Sensing processing method, terminal, and network-side device

Abstract

The present application belongs to the technical field of communications and discloses a sensing processing method, a terminal, and a network-side device. The sensing processing method in embodiments of the present application comprises: a first device acquires first configuration information and first information, the first configuration information being used for configuring a sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, N1 being greater than or equal to N2, M1 being greater than or equal to M2, N1*M1 being greater than N2*M2, N2 being the minimum number of sensing subcarriers that meets the requirements for the resolution and maximum unambiguous measurement range of a delay, and M2 being the minimum number of sensing OFDM symbols that meets the requirements for the resolution and maximum unambiguous measurement range of Doppler; on the basis of the first information, the first device performs target transformation on a sensing signal received by the first device to obtain a target spectrum; and the first device sends first data to a second device, the first data being determined on the basis of the target spectrum.

Description

Sensing processing methods, terminals and network-side equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411717365.6, filed on November 27, 2024, entitled "Sensing Processing Method, Terminal and Network Side Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, specifically relating to a sensing processing method, a terminal, and a network-side device. Background Technology

[0004] With the development of communication technology, passive object measurement and sensing can be performed in communication systems based on sensing signals or integrated sensing signals. Currently, to achieve the sensing of small or distant targets, it is necessary to improve the coherent accumulation gain of the sensing signal. However, improving the coherent accumulation gain significantly increases the reporting overhead of the sensing measurements. Therefore, how to improve the coherent accumulation gain while avoiding increasing the reporting overhead of the sensing measurements has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a sensing processing method, a terminal, and a network-side device, which can solve the problem of increasing the coherent accumulation gain while avoiding increasing the reporting overhead of sensing measurements.

[0006] Firstly, a perception processing method is provided, including:

[0007] The first device acquires first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0008] The first device performs target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0009] The first device sends first data to the second device, the first data being determined based on the target spectrum;

[0010] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0011] Secondly, a perception processing method is provided, including:

[0012] The second device sends first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain.

[0013] The second device receives first data from the first device, the first data being determined based on the target spectrum obtained by the target transformation;

[0014] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0015] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0016] Thirdly, a sensing processing device is provided, comprising:

[0017] The first receiving module is used to acquire first configuration information and first information, wherein the first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols;

[0018] The first processing module is used to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0019] A first transmitting module is used to transmit first data to a second device, wherein the first data is determined based on the target spectrum;

[0020] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0021] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0022] Fourthly, a sensing processing device is provided, comprising:

[0023] The second transmitting module is used to transmit first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; and performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain.

[0024] The second receiving module is configured to receive first data from the first device, wherein the first data is determined based on the target spectrum obtained by the target transformation.

[0025] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0026] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0027] Fifthly, a sensing processing apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0028] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect, or implementing the steps of the method as described in the second aspect.

[0029] Seventhly, a terminal is provided, including a processor and a communication interface, wherein,

[0030] The communication interface is used to acquire first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0031] A processor is configured to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0032] The communication interface is also used to send first data to the second device, the first data being determined based on the target spectrum;

[0033] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0034] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0035] Ninthly, a network-side device is provided, including a processor and a communication interface, wherein,

[0036] When the network-side device is the first device, the communication interface is used to acquire first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0037] A processor is configured to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0038] The communication interface is also used to send first data to the second device, the first data being determined based on the target spectrum;

[0039] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0040] When the network-side device is a second device, the communication interface is used to send first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of a target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain; and receiving first data from the first device, wherein the first data is determined based on the target spectrum obtained by the target transformation.

[0041] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0042] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0043] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0044] Eleventhly, a wireless communication system is provided, comprising: a first device and a second device, wherein the first device is configured to perform the steps of the method as described in the first aspect, and the second device is configured to perform the steps of the method as described in the second aspect.

[0045] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0046] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0047] In this embodiment, a first device acquires first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first device performs target transformation on the sensing signal received by the first device based on the first information to obtain the target spectrum. The target transform includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain; the first device sends first data to the second device, the first data being determined based on the target spectrum; wherein the first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3, and M is less than M3. Thus, by configuring N1*M1 to be greater than N2*M2 to achieve redundant configuration of the sensing signal and improve the coherent accumulation gain of the sensing signal, while simultaneously determining that N is less than N3 and M is less than M3 in the first data based on the target spectrum, redundant reporting is achieved, reducing reporting overhead. Therefore, the embodiments of this application can improve the coherent accumulation gain while avoiding increasing the reporting overhead of the sensed measurement. Attached Figure Description

[0048] Figure 1 is a block diagram of a wireless communication system applicable to an embodiment of this application;

[0049] Figure 2 is an example diagram of a perception scenario to which the embodiments of this application can be applied;

[0050] Figures 3a to 3d are example diagrams of the configuration of the sensing signal;

[0051] Figure 4 is a flowchart illustrating a sensing processing method provided in an embodiment of this application;

[0052] Figure 5 is an example of the capture of N time delay units in a sensing processing method provided in an embodiment of this application;

[0053] Figure 6 is an example of the capture of M Doppler units in a sensing processing method provided in an embodiment of this application;

[0054] Figure 7 is a flowchart illustrating another sensing processing method provided in an embodiment of this application;

[0055] Figure 8 is a schematic diagram of a sensing processing device provided in an embodiment of this application;

[0056] Figure 9 is a schematic diagram of another sensing processing device provided in an embodiment of this application;

[0057] Figure 10 is a schematic diagram of the structure of the communication device provided in an embodiment of this application;

[0058] Figure 11 is a schematic diagram of the structure of the terminal provided in an embodiment of this application;

[0059] Figure 12 is a schematic diagram of the structure of a network-side device provided in an embodiment of this application;

[0060] Figure 13 is a schematic diagram of another network-side device provided in an embodiment of this application. Detailed Implementation

[0061] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0062] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0063] It is worth noting that the technologies described in this application are 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 this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0064] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), 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, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments in this application only use base stations in NR systems as examples for description and do not limit the specific type of base station.

[0065] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: 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 (or L-NEF), and Binding Support. The core network functions include: BSF (Block Network Function), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), and Network Data Analytics Function (NWDAF). It should be noted that this application embodiment only uses core network equipment in the NR system as an example and does not limit the specific type of core network equipment. If the name of the core network equipment mentioned in this application embodiment changes in subsequent protocol versions (e.g., 6G), it will still be within the scope of protection of this application.

[0066] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0067] For ease of understanding, the following describes some aspects of the embodiments of this application:

[0068] I. Communication and sensing integration, or simply communication and sensing integration.

[0069] Future mobile communication systems, such as B5G or 6G systems, will possess sensing capabilities in addition to communication capabilities. Sensing capabilities refer to the ability of one or more devices to sense the location, distance, and speed of target objects through the transmission and reception of wireless signals, or to detect, track, identify, and image target objects, events, or environments. With the deployment of small base stations using high-frequency, high-bandwidth technologies such as millimeter waves and terahertz waves in 6G networks, the resolution of sensing will be significantly improved compared to centimeter waves, enabling 6G networks to provide more refined sensing services.

[0070] Integrated Sensing and Communication (ISAC), or simply integrated sensing, refers to the integrated design of communication and sensing functions within the same system through spectrum and hardware sharing. While transmitting information, the system can sense location, distance, speed, and other information to detect, track, and identify target devices or events. The communication and sensing systems complement each other, improving overall performance and delivering a better service experience.

[0071] Based on the different transmitting and receiving nodes of the sensing signal, there are six basic sensing methods, as shown in Figure 2. These six basic sensing methods are as follows:

[0072] (1) Base station self-transmitting and self-receiving sensing. In this sensing method, base station A transmits sensing signals and performs sensing measurements by receiving the echo of the sensing signals.

[0073] (2) Inter-base station air interface sensing. At this time, base station B receives the sensing signal sent by base station A and performs sensing measurements.

[0074] (3) Uplink air interface sensing. At this time, base station A receives the sensing signal sent by terminal A and performs sensing measurements.

[0075] (4) Downlink air interface sensing. At this time, terminal B receives the sensing signal sent by base station B and performs sensing measurements.

[0076] (5) Terminal self-transmitting and receiving sensing. At this time, terminal A sends a sensing signal and performs sensing measurement by receiving the echo of the sensing signal.

[0077] (6) Sidelink sensing between terminals. At this time, terminal B receives the sensing signal sent by terminal A and performs sensing measurements.

[0078] It should be noted that each sensing method in Figure 2 uses one sensing signal transmitting node and one sensing signal receiving node as examples. In actual systems, one or more different sensing methods can be selected according to different sensing use cases and sensing requirements, and each sensing method can have one or more transmitting and receiving nodes. The sensing targets in Figure 2 are people and vehicles as examples, and it is assumed that neither people nor vehicles carry or install signal transceiver devices. The sensing targets in actual scenarios will be much more diverse.

[0079] II. Time-frequency resource allocation for sensing signals.

[0080] Sensing requirements include the resolution and / or maximum unambiguous measurement range requirements for target parameters. Target parameters include: time delay or distance, Doppler or velocity. Time-frequency resources mainly include: subcarriers occupied by the sensing signal (referred to as sensing subcarriers) and orthogonal frequency division multiplexing (OFDM) symbols occupied by the sensing signal (referred to as sensing OFDM symbols).

[0081] The relationship between resource allocation for sensing signals and sensing requirements.

[0082] 1. Time delay: When sensing via electromagnetic waves, the information obtained directly is the time delay. The relationship between time delay and resource allocation for sensing signals includes:

[0083] The resolution of the latency is given by the following formula: Where B represents the signal bandwidth;

[0084] The maximum unambiguous measurement range of time delay is given by the following formula: Where Δf is the frequency spacing between adjacent sensing subcarriers.

[0085] 2. Doppler / Velocity: When sensing via electromagnetic waves, Doppler information is directly obtained. The relationship between Doppler and the resource allocation of the sensing signal includes:

[0086] The resolution of Doppler is given by the following formula: Where T is the duration of a sensing frame (also known as the Coherent Processing Interval, CPI);

[0087] The maximum unambiguous measurement range of Doppler is given by the following formula: Where Δt represents the time interval between adjacent sensing OFDM symbols.

[0088] Based on the above analysis, given the time delay, Doppler resolution, and maximum unambiguous measurement range in the perception requirements, i.e., given Δτ, τ max , Δf d and f d,max The required amount of sensory resources is then:

[0089] Number of subcarriers

[0090] Number of OFDM symbols

[0091] The number of sensing subcarriers and / or sensing OFDM symbols that meet the above requirements is the minimum number of sensing subcarriers and / or sensing OFDM symbols required to perform sensing services.

[0092] It should be noted that, for the sensing function, in order to meet the requirements of time delay resolution and the maximum unambiguous measurement range of time delay, the sensing signal needs to occupy a certain bandwidth in the frequency domain and there needs to be a certain density between the sensing subcarriers. Based on the bandwidth of the sensing signal and the density of the sensing subcarriers, the number of sensing subcarriers needs to be no less than N2.

