the perception area or perception target, including at least one of the following:

[0075] 1) Statistical mean, standard deviation, or variance of multiple measurement results of the same perception measurement quantity;

[0076] 2) Deviation between the predicted value and the actual measurement value of the perception measurement quantity / perception result, and the statistical mean, standard deviation, or variance of the deviation;

[0077] 3) Ambiguity Function related evaluation metrics, including the Normalized Sidelobe Level (NSL), which is the height of the highest sidelobe of the normalized ambiguity function; or the ratio of the main lobe to the highest sidelobe of the ambiguity function (it can also be the ratio of the highest sidelobe to the main lobe); in addition, it can also include the number of normalized ambiguity function sidelobes / total power / total energy with peak higher than a given threshold, the main lobe width (3dB width) of the ambiguity function, etc.;

[0078] 4) Cramér-Rao Lower Bound (CRLB), which is the lowest variance that all unbiased estimators can achieve and is mathematically equal to the reciprocal of the Fisher information. This evaluation metric is related to the perceived SNR;

[0079] 5) Capacity-Distortion Tradeoff, which quantitatively gives the maximum achievable rate of reliable transmission of the integrated communication and sensing system under a given distortion constraint;

[0080] 6) Equivalent-MSE, which converts the spectral efficiency of communication into an equivalent radar mean square error and is comprehensively calculated in combination with the perceived Cramér-Rao lower bound;

[0081] 7) Estimation-Communication Rate, which regards the sensing channel as a non-cooperative communication channel, and the mutual information between the sensing system and the target is the estimation rate;

[0082] 8) Welch Bound;

[0083] 9) Perceptible reproducible evaluation metrics (such as the sum of Euclidean distances between two consecutive sequence samples, or the alignment path distance in Dynamic Time Warping (DTW), or other metrics that can reflect the similarity between two sequences, including but not limited to: Longest Common Subsequence (LCSS), Edit Distance on Real Sequences (EDR), Edit Distance with Real Penalty (ERP), Hausdorff Distance, Fréchet Distance, One Way Distance (OWD), Locality In-between Polylines (LIP), etc.);

[0084] 10) The calculation result obtained by performing any at least one operation of addition, subtraction, multiplication, and division on any at least two of at least one of the first target metrics, evaluation metrics related to the Ambiguity Function, and metrics such as the Cramér-Rao Lower Bound (CRLB).

[0085] 4. Perceptual QoS

[0086] Perceptual QoS includes at least one of the following: the priority level of integrated sensing / communication services, service type, requirements for perceptual resolution, requirements for perceptual accuracy or perceptual error + requirements for perceptual confidence, perceptual delay budget, requirements for the maximum perceptual range, requirements for perceptual error, requirements for continuous sensing ability, requirements for perceptual update frequency, probability of perceptual service availability, requirements for perceptual signal quality (including requirements based on the first target metrics (see the relevant description of the first target metrics above)), requirements for perceptual security, requirements for perceptual privacy, requirements for detection probability, requirements for false alarm probability, etc.

[0087] 5. Perceptual prior information

[0088] Perceptual prior information includes at least one of the following:

[0089] 1) At least one of the number, size, area, and Radar Cross Section (RCS) of the perceptual target;

[0090] 2) The perceptual service requester, or the location coordinates of the perceptual target provided by the perceptual network element, or the location range of the perceptual target, or the range of the magnitude of the moving speed of the perceptual target and / or the speed direction;

[0091] 3) Size and boundary of the sensing area;

[0092] 4) Sensing area map information and / or obstacle information pre-stored in the network;

[0093] 5) Initial position probability map of the sensing target in the sensing area pre-stored in the network;

[0094] 6) Status information of the sensing nodes, including the position coordinates of the sensing nodes, the orientation of the antenna array of the sensing nodes, and the moving speed of the sensing nodes (including the speed magnitude and speed direction); the sensing nodes include base stations and UEs;

[0095] 7) NR positioning result of the sensing target (when the sensing target is a UE);

[0096] 8) Sensing results of dedicated sensing nodes and / or sensors; the sensing results include the speed, distance, material, shape, 2D / 3D image, position coordinates, motion trajectory, and micro-Doppler information of the sensing target;

[0097] 9) Channel information between the sensing transmitter and the sensing receiver, including channel impulse response / transfer function, channel maximum delay, channel root mean square delay spread, channel coherence bandwidth, channel maximum Doppler shift, channel root mean square Doppler spread, channel Rice K factor, and other channel parameters.

[0098] 6. Second configuration information

[0099] That is, parameter configuration information related to sensing. The parameter configuration information related to sensing includes at least one of the following:

[0100] Waveform type, such as Single-tone, Orthogonal Frequency Division Multiplexing (OFDM), Single-carrier Frequency-Division Multiple Access (SC-FDMA), OTFS, Frequency Modulated Continuous Wave FMCW, pulse signal, etc.;

[0101] Subcarrier spacing: For example, the subcarrier spacing of the OFDM system is 30KHz;

[0102] Guard interval: The time interval between the end of the signal transmission time and the time when the latest echo signal of the signal is received; this parameter is proportional to the maximum sensing distance; for example, it can be calculated by 2dmax / c, where dmax is the maximum sensing distance (belonging to the sensing requirement). For example, for a self-transmitting and self-receiving sensing signal, dmax represents the maximum distance from the sensing signal transceiver point to the signal transmitting point; in some cases, the cyclic prefix CP of the OFDM signal can act as the minimum guard interval.

[0103] Bandwidth: This parameter is inversely proportional to the range resolution and can be obtained by c / 2 / delta_d, where delta_d is the range resolution (belonging to the sensing requirement); c is the speed of light.

[0104] Burst duration: This parameter is inversely proportional to the rate resolution (belonging to the sensing requirement). This parameter is the time span of the sensing signal, mainly for calculating the Doppler frequency shift; this parameter can be calculated by c / 2 / delta_v / fc; where delta_v is the velocity resolution; fc is the carrier frequency of the sensing signal.

[0105] Time domain interval: This parameter can be calculated by c / 2 / fc / v_range; where v_range is the maximum rate minus the minimum speed (belonging to the sensing requirement); this parameter is the time interval between two adjacent sensing signals.

[0106] Transmitted signal power, for example, taking values every 2 dBm from -20 dBm to 23 dBm.

[0107] Signal format, such as Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), Positioning Reference Signal (PRS), etc., or other predefined signals, as well as related sequence format information.

[0108] Signal direction; for example, the direction of the sensing signal or beam information.

[0109] Time resource, such as the time slot index or symbol index of the time slot where the sensing signal is located; among them, time resources are divided into two types. One is a one-time time resource, such as sending an omnidirectional sensing signal in one symbol. The other is a non-one-time time resource, such as multiple groups of periodic time resources or discontinuous time resources (which can include start time and end time). Each group of periodic time resources sends sensing signals in the same direction, and the beam directions on different groups of periodic time resources are different.

[0110] Frequency resources, including the center frequency point of the sensing signal, bandwidth, resource block (RB) or subcarrier, point A, starting bandwidth position, etc.;

[0111] Quasi co-location (QCL) relationships. For example, the sensing signal includes multiple resources, and each resource has a QCL with a synchronization signal block (SSB). The QCL includes type A, B, C, or D;

[0112] Antenna configuration information.

[0113] Among them, the antenna configuration information includes:

[0114] The antenna element ID or antenna port ID used for transmitting and / or receiving the sensing signal;

[0115] The panel ID + element ID used for transmitting and / or receiving the sensing signal;

[0116] The position information of the antenna element used for transmitting and / or receiving the sensing signal relative to a local reference point on the antenna array (which can be represented by Cartesian coordinates (x, y, z) or spherical coordinates ( ));

[0117] The position information of the panel used for transmitting and / or receiving the sensing signal relative to a local reference point on the antenna array (which can be represented by Cartesian coordinates (x, y, z) or spherical coordinates ( ), and the position information of the antenna element used for transmitting the sensing signal within these selected panels relative to a unified reference point of the panel (such as the center point of the panel) (which can be represented by Cartesian coordinates (x, y, z) or spherical coordinates ( ));

[0118] The bitmap information of the antenna elements. For example: this bitmap uses "1" to indicate that the element is selected for transmitting and / or receiving the sensing signal, and "0" to indicate that the element is not selected; or uses "0" to indicate that the element is selected and "1" to indicate that the element is not selected;

[0119] The bitmap information of the array panel and the bitmap information of the elements within the selected panels. For example: this bitmap uses "1" to indicate that the element is selected for transmitting and / or receiving the sensing signal, and "0" to indicate that the element is not selected; or uses "0" to indicate that the element is selected and "1" to indicate that the element is not selected.

[0120] 7. Low-power backscatter communication technology

[0121] The point-to-point backscatter (BSC) technology has been widely used in radio frequency identification (RFID) applications. Passive RFID tags can report their IDs to a reader that interrogates in the near field (usually a few centimeters to one meter). In the early stage, the Internet of Things (IoT) mainly consisted of RFID devices for logistics and inventory management. However, the future 6G IoT is expected to connect tens of billions of devices, complete more complex and multifunctional tasks, and have a global impact. This requires the communication capabilities and range (tens of meters) between IoT nodes to far exceed that of the original RFID, which only supports burst and low-rate (only transmitting a pre-written ID sequence of several bytes) within a few meters. The communication distance of traditional RFID is in the order of meters, while the communication distance of the next-generation BSC is generally expected to reach the order of kilometers; traditional RFID uses binary modulation, and the communication rate is generally no more than 640 Kbps; the next-generation BSC can use higher-order modulation, and the communication rate can reach at least 10 Mbps, or even 2 Gbps. Based on the existing BSC theory, by using advanced communication technologies such as small cell networks, full duplex, multi-antenna communication, massive access, and wireless power transfer, as well as the manufacturing of micro radios (such as button-sized radios) and low-power electronic devices, the above goals can be achieved.

[0122] Backscatter communication refers to the backscatter communication device using radio frequency signals in other devices or the environment for signal modulation to transmit its own information. The backscatter communication device can be:

[0123] (1) The backscatter communication device in traditional RFID is generally a tag, which belongs to a passive Internet of Things (IoT) device (Passive-IoT);

[0124] (2) A semi-passive tag, which has a certain amplification ability for downlink reception or uplink reflection;

[0125] (3) A tag with the ability to actively transmit (Active tag), and such a terminal can send information to a reader without relying on the reflection of the incident signal.

[0126] As Figure 2 shown, a simple implementation is that when the tag needs to send '1', the tag reflects the incident carrier signal, and when the tag needs to send '0', it does not reflect.

[0127] As Figure 3As shown, the backscatter communication device controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient of the signal can be characterized as:

[0128]

[0129] where Z0 is the antenna characteristic impedance and Z1 is the load impedance. Assuming the incident signal is S in (t), the output signal is Therefore, corresponding amplitude modulation, frequency modulation, or phase modulation can be achieved by reasonably controlling the reflection coefficient.

[0130] 8. Sensing / Communication Integration Based on Backscatter Tags

[0131] Communication integration can give rise to a series of new 6G applications. In addition to the several typical sensing use cases listed in Table 1, communication integration based on low-power communication devices will also become an important application scenario for 6G. Wireless sensing based on Radio Frequency Identification (RFID) and Backscatter Communications technology can obtain additional information about the sensing target, assist in eliminating non-ideal factors in sensing, and further enhance the performance of sensing / communication integration. Due to the advantages of low cost, low power consumption, and being conducive to large-scale deployment of RFID and backscatter, sensing and communication integration based on RFID / backscatter are expected to be widely used in 6G.

[0132] In a mobile communication network, a base station (including one or more Transmission Reception Points (TRPs) on the base station) and a User Equipment (UE) (including one or more sub-arrays / panels (Panels) on the UE) can serve as sensing nodes participating in integrated sensing / communication services. Typical UEs include mobile phone terminals, portable tablet computers, etc. By sending and receiving a first signal between nodes, it is possible to sense a certain area or a certain entity target. The first signal can be a signal that does not contain transmission information, such as existing LTE / NR synchronization and reference signals, including Synchronization Signal and PBCH block (SSB) signals, Channel State Information-Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS), Phase Tracking Reference Signal (PTRS), etc.; it can also be a single-frequency continuous wave (CW), frequency-modulated continuous wave (FMCW), and ultra-wideband Gaussian pulse commonly used in radar; it can also be a newly designed dedicated signal with good correlation characteristics and low peak-to-average power ratio, or a newly designed integrated sensing / communication signal that not only carries certain information but also has good sensing performance. For example, the new signal is formed by splicing / combining / superimposing at least one dedicated sensing signal / reference signal and at least one communication signal in the time domain and / or frequency domain.

[0133] A node that sends and / or receives sensing signals is called a node participating in sensing (or a sensing node). The sensing node can be a base station or a UE. The device for determining the sensing node after handover and the sensing method of the sensing node after handover can be a base station, a UE, or a device in the core network, such as a Sensing Function (SF), an Access and Mobility Management Function (AMF), a sensing application server in the core network, etc. Hereinafter, the devices in the above-mentioned core network are uniformly referred to as first devices.

[0134] In wireless sensing involving tags, the tags may be coupled to the sensing target, i.e., the tags may be installed on the sensing target; or the tags may be decoupled from the sensing target, i.e., the tags are deployed in the environment around the sensing target. During the sensing process, the sensing node receives at least a part of the first signals reflected / scattered by the tags participating in the sensing and obtains the measured values of the sensing measurement quantities / sensing results. The number of tags participating in the sensing can be greater than 1. Hereinafter, the tags participating in the sensing are uniformly referred to as the second devices. The second device may be composed of at least one tag participating in the sensing. Figure 4a and Figure 4b Several communication and sensing architectures in which tags participate in sensing are given. Only one tag is taken as an example in Figure 4a and Figure 4b for illustration.

[0135] Next, with reference to the accompanying drawings, the sensing device selection method, apparatus, and communication device provided by the embodiments of the present application will be described in detail through some embodiments and their application scenarios.

[0136] Refer to Figure 5 , Figure 5 which is a flowchart of a sensing device selection method provided by an embodiment of the present application. As shown in Figure 5 , the sensing device selection method includes the following steps:

[0137] Step 101: The first device obtains at least one measured value of a first target metric, where the at least one measured value is a measured value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0138] Step 102: The first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measured value of the first target metric.

[0139] Among them, during the first measurement, the first signal sender sending the first signal can be the first node or a node other than the first node, such as the second node.

[0140] It should be noted that the first measurement can be performed during the sensing operation, and at least one of the first signal sender, the first signal receiver, and the target backscatter device determined based on the at least one measured value of the first target metric can be used for subsequent execution of the sensing operation.

[0141] In one implementation, the execution of the sensing operation may include at least one of the following:

[0142] The first signal sender sends a first signal;

[0143] The first signal receiver measures the first signal sent by the first signal sender to obtain a sensing measurement quantity;

[0144] Among them, the first signal is backscattered from the first signal sender to the first signal receiver via the target backscatter device. The first signal is a signal for sensing, such as a reference signal, etc.

[0145] In one implementation, the first signal sender for performing the sensing operation can be a node selected from the at least one first signal sender; the target backscatter device can be a backscatter device selected from the at least one backscatter device; the first signal receiver for performing the sensing operation can be a node selected from the at least one first node.

[0146] In one implementation, the first target metric may include at least one of the following:

[0147] Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

[0148] The measured value of the first target metric can be the measured value of the metric related to received power obtained by performing a first measurement on the first signals sent by at least one first signal sender; or, the measured value of the metric related to interference or noise power obtained by performing a first measurement on the first signals sent by at least one first signal sender; or, the measured value of the metric related to both received power and interference or noise power obtained by performing a first measurement on the first signals sent by at least one first signal sender.

[0149] Among them, determining at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation based on at least one measurement value of the first target metric may include determining a first node with a measurement value of the first target metric greater than a first preset threshold as the first signal receiver for performing the sensing operation, or determining a first signal sender with a measurement value of the first target metric greater than the first preset threshold as the first signal sender for performing the sensing operation, or determining a backscatter device with a measurement value of the first target metric greater than the first preset threshold as the target backscatter device; or, it may include determining a first node with a measurement value of the first target metric less than or equal to a second preset threshold as the first signal receiver for performing the sensing operation, or determining a first signal sender with a measurement value of the first target metric less than or equal to the second preset threshold as the first signal sender for performing the sensing operation, or determining a backscatter device with a measurement value of the first target metric less than or equal to the second preset threshold as the target backscatter device; or, it may include determining the first node with the first N measurement values of the first target metric sorted from largest to smallest as the first signal receiver for performing the sensing operation, or determining the first signal sender with the first N measurement values of the first target metric sorted from largest to smallest as the first signal sender for performing the sensing operation, or determining the backscatter device with the first N measurement values of the first target metric sorted from largest to smallest as the target backscatter device, where N is greater than or equal to 1; or, determining the first node with the last N measurement values of the first target metric sorted from largest to smallest as the first signal receiver for performing the sensing operation, or determining the first signal sender with the last N measurement values of the first target metric sorted from largest to smallest as the first signal sender for performing the sensing operation, or determining the backscatter device with the last N measurement values of the first target metric sorted from largest to smallest as the target backscatter device; this embodiment does not limit this.

