Communication method and device and storage medium

Abstract

The embodiment of the invention provides a communication method and device and a storage medium, and is applied to the technical field of wireless communication. The method comprises: a communication device receiving a first signal, the first signal being used for determining a first distance from the communication device to a detection target; determining a target detection mode according to the first distance; and determining the scattering sectional area of the detection target according to the target detection mode. The communication device in the method can determine a first distance from the communication device to a detection target according to a received first signal, and further determines a scattering cross-sectional area of the detection target according to a target detection mode adapted to the first distance. Thus, the communication device can perceptual the detection target, the accuracy of target perception is improved, and the perception performance of the communication device is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of wireless communication technologies, and in particular, to a communication method, device, and storage medium. Background Art

[0002] With the development of wireless communication technologies, the wireless frequency shows a gradually increasing trend. The increase in the wireless frequency can improve the sensing accuracy of the integrated sensing and communication (ISAC) technology for detection targets.

[0003] However, the current ISAC technology still cannot accurately sense detection targets, thus affecting the sensing performance of communication devices. Summary of the Invention

[0004] Embodiments of the present application provide a communication method, device, and storage medium. A communication device can adapt a target detection mode for determining the scattering cross-section area of a detection target according to the distance from the communication device to the detection target, so that the communication device can sense the detection target in a targeted manner, improve the accuracy of target sensing, and further improve the sensing performance of the communication device.

[0005] To achieve the above object, the embodiments of the present application adopt the following technical solutions: In a first aspect, embodiments of the present application provide a communication method, which can be applied to a communication device. As an example, the communication device may be a network device, a communication module, a circuit or chip responsible for communication functions, a chip system, or other components or assemblies. The communication module, the circuit or chip responsible for communication functions, the chip system, or other components or assemblies may be applied in a network device. The method includes: Receiving a first signal for determining a first distance from the communication device to a detection target; Determining a target detection mode according to the first distance; Determining the scattering cross-section area of the detection target according to the target detection mode.

[0006] Based on the communication method provided by the embodiments of the present application, the communication device can determine the first distance from the communication device to the detection target according to the received first signal, and then determine the scattering cross-section area of the detection target according to the target detection mode adapted to the first distance. In this way, the communication device can sense the detection target in a targeted manner, improve the accuracy of target sensing, and further improve the sensing performance of the communication device.

[0007] In a possible implementation manner in combination with the communication method provided in the first aspect, the foregoing determining a target detection mode according to the first distance may include: When the first distance is less than or equal to the first threshold, the target detection mode is the near-field detection mode; When the first distance is greater than the first threshold, the target detection mode is the far-field detection mode.

[0008] Thus, it is possible to accurately and conveniently determine the target detection mode for determining the scattering cross-section area of the detection target according to the magnitude relationship between the first distance and the first threshold.

[0009] Among them, when the first distance is less than or equal to the first threshold, since the detection target is in the near-field detection area of the communication device, the near-field detection mode is the near-field detection mode.

[0010] Thus, when the detection target is in the near-field detection area, the communication device can determine the scattering cross-section area of the detection target according to the near-field detection mode instead of the far-field detection mode, so as to perceive the detection target in a targeted manner, improve the accuracy of target perception, and further improve the perception performance of the communication device.

[0011] Among them, when the first distance is greater than the first threshold, since the detection target is in the far-field detection area of the communication device, the far-field detection mode is the far-field detection mode.

[0012] Thus, when the detection target is in the far-field detection area, the communication device can determine the scattering cross-section area of the detection target according to the far-field detection mode instead of the near-field detection mode, so as to perceive the detection target in a targeted manner, improve the accuracy of target perception, and further improve the perception performance of the communication device.

[0013] In a possible implementation manner in combination with the communication method provided in the first aspect, before determining the scattering cross-section area of the detection target according to the target detection mode, the communication method may further include: Sending a detection signal; Receiving the echo signal of the detection signal.

[0014] Thus, the communication device can determine information such as the distance, azimuth, and angle of the detection target relative to the communication device according to the echo signal, and further obtain the scattering cross-section area of the detection target.

[0015] In a possible implementation manner, when the first distance is less than or equal to the first threshold, determining the scattering cross-section area of the detection target according to the target detection mode may include: Determining the scattering cross-section area of the detection target according to the near-field detection mode, where the scattering cross-section area may be related to the power compensation factor in the near field, and the power compensation factor in the near field may be related to the antenna array size of the communication device, the wavelength of the detection signal sent by the communication device, and the first distance.

[0016] In a possible implementation, the power compensation factor in the near field range can be an approximate correction based on the empirical formula of the spherical wave propagation amplitude, which can be used to capture the influence of the near field spherical wave on the received power of the communication device. As an example, the aforementioned power compensation factor in the near field range can satisfy the following relationship: ; Wherein, represents the power compensation factor in the near field range, represents the wavelength of the detection signal transmitted by the communication device, represents the first distance, represents the antenna array size of the communication device.

[0017] Thus, in the process of determining the cross-sectional area of the scattering target in the near field detection area, the influence of the power compensation factor in the near field range on the received power of the communication device can be taken into account.

[0018] In a possible implementation, when the first distance is less than or equal to the first threshold, the aforementioned cross-sectional area of the scattering may also be related to at least one of the following parameters: the power of the echo signal received by the communication device for the detection signal, the power when the communication device transmits the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, or the first distance.

[0019] Thus, the cross-sectional area of the scattering target in the near field detection area can be accurately determined by combining at least one of the above parameters.

[0020] In a possible implementation, the cross-sectional area of the scattering can satisfy the following relationship: ; Wherein, represents the power of the echo signal received by the communication device for the detection signal, represents the power when the communication device transmits the detection signal, represents the transmitting antenna gain of the communication device, represents the receiving antenna gain of the communication device, represents the wavelength of the detection signal transmitted by the communication device, represents the first distance, RCS represents the cross-sectional area of the scattering, represents the power compensation factor in the near field range.

[0021] Thus, the communication device can adopt a detection mode adapted to the near field detection area to determine the cross-sectional area of the scattering target in the near field detection area, improve the accuracy of determining the cross-sectional area of the scattering, and further improve the accuracy of the communication device in sensing the detection target, thereby improving the sensing performance of the communication device.

[0022] In a possible implementation, when the first distance is greater than the first threshold, determining the radar cross section (RCS) of the detection target according to the target detection mode may include: Determining the radar cross section (RCS) of the detection target according to the far-field detection mode, where the radar cross section (RCS) may be related to at least one of the following parameters: the power of the echo signal of the detection signal received by the communication device, the power of the detection signal transmitted by the communication device, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, the wavelength of the detection signal transmitted by the communication device, or the first distance.

[0023] In a possible implementation, when the first distance is greater than the first threshold, the radar cross section (RCS) may satisfy the following relationship: ; where represents the power of the echo signal of the detection signal received by the communication device, represents the power of the detection signal transmitted by the communication device, represents the transmitting antenna gain of the communication device, represents the receiving antenna gain of the communication device, represents the wavelength of the detection signal transmitted by the communication device, represents the first distance, and RCS represents the radar cross section (RCS).

[0024] Thus, the communication device can use a detection mode adapted to the far-field detection area to determine the radar cross section (RCS) of the detection target in the far-field detection area, improve the accuracy of determining the radar cross section (RCS), and further improve the accuracy of the communication device in perceiving the detection target, thereby improving the sensing performance of the communication device.

[0025] In a possible implementation, the communication method may further include: Receiving a second signal; Measuring a second distance according to the second signal; Determining a first detection mode according to the second distance; Receiving a third signal; Measuring a third distance according to the third signal; Determining a second detection mode according to the third distance; If the second detection mode is the same as the first detection mode, determining the second detection mode as the target detection mode.

[0026] where the second detection mode and the first detection mode are two adjacent detection modes, and both the second detection mode and the first detection mode may be near-field detection modes or far-field detection modes.