[0093] On the other hand, in order to meet the requirements of Doppler resolution and the maximum unambiguous measurement range of Doppler, the sensing signal needs to occupy a certain duration in the time domain and there needs to be a certain density between the sensing OFDM symbols. Based on the duration of the sensing signal and the density of the sensing OFDM symbols, the number of sensing OFDM symbols needs to be no less than M2.

[0094] During the propagation of the sensing signal, only a small portion is reflected by the sensing target and reaches the receiver; this portion is called the "target signal." To detect the sensing target, coherent accumulation in the frequency and time domains is required by varying the number of sensing subcarriers and sensing OFDM symbols to improve the target signal's SNR. When configuring the sensing signal with N² sensing subcarriers and M² sensing OFDM symbols, the coherent accumulation gain is 20log(N²M²) (dB).

[0095] In many cases, the target signal power is very weak, and the coherent accumulation gain of N² sensing subcarriers and M² sensing OFDM symbols is insufficient. This can occur, for example, when the signal propagation path after reflection from the sensing target is long, or when the radar cross-section (RCS) of the sensing target is very small.

[0096] In this context, increasing the number of resource elements (REs) occupied by the sensing signal by increasing the number of subcarriers and / or OFDM symbols can significantly improve the SNR of the target signal, thereby increasing the coherent accumulation gain. For example, doubling either the sensing subcarrier or the sensing OFDM symbol can increase the coherent accumulation gain by 6 dB; in many cases, this can improve the signal-to-noise ratio (SNR) of the target signal by 6 dB.

[0097] The number of sensing subcarriers can be increased by at least one of the following methods: increasing the bandwidth of the sensing signal, or increasing the density of the sensing subcarriers. The number of sensing OFDM symbols can be increased by at least one of the following methods: increasing the duration of the sensing signal, or increasing the density of the sensing OFDM symbols.

[0098] Figures 3a to 3d illustrate examples of increasing the number of REs occupied by the sensed signal by increasing the number of sensed subcarriers and / or sensed OFDM symbols. Figure 3a shows the initial configuration of sensed subcarriers and sensed OFDM symbols, Figure 3b shows the configuration of the sensed signal after increasing only the density of sensed subcarriers, Figure 3c shows the configuration of the sensed signal after increasing only the density of sensed OFDM symbols, and Figure 3d shows the configuration of the sensed signal after increasing the density of both sensed subcarriers and sensed OFDM symbols.

[0099] Increasing the number of sensing subcarriers, denoted as N1, and increasing the number of sensing OFDM symbols, denoted as M1, increases the number of sensing OFDM symbols. Increasing the number of sensing subcarriers and / or sensing OFDM symbols, thereby increasing the number of REs occupied by the sensing signal, improves the coherent accumulation gain. The coherent accumulation gain after increasing the number of REs occupied by the sensing signal is 20log(N1M1) (dB), representing an increase of 20log[(N1M1) / (N2M2)] (dB).

[0100] However, while increasing the number of sensing subcarriers and / or sensing OFDM symbols improves the coherent accumulation gain, it also leads to a simultaneous increase in the amount of data in the sensed signal. In many sensing use cases and methods, the receiver of the sensed signal needs to report the channel matrix extracted from the received sensed signal, or report the time-delay spectrum, Doppler spectrum, or time-delay-Doppler spectrum obtained by processing the channel matrix. A larger number of sensing subcarriers and / or sensing OFDM symbols corresponds to a larger amount of data in the channel matrix, time-delay spectrum, Doppler spectrum, or time-delay-Doppler spectrum, which increases the overhead of reporting sensed measurements.

[0101] Therefore, how to obtain coherent accumulation gain without increasing the overhead of reporting sensing measurements and without affecting subsequent sensing signal processing (e.g., processing such as elimination of sensing non-ideal factors) is a problem that needs to be solved. To this end, the sensing processing method of this application is proposed.

[0102] The perception processing method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0103] Referring to FIG4, an embodiment of this application provides a perception processing method, as shown in FIG4, the perception processing method includes:

[0104] Step 401: The first device acquires first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0105] Step 402: The first device performs target transformation on the sensing signal received by the first device based on the first information to obtain the target spectrum; the target transformation includes at least one of the following: performing N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain;

[0106] Step 403: The first device sends first data to the second device, the first data being determined based on the target spectrum;

[0107] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; and a time-frequency domain channel matrix of dimension N×M.

[0108] In this embodiment of the application, the first configuration information mentioned above can be understood as configuration information for redundant configuration processing, wherein the redundant configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; wherein N is less than N3, and M is less than M3.

[0109] Optionally, the above N less than N3 and M less than M3 can be understood as the first data being determined based on a subset of units in the target spectrum. The above first data can be understood as a report undergoing redundancy-reduction reporting processing, wherein the redundancy-reduction reporting processing includes at least one of the following: sending first data where the number of units N in the frequency dimension or delay dimension is less than N3, and sending first data where the number of units M in the time dimension or Doppler dimension is less than M3; wherein N is less than N3 and M is less than M3. For example, when the target spectrum is an N3×M1 time-delay spectrum, N time-delay units are truncated along the time-delay dimension to obtain an N×M1 time-delay spectrum as the first data, and this is reported; when the target spectrum is an N3×M1 time-delay spectrum, N time-delay units are truncated along the time-delay dimension, and an N-point DFT operation is performed along the time-delay dimension to obtain an N×M1 time-frequency domain channel matrix as the first data, and this is reported; when the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain an N1×M Doppler spectrum as the first data, and this is reported; when the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension... The first data is obtained by performing an M-point IDFT operation along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M, which is then reported. If the target spectrum is an N3×M3 time-delay-Doppler spectrum, N time delay units are truncated along the time delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M, which is then reported. Similarly, if the target spectrum is an N3×M3 time-delay-Doppler spectrum, N time delay units are truncated along the time delay dimension and M Doppler units are truncated along the Doppler dimension, and an N-point DFT operation is performed along the time delay dimension and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M, which is then reported.

[0110] Optionally, the first device can be understood as a sensing node (including a transmitting node and a receiving node) in a self-transmitting and self-receiving sensing scenario, or as a receiving node in a scenario where A transmits and B receives. The second device can be understood as a device that receives sensing data transmitted by the first device, and / or a device that configures sensing signals for the first device. In some embodiments, the second device can be understood as a core network device or a device in the core network. For example, it can be an Access and Mobility Management Function (AMF), a Sensing Function (SF), a communication application server in the core network, and a sensing application server in the core network.

[0111] Among them, the sensing function network element, also known as the sensing network element or sensing network function, can be located on the Radio Access Network (RAN) side or the core network side. It refers to the network node in the core network and / or RAN responsible for at least one of the following functions: sensing request processing, sensing resource scheduling, sensing information interaction, and sensing data processing. It can be an upgrade based on the Access and Mobility Management Function (AMF) or Location Management Function (LMF) in the 5G network, or it can be other network nodes or newly defined network nodes. Specifically, the functional characteristics of the sensing function network element can include at least one of the following:

[0112] (1) To interact with wireless signal transmitting equipment and / or wireless signal measuring equipment (including target terminal or the serving base station of the target terminal or the base station associated with the target area) to exchange target information, wherein the target information includes sensing processing requests, sensing capabilities, sensing auxiliary data, sensing measurement type, sensing resource configuration information, etc., in order to obtain the value of the target sensing result or sensing measurement (uplink measurement or downlink measurement) sent by the wireless signal measuring equipment; wherein, the wireless signal can also be referred to as the sensing signal.

[0113] (2) The sensing method to be used is determined based on factors such as the type of sensing service, the information of sensing service consumers, the required quality of service (QoS) requirements, the sensing capability of the wireless signal transmitting equipment, and the sensing capability of the wireless signal measuring equipment. The specific sensing methods will not be elaborated here.

[0114] (3) The sensing equipment for the sensing service is determined based on factors such as the type of sensing service, the information of the sensing service consumer, the required sensing QoS requirements, the sensing capability of the wireless signal transmitting equipment, and the sensing capability of the wireless signal measuring equipment. The sensing equipment includes wireless signal transmitting equipment and / or wireless signal measuring equipment.

[0115] (4) Manage the overall coordination and scheduling of resources required for sensing services, such as configuring the sensing resources of base stations and / or terminals accordingly.

[0116] (5) The values ​​of the sensed measurements are processed or calculated to obtain the sensed results. Furthermore, the results can also be used to verify the sensed results and estimate the sensed accuracy.

[0117] It should be understood that the above-mentioned first configuration information can configure the sensing signal to exist in the following three situations:

[0118] Case 1: N1 is greater than N2, and M1 equals M2;

[0119] Case 2: N1 equals N2, M1 is greater than M2;

[0120] Case 3: N1 is greater than N2, and M1 is greater than M2.

[0121] For scenario 1, it can be understood as improving the coherent accumulation gain by simply using more sensing subcarriers. For scenario 2, it can be understood as improving the coherent accumulation gain by simply using more sensing OFDM symbols. For scenario 3, it can be understood as improving the coherent accumulation gain by using both more sensing subcarriers and more sensing OFDM symbols.

[0122] It should be understood that the subcarrier occupied by the sensing signal can be understood or replaced with the sensing subcarrier, and the OFDM symbol occupied by the sensing signal can be understood or replaced with the sensing OFDM symbol.

[0123] Optionally, the configuration used to configure the sensing signal to occupy N2 subcarriers and M2 OFDM symbols can be understood as the second configuration information. Compared with the sensing signal using the second configuration information, (ideally) the coherent accumulation gain of the sensing signal using the first configuration information is improved by 20log[(N1M1) / (N2M2)](dB). Thus, configuring N1*M1 is greater than N2*M2, thereby achieving redundant configuration of the sensing signal and thus improving the coherent accumulation gain of the sensing signal.

[0124] Optionally, assuming that in the first configuration information, the frequency spacing between adjacent sensing subcarriers is Δf1 and the time interval between adjacent sensing OFDM symbols is Δt1; and in the second configuration information, the frequency spacing between adjacent sensing subcarriers is Δf2 and the time interval between adjacent sensing OFDM symbols is Δt2, then the first configuration information needs to satisfy the following conditions to guarantee the time delay and / or Doppler resolution performance and the maximum unambiguous measurement range:

[0125] The sensing signal bandwidth N1Δf1 in the first configuration information is not less than the sensing signal bandwidth N2Δf2 in the second configuration information, that is, N1Δf1≥N2Δf2;

[0126] The frequency interval Δf1 between adjacent sensing subcarriers in the first configuration information is not greater than the frequency interval Δf2 between adjacent sensing subcarriers in the second configuration information, that is, Δf1≤Δf2.

[0127] The coherent processing time M1Δt1 of the sensed signal in the first configuration information is not less than the coherent processing time M2Δt2 of the sensed signal in the second configuration information, that is, M1Δt1≥M2Δt2.