[0150] Optionally, the tag of the backscatter device may be coupled to the sensing target or may be deployed in the environment around the sensing target and decoupled from the sensing target. Optionally, the sensing tag may be equipped with sensing sensors (including, for example, optical, acoustic, mechanical, humidity, gas, etc. sensors such as cameras, microphones, gyroscopes, thermometers, barometers, hygrometers, infrared detectors, etc.), and the measurement information obtained by the sensing sensors is backscattered by modulating the first signal and finally received by the second node; optionally, the sensing tag does not have sensing sensors, and the change in the sensed measurement quantity is reflected by the impedance change of the tag and finally appears as a change in the frequency, amplitude, or phase of the first signal at the receiving end.

[0151] In an embodiment of the present application, a first device obtains at least one measurement value of a first target metric. The at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender. The first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device. The first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measurement value of the first target metric. In this way, by selecting a sensing device for wireless sensing through at least one measurement value of the first target metric obtained by the first measurement, the reliability of the sensing measurement can be improved.

[0152] Optionally, before the first device obtains at least one measurement value of the first target metric, the method further includes:

[0153] The first device determines first configuration information for configuring the first measurement.

[0154] The first device sends the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node.

[0155] In this embodiment, the first device determines first configuration information for configuring the first measurement. The first device sends the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node. Thus, the backscatter device can assist in performing the first measurement based on the first configuration information, and the first node can obtain information related to the backscatter device assisting the first measurement based on the first configuration information, facilitating the first node to perform the first measurement.

[0156] Optionally, the first configuration information includes at least one of the following:

[0157] The modulation type of the backscatter device; the spreading factor, modulation rate, or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources of the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0158] Among them, the modulation type may include ASK (including OOK), FSK, Minimum Shift Keying (MSK), Continuous Phase Frequency Shift Keying (CP-FSK), PSK, Offset Quadrature Phase Shift Keying (O-QPSK), Differential Binary Phase Shift Keying (DBPSK), etc.

[0159] The spreading sequence of the second device may include a ZC sequence, a Gold sequence, etc.

[0160] The capability information of the second device for the first measurement may be used to indicate: whether to use an LNA or not.

[0161] The manner in which the second device performs the first measurement may include: measuring the RSRP, or measuring the RSSI.

[0162] Optionally, the first device determines first configuration information, including:

[0163] The first device determines the first configuration information or the second configuration information based on at least one of the first information, the second information, the third information, and the fourth information;

[0164] Among them, the first information includes at least one of the following:

[0165] Backscatter device identifiers within the sensing area; backscatter device identifiers of the sensing target; the number of backscatter devices within the sensing area; the number of backscatter devices of the sensing target; status information of the backscatter device; sensing capability information of the backscatter device; encryption algorithm type of the backscatter device; channel coding related information of the backscatter device;

[0166] The second information includes at least one of the following:

[0167] Available resource information of the first node; hardware related information of the first node; detection capability indication information of the first node; status information of the first node or the first node;

[0168] The third information includes at least one of the following:

[0169] Measurement value of the first target metric; measurement value of the sensing measurement quantity; sensing result; measurement value of the second target metric;

[0170] The fourth information includes at least one of the following:

[0171] Perceived Quality of Service (QoS); communication QoS; perceived prior information.

[0172] Among them, the status information of the backscatter device may include at least one of the following: the position information of the backscatter device (such as two-dimensional position information or three-dimensional position information, including the Cartesian coordinates or polar coordinates of the backscatter device and the origin of the reference system), the velocity information of the backscatter device (magnitude and direction), and the antenna orientation information of the backscatter device.

[0173] Among them, the information related to the channel coding of the backscatter device may include the type of channel coding FEC and the corresponding coding rate.

[0174] In one implementation, the first device may further determine second configuration information for configuring the first measurement.

[0175] The first device sends the second configuration information to the at least one backscatter device; or the first device sends the second configuration information to the at least one first node.

[0176] In one implementation, the first device determines the second configuration information based on at least one of the first information, the second information, the third information, and the fourth information.

[0177] Optionally, the first device obtains at least one measurement value of the first target metric, including:

[0178] The first device receives at least one measurement value of the first target metric sent by at least one first node.

[0179] Optionally, the first target metric includes at least one of the following:

[0180] Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

[0181] Optionally,

[0182] The metrics related to the received power include at least one of the following:

[0183] The first metric; the second metric; the third metric;

[0184] Or,

[0185] The metrics related to the interference or noise power include at least one of the following:

[0186] The fourth metric; the fifth metric; the sixth metric; the seventh metric; the eighth metric; the ninth metric; the tenth metric; the eleventh metric; the twelfth metric; the thirteenth metric; the fourteenth metric; the fifteenth metric; the sixteenth metric; the seventeenth metric; the eighteenth metric; the nineteenth metric; the twentieth metric;

[0187] Or

[0188] The metrics related to both the received power and the interference or noise power include at least one of the following:

[0189] The twenty - first metric; the twenty - second metric; the twenty - third metric; the twenty - fourth metric; the twenty - fifth metric; the twenty - sixth metric; the twenty - seventh metric; the twenty - eighth metric; the twenty - ninth metric; the thirtieth metric; the thirty - first metric; the thirty - second metric; the thirty - third metric; the thirty - fourth metric; the thirty - fifth metric; the thirty - sixth metric; the thirty - seventh metric; the thirty - eighth metric; the thirty - ninth metric; the fortieth metric; the forty - first metric;

[0190] Among them, the first metric is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal;

[0191] The second metric is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal;

[0192] The third metric is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0193] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0194] The fourth metric is determined based on the difference between the first total received power and the first metric;

[0195] The fifth metric is determined based on the difference between the second total received power and the second metric;

[0196] The sixth metric is determined based on the difference between the third total received power and the third metric;

[0197] The seventh metric is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first metric and the second metric;

[0198] The eighth metric is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second metric and the third metric;

[0199] The ninth metric is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first metric and the third metric;

[0200] The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, and the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0201] The eleventh indicator is determined based on the difference between the first total received power and the first target signal received power;

[0202] The twelfth indicator is determined based on the difference between the second total received power and the second target signal received power;

[0203] The thirteenth indicator is determined based on the difference between the third total received power and the third target signal received power;

[0204] The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, and the fifth intermediate quantity is the sum of the first target signal received power and the second target signal received power;

[0205] The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, and the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power;

[0206] The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, and the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0207] The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, and the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0208] The eighteenth indicator is determined based on the difference between the first target signal received power and the first indicator;

[0209] The nineteenth indicator is determined based on the difference between the second target signal received power and the second indicator;

[0210] The twentieth indicator is determined based on the difference between the third target signal received power and the third indicator;

[0211] The twenty-first indicator is determined based on the quotient of the first indicator and the fourth indicator;

[0212] The twenty-second indicator is determined based on the quotient of the first indicator and the eleventh indicator;

[0213] The twenty-third indicator is determined based on the quotient of the first indicator and the eighteenth indicator;

[0214] The twenty-fourth indicator is determined based on the quotient of the second indicator and the fifth indicator;

[0215] The twenty-fifth index is determined based on the quotient of the second index and the twelfth index;

[0216] The twenty-sixth index is determined based on the quotient of the second index and the nineteenth index;

[0217] The twenty-seventh index is determined based on the quotient of the third index and the sixth index;

[0218] The twenty-eighth index is determined based on the quotient of the third index and the thirteenth index;

[0219] The twenty-ninth index is determined based on the quotient of the third index and the twentieth index;

[0220] The thirtieth index is determined based on the sum of the product of the first coefficient and the twenty-first index, the product of the second coefficient and the twenty-fourth index, and the product of the third coefficient and the twenty-seventh index;

[0221] The thirty-first index is determined based on the sum of the product of the fourth coefficient and the twenty-second index, the product of the fifth coefficient and the twenty-fifth index, and the product of the sixth coefficient and the twenty-eighth index;

[0222] The thirty-second index is determined based on the sum of the product of the seventh coefficient and the twenty-third index, the product of the eighth coefficient and the twenty-sixth index, and the product of the ninth coefficient and the twenty-ninth index;

[0223] The thirty-third index is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity. The ninth intermediate quantity is the quotient of the first index and the tenth index, the tenth intermediate quantity is the quotient of the second index and the tenth index, and the eleventh intermediate quantity is the quotient of the third index and the tenth index;

[0224] The thirty-fourth index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the seventeenth index, the thirteenth intermediate quantity is the quotient of the second index and the seventeenth index, and the fourteenth intermediate quantity is the quotient of the third index and the seventeenth index;

[0225] The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index, and the sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0226] The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index, and the eighteenth intermediate quantity is the quotient of the third index and the eighth index.

[0227] The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index, and the twentieth intermediate quantity is the quotient of the third index and the ninth index.

[0228] The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index, and the twenty-second intermediate quantity is the quotient of the second index and the fourteenth index.

[0229] The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index, and the twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index.

[0230] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index.

[0231] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0232] Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal.

[0233] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal.

[0234] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal.

[0235] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource units carrying the first target signal and the time-frequency domain resource units carrying the second target signal;

[0236] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource units carrying the second target signal and the time-frequency domain resource units carrying the third target signal;

[0237] The sixth total received power is the linear average of the total received power on the sixth target resource, and the sixth target resource includes the time-frequency domain resource units carrying the first target signal and the time-frequency domain resource units carrying the third target signal;

[0238] The seventh total received power is the linear average of the total received power on the seventh target resource, and the seventh target resource includes the time-frequency domain resource units carrying the first target signal, the time-frequency domain resource units carrying the second target signal, and the time-frequency domain resource units carrying the third target signal;

[0239] Wherein, the first target signal is the first signal;

[0240] Or,

[0241] The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path;

[0242] Or,

[0243] The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0244] Wherein, the first target path can be a path only associated with the sensing target, the second target path can be a path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path can be a path only associated with the backscatter device performing the sensing operation.

[0245] In one implementation, the first metric is the linear average of the received power of the first target path in the channel response measured for the first target signal on the resource units carrying the first target signal;

[0246] The second metric is the linear average of the received power of the second target path in the channel response measured for the second target signal on the resource units carrying the second target signal;

[0247] The third indicator is the linear average of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0248] The fourth indicator is the difference between the first total received power and the first indicator;

[0249] The fifth indicator is the difference between the second total received power and the second indicator;

[0250] The sixth indicator is the difference between the third total received power and the third indicator;

[0251] The seventh indicator is the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator;

[0252] The eighth indicator is the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator;

[0253] The ninth indicator is the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator;

[0254] The tenth indicator is the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0255] The eleventh indicator is the difference between the first total received power and the received power of the first target signal;

[0256] The twelfth indicator is the difference between the second total received power and the received power of the second target signal;

[0257] The thirteenth indicator is the difference between the third total received power and the received power of the third target signal;

[0258] The fourteenth indicator is the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the received power of the first target signal and the received power of the second target signal;

[0259] The fifteenth indicator is the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the received power of the second target signal and the received power of the third target signal;

[0260] The sixteenth indicator is the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the received power of the first target signal and the received power of the third target signal;

[0261] The seventeenth index is the difference between the seventh total received power and the eighth intermediate quantity, and the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0262] The eighteenth index is the difference between the first target signal received power and the first index;

[0263] The nineteenth index is the difference between the second target signal received power and the second index;

[0264] The twentieth index is the difference between the third target signal received power and the third index;

[0265] The twenty - first index is the quotient of the first index and the fourth index;

[0266] The twenty - second index is the quotient of the first index and the eleventh index;

[0267] The twenty - third index is the quotient of the first index and the eighteenth index;

[0268] The twenty - fourth index is the quotient of the second index and the fifth index;

[0269] The twenty - fifth index is the quotient of the second index and the twelfth index;

[0270] The twenty - sixth index is the quotient of the second index and the nineteenth index;

[0271] The twenty - seventh index is the quotient of the third index and the sixth index;

[0272] The twenty - eighth index is the quotient of the third index and the thirteenth index;

[0273] The twenty - ninth index is the quotient of the third index and the twentieth index;

[0274] The thirtieth index is the sum of the product of the first coefficient and the twenty - first index, the product of the second coefficient and the twenty - fourth index, and the product of the third coefficient and the twenty - seventh index;

[0275] The thirty - first index is the sum of the product of the fourth coefficient and the twenty - second index, the product of the fifth coefficient and the twenty - fifth index, and the product of the sixth coefficient and the twenty - eighth index;

[0276] The thirty - second index is the sum of the product of the seventh coefficient and the twenty - third index, the product of the eighth coefficient and the twenty - sixth index, and the product of the ninth coefficient and the twenty - ninth index;

[0277] The thirty-third index is the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity. The ninth intermediate quantity is the quotient of the first index and the tenth index. The tenth intermediate quantity is the quotient of the second index and the tenth index. The eleventh intermediate quantity is the quotient of the third index and the tenth index;

[0278] The thirty-fourth index is the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the seventeenth index. The thirteenth intermediate quantity is the quotient of the second index and the seventeenth index. The fourteenth intermediate quantity is the quotient of the third index and the seventeenth index;

[0279] The thirty-fifth index is the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index. The sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0280] The thirty-sixth index is the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index. The eighteenth intermediate quantity is the quotient of the third index and the eighth index;

[0281] The thirty-seventh index is the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index. The twentieth intermediate quantity is the quotient of the third index and the ninth index;

[0282] The thirty-eighth index is the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index. The twenty-second intermediate quantity is the quotient of the second index and the fourteenth index;

[0283] The thirty-ninth index is the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index. The twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index;

[0284] The fortieth index is the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index. The twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index;

[0285] The forty-first index is the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index. The twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index. The twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0286] In one implementation, taking the backscatter device as the tag, the first signal sender as node A, and the first node as node A / B as an example, the multipath classification is as follows:

[0287] (1) The first target path: The path only associated with the sensing target;

[0288] (2) The second target path: The path simultaneously associated with the sensing target and the tag participating in the sensing. It includes the following propagation paths:

[0289] Node A -> Sensing target -> Tag -> Node A / B;

[0290] Node A -> Tag -> Sensing target -> Node A / B;

[0291] Node A -> Tag 1 -> Sensing target -> Tag 2 -> Node A / B;

[0292] Active tag -> Sensing target -> Node B;

[0293] (3) The third target path: The path only associated with the tag participating in the sensing; that is:

[0294] Node A -> Tag -> Node A / B;

[0295] Active tag -> Node B;

[0296] (4) The fourth interference path: Other multipaths between node A and node B (or node A), or between the Active tag and node B, excluding the first, second, and third target paths. It includes at least one of the following:

[0297] Paths not associated with the sensing target and the tag;

[0298] Paths that are associated with the sensing target and / or the tag but also pass through the reflections of other unknown reflectors;

[0299] Reflected paths emitted from the Active tag and passing through other unknown reflectors.

[0300] Regarding the first target metric, the first target metric refers to a sensing-related metric measured by a receiving device such as a base station / UE in integrated sensing and communication based on backscatter tags (tags), including at least one of the following three categories:

[0301] The first category: metrics related to received power, including at least one of the following metrics:

[0302] (1) The first metric (received power of the first target path): the linear average (in watts) of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal. The resource unit is a time-domain and / or frequency-domain resource unit; the first target signal can be: a sensing signal such as a dedicated signal for sensing services, or a communication signal such as a reference signal, a synchronization signal, etc.

[0303] (2) The second metric (received power of the second target path): the linear average (in watts) of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal. The second target signal is the signal after the first target signal propagates through the second target path. Among them, for any at least one tag on the propagation path of the second target path:

[0304] In the case of the tag reflecting the signal, it can be that the tag frequency-shifts the first target signal and then reflects it; it can also be a direct total reflection of the first target signal. In the case where all tags on the propagation path of the second target path are total reflections, the resource unit carrying the second target signal is the same as the resource unit carrying the first target signal;

[0305] In the case of the tag transmitting a signal (i.e., the tag is an active tag), the second target signal is sent by the tag.

[0306] Among them, the resource unit of the second target signal can be the same as that of the first target signal (for example, when the tag transmits fully), or different (for example, when the tag frequency-shifts).

