Communication method and communication device

Abstract

The embodiment of the present application discloses a communication method and a communication device, so that the communication device performs sensing of the surrounding environment while performing communication. The method of the embodiment of the present application includes: a first communication device determines a first frequency domain resource, and the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter; the first communication device sends a sensing signal on the first frequency domain resource.

Description

[Technical Field]

[0001] The present application relates to communication technologies, and in particular to communication methods and devices. [Background technology]

[0002] This application claims priority to Chinese Patent Application No. 202110321050.X, entitled "COMMUNICATION METHOD AND COMMUNICATION APPARATUS," filed with the State Intellectual Property Office of China on March 25, 2021, which is incorporated herein by reference in its entirety.

[0003] In wireless sensing technology, the changes in wireless signals during propagation are analyzed to obtain the characteristics of the signal transmission space in order to sense objects or people in the environment. For example, wireless sensing technology is used to sense people, buildings, vehicles, etc. in the environment.

[0004] Radar is a classic wireless sensing technology that is widely used in military, agriculture, meteorology, and other fields. The basic principle of radar is as follows: a transmitter transmits a specific waveform signal, and after the transmitted signal passes through a wireless channel, the signal is received by a receiver. Signal processing is performed on the transmitted signal and the received signal to extract the target of interest in the wireless channel. The main function of a wireless communication system is to exchange information between transceivers, and the basic principle of a wireless communication system is as follows: a transmitter transmits a specific waveform signal, and after the transmitted signal passes through a wireless channel, the signal is received by a receiver. After signal processing, the signal transmitted by the transmitter is obtained by demodulation.

[0005] From the viewpoint of processing including transmitting, receiving, etc., radar sensing processing can be understood to be very similar to wireless communication processing. Therefore, how to integrate wireless communication and sensing technology to perform sensing of the surrounding environment while performing wireless communication is currently an urgent issue to be solved. Summary of the Invention

[0006] The embodiments of the present application provide a communication method and a communication device, so that the communication device performs sensing of the surrounding environment while performing communication, and further, communication resources are determined with reference to sensing requirement parameters, so that the sensing requirements can be met and the sensing performance can be improved.

[0007] According to a first aspect of an embodiment of the present application, there is provided a communication method, the method including:

[0008] The first communication device determines a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter, and then sends a sensing signal on the first frequency domain resource.

[0009] In this embodiment, a first frequency domain resource is selected from a frequency domain resource pool based on a sensing requirement parameter. The first communication device may send a sensing signal on the first frequency domain resource. In this manner, the first communication device may perform sensing of the surrounding environment by sending the sensing signal while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this manner, the sensing requirement can be met and sensing performance can be improved.

[0010] In a possible implementation, the sensing requirement parameters include at least one of a clear ranging distance or ranging resolution.

[0011] In this implementation, the sensing requirement parameter is provided with content specifically included therein, which indicates a requirement for performing sensing ranging using the sensing signal. In other words, the sensing requirement parameter indicates a requirement for the first communication device or the second communication device to perform sensing ranging using the sensing signal.

[0012] In another possible implementation, the method further includes: the first communication device obtaining a sensing requirement parameter. The first communication device determining a first frequency domain resource includes: the first communication device determining the first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0013] In this possible implementation, a specific implementation is provided in which the first communication device determines the first frequency domain resource. The first communication device may obtain a sensing requirement parameter and determine the first frequency domain resource by referring to the sensing requirement parameter. In this way, the sensing requirement can be satisfied and the sensing performance can be improved.

[0014] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0015] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0016] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0017] In this possible implementation, multiple possible implementations of the content that is particularly included in the sensing requirement parameters and the requirements that the first frequency domain resource must meet in these implementations are provided.

[0018] In another possible implementation, the first frequency domain resource includes a frequency point combination that satisfies a first condition, where a frequency baseline formed by frequency points included in the frequency point combination includes a frequency baseline of a first length, where the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], where K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and where K is greater than or equal to 1.

[0019] In this possible implementation, the first frequency domain resource includes a frequency point combination, and the frequency point combination obtained in the above implementation can satisfy that the frequency baseline formed by the frequency point combination has complete frequency coverage, in other words, the frequency point combination satisfies the coverage completeness requirement. In this way, sensing ranging can be performed on multiple sensing target points in the surrounding environment, and sensing performance can be further improved.

[0020] In another possible implementation, the frequency point combination includes a subcarrier combination, which is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

[0021] In this possible implementation, there may be multiple subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition. In this case, the subcarrier combination may be the subcarrier combination with the minimum number of subcarriers among the multiple subcarrier combinations. In this way, the subcarrier combination with the minimum number of subcarriers is selected under the condition that the maximum frequency baseline and the minimum frequency baseline are satisfied and complete frequency baseline coverage is ensured, thereby effectively reducing subcarrier overhead in the frequency domain. This avoids occupying excessive communication resources and affecting communication performance.

[0022] In another possible implementation, the method further includes: the first communication device sending first information to the second communication device, where the first information indicates a frequency domain location of the first frequency domain resource.

[0023] In this possible implementation, the first communication device indicates the frequency domain location of the first frequency domain resource to the second communication device. In this way, the second communication device can transmit the sensing signal to the frequency domain location of the first frequency domain resource. position to perform sensing measurements of the surrounding environment.

[0024] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0025] In this possible implementation, two specific implementations are provided in which the first information indicates the frequency domain location of the first frequency domain resource. Specifically, the first information may directly indicate the frequency domain location of the first frequency domain resource, and the indication method is simple. Alternatively, the first information may indirectly indicate the frequency domain location of the first frequency domain resource using an index method, and this indication method may require a small number of indication bits, thereby reducing the overhead of the indication bits.

[0026] In another possible embodiment, the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0027] In this possible implementation, two types of possible signaling conveying the first information are provided to be the basis for this embodiment of the solution.

[0028] In another possible implementation, the method further includes: the first communication device sending trigger signaling to the second communication device, the trigger signaling being used to trigger the second communication device to enable the sensing function.

[0029] In this possible implementation, a trigger condition for triggering the second communication device to enable the sensing function is provided to be the basis of this embodiment of the solution.

[0030] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0031] In this implementation, RRC signaling or DCI signaling may be used to trigger the second communication device to enable the sensing function.

[0032] In another possible implementation, the first communication device obtaining the sensing requirement parameters includes: the first communication device receiving the sensing requirement parameters from a third communication device.

[0033] In this implementation, sensing Requirements The parameters may be distributed to the first communication device by a third communication device, which may be understood as a control node, that controls the first communication device to transmit the sensing signal.

[0034] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0035] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0036] In this possible implementation, two possible communication resources are provided that are included in a frequency domain resource pool, and the two possible communication resources may be used to select a first frequency domain resource, whereby the communication device performs sensing of the surrounding environment while communicating.

[0037] According to a second aspect of an embodiment of the present application, there is provided a communication method, the method including:

[0038] The second communication device determines a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter. Then, the second communication device receives a sensing signal from the first communication device on the first frequency domain resource. The second communication device performs sensing measurement on the sensing signal to obtain a sensing result.

[0039] In this embodiment, a first frequency domain resource is selected from a frequency domain resource pool based on a sensing requirement parameter. The second communication device receives a sensing signal from the first communication device on the first frequency domain resource. In this way, the second communication device can sense the surrounding environment by receiving the sensing signal from the first communication device while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this way, the sensing requirement can be met and sensing performance can be improved.

[0040] In a possible implementation, the sensing requirement parameters include at least one of a clear ranging distance or ranging resolution.

[0041] In this implementation, the sensing requirement parameter is provided with content specifically included therein, which indicates a requirement for performing sensing ranging using the sensing signal. In other words, the sensing requirement parameter indicates a requirement for the first communication device or the second communication device to perform sensing ranging using the sensing signal.

[0042] In another possible implementation, the method further includes: the second communication device receiving first information from the first communication device, the first information indicating a frequency domain location of the first frequency domain resource.

[0043] In this possible implementation, the second communication device receives the frequency domain location of the first frequency domain resource indicated by the first communication device. In this way, the second communication device can transmit the sensing signal to the frequency domain location of the first frequency domain resource. position to perform sensing measurements of the surrounding environment.

[0044] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0045] In this possible implementation, two specific implementations are provided in which the first information indicates the frequency domain location of the first frequency domain resource. Specifically, the first information may directly indicate the frequency domain location of the first frequency domain resource, and the indication method is simple. Alternatively, the first information may indirectly indicate the frequency domain location of the first frequency domain resource using an index method, and this indication method may require a small number of indication bits, thereby reducing the overhead of the indication bits.

[0046] In another possible embodiment, the first information is carried in RRC signaling or DCI signaling.

[0047] In this possible implementation, two types of possible signaling conveying the first information are provided to be the basis for this embodiment of the solution.

[0048] In another possible implementation, the method further includes: the second communication device obtaining the sensing requirement parameter. The second communication device determining the first frequency domain resource includes: the second communication device determining the first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0049] In this possible implementation, a specific implementation is provided in which the second communication device determines the first frequency domain resource. The second communication device may obtain a sensing requirement parameter and determine the first frequency domain resource by referring to the sensing requirement parameter. In this way, the sensing requirement can be satisfied and the sensing performance can be improved.

[0050] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0051] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0052] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0053] In this possible implementation, multiple possible implementations of the content that is particularly included in the sensing requirement parameters and the requirements that the first frequency domain resource must meet in these implementations are provided.

[0054] In another possible implementation, the method further includes: the second communication device receiving trigger signaling from the first communication device, the trigger signaling being used to trigger the second communication device to enable the sensing function.

[0055] In this possible implementation, a trigger condition for triggering the second communication device to enable the sensing function is provided to be the basis of this embodiment of the solution.

[0056] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling, which may be used to trigger the second communication device to enable the sensing function.

[0057] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0058] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0059] In this possible implementation, two possible communication resources are provided that are included in a frequency domain resource pool, and the two possible communication resources may be used to select a first frequency domain resource, whereby the communication device performs sensing of the surrounding environment while communicating.

[0060] According to a third aspect of an embodiment of the present application, there is provided a first communication device, comprising: a processing module configured to determine a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter; and a transceiver module configured to transmit the sensing signal on a first frequency domain resource.

[0061] In a possible implementation, the sensing requirement parameters include at least one of a clear ranging distance or ranging resolution.

[0062] In another possible implementation, the transceiver module includes: further configured to obtain a sensing requirement parameter; The processing module is It is particularly configured to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0063] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0064] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0065] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0066] In another possible implementation, the first frequency domain resource includes a frequency point combination that satisfies a first condition, where a frequency baseline formed by frequency points included in the frequency point combination includes a frequency baseline of a first length, where the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], where K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and where K is greater than or equal to 1.

[0067] In another possible implementation, the frequency point combination includes a subcarrier combination, which is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

[0068] In another possible implementation, the transceiver module includes: Further configured to send first information to the second communication device, the first information indicating a frequency domain location of the first frequency domain resource.