[0128] The time interval Δt1 between adjacent sensing OFDM symbols in the first configuration information is not greater than the time interval Δt2 between adjacent sensing OFDM symbols in the second configuration information, i.e., Δt1≤Δt2.

[0129] It should be noted that after the first device obtains the first configuration information and the first information, or after the first configuration information is activated, it will perform target transformation on the sensing signals subsequently received by the first device. The aforementioned target transformation can include three methods: transformation only in the time domain, transformation only in the frequency domain, and transformation in both the time and frequency domains simultaneously. The target spectra obtained by the three methods are different, for example:

[0130] Method 1: If only frequency domain transformation is performed, the target spectrum obtained is a time delay spectrum with dimensions N3×M1;

[0131] Method 2: If only the time domain transformation is applied, the resulting target spectrum is a Doppler spectrum with dimensions N1×M3;

[0132] Method 3: Simultaneously transforming both the time domain and frequency domain, the resulting target spectrum is a time-delay-Doppler spectrum with dimensions N3×M3.

[0133] In the case of target transformation using method 1, the first data may include a time delay spectrum of dimension N×M1, or a time-frequency domain channel matrix of dimension N×M1. In the case of target transformation using method 2, the first data may include a Doppler spectrum of dimension N1×M, or a time-frequency domain channel matrix of dimension N1×M. In the case of target transformation using method 3, the first data may include a time delay-Doppler spectrum of dimension N×M, or a time-frequency domain channel matrix of dimension N×M.

[0134] Optionally, for method 1 above, a portion of the target spectrum may include N time delay units truncated from the time delay spectrum of each sensing OFDM symbol; for method 2 above, a portion of the target spectrum may include M Doppler units truncated from the Doppler spectrum of each sensing subcarrier; for method 3 above, a portion of the target spectrum may include N time delay units truncated along the time delay dimension and M Doppler units truncated along the Doppler dimension in the time delay-Doppler spectrum. In this way, by truncating a portion of the target spectrum to determine the first data, redundant reporting can be achieved, thus reducing reporting overhead.

[0135] Optionally, for situation 1 above, the target transformation can be performed using method 1 above; for situation 2 above, the target transformation can be performed using method 2 above; and for situation 3 above, the target transformation can be performed using method 3 above.

[0136] In this embodiment, a first device acquires first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first device performs target transformation on the sensing signal received by the first device based on the first information to obtain the target spectrum. The target transform includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain; the first device sends first data to the second device, the first data being determined based on the target spectrum; wherein the first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3, and M is less than M3. Thus, by configuring N1*M1 to be greater than N2*M2 to achieve redundant configuration of the sensing signal and improve the coherent accumulation gain of the sensing signal, while simultaneously determining that N is less than N3 and M is less than M3 in the first data based on the target spectrum, redundant reporting is achieved, reducing reporting overhead. Therefore, the embodiments of this application can improve the coherent accumulation gain while avoiding increasing the reporting overhead of the sensed measurement.

[0137] Optionally, in some embodiments, the first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

[0138] Optionally, N3 is a default item in the first information. If this item is defaulted, it is equivalent to implicitly indicating that N1 indicated in the first configuration information is used as the IDFT point N3; that is, N3 = N1.

[0139] Optionally, M3 is a default item in the first information. If this item is defaulted, it is equivalent to implicitly indicating that M1 indicated in the first configuration information is used as the IDFT point M3; that is, M3 = M1.

[0140] Optionally, the first information including N can be understood as the number of delay units N extracted from the delay spectrum. N can be a default value in the first information. If this value is omitted, it implicitly indicates that the IDFT point number N3 is used as the number of delay units N in the reported delay spectrum; this further implicitly indicates that redundancy configuration processing and de-redundancy reporting processing are not performed in the frequency domain. If this value is not omitted, it implicitly indicates that redundancy configuration processing and de-redundancy reporting processing are performed in the frequency domain.

[0141] Optionally, the first information including M can be understood as the first information including the number of Doppler units M extracted from the Doppler spectrum. In the first information, M can be a default item. If this item is defaulted, it is equivalent to implicitly indicating that the DFT point number M3 is used as the number of Doppler units M in the reported Doppler spectrum. This is further equivalent to implicitly indicating that redundant configuration processing and redundancy removal reporting processing are not performed in the time domain.

[0142] Optionally, in some embodiments, the first device acquiring the first information includes at least one of the following:

[0143] The first device receives at least a portion of the first information from the second device;

[0144] The first device receives second information from the second device and determines at least a portion of the content in the first information based on the second information;

[0145] The second information includes at least one of the following:

[0146] Latency resolution;

[0147] Maximum fuzzy measurement range of time delay;

[0148] Doppler resolution;

[0149] The maximum ambiguity measurement range of Doppler.

[0150] In this embodiment, the content of the first information can be configured by the second device or determined by the terminal, or partially configured by the second device and partially determined by the terminal. When the terminal determines part of the content of the first information, it can receive the second information from the second device and determine the information based on the second information.

[0151] In one embodiment, the first device may determine at least a portion of the first information based on the second information and in conjunction with the device capability information of the first device.

[0152] Optionally, in some embodiments, the second information described above further includes at least one of the following:

[0153] The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension.

[0154] The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension.

[0155] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: when the target spectrum is a delay spectrum of N3×M1, N delay units are truncated along the delay dimension to obtain a delay spectrum of dimension N×M1 as the first data, and reported.

[0156] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0157] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0158] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0159] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0160] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0161] Optionally, the above redundancy configuration processing can be understood as including at least one of the following: a first sub-process, used to configure the number of sensing subcarriers N1 to be greater than N2; a second sub-process, used to configure the number of sensing OFDM symbols M1 to be greater than M2. The above redundancy removal reporting processing can be understood as including: a third sub-process, used to, when the target spectrum is an N3×M1 time delay spectrum, truncate N time delay units along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data and report it; or, truncate N time delay units along the time delay dimension and perform N-point DFT operation along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data and report it; a fourth sub-process, used to, when the target spectrum is an N1×M3 Doppler spectrum, truncate M Doppler units along the Doppler dimension to obtain a Doppler spectrum of dimension N1×M as the first data and report it; or, The first data is obtained by truncating M Doppler units along the Doppler dimension and performing M-point IDFT operations along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M, which is then reported. The fifth sub-process is used to truncate N time delay units along the time delay dimension and M Doppler units along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M, which is then reported. Alternatively, the first data is obtained by truncating N time delay units along the time delay dimension and M Doppler units along the Doppler dimension, performing N-point DFT operations along the time delay dimension and M-point IDFT operations along the Doppler dimension, which is then reported.

[0162] It should be noted that the second information contains different indication information, and the corresponding redundancy configuration processing and redundancy removal reporting processing are different. For example, in some embodiments, when the second information only includes the first indication information, it indicates the first sub-process and the third sub-process; when the second information only includes the second indication information, it indicates the second sub-process and the fourth sub-process; when the second information only includes the first indication information and the second indication information, it indicates the first sub-process, the second sub-process, and the fifth sub-process.

[0163] Optionally, in some embodiments, the method further includes:

[0164] The first device sends device capability information to the second device, and the device capability information is used to assist the second device in determining at least a portion of the content in the first information;

[0165] The device capability information includes at least one of the following:

[0166] A list of points supported by the IDFT operation for the first device;

[0167] A list of points for DFT operations supported by the first device.

[0168] In this embodiment of the application, when at least part of the content in the first information is determined by the second device, the first device can send the device capability information of the first device to the second device, so that the second device can better determine at least part of the content in the first information, ensure the accuracy of the determination of the first information, and avoid the first information configuration error caused by the first device not supporting it.

[0169] It should be noted that the second device needs to combine the device capability information of the first device to determine the value of the parameter in the first information, and can also combine the device capability information of the first device to determine the configuration of the sensing signal, that is, the first configuration information, so that N3 and M3 in the first information can be omitted.

[0170] Optionally, in some embodiments, the method further includes:

[0171] The first device sends second data to the second device; wherein,

[0172] When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used;

[0173] Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3;

[0174] Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are:

[0175] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following:

[0176] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported.

[0177] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0178] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0179] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0180] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0181] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0182] In the embodiments of this application, the third indication information described above can be equivalent to the first indication information described above, and the fourth indication information can be equivalent to the second indication information described above. That is, in some embodiments, the third indication information is used to indicate the first sub-process and the third sub-process; the fourth indication information is used to indicate the second sub-process and the fourth sub-process. When both the third and fourth indication information are included, they are used to indicate the first sub-process, the second sub-process, and the fifth sub-process.

[0183] Optionally, in some embodiments, the N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain includes any of the following:

[0184] When N3 equals N1, perform N3-point IDFT operation directly on the channel matrix of N1 points on each sensing OFDM symbol along the frequency dimension.

[0185] When N3 is greater than N1, zeros are padded after the channel matrix of N1 points on each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension.

[0186] When N3 is less than N1, N3 points of the channel matrix are extracted from the N1-point channel matrix of each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension.

[0187] In this embodiment, if the first device supports N1-point IDFT operation, or can support fast N1-point IDFT operation (e.g., IFFT operation), then N1-point IDFT can be performed directly, resulting in N3 = N1. When N3 is greater than N1, the number of zeros padded can be N3 - N1.

[0188] For cases where N3 is greater than N1, if the first device cannot support N1-point IDFT operations, or cannot support fast N1-point IDFT operations, then N1-point IDFT cannot be performed directly. One implementation method is to pad the channel matrix (or channel vector) of each sensing OFDM symbol with zeros at N1 points in the frequency domain to perform N3-point IDFT operations; wherein, the first device can support N3-point IDFT operations, or the first device can support fast N3-point IDFT operations; the number of zeros padded to the channel matrix (or channel vector) of each sensing OFDM symbol with N1 points in the frequency domain is N3-N1.

[0189] For cases where N3 is less than N1, if the first device cannot support N1-point IDFT operations, or cannot support fast N1-point IDFT operations, then N1-point IDFT cannot be performed directly. One implementation method is to extract the channel matrices (or channel vectors) corresponding to N3 consecutive sensing subcarriers from the N1-point channel matrix (or channel vector) of each sensing OFDM symbol in the frequency domain for N3-point IDFT operations; wherein, the first device can support N3-point IDFT operations, or the first device can support fast N3-point IDFT operations.

[0190] Optionally, in some embodiments, the N3-point channel matrix satisfies at least one of the following:

[0191] The bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments is greater than or equal to the target bandwidth.

[0192] The ratio of the bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments to the target bandwidth is greater than or equal to the first threshold.

[0193] The target bandwidth is the minimum bandwidth that meets the latency resolution requirements.

[0194] In this embodiment, the bandwidth occupied by the N3 captured sensing subcarriers should be ensured to be no less than the target bandwidth to guarantee the latency resolution performance of the sensing signal. If the bandwidth occupied by the N3 captured sensing subcarriers cannot be guaranteed to be no less than the target bandwidth due to limitations in the number of IDFT points supported by the first device or the number of points supported for fast IDFT computation, the ratio of the bandwidth occupied by the N3 sensing subcarriers corresponding to the N3-point channel moments to the target bandwidth should be greater than or equal to a first threshold. This ensures that the loss in latency resolution performance is not too significant and that the sensing service can still be performed adequately.