[0307] (3) The third metric (received power of the third target path): the linear average (in watts) of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal. The third target signal is the signal after the first target signal propagates through the third target path. Among them, for any at least one tag on the propagation path of the third target path:

[0308] In the case of the tag reflecting the signal, the tag may shift the frequency of the first target signal and then reflect it, or directly perform total reflection on the first target signal; in the case where all tags on the third target path propagation path perform total reflection, the resource unit carrying the third target signal is the same as the resource unit carrying the first target signal;

[0309] In the case of the tag transmitting the signal, the third target signal is transmitted by the tag.

[0310] Category 2: Indicators related to interference and noise power, including at least one of the following indicators:

[0311] (1) Fourth indicator: That is, the linear average of the power of the other paths except the first target path in the channel response of the first target signal on the first target resource, and the linear average of the interference and noise power of the other signals other than the first target signal on the first target resource (unit: W); among them, the first target resource is the time-frequency domain resource unit carrying the first target signal;

[0312] Fourth indicator = First total received power - First indicator; among them, the first total received power can be expressed as: the linear average of the total received power on the first target resource (including the received power of the signals of the serving cell and non-serving cells, adjacent channel interference, and thermal noise, etc.) (unit: W); or, First total received power = RSSI * K1, K1 is a coefficient, the measurement resource of RSSI is the first target resource or other resources (such as the resources configured by high-layer signaling), and the definition of RSSI is the same as that in 3GPP TS38.215.

[0313] (2) Fifth indicator: That is, the linear average of the power of the other paths except the second target path in the channel response of the second target signal on the second target resource, and the linear average of the interference and noise power of the other signals other than the second target signal on the second target resource (unit: W);

[0314] Fifth indicator = Second total received power - Second indicator.

[0315] (3) Sixth indicator: That is, the linear average of the power of the other paths except the third target path in the channel response of the third target signal on the third target resource, and the linear average of the interference and noise power of the other signals other than the third target signal on the third target resource (unit: W);

[0316] Sixth indicator = Third total received power - Third indicator.

[0317] (4) The seventh metric: that is, the linear average of the power of the first interfering path on the fourth target resource, and the sum of the linear average of the interference and noise power of other signals on the fourth target resource other than the first target signal and the second target signal (unit: W); where the fourth target resource is the set of time-frequency domain resource units carrying the first target signal and the time-frequency domain resource units carrying the second target signal; the first interfering path is other multipaths other than the first target path and the second target path;

[0318] The seventh metric = the fourth total received power - the first metric - the second metric.

[0319] (5) The eighth metric: that is, the linear average of the power of the second interfering path on the fifth target resource, and the sum of the linear average of the interference and noise power of other signals on the fifth target resource other than the second target signal and the third target signal (unit: W); where the fifth target resource is the set of time-frequency domain resource units carrying the second target signal and the time-frequency domain resource units carrying the third target signal; the second interfering path is other multipaths other than the second target path and the third target path;

[0320] The eighth metric = the fifth total received power - the second metric - the third metric;

[0321] (6) The ninth metric: that is, the linear average of the power of the third interfering path on the sixth target resource, and the sum of the linear average of the interference and noise power of other signals on the sixth target resource other than the first target signal and the third target signal (unit: W); where the sixth target resource is the set of time-frequency domain resource units carrying the first target signal and the time-frequency domain resource units carrying the third target signal; the third interfering path is other multipaths other than the first target path and the third target path;

[0322] The ninth metric = the sixth total received power - the first metric - the third metric.

[0323] (7) The tenth metric: that is, the linear average of the power of the fourth interfering path on the seventh target resource, and the sum of the linear average of the interference and noise power of other signals on the seventh target resource other than the first target signal, the second target signal, and the third target signal (unit: W); where the seventh target resource is the set of time-frequency domain resource units carrying the first target signal, the time-frequency domain resource units carrying the second target signal, and the time-frequency domain resource units carrying the third target signal; the fourth interfering path is other multipaths other than the first target path, the second target path, and the third target path;

[0324] The tenth metric = the seventh total received power - the first metric - the second metric - the third metric.

[0325] (8) Eleventh Index: That is, the linear average value of the interference and noise power of signals other than the first target signal on the first target resource (unit: W);

[0326] Eleventh Index = First Total Received Power - First Target Signal Received Power; where the First Target Signal Received Power is the RSRP of the first target signal (the definition of RSRP is the same as in TS38.215).

[0327] (9) Twelfth Index: That is, the linear average value of the interference and noise power of signals other than the second target signal on the second target resource (unit: W);

[0328] Twelfth Index = Second Total Received Power - Second Target Signal RSRP;

[0329] (10) Thirteenth Index: That is, the linear average value of the interference and noise power of signals other than the third target signal on the third target resource (unit: W);

[0330] Thirteenth Index = Third Total Received Power - Third Target Signal RSRP.

[0331] (11) Fourteenth Index: That is, the linear average value of the interference and noise power of signals other than the first target signal and the second target signal on the fourth target resource (unit: W);

[0332] Fourteenth Index = Fourth Total Received Power - First Target Signal RSRP - Second Target Signal RSRP;

[0333] (12) Fifteenth Index: That is, the linear average value of the interference and noise power of signals other than the second target signal and the third target signal on the fifth target resource (unit: W);

[0334] Fifteenth Index = Fifth Total Received Power - Second Target Signal RSRP - Third Target Signal RSRP;

[0335] (13) Sixteenth Index: That is, the linear average value of the interference and noise power of signals other than the first target signal and the third target signal on the sixth target resource (unit: W);

[0336] Sixteenth Index = Sixth Total Received Power - First Target Signal RSRP - Third Target Signal RSRP;

[0337] (14) Seventeenth Index: That is, the linear average value of the interference and noise power of signals other than the first target signal, the second target signal, and the third target signal on the seventh target resource (unit: W);

[0338] The seventeenth metric = the seventh total received power - the RSRP of the first target signal - the RSRP of the second target signal - the RSRP of the third target signal;

[0339] (15) The eighteenth metric: That is, the linear average value of the power of the paths other than the first target path in the channel response of the first target signal on the first target resource (unit: W);

[0340] The eighteenth metric = the RSRP of the first target signal - the first metric;

[0341] (16) The nineteenth metric: That is, the linear average value of the power of the paths other than the second target path in the channel response of the second target signal on the second target resource (unit: W);

[0342] The nineteenth metric = the RSRP of the second target signal - the second metric;

[0343] (17) The twentieth metric: That is, the linear average value of the power of the paths other than the third target path in the channel response of the third target signal on the third target resource (unit: W);

[0344] The twentieth metric = the RSRP of the third target signal - the third metric.

[0345] Category III: Several metrics related to received power, interference, or noise power, including at least one of the following metrics:

[0346] Type I: Used to evaluate the quality (SINR / SNR / SIR) of a single type of signal, including at least one of the following metrics:

[0347] (1) Used to evaluate the signal quality of the first target path:

[0348] The twenty - first metric = the first metric / the fourth metric;

[0349] The twenty - second metric = the first metric / the eleventh metric;

[0350] The twenty - third metric = the first metric / the eighteenth metric;

[0351] (2) Used to evaluate the signal quality of the second target path:

[0352] The twenty - fourth metric = the second metric / the fifth metric;

[0353] The twenty - fifth metric = the second metric / the twelfth metric;

[0354] The twenty - sixth metric = the second metric / the nineteenth metric;

[0355] (3) Used to evaluate the signal quality of the third target path:

[0356] The 27th indicator = the 3rd indicator / the 6th indicator;

[0357] The 28th indicator = the 3rd indicator / the 13th indicator;

[0358] The 29th indicator = the 3rd indicator / the 20th indicator.

[0359] Type II: Comprehensively evaluate the useful signal quality (SINR / SNR / SIR), including at least one of the following indicators:

[0360] The 30th indicator = K2 * the 21st indicator + K3 * the 24th indicator + K4 * the 27th indicator; where K2, K3, and K4 are coefficients not less than 0;

[0361] The 31st indicator = K5 * the 22nd indicator + K6 * the 25th indicator + K7 * the 28th indicator; where K5, K6, and K7 are coefficients not less than 0;

[0362] The 32nd indicator = K8 * the 23rd indicator + K9 * the 26th indicator + K 10 * the 29th indicator; where K8, K9, K 10 are coefficients not less than 0;

[0363] The 33rd indicator = K 11 *(the 1st indicator / the 10th indicator) + K 12 *(the 2nd indicator / the 10th indicator) + K 13 *(the 3rd indicator / the 10th indicator); where K 11 , K 12 , K 13 are coefficients not less than 0;

[0364] The 34th indicator = K 14 *(the 1st indicator / the 17th indicator) + K 15 *(the 2nd indicator / the 17th indicator) + K 16 *(the 3rd indicator / the 17th indicator); where K 14 , K 15 , K 16 are coefficients not less than 0;

[0365] The 35th indicator = K 17 *(the 1st indicator / the 7th indicator) + K 18 *(the 2nd indicator / the 7th indicator); where K 17 , K 18 are coefficients not less than 0;

[0366] The 36th indicator = K 19 *(the 2nd indicator / the 8th indicator) + K 20*(Third Index / Eighth Index); where K 19 , K 20 is a coefficient not less than 0;

[0367] Thirty-seventh Index = K 21 *(First Index / Ninth Index) + K 22 *(Third Index / Ninth Index); where K 21 , K 22 is a coefficient not less than 0;

[0368] Thirty-eighth Index = K 23 *(First Index / Fourteenth Index) + K 24 *(Second Index / Fourteenth Index); where K 23 , K 24 is a coefficient not less than 0;

[0369] Thirty-ninth Index = K 25 *(Second Index / Fifteenth Index) + K 26 *(Third Index / Fifteenth Index); where K 25 , K 26 is a coefficient not less than 0;

[0370] Fortieth Index = K 27 *(First Index / Sixteenth Index) + K 28 *(Third Index / Sixteenth Index); where K 27 , K 28 is a coefficient not less than 0;

[0371] Forty-first Index = K 29 *(First Index / Eighteenth Index) + K 30 *(Second Index / Nineteenth Index) + K 31 *(Third Index / Twentieth Index); where K 29 , K 30 , K 31 is a coefficient not less than 0.

[0372] It should be noted that the above " / " refers to the division operation. For example, Third Index / Twentieth Index means dividing the Third Index by the Twentieth Index.

[0373] In one implementation, the calculation methods of the First Index, the Second Index, or the Third Index are as follows:

[0374] The terminal performs channel estimation based on the target signal X(k) and the received signal Y(k) corresponding to the target signal to obtain the channel response H(k) = Y(k) / X(k), where k = 0, 1, 2, …, K-1 represents the resource unit index. After the terminal obtains the channel response H(k), it transforms it to the first dimension and determines the target path in the first dimension. Then, it calculates the power of the target path as the first metric. If the target path includes multiple paths, it calculates the sum of the powers of the multiple paths as the first metric.

[0375] Among them, the target signal can be any one of the first target signal, the second target signal, and the third target signal; the target path can be any one of the first target path, the second target path, and the third target path; when the target signal is the first target signal, the target path is the first target path; when the target signal is the second target signal, the target path is the second target path; when the target signal is the third target signal, the target path is the third target path.

[0376] Among them, the first dimension includes one of the following:

[0377] Delay dimension;

[0378] Doppler dimension;

[0379] Azimuth angle dimension;

[0380] Elevation angle dimension;

[0381] Among the delay dimension, Doppler dimension, azimuth angle dimension, and elevation angle dimension, a dimension that combines at least two of them. For example, the delay-Doppler dimension, the delay-Doppler-angle dimension, etc.

[0382] For example, if H(f) is the channel response, where f = 0, 1, 2, …, N−1 represents frequency-domain sampling points (such as subcarrier indices), then H(f) can be transformed to the delay dimension (the first dimension) by performing an inverse Fourier transform on H(f); for another example, if H(f,t) is the channel response, where f = 0, 1, 2, …, N−1 represents frequency-domain sampling points (such as subcarrier indices) and t = 0, 1, 2, …, M−1 represents time-domain sampling points (such as OFDM symbol indices), then H(f,t) can be transformed to the delay-Doppler dimension (the first dimension) by performing an inverse Fourier transform along the frequency domain dimension and a Fourier transform along the time domain dimension; for another example, if H(f,t,s) is the channel response, where f = 0, 1, 2, …, N−1 represents frequency-domain sampling points (such as subcarrier indices), t = 0, 1, 2, …, M−1 represents time-domain sampling points (such as OFDM symbol indices), and s = 0, 1, 2, …, P−1 represents spatial domain sampling points (antenna indices or port indices), then H(f,t,s) can be transformed to the delay-Doppler-angle dimension (the first dimension) by performing an inverse Fourier transform along the frequency domain dimension, a Fourier transform along the time domain dimension, and a Fourier transform along the antenna domain dimension.

[0383] In one implementation, the method for determining the target path in the channel response measured for the target signal is as follows:

[0384] Determine the first path set. The paths in the first path set include the paths among all the paths whose amplitude / power / intensity / energy exceeds a certain threshold after the channel response is transformed to the first dimension. (For example Figure 6 in, paths 0, 1, 2, 3 are the paths in the first path set); the certain threshold can be set to be higher than the noise threshold or higher than the noise interference threshold. Note: This step (determining the first path set) is optional, and the target path can be determined only according to the next step;

[0385] Select the paths that meet the first condition from the first path set or from all the paths as the target paths.

[0386] Wherein, the first condition includes at least one of the following:

[0387] The amplitude / power / intensity / energy of the path exceeds a preset threshold or is within a preset interval range; for example, the preset threshold is 5 times higher than the noise threshold;

[0388] The Doppler of the path exceeds a preset threshold or is within a preset interval range;

[0389] The delay of the path exceeds a preset threshold or is within a preset interval range;

[0390] The angle of the path exceeds a preset threshold or is within a preset interval range;

[0391] The difference in amplitude / power / intensity / energy between the path and the first-arrival path (e.g., the LOS path) or the reference path (e.g., the signal path reflected by a known target (e.g., a Reconfigurable Intelligent Surface (RIS) / Backscatter device / other known passive target, etc.)) exceeds a preset threshold or lies within a preset range;

[0392] The Doppler difference between the path and the first-arrival path (e.g., the LOS path) or the reference path (e.g., the signal path reflected by a known target (e.g., RIS / Backscatter device / other known passive target, etc.)) exceeds a preset threshold or lies within a preset range;

[0393] The time-delay difference between the path and the first-arrival path (e.g., the LOS path) or the reference path (e.g., the signal path reflected by a known target (e.g., RIS / Backscatter device / other known passive target, etc.)) exceeds a preset threshold or lies within a preset range;

[0394] The angle difference between the path and the first-arrival path (e.g., the LOS path) or the reference path (e.g., the signal path reflected by a known target (e.g., RIS / Backscatter device / other known passive target, etc.)) exceeds a preset threshold or lies within a preset range;

[0395] The amplitude / power / intensity / energy or phase of the path satisfies a specific modulation rule, and the specific modulation rule is the modulation rule of the tag / Backscatter device / RIS, that is, the target path can be the path modulated and reflected by the tag / Backscatter device / RIS.

[0396] It should be noted that the above first conditions for each item can also be based on the results of statistics over a period of time; for example, the proportion of the above indicators (e.g., the Doppler of the path, the time delay of the path, etc.) exceeding the preset threshold or lying within the preset range reaches a preset proportion within a preset time window, or the number of times the above indicators (e.g., the Doppler of the path, the time delay of the path, etc.) exceed the preset threshold or lie within the preset range reaches a preset number within a preset time window.

[0397] Among them, the preset threshold or the set range is sent by other devices to the receiving device, and is determined by other devices according to the perceived prior information or the perceived requirements. Or, the preset threshold or the set range is determined by the receiving device according to the perceived prior information or the perceived requirements.

[0398] Among them, the perceived prior information or the perceived requirements include the following information:

[0399] Perception services or perception service types. The perception services can be, for example, detecting the presence of a target, positioning, speed detection, distance detection, angle detection, acceleration detection, material analysis, component analysis, shape detection, category classification, radar cross section (RCS) detection, polarization scattering characteristic detection, fall detection, intrusion detection, quantity statistics, indoor positioning, gesture recognition, lip reading recognition, gait recognition, expression recognition, face recognition, breathing monitoring, heart rate monitoring, pulse monitoring, humidity / brightness / temperature / atmospheric pressure monitoring, air quality monitoring, weather condition monitoring, environment reconstruction, terrain and landform, building / vegetation distribution detection, pedestrian or vehicle flow detection, crowd density / vehicle density detection, etc. The perception service types can classify multiple different perception services according to certain characteristics. For example, they can be classified into detection-type perception services (such as intrusion detection, fall detection) according to function, parameter estimation-type perception services (distance, angle, speed calculation), recognition-type perception services (action recognition, identity recognition), etc. They can also be classified according to the perception range (close-range perception, medium-range perception, long-range perception), according to the perception fineness (coarse-grained perception, fine-grained perception, etc.), according to power consumption / energy consumption, according to resource occupancy, etc. If the perception service is breathing monitoring, the corresponding normal breathing frequency can be judged according to the gender and age of a person (for example, male: 13 - 21 times per minute, female: 15 - 20 times per minute; adult: 12 - 20 times per minute, child: about 30 - 40 times per minute), which can be used as perception prior information;

[0400] Perceived target area: It refers to the position area of the perception object, or the position area that needs to be imaged or reconstructed. For example, determine the preset interval range of the time delay of the target path according to the approximate position / distance of the perception object;

[0401] Perception object type: Classify the perception objects according to their possible motion characteristics. Each perception object type contains information such as the motion speed range, motion acceleration range, and typical RCS range of typical perception objects;

[0402] The number of perceived targets; for example, the perception result of a camera can be used as a kind of perception prior information to obtain the number of perceived targets.