[0069] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0070] In another possible implementation, the first information is carried in RRC signaling or DCI signaling.

[0071] In another possible implementation, the transceiver module includes: It is further configured to send trigger signaling to the second communication device, where the trigger signaling is used to trigger the second communication device to enable the sensing function.

[0072] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0073] In another possible implementation, the transceiver module includes: It is particularly configured to receive the sensing requirement parameters from the third communication device.

[0074] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0075] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0076] According to a fourth aspect of an embodiment of the present application, there is provided a second communication device, comprising: a processing module configured to determine a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter; a transceiver module configured to receive a sensing signal from a first communication device on a first frequency domain resource; The processing module is further configured to perform a sensing measurement of the sensing signal to obtain a sensing result.

[0077] In another possible implementation, the sensing requirement parameters include at least one of a definite ranging distance or ranging resolution.

[0078] In another possible implementation, the transceiver module includes: The communication device is further configured to receive first information from the first communication device, the first information indicating a frequency domain location of the first frequency domain resource.

[0079] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0080] In another possible implementation, the first information is carried in RRC signaling or DCI signaling.

[0081] In another possible implementation, the transceiver module includes: further configured to obtain a sensing requirement parameter; The processing module is It is particularly configured to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0082] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0083] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0084] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0085] In another possible implementation, the transceiver module includes: It is further configured to receive trigger signaling from the first communication device, the trigger signaling being used to trigger the second communication device to enable the sensing function.

[0086] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0087] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0088] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0089] According to a fifth aspect of an embodiment of the present application, there is provided a first communication device, the first communication device including a processor and a memory, the memory storing a computer program or computer instructions, the processor being further configured to call and execute the computer program or computer instructions stored in the memory, thereby performing any implementation of the first aspect.

[0090] Optionally, the first communication device further includes a transceiver, the processor being configured to control the transceiver to transmit and receive signals.

[0091] According to a sixth aspect of the present application, there is provided a second communication device, the second communication device including a processor and a memory, the memory storing a computer program or computer instructions, the processor being further configured to call and execute the computer program or computer instructions stored in the memory, thereby performing any implementation of the second aspect.

[0092] Optionally, the second communication device further includes a transceiver, the processor being configured to control the transceiver to transmit and receive signals.

[0093] According to a seventh aspect of an embodiment of the present application, there is provided a computer program product comprising computer instructions, which, when run on a computer, performs any implementation of the first or second aspect.

[0094] According to an eighth aspect of an embodiment of the present application, there is provided a computer-readable storage medium, the computer-readable storage medium including computer instructions, which, when executed on a computer, perform any of the first and second aspects.

[0095] According to a ninth aspect of an embodiment of the present application, there is provided a chip device, the chip device including a processor configured to connect to a memory and to invoke a program stored in the memory, whereby the processor performs any implementation of the first or second aspect.

[0096] According to a tenth aspect of the embodiment of the present application, there is provided a communication system, the communication system including a first communication device according to the first aspect and a second communication device according to the second aspect.

[0097] From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0098] From the above technical solution, it can be understood that the first communication device determines a first frequency domain resource, and the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter. Then, the first communication device sends a sensing signal on the first frequency domain resource. In the technical solution of the present application, it can be understood that the first frequency domain resource is selected from the frequency domain resource pool based on the sensing requirement parameter. The first communication device may send the sensing signal on the first frequency domain resource. In this way, the first communication device may sense the surrounding environment by sending the sensing signal while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this way, the sensing requirement can be met and the sensing performance can be improved. [Brief explanation of the drawings]

[0099] [Figure 1A] 1 is a schematic diagram of an application scenario according to an embodiment of the present application; [Figure 1B] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 1C] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 1D] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 1E] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 1F] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 2A] 1 is a schematic interaction diagram of a communication method according to an embodiment of the present application; [Figure 2B] FIG. 2 is a schematic diagram of another application scenario according to an embodiment of the present application; [Figure 2C] FIG. 2 is another schematic interaction diagram of a communication method according to an embodiment of the present application; [Figure 2D] FIG. 2 is another schematic interaction diagram of a communication method according to an embodiment of the present application; [Figure 3] 1 is a schematic flowchart of a communication method according to an embodiment of the present application; [Figure 4] 4 is another schematic flowchart of a communication method according to an embodiment of the present application; [Figure 5] 4 is another schematic flowchart of a communication method according to an embodiment of the present application; [Figure 6A] FIG. 2 is a schematic diagram of frequency point combination according to an embodiment of the present application; [Figure 6B] 1 is a schematic diagram of a frequency baseline and a frequency baseline redundancy amount formed by frequency points included in a frequency point combination according to an embodiment of the present application; [Figure 7A] FIG. 10 is another schematic diagram of frequency point combination according to an embodiment of the present application. [Figure 7B] FIG. 10 is another schematic diagram of a frequency baseline and a frequency baseline redundancy amount formed by frequency points included in a frequency point combination according to an embodiment of the present application. [Figure 8] 1 is a schematic diagram of the structure of a first communication device according to an embodiment of the present application; [Figure 9] FIG. 2 is a schematic diagram of the structure of a second communication device according to an embodiment of the present application; [Figure 10] FIG. 2 is another schematic diagram of the structure of the first communication device according to an embodiment of the present application; [Figure 11] FIG. 10 is another schematic diagram of the structure of a second communication device according to an embodiment of the present application; [Figure 12] 1 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application; [Figure 13] 1 is a schematic diagram of a communication system according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0100] The embodiments of the present application provide a communication method and a communication device, so that the communication device performs sensing of the surrounding environment while performing communication.

[0101] The following clearly and completely describes the technical solutions of the embodiments of the present application with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0102] References to "an embodiment," "some embodiments," etc. described herein indicate that one or more embodiments of the present application include a particular feature, structure, or characteristic that is described with reference to that embodiment. Thus, statements such as "in an embodiment," "in some embodiments," "in some other embodiments," and "in other embodiments" appearing in different places herein do not necessarily refer to the same embodiment, unless specifically emphasized otherwise, but rather mean "one or more, but not all, embodiments." The terms "comprise," "contain," "have," and other variations thereof all mean "including, but not limited to," unless specifically emphasized otherwise.

[0103] As used herein, "at least one" means one or more, and "multiple" means two or more. "And / or" describes an associative relationship between related objects and indicates that three relationships may exist. For example, A and / or B means that only A is present, both A and B are present, and only B is present, where A and B may be singular or plural. "At least one of the following items (parts)" or similar expressions refers to any combination of these items, including any combination of singular items (parts) or multiple items (parts). For example, at least one of a, b, and c may refer to a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c may be singular or plural.

[0104] The following explains some technical terms in this application.

[0105] 1. The frequency baseline is the frequency of one frequency point minus the frequency of another frequency point. The frequency baseline has direction and magnitude. If the frequency is f i and f j For two frequency points where ij =f i -f j , and the frequency baseline b ij =f j -f i is.

[0106] Communication systems to which the technical solutions of the present application are applicable include, but are not limited to, Long Term Evolution (LTE) systems, fifth generation (5G) mobile communication systems, mobile communication systems after 5G networks (e.g., 6G mobile communication systems), device-to-device (D2D) communication systems, or vehicle-to-everything (V2X) communication systems.

[0107] In an embodiment of the present application, a communication system includes a first communication device, and when communicating, the first communication device transmits a sensing signal to sense the surrounding environment.

[0108] In a possible implementation, the first communication device is a communication device having both sensing and communication capabilities. The first communication device determines a first frequency domain resource and transmits a sensing signal on the first frequency domain resource. The first frequency domain resource is determined from a frequency domain resource pool based on sensing requirement parameters. The sensing signal is reflected by a sensing target in the surrounding environment to the first communication device, and the first communication device receives the sensing signal reflected by the sensing target. In this manner, the first communication device can perform sensing measurements of the sensing signal to obtain sensing results. For example, the first communication device determines the distance between the sensing target and the first communication device.

[0109] In another possible implementation, the communication system further includes a second communication device. The first communication device determines a first frequency domain resource and transmits a sensing signal on the first frequency domain resource. The first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameters. The sensing signal is reflected by a sensing target in the surrounding environment, and the second communication device receives the sensing signal reflected by the sensing target. The second communication device then performs sensing measurement of the sensing signal to obtain a sensing result. For example, the first communication device determines the distance between the sensing target and the first communication device.

[0110] In this implementation, optionally, the communication system further includes a third communication device, which may represent the first communication device for transmitting the sensing signal, and the second communication device for enabling the sensing function.

[0111] In the two possible implementations described above, the frequency domain resource pool may include frequency domain resources used for communication and frequency domain resources used for positioning, which is not particularly limited in this application. The first frequency domain resource is a frequency domain resource selected from the frequency domain resource pool.

[0112] In the embodiments of the present application, the first communication device and the second communication device may be a radar device, an in-vehicle device, a network device, a terminal device, etc. The third communication device is a network device.

[0113] A network device is a device deployed in a radio access network and providing wireless communication capabilities to terminal devices. The network device may be a base station, including a macro base station, a micro base station, a relay station, and various types of access points. For example, a base station in an embodiment of the present application may be a base station, a transmission reception point (TRP), a transmission point (TP), or a next generation NodeB (ngNB) in a new radio (NR) system, or an evolved NodeB (eNB or eNodeB) in a long term evolution (LTE) system.

[0114] A terminal device may be a device that provides voice or data connectivity to a user. A terminal device may also be called user equipment (UE), a mobile station, a subscriber unit, a station, terminal equipment (TE), etc. A terminal device may be a cellular telephone ( cellularThe terminal device may be a mobile phone, a personal digital assistant (PDA), a wireless modem, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer (pad), an in-vehicle device, a wearable device, a computing device, an unmanned aerial vehicle, etc. With the development of wireless communication technology, any device that can access a communication system, communicate with the network side of a communication system, or communicate with another object through a communication system may be the terminal device of the embodiments of the present application. For example, the terminal device may be a terminal device or a vehicle in intelligent transportation, a household device in a smart home, an electric meter reading device, a voltage monitoring device or an environment monitoring device in a smart grid, a video surveillance device or a cash register in an intelligent security network, etc.

[0115] The following describes some application scenarios to which the embodiments of the present application can be applied. Please note that the following application scenarios are only examples and do not limit the technical solutions of the present application. The present application can also be applied to other application scenarios.

[0116] 1A is a schematic diagram of an application scenario according to an embodiment of the present application, illustrating a specific example where a first communication device in a communication system serves as both a sending end of a sensing signal and a receiving end of a sensing signal.

[0117] In FIG. 1A , the first communication device is network device 1. Network device 1 may select a first frequency domain resource from frequency domain resources belonging to network device 1 and used for communication. When network device 1 performs communication, network device 1 sends out a sensing signal on the first frequency domain resource. The sensing signal is reflected to network device 1 by vehicles in the surrounding environment. In this manner, network device 1 may perform sensing measurement of the sensing signal to obtain a sensing result. For example, network device 1 may perform sensing measurement of the sensing signal to obtain the distance between network device 1 and the vehicle, the speed of the vehicle, etc.