[0195] Optionally, the first threshold may be agreed upon by a protocol or indicated by a second device or agreed upon by a protocol. For example, in some embodiments, the first threshold may be 0.9.

[0196] Optionally, in some embodiments, the M3-point Discrete Fourier Transform (DFT) along the time domain to the Doppler domain includes any of the following:

[0197] When M3 equals M1, the M3-point DFT operation is performed directly on the channel matrix of M1 point on each sensing subcarrier along the time dimension, or the M3-point DFT operation is performed directly on the M1-point data of each delay unit in the delay spectrum along the time dimension.

[0198] When M3 is greater than M1, zeros are padded after the M1-point channel matrix on each sensing subcarrier, and M3-point DFT operation is performed along the time dimension; or zeros are padded after the M1-point data on each delay unit in the delay spectrum, and M3-point DFT operation is performed along the time dimension.

[0199] When M3 is less than M1, the M3 point channel matrix is ​​extracted from the M1 point channel matrix on each sensing subcarrier, and the M3 point DFT operation is performed along the time dimension; or, the M3 point data is extracted from the M1 point data on each delay unit in the delay spectrum, and the M3 point DFT operation is performed along the time dimension.

[0200] In this embodiment, if the first device can support M1-point DFT operation, or can support fast M1-point DFT operation (e.g., FFT operation), then M1-point DFT can be performed directly, resulting in M3 = M1. If M3 is greater than M1, the number of zeros padded can be M3 - M1.

[0201] If M3 is greater than M1, and the first device cannot support M1-point DFT operations, or cannot support fast M1-point DFT operations, then M1-point DFT cannot be performed directly. One implementation is to pad the channel matrix (or channel vector) at point M1 in the time domain of each sensing subcarrier, or the M1-point data at the rising edge of each delay unit, with zeros to perform M3-point DFT operations. The first device must support M3-point DFT operations, or be able to support fast M3-point DFT operations. The number of zeros padded after the channel matrix (or channel vector) at point M1 in the time domain of each sensing subcarrier, or after the rising edge of each delay unit, is M3 - M1.

[0202] If M3 is less than M1, and the first device cannot support M1-point DFT operation, or cannot support fast M1-point DFT operation, then M1-point DFT cannot be performed directly. Another implementation is to extract the channel matrix (or channel vector) corresponding to M3 consecutive sensing OFDM symbols from the channel matrix (or channel vector) at point M1 in the time domain of each sensing subcarrier, or to extract the data corresponding to M3 consecutive sensing OFDM symbols from the M1-point data in each delay unit, to perform M3-point DFT operation; wherein, the first device must be able to support M3-point DFT operation, or the first device must be able to support fast M3-point DFT operation.

[0203] Optionally, in some embodiments, the M3-point channel matrix or the M3-point data satisfies at least one of the following:

[0204] The duration occupied by the M3 point channel matrix or the M3 sensing OFDM symbols corresponding to the M3 point data is greater than or equal to the target duration;

[0205] The ratio of the time occupied by the M3 point channel matrix or the M3 point data corresponding to the M3 sensing OFDM symbols to the target duration is greater than or equal to the second threshold.

[0206] The target duration is the minimum duration that satisfies the Doppler resolution requirement.

[0207] In this embodiment, the duration occupied by the captured M3 sensing OFDM symbols should be as long as possible not less than the target duration to ensure the Doppler resolution performance of the sensing signal. If, due to limitations in the number of DFT points supported by the first device or the number of points supported for fast DFT computation, it cannot be guaranteed that the duration occupied by the captured M3 sensing OFDM symbols is not less than the target duration, the ratio of the time occupied by the M3-point channel matrix or the M3-point data corresponding to the M3 sensing OFDM symbols to the target duration should be greater than or equal to a second threshold. This ensures that the loss of Doppler resolution performance is not too significant and that the sensing service can still be performed adequately.

[0208] Optionally, the second threshold may be agreed upon by a protocol or indicated by a second device or protocol. For example, in some embodiments, the first threshold may be 0.9.

[0209] It should be noted that the above-mentioned target transformation and transmission of the first data behavior include the following three cases:

[0210] Case a: Perform IDFT operation only along the frequency dimension to transform the sensed signal to the time delay domain to obtain the time delay spectrum. The dimension of the time delay spectrum is N3×M1, that is, the time delay spectrum of each of the M1 sensed OFDM symbols includes N3 time delay units (bins). Then, N time delay units are extracted from the time delay spectrum of each sensed OFDM symbol for reporting or further processing before reporting.

[0211] Case b: Perform DFT operations only along the time dimension to transform the sensed signal to the Doppler domain and obtain the Doppler spectrum. The dimension of the Doppler spectrum is N1×M3, that is, the Doppler spectrum on each of the N1 sensed subcarriers includes M3 Doppler units. Then, M Doppler units are extracted from the Doppler spectrum on each sensed subcarrier for reporting or further processing before reporting.

[0212] Case c: Perform IDFT operations along the frequency dimension and DFT operations along the time dimension to transform the sensed signal into the time-delay-Doppler domain to obtain the time-delay-Doppler spectrum. The dimension of the time-delay-Doppler spectrum is N3×M3, that is, the time-delay-Doppler spectrum includes N3 time-delay units in the time-delay dimension and M3 Doppler units in the Doppler dimension. Then, N time-delay units are truncated in the time-delay dimension and M Doppler units are truncated in the Doppler dimension.

[0213] Optionally, in some embodiments, N3 is an integer multiple of N;

[0214] And / or, M3 is an integer multiple of M.

[0215] In this embodiment, it is assumed that for the sensing signal of the first configuration information, its time delay resolution is 1 / (N1Δf1) and the maximum unambiguous measurement range of the time delay is 1 / Δf1. It is also assumed that for the sensing signal of the second configuration information, its time delay resolution is 1 / (N2Δf2) and the maximum unambiguous measurement range of the time delay is 1 / Δf2; obviously, here 1 / Δf1 ≥ 1 / Δf2.

[0216] Optionally, after the transformation of the sensing signal of the first configuration information from the frequency domain to the time delay domain is performed using N3-point IDFT, its time delay resolution becomes 1 / (N3Δf1), and the maximum unambiguous measurement range of the time delay remains 1 / Δf1.

[0217] For the time delay spectrum at point N3, after truncating N points, its time delay range is N / (N3Δf1).

[0218] To ensure that the measurement range of the reported N-point time delay spectrum is not lost, N / (N3Δf1) ≥ 1 / Δf2 should be guaranteed, then:

[0219] Alternatively, at least the loss in the measurement range of the time delay spectrum should be controlled within a certain range, i.e., the ratio of N / (N3Δf1) to 1 / Δf2 should not be less than the third threshold δ3, then:

[0220] An alternative approach is that N satisfies the above conditions, and also satisfies the following condition: N3 is an integer multiple of N.

[0221] Let N³ / N = α, where α is a positive integer. Under this condition, the channel matrix of N subcarriers out of N³ subcarriers can be completely recovered from the time delay spectrum at N points. The indices of these N subcarriers within the N³ subcarriers are: [Δα, Δα+α, Δα+2α, ..., N³-1], where Δα = 0, 1, 2, ..., α-1 depends on the position of the N subcarriers within the N³ subcarriers.

[0222] After recovering the channel matrix of N subcarriers, the same processing method as the sensing signal in the second configuration information can be used to obtain all available sensing results. See related technologies for details, which will not be elaborated upon here.

[0223] If N3 is not an integer multiple of N, some post-processing can be performed based on the reported time-delay spectrum of N points. For example, a time-dimensional DFT can be performed to obtain the time-delay-Doppler spectrum, followed by target detection and parameter estimation. However, since the channel matrix of N subcarriers cannot be recovered, some sensing signal processing methods cannot be used, such as some methods for eliminating non-ideal factors in sensing.

[0224] Optionally, in some embodiments, the N time delay units truncated along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay;

[0225] And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

[0226] In this embodiment of the application, N delay units can be understood as: taking the N points with the smallest delay from the N3-point delay spectrum: let each delay unit in the delay spectrum obtained after the N3-point IDFT be sorted in ascending order of its corresponding delay value, and its index value be 0, 1, 2, ..., N3-1; then take the delay spectrum of the N delay units with index values ​​of 0, 1, 2, ..., N-1, as shown in Figure 5.

[0227] Optionally, in some embodiments, M is an even number, and the index value is... The corresponding Doppler unit has a negative Doppler value and an index value of [missing information]. The corresponding Doppler unit has a Doppler value of zero and an index value of zero. The corresponding Doppler unit has a positive Doppler value.

[0228] In this embodiment, M Doppler units can be understood as: taking the middle M points from the M3-point Doppler spectrum: Let each Doppler unit in the Doppler spectrum obtained after the M3-point DFT be sorted according to its corresponding Doppler value in ascending order (including from negative to positive), with index values ​​of 0, 1, 2, ..., M3-1. Since Doppler values ​​can be positive or negative, the number of units M3 in the Doppler spectrum is usually even. When M3 is even, the Doppler values ​​of the units corresponding to index values ​​0, 1, 2, ..., (M3 / 2)-1 are negative, the Doppler values ​​of the units corresponding to index values ​​(M3 / 2)+1, (M3 / 2)+2, ..., M3-1 are positive, and the Doppler value of the unit corresponding to index value M3 / 2 is zero.

[0229] To maintain the aforementioned properties of the Doppler spectrum, it is necessary to ensure that the number of points M in the truncated Doppler spectrum is even, and that the truncated Doppler spectrum satisfies the following: the Doppler values ​​of the elements corresponding to index values ​​0, 1, 2, ..., (M / 2)-1 are negative; the Doppler values ​​of the elements corresponding to index values ​​(M / 2)+1, (M / 2)+2, ..., M-1 are positive; and the Doppler value of the element corresponding to index value M / 2 is zero. This means that an M-point Doppler spectrum needs to be truncated from the middle portion of the M3-point Doppler spectrum, as shown in Figure 6.

[0230] To better understand this application, some examples are provided below.

[0231] In some embodiments, redundant configuration processing and redundancy removal reporting processing can be applied in the frequency domain / delay domain.

[0232] In the second configuration information that satisfies the resolution performance of time delay and Doppler measurement, and the maximum unambiguous measurement range performance, the number of sensing subcarriers and the number of sensing OFDM symbols are N2 and M2, respectively. Redundancy configuration processing and redundancy removal reporting processing are only applied in the frequency domain and its corresponding time delay domain, and the number of sensing subcarriers and the number of sensing OFDM symbols configured for the sensing signal are N1 and M1, respectively; where N1 > N2 and M1 = M2.

[0233] The receiving end (first device) of the sensing signal receives the sensing signal and performs channel estimation. The resulting channel matrix has a dimension of N1×M2. Therefore, under ideal conditions, the maximum improvement in the coherent accumulation gain of the sensing signal can reach 20log(N1 / N2)(dB).