[0027] Thus, by repeatedly confirming the detection mode corresponding to the detection area where the detection target is located, and only taking the determined detection mode as the target detection mode when the detection modes in two adjacent times are the same, it is possible to avoid the problem of inaccurate determination of the target detection mode caused by the detection target repeatedly jumping back and forth at the boundary between the near-field and far-field detection areas. Furthermore, it is possible to improve the accuracy of sensing the detection target, thereby further improving the sensing performance of the communication device.

[0028] In a possible implementation manner, before receiving the second signal, the foregoing communication method may further include: Receiving a fourth signal; Measuring a fourth distance according to the fourth signal; Determining a third detection mode according to the fourth distance, where the third detection mode is different from the first detection mode.

[0029] Wherein, the third detection mode and the first detection mode are adjacent detection modes.

[0030] Thus, by confirming whether the detection modes in two adjacent times are the same, it is possible to avoid the problem of inaccurate determination of the target detection mode caused by the detection target repeatedly jumping back and forth at the boundary between the near-field and far-field detection areas, improve the accuracy of determining the target detection mode, and further improve the accuracy of determining the scattering cross-section area of the detection target according to the target detection mode, thereby improving the accuracy of the communication device in sensing the detection target.

[0031] In a possible implementation manner, the first signal may be a positioning signal sent by the detection target or an echo signal reflected by the detection target.

[0032] Thus, it is possible to facilitate the communication device to determine the distance between the detection target and the communication device (which can be referred to as the detection distance) based on multiple different types of signals, and improve the flexibility of determining the detection distance.

[0033] In a possible implementation manner, the scattering cross-section area may be related to the scattering cross-section area related to the near-field direct echo, and the scattering cross-section area related to the near-field direct echo may be related to the first distance.

[0034] In the embodiments of the present application, the first distance may change as the detection target moves. Correspondingly, the scattering cross-section area related to the near-field direct echo may also change as the first distance changes. In this way, by establishing the correlation between the scattering cross-section area of the detection target and the scattering cross-section area related to the near-field direct echo, it is possible to take into account the change of the scattering cross-section area in the near-field detection area during the process of determining the scattering cross-section area of the detection target, thereby more accurately determining the scattering cross-section area of the detection target in the near-field detection area. Thus, the accuracy of the communication device in sensing the detection target is improved, and further the sensing performance of the communication device is improved.

[0035] In a possible implementation, when the scattering cross-section is related to the scattering cross-section associated with the near-field direct echo, the scattering cross-section can also be related to at least one of the following parameters: the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section associated with the far-field scattered echo.

[0036] Thus, it is possible to take into account the influence of multiple parameters on the scattering cross-section of the detection target in the near-field detection area during the determination of the scattering cross-section, improving the accuracy of determining the scattering cross-section.

[0037] In a possible implementation, the scattering cross-section can satisfy the following relationship: ; where RCS represents the scattering cross-section, A represents the average scattering cross-section, B1 represents the tilt angle correction factor of the detection target, represents the scattering cross-section associated with the near-field direct echo, and C2 represents the scattering cross-section associated with the far-field scattered echo.

[0038] In a possible implementation, the scattering cross-section associated with the near-field direct echo and the first distance can satisfy the following relationship: ; where represents the scattering cross-section associated with the near-field direct echo, represents the first distance, represents the reflection field strength of the communication device, represents the incident field strength at the detection target, represents that the reflection field strength of the communication device is a function related to the first distance, represents that the incident field strength at the detection target is a function related to the first distance, represents the differential element in calculus.

[0039] In a second aspect, embodiments of the present application provide a communication method that can be applied to a communication device. As an example, the communication device can be a network device, a communication module, a circuit or chip responsible for communication functions, a chip system, or other components or assemblies. The communication module, the circuit or chip responsible for communication functions, the chip system, or other components or assemblies can be applied in a network device. The method includes: Receiving a first signal, the first signal being used to determine the first distance from the communication device to the detection target; Determining the scattering cross-section of the detection target, the scattering cross-section being related to the scattering cross-section associated with the near-field direct echo, and the scattering cross-section associated with the near-field direct echo being related to the first distance.

[0040] Based on the communication method provided in the embodiments of the present application, the correlation between the scattering cross-section of the detection target and the near-field direct echo can be established, so that in the process of the communication device sensing the detection target, the characteristics of the detection target within the near-field range can be considered, and the performance of the communication device in sensing the detection target can be improved.

[0041] In a possible implementation manner in combination with the communication method provided in the second aspect, the scattering cross-section may also be related to at least one of the following parameters: the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo.

[0042] Thus, in the process of determining the scattering cross-section, the influence of various parameters on the scattering cross-section of the detection target in the near-field detection area can be considered, and the accuracy of determining the scattering cross-section can be improved.

[0043] In a possible implementation manner, the scattering cross-section may satisfy the following relationship: ; where RCS represents the scattering cross-section, A represents the average scattering cross-section, B1 represents the tilt angle correction factor of the detection target, represents the scattering cross-section related to the near-field direct echo, and C2 represents the scattering cross-section related to the far-field scattered echo.

[0044] In a possible implementation manner, the scattering cross-section related to the near-field direct echo and the first distance may satisfy the following relationship: ; where represents the scattering cross-section related to the near-field direct echo, represents the first distance, represents the reflection field strength of the communication device, represents the incident field strength at the detection target, represents that the reflection field strength of the communication device is a function related to the first distance, represents that the incident field strength at the detection target is a function related to the first distance, represents the differential element in calculus.

[0045] In a third aspect, an embodiment of the present application provides a communication device, which is applied to a communication device. The device includes: a module for executing the method in the first aspect and any possible implementation manner of the first aspect, or a module for executing the method in the second aspect and any possible implementation manner of the second aspect.

[0046] Fourthly, a communication system is provided, including: a communication device, which is configured to execute the method described in the first aspect above, or the communication device is configured to execute the method described in the second aspect above.

[0047] Fifthly, a communication apparatus is provided, which includes: a transceiver, a processor, and a memory. A computer program or instruction is stored in the memory. The processor is configured to control the transceiver to transmit and receive signals, and the processor is configured to call and run the computer program or instruction stored in the memory, so that the processor implements the method in the first aspect above and any possible implementation manner of this aspect, or so that the processor implements the method in the second aspect above and any possible implementation manner of this aspect.

[0048] Sixthly, a communication apparatus is provided, including: a processor; the processor is configured to call a computer program or instruction in a memory, so that the communication apparatus executes the method in the first aspect above and any possible implementation manner of this aspect, or so that the communication apparatus executes the method in the second aspect above and any possible implementation manner of this aspect.

[0049] Optionally, the communication apparatus further includes: a memory, which is configured to store program instructions. The processor is coupled to the memory through an interface.

[0050] Seventhly, a chip device is provided, including a processor, which is configured to call a computer program or instruction in the memory, so that the processor executes the method in the first aspect above and any possible implementation manner of this aspect, or so that the processor executes the method in the second aspect above and any possible implementation manner of this aspect.

[0051] Optionally, the processor is coupled to the memory through an interface.

[0052] Eighthly, a chip is provided, including: an interface circuit and a logic circuit. The interface circuit is configured to receive a signal from another chip outside the chip and transmit it to the logic circuit, or send a signal from the logic circuit to another chip outside the chip. The logic circuit is configured to implement the method in the first aspect above and any possible implementation manner of this aspect, or the logic circuit is configured to implement the method in the second aspect above and any possible implementation manner of this aspect.

[0053] Ninthly, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program or instruction, and the computer program or instruction is configured to execute the method in the first aspect above and any possible implementation manner of this aspect, or the computer program or instruction is configured to execute the method in the second aspect above and any possible implementation manner of this aspect.