[0403] For example Figure 6 In, paths 0, 1, 2, 3 are paths in the first path set, where paths 2, 3 are the perception paths that meet the first condition (for example, their time delay meets the preset threshold), and paths 0, 1 are the paths associated with other scatterers. Figure 6 It is a multipath schematic diagram of the channel response in the first dimension (time delay dimension, Doppler dimension, azimuth angle dimension, or elevation angle dimension). In Figure 6In it, the horizontal axis is the first dimension, and the vertical axis is the normalized amplitude / power / intensity / energy.

[0404] For frequency range 1, the reference point of the first metric can be the antenna connector of a receiving device such as a terminal. For frequency range 1, if the receiving device has multiple receiving channels, the first metric measured and reported by the receiving device shall not be lower than that of any single receiving channel. For frequency range 2, the first metric measured by a certain receiving channel needs to be obtained by measuring the combined signals on multiple antenna elements corresponding to that receiving channel.

[0405] In one implementation, the calculation methods of the first metric, the second metric, or the third metric are as follows:

[0406] Optionally, when calculating the received power of the target path, it can also be the difference between the power of the target path in the first dimension and as the first metric, where N1 represents the number of target paths. is the average power of multiple paths outside the first path set in the first dimension.

[0407] In one implementation, the calculation method of the received power of the target signal is as follows:

[0408] The received power of the target signal can be that after the receiving device obtains the channel response H(k), it transforms it into the first dimension, determines the first path set in the first dimension, and then calculates the sum of the powers of all paths in the first path set.

[0409] In one implementation, the calculation method of the received power of the target signal is as follows:

[0410] The received power of the target signal can also be the difference between the sum of the powers of all paths in the first path set in the first dimension and where N2 represents the number of paths in the first path set.

[0411] The calculation method of the total received power is as follows:

[0412] Total received power

[0413] In one implementation, the calculation methods of the fourth to tenth metrics are as follows:

[0414] The channel response H(k) is subjected to the first filtering process to obtain H filter1 (k), and then according to H filter1(k) and the target signal X(k) are used to calculate the first filtered received signal Y filter1 (k), that is, Y filter1 (k) = H filter1 (k)X(k). Then the received signal Y(k) is subtracted from the first filtered received signal Y filter1 (k) to obtain the interference and noise signal Y σ1 (k), that is, Y σ1 (k) = Y(k) - Y filter1 (k), and then the fourth (or any one of the fifth to tenth) index is calculated

[0415] Among them, the first filtering process is used to eliminate noise, interference, and non-target paths in the first dimension. For example, the first filtering process sets Figure 6 the amplitude / power / intensity / energy of other paths except the target path in to zero. The channel response H filter1 (k) after the first filtering process does not contain noise, interference, and non-target paths, and only contains the target path.

[0416] In one implementation, the calculation methods of the eleventh to seventeenth indices are as follows:

[0417] The channel response H(k) is subjected to a second filtering process to obtain H filter2 (k), and then based on H filter2 (k) and the target signal X(k), the second filtered received signal Y filter2 (k) is calculated, that is, Y filter2 (k) = H filter2 (k)X(k). Then the received signal Y(k) is subtracted from the second filtered received signal Y filter2 (k) to obtain the interference and noise signal Y σ2 (k), that is, Y σ2 (k) = Y(k) - Y filter2 (k), and then the eleventh (or any one of the twelfth to seventeenth) index is calculated

[0418] The second filtering process can be a noise interference suppression process in the first dimension (for example Figure 6 setting the amplitude / power / intensity / energy of other paths except the first path set in to zero), or MMSE filtering. The channel response H filter2 (k) after the second filtering process does not contain noise and interference, and only contains the paths in the first path set.

[0419] In one implementation, the calculation methods of the eleventh to seventeenth indices are as follows:

[0420] According to the average power of multiple paths outside the first path set in the first dimension the eleventh (or any one of the twelfth to seventeenth) index P is calculated σ2 , that is where N represents the number of sampling points in the first dimension.

[0421] Optionally, the first device is a node device among the at least one first signal sender.

[0422] See Figure 7 , Figure 7 is a flowchart of a method for selecting a sensing device provided by an embodiment of the present application. As Figure 7 shown, the method for selecting a sensing device includes the following steps:

[0423] Step 201: The first node performs a first measurement based on the first signals sent by at least one first signal sender to obtain at least one measurement value of a first target metric, and the first signals are backscattered from the first signal sender to the first node through at least one backscatter device;

[0424] The first node sends at least one measurement value of the first target metric to a first device, and the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0425] Optionally, the first node performing a first measurement based on the first signals sent by at least one first signal sender includes:

[0426] The first node performs a first measurement based on first configuration information and the first signals sent by at least one first signal sender, and the first configuration information is used to configure the first measurement.

[0427] Optionally, the first configuration information includes at least one of the following:

[0428] Modulation type of the backscatter device; spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; spreading sequence of the backscatter device; time-frequency resources used by the backscatter device for the first measurement; capability information of the backscatter device for the first measurement; manner in which the backscatter device assists the first measurement.

[0429] Optionally, the first target metric includes at least one of the following:

[0430] Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

[0431] Optionally,

[0432] The metrics related to the received power include at least one of the following:

[0433] The first metric; the second metric; the third metric;

[0434] Or

[0435] The metrics related to the interference or noise power include at least one of the following:

[0436] The fourth metric; the fifth metric; the sixth metric; the seventh metric; the eighth metric; the ninth metric; the tenth metric; the eleventh metric; the twelfth metric; the thirteenth metric; the fourteenth metric; the fifteenth metric; the sixteenth metric; the seventeenth metric; the eighteenth metric; the nineteenth metric; the twentieth metric;

[0437] Or

[0438] The metrics related to both the received power and the interference or noise power include at least one of the following:

[0439] The twenty - first metric; the twenty - second metric; the twenty - third metric; the twenty - fourth metric; the twenty - fifth metric; the twenty - sixth metric; the twenty - seventh metric; the twenty - eighth metric; the twenty - ninth metric; the thirtieth metric; the thirty - first metric; the thirty - second metric; the thirty - third metric; the thirty - fourth metric; the thirty - fifth metric; the thirty - sixth metric; the thirty - seventh metric; the thirty - eighth metric; the thirty - ninth metric; the fortieth metric; the forty - first metric;

[0440] Wherein, the first metric is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal;

[0441] The second metric is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal;

[0442] The third metric is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0443] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0444] The fourth metric is determined based on the difference between the first total received power and the first metric;

[0445] The fifth indicator is determined based on the difference between the second total received power and the second indicator;

[0446] The sixth indicator is determined based on the difference between the third total received power and the third indicator;

[0447] The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator;

[0448] The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator;

[0449] The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator;

[0450] The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0451] The eleventh indicator is determined based on the difference between the first total received power and the first target signal received power;

[0452] The twelfth indicator is determined based on the difference between the second total received power and the second target signal received power;

[0453] The thirteenth indicator is determined based on the difference between the third total received power and the third target signal received power;

[0454] The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the first target signal received power and the second target signal received power;

[0455] The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power;

[0456] The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0457] The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0458] The eighteenth indicator is determined based on the difference between the first target signal received power and the first indicator;

[0459] The nineteenth index is determined based on the difference between the second target signal reception power and the second index;

[0460] The twentieth index is determined based on the difference between the third target signal reception power and the third index;

[0461] The twenty-first index is determined based on the quotient of the first index and the fourth index;

[0462] The twenty-second index is determined based on the quotient of the first index and the eleventh index;

[0463] The twenty-third index is determined based on the quotient of the first index and the eighteenth index;

[0464] The twenty-fourth index is determined based on the quotient of the second index and the fifth index;

[0465] The twenty-fifth index is determined based on the quotient of the second index and the twelfth index;

[0466] The twenty-sixth index is determined based on the quotient of the second index and the nineteenth index;

[0467] The twenty-seventh index is determined based on the quotient of the third index and the sixth index;

[0468] The twenty-eighth index is determined based on the quotient of the third index and the thirteenth index;

[0469] The twenty-ninth index is determined based on the quotient of the third index and the twentieth index;

[0470] The thirtieth index is determined based on the sum of the product of the first coefficient and the twenty-first index, the product of the second coefficient and the twenty-fourth index, and the product of the third coefficient and the twenty-seventh index;

[0471] The thirty-first index is determined based on the sum of the product of the fourth coefficient and the twenty-second index, the product of the fifth coefficient and the twenty-fifth index, and the product of the sixth coefficient and the twenty-eighth index;

[0472] The thirty-second index is determined based on the sum of the product of the seventh coefficient and the twenty-third index, the product of the eighth coefficient and the twenty-sixth index, and the product of the ninth coefficient and the twenty-ninth index;

[0473] The thirty-third index is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity, where the ninth intermediate quantity is the quotient of the first index and the tenth index, the tenth intermediate quantity is the quotient of the second index and the tenth index, and the eleventh intermediate quantity is the quotient of the third index and the tenth index;

[0474] The thirty-fourth index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the seventeenth index. The thirteenth intermediate quantity is the quotient of the second index and the seventeenth index. The fourteenth intermediate quantity is the quotient of the third index and the seventeenth index;

[0475] The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index. The sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0476] The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index. The eighteenth intermediate quantity is the quotient of the third index and the eighth index;

[0477] The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index. The twentieth intermediate quantity is the quotient of the third index and the ninth index;

[0478] The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index. The twenty-second intermediate quantity is the quotient of the second index and the fourteenth index;

[0479] The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index. The twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index;

[0480] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index. The twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index;

[0481] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index. The twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index. The twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index;

[0482] Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal;

[0483] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal;

[0484] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal;

[0485] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal;

[0486] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource unit carrying the second target signal and the time-frequency domain resource unit carrying the third target signal;

[0487] The sixth total received power is the linear average of the total received power on the sixth target resource, and the sixth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the third target signal;

[0488] The seventh total received power is the linear average of the total received power on the seventh target resource, and the seventh target resource includes the time-frequency domain resource unit carrying the first target signal, the time-frequency domain resource unit carrying the second target signal, and the time-frequency domain resource unit carrying the third target signal;

[0489] Wherein, the first target signal is the first signal;

[0490] Or,

[0491] The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path;

[0492] Or,

[0493] The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0494] It should be noted that, as the implementation manner of the first node corresponding to the embodiment shown in Figure 5 the relevant description of the embodiment shown in can be referred to for the same or corresponding implementation manners. To avoid repeated description, this embodiment will not be elaborated herein. Figure 5 shown in the embodiment shown in, for avoiding repeated description, this embodiment will not be elaborated herein.

[0495] Refer to Figure 8 , Figure 8 which is a flowchart of a method for selecting a sensing device provided by an embodiment of the present application. As shown in Figure 8 shown, the method for selecting a sensing device includes the following steps:

[0496] Step 301, the backscatter device processes the first signal sent by at least one first signal sender based on the first configuration information; the first signal is used to perform a first measurement to obtain at least one measurement value of a first target metric;

[0497] The at least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation.

[0498] Optionally, the method further includes:

[0499] The backscatter device receives the first configuration information sent by the first device;

[0500] wherein, the first configuration information includes at least one of the following:

[0501] The modulation type of the backscatter device; the spreading factor, modulation rate, or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0502] It should be noted that, as the implementation manner of the candidate target node or the target sensing node corresponding to the embodiment shown in Figure 5 or Figure 7 shown in the embodiment shown in, the specific implementation manner can be referred to the relevant description of the embodiment shown in Figure 5 or Figure 7 shown in. To avoid repeated description, this embodiment will not be elaborated herein.

[0503] The method for selecting a sensing device provided by an embodiment of the present application will be described below through several specific embodiments:

[0504] In the embodiment of the present application, when performing the first measurement, the node that sends the first signal is the second node, and the node that receives the first signal is the first node. After the sensing node selection, the selected second device is the target backscatter device, the selected first node is the first signal receiver for performing the sensing operation, and the selected second node is the first signal sender for performing the sensing operation.

[0505] In the embodiment of the present application, the second device is a backscatter device.

[0506] Step 1: The second node and / or the first device acquire first information. The first information includes at least one of the following:

[0507] (1) A list of sensing tag IDs of the associated sensing area or sensing target (not limited to the Electronic Product Code (EPC) of RFID, and can also be the ID of a new device);

[0508] (2) The number of tags of the associated sensing area or sensing target;

[0509] (3) The status information of the tag, including at least one of the following: the position information of the tag (such as two-dimensional position information or three-dimensional position information, including the Cartesian coordinates or polar coordinates of the tag and the origin of the reference system), the velocity information of the tag (magnitude and direction), the tag antenna orientation information, the activation / deactivation information of the tag;

[0510] (4) Perceived tag capability information, including at least one of the following: tag perception range, tag operating bandwidth, operating frequencies of each channel of the tag (i.e., subcarrier frequencies within the bandwidth), tag modulation method, supported read and write frequencies, number of antennas per tag (including transmitting antennas and receiving antennas), antenna array information of a single tag (antenna spacing, antenna array pattern, etc. of a single tag), tag array arrangement information (here referring to a tag array formed by multiple tags, with 1 tag as 1 array element, including tag spacing, tag array pattern, etc.), error statistical distribution parameters of the phase of the tag reflected signal, tag power supply method (including passive, semi - passive, active), battery level information of an active tag, energy storage capacity (i.e., maximum energy storage capacity of the tag), tag amplitude modulation ability (i.e., amplitude information of the adjustable reflected signal supported by the tag, continuous amplitude modulation or discrete amplitude modulation and the number of states of the corresponding continuous or discrete characteristics), tag phase modulation ability (i.e., phase information of the adjustable reflected signal supported by the tag, continuous phase modulation or discrete phase modulation and the number of states of the corresponding continuous or discrete characteristics), tag frequency modulation ability (i.e., frequency information of the adjustable reflected signal supported by the tag, continuous frequency modulation or discrete frequency modulation and the number of states of the corresponding continuous or discrete characteristics), tag duplex ability (including support for half - duplex, support for full - duplex, support for sub - band full - duplex), amplification ability (amplification factor), frequency shifting ability (including frequency shifting at the level of, for example, KHz, MHz), side - band suppression ability (including having, not having, only having upper side - band suppression ability, only having lower side - band suppression ability), carrier generation ability, measurement ability (i.e., the ability to obtain perceived measurement quantities (see the relevant description of the aforementioned perceived measurement quantities), including whether there is a measurement ability and what kind of perceived measurement quantity measurement ability is available), self - perception ability (including whether it is possible to obtain information on changes in tag antenna and circuit impedance, and whether the tag MCU can obtain dedicated sensor measurement information);

[0511] (5) Type of tag encryption algorithm (such as CRC 16 or CRC 24, etc.), type of channel coding FEC and the corresponding coding rate. CRC refers to Cyclic Redundancy Check. FEC refers to Forward Error Correction.

[0512] In addition, the second node and / or the first device obtains second information. The second information includes at least one of the following:

[0513] (1) Available resource information, that is, the resource information available for sensing / communication integration at the first node, including at least one of the following: available bandwidth resources (including: the number of Physical Resource Blocks (PRBs), the number of subcarriers, the number of Resource Elements (REs) in the frequency domain, the number of Bandwidth Parts (BWPs)), available time resources (including: the number of OFDM frames, the number of OFDM time slots, the number of OFDM symbols, the number of time-domain resource units), available antenna resources (including: the number of antenna ports (including the number in the horizontal and vertical directions, and the total number), the number of physical antennas (including the number in the horizontal and vertical directions, and the total number), the antenna port index, the physical antenna index);

[0514] (2) Hardware information of the first node, including at least one of the following:

[0515] Antenna port information (including: the position coordinates of the equivalent phase center of the antenna port relative to a predetermined reference point on the antenna array, the antenna port formation, the number of physical antennas of the sub-array connected to the antenna port), physical antenna information (the position coordinates of the physical antenna relative to a predetermined reference point on the antenna array, the physical antenna formation, the formation of the sub-array connected to the antenna port);

[0516] The formation includes: linear array, planar array, circular array, cylindrical array, L-shaped array, non-uniform array, etc.