[0118] Hereinafter, with reference to FIGS. 1B to 1F, some specific examples will be described in which the first communication device is the sending end of the sensing signal and the second communication device is the receiving end of the sensing signal.

[0119] 1B is a schematic diagram of another application scenario according to an embodiment of the present application. A first communication device is a network device 1, and a second communication device is a terminal device. The terminal device accesses the network device 1. The network device 1 may communicate with the terminal device. When the network device 1 communicates with the terminal device, the network device 1 sends a sensing signal on a first frequency domain resource. For example, the first frequency domain resource may be determined from a frequency domain resource used to transmit a downlink signal between the network device 1 and the terminal device. Then, the sensing signal is reflected by a vehicle in the surrounding environment to the terminal device. The terminal device may sense the sensing signal and obtain a sensing result. In this way, the terminal device performs sensing of the vehicle in the surrounding environment while communicating.

[0120] 1C is a schematic diagram of another application scenario according to an embodiment of the present application. A first communication device is a terminal device, and a second communication device is a network device 1. The terminal device accesses the network device 1, and the terminal device may communicate with the network device 1. When the terminal device 1 communicates with the network device 1, the terminal device sends out a sensing signal on a first frequency domain resource. For example, the first frequency domain resource may be determined from a frequency domain resource used to transmit an uplink signal between the terminal device and the network device 1. The sensing signal is reflected to the network device 1 by a vehicle in the surrounding environment. The network device 1 may sense the sensing signal and obtain a sensing result. In this way, the network device 1 performs sensing of vehicles in the surrounding environment while communicating.

[0121] 1D is a schematic diagram of another application scenario according to an embodiment of the present application. A first communication device is a network device 1, and a second communication device is a network device 2. The network device 1 may communicate with the network device 2. When the network device 1 communicates with the network device 2, the network device 1 sends out a sensing signal on a first frequency domain resource. The first frequency domain resource may be determined from the frequency domain resource used for communication between the network device 1 and the network device 2. The sensing signal is reflected to the network device 2 by a vehicle in the surrounding environment. The network device 2 may sense the sensing signal and obtain a sensing result. In this way, the network device 2 performs sensing of the vehicle in the surrounding environment while communicating.

[0122] 1E is a schematic diagram of another application scenario according to an embodiment of the present application. A first communication device is a terminal device 1, and a second communication device is a terminal device 2. The terminal device 1 may communicate with the terminal device 2. When the terminal device 1 communicates with the terminal device 2, the terminal device 1 may send a sensing signal on a first frequency domain resource. For example, the first frequency domain resource may be determined from a frequency domain resource used for communication between the terminal device 1 and the terminal device 2. The sensing signal is reflected to the terminal device 2 by a vehicle in the surrounding environment. The terminal device 2 senses the sensing signal and obtains a sensing result. The application scenario shown in FIG. 1E may be applied to a V2X system or a D2D system.

[0123] FIG. 1F is a schematic diagram of another application scenario according to an embodiment of the present application. In FIG. 1F, a first communication device is network device 1, a second communication device is network device 2, and a third communication device is network device 3. Network device 1 may communicate with network device 2. Network device 3 functions as a control node and is configured to notify network device 1 and network device 2. For example, network device 3 triggers network device 1 to send a detection signal and triggers network device 2 to enable a sensing function. Network device 1 may send the sensing signal in a first frequency domain resource. The first frequency domain resource may be determined from the frequency domain resource used for communication between network device 1 and network device 2. The sensing signal is reflected to network device 2 by a vehicle in the surrounding environment. Network device 2 may sense the sensing signal and obtain a sensing result. In this way, network device 2 performs sensing of the surrounding environment while communicating.

[0124] The following describes the technical solutions of the present application with reference to specific embodiments.

[0125] 2A is a schematic diagram of another embodiment of a communication method according to an embodiment of the present application. In FIG. 2A, the communication method includes the following steps:

[0126] 201: A first communication device determines a first frequency domain resource.

[0127] The first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter. In this embodiment, the frequency domain resource pool includes available frequency domain resources configured for the first communication device. For example, the frequency domain resource pool includes frequency domain resources used for communication and / or frequency domain resources used for positioning. The first frequency domain resource may be determined from the frequency domain resources used for communication and / or frequency domain resources used for positioning.

[0128] Optionally, the frequency domain resource pool includes frequency domain resources used to transmit channel state information (CSI) reference signals between the first communication device and the second communication device. Alternatively, the frequency domain resource pool includes frequency domain resources used to transmit communication data between the first communication device and the second communication device. In other words, the first frequency domain resources in the present application may be frequency domain resources determined from frequency domain resources used to transmit CSI of the first communication device and / or from frequency domain resources used to transmit communication data of the first communication device.

[0129] Optionally, the first frequency domain resource includes a frequency point combination or a frequency band combination.

[0130] A frequency point combination includes one or more frequency points, and a frequency band combination includes one or more frequency bands.

[0131] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6.

[0132] For example, the frequency band combination includes the frequency band between frequency f0 and frequency f6.

[0133] In this embodiment, the sensing requirement parameter is used by the first communication device or the second communication device to perform sensing measurements using the sensing signal. For example, the sensing requirement parameter can represent a requirement for performing sensing ranging using the sensing signal.

[0134] Optionally, the sensing requirement parameters include at least one of a definite ranging distance or a ranging resolution.

[0135] Specifically, a clear ranging distance and ranging resolution represent requirements for performing sensing ranging using the sensing signal.

[0136] In this embodiment, ranging resolution refers to the minimum distance for distinguishing between two identical target points in terms of distance.

[0137] The two identical target points may be two target points that have the same size, volume, material, etc.

[0138] The smaller the ranging resolution, the shorter the minimum distance the first communication device needs to distinguish between the same two target points, in other words, the smaller the ranging resolution, the higher the sensing accuracy required.

[0139] For example, as shown in FIG. 2B , the terminal device transmits a sensing signal on a first frequency domain resource. The sensing signal is reflected by target point 1 and target point 2 separately to network device 1. The sum of the distance from the terminal device to target point 1 and the distance from target point 1 to network device 1 is r1+r2. The sum of the distance from the terminal device to target point 2 and the distance from target point 2 to network device 1 is r3+r4. The ranging resolution is Δr. If |(r3+r4)-(r1+r2)| is greater than or equal to Δr, network device 1 can distinguish between target point 1 and target point 2. If |(r3+r4)-(r1+r2)| is less than Δr, network device 1 may not be able to distinguish between target point 1 and target point 2, and network device 1 considers there to be only one target point.

[0140] It should be noted that the ranging resolution is proportional to the bandwidth of the sensing signal: a larger bandwidth of the sensing signal indicates a higher ranging resolution.

[0141] In this embodiment, optionally, when the first communication device functions as a transmitting end and a receiving end of the sensing signal, the definite ranging distance exhibits the following requirement: the distance from any point within the sensing area to the first communication device multiplied by 2 is less than the definite ranging distance, and the distance from any point at the edge of the sensing area to the first communication device multiplied by 2 is equal to the definite ranging distance.

[0142] For example, as shown in FIG. 1A, the sensing area is a circular area shown in FIG. 1A, and the network device 1 is the center of the circle. The specific ranging distance is r max Twice the distance from any point on the circle to network device 1 is the distinct ranging distance r max The vehicle is located within a circular region, and the distance from network device 1 to the vehicle is R1. For a vehicle within the circular region of FIG. 1A, the distance from network device 1 to the vehicle, R1, is multiplied by 2 to obtain r maxFor the target point on the circle in FIG. 1A, the distance from the target point to the network device 1 is R2, and the value obtained by multiplying R2 by 2 is r max is equal to.

[0143] In this embodiment, optionally, when the first communication device functions as a transmitting end of the sensing signal and the second communication device functions as a receiving end of the sensing signal, the definite ranging distance exhibits the following requirement: the sum of the distance from any point within the sensing area to the first communication device and the distance from that point to the second communication device is less than the definite ranging distance, and the sum of the distance from any point at the edge of the sensing area to the first communication device and the distance from that point to the second communication device is equal to the definite ranging distance.

[0144] For example, as shown in FIG. 2B, the sensing area is an ellipse area shown in FIG. 2B, and the network device 1 and the terminal device are the two foci of the ellipse. The specific ranging distance is r max The sum of the distance from any point on the ellipse to the network device 1 and the distance from that point to the terminal device is the definite distance measurement r max The target point 1 and the target point 2 are located within the ellipse area, and the target point 3 is located on the ellipse. The terminal device sends out a sensing signal in a first frequency domain resource. The sensing signal is reflected by the target point 1 and the target point 2 separately to the network device 1. For the target point 1 located within the ellipse area, the sum of the distance from the terminal device to the target point 1 and the distance from the target point 1 to the network device 1 is r1+r2, and r1+r2 is equal to r max For target point 3 located on the ellipse, the sum of the distance from the terminal device to target point 3 and the distance from target point 3 to network device 1 is r5+r6, and r5+r6 is r max is equal to.

[0145] In the following, the first frequency domain resource will be described with reference to the specific content included in the sensing requirement parameters.

[0146] In a first possible embodiment, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0147] First, an example in which the first frequency domain resource includes a frequency point combination is used for explanation. The specific ranging distance is r max and so the length of the minimum frequency baseline is

[0148]

number

[0149] where C is the propagation speed of light under standard atmospheric conditions. The frequency baseline formed by the frequency points included in the frequency point combination has a length of |b min |A frequency point combination may be considered to satisfy the minimum frequency baseline if it contains a frequency baseline that is:

[0150] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. In this frequency point combination, the frequency points are arranged in ascending order of frequency. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6.

[0151] The exact distance is r max and so the length of the minimum frequency baseline is

[0152]

number

[0153] In this frequency point combination, the frequency baseline formed by two different frequency points has a length |f0-f2|, where |f0-f2| is the frequency baseline formed by frequency point 0 and frequency point 2. min | In this case, this frequency point combination may be understood to satisfy the minimum frequency baseline.

[0154] From the viewpoint of using the frequency point resource solely by a single device, the frequency baseline formed by the frequency points in the frequency point combination has a length of |b min If a frequency point combination includes a frequency baseline of |b or less, the frequency point combination can also meet the minimum frequency baseline requirement, but frequency point resources may be wasted. Therefore, for the frequency baseline formed by the frequency points in the frequency point combination, the length of the minimum frequency baseline must be |b min |, the requirement of the minimum frequency baseline can be met, and waste of frequency point resources can be avoided.

[0155] In view of sharing frequency point resources by multiple devices, frequency point reuse may be taken into consideration to select frequency points to be included in a frequency point combination, improving resource utilization and saving frequency point resources.