[0054] In a tenth aspect, there is provided a computer program product which, when running on a computer, causes the computer to execute the method in the first aspect and any possible implementation manner of this aspect above, or causes the computer to execute the method in the second aspect and any possible implementation manner of this aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 FIG. is a schematic diagram of the architecture of a perception system provided by an embodiment of the present application; Figure 2 FIG. is a schematic diagram of the scene positions of a near field and a far field provided by an embodiment of the present application; Figure 3 FIG. is a schematic flowchart of a communication method provided by an embodiment of the present application; Figure 4 FIG. is an example flowchart for determining whether two consecutively determined detection modes are the same provided by an embodiment of the present application; Figure 5 FIG. is a schematic flowchart of another communication method provided by an embodiment of the present application; Figure 6 FIG. is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the present application; Figure 7 FIG. is a schematic diagram of the hardware structure of another communication device provided by an embodiment of the present application; Figure 8 FIG. is a schematic diagram of the hardware structure of yet another communication device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0056] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Among them, in the description of the embodiments of the present application, unless otherwise specified, "at least one" means one or more, and "a plurality" means two or more than two. In addition, in order to clearly describe the technical solutions in the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. do not necessarily limit to be different. It should also be understood that the term "and / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0057] References to "one embodiment" or "some embodiments" etc. described in the embodiments of the present application mean that specific features, structures or characteristics described in connection with that embodiment are included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in the embodiments of the present application do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways. The term "connection" includes direct connection and indirect connection, unless otherwise stated.

[0058] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplarily" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" is intended to present relevant concepts in a specific manner.

[0059] The embodiments of the present application provide a communication method, which can be applied to a communication system. The communication system may include but is not limited to: wireless communication systems, such as narrow band-Internet of things (NB-IoT) systems, global system for mobile communications (GSM) systems, enhanced data rate for GSM evolution (EDGE) systems, wide band code division multiple access (WCDMA) systems, code division multiple access 2000 (CDMA2000) systems, time division-synchronization code division multiple access (TD-SCDMA) systems, long term evolution (LTE) systems of universal mobile telecommunications technology, fifth generation (5G) wireless communication systems, other wireless communication systems, and future wireless communication systems, etc.

[0060] To facilitate the understanding of the embodiments of the present application, the communication system applicable to the embodiments of the present application will be described first below.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic architecture diagram of a sensing system provided by an embodiment of the present application. Here, the sensing system can be regarded as a communication system in a scenario of integrated communication and sensing. As Figure 1 shown, the sensing system provided by an embodiment of the present application may include: a network device 10 and at least one detection target (detection target 20, detection target 30, and detection target 40), and the detection target can also be referred to as a sensing target. Among them, the network device 10 can communicate with any one of the multiple detection targets (such as detection target 20, detection target 30, and detection target 40), and the network device 10 can also sense information such as the azimuth, distance, and speed of any one of the multiple detection targets (detection target 20, detection target 30, and detection target 40).

[0062] In some examples, the network device 10 can transmit a detection signal (such as an electromagnetic wave) to a detection target (such as detection target 20), receive the echo signal after the detection signal is reflected or scattered by the detection target 20, and then sense information such as the azimuth, distance, and / or speed of the detection target 20 according to the echo signal. In addition, the network device 10 can also monitor, track, identify, image, etc. the detection target, event, or environment. It should be understood that the types of the above detection targets are only examples and do not constitute a limitation to this solution.

[0063] Among them, the network device 10 can be a base station, or a radar, or an access point, or an access network device, or can refer to a device in the access network that communicates with a wireless terminal through one or more cells on the air interface. The network device 10 can be used to mutually convert the received air frame and the Internet Protocol (IP) packet, and act as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an IP network. The network device 10 can also coordinate the attribute management of the air interface. For example, the network device 10 can be a satellite, a drone, a base transceiver station (BTS) in a Global System of Mobile Communication (GSM) or Code Division Multiple Access (CDMA), or a NodeB (NB) in a Wideband Code Division Multiple Access (WCDMA), or an evolved NodeB (eNB or eNodeB) in LTE, or a radio controller in a Cloud Radio Access Network (CRAN) scenario, or a wearable device or a vehicle-mounted device, a vehicle-to-everything (V2X), a device-to-device (D2D) communication, or a machine-to-machine (M2M) communication terminal or relay station or access point that undertakes the base station function, or a base station in a 5G network, such as a gNB, etc., or a base station in a future network, or a network device in a future evolved Public Land Mobile Network (PLMN) network, which is not limited herein.

[0064] In addition, as an example, the network device 10 can be a communication module, a circuit or chip responsible for communication functions, a chip system, or other components or assemblies. The communication module, the circuit or chip responsible for communication functions, the chip system, or other components or assemblies can be applied to the network device.

[0065] The related technologies involved in the embodiments of the present application are introduced below.

[0066] Near Field: It refers to the area relatively close (e.g., less than 1 wavelength) to a radiation source (such as an antenna, a sound source) or a light source. The wavefront of the electromagnetic wave or sound wave in the near field region is a spherical wave.

[0067] Far Field: It refers to the area far from the radiation source. In the far-field area, the wavefront of electromagnetic waves or sound waves is approximately a plane wave.

[0068] Rayleigh Distance: It refers to the demarcation distance used to distinguish the near-field area and the far-field area. When electromagnetic waves or sound waves propagate from the radiation source to the Rayleigh distance, the wavefront form of electromagnetic waves or sound waves can evolve from the complex non-plane wave (i.e., spherical wave) in the near field to the approximate plane wave in the far field. The Rayleigh distance can satisfy the relationship shown in the following formula (1): ; (1) where R represents the Rayleigh distance, represents the wavelength of electromagnetic waves or sound waves, represents the maximum physical size of the radiation source.

[0069] Please refer to Figure 2 , Figure 2 which is a schematic diagram of the scene positions of the near field and the far field provided by the embodiments of the present application. Taking the radiation source as an antenna as an example, as Figure 2 shown, the antenna can emit electromagnetic waves to the detection target in the near-field area or to the detection target in the far-field area. Among them, when the antenna emits electromagnetic waves to the detection target in the far-field area, the detection target may include multiple scattering points, and the echo signals reflected by the multiple scattering points of the detection target can return to the antenna after passing through a cluster.

[0070] In one implementation, the near-field area or the far-field area where the detection target is located can be determined by means of the distance between the radiation source and the detection target and the Rayleigh distance. Exemplarily, if the distance between the radiation source and the detection target is less than or equal to the Rayleigh distance, the detection target is in the near-field area; if the distance between the radiation source and the detection target is greater than the Rayleigh distance, the detection target is in the far-field area.

[0071] In an actual ISAC communication scenario, the communication device can achieve environmental perception by transmitting wireless signals and collecting and analyzing the wireless signals after reflection, scattering, and multipath propagation in the surrounding environment, and obtain information such as the azimuth, distance, or angle of the detection target. However, the position of the detection target may change. For example, the detection target may move from the near-field detection range of the communication device to the far-field detection range of the communication device, or may move from the far-field detection range of the communication device to the near-field detection range of the communication device. The current sensing technology is difficult to avoid the sensing error introduced by the model mismatch caused by the position change of the detection target, thereby affecting the sensing performance.

[0072] To at least solve the above problems, an embodiment of the present application provides a communication method. In this communication method, a communication device can determine a first distance from the communication device to a detection target according to a received first signal, and can specifically determine the radar cross section of the detection target according to a target detection mode adapted to the first distance. In this way, the communication device can specifically perceive the detection target, improve the accuracy of target perception, and further improve the perception performance of the communication device.

[0073] The following will introduce the communication method provided by the embodiment of the present application with reference to the drawings.

[0074] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of a communication method provided by an embodiment of the present application. This communication method can be applied to a perception system as shown in Figure 1 As shown in Figure 3 , this communication method includes: S301. The communication device receives a first signal from a detection target.

[0075] Among them, the communication device may be the network device 10 shown in the foregoing Figure 1 , or may be a communication module, a circuit or chip responsible for the communication function, a chip system, or other components or assemblies. In some examples, the communication device may be a radar, that is, a detection end. In the embodiment of the present application, the communication device is taken as an example of a radar for description.

[0076] The detection target may be various objects in the surrounding environment of the communication device, and the specific type may not be limited. In some examples, the detection target may be an object such as a car, a house, or an unmanned aerial vehicle (UAV).