[0517] (3) Detection capability indication information of the first node, including at least one of the following: the Noise Floor Level (NFL) in the delay domain of at least one antenna port, the Noise Floor Level in the Doppler domain of at least one antenna port, the Noise Floor Level in the angle domain of multiple antenna ports, the detection dynamic range in the delay domain of at least one antenna port, the detection dynamic range in the Doppler domain of at least one antenna port, the detection dynamic range in the angle domain of multiple antenna ports;

[0518] (4) Status information of the second node and / or the first node, including at least one of the following: the position information of the second node and / or the first node (two-dimensional or three-dimensional, including the Cartesian coordinates or polar coordinates of the second node and / or the first node and the origin of the reference system), the velocity information of the second node and / or the first node (magnitude and direction), the antenna / antenna array orientation information of the second node and / or the first node.

[0519] Optionally, the second node and / or the first device obtains third information. The third information includes at least one of the following: a measurement value of a first target metric (see the related description of the foregoing first target metric), a measurement value of a historical perception measurement quantity (see the related description of the foregoing perception measurement quantity), a historical perception result, a historical measurement value of a second target metric (see the related description of the foregoing measurement value of the first target metric);

[0520] Optionally, the second node and / or the first device obtains fourth information. The fourth information includes at least one of the following: perception QoS (see the related description of the foregoing perception QoS), communication QoS, perception prior information (see the related description of the foregoing perception prior information);

[0521] In addition, the transmission of the first information, the second information, the third information, and the fourth information may be at least one of the following cases:

[0522] Sent from the first node to the second node;

[0523] Sent from the first node to the first device and then from the first device to the second node;

[0524] Sent from the first device to the second node;

[0525] Sent from the second node and / or the first node to the first device.

[0526] Step 2: The second node and / or the first device determines first configuration information and / or second configuration information based on at least one of the obtained first information, second information, third information, and fourth information. The first configuration information is used for the second device to perform a first measurement, and the result of the first measurement is used to assist the second node or the first device in selecting at least one of a target reflection scattering device, a second target node, and a first target node. The second configuration information is used for the first node to perform a first measurement.

[0527] Wherein, the first configuration information includes at least one of the following:

[0528] The modulation type of the second device, for example, modulation methods such as ASK (including OOK), FSK, PSK, QAM, etc.;

[0529] The spreading factor or modulation rate or Backscatter Link Frequency (BLF) of the modulation;

[0530] The spreading sequence of the second device, for example, ZC sequence, Gold sequence;

[0531] The time-frequency resources used by the second device for the first measurement;

[0532] The capability information of the second device for the first measurement includes whether to use an LNA or not;

[0533] The measurement method of the second device for performing the first measurement includes at least one of the following: measuring the RSRP and measuring the RSSI.

[0534] Among them, for the said second configuration information, refer to the relevant description of the foregoing second configuration information.

[0535] In addition, the second node and / or the first device send the first configuration information to at least one second device, and send the first configuration information and the second configuration information to the first node. Optionally, the second node and / or the first device send the second configuration information to at least one second device.

[0536] Step 3: The second node, the first node, and the second device perform the first measurement based on the first configuration information and / or the second configuration information. The first node obtains the first target metric measurement value based on the first measurement. Optionally, the first node obtains at least one of the perceived measurement value and the second target metric measurement value.

[0537] Step 4: The first node sends at least one of the first target metric measurement value, the perceived measurement value, and the second target metric measurement value to the second node and / or the first device. The second node and / or the first device perform at least one of the following operations based on at least one of the obtained first target metric measurement value, the perceived measurement value, and the second target metric measurement value:

[0538] Determine the target reflection and scattering device in the second device, where the target reflection and scattering device is the backscatter device for subsequent sensing services.

[0539] Determine the second target node in the second node, where the second target node is the first signal sending node (i.e., the first signal sender) for subsequent sensing services;

[0540] Determine the first target node in the first node, where the first target node is the first signal receiving node (i.e., the first signal receiver) for subsequent sensing services.

[0541] Embodiment 2:

[0542] This embodiment realizes the selection of the second device based on the sensing link metrics.

[0543] The selection of the second device includes at least one of the following cases:

[0544] Case 1: In the A transmits and B receives mode, the second device is selected based on the first target metric measurement value;

[0545] Case 2: In the A transmits and receives by itself mode, the second device is selected based on the first target metric measurement value.

[0546] In step 1: The second node and / or the first device obtains at least one of the first information, the second information, the third information, and the fourth information, where the first information is a mandatory option, and the second information, the third information, and the fourth information are optional options;

[0547] In step 2: The second node and / or the first device determines the first configuration information and / or the second configuration information based on at least one of the obtained first information, second information, third information, and fourth information. Among them, the first configuration information is a mandatory option, and the second configuration information is an optional option;

[0548] In step 3: At least one second device performs a first measurement based on the first configuration information.

[0549] If it is Case 1:

[0550] The second node and the first node can respectively send and receive a first signal based on the second configuration information or a pre-determined configuration information, where the first node receives the first signal reflected by at least one second device. The first node obtains a first target index measurement value based on the first measurement.

[0551] If it is Case 2:

[0552] The second node can send and receive a first signal based on the second configuration information or a pre-determined configuration information, where the second node receives the first signal reflected by at least one second device and obtains a first target index measurement value based on the first measurement.

[0553] The target measurement value includes at least one of the following: Type I indicators: the twenty-first indicator, the twenty-third indicator; the twenty-fourth indicator, the twenty-sixth indicator; the twenty-seventh indicator, the twenty-ninth indicator; Type II indicators: the thirtieth indicator, the thirty-second indicator, the forty-first indicator.

[0554] In step 4:

[0555] If it is Case 1:

[0556] The first node sends at least one of the first target index measurement value, the perception measurement value, and the second target index measurement value to the second node and / or the first device.

[0557] The second node or the first device determines a target reflection and scattering device in the second device based on at least one of the first target index measurement value, the perception measurement value, and the second target index measurement value, and the target reflection and scattering device is a backscattering device for subsequent perception services.

[0558] If it is Case 2:

[0559] Based on at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value, the second node determines a target reflection and scattering device in the second device.

[0560] Alternatively, the second node sends at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value to the first device. The first device determines a target reflection and scattering device in the second device based on the at least one of the above.

[0561] Embodiment 3:

[0562] In the embodiment, the selection of the sensing nodes is implemented based on the sensing link metrics.

[0563] The selection of the sensing nodes includes at least one of the following cases:

[0564] Case 1: In the A transmits and B receives mode, based on the first target metric measurement value, nodes A and / or B (i.e., the second node and / or the first node) are selected;

[0565] Case 2: In the A transmits and A receives mode, based on the first target metric measurement value, node A (i.e., the second node) is selected;

[0566] In step 1: The first device obtains at least one of the first information, the second information, the third information, and the fourth information, where the second information is a mandatory option, and the first information, the third information, and the fourth information are optional options;

[0567] Alternatively, there may be one third node, and this third node obtains at least one of the first information, the second information, the third information, and the fourth information, where the second information is a mandatory option, and the first information, the third information, and the fourth information are optional options. The third node includes the second node or a candidate second node, and it can be determined by the first device.

[0568] In step 2: The third node and / or the first device determines the first configuration information and / or the second configuration information based on at least one of the obtained first information, second information, third information, and fourth information. Among them, the second configuration information is a mandatory option, and the first configuration information is an optional option;

[0569] In step 3:

[0570] If it is Case 1:

[0571] At least one second node, and / or, at least one first node sends and receives a first signal based on the second configuration information, where at least one first node receives the first signal reflected by at least one second device based on the first configuration information or the pre-determined configuration information. At least one first node obtains the first target metric measurement value based on the first measurement.

[0572] If it is Case 2:

[0573] At least one second node may send and receive a first signal based on second configuration information, where at least one second node receives the first signal reflected by at least one second device based on first configuration information or predetermined configuration information, and obtains a first target metric measurement value based on a first measurement.

[0574] The first target metric measurement value includes at least one of the following: Type I metrics: the twenty-first metric, the twenty-third metric; the twenty-fourth metric, the twenty-sixth metric; the twenty-seventh metric, the twenty-ninth metric; Type II metrics: the thirtieth metric, the thirty-second metric, the forty-first metric.

[0575] In Step 4:

[0576] If it is Case 1:

[0577] At least one first node sends at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value to a third node and / or a first device.

[0578] The third node or the first device determines a second target node in the second node based on at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value, where the second target node is the first signal sending node for subsequent sensing services; and / or,

[0579] Determine a first target node in the first node, where the first target node is the first signal receiving node for subsequent sensing services;

[0580] If it is Case 2:

[0581] The second node sends at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value to a third node and / or a first device, and the third node and / or the first device determines a second target node in the second node based on at least one of the first target metric measurement value, the sensed measurement value, and the second target metric measurement value, where the second target node is the first signal sending node for subsequent sensing services; and / or,

[0582] Determine a first target node in the first node, where the first target node is the first signal receiving node for subsequent sensing services.

[0583] In the related art, wireless sensing based on low-power backscatter devices (such as RFID tags or Backscatter tags) in a (cellular) mobile communication network is an important development trend in the integration of communication and sensing, with broad application scenarios. However, currently, when the network selects backscatter devices for performing sensing or the integration of communication and sensing, the process and the related signaling interaction content are not clear.

[0584] An embodiment of the present application designs a method for selecting backscatter tags and sensing nodes based on a first target metric, where the selected backscatter tags are used to perform sensing services, improve network sensing performance, or eliminate non-ideal factors in sensing. For sensing involving backscatter tags, a detailed definition of the first target metric is given, and the first target metric can be used to evaluate the link signal quality associated with the backscatter tags. An embodiment of the present application designs the signaling interaction content and the interaction process that match the method.

[0585] For the sensing device selection method provided by an embodiment of the present application, the execution subject may be a sensing device selection apparatus. In an embodiment of the present application, taking the sensing device selection apparatus as an example to execute the sensing device selection method, the sensing device selection apparatus provided by the embodiment of the present application is described.

[0586] Please refer to Figure 9 , Figure 9 which is a structural diagram of a sensing device selection apparatus provided by an embodiment of the present application. The first device includes the sensing device selection apparatus. As Figure 9 shown, the sensing device selection apparatus 400 includes:

[0587] An acquisition module 401, configured to acquire at least one measurement value of a first target metric for a first device, where the at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node through at least one backscatter device;

[0588] A first determination module 402, configured to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measurement value of the first target metric.

[0589] Optionally, the apparatus further includes:

[0590] A second determination module, configured to determine first configuration information for configuring the first measurement;

[0591] A sending module, configured to send the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node.

[0592] Optionally, the first configuration information includes at least one of the following:

[0593] The modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0594] Optionally, the second determination module is specifically configured to:

[0595] Determine the first configuration information or the second configuration information based on at least one of the first information, the second information, the third information, and the fourth information;

[0596] Wherein, the first information includes at least one of the following:

[0597] The identifier of the backscatter device within the sensing area; the identifier of the backscatter device of the sensing target; the number of backscatter devices within the sensing area; the number of backscatter devices of the sensing target; the status information of the backscatter device; the sensing capability information of the backscatter device; the type of encryption algorithm of the backscatter device; the channel coding related information of the backscatter device;

[0598] The second information includes at least one of the following:

[0599] The available resource information of the first node; the hardware related information of the first node; the detection capability indication information of the first node; the status information of the first node or the first node;

[0600] The third information includes at least one of the following:

[0601] The measured value of the first target metric; the measured value of the sensing measurement quantity; the sensing result; the measured value of the second target metric;

[0602] The fourth information includes at least one of the following:

[0603] The sensing quality of service QoS; the communication QoS; the sensing prior information.

[0604] Optionally, the obtaining module is configured to:

[0605] Receive at least one measured value of the first target metric sent by at least one first node.

[0606] Optionally, the first target metric includes at least one of the following:

[0607] Indicators related to received power; indicators related to interference or noise power; indicators related to both received power and interference or noise power.

[0608] Optionally,

[0609] The indicators related to received power include at least one of the following:

[0610] The first indicator; the second indicator; the third indicator;

[0611] Or,

[0612] The indicators related to interference or noise power include at least one of the following:

[0613] The fourth indicator; the fifth indicator; the sixth indicator; the seventh indicator; the eighth indicator; the ninth indicator; the tenth indicator; the eleventh indicator; the twelfth indicator; the thirteenth indicator; the fourteenth indicator; the fifteenth indicator; the sixteenth indicator; the seventeenth indicator; the eighteenth indicator; the nineteenth indicator; the twentieth indicator;

[0614] Or

[0615] The indicators related to both received power and interference or noise power include at least one of the following:

[0616] The twenty - first indicator; the twenty - second indicator; the twenty - third indicator; the twenty - fourth indicator; the twenty - fifth indicator; the twenty - sixth indicator; the twenty - seventh indicator; the twenty - eighth indicator; the twenty - ninth indicator; the thirtieth indicator; the thirty - first indicator; the thirty - second indicator; the thirty - third indicator; the thirty - fourth indicator; the thirty - fifth indicator; the thirty - sixth indicator; the thirty - seventh indicator; the thirty - eighth indicator; the thirty - ninth indicator; the fortieth indicator; the forty - first indicator;

[0617] Among them, the first indicator is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal;

[0618] The second indicator is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal;

[0619] The third indicator is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0620] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0621] The fourth indicator is determined based on the difference between the first total received power and the first indicator;

[0622] The fifth indicator is determined based on the difference between the second total received power and the second indicator;

[0623] The sixth indicator is determined based on the difference between the third total received power and the third indicator;

[0624] The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator;

[0625] The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator;

[0626] The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator;

[0627] The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0628] The eleventh indicator is determined based on the difference between the first total received power and the first target signal received power;

[0629] The twelfth indicator is determined based on the difference between the second total received power and the second target signal received power;

[0630] The thirteenth indicator is determined based on the difference between the third total received power and the third target signal received power;

[0631] The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the first target signal received power and the second target signal received power;

[0632] The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power;

[0633] The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0634] The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0635] The eighteenth index is determined based on the difference between the first target signal reception power and the first index;

[0636] The nineteenth index is determined based on the difference between the second target signal reception power and the second index;

[0637] The twentieth index is determined based on the difference between the third target signal reception power and the third index;

[0638] The twenty - first index is determined based on the quotient of the first index and the fourth index;

[0639] The twenty - second index is determined based on the quotient of the first index and the eleventh index;

[0640] The twenty - third index is determined based on the quotient of the first index and the eighteenth index;

[0641] The twenty - fourth index is determined based on the quotient of the second index and the fifth index;

[0642] The twenty - fifth index is determined based on the quotient of the second index and the twelfth index;

[0643] The twenty - sixth index is determined based on the quotient of the second index and the nineteenth index;

[0644] The twenty - seventh index is determined based on the quotient of the third index and the sixth index;

[0645] The twenty - eighth index is determined based on the quotient of the third index and the thirteenth index;

[0646] The twenty - ninth index is determined based on the quotient of the third index and the twentieth index;

[0647] The thirtieth index is determined based on the sum of the product of the first coefficient and the twenty - first index, the product of the second coefficient and the twenty - fourth index, and the product of the third coefficient and the twenty - seventh index;

[0648] The thirty - first index is determined based on the sum of the product of the fourth coefficient and the twenty - second index, the product of the fifth coefficient and the twenty - fifth index, and the product of the sixth coefficient and the twenty - eighth index;

[0649] The thirty - second index is determined based on the sum of the product of the seventh coefficient and the twenty - third index, the product of the eighth coefficient and the twenty - sixth index, and the product of the ninth coefficient and the twenty - ninth index;

[0650] The thirty-third index is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity. The ninth intermediate quantity is the quotient of the first index and the tenth index. The tenth intermediate quantity is the quotient of the second index and the tenth index. The eleventh intermediate quantity is the quotient of the third index and the tenth index.

[0651] The thirty-fourth index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the seventeenth index. The thirteenth intermediate quantity is the quotient of the second index and the seventeenth index. The fourteenth intermediate quantity is the quotient of the third index and the seventeenth index.

[0652] The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index. The sixteenth intermediate quantity is the quotient of the second index and the seventh index.

[0653] The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index. The eighteenth intermediate quantity is the quotient of the third index and the eighth index.

[0654] The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index. The twentieth intermediate quantity is the quotient of the third index and the ninth index.

[0655] The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index. The twenty-second intermediate quantity is the quotient of the second index and the fourteenth index.

[0656] The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index. The twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index.

[0657] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index.

[0658] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0659] Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal.

[0660] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal.