[0234] After obtaining the N1×M2 channel matrix, the first device needs to perform an IDFT operation along the frequency dimension to transform it to the time delay domain, and a DFT operation along the time dimension to transform it to the Doppler domain. This involves two cases:

[0235] The first scenario is: the first device can support N1-point IDFT, or can support fast N1-point IDFT computation. In this case, the number of points in the IDFT computation, N3 = N1.

[0236] The second scenario is: the first device cannot support N1-point IDFT, or cannot support fast N1-point IDFT computation. In this case, it is necessary to pad the N1-point frequency domain channel vector on each OFDM symbol with zeros (N3 > N1) or truncate it to N3 (N3 < N1), and then perform N3-point IDFT computation.

[0237] The time delay spectrum is obtained by performing an N3-point IDFT operation, or by performing an M2-point DFT operation along the time dimension after obtaining the time delay spectrum from the N3-point IDFT operation to obtain the time delay-Doppler spectrum. Whether reporting the time delay spectrum or the time delay-Doppler spectrum, in order to reduce the amount of data reported while ensuring sensing performance, N time delay units are truncated from the N3 time delay units in the time delay dimension.

[0238] In this embodiment, to facilitate subsequent processing, it is necessary to satisfy the following condition: N3 is an integer multiple of N; that is, N3 = αN, where α is a positive integer. In this case, after the first device reports the truncated time delay spectrum or time delay-Doppler spectrum to the second device, the second device can completely recover the time-frequency domain channel matrix with dimension N×M2, denoted as: the second channel matrix.

[0239] It should be noted that if we denote the N2×M2 time-frequency domain channel matrix corresponding to the sensing signal using the second configuration information as the first channel matrix, then the sensing information contained in the second channel matrix is ​​the same as or very similar to the sensing information contained in the first channel matrix. Furthermore, the sensing signal power of the second channel matrix can have a maximum gain of 20log(N1 / N2) (dB), enabling the sensing of targets at greater distances or smaller targets. Theoretically, a gain of 20log(N1 / N2) (dB) can be obtained when N3≥N1; the gain obtained when N3<N1 is slightly smaller than 20log(N1 / N2) (dB).

[0240] In some embodiments, redundant configuration processing and redundancy removal reporting processing can be applied in the frequency domain / delay domain.

[0241] In an NR system, a maximum signal bandwidth of 273 RBs can be configured. In one application scenario, setting the frequency spacing between adjacent sensing subcarriers to 2 RBs within this 273 RBs bandwidth can meet the requirements of delay resolution and the maximum unambiguous delay measurement range for that application scenario. Therefore, the sensing signal will occupy N² = 137 subcarriers at intervals.

[0242] However, the coherent accumulation gain of N2 = 137 subcarriers is insufficient for detecting targets with small radar cross sections (RCS). Using the sensing processing method of this application, the number of subcarriers occupied by the sensing signal is increased in the frequency domain: the frequency spacing between adjacent sensing subcarriers is made to be 2 subcarriers; thus, the sensing signal will occupy N1 = 1638 subcarriers in a 273 RBs bandwidth. In this case, the maximum increase in coherent accumulation gain is 20log(N1 / N2) = 21.55 (dB).

[0243] However, the Xilinx Field Programmable Gate Array (FPGA) chip used in the device hardware cannot support 1638-point IDFT operations. Zero-padding or truncating the frequency domain channel vectors of N1 = 1638 subcarriers is required before IDFT operations can be performed. According to the product manual, this FPGA model supports IDFT / DFT operations at 1620 and 1728 points, respectively, in the vicinity of 1638 points. Considering that 1620 points and 1638 points are quite close, the frequency domain channel vectors of N1 = 1638 subcarriers are truncated before performing the N3 = 1620-point IDFT operation.

[0244] However, reporting the entire time delay spectrum or time delay-Doppler spectrum would increase the amount of reported data by nearly 12 times. Furthermore, since the sensing signal configuration of N2 = 137 subcarriers is sufficient to meet the requirements for time delay resolution and the maximum unambiguous measurement range of time delay, the time delay spectrum or time delay-Doppler spectrum corresponding to N3 = 1620 subcarriers has significant redundancy in the time delay dimension.

[0245] Therefore, the perceptual processing method of this application is used to truncate the time delay dimension before reporting. The number of units in the truncated time delay dimension is N = 180. The first reason for choosing N = 180 is that N³ = 1620 is divisible by N = 180: 1620 / 180 = 9; the second reason for choosing N = 180 is that this type of FPGA can support 180-point IDFT / DFT operations.

[0246] Thus, after extracting the time delay spectrum at N=180 points, the first device can perform one of the following actions:

[0247] The first device performs a DFT operation on the time delay spectrum of N=180 points on each OFDM symbol, transforms it back to the frequency domain, and obtains a frequency domain channel vector of N=180 points; then it reports this frequency domain channel vector or

[0248] The first device directly reports the time delay spectrum of N=180 points on each OFDM symbol.

[0249] In this case, after receiving the time delay spectrum, the second device can transform the time delay spectrum back into the frequency domain to obtain a frequency domain channel vector of N=180 points.

[0250] The effect of the N=180 point frequency domain channel vector is equivalent to: decimating the truncated N3=1620 subcarriers by a factor of 9. The final effect is equivalent to: the frequency domain configuration of the sensing signal is: within a bandwidth of 273 RBs, one subcarrier out of every 18 subcarriers is a sensing subcarrier, for a total of 180 sensing subcarriers. Comparing this equivalent sensing signal configuration (i.e., the first configuration information) with the second configuration information:

[0251] The second configuration information contains 137 sensing subcarriers, with a spacing of 2 RBs (i.e., 24 subcarriers) between adjacent sensing subcarriers; therefore, its effective bandwidth is 137 * 24 = 3288 subcarriers.

[0252] The equivalent sensing signal configuration described above consists of 180 sensing subcarriers with an interval of 18 subcarriers between adjacent sensing subcarriers; therefore, its effective bandwidth is 3240 subcarriers.

[0253] Therefore, we can draw the following conclusions:

[0254] Regarding latency resolution: the effective bandwidth of 3240 subcarriers is only reduced by 1.46% compared to the effective bandwidth of 3288 subcarriers, so the loss in latency resolution is negligible.

[0255] Regarding the maximum unambiguous measurement of delay: a sensing subcarrier spacing of 18 subcarriers, compared to a sensing subcarrier spacing of 24 subcarriers, improves the maximum unambiguous measurement range of delay by 33%. This is the third reason for choosing N=180.

[0256] Finally, from the perspective of coherent accumulation gain, the 1620 subcarriers participating in IDFT, compared with the 137 subcarriers in the second configuration information, can achieve a coherent accumulation gain improvement of 20log(N3 / N2) = 21.46 (dB), which is beneficial for detecting sensing targets with smaller RCS or more distant sensing targets.

[0257] In some embodiments, redundant configuration processing and redundancy removal reporting processing can be applied in the time domain / Doppler domain.

[0258] In the first configuration, which satisfies the resolution performance of time delay and Doppler measurement, and the maximum unambiguous measurement range performance, the number of sensing subcarriers and the number of sensing OFDM symbols are N2 and M2, respectively. When the method of this application is used only in the time domain and its corresponding Doppler domain, the number of sensing subcarriers and the number of sensing OFDM symbols configured for the sensing signal are N1 and M1, respectively; where N1 = N2 and M1 > M2.

[0259] The receiving end (first device) of the sensing signal receives the sensing signal and performs channel estimation. The resulting channel matrix has a dimension of N2×M1. Therefore, under ideal conditions, the maximum improvement in the coherent accumulation gain of the sensing signal can reach 20log(M1 / M2)(dB).

[0260] After obtaining the N2×M1 channel matrix, the first device needs to perform an IDFT operation along the frequency dimension to transform it to the time delay domain, and a DFT operation along the time dimension to transform it to the Doppler domain. This involves two cases:

[0261] The first scenario is: the first device can support M1-point DFT, or can support fast computation of M1-point DFT. In this case, the number of points in the DFT computation is M3 = M1.

[0262] The second scenario is: the first device cannot support M1-point DFT, or cannot support fast M1-point DFT computation. In this case, it is necessary to zero-padded (M3 > M1) or truncated (M3 < M1) the M1-point frequency domain channel vector on each OFDM symbol in the channel matrix, or the M1-point time delay spectrum data on each time delay unit in the time delay spectrum, and then perform M3-point DFT computation.

[0263] The Doppler spectrum is obtained by performing an M3-point DFT operation, or the time-delay spectrum is obtained by performing an M3-point DFT operation along the time dimension after performing an N2-point IDFT operation. Whether reporting the Doppler spectrum or the time-delay-Doppler spectrum, in order to reduce the amount of data reported while ensuring sensing performance, M Doppler units are truncated from the M3 Doppler units in the Doppler dimension.

[0264] In this embodiment, to facilitate subsequent processing, it is necessary to satisfy the following condition: M3 is an integer multiple of M; that is, M3 = βM, where β is a positive integer. In this case, after the first device reports the truncated Doppler spectrum or the time-delay-Doppler spectrum to the second device, the second device can completely recover the channel matrix in the time-frequency domain with dimension N2×M, denoted as: the third channel matrix.

[0265] It should be noted that if we denote the N2×M2 time-frequency domain channel matrix corresponding to the sensing signal using the second configuration information as the first channel matrix, then the sensing information contained in the third channel matrix is ​​the same as or very similar to the sensing information contained in the first channel matrix. Furthermore, the sensing signal power of the third channel matrix can have a maximum gain of 20log(M1 / M2) (dB), enabling the sensing of targets at greater distances or smaller targets. Theoretically, a gain of 20log(M1 / M2) (dB) can be obtained when M3≥M1; the gain obtained when M3<M1 is slightly smaller than 20log(M1 / M2) (dB).

[0266] In some embodiments, redundant configuration processing and redundancy removal reporting processing can be applied in the time domain / frequency domain.

[0267] In one application scenario, to meet the requirements of Doppler resolution and maximum unambiguous measurement range, one OFDM symbol is extracted every two subframes within 20 consecutive NR frames as the sensing OFDM symbol. That is, there are a total of M² = 100 sensing OFDM symbols, with a time interval of 2ms between adjacent sensing OFDM symbols. Therefore, its Doppler resolution is 5Hz, and the maximum unambiguous measurement range is 500Hz.

[0268] However, the coherent accumulation gain of M2 = 100 sensing OFDM symbols is insufficient for detecting targets with small RCS. Using the sensing processing method of this application, the number of OFDMs occupied by the sensing signal is increased in the time domain: the time interval between adjacent sensing OFDMs is 0.5 subframes, and the coherent processing time of the sensing signal is slightly extended, resulting in the sensing signal occupying M1 = 432 OFDMs, thus increasing the coherent processing time to 21.6 NR frames. In this case, the maximum increase in coherent accumulation gain is 20log(M1 / M2) = 12.7 (dB).