[0077] In this embodiment, the first signal may be a positioning signal sent by the detection target or an echo signal reflected by the detection target. In this way, it is convenient for the communication device to determine the distance between the detection target and the communication device (which may be referred to as the detection distance) based on various different types of signals, and improve the flexibility of determining the detection distance.

[0078] Among them, the positioning signal may be a global positioning system (GPS) signal sent by the detection target, and the echo signal may be an echo signal after a detection signal (such as an electromagnetic wave or a sound wave, etc.) emitted by the communication device is reflected by the detection target.

[0079] In a possible implementation, the detection target and the communication device can communicate through a mobile network. In this case, the detection target can be configured with a positioning function module, such as a GPS positioning function module or other positioning function modules, so that the detection target can send a first signal to the communication device through the positioning function module.

[0080] In another possible implementation, the detection target and the communication device can communicate through wireless signals. In this case, the communication device can emit detection signals (such as electromagnetic waves or sound waves), and the detection target can reflect (or scatter) the received detection signals to form an echo signal. Thus, the communication device can perceive information such as the azimuth, distance, and angle of the detection target according to the echo signal reflected (or scattered) by the detection target.

[0081] In addition, as an implementation, the first signal can be carried in an existing message or signaling, or can be carried in a separate message or signaling, and the specific transmission form can be not limited.

[0082] The first signal can be used to determine the first distance from the communication device to the detection target. Taking the echo signal of the electromagnetic wave or sound wave reflected by the detection target as an example of the first signal, when the communication device receives the echo signal of the electromagnetic wave or sound wave reflected by the detection target, the communication device can calculate the first distance from the communication device to the detection target by analyzing the time difference of the echo signal.

[0083] Wherein, the first distance represents the distance from the communication device to the detection target, and the first distance can be a constant greater than 0, and the specific value and unit can be not limited.

[0084] In summary, with the help of the first signal, the communication device can know the first distance from the communication device to the detection target.

[0085] S302. The communication device determines a target detection mode according to the first distance.

[0086] In the embodiment of the present application, the target detection mode can be a near-field detection mode or a far-field detection mode.

[0087] In a possible implementation, the target detection mode can be determined according to the first distance, and the target detection modes corresponding to different ranges of the first distance can be different. Specifically, as an implementation, the communication device can compare the first distance with a first threshold, and determine the detection area where the detection target is located according to the comparison result, and then determine the target detection mode according to the detection area where the detection target is located. Wherein, the detection area can include a near-field detection area and a far-field detection area, the first threshold is the critical value of the boundary between the near-field detection area and the far-field detection area, and the specific value of the first threshold can be not limited. In some examples, the first threshold can be , where represents the wavelength of the detection signal sent by the communication device, represents the size of the antenna array of the communication device. Optionally, and can be pre-configured or agreed upon by the protocol, and the specific source may not be limited.

[0088] Optionally, when the first distance is less than or equal to the first threshold, it indicates that the detection target is in the near-field detection area, and the target detection mode is the near-field detection mode at this time; when the first distance is greater than the first threshold, it indicates that the detection target is in the far-field detection area, and the target detection mode is the far-field detection mode at this time.

[0089] In summary, with the help of the first distance and the first threshold, the communication device can accurately and conveniently determine the target detection mode for determining the scattering cross-section area of the detection target.

[0090] In addition, in order to further improve the accuracy of the determined target detection mode, before the communication device receives the first signal, there can be multiple decision processes, which are used to determine whether the detection modes determined continuously twice are the same. The following describes this multiple decision process.

[0091] Please refer to Figure 4 , Figure 4 which is a flowchart example provided by an embodiment of the present application for determining whether the detection modes determined continuously twice are the same. Before the communication device receives the first signal, as Figure 4 shown, it can first receive a second signal, then measure a second distance based on the second signal, and then determine a first detection mode based on the second distance. The first detection mode can be a near-field detection mode or a far-field detection mode. Among them, the second signal can be a positioning signal sent by the detection target or an echo signal reflected by it. The determination method of the second distance is the same as that of the first distance, which will not be elaborated here. Optionally, the accuracy of the first distance in the embodiment of the present application is greater than the accuracy of the second distance.

[0092] In the process of determining the first detection mode according to the second distance, as an implementation, the communication device may compare the second distance with the foregoing first threshold, and determine the first detection mode as a near-field detection mode or a far-field detection mode according to the comparison result. Among them, if the second distance is greater than the first threshold, the first detection mode is a far-field detection mode, and the first detection mode at this time is the same as the foregoing far-field detection mode; if the second distance is less than or equal to the first threshold, the first detection mode is a near-field detection mode, and the first detection mode at this time is the same as the foregoing near-field detection mode. It should be understood that the first detection mode is not adjacent to the foregoing far-field detection mode, or the first detection mode is not adjacent to the foregoing near-field detection mode. Therefore, in order to determine the accurate target detection mode, further judgment is required.

[0093] Further, the communication device may receive a third signal, measure a third distance according to the third signal, and then determine a second detection mode according to the third distance. Among them, the third signal may be a positioning signal or a reflected echo signal sent by the detection target. The determination method of the third distance is the same as that of the second distance and the first distance. The determination method of the second detection mode is the same as that of the first detection mode, and will not be elaborated here. Optionally, in the embodiments of the present application, the accuracy of the third distance is greater than the accuracy of the second distance, and the accuracy of the first distance is greater than the accuracy of the third distance.

[0094] In this embodiment, the second detection mode and the first detection mode are two adjacent detection modes, and the second detection mode is the same as the first detection mode. For example, the second detection mode and the first detection mode may both be a near-field detection mode or a far-field detection mode. Among them, if the second detection mode is the same as the first detection mode, it means that the detection mode of the detection target is correctly determined. At this time, the second detection mode may be determined as the foregoing target detection mode. At this time, the second detection mode may be the foregoing near-field detection mode or far-field detection mode, the third distance may be equivalent to the foregoing first distance, and the third signal may be equivalent to the foregoing first signal.

[0095] In addition, before obtaining two adjacent identical detection modes, there may also be detection modes different from the first detection mode, which will be described below.

[0096] As an implementation manner, before receiving the second signal or when the second detection mode is different from the first detection mode, the communication device may further receive a fourth signal, then measure a fourth distance according to the fourth signal, and then determine a third detection mode according to the fourth distance. In this implementation manner, the third detection mode is adjacent to the first detection mode and the third detection mode is different from the first detection mode. That is to say, when the continuously (adjacent) determined detection modes are the same twice, the determined detection mode will be used as the final target detection mode; otherwise, a detection mode opposite to the first determined detection mode in the continuously determined detection modes twice can be selected to re-perceive the detection area where the detection target is located until the continuously determined detection modes are the same twice. Among them, the accuracy of the second distance is greater than the accuracy of the fourth distance.

[0097] Exemplarily, Table 1 below shows the relationship between the first detection mode determined by the communication device according to the second distance, the second detection mode determined according to the third distance, the third detection mode determined according to the fourth distance, and the target detection mode: Table 1

[0098] As shown in Table 1, when the first detection mode determined by the communication device according to the second distance is the far-field detection mode and the second detection mode determined by the communication device according to the third distance is also the far-field detection mode, since the second detection mode is adjacent to and the same as the first detection mode at this time, the second detection mode (i.e., the far-field detection mode) can be determined as the target detection mode. In this case, before determining the first detection mode according to the second distance, the third detection mode may also be determined according to the fourth distance. As shown in Table 1, the third detection mode at this time is the near-field detection mode, which is different from the first detection mode (far-field detection mode).

[0099] When the first detection mode determined by the communication device according to the second distance is the near-field detection mode and the second detection mode determined by the communication device according to the third distance is the far-field detection mode, since the second detection mode is adjacent to and different from the first detection mode at this time, the third detection mode can be determined according to the fourth distance before determining the first detection mode according to the second distance, and the third detection mode is the detection mode opposite to the first detection mode at this time. As shown in Table 1, when the first detection mode determined by the communication device according to the second distance is the near-field detection mode, the third detection mode is the far-field detection mode, which is opposite to the first detection mode. That is to say, when the second detection mode is different from the first detection mode, a detection mode opposite to the first detection mode can also be selected to re-perceive the detection area where the detection target is located (not shown in Table 1) until the second detection mode the same as the first detection mode is obtained.