[0661] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal.

[0662] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal.

[0663] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource unit carrying the second target signal and the time-frequency domain resource unit carrying the third target signal.

[0664] The sixth total received power is the linear average of the total received power on the sixth target resource, and the sixth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the third target signal.

[0665] The seventh total received power is the linear average of the total received power on the seventh target resource, and the seventh target resource includes the time-frequency domain resource unit carrying the first target signal, the time-frequency domain resource unit carrying the second target signal, and the time-frequency domain resource unit carrying the third target signal.

[0666] Wherein, the first target signal is the first signal.

[0667] Or,

[0668] The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path;

[0669] Or,

[0670] The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0671] Optionally, the first device is a node device among the at least one first signal sender.

[0672] The sensing device selection apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0673] The sensing device selection apparatus provided in the embodiments of the present application can implement Figure 5 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein again.

[0674] Please refer to Figure 10 , Figure 10 which is a structural diagram of a sensing device selection apparatus provided in the embodiments of the present application. The first node includes the sensing device selection apparatus. As Figure 10 shown, the sensing device selection apparatus 500 includes:

[0675] An obtaining module 501, configured to perform a first measurement based on a first signal sent by at least one first signal sender, and obtain at least one measurement value of a first target metric, where the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0676] A sending module 502, configured to send at least one measurement value of the first target metric to a first device, where the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0677] Optionally, the obtaining module is specifically configured to:

[0678] Perform a first measurement based on the first configuration information and the first signals sent by at least one first signal sender, where the first configuration information is used to configure the first measurement.

[0679] Optionally, the first configuration information includes at least one of the following:

[0680] The modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the way the backscatter device assists the first measurement.

[0681] Optionally, the first target metric includes at least one of the following:

[0682] Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

[0683] Optionally,

[0684] The metrics related to received power include at least one of the following:

[0685] The first metric; the second metric; the third metric;

[0686] Or,

[0687] The metrics related to interference or noise power include at least one of the following:

[0688] The fourth metric; the fifth metric; the sixth metric; the seventh metric; the eighth metric; the ninth metric; the tenth metric; the eleventh metric; the twelfth metric; the thirteenth metric; the fourteenth metric; the fifteenth metric; the sixteenth metric; the seventeenth metric; the eighteenth metric; the nineteenth metric; the twentieth metric;

[0689] Or

[0690] The metrics related to both received power and interference or noise power include at least one of the following:

[0691] The twenty-first metric; the twenty-second metric; the twenty-third metric; the twenty-fourth metric; the twenty-fifth metric; the twenty-sixth metric; the twenty-seventh metric; the twenty-eighth metric; the twenty-ninth metric; the thirtieth metric; the thirty-first metric; the thirty-second metric; the thirty-third metric; the thirty-fourth metric; the thirty-fifth metric; the thirty-sixth metric; the thirty-seventh metric; the thirty-eighth metric; the thirty-ninth metric; the fortieth metric; the forty-first metric;

[0692] Among them, the first index is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal;

[0693] The second index is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal;

[0694] The third index is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0695] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0696] The fourth index is determined based on the difference between the first total received power and the first index;

[0697] The fifth index is determined based on the difference between the second total received power and the second index;

[0698] The sixth index is determined based on the difference between the third total received power and the third index;

[0699] The seventh index is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first index and the second index;

[0700] The eighth index is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second index and the third index;

[0701] The ninth index is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first index and the third index;

[0702] The tenth index is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first index, the second index, and the third index;

[0703] The eleventh index is determined based on the difference between the first total received power and the received power of the first target signal;

[0704] The twelfth index is determined based on the difference between the second total received power and the received power of the second target signal;

[0705] The thirteenth index is determined based on the difference between the third total received power and the received power of the third target signal;

[0706] The fourteenth index is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the first target signal received power and the second target signal received power;

[0707] The fifteenth index is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power;

[0708] The sixteenth index is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0709] The seventeenth index is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0710] The eighteenth index is determined based on the difference between the first target signal received power and the first index;

[0711] The nineteenth index is determined based on the difference between the second target signal received power and the second index;

[0712] The twentieth index is determined based on the difference between the third target signal received power and the third index;

[0713] The twenty - first index is determined based on the quotient of the first index and the fourth index;

[0714] The twenty - second index is determined based on the quotient of the first index and the eleventh index;

[0715] The twenty - third index is determined based on the quotient of the first index and the eighteenth index;

[0716] The twenty - fourth index is determined based on the quotient of the second index and the fifth index;

[0717] The twenty - fifth index is determined based on the quotient of the second index and the twelfth index;

[0718] The twenty - sixth index is determined based on the quotient of the second index and the nineteenth index;

[0719] The twenty - seventh index is determined based on the quotient of the third index and the sixth index;

[0720] The twenty - eighth index is determined based on the quotient of the third index and the thirteenth index;

[0721] The twenty - ninth index is determined based on the quotient of the third index and the twentieth index;

[0722] The 30th index is determined based on the sum of the product of the first coefficient and the 21st index, the product of the second coefficient and the 24th index, and the product of the third coefficient and the 27th index;

[0723] The 31st index is determined based on the sum of the product of the fourth coefficient and the 22nd index, the product of the fifth coefficient and the 25th index, and the product of the sixth coefficient and the 28th index;

[0724] The 32nd index is determined based on the sum of the product of the seventh coefficient and the 23rd index, the product of the eighth coefficient and the 26th index, and the product of the ninth coefficient and the 29th index;

[0725] The 33rd index is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity. The ninth intermediate quantity is the quotient of the first index and the tenth index, the tenth intermediate quantity is the quotient of the second index and the tenth index, and the eleventh intermediate quantity is the quotient of the third index and the tenth index;

[0726] The 34th index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the 17th index, the thirteenth intermediate quantity is the quotient of the second index and the 17th index, and the fourteenth intermediate quantity is the quotient of the third index and the 17th index;

[0727] The 35th index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index, and the sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0728] The 36th index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index, and the eighteenth intermediate quantity is the quotient of the third index and the eighth index;

[0729] The 37th index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index, and the twentieth intermediate quantity is the quotient of the third index and the ninth index;

[0730] The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index, and the twenty-second intermediate quantity is the quotient of the second index and the fourteenth index.

[0731] The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index, and the twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index.

[0732] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index.

[0733] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0734] Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal.

[0735] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal.

[0736] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal.

[0737] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal.

[0738] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource unit carrying the second target signal and the time-frequency domain resource unit carrying the third target signal.

[0739] The sixth total received power is the linear average of the total received powers on sixth target resources, where the sixth target resources include time-frequency domain resource units carrying a first target signal and time-frequency domain resource units carrying a third target signal;

[0740] The seventh total received power is the linear average of the total received powers on seventh target resources, where the seventh target resources include time-frequency domain resource units carrying a first target signal, time-frequency domain resource units carrying a second target signal, and time-frequency domain resource units carrying a third target signal;

[0741] Wherein, the first target signal is the first signal;

[0742] Or,

[0743] The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path;

[0744] Or,

[0745] The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0746] The sensing device selection apparatus in the embodiments of this application may be an electronic device, such as an electronic device with an operating system, or may be a component in an electronic device, such as an integrated circuit or a chip. This electronic device may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., and the embodiments of this application do not make specific limitations.

[0747] The sensing device selection apparatus provided in the embodiments of this application can implement Figure 7 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, details are not described here again.

[0748] Please refer to Figure 11 , Figure 11 is a structural diagram of a sensing device selection apparatus provided in the embodiments of this application. The backscatter device includes the sensing device selection apparatus. As Figure 11 shown, the sensing device selection apparatus 600 includes:

[0749] A processing module 601, configured to perform signal processing on first signals sent by at least one first signal sender based on first configuration information; the first signals are used to perform first measurements to obtain at least one measurement value of a first target metric;

[0750] At least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

[0751] Optionally, the apparatus further includes:

[0752] a receiving module, configured to receive the first configuration information sent by a first device;

[0753] wherein the first configuration information includes at least one of the following:

[0754] the modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0755] The sensing device selection apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other device other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the above-listed terminal 11, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0756] The sensing device selection apparatus provided in the embodiments of the present application can implement Figure 8 each process implemented by the method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0757] As Figure 12 shown, the embodiments of the present application further provide a communication device 700, including a processor 701 and a memory 702. A program or instruction that can run on the processor 701 is stored on the memory 702. When the program or instruction is executed by the processor 701, it implements each step of the above-described sensing device selection method embodiment and can achieve the same technical effect.

[0758] The embodiments of the present application further provide a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instruction to implement the steps in the method embodiment as Figure 5 , Figure 7 or Figure 8 shown. This terminal embodiment corresponds to the above-described terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically,Figure 13 Schematic diagram of the hardware structure of a terminal according to an embodiment of the present application.

[0759] The terminal 800 includes, but is not limited to, at least some components such as a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810.

[0760] Those skilled in the art can understand that the terminal 800 may further include a power supply (such as a battery) for powering each component. The power supply can be logically connected to the processor 810 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 13 The terminal structure shown does not limit the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0761] It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The graphics processing unit 8041 processes the image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. The other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0762] In the embodiment of the present application, after receiving the downlink data from the network side device, the radio frequency unit 801 can transmit it to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0763] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 809 may include volatile memory or non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 809 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0764] The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 810 either.

[0765] In the case where the terminal is a first device:

[0766] Among them, the processor 810 is used for:

[0767] Obtain at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0768] Determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation based on at least one measurement value of the first target metric.

[0769] Optionally, the processor 810 is further configured to:

[0770] Determine first configuration information for configuring the first measurement;

[0771] Send the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node.

[0772] Optionally, the first configuration information includes at least one of the following:

[0773] Modulation type of the backscatter device; spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; spreading sequence of the backscatter device; time-frequency resources used by the backscatter device for the first measurement; capability information of the backscatter device for the first measurement; manner in which the backscatter device assists the first measurement.

[0774] Optionally, the processor 810 is specifically configured to:

[0775] Determine the first configuration information or the second configuration information based on at least one of the first information, the second information, the third information, and the fourth information;

[0776] Wherein, the first information includes at least one of the following:

[0777] Backscatter device identifier within the sensing area; backscatter device identifier of the sensing target; number of backscatter devices within the sensing area; number of backscatter devices of the sensing target; status information of the backscatter device; sensing capability information of the backscatter device; encryption algorithm type of the backscatter device; channel coding related information of the backscatter device;

[0778] The second information includes at least one of the following:

[0779] Available resource information of the first node; hardware related information of the first node; detection capability indication information of the first node; status information of the first node or the first node;

[0780] The third information includes at least one of the following:

[0781] Measurement value of the first target metric; measurement value of the sensing measurement quantity; sensing result; measurement value of the second target metric;

[0782] The fourth information includes at least one of the following:

[0783] Perceived Quality of Service (QoS); Communication QoS; Perceived prior information.

[0784] Optionally, the obtaining module is configured to:

[0785] Receive at least one measurement value of at least one first target metric sent by at least one first node.

[0786] Optionally, the at least one first target metric includes at least one of the following:

[0787] Metrics related to received power; Metrics related to interference or noise power; Metrics related to both received power and interference or noise power.

[0788] Optionally,

[0789] The metrics related to received power include at least one of the following:

[0790] First metric; Second metric; Third metric;

[0791] Or,

[0792] The metrics related to interference or noise power include at least one of the following:

[0793] Fourth metric; Fifth metric; Sixth metric; Seventh metric; Eighth metric; Ninth metric; Tenth metric; Eleventh metric; Twelfth metric; Thirteenth metric; Fourteenth metric; Fifteenth metric; Sixteenth metric; Seventeenth metric; Eighteenth metric; Nineteenth metric; Twentieth metric;

[0794] Or

[0795] The metrics related to both received power and interference or noise power include at least one of the following:

[0796] Twenty - first metric; Twenty - second metric; Twenty - third metric; Twenty - fourth metric; Twenty - fifth metric; Twenty - sixth metric; Twenty - seventh metric; Twenty - eighth metric; Twenty - ninth metric; Thirtieth metric; Thirty - first metric; Thirty - second metric; Thirty - third metric; Thirty - fourth metric; Thirty - fifth metric; Thirty - sixth metric; Thirty - seventh metric; Thirty - eighth metric; Thirty - ninth metric; Fortieth metric; Forty - first metric;

[0797] Wherein, the first metric is determined based on the linear average value of the received power of the first target path in the channel response obtained by measuring the first target signal on the resource unit carrying the first target signal;

[0798] The second metric is determined based on the linear average value of the received power of the second target path in the channel response obtained by measuring the second target signal on the resource unit carrying the second target signal;

[0799] The third indicator is determined based on the linear average of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0800] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0801] The fourth indicator is determined based on the difference between the first total received power and the first indicator;

[0802] The fifth indicator is determined based on the difference between the second total received power and the second indicator;

[0803] The sixth indicator is determined based on the difference between the third total received power and the third indicator;

[0804] The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator;

[0805] The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator;

[0806] The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator;

[0807] The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0808] The eleventh indicator is determined based on the difference between the first total received power and the received power of the first target signal;

[0809] The twelfth indicator is determined based on the difference between the second total received power and the received power of the second target signal;

[0810] The thirteenth indicator is determined based on the difference between the third total received power and the received power of the third target signal;

[0811] The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the received power of the first target signal and the received power of the second target signal;

[0812] The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the received power of the second target signal and the received power of the third target signal;

[0813] The sixteenth index is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0814] The seventeenth index is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0815] The eighteenth index is determined based on the difference between the first target signal received power and the first index;

[0816] The nineteenth index is determined based on the difference between the second target signal received power and the second index;

[0817] The twentieth index is determined based on the difference between the third target signal received power and the third index;

[0818] The twenty - first index is determined based on the quotient of the first index and the fourth index;

[0819] The twenty - second index is determined based on the quotient of the first index and the eleventh index;

[0820] The twenty - third index is determined based on the quotient of the first index and the eighteenth index;

[0821] The twenty - fourth index is determined based on the quotient of the second index and the fifth index;

[0822] The twenty - fifth index is determined based on the quotient of the second index and the twelfth index;

[0823] The twenty - sixth index is determined based on the quotient of the second index and the nineteenth index;

[0824] The twenty - seventh index is determined based on the quotient of the third index and the sixth index;

[0825] The twenty - eighth index is determined based on the quotient of the third index and the thirteenth index;

[0826] The twenty - ninth index is determined based on the quotient of the third index and the twentieth index;

[0827] The thirtieth index is determined based on the sum of the product of the first coefficient and the twenty - first index, the product of the second coefficient and the twenty - fourth index, and the product of the third coefficient and the twenty - seventh index;

[0828] The thirty - first index is determined based on the sum of the product of the fourth coefficient and the twenty - second index, the product of the fifth coefficient and the twenty - fifth index, and the product of the sixth coefficient and the twenty - eighth index;

[0829] The 32nd index is determined based on the sum of the product of the seventh coefficient and the 23rd index, the product of the eighth coefficient and the 26th index, and the product of the ninth coefficient and the 29th index;

[0830] The 33rd index is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity, where the ninth intermediate quantity is the quotient of the first index and the tenth index, the tenth intermediate quantity is the quotient of the second index and the tenth index, and the eleventh intermediate quantity is the quotient of the third index and the tenth index;

[0831] The 34th index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity, where the twelfth intermediate quantity is the quotient of the first index and the 17th index, the thirteenth intermediate quantity is the quotient of the second index and the 17th index, and the fourteenth intermediate quantity is the quotient of the third index and the 17th index;

[0832] The 35th index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity, where the fifteenth intermediate quantity is the quotient of the first index and the seventh index, and the sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0833] The 36th index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity, where the seventeenth intermediate quantity is the quotient of the second index and the eighth index, and the eighteenth intermediate quantity is the quotient of the third index and the eighth index;

[0834] The 37th index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty - first coefficient and the twentieth intermediate quantity, where the nineteenth intermediate quantity is the quotient of the first index and the ninth index, and the twentieth intermediate quantity is the quotient of the third index and the ninth index;

[0835] The 38th index is determined based on the sum of the product of the twenty - second coefficient and the twenty - first intermediate quantity and the product of the twenty - third coefficient and the twenty - second intermediate quantity, where the twenty - first intermediate quantity is the quotient of the first index and the 14th index, and the twenty - second intermediate quantity is the quotient of the second index and the 14th index;

[0836] The 39th index is determined based on the sum of the product of the twenty - fourth coefficient and the twenty - third intermediate quantity and the product of the twenty - fifth coefficient and the twenty - fourth intermediate quantity, where the twenty - third intermediate quantity is the quotient of the second index and the 15th index, and the twenty - fourth intermediate quantity is the quotient of the third index and the 15th index;

[0837] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index.

[0838] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0839] Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal.

[0840] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal.