[0269] The device hardware uses a Xilinx FPGA chip that can support 432-point DFT operations, i.e., M3 = M1 = 432.

[0270] However, reporting the entire Doppler spectrum or time-delay-Doppler spectrum would increase the reported data volume by 4.32 times. Furthermore, since a sensing signal configuration of M2 = 100 OFDM symbols is sufficient to meet the requirements of Doppler resolution and the maximum unambiguous measurement range, the Doppler spectrum or time-delay-Doppler spectrum corresponding to M3 = 432 OFDM symbols has significant redundancy in the Doppler dimension.

[0271] Therefore, the Doppler values ​​are truncated using the method described in this application before being reported. The number of truncated Doppler values ​​is M = 108. The first reason for choosing M = 108 is that M³ = 432 is divisible by M = 108: 432 / 108 = 4; the second reason for choosing M = 108 is that this type of FPGA can support 108-point IDFT / DFT operations.

[0272] Thus, after truncating M = 108 points in the Doppler dimension, one of the following results is obtained:

[0273] The Doppler spectrum with dimensions N2×M consists of N2 subcarriers, each subcarrier containing M Doppler units.

[0274] The time-delay Doppler spectrum with dimension N2×M consists of N2 time-delay units, each of which is a Doppler spectrum with M Doppler units.

[0275] Then, the first device can perform one of the following actions:

[0276] The first device performs an M=108-point IDFT operation on the N2×M Doppler spectrum along the Doppler dimension, thereby transforming the Doppler spectrum back to a time-frequency domain channel matrix of dimension N2×M; then it reports this channel matrix or

[0277] The first device performs an M=108-point IDFT operation along the Doppler dimension on the N2×M time-delay-Doppler spectrum, thereby transforming the time-delay-Doppler spectrum back to a time-delay spectrum of dimension N2×M; it can further perform an N2-point DFT operation along the time-delay dimension, transforming it back to a time-frequency domain channel matrix of dimension N2×M. The first device reports this time-delay spectrum or the time-frequency domain channel matrix; or

[0278] The first device directly reports the Doppler spectrum or time-delay-Doppler spectrum with dimensions N2×M.

[0279] In this case, after receiving the Doppler spectrum or time-delay-Doppler spectrum, the second device can perform further signal processing on the Doppler spectrum or time-delay-Doppler spectrum; or it can transform the Doppler spectrum or time-delay-Doppler spectrum back into a time-frequency domain channel matrix or time-delay spectrum using the same methods described in the previous two points.

[0280] The above processing is equivalent to decimating M3 = 432 OFDM symbols by a factor of 4. The final effect is equivalent to configuring the sensing signal in the time domain as follows: within a time span of 21.6 NR frames, one OFDM symbol in every two subframes is a sensing OFDM symbol, for a total of 108 sensing OFDM symbols. Comparing this equivalent sensing signal configuration (i.e., the first configuration information) with the second configuration information:

[0281] Regarding Doppler resolution: the coherent processing time for the sensing signal in the second configuration information is 20 NR radio frames, and the equivalent coherent processing time for the sensing signal configuration here is 21.6 NR radio frames; this is to ensure Doppler resolution while taking into account the number of IDFT / DFT points supported by the device, and the coherent processing time is slightly increased.

[0282] Regarding the maximum unambiguous measurement of Doppler: In the second configuration information, in the equivalent sensing signal configuration, the time interval between adjacent sensing OFDM symbols is 2 subframes, so the maximum unambiguous measurement range of Doppler is the same.

[0283] Finally, from the perspective of coherent accumulation gain, the 432 OFDM symbols participating in the DFT, compared with the 100 OFDM symbols in the first configuration, can achieve a coherent accumulation gain improvement of 20log(M3 / M2) = 12.7 (dB), which is beneficial for detecting sensing targets with smaller RCS or more distant sensing targets.

[0284] In some embodiments, redundancy configuration processing and redundancy removal reporting processing can be applied in the frequency domain / delay domain and the time domain / Doppler domain. In this application embodiment, the implementation methods and effects of applying redundancy configuration processing and redundancy removal reporting processing to the frequency domain / delay domain can be referred to the description of the embodiments related to the frequency domain / delay domain above, and the implementation methods and effects of applying redundancy configuration processing and redundancy removal reporting processing to the time domain / Doppler domain can be referred to the description of the embodiments related to the time domain / Doppler domain above.

[0285] Optionally, in some embodiments, the second device can configure the relevant parameters of the first information in the above embodiments. The interaction process between the first device and the second device includes the following steps:

[0286] 11. The first device receives first configuration information, including at least one of the following:

[0287] The starting position of the sensing signal in the time domain;

[0288] The duration occupied by the sensing signal in the time domain refers to the time length between the sensing OFDM symbol with the smallest index in the resource set and the sensing OFDM symbol with the largest index.

[0289] Sensing the spacing between OFDM symbols;

[0290] The number of OFDM symbols sensed;

[0291] Perceive the density of OFDM symbols;

[0292] The repetition period in the time domain of the time slot where the OFDM symbol is located;

[0293] Sensing the location of OFDM symbols within their respective time slots;

[0294] Perceive the temporal distribution of OFDM symbols;

[0295] The starting position of the sensing signal in the frequency domain;

[0296] The bandwidth occupied by the sensing signal in the frequency domain refers to the bandwidth between the sensing subcarrier with the smallest index and the sensing subcarrier with the largest index within the resource set.

[0297] Sensing subcarrier density;

[0298] The repetition period of the RB containing the subcarrier in the frequency domain;

[0299] Sensing the position of the subcarrier within its RB;

[0300] The location of the RB containing the sense subcarrier in the frequency domain; for example, represented by a bitmap;

[0301] Sensing the positional distribution of subcarriers in the frequency domain.

[0302] The N1 and / or M1 mentioned above are explicitly or implicitly indicated in the first configuration information.

[0303] 12. The first device receives first information, including at least one of the following:

[0304] The number of points for IDFT operation along the frequency dimension, i.e., N3 mentioned above; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that N1 indicated in the first configuration information is used as the number of IDFT points N3; that is, N3 = N1.

[0305] The number of points for DFT operation along the time dimension, i.e., M3 mentioned above; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that M1 indicated in the first configuration information is used as the number of DFT points M3; that is, M3 = M1.

[0306] The number of delay units extracted from the delay spectrum, i.e., N mentioned above; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that the IDFT point number N3 is used as the number of delay units N in the reported delay spectrum; this is further equivalent to implicitly indicating that redundancy configuration processing and redundancy removal reporting processing are not performed in the frequency domain. If this item is not omitted, it is equivalent to implicitly indicating that redundancy configuration processing and redundancy removal reporting processing are performed in the frequency domain.

[0307] The number of Doppler elements extracted from the Doppler spectrum, i.e., M mentioned above; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that the DFT point number M3 is used as the number of Doppler elements M in the reported Doppler spectrum; this is further equivalent to implicitly indicating that redundancy configuration processing and de-redundancy reporting processing are not performed in the time domain. If this item is not omitted, it is equivalent to implicitly indicating that redundancy configuration processing and de-redundancy reporting processing are performed in the time domain.

[0308] The execution order of 11 and 12 mentioned above is not further specified here.

[0309] 13. Before step 12, the first device reports its device capability information.

[0310] 14. The first device sends the first data.

[0311] In some embodiments, the relevant parameters of the first information in the above embodiments can be determined by the first device. The interaction process between the first device and the second device includes the following process:

[0312] 21. The first device receives the first configuration information.

[0313] 22. The first device receives the second information. The second information includes at least one of the following:

[0314] Latency resolution;

[0315] The maximum unambiguous measurement range of time delay;

[0316] Doppler resolution;

[0317] The maximum unambiguous measurement range of Doppler.

[0318] In addition, the second instruction information may include (or may not include) at least one of the following:

[0319] Instructions for redundancy configuration and redundancy reporting in the frequency domain (i.e., the first instruction information);

[0320] Instructions for redundancy configuration processing and redundancy removal reporting in the time domain (i.e., the second instruction information);

[0321] 23. The first device combines the second indication information and its own device capability information (the number of supported IDFT and / or DFT points) to determine the value of the parameter (the parameter in the first information). Then, it executes the perception processing method of this application.

[0322] 24. The first device sends the first data and the second data.

[0323] Optionally, if the first data includes a time delay spectrum or a time-frequency domain channel matrix of dimension N×M1, the second data includes at least one of the following:

[0324] Instructions for redundancy configuration and redundancy reporting in the frequency domain (i.e., third instruction information);

[0325] The number of time delay units extracted from the time delay spectrum, i.e., N;

[0326] The number of points for IDFT operation along the frequency dimension, i.e., N3; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that N1 indicated in the first configuration information is used as the number of IDFT points N3; that is, N3 = N1.

[0327] Optionally, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix of dimension N1×M, the second data includes at least one of the following:

[0328] Instructions for redundancy configuration processing and redundancy removal reporting in the time domain (i.e., the fourth instruction information);

[0329] The number of Doppler units extracted from the Doppler spectrum, i.e., M;

[0330] The number of points for DFT operation along the time dimension, i.e., M3; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that M1 indicated in the sensing signal configuration is used as the number of DFT points M3; that is, M3 = M1.

[0331] Optionally, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following:

[0332] Instructions for redundancy configuration and de-redundancy reporting in the frequency domain (i.e., the third instruction information) and instructions for redundancy configuration and de-redundancy reporting in the time domain (i.e., the fourth instruction information);

[0333] The number of time delay units extracted from the time delay spectrum, i.e., N;

[0334] The number of Doppler units extracted from the Doppler spectrum, i.e., M;

[0335] The number of points for IDFT operation along the frequency dimension, i.e., N3; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that N1 indicated in the first configuration information is used as the number of IDFT points N3; that is, N3 = N1;

[0336] The number of points for DFT operation along the time dimension, i.e., M3; this item can be omitted. If this item is omitted, it is equivalent to implicitly indicating that M1 indicated in the sensing signal configuration is used as the number of DFT points M3; that is, M3 = M1.

[0337] Referring to FIG7, this application embodiment also provides a sensing processing method, as shown in FIG7, the sensing processing method includes:

[0338] Step 701: The second device sends first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain.

[0339] Step 702, the second device receives first data from the first device, the first data being determined based on the target spectrum obtained by the target transformation;

[0340] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0341] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0342] Optionally, the first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

[0343] Optionally, the second information includes at least one of the following: latency resolution;

[0344] Maximum fuzzy measurement range of time delay;

[0345] Doppler resolution;

[0346] The maximum ambiguity measurement range of Doppler.

[0347] Optionally, the second information further includes at least one of the following:

[0348] The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension.

[0349] The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension.

[0350] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: when the target spectrum is a delay spectrum of N3×M1, N delay units are truncated along the delay dimension to obtain a delay spectrum of dimension N×M1 as the first data, and reported.