[0100] In this way, by repeatedly confirming the detection mode corresponding to the detection area where the detection target is located, and only when the detection modes in two adjacent times are the same, the determined detection mode is used as the target detection mode, it is possible to avoid the problem of inaccurate determination of the target detection mode caused by the detection target repeatedly jumping back and forth at the boundary between the near-field and far-field detection areas. Furthermore, the accuracy of sensing the detection target can be improved, thereby further enhancing the sensing performance of the communication device.

[0101] In addition, the target detection mode can also be determined according to the comparison result between the second distance and the third distance or the comparison result between the second distance and the fourth distance. Exemplarily, if the second distance is the same as the third distance, the detection mode determined according to the second distance or the detection mode determined according to the third distance can be determined as the target detection mode. Optionally, at this time, the detection mode determined according to the second distance and the detection mode determined according to the third distance can be the same.

[0102] S303. The communication device determines the scattering cross-section area of the detection target according to the target detection mode.

[0103] Among them, the scattering cross-section area is a virtual "reflection area" equivalent to the electromagnetic scattering characteristics of the detection target. The scattering cross-section area can be used to measure the reflection ability of the detection target to detection signals such as electromagnetic waves or sound waves. The smaller the scattering cross-section area, the smaller the reflection ability of the detection target to detection signals such as electromagnetic waves or sound waves, and at this time, the intensity of the echo signal corresponding to the detection signal is smaller; the larger the scattering cross-section area, the larger the reflection ability of the detection target to detection signals such as electromagnetic waves or sound waves, and at this time, the intensity of the echo signal corresponding to the detection signal is larger. By determining the scattering cross-section area, it is convenient to estimate the sensing boundary of the detection target.

[0104] In some examples, the scattering cross-section area of the detection target can be the radar cross section (RCS) of the detection target, and the unit of the scattering cross-section area is not limited. For example, it can be square meters (m 2 )

[0105] In the embodiments of the present application, the target detection mode can be used to determine the scattering cross-section area of the detection target. The target detection mode is related to the first distance.

[0106] Before determining the scattering cross-section area of the detection target according to the target detection mode, the communication device can first transmit a detection signal and receive the echo signal of the detection signal. Among them, the detection signal can be an electromagnetic wave signal or a sound wave signal, and the specific type is not limited. By transmitting the detection signal and analyzing the received echo signal, information such as the distance, azimuth, and angle of the detection target relative to the communication device can be obtained, and then the scattering cross-section area of the detection target can be obtained.

[0107] As an implementation manner, when the first distance is less than or equal to the first threshold, the detection target is in the aforementioned near-field detection area. At this time, the communication device can determine the cross-sectional area of the scattering of the detection target according to the near-field detection mode (i.e., the near-field detection mode).

[0108] In addition, in one technical solution, when the detection target is in the near-field detection area, since the detection target may originally be in the far-field detection area and is forced into the near-field detection area due to the expansion of the near-field range caused by the increase in the radio frequency, the cross-sectional area of the scattering of the detection target is still determined according to the far-field detection mode. Compared with this solution, in the present application, when the detection target is in the near-field detection area, the communication device can directly determine the cross-sectional area of the scattering of the detection target according to the near-field detection mode instead of the far-field detection mode, so as to perceive the detection target specifically, improve the accuracy of target perception, and then improve the perception performance of the communication device.

[0109] In addition, when the first distance is less than or equal to the first threshold, the cross-sectional area of the scattering can be related to the power compensation factor in the near-field range. The power compensation factor in the near-field range can be an approximate correction based on the empirical formula of the spherical wave propagation amplitude, and it can be used to capture the influence of the spherical wave in the near-field detection area on the radar receiving power. In one implementation manner, the power compensation factor in the near-field range can be related to the antenna array size of the communication device, the wavelength of the detection signal sent by the communication device, and the aforementioned first distance.

[0110] As an example, the power compensation factor in the near-field range can satisfy the relationship shown in the following formula (2): ; (2) Wherein, represents the power compensation factor in the near-field range, represents the wavelength of the detection signal sent by the communication device, represents the first distance, represents the antenna array size of the communication device.

[0111] In addition, the power compensation factor in the near-field range can be pre-configured or agreed upon by the protocol.

[0112] By introducing the power compensation factor in the near-field range in the near-field detection mode, it is possible to consider the wavefront curvature compensation of the antenna array of the communication device during the process of determining the cross-sectional area of the scattering of the detection target, so as to compensate the power of the echo signal of the detection signal received by the communication device, and then improve the accuracy of determining the cross-sectional area of the scattering of the detection target.

[0113] In addition, when the first distance is less than or equal to the first threshold, the scattering cross-section area can also be related to at least one of the following parameters: the power of the echo signal received by the communication device for the detection signal, the power when the communication device sends the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, the wavelength of the detection signal sent by the communication device, or the first distance. In this way, it is possible to accurately determine the scattering cross-section area of the detection target in the near-field detection area by combining at least one of the above parameters.

[0114] As an example, the scattering cross-section area at this time can satisfy the relationship shown in the following formula (3): ; (3) Wherein, represents the power of the echo signal received by the communication device for the detection signal, represents the power when the communication device sends the detection signal, represents the transmitting antenna gain of the communication device, represents the receiving antenna gain of the communication device, represents the wavelength of the detection signal sent by the communication device, represents the first distance, RCS represents the scattering cross-section area, represents the power compensation factor within the near-field range. In this way, since the communication device can adopt a detection mode adapted to the near-field detection area to determine the scattering cross-section area of the detection target in the near-field detection area, the accuracy of determining the scattering cross-section area can be improved, and then the accuracy of the communication device perceiving the detection target can be improved, thereby improving the sensing performance of the communication device.

[0115] In some examples, the power of the echo signal received by the communication device for the detection signal can be the radar receiving power, the power when the communication device sends the detection signal can be the radar transmitting power, the transmitting antenna gain of the communication device can be the radar transmitting antenna gain, the receiving antenna gain of the communication device can be the radar receiving antenna gain, and the wavelength of the detection signal sent by the communication device can be the radar detection signal wavelength.

[0116] Among them, at least one of the parameters such as the power of the echo signal received by the communication device for the detection signal, the power when the communication device sends the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, the wavelength of the detection signal sent by the communication device, or the first distance can be pre-configured or agreed upon by the protocol, and specific details can be not limited.

[0117] As another implementation manner, when the first distance is greater than the first threshold, the detection target is in the aforementioned far-field detection area. At this time, the communication device can determine the scattering cross-section area of the detection target according to the far-field detection mode.

[0118] In addition, in a technical solution, when the detection target is forced to be in the near-field detection area due to the expansion of the near-field range caused by the increase in the radio frequency, the radar cross section (RCS) of the detection target is determined according to the far-field detection mode. Compared with this solution, in the present application, when the detection target is truly in the far-field detection area, the communication device determines the RCS of the detection target according to the far-field detection mode, so that the detection target can be effectively sensed, the accuracy of target sensing can be improved, and further the sensing performance of the communication device can be improved.

[0119] In addition, when the first distance is greater than the first threshold, the RCS may be related to at least one of the following parameters: the power of the echo signal of the detection signal received by the communication device, the power when the communication device sends the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, the wavelength of the detection signal sent by the communication device, or the first distance. In this way, the RCS of the detection target in the far-field detection area can be accurately determined by combining at least one of the above parameters.

[0120] As an example, the RCS at this time may satisfy the relationship shown in the following formula (4): ; (4) Wherein, represents the power of the echo signal of the detection signal received by the communication device, represents the power when the communication device sends the detection signal, represents the transmitting antenna gain of the communication device, represents the receiving antenna gain of the communication device, represents the wavelength of the detection signal sent by the communication device, represents the aforementioned first distance, and RCS represents the radar cross section. In this way, since the communication device can adopt a detection mode adapted to the far-field detection area to determine the RCS of the detection target in the far-field detection area, the accuracy of determining the RCS can be improved, and further the accuracy of the communication device in sensing the detection target can be improved, thereby improving the sensing performance of the communication device.