[0841] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal.

[0842] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal.

[0843] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource unit carrying the second target signal and the time-frequency domain resource unit carrying the third target signal.

[0844] The sixth total received power is the linear average of the total received power on the sixth target resource, and the sixth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the third target signal.

[0845] The seventh total received power is the linear average of the total received power on the seventh target resource, and the seventh target resource includes the time-frequency domain resource unit carrying the first target signal, the time-frequency domain resource unit carrying the second target signal, and the time-frequency domain resource unit carrying the third target signal.

[0846] Wherein, the first target signal is the first signal.

[0847] Or,

[0848] the second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path;

[0849] Or,

[0850] the third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0851] Optionally, the first device is a node device among the at least one first signal sender.

[0852] When the terminal is the first node:

[0853] wherein, the processor 810 is configured to:

[0854] perform a first measurement based on the first signals sent by at least one first signal sender to obtain at least one measurement value of a first target metric, where the first signals are backscattered and transmitted from the first signal sender to the first node via at least one backscatter device;

[0855] send at least one measurement value of the first target metric to the first device, and the at least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing the sensing operation.

[0856] Optionally, the processor 810 is further configured to:

[0857] perform a first measurement based on the first configuration information and the first signals sent by at least one first signal sender, where the first configuration information is used to configure the first measurement.

[0858] Optionally, the first configuration information includes at least one of the following:

[0859] the modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources of the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0860] Optionally, the first target metric includes at least one of the following:

[0861] metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

[0862] Optionally,

[0863] The metrics related to the received power include at least one of the following:

[0864] The first metric; the second metric; the third metric;

[0865] Or

[0866] The metrics related to the interference or noise power include at least one of the following:

[0867] The fourth metric; the fifth metric; the sixth metric; the seventh metric; the eighth metric; the ninth metric; the tenth metric; the eleventh metric; the twelfth metric; the thirteenth metric; the fourteenth metric; the fifteenth metric; the sixteenth metric; the seventeenth metric; the eighteenth metric; the nineteenth metric; the twentieth metric;

[0868] Or

[0869] The metrics related to both the received power and the interference or noise power include at least one of the following:

[0870] The twenty - first metric; the twenty - second metric; the twenty - third metric; the twenty - fourth metric; the twenty - fifth metric; the twenty - sixth metric; the twenty - seventh metric; the twenty - eighth metric; the twenty - ninth metric; the thirtieth metric; the thirty - first metric; the thirty - second metric; the thirty - third metric; the thirty - fourth metric; the thirty - fifth metric; the thirty - sixth metric; the thirty - seventh metric; the thirty - eighth metric; the thirty - ninth metric; the fortieth metric; the forty - first metric;

[0871] Among them, the first metric is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal;

[0872] The second metric is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal;

[0873] The third metric is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal;

[0874] The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation;

[0875] The fourth metric is determined based on the difference between the first total received power and the first metric;

[0876] The fifth indicator is determined based on the difference between the second total received power and the second indicator;

[0877] The sixth indicator is determined based on the difference between the third total received power and the third indicator;

[0878] The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator;

[0879] The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator;

[0880] The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator;

[0881] The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator;

[0882] The eleventh indicator is determined based on the difference between the first total received power and the first target signal received power;

[0883] The twelfth indicator is determined based on the difference between the second total received power and the second target signal received power;

[0884] The thirteenth indicator is determined based on the difference between the third total received power and the third target signal received power;

[0885] The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the first target signal received power and the second target signal received power;

[0886] The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power;

[0887] The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power;

[0888] The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power;

[0889] The eighteenth indicator is determined based on the difference between the first target signal received power and the first indicator;

[0890] The nineteenth indicator is determined based on the difference between the second target signal reception power and the second indicator;

[0891] The twentieth indicator is determined based on the difference between the third target signal reception power and the third indicator;

[0892] The twenty-first indicator is determined based on the quotient of the first indicator and the fourth indicator;

[0893] The twenty-second indicator is determined based on the quotient of the first indicator and the eleventh indicator;

[0894] The twenty-third indicator is determined based on the quotient of the first indicator and the eighteenth indicator;

[0895] The twenty-fourth indicator is determined based on the quotient of the second indicator and the fifth indicator;

[0896] The twenty-fifth indicator is determined based on the quotient of the second indicator and the twelfth indicator;

[0897] The twenty-sixth indicator is determined based on the quotient of the second indicator and the nineteenth indicator;

[0898] The twenty-seventh indicator is determined based on the quotient of the third indicator and the sixth indicator;

[0899] The twenty-eighth indicator is determined based on the quotient of the third indicator and the thirteenth indicator;

[0900] The twenty-ninth indicator is determined based on the quotient of the third indicator and the twentieth indicator;

[0901] The thirtieth indicator is determined based on the sum of the product of the first coefficient and the twenty-first indicator, the product of the second coefficient and the twenty-fourth indicator, and the product of the third coefficient and the twenty-seventh indicator;

[0902] The thirty-first indicator is determined based on the sum of the product of the fourth coefficient and the twenty-second indicator, the product of the fifth coefficient and the twenty-fifth indicator, and the product of the sixth coefficient and the twenty-eighth indicator;

[0903] The thirty-second indicator is determined based on the sum of the product of the seventh coefficient and the twenty-third indicator, the product of the eighth coefficient and the twenty-sixth indicator, and the product of the ninth coefficient and the twenty-ninth indicator;

[0904] The thirty-third indicator is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity. The ninth intermediate quantity is the quotient of the first indicator and the tenth indicator, the tenth intermediate quantity is the quotient of the second indicator and the tenth indicator, and the eleventh intermediate quantity is the quotient of the third indicator and the tenth indicator;

[0905] The thirty-fourth index is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity. The twelfth intermediate quantity is the quotient of the first index and the seventeenth index. The thirteenth intermediate quantity is the quotient of the second index and the seventeenth index. The fourteenth intermediate quantity is the quotient of the third index and the seventeenth index;

[0906] The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index. The sixteenth intermediate quantity is the quotient of the second index and the seventh index;

[0907] The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index. The eighteenth intermediate quantity is the quotient of the third index and the eighth index;

[0908] The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index. The twentieth intermediate quantity is the quotient of the third index and the ninth index;

[0909] The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index. The twenty-second intermediate quantity is the quotient of the second index and the fourteenth index;

[0910] The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index. The twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index;

[0911] The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index. The twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index;

[0912] The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index. The twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index. The twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index.

[0913] Among them, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal.

[0914] The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal.

[0915] The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal.

[0916] The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal.

[0917] The fifth total received power is the linear average of the total received power on the fifth target resource, and the fifth target resource includes the time-frequency domain resource unit carrying the second target signal and the time-frequency domain resource unit carrying the third target signal.

[0918] The sixth total received power is the linear average of the total received power on the sixth target resource, and the sixth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the third target signal.

[0919] The seventh total received power is the linear average of the total received power on the seventh target resource, and the seventh target resource includes the time-frequency domain resource unit carrying the first target signal, the time-frequency domain resource unit carrying the second target signal, and the time-frequency domain resource unit carrying the third target signal.

[0920] Among them, the first target signal is the first signal.

[0921] Or,

[0922] The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path.

[0923] Or,

[0924] The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

[0925] When the terminal is a backscatter device:

[0926] Wherein, the processor 810 is configured to:

[0927] Perform signal processing on the first signals sent by at least one first signal sender based on first configuration information; the first signals are used to perform first measurements to obtain at least one measurement value of a first target metric;

[0928] At least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing a sensing operation.

[0929] Optionally, the radio frequency unit 801 is configured to:

[0930] Receive the first configuration information sent by the first device;

[0931] Wherein, the first configuration information includes at least one of the following:

[0932] The modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

[0933] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to the relevant descriptions of the method embodiments Figure 5 、 Figure 7 or Figure 8 and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0934] This application embodiment also provides a network-side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement as Figure 5 、 Figure 7 or Figure 8 shown in the steps of the method embodiment. This network-side device embodiment corresponds to the above network-side device method embodiment. The implementation processes and implementation manners of the above method embodiments can all be applied to this network-side device embodiment, and the same technical effects can be achieved.

[0935] Specifically, this application embodiment also provides a network-side device. As Figure 14As shown, the network side device 900 includes: an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94 and a memory 95. The antenna 91 is connected to the radio frequency device 92. In the uplink direction, the radio frequency device 92 receives information through the antenna 91 and sends the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes the information to be sent and sends it to the radio frequency device 92. The radio frequency device 92 processes the received information and sends it out through the antenna 91.

[0936] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 93, which includes a baseband processor.

[0937] The baseband device 93 may include, for example, at least one baseband board on which a plurality of chips are arranged. Figure 14 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call the program in the memory 95 to execute the network device operations shown in the above method embodiment.

[0938] The network side device may further include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).

[0939] Specifically, the network side device 900 of the embodiment of the present application further includes: instructions or programs stored in the memory 95 and executable on the processor 94, and the processor 94 calls the instructions or programs in the memory 95 to execute. Figure 9 , Figure 10 or Figure 11 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0940] Specifically, the embodiment of the present application also provides a network side device. Figure 15 As shown, the network side device 1000 includes: a processor 1001, a network interface 1002 and a memory 1003. The network interface 1002 is, for example, a common public radio interface (CPRI).

[0941] Specifically, the network side device 1000 of the embodiment of the present invention further includes: an instruction or program stored in the memory 1003 and executable on the processor 1001, and the processor 1001 calls the instruction or program in the memory 1003 to execute Figure 9 , Figure 10 or Figure 11 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0942] An embodiment of the present application further provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the sensing device selection method is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0943] Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk, or an optical disc, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0944] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement each process of the above-mentioned embodiment of the sensing device selection method, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0945] It should be understood that the chip mentioned in the embodiment of the present application may also be referred to as a system-on-chip, a system chip, a chip system, or a system-on-chip, etc.

[0946] Another embodiment of the present application provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the above-mentioned embodiment of the sensing device selection method, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0947] An embodiment of the present application further provides a sensing device selection system, including: a first node, a first sensing node, and a second sensing node. The first node can be used to execute the steps of the sensing device selection method applied to the first node as described above. The first sensing node can be used to execute the steps of the sensing device selection method applied to the first sensing node as described above. The second sensing node can be used to execute the steps of the sensing device selection method applied to the second sensing node as described above.

[0948] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0949] From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0950] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the purpose of the present application and the scope protected by the claims, can also make many forms of embodiments, and these embodiments are all within the protection scope of the present application.

Claims

1. A method for selecting a sensing device, characterized in that, Including: A first device obtains at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node through a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node through at least one backscatter device; The first device determines at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation based on the at least one measurement value of the first target metric.

2. The method according to claim 1, wherein Before the first device obtains the at least one measurement value of the first target metric, the method further includes: The first device determines first configuration information for configuring the first measurement; The first device sends the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node.

3. The method according to claim 2, wherein The first configuration information includes at least one of the following: Modulation type of the backscatter device; spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; spreading sequence of the backscatter device; time-frequency resources used by the backscatter device for the first measurement; capability information of the backscatter device for the first measurement; manner in which the backscatter device assists the first measurement.

4. The method according to claim 2 or 3, characterized in that The first device determines the first configuration information, including: The first device determines the first configuration information or the second configuration information based on at least one of first information, second information, third information, and fourth information; Wherein, the first information includes at least one of the following: Backscatter device identifier within the sensing area; backscatter device identifier of the sensing target; number of backscatter devices within the sensing area; number of backscatter devices of the sensing target; status information of the backscatter device; sensing capability information of the backscatter device; encryption algorithm type of the backscatter device; channel coding related information of the backscatter device; The second information includes at least one of the following: Available resource information of the first node; hardware related information of the first node; detection capability indication information of the first node; status information of the first node or the first node; The third information includes at least one of the following: Measurement value of the first target metric; measurement value of the sensing measurement quantity; sensing result; measurement value of the second target metric; The fourth information includes at least one of the following: Sensing quality of service QoS; communication QoS; sensing prior information.

5. The method according to any one of claims 1 to 4, characterized in that, The first device obtains the at least one measurement value of the first target metric, including: The first device receives the at least one measurement value of the first target metric sent by at least one first node.

6. The method according to any one of claims 1-5, characterized in that, The first target metric includes at least one of the following: Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

7. The method according to claim 6, wherein The metrics related to received power include at least one of the following: First metric; second metric; third metric; Or, The metrics related to interference or noise power include at least one of the following: The fourth indicator; The fifth indicator; The sixth indicator; The seventh indicator; The eighth indicator; The ninth indicator; The tenth indicator; The eleventh indicator; The twelfth indicator; The thirteenth indicator; The fourteenth indicator; The fifteenth indicator; The sixteenth indicator; The seventeenth indicator; The eighteenth indicator; The nineteenth indicator; The twentieth indicator; or The indicators related to both the received power and the interference or noise power include at least one of the following: The twenty - first indicator; The twenty - second indicator; The twenty - third indicator; The twenty - fourth indicator; The twenty - fifth indicator; The twenty - sixth indicator; The twenty - seventh indicator; The twenty - eighth indicator; The twenty - ninth indicator; The thirtieth indicator; The thirty - first indicator; The thirty - second indicator; The thirty - third indicator; The thirty - fourth indicator; The thirty - fifth indicator; The thirty - sixth indicator; The thirty - seventh indicator; The thirty - eighth indicator; The thirty - ninth indicator; The fortieth indicator; The forty - first indicator; Among them, the first indicator is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal; The second indicator is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal; The third indicator is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal; The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation; The fourth indicator is determined based on the difference between the first total received power and the first indicator; The fifth indicator is determined based on the difference between the second total received power and the second indicator; The sixth indicator is determined based on the difference between the third total received power and the third indicator; The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, and the first intermediate quantity is the sum of the first indicator and the second indicator; The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, and the second intermediate quantity is the sum of the second indicator and the third indicator; The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, and the third intermediate quantity is the sum of the first indicator and the third indicator; The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, and the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator; The eleventh indicator is determined based on the difference between the first total received power and the received power of the first target signal; The twelfth indicator is determined based on the difference between the second total received power and the received power of the second target signal; The thirteenth indicator is determined based on the difference between the third total received power and the received power of the third target signal; The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, and the fifth intermediate quantity is the sum of the received power of the first target signal and the received power of the second target signal; The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power; The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power; The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power; The eighteenth indicator is determined based on the difference between the first target signal received power and the first indicator; The nineteenth indicator is determined based on the difference between the second target signal received power and the second indicator; The twentieth indicator is determined based on the difference between the third target signal received power and the third indicator; The twenty - first indicator is determined based on the quotient of the first indicator and the fourth indicator; The twenty - second indicator is determined based on the quotient of the first indicator and the eleventh indicator; The twenty - third indicator is determined based on the quotient of the first indicator and the eighteenth indicator; The twenty - fourth indicator is determined based on the quotient of the second indicator and the fifth indicator; The twenty - fifth indicator is determined based on the quotient of the second indicator and the twelfth indicator; The twenty - sixth indicator is determined based on the quotient of the second indicator and the nineteenth indicator; The twenty - seventh indicator is determined based on the quotient of the third indicator and the sixth indicator; The twenty - eighth indicator is determined based on the quotient of the third indicator and the thirteenth indicator; The twenty - ninth indicator is determined based on the quotient of the third indicator and the twentieth indicator; The thirtieth indicator is determined based on the sum of the product of the first coefficient and the twenty - first indicator, the product of the second coefficient and the twenty - fourth indicator, and the product of the third coefficient and the twenty - seventh indicator; The thirty - first indicator is determined based on the sum of the product of the fourth coefficient and the twenty - second indicator, the product of the fifth coefficient and the twenty - fifth indicator, and the product of the sixth coefficient and the twenty - eighth indicator; The thirty - second indicator is determined based on the sum of the product of the seventh coefficient and the twenty - third indicator, the product of the eighth coefficient and the twenty - sixth indicator, and the product of the ninth coefficient and the twenty - ninth indicator; The thirty - third indicator is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity, where the ninth intermediate quantity is the quotient of the first indicator and the tenth indicator, the tenth intermediate quantity is the quotient of the second indicator and the tenth indicator, and the eleventh intermediate quantity is the quotient of the third indicator and the tenth indicator; The thirty - fourth indicator is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity, where the twelfth intermediate quantity is the quotient of the first indicator and the seventeenth indicator, the thirteenth intermediate quantity is the quotient of the second indicator and the seventeenth indicator, and the fourteenth intermediate quantity is the quotient of the third indicator and the seventeenth indicator; The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index, and the sixteenth intermediate quantity is the quotient of the second index and the seventh index; The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index, and the eighteenth intermediate quantity is the quotient of the third index and the eighth index; The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index, and the twentieth intermediate quantity is the quotient of the third index and the ninth index; The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index, and the twenty-second intermediate quantity is the quotient of the second index and the fourteenth index; The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index, and the twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index; The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index; The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index; Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal; The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal; The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal; The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal; The fifth total received power is the linear average of the total received powers on fifth target resources, where the fifth target resources include time-frequency domain resource units carrying a second target signal and time-frequency domain resource units carrying a third target signal; The sixth total received power is the linear average of the total received powers on sixth target resources, where the sixth target resources include time-frequency domain resource units carrying a first target signal and time-frequency domain resource units carrying a third target signal; The seventh total received power is the linear average of the total received powers on seventh target resources, where the seventh target resources include time-frequency domain resource units carrying a first target signal, time-frequency domain resource units carrying a second target signal, and time-frequency domain resource units carrying a third target signal; Wherein, the first target signal is the first signal; Or, The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path; Or, The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

8. The method according to any one of claims 1-7, characterized in that, The first device is a node device among the at least one first signal sender.