[0351] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0352] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0353] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0354] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0355] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0356] Optionally, the method further includes:

[0357] The second device receives device capability information from the first device;

[0358] The second device determines at least a portion of the first information based on the device capability information;

[0359] The device capability information includes at least one of the following:

[0360] A list of points supported by the IDFT operation for the first device;

[0361] A list of points for DFT operations supported by the first device.

[0362] Optionally, the method further includes:

[0363] The second device receives second data from the first device; wherein,

[0364] When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used;

[0365] Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3;

[0366] Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are:

[0367] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following:

[0368] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported.

[0369] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0370] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0371] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0372] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0373] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0374] Optionally, N3 is an integer multiple of N;

[0375] And / or, M3 is an integer multiple of M.

[0376] Optionally, the N time delay units truncated along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay;

[0377] And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

[0378] The sensing processing method provided in this application can be executed by a sensing processing device. This application uses the example of a sensing processing device executing the sensing processing method to illustrate the sensing processing device provided in this application.

[0379] This application provides a sensing processing device. As an example, the sensing processing device may be a communication device or a component within a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0380] The sensing processing device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0381] Specifically, referring to Figure 8, the sensing processing device 800 includes:

[0382] The first receiving module 801 is used to acquire first configuration information and first information, wherein the first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols;

[0383] The first processing module 802 is used to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0384] The first transmitting module 803 is used to transmit first data to the second device, wherein the first data is determined based on the target spectrum;

[0385] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0386] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0387] Optionally, the first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

[0388] Optionally, the first receiving module 801 is specifically configured to perform at least one of the following:

[0389] Receive at least a portion of the first information from the second device;

[0390] Receive second information from the second device, and determine at least a portion of the content in the first information based on the second information;

[0391] The second information includes at least one of the following:

[0392] Latency resolution;

[0393] Maximum fuzzy measurement range of time delay;

[0394] Doppler resolution;

[0395] The maximum ambiguity measurement range of Doppler.

[0396] Optionally, the second information further includes at least one of the following:

[0397] The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension.

[0398] The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension.

[0399] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: when the target spectrum is a delay spectrum of N3×M1, N delay units are truncated along the delay dimension to obtain a delay spectrum of dimension N×M1 as the first data, and reported.

[0400] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0401] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0402] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0403] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0404] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0405] Optionally, the first sending module 803 is further configured to send device capability information to the second device, the device capability information being used to assist the second device in determining at least a portion of the content in the first information;

[0406] The device capability information includes at least one of the following:

[0407] A list of points supported by the IDFT operation for the first device;

[0408] A list of points for DFT operations supported by the first device.

[0409] Optionally, the first sending module 803 is further configured to send second data to the second device; wherein,

[0410] When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used;

[0411] Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3;

[0412] Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are:

[0413] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following:

[0414] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported.

[0415] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0416] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0417] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0418] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0419] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0420] Optionally, the N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain includes any of the following:

[0421] When N3 equals N1, perform N3-point IDFT operation directly on the channel matrix of N1 points on each sensing OFDM symbol along the frequency dimension.

[0422] When N3 is greater than N1, zeros are padded after the channel matrix of N1 points on each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension.

[0423] When N3 is less than N1, N3 points of the channel matrix are extracted from the N1-point channel matrix of each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension.

[0424] Optionally, the N3-point channel matrix satisfies at least one of the following:

[0425] The bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments is greater than or equal to the target bandwidth.

[0426] The ratio of the bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments to the target bandwidth is greater than or equal to the first threshold.

[0427] The target bandwidth is the minimum bandwidth that meets the latency resolution requirements.

[0428] Optionally, the M3-point Discrete Fourier Transform (DFT) along the time domain to the Doppler domain includes any of the following:

[0429] When M3 equals M1, the M3-point DFT operation is performed directly on the channel matrix of M1 point on each sensing subcarrier along the time dimension, or the M3-point DFT operation is performed directly on the M1-point data of each delay unit in the delay spectrum along the time dimension.

[0430] When M3 is greater than M1, zeros are padded after the M1-point channel matrix on each sensing subcarrier, and M3-point DFT operation is performed along the time dimension; or zeros are padded after the M1-point data on each delay unit in the delay spectrum, and M3-point DFT operation is performed along the time dimension.

[0431] When M3 is less than M1, the M3 point channel matrix is ​​extracted from the M1 point channel matrix on each sensing subcarrier, and the M3 point DFT operation is performed along the time dimension; or, the M3 point data is extracted from the M1 point data on each delay unit in the delay spectrum, and the M3 point DFT operation is performed along the time dimension.

[0432] Optionally, the M3-point channel matrix or the M3-point data satisfies at least one of the following:

[0433] The duration occupied by the M3 point channel matrix or the M3 sensing OFDM symbols corresponding to the M3 point data is greater than or equal to the target duration;

[0434] The ratio of the time occupied by the M3 point channel matrix or the M3 point data corresponding to the M3 sensing OFDM symbols to the target duration is greater than or equal to the second threshold.

[0435] The target duration is the minimum duration that satisfies the Doppler resolution requirement.

[0436] Optionally, N3 is an integer multiple of N;

[0437] And / or, M3 is an integer multiple of M.

[0438] Optionally, the N time delay units truncated along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay;

[0439] And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

[0440] Referring to Figure 9, the sensing processing device 900 includes:

[0441] The second transmitting module 901 is used to transmit first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain.

[0442] The second receiving module 902 is used to receive first data from the first device, wherein the first data is determined based on the target spectrum obtained by the target transformation;

[0443] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0444] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0445] Optionally, the first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

[0446] Optionally, the second information includes at least one of the following: latency resolution;

[0447] Maximum fuzzy measurement range of time delay;

[0448] Doppler resolution;

[0449] The maximum ambiguity measurement range of Doppler.

[0450] Optionally, the second information further includes at least one of the following:

[0451] The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension.

[0452] The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension.

[0453] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: when the target spectrum is a delay spectrum of N3×M1, N delay units are truncated along the delay dimension to obtain a delay spectrum of dimension N×M1 as the first data, and reported.

[0454] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0455] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0456] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0457] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0458] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0459] Optionally, the sensing processing device 900 further includes a second processing module, wherein,

[0460] The second receiving module 902 is further configured to receive device capability information from the first device;

[0461] The second processing module is used to determine at least a portion of the first information based on the device capability information;

[0462] The device capability information includes at least one of the following:

[0463] A list of points supported by the IDFT operation for the first device;

[0464] A list of points for DFT operations supported by the first device.

[0465] Optionally, the second receiving module 902 is further configured to receive second data from the first device; wherein,

[0466] When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used;

[0467] Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3;

[0468] Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are:

[0469] The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following:

[0470] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported.

[0471] When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported.

[0472] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported.

[0473] When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported.

[0474] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported.

[0475] When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

[0476] Optionally, N3 is an integer multiple of N;

[0477] And / or, M3 is an integer multiple of M.

[0478] Optionally, the N time delay units truncated along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay;

[0479] And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

[0480] The sensing processing device provided in this application embodiment can implement the various processes implemented in the method embodiments of Figures 4 to 7 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0481] As shown in Figure 10, this application embodiment also provides a communication device 1000, including a processor 1001 and a memory 1002. The memory 1002 stores a program or instructions that can run on the processor 1001. When the program or instructions are executed by the processor 1001, they implement the various steps of the above-described perception processing method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0482] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG4. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal may be the sensing processing device shown in FIG8. Specifically, FIG11 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0483] The terminal 1100 includes, but is not limited to, at least some of the following components: radio frequency unit 1101, network module 1102, audio output unit 1103, input unit 1104, sensor 1105, display unit 1106, user input unit 1107, interface unit 1108, memory 1109, and processor 1110.

[0484] Those skilled in the art will understand that terminal 1100 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to processor 1110 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 11 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0485] It should be understood that, in this embodiment, the input unit 1104 may include a graphics processor 11041 and a microphone 11042. The graphics processor 11041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1106 may include a display panel 11061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1107 includes at least one of a touch panel 11071 and other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0486] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1101 can transmit it to the processor 1110 for processing; in addition, the radio frequency unit 1101 can send uplink data to the network-side device. Typically, the radio frequency unit 1101 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0487] The memory 1109 can be used to store software programs or instructions, as well as various data. The memory 1109 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1109 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1109 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0488] Processor 1110 may include one or more processing units; optionally, processor 1110 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1110.

[0489] The radio frequency unit 1101 is used to acquire first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range. M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0490] Processor 1110 is configured to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain;

[0491] The radio frequency unit 1101 is also used to send first data to the second device, the first data being determined based on the target spectrum;

[0492] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0493] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the first device-side method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0494] This application 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 used to run programs or instructions to implement the steps of the method embodiment shown in FIG7. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0495] Specifically, this application embodiment also provides a network-side device, which can be the sensing processing device shown in FIG8 or FIG9. As shown in FIG12, the network-side device 1200 includes: an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204, and a memory 1205. The antenna 1201 is connected to the radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information through the antenna 1201 and sends the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information to be transmitted and sends it to the radio frequency device 1202, which processes the received information and then transmits it through the antenna 1201.

[0496] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1203, which includes a baseband processor.

[0497] The baseband device 1203 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG12. One of the chips is, for example, a baseband processor, which is connected to the memory 1205 via a bus interface to call the program in the memory 1205 to execute the network-side device operation shown in the above method embodiment.

[0498] The network-side device may also include a network interface 1206, such as a Common Public Radio Interface (CPRI).

[0499] Specifically, the network-side device 1200 in this application embodiment further includes: instructions or programs stored in memory 1205 and executable on processor 1204. Processor 1204 calls the instructions or programs in memory 1205 to execute the methods executed by the modules shown in FIG8 or FIG9 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0500] Specifically, this application also provides a network-side device. As shown in FIG13, the network-side device 1300 includes a processor 1301, a network interface 1302, and a memory 1303. The network-side device may be the XX device shown in FIG1. ​​The network interface 1302 is, for example, a Common Public Radio Interface (CPRI).

[0501] Specifically, the network-side device 1300 in this application embodiment further includes: instructions or programs stored in memory 1303 and executable on processor 1301. Processor 1301 calls the instructions or programs in memory 1303 to execute the methods executed by the modules shown in FIG8 or FIG9 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0502] When the network-side device is the first device, the communication interface is used to acquire first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0503] A processor is configured to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain;

[0504] The communication interface is also used to send first data to the second device, the first data being determined based on the target spectrum;

[0505] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0506] When the network-side device is a second device, the network interface is used to send first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain; and receiving first data from the first device, wherein the first data is determined based on the target spectrum obtained by the target transformation.

[0507] Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range.

[0508] The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

[0509] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described perception processing method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0510] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0511] This application embodiment also 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 programs or instructions to implement the various processes of the above-described perception processing method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0512] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0513] This application also provides a computer program / program product, which includes computer instructions. The computer program / program product is executed by at least one processor to implement the various processes of the above-described perception processing method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0514] This application also provides a wireless communication system, including a first device and a second device, wherein the first device can be used to perform the steps of the sensing processing method described above, and the second device can be used to perform the steps of the sensing processing method described above.