[0121] In this way, since the detection area where the detection target is located can be determined according to the comparison result between the first distance and the first threshold, when the detection target is in the near-field detection area, the near-field detection mode can be adopted instead of the far-field detection mode to determine the RCS of the detection target, so that the computational complexity can be saved; when the detection target is in the far-field detection area, the far-field detection mode can be adopted instead of the near-field detection mode to determine the RCS of the detection target, so that the sensing accuracy can be improved.

[0122] In addition, the scattering cross-section in the embodiments of the present application may also be related to the scattering cross-section related to the near-field direct echo. Optionally, the scattering cross-section related to the near-field direct echo may be pre-configured or agreed upon by a protocol.

[0123] When the scattering cross-section is related to the scattering cross-section related to the near-field direct echo, the scattering cross-section may also be related to at least one of the following parameters: the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo. Among them, the average scattering cross-section may be the average of the scattering cross-sections corresponding to at least one scattering point of the detection target. In this way, it is possible to take into account the influence of various parameters on the scattering cross-section of the detection target in the near-field detection area during the determination of the scattering cross-section, and improve the accuracy of determining the scattering cross-section.

[0124] As an example, the scattering cross-section at this time may satisfy the relationship shown in the following formula (5): ; (5) where A represents the average scattering cross-section, B1 represents the tilt angle correction factor of the detection target, represents the scattering cross-section related to the near-field direct echo, and C2 represents the scattering cross-section related to the far-field scattered echo.

[0125] In addition, at least one of the parameters such as the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo may be pre-configured or agreed upon by a protocol, and specific limitations may not be made.

[0126] Among them, the scattering cross-section related to the near-field direct echo may be related to the aforementioned first distance.

[0127] As an implementation manner, the scattering cross-section related to the near-field direct echo and the first distance may satisfy the relationship shown in the following formula (6): ; (6) where represents the scattering cross-section related to the near-field direct echo, represents the first distance, represents the reflection field strength of the communication device, represents the incident field strength at the detection target, represents the differential element in calculus. represents that the reflection field strength of the communication device is a function related to the first distance, represents that the incident field strength at the detection target is a function related to the first distance.

[0128] where and It can be pre-configured or agreed upon by the protocol, and specific limitations may not be made.

[0129] In the embodiments of the present application, the first distance can change as the detection target moves. Correspondingly, the scattering cross-section related to the near-field direct echo can also change with the change of the first distance. In this way, by establishing the correlation between the scattering cross-section of the detection target and the scattering cross-section related to the near-field direct echo, it is possible to consider the change of the scattering cross-section in the near-field detection area during the process of determining the scattering cross-section of the detection target, so as to more accurately determine the scattering cross-section of the detection target in the near-field detection area. Thus, the accuracy of the communication device in sensing the detection target is improved, and further the sensing performance of the communication device is improved.

[0130] In addition, the numerical value of the scattering cross-section can be used to reflect the distance between the communication device and the detection target. The smaller the scattering cross-section, the closer the distance between the communication device and the detection target; the larger the scattering cross-section, the farther the distance between the communication device and the detection target.

[0131] In summary, through the communication method provided by the embodiments of the present application, the communication device can determine the first distance from the communication device to the detection target according to the received first signal, and then determine the scattering cross-section of the detection target according to the target detection mode matching the first distance. In this way, the communication device can specifically match the target detection mode for determining the scattering cross-section of the detection target according to the distance between the communication device and the detection target, improve the accuracy of target detection, and further improve the sensing performance of the communication device.

[0132] In addition, in the embodiments of the present application, the scattering cross-section of the detection target can also be related to the near-field direct echo, and the near-field direct echo occurs in the aforementioned near-field detection area. The scattering cross-section in this case will be described below.

[0133] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of another communication method provided by the embodiments of the present application. This communication method can be applied to a communication system as shown in Figure 1 As shown in Figure 5 , this communication method includes: S501. The communication device receives a first signal from the detection target.

[0134] Among them, the specific implementation of S501 can refer to the relevant description of S301 above and will not be elaborated here.

[0135] S502. The communication device determines the scattering cross-section of the detection target.

[0136] Among them, the scattering cross-section can be related to the scattering cross-section related to the near-field direct echo.

[0137] Optionally, the scattering cross-section related to the near-field direct echo may be pre-configured or agreed upon by a protocol.

[0138] When the scattering cross-section is related to the scattering cross-section related to the near-field direct echo, the scattering cross-section may also be related to at least one of the following parameters: the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo. In this way, it is possible to take into account the influence of multiple parameters on the scattering cross-section of the detection target in the near-field detection area during the determination of the scattering cross-section, improving the accuracy of determining the scattering cross-section.

[0139] As an example, the scattering cross-section at this time may satisfy the relationship shown in the following formula (7): ; (7) where RCS represents the scattering cross-section, A represents the average scattering cross-section, B1 represents the tilt angle correction factor of the detection target, represents the scattering cross-section related to the near-field direct echo, and C2 represents the scattering cross-section related to the far-field scattered echo.

[0140] In addition, at least one of the parameters such as the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo may be pre-configured or agreed upon by a protocol, and specific details may not be limited.

[0141] Among them, the scattering cross-section related to the near-field direct echo may be related to the aforementioned first distance.

[0142] As an implementation manner, the scattering cross-section related to the near-field direct echo and the first distance may satisfy the relationship shown in the following formula (8): ; (8) where represents the scattering cross-section related to the near-field direct echo, represents the first distance, represents the reflection field strength of the communication device, represents the incident field strength at the detection target, represents the differential element in calculus, represents that the reflection field strength of the communication device is a function related to the first distance, represents that the incident field strength at the detection target is a function related to the first distance. Among them, and may be pre-configured or agreed upon by a protocol, and specific details may not be limited.

[0143] In the embodiments of the present application, the first distance can change as the detection target moves. Correspondingly, the scattering cross-section related to the near-field direct echo can also change with the change of the first distance. In this way, by establishing the correlation between the scattering cross-section of the detection target and the scattering cross-section related to the near-field direct echo, it is possible to take into account the change of the scattering cross-section in the near-field detection area during the process of determining the scattering cross-section of the detection target, so as to more accurately determine the scattering cross-section of the detection target in the near-field detection area. Thus, the accuracy of the communication device in sensing the detection target is improved, and further the sensing performance of the communication device is improved.

[0144] In the embodiments of the present application, the numerical value of the scattering cross-section can be used to reflect the distance between the communication device and the detection target. The smaller the scattering cross-section, the closer the distance between the communication device and the detection target; the larger the scattering cross-section, the farther the distance between the communication device and the detection target.

[0145] In addition, the communication method provided by the embodiments of the present application is not only applicable to the ISAC communication scenario, but also applicable to the V2X scenario, or can be applicable to other scenarios that require sensing or detecting the detection target, and the specific situation can not be limited.

[0146] In summary, through the communication method provided by the embodiments of the present application, the correlation between the scattering cross-section of the detection target and the near-field direct echo can be established, so that during the process of the communication device sensing the detection target, the characteristics of the detection target in the near-field range can be taken into account, and the performance of target detection can be improved.

[0147] As described above in conjunction with Figures 3 - 5 The communication method provided by the embodiments of the present application has been described in detail. Next, a communication device for executing the communication method provided by the embodiments of the present application will be described in detail in conjunction with Figures 6 - 8 It should be understood that the communication device of the embodiments of the present application can execute various communication methods of the foregoing embodiments of the present application, that is, the specific working processes of the following various products can refer to the corresponding processes in the foregoing method embodiments. In the foregoing embodiments, the terminal device can execute some or all of the steps in each embodiment; the network device can execute some or all of the steps in each embodiment. These steps or operations are only examples, and the embodiments of the present application can also execute other operations or various deformations of the operations. In addition, the various steps can be executed in different orders presented in each embodiment, and it is possible not to execute all the operations in the embodiments of the present application. Moreover, the magnitude of the sequence numbers of the various steps does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0148] Exemplarily, please refer to Figure 6 , Figure 6Schematic diagram of the hardware structure of a communication device provided by an embodiment of the present application. As Figure 6 shown, the communication device 600 includes: a processing module 601 and a transceiver module 602. For ease of explanation, Figure 6 only the main components of the communication device are shown.