[0156] For example, if the frequency point combination determined by device 1 includes frequency point 0 and frequency point 1, the frequency of frequency point 0 is f0, the frequency of frequency point 1 is f1, and |f0-f1| is equal to the length of the minimum frequency baseline required by device 1 and |f0-f1| is less than the length of the minimum frequency baseline required by device 2, device 2 may select frequency point 0 and frequency point 1. In this way, frequency point resource utilization of frequency point 0 and frequency point 1 can be improved, and frequency point resources can be saved.

[0157] For example, a clear distance measurement r max= 100m. In this case, the formula

[0158]

number

[0159] It may be determined that the minimum frequency baseline length needs to be 3 megahertz (MHz). The frequency domain resource pool includes a 3.5 gigahertz (GHz) frequency band, and {f(a)|f(a)=3.5×10 9 +a×15×10 3 , 0≦a≦1000}, where the unit of f(a) is Hertz (Hz). In this case, the minimum frequency point is 3.5 GHz and the maximum frequency point is 3.515 GHz. Other frequency points are selected from f(a) at intervals of 15 kHz to obtain frequency point combination 1. Next, a frequency point is selected from frequency point combination 1 to obtain frequency point combination 2. Specifically, frequency point combination 2 is {f(m)|f(m)=3.5×10 9 +m×15×10 3 , m=0, 200, 400, 600, 800, 1000}, where the unit of f(m) is Hertz (Hz). Frequency point combination 2 is used as the first frequency domain resource. In the frequency baseline formed by two different frequency points in frequency point combination 2, the length of the frequency baseline formed by frequency point 3.5 GHz and frequency point 3.503 GHz is 3 MHz. Therefore, it may be understood that frequency point combination 2 satisfies the minimum frequency baseline.

[0160] In a second possible implementation, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0161] First, an example is used for explanation in which the first frequency domain resource includes a frequency point combination. The ranging resolution is Δr, so that the length of the maximum frequency baseline is

[0162]

number

[0163] where C is the propagation speed of light under standard atmospheric conditions. The frequency baseline formed by the frequency points included in the frequency point combination has a length of |b max | or more frequency baselines, the frequency point combination may be considered to satisfy the maximum frequency baseline.

[0164] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. In this frequency point combination, the frequency points are arranged in ascending order of frequency. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6.

[0165] The ranging resolution is Δr, and therefore the length of the maximum frequency baseline is

[0166]

number

[0167] In this frequency point combination, the length of the frequency baseline formed by two different frequency points is |f0-f6|, where |f0-f6| is the frequency baseline formed by frequency point 0 and frequency point 6. max | In this case, this frequency point combination may be understood to satisfy the maximum frequency baseline.

[0168] From the viewpoint of using the frequency point resource solely by a single device, the frequency baseline formed by the frequency points in the frequency point combination has a length of |b maxIf the frequency point combination includes more than |b frequency baselines, the frequency point combination can also meet the maximum frequency baseline requirement, but frequency point resources may be wasted. Therefore, the frequency baselines formed by the frequency points in the frequency point combination must be longer than |b max |, the requirement of the maximum frequency baseline can be met, and waste of frequency point resources can be avoided.

[0169] In view of sharing frequency point resources by multiple devices, frequency point reuse may be considered to select frequency points to be included in a frequency point combination, thereby improving resource utilization and saving frequency point resources. For example, if a frequency point combination determined by device 1 includes frequency point 0, frequency point 2, frequency point 4, and frequency point 7, the frequency points in the frequency point combination are arranged in ascending order of frequency, |f0-f7| is equal to the length of the maximum frequency baseline required by device 1, and |f0-f7| is greater than the length of the maximum frequency baseline required by device 2, device 1 may determine that the frequency point combination satisfies the maximum frequency baseline required by device 1, and device 2 may select frequency point 0, frequency point 2, frequency point 4, and frequency point 7. In this way, frequency point resource utilization of frequency point 0, frequency point 2, frequency point 4, and frequency point 7 may be improved, and frequency point resources may be saved.

[0170] For example, the ranging resolution is Δr = 10 meters (m). In this case, the formula

[0171]

number

[0172] It may be determined that the maximum frequency baseline length needs to be 30 MHz. The frequency domain resource pool includes the 3.5 GHz frequency band, and {f(i)|f(i)=3.5×10 9+i×15×10 3 , 0≦i≦2000}, where the unit of f(i) is Hz. In this case, the minimum frequency point is 3.5 GHz and the maximum frequency point is 3.53 GHz. Other frequency points are selected from f(i) at intervals of 15 kHz to obtain frequency point combination 3. Next, a frequency point is selected from frequency point combination 3 to obtain frequency point combination 4. Specifically, frequency point combination 4 is {f(n)|f(n)=3.5×10 9 +n×15×10 3 ,n=0,200,400,600,800,1000,1200,1400,1600,1800,2000}, where f(n) is in Hertz (Hz). In the frequency baseline formed by two different frequency points in frequency point combination 4, the length of the frequency baseline formed by frequency point 3.5 GHz and frequency point 3.53 GHz is 30 MHz. Therefore, frequency point combination 4 satisfies the maximum frequency baseline.

[0173] An example in which the first frequency domain resource includes a frequency band combination is used in the following description. The frequency band combination includes one or more frequency bands. The ranging resolution is Δr, so that the length of the maximum frequency baseline is

[0174]

number

[0175] where C is the speed of propagation of light under standard atmospheric conditions. Bandwidth The frequency baseline formed by the frequency bands included in the combination is max If the frequency baseline contains more than | Bandwidth The combination may be considered to meet the maximum frequency baseline.

[0176] For example, a frequency band combination includes a frequency band from f0 to f3 and a frequency band from f6 to f9. Small , f3 is better than f6 Small , f6 is faster than f9 small The minimum frequency is f0 and the maximum frequency is f9. In this case, the length of the longest frequency baseline formed by the frequency bands included in the frequency band combination is |f0-f9|. If |f0-f9| is |b max | or greater, then the frequency band combination may be considered to meet the maximum frequency baseline.

[0177] In a third possible implementation, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0178] The minimum frequency baseline is determined based on the unambiguous ranging distance, and the maximum frequency baseline is determined based on the ranging resolution.

[0179] An example in which the first frequency domain resource includes a frequency point combination is used for explanation in this specification. max and the ranging resolution is Δr. Therefore, the length of the minimum frequency baseline is

[0180]

number

[0181] and the length of the maximum frequency baseline is

[0182]

number

[0183] Frequency point The frequency baseline formed by the frequency points in the combination is min A frequency baseline less than or equal to | and length |bmax | or more frequency baselines, the frequency point combination may be considered to satisfy the maximum frequency baseline and the minimum frequency baseline.

[0184] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. In this frequency point combination, the frequency points are arranged in ascending order of frequency. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6.

[0185] In the frequency baseline formed by two different frequency points in the frequency point combination, the length of the frequency baseline formed by frequency point 0 and frequency point 2 is |f0-f2|, and the length of the frequency baseline formed by frequency point 0 and frequency point 6 is |f0-f6|. |f0-f2| is |b min It may be understood that the frequency point combination satisfies the minimum frequency baseline if |f0-f6| is less than or equal to |b max | or greater, the frequency point combination may be understood to satisfy the maximum frequency baseline. In other words, the frequency point combination satisfies both the minimum frequency baseline and the maximum frequency baseline.

[0186] For example, a clear distance measurement r max = 100m. In this case, the formula

[0187]

number

[0188] It can be determined that the minimum frequency baseline length needs to be 3 MHz. The ranging resolution is Δr=10 m. In this case, the formula

[0189]

number

[0190] It may be determined that the maximum frequency baseline length needs to be 30 MHz. The frequency domain resource pool includes a 3.5 gigahertz (GHz) frequency band, and {f(i)|f(i)=3.5×10 9 +i×15×10 3 , 0≦i≦2000}, where the unit of f(i) is Hz. In this case, the minimum frequency point is 3.5 GHz and the maximum frequency point is 3.53 GHz. Other frequency points are selected from f(i) at intervals of 15 kHz to obtain frequency point combination 5. Next, a frequency point is selected from frequency point combination 5 to obtain frequency point combination 6. Specifically, frequency point combination 6 is {f(n)|f(n)=3.5×10 9 +n×15×10 3 ,n=0,200,400,600,800,1000,1200,1400,1600,1800,2000}, where the unit of f(n) is Hz. Of the frequency baselines formed by two different frequency points in frequency point combination 6, the length of the frequency baseline formed by frequency point 3.5 GHz and frequency point 3.503 GHz is 3 MHz. Therefore, frequency point combination 6 satisfies the minimum frequency baseline. The length of the frequency baseline formed by frequency point 3.5 GHz and frequency point 3.53 GHz is 30 MHz. Therefore, frequency point combination 6 satisfies the maximum frequency baseline. In other words, frequency point combination 6 satisfies both the minimum frequency baseline and the maximum frequency baseline.

[0191] In a third possible implementation, optionally, the first frequency domain resource includes a frequency point combination, which is a frequency point combination that satisfies a first condition.

[0192] The first condition includes: the frequency baseline formed by the frequency points included in the frequency point combination includes a frequency baseline of a first length, where the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], and K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline and is greater than 1.

[0193] For example, the frequencies of the frequency points included in the frequency point combinations are f 0 、f 1 、f 4 , and f The length of the maximum frequency baseline to the length of the minimum frequency baseline is 6. The frequency baseline formed by the frequency points included in the frequency point combination may be understood to have a minimum length of 1 and a maximum length of 6. The ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline is 6. The frequency baselines that may be formed by the frequency point combination include frequency baselines whose frequencies are separately −6, −5, −4, −3, −2, −1, 0, 1, 2, 3, 4, 5, and 6. The frequency point combination may be understood to satisfy the requirement of frequency baseline coverage completeness.

[0194] From the above explanation, the length of the maximum frequency baseline is |b max | and the length of the minimum frequency baseline is |b min It can be understood that K=|b max | / |b min It can be understood that the length is k|b min If all frequency baselines where | can be formed by the frequency points included in the frequency point combination, the frequency baseline formed by the frequency points included in the frequency point combination has complete frequency coverage, in other words, frequency baseline coverage completeness is ensured. In this way, sensing and ranging can be performed on multiple target points in the surrounding environment.

[0195] For example, if a frequency point combination can form only one frequency baseline d1, the following relationship y1=f(d1,τ1) is obtained. d1 represents the frequency baseline, τ1 is a delay, y1 is a measurement result corresponding to the frequency baseline d1, and f is a mapping relationship for determining y1 based on the frequency baseline d1 and the delay τ1. The delay τ1 is unknown. In other words, one equation corresponds to one unknown. The delay τ1 may be understood as the delay between the sensing signal of the two frequency points forming the frequency baseline d1 reaching the target point 1 and then being reflected.