[0515] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0516] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they 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 to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0517] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A sensory processing method, wherein, include: The first device acquires first configuration information and first information. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols, wherein N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2. N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first device performs target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain; The first device sends first data to the second device, the first data being determined based on the target spectrum; The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

2. The method according to claim 1, wherein, The first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

3. The method according to claim 1, wherein, The first device acquires the first information including at least one of the following: The first device receives at least a portion of the first information from the second device; The first device receives second information from the second device and determines at least a portion of the content in the first information based on the second information; The second information includes at least one of the following: Latency resolution; Maximum fuzzy measurement range of time delay; Doppler resolution; The maximum ambiguity measurement range of Doppler.

4. The method according to claim 3, wherein, The second information also includes at least one of the following: The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension. The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension. The redundant configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; The redundancy removal reporting process includes at least one of the following: When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported. When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

5. The method according to any one of claims 1 to 4, wherein, The method further includes: The first device sends device capability information to the second device, and the device capability information is used to assist the second device in determining at least a portion of the content in the first information; The device capability information includes at least one of the following: A list of points supported by the IDFT operation for the first device; A list of points for DFT operations supported by the first device.

6. The method according to any one of claims 1 to 3, wherein, The method further includes: The first device sends second data to the second device; wherein, When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used; Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3; Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are: The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported. When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

7. The method according to any one of claims 1 to 6, wherein, The N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain includes any one of the following: When N3 equals N1, perform N3-point IDFT operation directly on the channel matrix of N1 points on each sensing OFDM symbol along the frequency dimension. When N3 is greater than N1, zeros are padded after the channel matrix of N1 points on each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension. When N3 is less than N1, N3 points of the channel matrix are extracted from the N1-point channel matrix of each sensing OFDM symbol, and N3-point IDFT operation is performed along the frequency dimension.

8. The method according to claim 7, wherein, The N3-point channel matrix satisfies at least one of the following: The bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments is greater than or equal to the target bandwidth. The ratio of the bandwidth occupied by the N3 sensing subcarriers corresponding to the N3 point channel moments to the target bandwidth is greater than or equal to the first threshold. The target bandwidth is the minimum bandwidth that meets the latency resolution requirements.

9. The method according to any one of claims 1 to 8, wherein, The M3-point Discrete Fourier Transform (DFT) along the time domain to the Doppler domain includes any of the following: When M3 equals M1, the M3-point DFT operation is performed directly on the channel matrix of M1 point on each sensing subcarrier along the time dimension, or the M3-point DFT operation is performed directly on the M1-point data of each delay unit in the delay spectrum along the time dimension. When M3 is greater than M1, zeros are padded after the M1-point channel matrix on each sensing subcarrier, and M3-point DFT operation is performed along the time dimension; or zeros are padded after the M1-point data on each delay unit in the delay spectrum, and M3-point DFT operation is performed along the time dimension. When M3 is less than M1, the M3 point channel matrix is ​​extracted from the M1 point channel matrix on each sensing subcarrier, and the M3 point DFT operation is performed along the time dimension; or, the M3 point data is extracted from the M1 point data on each delay unit in the delay spectrum, and the M3 point DFT operation is performed along the time dimension.

10. The method according to claim 9, wherein, The M3-point channel matrix or the M3-point data satisfies at least one of the following: The duration occupied by the M3 point channel matrix or the M3 sensing OFDM symbols corresponding to the M3 point data is greater than or equal to the target duration; The ratio of the time occupied by the M3 point channel matrix or the M3 point data corresponding to the M3 sensing OFDM symbols to the target duration is greater than or equal to the second threshold. The target duration is the minimum duration that satisfies the Doppler resolution requirement.

11. The method according to any one of claims 1 to 10, wherein, The N3 is an integer multiple of N; And / or, M3 is an integer multiple of M.

12. The method according to claim 4, wherein, The N time delay units extracted along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay; And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

13. A sensory processing method, wherein, include: The second device sends first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain. The second device receives first data from the first device, the first data being determined based on the target spectrum obtained by the target transformation; Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

14. The method according to claim 13, wherein, The first information includes at least one of the following: N3, M3, M, and N, wherein N3, M3, M, and N are all positive integers.

15. The method according to claim 13, wherein, The second information includes at least one of the following: latency resolution; Maximum fuzzy measurement range of time delay; Doppler resolution; The maximum ambiguity measurement range of Doppler.

16. The method according to claim 15, wherein, The second information also includes at least one of the following: The first indication information is used to indicate that the sensing signal is subjected to redundancy configuration processing and redundancy removal reporting processing in the frequency dimension. The second instruction information is used to instruct the redundancy configuration processing and redundancy removal reporting processing of the sensing signal in the time dimension. The redundant configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; The redundancy removal reporting process includes at least one of the following: when the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported. When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

17. The method according to any one of claims 13 to 16, wherein, The method further includes: The second device receives device capability information from the first device; The second device determines at least a portion of the first information based on the device capability information; The device capability information includes at least one of the following: A list of points supported by the IDFT operation for the first device; A list of points for DFT operations supported by the first device.

18. The method according to claim 13 or 14, wherein, The method further includes: The second device receives second data from the first device; wherein, When the first data includes a time delay spectrum or a time-frequency domain channel matrix with a dimension of N×M1, the second data includes at least one of the following: third indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the frequency dimension, wherein N and N3 are used; Alternatively, if the first data includes a Doppler spectrum or a time-frequency domain channel matrix with dimension N1×M, the second data includes at least one of the following: fourth indication information for indicating redundant configuration processing and deredundancy reporting processing of the sensed signal in the time dimension, wherein M, M3; Alternatively, if the first data includes a time-delay-Doppler spectrum or a time-frequency domain channel matrix of dimension N×M, the second data includes at least one of the following: the third indication information and the fourth indication information, where N, M, N3, and M3 are: The redundancy configuration processing includes at least one of the following: the number of configured sensing subcarriers N1 is greater than N2, and the number of configured sensing OFDM symbols M1 is greater than M2; the redundancy removal reporting processing includes at least one of the following: When the target spectrum is a time delay spectrum of N3×M1, N time delay units are truncated along the time delay dimension to obtain a time delay spectrum of dimension N×M1 as the first data, and then reported. When the target spectrum is a time delay spectrum of N3×M1, N time delay units are extracted along the time delay dimension, and N-point DFT operation is performed along the time delay dimension to obtain a time-frequency domain channel matrix of dimension N×M1 as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension to obtain a Doppler spectrum with a dimension of N1×M as the first data, and then reported. When the target spectrum is an N1×M3 Doppler spectrum, M Doppler units are truncated along the Doppler dimension, and an M-point IDFT operation is performed along the Doppler dimension to obtain a time-frequency domain channel matrix of dimension N1×M as the first data, which is then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and then reported. When the target spectrum is a time-delay-Doppler spectrum of N3×M3, N time-delay units are truncated along the time-delay dimension and M Doppler units are truncated along the Doppler dimension. Then, N-point DFT operation is performed along the time-delay dimension and M-point IDFT operation is performed along the Doppler dimension to obtain a time-delay-Doppler spectrum of dimension N×M as the first data, and it is reported.

19. The method according to any one of claims 13 to 18, wherein, The N3 is an integer multiple of N; And / or, M3 is an integer multiple of M.

20. The method of claim 16, wherein, The N time delay units extracted along the time delay dimension are the first N time delay units in the target spectrum arranged from smallest to largest time delay; And / or, the M Doppler units truncated along the Doppler dimension are the index values ​​in the target spectrum. The corresponding Doppler unit.

21. A sensing processing device, wherein, include: The first receiving module is used to acquire first configuration information and first information, wherein the first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols; The first processing module is used to perform target transformation on the sensing signal received by the first device based on the first information to obtain a target spectrum; the target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to transform to the time delay domain; performing an M3-point discrete Fourier transform (DFT) along the time domain to transform to the Doppler domain; A first transmitting module is used to transmit first data to a second device, wherein the first data is determined based on the target spectrum; Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

22. The apparatus according to claim 21, wherein, The first receiving module is configured to perform at least one of the following: Receive at least a portion of the first information from the second device; Receive second information from the second device, and determine at least a portion of the content in the first information based on the second information; The second information includes at least one of the following: Latency resolution; Maximum fuzzy measurement range of time delay; Doppler resolution; The maximum ambiguity measurement range of Doppler.

23. The apparatus according to claim 21 or 22, wherein, The first sending module is further configured to send device capability information to the second device, the device capability information being used to assist the second device in determining at least a portion of the content in the first information; The device capability information includes at least one of the following: A list of points supported by the IDFT operation for the first device; A list of points for DFT operations supported by the first device.

24. A sensing processing device, wherein, include: The second transmitting module is used to transmit first configuration information and target information to the first device. The first configuration information is used to configure the sensing signal to occupy N1 subcarriers and M1 orthogonal frequency division multiplexing (OFDM) symbols. The target information includes at least a portion of the first information and at least one of the second information. The second information is used to determine at least a portion of the first information, and the first information is used to determine at least one of the target transformation and first data. The target transformation includes at least one of the following: performing an N3-point inverse discrete Fourier transform (IDFT) along the frequency domain to the time delay domain; and performing an M3-point discrete Fourier transform (DFT) along the time domain to the Doppler domain. The second receiving module is configured to receive first data from the first device, wherein the first data is determined based on the target spectrum obtained by the target transformation. Wherein, N1 is greater than or equal to N2, M1 is greater than or equal to M2, and N1*M1 is greater than N2*M2, N2 is the minimum number of sensing subcarriers that meets the requirements of time delay resolution and maximum unambiguous measurement range; M2 is the minimum number of sensing OFDM symbols that meets the requirements of Doppler resolution and maximum unambiguous measurement range. The first data includes any one of the following: a time delay spectrum of dimension N×M1; a time-frequency domain channel matrix of dimension N×M1; a Doppler spectrum of dimension N1×M; a time-frequency domain channel matrix of dimension N1×M; a time delay-Doppler spectrum of dimension N×M; a time-frequency domain channel matrix of dimension N×M; wherein N is less than N3 and M is less than M3.

25. The apparatus according to claim 24, wherein, It also includes a second processing module: The second sending module is further configured to receive device capability information from the first device; The second processing module is used to determine at least a portion of the first information based on the device capability information; The device capability information includes at least one of the following: A list of points supported by the IDFT operation for the first device; A list of points for DFT operations supported by the first device.

26. A terminal, wherein, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the perception processing method as described in any one of claims 1 to 12.

27. A network-side device, wherein, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the perception processing method as described in any one of claims 13 to 20.

28. A readable storage medium, wherein, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the perception processing method as described in any one of claims 1 to 20.

29. A computer program product, wherein, It includes computer instructions that, when executed by a processor, implement the steps of the perception processing method as described in any one of claims 1 to 20.

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