[0149] In some embodiments, the communication device 600 may be applicable to Figure 1 the communication system shown in Figures 3 - 5 and perform the functions of a communication device in the communication method shown in

[0150] In this case, the transceiver module 602 is used to receive a first signal, and the first signal is used to determine a first distance from the communication device to the detection target.

[0151] The transceiver module 602 is also used to receive a second signal, receive a third signal, and receive a fourth signal.

[0152] The processing module 601 is used to determine a target detection mode according to the first distance.

[0153] The processing module 601 is also used to determine the scattering cross-sectional area of the detection target according to the target detection mode.

[0154] The processing module 601 is also used to measure a second distance according to the second signal; determine a first detection mode according to the second distance.

[0155] The processing module 601 is also used to measure a third distance according to the third signal; determine a second detection mode according to the third distance, and the second detection mode is the same as the first detection mode; determine the second detection mode as the target detection mode.

[0156] The processing module 601 is also used to measure a fourth distance according to the fourth signal; determine a third detection mode according to the fourth distance, and the third detection mode is different from the first detection mode.

[0157] In addition, the processing module 601 may also be used to determine the scattering cross-sectional area of the detection target, the scattering cross-sectional area is related to the scattering cross-sectional area related to the near-field direct echo, and the scattering cross-sectional area related to the near-field direct echo is related to the first distance.

[0158] Optionally, the transceiver module 602 may include a receiving module and a transmitting module ( Figure 6 not shown in

[0159] Optionally, the communication device 600 may further include a storage module ( Figure 6(not shown in the figure), the storage module stores programs or instructions. When the processing module 601 executes the programs or instructions, the communication device 600 can perform Figures 3 - 5 the functions of the communication device in any of the communication methods shown.

[0160] It should be understood that the communication device 600 can be a communication device, a communication module, a circuit or chip responsible for communication functions, a chip system, or other components or assemblies. The communication module, the circuit or chip responsible for communication functions, the chip system, or other components or assemblies can be applied to the communication device. The present application does not make any limitations in this regard.

[0161] In addition, for the technical effects of the communication device 600, reference can be made to Figures 3 - 5 the technical effects of any of the communication methods shown, which will not be elaborated here.

[0162] It should be understood that the processing module 601 involved in the communication device 600 can be implemented by a processor or processor-related circuit components, and can be a processor or a processing unit; the transceiver module 602 can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or a transceiver unit.

[0163] Exemplarily, an embodiment of the present application further provides a communication device.

[0164] Please refer to Figure 7 , Figure 7 which is a schematic diagram of the hardware structure of another communication device provided by an embodiment of the present application.

[0165] As Figure 7 shown, the communication device 700 includes a processor 701, the processor 701 is coupled to a memory 702, the memory 702 is used to store computer programs or instructions and / or data, and the processor 701 is used to execute the computer programs or instructions and / or data stored in the memory 702, so that the methods in the foregoing method embodiments are executed.

[0166] Optionally, the processor 701 included in the communication device 700 is one or more.

[0167] Optionally, as Figure 7 shown, the communication device 700 may further include a memory 702.

[0168] Optionally, the memory 702 included in the communication device 700 can be one or more.

[0169] Optionally, the memory 702 can be integrated with the processor 701 or separately provided.

[0170] As Figure 7As shown, the communication device 700 may further include a transceiver 703 for receiving and / or transmitting signals. For example, the processor 701 is used to control the transceiver 703 to receive and / or transmit signals.

[0171] As a solution, the communication device 700 is used to implement the operations performed by the communication device in the foregoing method embodiments.

[0172] For example, the processor 701 is used to implement the processing-related operations performed by the communication device in the foregoing method embodiments, and the transceiver 703 is used to implement the transceiver-related operations performed by the communication device in the foregoing method embodiments.

[0173] The above Figure 7 In the communication device shown above, the device in the transceiver 703 for receiving power can be regarded as a receiving unit, and the device in the transceiver 703 for the sending function can be regarded as a sending unit. That is, the transceiver 703 may include a receiver and a transmitter. The transceiver 703 may also be referred to as a transceiver, a transceiver unit, or a transceiver circuit, etc. The receiver may also be referred to as a receiver, a receiving unit, a receiver, or a receiving circuit, etc. The transmitter may also be referred to as a transmitter, a transmitter unit, or a transmitting circuit, etc. The processor 701 has a processing function, and the processor 701 may be referred to as a processing unit. The memory 702 is used to store computer program codes and data, and the memory 702 may also be referred to as a storage unit.

[0174] Exemplarily, an embodiment of the present application further provides a communication device.

[0175] Please refer to Figure 8 , Figure 8 which is a schematic hardware structure diagram of another communication device provided by the embodiment of the present application.

[0176] As Figure 8 shown, the communication device 800 may be a communication device or a chip of a communication device. The communication device 800 may be used to perform the operations performed by the communication device in the above method embodiments.

[0177] The communication device 800 includes a section 810, a section 820, and a section 830. The section 810 is mainly used for baseband processing and controlling the base station, etc.; the section 810 is usually the control center of the base station and can usually be referred to as a processor or a processing unit, which is used to control the communication device to execute the processing operations of the communication device in the above method embodiments. The section 820 is mainly used for storing computer program codes and data and can usually be referred to as a memory or a storage unit. The section 830 is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals; the section 830 can usually be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The section 830 includes an antenna 833 and a radio frequency circuit (not shown in the figure), where the radio frequency circuit is mainly used for radio frequency processing.

[0178] Optionally, the devices used to implement the receiving function in the section 830 can be regarded as a receiver, and the devices used to implement the transmitting function can be regarded as a transmitter, that is, the section 830 includes a receiver 832 and a transmitter 831. The receiver can also be referred to as a receiving unit, a receiver, or a receiving circuit, etc., and the transmitter can be referred to as a transmitting unit, a transmitting unit, a transmitter, or a transmitting circuit, etc.

[0179] The section 810 and the section 820 can include one or more single boards, and each single board can include one or more processors and one or more memories. The processor is used to read and execute the programs in the memory to implement the baseband processing function and the control of the base station. If there are multiple single boards, the single boards can be interconnected to enhance the processing ability.

[0180] As an alternative implementation, it can also be that multiple single boards share one or more processors, or multiple single boards share one or more memories, or multiple single boards share one or more processors simultaneously.

[0181] In one implementation, the transceiver unit of the section 830 is used to execute Figures 3 - 5 the transceiver-related processes executed by the communication device in the illustrated embodiment. The processor of the section 810 is used to execute Figures 3 - 5 the processing-related processes executed by the communication device in the illustrated embodiment.

[0182] It should be understood that Figure 8 only for illustration and not limitation, the above communication device including a processor, a memory, and a transceiver may not depend on Figure 8 the structure shown.

[0183] When the communication device 800 is a chip, the chip includes a transceiver, a memory, and a processor. Among them, the transceiver can be an input / output circuit or a communication interface; the processor is the processor, microprocessor, or integrated circuit integrated on the chip.

[0184] In the method embodiments above, the transmission operation of the communication device can be understood as the output of the chip, and the reception operation of the communication device in the method embodiments above can be understood as the input of the chip.

[0185] Exemplarily, an embodiment of the present application further provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the communication device in the above method embodiments are stored.

[0186] For example, when the computer program is executed by a computer, the computer can implement the method executed by the communication device in the above method embodiments.

[0187] Exemplarily, an embodiment of the present application further provides a computer program product containing instructions, which when executed by a computer cause the computer to implement the method executed by the communication device in the above method embodiments.

[0188] Exemplarily, an embodiment of the present application further provides a communication system, which includes a communication device. The communication device is used to execute the process executed by the communication device in the foregoing embodiments.