[0196] However, if both delays τ1 and τ2 exist, the following relationship y1=f1(d1,τ1,τ2) is obtained. The delays τ1 and τ2 are unknown. In this case, one equation corresponds to two unknowns, and the equation cannot be solved. The delay τ2 is the frequency baseline d τ1 and τ2 can be understood as the delay of the sensing signal of the two frequency points forming τ1 reaching the target point 2 and then being reflected. However, if the frequency point combination further forms another frequency baseline d2, another equation y2=f2(d2,τ1,τ2) can be obtained. In this way, the frequency baseline d1 and the frequency baseline d2 correspond to two equations separately, and two unknowns, namely, the delay τ1 and the delay τ2, can be solved. Then, the position information of the target point 1 and the target point 2 can be determined in relation to the delay τ1 and the delay τ2. Therefore, if the frequency baseline formed by the frequency points included in the frequency point combination has complete frequency coverage, sensing and ranging can be performed for multiple target points in the surrounding environment.

[0197] In a third possible implementation, optionally, the first frequency domain resource includes a frequency band combination, which is a frequency band combination that satisfies a second condition.

[0198] The second condition includes the following: the frequency baseline formed by the frequency bands included in the frequency band combination includes a frequency baseline of a second length, and the second length is k times the minimum frequency baseline. Length where k is a positive integer in [1,K], K is the length of the maximum frequency baseline, and K is greater than 1.

[0199] For example, a frequency band combination may include a frequency band from frequency f0 to frequency f3 and a frequency band from frequency f6 to frequency f9. If the frequency baseline formed by the selected frequency points in the frequency band combination includes a frequency baseline of the second length, the frequency baseline formed by the selected frequency points in the frequency band combination is considered to have complete frequency coverage.

[0200] In this embodiment, optionally, the first frequency domain resource includes a frequency point combination, which includes a subcarrier combination, which is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

[0201] Specifically, there may be multiple subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition. In this case, the subcarrier combination may be the subcarrier combination with the minimum number of subcarriers among the multiple subcarrier combinations. In this way, the subcarrier combination with the minimum number of subcarriers is selected under the condition that the maximum frequency baseline and the minimum frequency baseline are satisfied and complete frequency baseline coverage is ensured, thereby effectively reducing subcarrier overhead in the frequency domain. This avoids occupying excessive communication resources and affecting communication performance.

[0202] For a specific implementation of determining the first frequency domain resource by the first communication device in step 201, please refer to the description related to Figures 2C and 2D in the following description, and details will not be described in this specification.

[0203] 202: The first communication device sends out a sensing signal on a first frequency domain resource.

[0204] For example, the first frequency domain resource includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6. In this case, the first communication device separately transmits sensing signals at the frequency points whose frequencies are f0, f2, f4, and f6, respectively.

[0205] For example, the first frequency domain resource includes a frequency band between frequencies f0 and f6, and the first communication device is a radar device that transmits a frequency modulated continuous wave (FMCW) signal in the frequency band between frequencies f0 and f6.

[0206] In this embodiment of the present application, in the embodiment shown in FIG. 2A, before the second communication device performs sensing measurements of the sensing signal, the second communication device enables the sensing function.

[0207] Optionally, the second communication device may periodically enable the sensing function, or may always enable the sensing function, or the first communication device or the third communication device may trigger the second communication device to enable the sensing function. Optionally, the embodiment shown in FIG. 2A further includes step 202a. Step 202a may be performed before step 202.

[0208] 202a: The first communication device sends a trigger command to the second communication device.

[0209] The trigger command is used to trigger the second communication device to enable the sensing function.

[0210] Specifically, before sending out the sensing signal, the first communication device may trigger the second communication device to enable the sensing function by using a trigger command, so that the second communication device receives the sensing signal and performs sensing measurements of the sensing signal.

[0211] Optionally, the trigger command is an RRC command or a DCI command.

[0212] The manner in which the third communication device triggers the second communication device to enable the sensing function is similar to step 202a described above, and the details will not be described again here.

[0213] In this embodiment, if the first communication device functions as a transmitting end and a receiving end of the sensing signal, optionally, the embodiment shown in FIG. 2A further includes step 203 and step 204. Step 203 and step 204 may be performed after step 202.

[0214] 203: The first communication device receives a reflected sensing signal in a first frequency domain resource.

[0215] 1A, network device 1 transmits sensing signals at frequency points having frequencies f0, f2, f4, and f6, respectively. The sensing signals are reflected by vehicles (i.e., sensing targets) in the surrounding environment to network device 1. Network device 1 receives the sensing signals reflected by the sensing targets at frequency points having frequencies f0, f2, f4, and f6, respectively.

[0216] For example, the first communication device is a radar device. The radar device transmits a frequency-modulated continuous wave signal in a frequency band between frequencies f0 and f6. The sensing signal is reflected back to the radar device by a sensing target in the surrounding environment. The radar device receives the frequency-modulated continuous wave signal in the frequency band between frequencies f0 and f6.

[0217] 204: The first communication device performs sensing measurement of the sensing signal to obtain a sensing result.

[0218] In this embodiment, optionally, the sensing results include the distance between the first communication device and the sensing target, the amount of movement of the sensing target, the position of the sensing target, and the like.

[0219] For example, as shown in FIG. 1A, the network device 1 transmits sensing signals on two subcarriers whose frequency points are 3.5 GHz and 3.501 GHz, respectively, and the initial phases of the sensing signals on the two subcarriers are: Network Devices 1, both are 0. A vehicle is the sensing target. The phase changes caused by the sensing signals of two subcarriers at frequency points 3.5 GHz and 3.501 GHz are 700π and 700.2π, respectively. In addition, the difference in phase changes of the two subcarriers is Δφ 21 =0.2π. In this case, network device 1

[0220]

number

[0221] where f1=3.501 GHz and f2=3.5 GHz. Therefore, the distance between network device 1 and the vehicle is R1=cτ / 2=15 m, where C is the propagation speed of light under standard atmospheric conditions.

[0222] The speed at which the vehicle moves relative to the network device 1 can be determined based on the change over time in the distance r between the network device 1 and the vehicle. The position of the vehicle can be obtained by multiple network devices jointly performing sensing ranging on the vehicle. For example, each network device in the multiple network devices can obtain the distance between the network device and the vehicle. In this case, the ranging results of the four network devices can be combined to obtain the coordinates of the vehicle in three-dimensional space, i.e., the position of the vehicle.

[0223] In this embodiment, when the first communication device functions as a transmitting end of the sensing signal and the second communication device functions as a receiving end of the sensing signal, optionally, the embodiment shown in FIG. 2A further includes steps 205 to 207. Steps 205 to 207 may be performed after step 202.

[0224] 205: The second communication device determines a first frequency domain resource.

[0225] In step 205, the second communication device may autonomously determine the first frequency domain resource based on the sensing requirement parameter. Alternatively, the second communication device receives first information from the first communication device and determines the first frequency domain resource based on the first information. Step 205 is similar to the above-mentioned step 201. For details, please refer to the related description of the above-mentioned step 201. The details will not be described again in this specification.

[0226] 206: The second communication device receives a sensing signal on the first frequency domain resource.

[0227] For example, the first frequency domain resource includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6. In this case, the second communication device separately receives sensing signals at frequency points whose frequencies are f0, f2, f4, and f6, respectively.

[0228] 207: The second communication device performs sensing measurement of the sensing signal to obtain a sensing result.

[0229] For example, as shown in FIG. 1B, network device 1 transmits signals on three subcarriers with frequencies of 3.5 GHz, 3.501 GHz, and 3.503 GHz, respectively, and the initial phases of the sensing signals on the three subcarriers are all 0 in network device 1. A vehicle is the sensing target. The distance between network device 1 and the vehicle and the distance between the vehicle and the network device 1 are calculated. Terminal The sum of the distance between the sensor and device 1 is R1 + R2. In this case, the sensing signal is R 1 is propagated to the vehicle through R 2 to the terminal device.

[0230] The subcarrier with a frequency of 3.5 GHz is called subcarrier 1 and has f1 = 3.5 GHz. The subcarrier with a frequency of 3.501 GHz is called subcarrier 2 and has f2 = 3.501 GHz. The subcarrier with a frequency of 3.503 GHz is called subcarrier 3 and has f3 = 3.503 GHz.

[0231] The phase changes caused by the sensing signals of subcarrier 1, subcarrier 2, and subcarrier 3 are 700.01π, 700.19π, and 700.61π, respectively. In addition, the difference in phase change between subcarrier 1 and subcarrier 2 is Δφ 21 =0.18π. In this case, network device 1

[0232]

number

[0233] Therefore, it is calculated that the distance from the network device 1 to the vehicle and further to the terminal device is R1+R2=cτ1=27 m.

[0234] The difference in phase change between the sensing signals of subcarrier 2 and subcarrier 3 is Δφ 32 =0.42π. In this case, network device 1

[0235]

number

[0236] Therefore, the distance from the network device 1 to the vehicle and further to the terminal device is obtained by calculation as R1+R2=cτ2=31.5 m.

[0237] The difference in phase change between the sensing signals of subcarrier 1 and subcarrier 3 is Δφ 31 =0.6π. In this case, network device 1

[0238]

number

[0239] Therefore, the distance from the network device 1 to the vehicle and further to the terminal device is calculated to be R1+R2=cτ3=30 m, where C is the propagation speed of light under standard atmospheric conditions.

[0240] From the above calculation results, it can be seen that the results obtained by calculation based on different subcarriers will be different. This is mainly due to the existence of noise in the actual measurement process, resulting in measurement deviation. Therefore, to reduce the influence of measurement noise, the network device 1 may average the measurement results of different subcarriers to obtain the final result. In this case, the sum of the distance between the network device 1 and the vehicle and the distance between the vehicle and the terminal device is (27m + 31.5m + 30m) / 3 = 29.5m.

[0241] It should be noted that the network device 1 or the terminal device may determine the distance from the network device 1 to the vehicle and further to the terminal device for a specific application scenario. For example, in a vehicle positioning scenario with high safety requirements, the terminal device is the vehicle 2. In this case, the network device 1 or the vehicle 2 may use the distance of 27 m from the network device 1 to the vehicle and further to the vehicle 2 as the final measurement result. This can avoid safe driving problems between the vehicle 1 and the vehicle 2 caused by measurement deviations.

[0242] The distance between the network device 1 and the vehicle, the distance between the vehicle and the terminal device, and the position of the vehicle can be obtained by collaborative ranging by multiple network devices and the terminal device. For example, the terminal device can separately obtain the distance between the terminal device and the vehicle and the distance between the vehicle and multiple network devices. In this case, the ranging results of the terminal device with respect to four network devices can be combined to obtain the coordinates of the vehicle in three-dimensional space, i.e., the position of the vehicle. The speed of the vehicle can be obtained based on the change in the position of the vehicle over time.

[0243] In this embodiment of the present application, the first communication device determines a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter. Then, the first communication device sends a sensing signal on the first frequency domain resource. In the technical solution of the present application, it can be understood that the first frequency domain resource is selected from the frequency domain resource pool based on the sensing requirement parameter. The first communication device may send the sensing signal on the first frequency domain resource. In this way, the first communication device may sense the surrounding environment by sending the sensing signal while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this way, the sensing requirement can be met and the sensing performance can be improved.