9. A method for selecting a sensing device, characterized in that Including: A first node performs a first measurement based on a first signal sent by at least one first signal sender to obtain at least one measurement value of a first target metric, where the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device; The first node sends at least one measurement value of the first target metric to a first device, and the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

10. The method according to claim 9, characterized in that, The first node performing a first measurement based on a first signal sent by at least one first signal sender includes: The first node performs a first measurement based on first configuration information and a first signal sent by at least one first signal sender, and the first configuration information is used to configure the first measurement.

11. The method according to claim 10, characterized in that, The first configuration information includes at least one of the following: The modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the way the backscatter device assists the first measurement.

12. The method according to any one of claims 9 - 11, characterized in that, The first target metric includes at least one of the following: Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

13. The method according to claim 12, wherein The metrics related to received power include at least one of the following: A first metric; a second metric; a third metric; Or, The metrics related to interference or noise power include at least one of the following: Fourth indicator; Fifth indicator; Sixth indicator; Seventh indicator; Eighth indicator; Ninth indicator; Tenth indicator; Eleventh indicator; Twelfth indicator; Thirteenth indicator; Fourteenth indicator; Fifteenth indicator; Sixteenth indicator; Seventeenth indicator; Eighteenth indicator; Nineteenth indicator; Twentieth indicator; or The indicators related to both the received power and the interference or noise power include at least one of the following: Twenty - first indicator; Twenty - second indicator; Twenty - third indicator; Twenty - fourth indicator; Twenty - fifth indicator; Twenty - sixth indicator; Twenty - seventh indicator; Twenty - eighth indicator; Twenty - ninth indicator; Thirtieth indicator; Thirty - first indicator; Thirty - second indicator; Thirty - third indicator; Thirty - fourth indicator; Thirty - fifth indicator; Thirty - sixth indicator; Thirty - seventh indicator; Thirty - eighth indicator; Thirty - ninth indicator; Fortieth indicator; Forty - first indicator; Among them, the first indicator is determined based on the linear average value of the received power of the first target path in the channel response measured for the first target signal on the resource unit carrying the first target signal; The second indicator is determined based on the linear average value of the received power of the second target path in the channel response measured for the second target signal on the resource unit carrying the second target signal; The third indicator is determined based on the linear average value of the received power of the third target path in the channel response measured for the third target signal on the resource unit carrying the third target signal; The first target path is the path associated with the sensing target, the second target path is the path associated with both the sensing target and the backscatter device performing the sensing operation, and the third target path is the path associated with the backscatter device performing the sensing operation; The fourth indicator is determined based on the difference between the first total received power and the first indicator; The fifth indicator is determined based on the difference between the second total received power and the second indicator; The sixth indicator is determined based on the difference between the third total received power and the third indicator; The seventh indicator is determined based on the difference between the fourth total received power and the first intermediate quantity, where the first intermediate quantity is the sum of the first indicator and the second indicator; The eighth indicator is determined based on the difference between the fifth total received power and the second intermediate quantity, where the second intermediate quantity is the sum of the second indicator and the third indicator; The ninth indicator is determined based on the difference between the sixth total received power and the third intermediate quantity, where the third intermediate quantity is the sum of the first indicator and the third indicator; The tenth indicator is determined based on the difference between the seventh total received power and the fourth intermediate quantity, where the fourth intermediate quantity is the sum of the first indicator, the second indicator, and the third indicator; The eleventh indicator is determined based on the difference between the first total received power and the received power of the first target signal; The twelfth indicator is determined based on the difference between the second total received power and the received power of the second target signal; The thirteenth indicator is determined based on the difference between the third total received power and the received power of the third target signal; The fourteenth indicator is determined based on the difference between the fourth total received power and the fifth intermediate quantity, where the fifth intermediate quantity is the sum of the received power of the first target signal and the received power of the second target signal; The fifteenth indicator is determined based on the difference between the fifth total received power and the sixth intermediate quantity, where the sixth intermediate quantity is the sum of the second target signal received power and the third target signal received power; The sixteenth indicator is determined based on the difference between the sixth total received power and the seventh intermediate quantity, where the seventh intermediate quantity is the sum of the first target signal received power and the third target signal received power; The seventeenth indicator is determined based on the difference between the seventh total received power and the eighth intermediate quantity, where the eighth intermediate quantity is the sum of the first target signal received power, the second target signal received power, and the third target signal received power; The eighteenth indicator is determined based on the difference between the first target signal received power and the first indicator; The nineteenth indicator is determined based on the difference between the second target signal received power and the second indicator; The twentieth indicator is determined based on the difference between the third target signal received power and the third indicator; The twenty - first indicator is determined based on the quotient of the first indicator and the fourth indicator; The twenty - second indicator is determined based on the quotient of the first indicator and the eleventh indicator; The twenty - third indicator is determined based on the quotient of the first indicator and the eighteenth indicator; The twenty - fourth indicator is determined based on the quotient of the second indicator and the fifth indicator; The twenty - fifth indicator is determined based on the quotient of the second indicator and the twelfth indicator; The twenty - sixth indicator is determined based on the quotient of the second indicator and the nineteenth indicator; The twenty - seventh indicator is determined based on the quotient of the third indicator and the sixth indicator; The twenty - eighth indicator is determined based on the quotient of the third indicator and the thirteenth indicator; The twenty - ninth indicator is determined based on the quotient of the third indicator and the twentieth indicator; The thirtieth indicator is determined based on the sum of the product of the first coefficient and the twenty - first indicator, the product of the second coefficient and the twenty - fourth indicator, and the product of the third coefficient and the twenty - seventh indicator; The thirty - first indicator is determined based on the sum of the product of the fourth coefficient and the twenty - second indicator, the product of the fifth coefficient and the twenty - fifth indicator, and the product of the sixth coefficient and the twenty - eighth indicator; The thirty - second indicator is determined based on the sum of the product of the seventh coefficient and the twenty - third indicator, the product of the eighth coefficient and the twenty - sixth indicator, and the product of the ninth coefficient and the twenty - ninth indicator; The thirty - third indicator is determined based on the sum of the product of the tenth coefficient and the ninth intermediate quantity, the product of the eleventh coefficient and the tenth intermediate quantity, and the product of the twelfth coefficient and the eleventh intermediate quantity, where the ninth intermediate quantity is the quotient of the first indicator and the tenth indicator, the tenth intermediate quantity is the quotient of the second indicator and the tenth indicator, and the eleventh intermediate quantity is the quotient of the third indicator and the tenth indicator; The thirty - fourth indicator is determined based on the sum of the product of the thirteenth coefficient and the twelfth intermediate quantity, the product of the fourteenth coefficient and the thirteenth intermediate quantity, and the product of the fifteenth coefficient and the fourteenth intermediate quantity, where the twelfth intermediate quantity is the quotient of the first indicator and the seventeenth indicator, the thirteenth intermediate quantity is the quotient of the second indicator and the seventeenth indicator, and the fourteenth intermediate quantity is the quotient of the third indicator and the seventeenth indicator; The thirty-fifth index is determined based on the sum of the product of the sixteenth coefficient and the fifteenth intermediate quantity and the product of the seventeenth coefficient and the sixteenth intermediate quantity. The fifteenth intermediate quantity is the quotient of the first index and the seventh index, and the sixteenth intermediate quantity is the quotient of the second index and the seventh index; The thirty-sixth index is determined based on the sum of the product of the eighteenth coefficient and the seventeenth intermediate quantity and the product of the nineteenth coefficient and the eighteenth intermediate quantity. The seventeenth intermediate quantity is the quotient of the second index and the eighth index, and the eighteenth intermediate quantity is the quotient of the third index and the eighth index; The thirty-seventh index is determined based on the sum of the product of the twentieth coefficient and the nineteenth intermediate quantity and the product of the twenty-first coefficient and the twentieth intermediate quantity. The nineteenth intermediate quantity is the quotient of the first index and the ninth index, and the twentieth intermediate quantity is the quotient of the third index and the ninth index; The thirty-eighth index is determined based on the sum of the product of the twenty-second coefficient and the twenty-first intermediate quantity and the product of the twenty-third coefficient and the twenty-second intermediate quantity. The twenty-first intermediate quantity is the quotient of the first index and the fourteenth index, and the twenty-second intermediate quantity is the quotient of the second index and the fourteenth index; The thirty-ninth index is determined based on the sum of the product of the twenty-fourth coefficient and the twenty-third intermediate quantity and the product of the twenty-fifth coefficient and the twenty-fourth intermediate quantity. The twenty-third intermediate quantity is the quotient of the second index and the fifteenth index, and the twenty-fourth intermediate quantity is the quotient of the third index and the fifteenth index; The fortieth index is determined based on the sum of the product of the twenty-sixth coefficient and the twenty-fifth intermediate quantity and the product of the twenty-seventh coefficient and the twenty-sixth intermediate quantity. The twenty-fifth intermediate quantity is the quotient of the first index and the sixteenth index, and the twenty-sixth intermediate quantity is the quotient of the third index and the sixteenth index; The forty-first index is determined based on the sum of the product of the twenty-eighth coefficient and the twenty-seventh intermediate quantity, the product of the twenty-ninth coefficient and the twenty-eighth intermediate quantity, and the product of the thirtieth coefficient and the twenty-ninth intermediate quantity. The twenty-seventh intermediate quantity is the quotient of the first index and the eighteenth index, the twenty-eighth intermediate quantity is the quotient of the second index and the nineteenth index, and the twenty-ninth intermediate quantity is the quotient of the third index and the twentieth index; Wherein, the first total received power is the linear average of the total received power on the first target resource, and the first target resource is the time-frequency domain resource unit carrying the first target signal; The second total received power is the linear average of the total received power on the second target resource, and the second target resource is the time-frequency domain resource unit carrying the second target signal; The third total received power is the linear average of the total received power on the third target resource, and the third target resource is the time-frequency domain resource unit carrying the third target signal; The fourth total received power is the linear average of the total received power on the fourth target resource, and the fourth target resource includes the time-frequency domain resource unit carrying the first target signal and the time-frequency domain resource unit carrying the second target signal; The fifth total received power is the linear average of the total received powers on fifth target resources, where the fifth target resources include time-frequency domain resource units carrying a second target signal and time-frequency domain resource units carrying a third target signal; The sixth total received power is the linear average of the total received powers on sixth target resources, where the sixth target resources include time-frequency domain resource units carrying a first target signal and time-frequency domain resource units carrying a third target signal; The seventh total received power is the linear average of the total received powers on seventh target resources, where the seventh target resources include time-frequency domain resource units carrying a first target signal, time-frequency domain resource units carrying a second target signal, and time-frequency domain resource units carrying a third target signal; Wherein, the first target signal is the first signal; Or, The second target signal is the first signal, or the second target signal is the signal after the first target signal propagates through the second target path; Or, The third target signal is the first signal, or the third target signal is the signal after the first target signal propagates through the third target path.

14. A method for selecting a sensing device, characterized in that Including: The backscatter device processes the first signal sent by at least one first signal sender based on first configuration information; The first signal is used to perform a first measurement to obtain at least one measurement value of a first target metric; At least one measurement value of the first target metric is used to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing a sensing operation.

15. The method according to claim 14, characterized in that, The method further includes: The backscatter device receives the first configuration information sent by the first device; Wherein, the first configuration information includes at least one of the following: The modulation type of the backscatter device; the spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; the spreading sequence of the backscatter device; the time-frequency resources used by the backscatter device for the first measurement; the capability information of the backscatter device for the first measurement; the manner in which the backscatter device assists the first measurement.

16. A sensing device selection apparatus, the first device includes the sensing device selection apparatus, characterized in that, Including: An acquisition module, configured to acquire at least one measurement value of a first target metric, where the at least one measurement value is a measurement value obtained by at least one first node performing a first measurement based on a first signal sent by at least one first signal sender, and the first signal is backscattered and transmitted from the first signal sender to the first node via at least one backscatter device; A first determination module, configured to determine at least one of the first signal sender, the first signal receiver, and the target backscatter device for performing a sensing operation based on at least one measurement value of the first target metric.

17. The device according to claim 16, characterized in that, The apparatus further includes: A second determination module, configured to determine first configuration information, where the first configuration information is used to configure the first measurement; A sending module, configured to send the first configuration information to the at least one backscatter device; or the first device sends the first configuration information to the at least one first node.

18. The device according to claim 17, characterized in that, The first configuration information includes at least one of the following: Modulation type of the backscatter device; spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; spreading sequence of the backscatter device; time-frequency resources used by the backscatter device for the first measurement; capability information of the backscatter device for the first measurement; manner in which the backscatter device assists the first measurement.

19. The device according to claim 17 or 18, characterized in that, The second determination module is specifically configured to: Determine the first configuration information or the second configuration information based on at least one of the first information, the second information, the third information, and the fourth information; Wherein, the first information includes at least one of the following: Backscatter device identifier within the sensing area; backscatter device identifier of the sensing target; number of backscatter devices within the sensing area; number of backscatter devices of the sensing target; status information of the backscatter device; sensing capability information of the backscatter device; encryption algorithm type of the backscatter device; channel coding related information of the backscatter device; The second information includes at least one of the following: Available resource information of the first node; hardware related information of the first node; detection capability indication information of the first node; status information of the first node or the first node; The third information includes at least one of the following: Measurement value of the first target metric; measurement value of the sensing measurement quantity; sensing result; measurement value of the second target metric; The fourth information includes at least one of the following: Sensing quality of service QoS; communication QoS; sensing prior information.

20. A sensing device selection apparatus, the first node includes the sensing device selection apparatus, characterized in that, Includes: An acquisition module, configured to perform a first measurement based on a first signal sent by at least one first signal sender, and acquire at least one measurement value of a first target metric, where the first signal is backscattered from the first signal sender through at least one backscatter device and transmitted to the first node; A sending module, configured to send at least one measurement value of the first target metric to a first device, where the at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

21. The device according to claim 20, wherein, The acquisition module is specifically configured to: Perform a first measurement based on the first configuration information and a first signal sent by at least one first signal sender, where the first configuration information is used to configure the first measurement.

22. The device according to claim 20 or 21, characterized in that, The first target metric includes at least one of the following: Metrics related to received power; metrics related to interference or noise power; metrics related to both received power and interference or noise power.

23. A sensing device selection apparatus, the backscatter device including the sensing device selection apparatus, characterized in that, Includes: A processing module, configured to perform signal processing on a first signal sent by at least one first signal sender based on the first configuration information; The first signal is used to perform a first measurement to obtain at least one measurement value of a first target metric; The at least one measurement value of the first target metric is used to determine at least one of a first signal sender, a first signal receiver, and a target backscatter device for performing a sensing operation.

24. The device according to claim 23, wherein The apparatus further includes: A receiving module, configured to receive the first configuration information sent by the first device; Wherein, the first configuration information includes at least one of the following: Modulation type of the backscatter device; spreading factor or modulation rate or reverse link frequency modulated by the backscatter device; spreading sequence of the backscatter device; time-frequency resources used by the backscatter device for the first measurement; capability information of the backscatter device for the first measurement; manner in which the backscatter device assists the first measurement.

25. A communication device, characterized in that, Comprising a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the steps of the sensing device selection method according to any one of claims 1-8 are implemented, or the steps of the sensing device selection method according to any one of claims 9-13 are implemented, or the steps of the sensing device selection method according to any one of claims 14-15 are implemented.

26. A chip, characterized in that, The chip comprises a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the sensing device selection method according to any one of claims 1-8, or the steps of the sensing device selection method according to any one of claims 9-13, or the steps of the sensing device selection method according to any one of claims 14-15.

27. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps of the sensing device selection method according to any one of claims 1-8 are implemented, or the steps of the sensing device selection method according to any one of claims 9-13 are implemented, or the steps of the sensing device selection method according to any one of claims 14-15 are implemented.

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