[0189] Exemplarily, an embodiment of the present application further provides a chip device, including a processor, which is used to call the computer program or computer instructions stored in the memory, so that the processor executes the method in the above embodiments.

[0190] In a possible implementation manner, the input of the chip device corresponds to the reception operation in the above Figures 3 - 5 shown embodiments, and the output of the chip device corresponds to the transmission operation in the above Figures 3 - 5 shown embodiments.

[0191] Optionally, the processor is coupled to the memory through an interface.

[0192] Optionally, the chip device further includes a memory, in which a computer program or computer instructions are stored.

[0193] Wherein, the processor mentioned anywhere above can be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the method in the foregoing embodiments. The memory mentioned anywhere above can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc.

[0194] Those skilled in the art can clearly understand that for the sake of convenience and conciseness of description, the explanations and beneficial effects of the relevant content in any of the above-mentioned communication devices can refer to the corresponding method embodiments provided above, and will not be elaborated here.

[0195] In the embodiments of the present application, a communication device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory). The operating system in the operating system layer may be any one or more computer operating systems that implement service processing through processes. For example, the Linux operating system, the Unix operating system, the Android operating system, the iOS operating system, or the windows operating system, etc. The application layer may include applications such as a browser, an address book, a word processing software, an instant messaging software, etc.

[0196] Those skilled in the art can clearly understand that for the sake of convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated here.

[0197] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in an electrical, mechanical, or other form.

[0198] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

[0199] In addition, the functional units in the various embodiments of the present application may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0200] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the part that essentially contributes to the technical solution of the embodiments of the present application, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the processes of the methods of the embodiments of the present application. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks, or optical discs.

[0201] The above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method, characterized in that Applied to a communication device, the method includes: Receiving a first signal for determining a first distance from the communication device to a detection target; Determining a target detection mode according to the first distance; Determining a radar cross section (RCS) of the detection target according to the target detection mode.

2. The method according to claim 1, characterized in that, The determining the target detection mode according to the first distance includes: When the first distance is less than or equal to a first threshold, the target detection mode is a near-field detection mode; When the first distance is greater than the first threshold, the target detection mode is a far-field detection mode.

3. The method according to claim 2, wherein Before determining the radar cross section (RCS) of the detection target according to the target detection mode, the method further includes: Sending a detection signal; Receiving an echo signal of the detection signal.

4. The method according to claim 3, wherein The determining the radar cross section (RCS) of the detection target according to the target detection mode includes: Determining the radar cross section (RCS) of the detection target according to the near-field detection mode, where the radar cross section (RCS) is related to a power compensation factor within a near field, and the power compensation factor within the near field is related to the size of an antenna array of the communication device, the wavelength of the detection signal, and the first distance.

5. The method according to claim 4, characterized in that, The power compensation factor within the near field satisfies the following relationship: ； Among them, the represents the power compensation factor within the near field range, the represents the wavelength of the detection signal, the represents the first distance, and the represents the antenna array size of the communication device.

6. The method according to claim 4 or 5, characterized in that, When the first distance is less than or equal to the first threshold, the radar cross section (RCS) is further related to at least one of the following parameters: the power of the communication device receiving the echo signal of the detection signal, the power of the communication device when sending the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, or the first distance.

7. The method according to claim 6, wherein The radar cross section (RCS) satisfies the following relationship: ； Among them, the represents the power of the echo signal received by the communication device for the detection signal, the represents the power when the communication device sends the detection signal, the represents the transmitting antenna gain of the communication device, the represents the receiving antenna gain of the communication device, the represents the wavelength of the detection signal, the represents the first distance, the represents the scattering cross section area, the represents the power compensation factor within the near field range.

8. The method according to claim 3, characterized in that, The determining the radar cross section (RCS) of the detection target according to the target detection mode includes: Determining the radar cross section (RCS) of the detection target according to the far-field detection mode, where the radar cross section (RCS) is related to at least one of the following parameters: the power of the communication device receiving the echo signal of the detection signal, the power of the communication device when sending the detection signal, the transmitting antenna gain of the communication device, the receiving antenna gain of the communication device, the wavelength of the detection signal, or the first distance.

9. The method according to claim 8, wherein The radar cross section (RCS) satisfies the following relationship: ； Among them, the represents the power of the echo signal received by the communication device for the detection signal, and the represents the power when the communication device sends the detection signal, and the represents the transmitting antenna gain of the communication device, and the represents the receiving antenna gain of the communication device, and the represents the wavelength of the detection signal, and the represents the first distance, and the represents the scattering cross section area.

10. The method according to claim 1, wherein The method further includes: Receiving a second signal; Measuring a second distance according to the second signal; Determining a first detection mode according to the second distance; Receiving a third signal; Measuring a third distance according to the third signal; Determining a second detection mode according to the third distance; If the second detection mode is the same as the first detection mode, determining the second detection mode as the target detection mode.

11. The method according to claim 10, characterized in that, Before receiving the second signal, the method further includes: Receiving a fourth signal; Measuring a fourth distance according to the fourth signal; Determining a third detection mode according to the fourth distance, where the third detection mode is different from the first detection mode.

12. The method according to claim 11, wherein The first signal is a positioning signal sent by the detection target or a reflected echo signal.

13. A communication method, characterized in that, Applied to a communication device, the method includes: Receiving a first signal for determining a first distance from the communication device to a detection target; Determine the scattering cross-section of the detection target, where the scattering cross-section is related to the scattering cross-section related to the near-field direct echo, and the scattering cross-section related to the near-field direct echo is related to the first distance.

14. The method according to claim 13, characterized in that, The scattering cross-section is further related to at least one of the following parameters: the average scattering cross-section, the tilt angle correction factor of the detection target, or the scattering cross-section related to the far-field scattered echo.

15. The method according to claim 14, characterized in that, The scattering cross-section satisfies the following relationship: ； Wherein, the represents the scattering cross section area, the A represents the average scattering cross section area, the B1 represents the tilt angle correction factor of the detection target, and the represents the scattering cross section area related to the near-field direct echo, and the C2 represents the scattering cross section area related to the far-field scattered echo.

16. The method according to claim 15, wherein The scattering cross-section related to the near-field direct echo and the first distance satisfy the following relationship: ； Among them, the represents the scattering cross-sectional area related to the near-field direct echo, the represents the first distance, the represents the reflected field strength of the communication device, the represents the incident field strength at the detection target, the represents that the reflected field strength of the communication device is a function related to the first distance, the represents that the incident field strength at the detection target is a function related to the first distance, the represents the differential element in calculus.

17. A communication device, characterized in that, Comprising: A module for executing the method according to any one of claims 1-12, or a module for executing the method according to any one of claims 13-16.

18. A communication system, characterized in that, Comprising: A communication device for executing the method according to any one of claims 1-12, or a communication device for executing the method according to any one of claims 13-16.

19. A communication device, characterized in that, Comprising: At least one processor and an interface circuit, where the interface circuit is configured to receive signals from other communication devices outside the communication device and transmit them to the processor, or send signals from the processor to other communication devices outside the communication device, and the processor is configured to implement the method according to any one of claims 1-12 through logic circuits or by executing code instructions, or the processor is configured to implement the method according to any one of claims 13-16 through logic circuits or by executing code instructions.

20. A computer-readable storage medium, characterized in that, Comprising a computer program or instruction, when the computer program or instruction runs on a computer, causing the computer to execute the method according to any one of claims 1-12, or causing the computer to execute the method according to any one of claims 13-16.

21. A chip, characterized in that, Comprising: An interface circuit and a logic circuit, where the interface circuit is configured to receive signals from other chips outside the chip and transmit them to the logic circuit, or send signals from the logic circuit to other chips outside the chip, and the logic circuit is configured to implement the method according to any one of claims 1-12, or the logic circuit is configured to implement the method according to any one of claims 13-16.

22. A computer program product, characterized in that, The computer program product comprises: a computer program or instruction, when the computer program or instruction runs on a computer, causing the computer to execute the method according to any one of claims 1-12, or causing the computer to execute the method according to any one of claims 13-16.

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