[0244] In the embodiment of the present application, the first communication device determines the first frequency domain resource in several ways. The following shows two possible implementations. Specific descriptions are provided separately with reference to Figures 2C and 2D.

[0245] In the following, a first implementation will be described with reference to the embodiment shown in FIG. 2C.

[0246] Referring to FIG. 2C, step 201 specifically includes step 201a and step 201b.

[0247] Step 201a: The first communication device obtains sensing requirement parameters.

[0248] Specifically, the first communication device may obtain the sensing requirement parameters in several ways. The following provides two possible implementations:

[0249] Implementation 1: The first communication device determines a sensing requirement parameter based on the sensing requirement.

[0250] In a possible implementation, the sensing requirements include requirements for performing sensing ranging using the sensing signals.

[0251] For example, as shown in FIG. 1B, the network device 1 autonomously determines a clear ranging distance, ranging resolution, etc. based on sensing requirements.

[0252] Implementation 2: The first communication device receives the sensing requirement parameters from the second communication device or the third communication device.

[0253] 1B, the first communication device is network device 1, and the second communication device is a terminal device. The terminal device may send a sensing request and corresponding sensing requirement parameters to network device 1, so that the terminal device senses the surrounding environment using a sensing signal. In response, network device 1 receives the sensing request and the sensing requirement parameters from the terminal device. The sensing request is used to request network device 1 to send a sensing signal.

[0254] For example, as shown in FIG. 1F , the first communication device is network device 1, the second communication device is network device 2, and the third communication device is network device 3. Network device 3 may send sensing requirement parameters to network device 1 and send trigger commands to network device 2. The trigger commands are used to trigger network device 2 to enable sensing functions.

[0255] Step 201b: The first communication device determines a first frequency domain resource based on the sensing requirement parameter.

[0256] For details of step 201b, please refer to the detailed description below of the embodiment shown in Figures 3 to 5. Details will not be described here.

[0257] Based on the implementation of step 201a and step 201b, optionally, the embodiment shown in Figure 2C further includes step 201c, which is performed after step 201b.

[0258] Referring to Figure 2C, step 201c is specifically as follows: the first communication device sends first information to the second communication device, and in response, the second communication device receives the first information from the first communication device.

[0259] The first information indicates a frequency domain location of the first frequency domain resource.

[0260] Specifically, the first communication device indicates the frequency domain location of the first frequency domain resource to the second communication device using the first information.

[0261] In this embodiment, there are multiple indication methods for the first information. The following provides two possible indication methods:

[0262] Indication method 1: The first information includes a frequency domain location of the first frequency domain resource.

[0263] In this indication method, the first information specifically includes specific location information of the first frequency domain resource. For example, the first frequency domain resource includes frequency point 1, frequency point 2, and frequency point 3. The first information includes frequencies corresponding to frequency point 1, frequency point 2, and frequency point 3, respectively.

[0264] Indication method 2: The first information includes a sensing quality index (SQI).

[0265] The sensing quality index indicates a frequency domain location of the first frequency domain resource.

[0266] In this indication method, a table is pre-configured in the first communication device and the second communication device. The table indicates a mapping relationship between a sensing quality index and a frequency domain resource. In the table, the sensing quality index has a corresponding frequency domain resource.

[0267] For example, as shown in Table 1, the following uses a scheme in which the first frequency domain resource includes a frequency point combination as an example for explanation.

[0268] [Table 1]

[0269] f x refers to the frequency of frequency point x, where x is a positive integer in [0,M] and M is a positive integer. The value of M is the total number of frequency points included in the frequency domain resource pool.

[0270] In this embodiment, optionally, the first information is carried in RRC signaling or DCI signaling.

[0271] In this embodiment, optionally, after the second communication device receives the first information from the first communication device, the second communication device feeds back a first response message to the first communication device to notify the first communication device that the second communication device has successfully received the first information. Optionally, the embodiment shown in Figure 2C further includes step 201d. For details, see Figure 2C. Step 201d may be performed after step 201c.

[0272] Step 201d: The second communication device sends a first response message to the first communication device, and in response, the first communication device receives a first response message from the second communication device.

[0273] The first response message is used to notify the first communication device that the second communication device has successfully received the first information.

[0274] A second implementation is described below with reference to FIG. 2D.

[0275] 2D is a schematic diagram of another embodiment of a communication method according to an embodiment of the present application. When the first communication device functions as a transmitting end of a sensing signal, the second communication device functions as a receiving end of the sensing signal. Referring to FIG. 2D, optionally, step 201 specifically includes step 201d and step 201e.

[0276] Step 201d: The second communication device sends the second information to the first communication device, and in response, the first communication device receives the second information from the second communication device.

[0277] The second information indicates a frequency domain location of the first frequency domain resource.

[0278] In this implementation, the second communication device determines the first frequency domain resource and then notifies the first communication device of the frequency domain location of the first frequency domain resource using the second information. The manner in which the second communication device determines the first frequency domain resource is similar to the process in which the first communication device determines the first frequency domain resource in step 201b. For details, please refer to the related description of determining the first frequency domain resource by the first communication device in step 201b of FIG. 2C. The details will not be described again herein.

[0279] The indication method of the second information is the same as the indication method of the first information. For details, please refer to the related description of the indication method of the first information. The details will not be described again in this specification.

[0280] In this embodiment, optionally, the second information is carried in RRC signaling or DCI signaling.

[0281] Step 201e: The first communication device determines a first frequency domain resource based on the second information.

[0282] Optionally, after the first communication device receives the second information, the embodiment shown in Figure 2D further includes step 201f, which is performed after step 201e.

[0283] 201f: The first communication device sends a second response message to the second communication device, and in response, the second communication device receives a second response message from the first communication device.

[0284] The second response message is used to notify the second communication device that the first communication device has successfully received the second information.

[0285] In this embodiment of the present application, there are several ways for the first communication device to determine the first frequency domain resource based on the sensing requirement parameter in step 201b. The following provides two possible implementations:

[0286] Implementation 1: The first communication device determines a first frequency domain resource based on the sensing requirement parameter and a first mapping relationship.

[0287] The first mapping relationship includes a mapping relationship between a sensing requirement parameter and a frequency domain resource.

[0288] Optionally, the first mapping relationship may be expressed using a table. For example, Table 2 uses an example in which the first frequency domain resource includes a frequency point combination and the sensing requirement parameters include a clear ranging distance and ranging resolution for illustration.

[0289] [Table 2]

[0290] For example, in the sensing requirement parameters, if the clear ranging distance is 90 and the ranging resolution is 10, the first communication device determines the frequency point combination based on the above Table 2 as follows: {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0, 200, 800, 1400, 1800}.

[0291] It should be noted that if the specific ranging distance and ranging resolution in the sensing requirement parameters do not match any of the groups of specific ranging distances and ranging resolutions in Table 2, the first communication device may select as the first frequency domain resource a frequency point combination corresponding to a group of specific ranging distances and ranging resolutions that approximates the specific ranging distance and ranging resolution in the sensing requirement parameters.

[0292] For example, the sensing requirement parameters include a clear ranging distance of 89 and a ranging resolution of 11. In this case, the first communication device may select a frequency point combination corresponding to a clear ranging distance of 90 and a ranging resolution of 10 in Table 2 as the first frequency domain resource.

[0293] From Table 2, it can be understood that when the same ranging resolution is required, the larger the specific ranging distance, the larger the number of frequency points included in the frequency point combination to meet the specific ranging distance requirement.

[0294] For example, as shown in Table 2, the clear ranging distance of 90 and ranging resolution of 10 are obtained by the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0,200,800,1400,1800}. The clear ranging distance 130 and ranging resolution 10 correspond to the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0,200,400,1200,2000,2600}. The frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3,j=0,200,400,1200,2000,2600}, the number of frequency points included in the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0, 200, 800, 1400, 1800}.

[0295] From Table 2, it can be understood that for sensing requirement parameters, when the same clear ranging distance is required, the smaller the ranging resolution, the greater the number of frequency points included in the frequency point combination to meet the ranging resolution requirement.

[0296] For example, as shown in Table 2, the clear ranging distance of 90 and ranging resolution of 10 are obtained by the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 ,j=0,200,800,1400,1800}.

[0297] The clear ranging distance of 90 and ranging resolution of 5 are obtained by the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0,100,200,600,1000,1400,1700,1800}. The frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 The number of frequency points included in the frequency point combination {f(j)|f(j)=3.5×10 9 +j×15×10 3 , j=0, 200, 800, 1400, 1800}.

[0298] It should be noted that Table 2 may be preset in the first communication device or may be sent to the first communication device by another communication device. Alternatively, the first communication device determines a frequency point combination corresponding to each group of sensing requirement parameters in the manner of Implementation 2 based on multiple groups of sensing requirement parameters, and then generates and stores Table 2.

[0299] In Implementation 1, the first communication device determines the first frequency domain resource by a table lookup method, thereby reducing the time required by the first communication device to determine the first frequency domain resource and effectively saving computational resources.

[0300] Implementation 2: The first communication device determines a first frequency domain resource from a frequency domain resource pool based on the content included in the sensing requirement parameter.

[0301] 1. With reference to Figure 3, the following describes a method for a first communication device to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameters when the sensing requirement parameters include a clear ranging distance. Referring to Figure 3, step 201b specifically includes steps 3001 and 3002.

[0302] 3001: A first communication device determines a minimum frequency baseline based on a clear ranging distance.

[0303] Specifically, the clear distance is r max whereby the first communication device determines that the length of the minimum frequency baseline is

[0304]

number

[0305] It can be determined that:

[0306] The specific principle of step 3001 will be described below. It is assumed that the first communication device performs sensing and ranging using two subcarriers. The frequencies of the two subcarriers are f1 and f2, respectively. The first communication device separately transmits sensing signals on the two subcarriers, and the sensing signals are reflected by the target point to the second communication device. The second communication device receives the reflected sensing signals. The delay of the sensing signals passing through the entire path is τ. It is assumed that the initial phases of the sensing signals on the two subcarriers are both 0 in the first communication device. In this case, after the delay τ, the phase changes of the two subcarriers are 2πf1τ and 2πf2τ, respectively.

[0307] The difference in phase change between the two subcarriers is Δφ 21 =2π(f2-f1)τ.

[0308] The second communication device measures the phase changes in the two subcarriers and calculates a difference Δφ between the phase changes in the two subcarriers. 21 In this case, τ=Δφ 21 / (2π(f2-f1)), and the sum of the distance between the first communication device and the target point and the distance between the target point and the second communication device is r=cτ=c×Δφ 21 / (2π(f2-f1)), where C is the propagation speed of light under standard atmospheric conditions.

[0309] Formula τ = Δφ 21 From / (2π(f2-f1)), it can be seen that a smaller frequency baseline indicates a smaller value of |f2-f1|. Therefore, as τ changes, Δφ 21 =2π(f2-f1)τ is less likely to exceed 2π (Δφ 21 (When f2-f1 exceeds 2π, phase ambiguity occurs, leading to ranging ambiguity.) Therefore, 2π(f2-f1)τ≦2π, and

[0310]

number

[0311] In this case, a smaller value of |f2-f1| indicates a larger value of τ and a larger distinct distance. Therefore, in step 3001, the first communication device may determine the minimum frequency baseline of the frequency point combination with reference to the distinct ranging distance.

[0312] It should be noted that the initial phases of the sensing signals of the two subcarriers in the first communication device may not be 0. The above is only an example and does not limit the technical solutions of the present application.

[0313] Δφ 21 When Δφ exceeds 2π, phase ambiguity occurs, resulting in ranging ambiguity. 21 It is assumed that the actual value of is 2kπ+π / 3 and the actual value obtained by measurement is π / 3. Based on the actual value obtained by measurement, the delay is determined to be 1 / (6(f2-f1)), but the actual delay is (k+1 / 6) / (f2-f1). Therefore, the difference Δφ between the phase changes on the subcarriers 21 The maximum value of is 2π and the corresponding delay is τ max =1 / (f2-f1). Accordingly, R max =cτ max =c(f2-f1). In this case, R max is called the maximum apparent ranging distance. In other words, the sum of the distance between the first communication device and the sensing target and the distance between the second communication device and the sensing target is R max If the sum of the distance between the first communication device and the sensing target and the distance between the second communication device and the sensing target is smaller than R, then no ranging ambiguity occurs. max If this is the case, ranging ambiguity occurs.

[0314] 3002: A first communication device determines a first frequency domain resource from a frequency domain resource pool based on a minimum frequency baseline.

[0315] An example in which the first frequency domain resource includes a frequency point combination is used in the description herein. Specifically, the first communication device selects a frequency point from the frequency points included in the frequency domain resource pool to obtain a frequency point combination. This frequency point combination satisfies the minimum frequency baseline. In other words, the frequency baseline formed by the frequency points included in the frequency point combination has a length of |b min |A frequency point combination may be considered to satisfy the minimum frequency baseline if it contains a frequency baseline that is:

[0316] In step 3002, optionally, the first communication device may determine a first frequency domain resource in the following manner.

[0317] In one possible implementation, the first communication device determines a plurality of frequency point combinations that satisfy a minimum frequency baseline in a frequency domain resource pool by a depletion method, and then selects one frequency point combination from the plurality of frequency point combinations.

[0318] In another possible implementation, the first communication device uses a simulated annealing algorithm (or an ant colony algorithm) and frequency points included in the frequency domain resource pool to determine a frequency point combination that satisfies the minimum frequency baseline.

[0319] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. In this frequency point combination, the frequency points are arranged in ascending order of frequency. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6. The specific ranging distance is r max and so the length of the minimum frequency baseline is

[0320]

number

[0321] In the frequency baseline formed by two different frequency points in the frequency point combination, the length of the frequency baseline formed by frequency point 0 and frequency point 2, |f0-f2|, is the smallest. min | or less, the frequency point combination may be understood to meet the minimum frequency baseline.

[0322] It should be noted that the second communication device may also determine the first frequency domain resource according to the embodiment shown in FIG.

[0323] 2. With reference to Figure 4, the following describes a method for a first communication device to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameters when the sensing requirement parameters include a ranging resolution. Referring to Figure 4, step 201b specifically includes steps 4001 and 4002.

[0324] 4001: A first communication device determines a maximum frequency baseline based on a ranging resolution.

[0325] Specifically, the ranging resolution is Δr, so that the first communication device can determine the maximum frequency baseline length as follows:

[0326]

number

[0327] It can be determined that:

[0328] The specific principle of step 4001 will be described below. It is assumed that the first communication device performs sensing and ranging using two subcarriers. The frequencies of the two subcarriers are f1 and f2, respectively. The first communication device separately transmits sensing signals on the two subcarriers, and the sensing signals are reflected by the target point to the second communication device. The second communication device receives the reflected sensing signals. The delay of the sensing signals passing through the entire path is τ. It is assumed that the initial phases of the sensing signals on the two subcarriers are both 0 in the first communication device. In this case, after the delay τ, the phase changes of the two subcarriers are 2πf1τ and 2πf2τ, respectively.

[0329] The difference in phase change between the two subcarriers is Δφ 21 =2π(f2-f1)τ.

[0330] The second communication device measures the phase changes in the two subcarriers and calculates a difference Δφ between the phase changes in the two subcarriers. 21 In this case, τ=Δφ 21 / (2π(f2-f1)), and the sum of the distance between the first communication device and the target point and the distance between the target point and the second communication device is r=cτ=c×Δφ 21 / (2π(f2-f1)), where C is the propagation speed of light under standard atmospheric conditions.

[0331] Formula τ = Δφ 21 From the equation (2π(f2-f1)), it can be seen that a larger frequency baseline indicates a larger value of |f2-f1|. For the same delay τ, the larger the difference in phase change, i.e., Δφ 21 = 2π(f2-f1)τ indicates a larger frequency baseline and a higher sensitivity to changes in delay τ, which means it is easier to distinguish between different delays. Therefore, in step 4001, the first communication device may determine the maximum frequency baseline of the frequency point combination with reference to the ranging resolution.

[0332] It should be noted that the initial phases of the sensing signals of the two subcarriers in the first communication device may not be 0. The above is only an example and does not limit the technical solutions of the present application.

[0333] 4002: The first communication device determines a first frequency domain resource from a frequency domain resource pool based on a maximum frequency baseline.

[0334] An example in which the first frequency domain resource includes a frequency point combination is used in the description herein. Specifically, the first communication device selects a frequency point from the frequency points included in the frequency domain resource pool to obtain a frequency point combination. This frequency point combination satisfies the maximum frequency baseline. In other words, the frequency baseline formed by the frequency points included in the frequency point combination has a length of |b max | or more frequency baselines, the frequency point combination may be considered to satisfy the maximum frequency baseline.

[0335] The specific determination method of step 4002 is similar to the determination method of step 3002 in the embodiment shown in Fig. 3. For details, please refer to the relevant description of step 3002 in the embodiment shown in Fig. 3. The details will not be described again in this specification.

[0336] For example, a frequency point combination includes frequency point 0, frequency point 2, frequency point 4, and frequency point 6. In this frequency point combination, the frequency points are arranged in ascending order of frequency. The frequency of frequency point 0 is f0, the frequency of frequency point 2 is f2, the frequency of frequency point 4 is f4, and the frequency of frequency point 6 is f6. The ranging resolution is Δr, so that the length of the maximum frequency baseline is

[0337]

number

[0338] In the frequency baseline formed by two different frequency points in the frequency point combination, the length of the frequency baseline formed by frequency point 0 and frequency point 6 is |f0-f6|, where |f0-f6| is |b max |And that's it. In this case, the frequency point combination may be understood to satisfy the maximum frequency baseline.

[0339] It should be noted that the second communication device may also determine the first frequency domain resource according to the embodiment shown in FIG.

[0340] 3. With reference to Figure 5, the following describes a method for a first communication device to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameters when the sensing requirement parameters include a clear ranging distance and ranging resolution. Referring to Figure 5, step 201b specifically includes steps 5001 to 5003.

[0341] 5001: A first communication device determines a minimum frequency baseline based on a clear ranging distance.

[0342] 5002: The first communication device determines a maximum frequency baseline based on a ranging resolution.

[0343] Step 5001 is similar to step 3001 in the embodiment shown in Figure 3. For more details, see step 3 Please refer to the relevant description of 5001. The details will not be explained again in this specification. 4 4. For details, please refer to the related description of step 4001. The details will not be described again in this specification.

[0344] There is no fixed execution order between step 5001 and step 5002. Step 5001 may be performed first, followed by step 5002. Alternatively, step 5002 may be performed first, followed by step 5001. Alternatively, step 5001 and step 5002 may be performed simultaneously depending on the situation. This is not particularly limited in the present application.

[0345] 5003: The first communication device determines a first frequency domain resource from a frequency domain resource pool based on a minimum frequency baseline and a maximum frequency baseline.

[0346] An example in which the first frequency domain resource includes a frequency point combination is used in the description herein. Specifically, the first communication device selects a frequency point from the frequency points included in the frequency domain resource pool to obtain a frequency point combination. This frequency point combination satisfies the minimum frequency baseline and the maximum frequency baseline. For a related description of the case in which the frequency point combination satisfies the minimum frequency baseline and the maximum frequency baseline, please refer to the related description of the embodiment shown in Figures 3 and 4. The details will not be described again in this specification.

[0347] Optionally, the frequency point combination includes a subcarrier combination, which is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the maximum baseline length, the minimum baseline length, and the first condition.

[0348] Specifically, the first communication device uses the maximum frequency baseline length, the minimum frequency baseline length, and the first condition as constraints, and uses the minimum number of subcarriers as an optimization goal, to search for subcarrier combinations in real time and determine the subcarrier combination. There are several search algorithms for subcarrier combinations, such as an exhaustion method, a simulated annealing algorithm, and an ant colony algorithm.

[0349] It should be noted that the second communication device may also determine the first frequency domain resource according to the embodiment shown in FIG.

[0350] In the following, the frequency baseline redundancy case of this embodiment of the present application is described.

[0351] For example, as shown in FIG. 6A, the frequencies of the subcarriers included in the subcarrier combination are separately set to f0, f 1、 The subcarriers included in the subcarrier combination are sorted in ascending order of frequency. The frequency interval between adjacent subcarriers is the same. In other words, the subcarriers included in the subcarrier combination are evenly distributed in the frequency domain. Frequency baseline b 21 = f2 - f1 may be formed by f1 and f2, and the frequency baseline b 32 = f3 - f2 may be formed by f2 and f3. Since the subcarriers are evenly distributed, f2 - f1 = f3 - f2, in other words, the frequency baseline b 21 and frequency baseline b 32 are the same frequency baseline. In this case, there is frequency baseline redundancy.

[0352] Physically, the same result is obtained by performing a phase difference measurement using subcarriers with separate frequencies f1 and f2 as by performing a phase difference measurement using subcarriers with separate frequencies f2 and f3. In the case of frequency baseline redundancy, the phase difference between multiple subcarriers cannot be used to obtain more information about the surrounding environment. Therefore, a larger amount of frequency baseline redundancy indicates more wasted subcarrier resources.

[0353] In this embodiment of the present application, there are multiple subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition. The subcarriers included in the subcarrier combinations may be evenly or unevenly distributed in the frequency domain.

[0354] Below, with reference to FIGS. 6A and 6B, a case will be described in which the subcarriers included in the subcarrier combination are evenly distributed.

[0355] For example, as shown in FIG. 6A, the frequencies of the subcarriers included in the subcarrier combination are separately set to f0, f 1、 The subcarriers in a subcarrier combination are sorted in ascending order of frequency. The frequency interval between adjacent subcarriers is the same. In other words, the subcarriers in a subcarrier combination are evenly distributed in the frequency domain.

[0356] For example, f0, f 1、 f2, f3, f4, f5, and f6 are respectively 0, 1, 2, 3, 4, 5, and 6. The first communication device performs sensing and ranging using the subcarriers included in the subcarrier combination. The frequency baseline formed by the subcarriers included in the subcarrier combination has a minimum frequency baseline length |b min | is 1 and the length of the maximum frequency baseline |b max | is 6. Figure 6B shows the coverage situation of the frequency baseline formed by the subcarrier combination and the redundancy situation of the frequency baseline. From Figure 6B, it can be seen that the length of k|b min | frequency baselines may be formed by subcarrier combinations, where k can be understood to belong to [-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6]. Therefore, the frequency baseline coverage is complete. However, there is a large redundancy in some frequency baselines. For example, the redundancy amount of frequency baseline 1 is 6, in other words, there are six identical frequency baselines.

[0357] Note that the frequency baseline 0 shown in Figure 6B is merely a frequency baseline formed by the frequency points included in the frequency point combination. However, in actual application, the first communication device sends out a sensing signal once for each subcarrier in the subcarrier combination.

[0358] The receiving end of the sensing signal obtains the same information from the redundant frequency baselines. As a result, subcarrier resources are wasted and more information cannot be obtained. However, the measurement noises of the redundant baselines are independent of each other, and redundancy averaging can be performed on the redundant baselines to improve the measurement signal-to-noise ratio. Therefore, in practical application, the first communication device and / or the second communication device can select corresponding subcarrier combinations based on the signal-to-noise ratio requirement in the sensing measurement process. When the signal-to-noise ratio requirement is high, the frequency baselines formed by the subcarrier combinations selected by the first communication device and / or the second communication device may have a large amount of redundant baselines, thereby improving the measurement signal-to-noise ratio. When the signal-to-noise ratio requirement is high, low In this case, the frequency baseline formed by the subcarrier combinations selected by the first communication device and / or the second communication device may have a small amount of redundant baseline, thereby reducing resource waste.

[0359] 7A and 7B, a case where the subcarriers included in the subcarrier combination are unevenly distributed will be described below. For example, as shown in FIG. 7A, the frequencies of the subcarriers included in the subcarrier combination are separately f0, f 1、 The subcarriers included in the subcarrier combination are sorted in ascending order of frequency, and are distributed unevenly in the frequency domain.

[0360] For example, f0, f 1、f4 and f6 are 0, 1, 4, and 6, respectively. The first communication device performs sensing and ranging using the subcarriers included in the subcarrier combination. The frequency baseline formed by the subcarriers included in the subcarrier combination has a minimum frequency baseline length |b min | is 1 and the length of the maximum frequency baseline |b max | is 6. Figure 7B shows the coverage status of the frequency baseline and the redundancy status of the frequency baseline that can be determined based on the subcarrier combination. From Figure 7B, it can be seen that the length k|b min A frequency baseline of | may be formed by the subcarrier combination, where k can be understood to belong to [-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6]. Thus, the frequency baseline coverage is complete.

[0361] 7B, it can be seen that only frequency baseline 0 has redundancy, and other frequency baselines have no redundancy. Therefore, it can be seen that unevenly distributed subcarrier combinations can also obtain complete frequency baseline coverage and reduce the number of redundant frequency baselines. Therefore, the solution of unevenly distributed subcarrier combinations can effectively reduce the number of redundant frequency baselines, thus reducing the number of subcarriers and reducing the overhead of subcarrier resources used for sensing.

[0362] It should be noted that the frequency baseline 0 shown in Figure 7B is merely a frequency baseline formed by the frequency points included in the frequency point combination, but in actual application, the first communication device sends out a sensing signal once for each subcarrier in the subcarrier combination.

[0363] Therefore, in the embodiments shown in Figures 3, 4, and 5, the first communication device may select an unevenly distributed subcarrier combination as the first frequency domain resource to reduce waste of subcarrier resources.

[0364] In step 201 of the embodiment shown in Figure 2A, the first frequency domain resource includes a frequency point combination. The frequency point combination includes a subcarrier combination. This subcarrier combination is a subcarrier combination with the smallest number of subcarriers among subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition. In this case, it can be understood from the related description of Figures 7A and 7B that the subcarrier combination is a subcarrier combination that is unevenly distributed. Thus, this subcarrier combination is a subcarrier combination that satisfies the minimum frequency baseline, the maximum frequency baseline, and the first condition and includes the smallest number of subcarriers.

[0365] The following describes a first communication device according to an embodiment of the present application. Figure 8 is a schematic diagram of the structure of the first communication device according to this embodiment of the present application. The first communication device can be configured to perform the steps performed by the first communication device of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. For details, please refer to the related descriptions of the above method embodiments.

[0366] The first communication device includes a processing module 801 and a transceiver module 802 .

[0367] The processing module 801 is configured to determine a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter.

[0368] The transceiver module 802 is configured to transmit the sensing signal on a first frequency domain resource.

[0369] In a possible implementation, the sensing requirement parameters include at least one of a clear ranging distance or ranging resolution.

[0370] In another possible implementation, the transceiver module 802 may include: Get sensing requirement parameters It is further configured as follows.

[0371] The processing module 801 It is particularly configured to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0372] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0373] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0374] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0375] In another possible implementation, the first frequency domain resource includes a frequency point combination that satisfies a first condition, where a frequency baseline formed by frequency points included in the frequency point combination includes a frequency baseline of a first length, where the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], where K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and where K is greater than or equal to 1.

[0376] In another possible implementation, the frequency point combination includes a subcarrier combination, which is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

[0377] In another possible implementation, the transceiver module 802 may include: Further configured to send first information to the second communication device, the first information indicating a frequency domain location of the first frequency domain resource.

[0378] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0379] In another possible implementation, the first information is carried in RRC signaling or DCI signaling.

[0380] In another possible implementation, the transceiver module 802 may include: It is further configured to send trigger signaling to the second communication device, where the trigger signaling is used to trigger the second communication device to enable the sensing function.

[0381] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0382] In another possible implementation, the transceiver module 802 may include: It is particularly configured to receive the sensing requirement parameters from the third communication device.

[0383] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0384] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0385] In this embodiment of the present application, the processing module 801 is configured to determine a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter. The transceiver module 802 is configured to send a sensing signal on the first frequency domain resource. It can be understood that the first frequency domain resource is selected from the frequency domain resource pool based on the sensing requirement parameter. The transceiver module 802 may send the sensing signal on the first frequency domain resource. In this manner, the first communication device may perform sensing of the surrounding environment by sending the sensing signal while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this manner, the sensing requirement can be met and sensing performance can be improved.

[0386] The following describes a second communication device according to an embodiment of the present application. Figure 9 is a schematic diagram of the structure of the second communication device according to this embodiment of the present application. The second communication device can be configured to perform the steps performed by the second communication device in the embodiments shown in Figures 2A, 2C, and 2D. For details, please refer to the relevant descriptions of the above method embodiments.

[0387] The second communication device includes a processing module 901 and a transceiver module 902 .

[0388] The processing module 901 is configured to determine a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on the sensing requirement parameter.

[0389] The transceiver module 902 is configured to receive a sensing signal from a first communication device on a first frequency domain resource.

[0390] The processing module 901 is further configured to perform a sensing measurement of the sensing signal to obtain a sensing result.

[0391] In a possible implementation, the sensing requirement parameters include at least one of a clear ranging distance or ranging resolution.

[0392] In another possible implementation, the transceiver module 902 may include: The communication device is further configured to receive first information from the first communication device, the first information indicating a frequency domain location of the first frequency domain resource.

[0393] In another possible implementation, the first information includes a frequency domain location of the first frequency domain resource. Alternatively, the first information includes a sensing quality index, and the sensing quality index indicates the frequency domain location of the first frequency domain resource.

[0394] In another possible implementation, the first information is carried in RRC signaling or DCI signaling.

[0395] In another possible implementation, the transceiver module 902 may include: It is further configured to obtain a sensing requirement parameter.

[0396] The processing module 901 It is particularly configured to determine a first frequency domain resource from a frequency domain resource pool based on the sensing requirement parameter.

[0397] In another possible implementation, the sensing requirement parameters include a definite ranging distance, the first frequency domain resource satisfies a minimum frequency baseline, and the minimum frequency baseline is determined based on the definite ranging distance.

[0398] Alternatively, the sensing requirement parameters include a ranging resolution, the first frequency domain resource satisfies a maximum frequency baseline, and the maximum frequency baseline is determined based on the ranging resolution.

[0399] Alternatively, the sensing requirement parameters include a clear ranging distance and ranging resolution, and the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

[0400] In another possible implementation, the transceiver module 902 may include: It is further configured to receive trigger signaling from the first communication device, the trigger signaling being used to trigger the second communication device to enable the sensing function.

[0401] In another possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0402] In another possible implementation, the frequency domain resource pool comprises frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices.

[0403] Alternatively, the frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0404] In this embodiment of the present application, the processing module 901 is configured to determine a first frequency domain resource, where the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter. The transceiver module 902 is configured to receive a sensing signal from a first communication device on the first frequency domain resource. The processing module 901 is further configured to perform sensing measurements on the sensing signal to obtain sensing results. It can be understood that the first frequency domain resource is selected from the frequency domain resource pool based on the sensing requirement parameter. The transceiver module 902 receives the sensing signal from the first communication device on the first frequency domain resource. In this way, the second communication device can sense the surrounding environment by receiving the sensing signal from the first communication device while communicating. Furthermore, the first frequency domain resource is determined with reference to the sensing requirement parameter. In this way, the sensing requirement can be met and sensing performance can be improved.

[0405] The present application further provides a first communication device. Figure 10 is another schematic diagram of the structure of the first communication device according to an embodiment of the present application. The first communication device may be configured to perform the steps performed by the first communication device of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. For details, please refer to the related descriptions of the aforementioned method embodiments.

[0406] The first communications device includes a processor 1001 and a transceiver 1003. Optionally, the communications device further includes a memory 1002.

[0407] In a possible implementation, the processor 1001, memory 1002 and transceiver 1003 are connected via a bus, with the memory storing computer instructions.

[0408] The processor 1001 of this embodiment may perform the operations performed by the processing module 801 shown in Figure 8. Specific implementation details of the processor 1001 will not be described. The transceiver 1003 of this embodiment may perform the operations performed by the transceiver module 802 of the previous embodiment. Specific implementation details of the transceiver 1003 will not be described.

[0409] 10, the processor 1001 and the memory 1002 may be integrated or separately arranged, which is not particularly limited in the present application.

[0410] It should be noted that the memory 1002 shown in FIG. 10 may alternatively be located external to the first communications device shown in FIG.

[0411] The present application further provides a second communication device. Figure 11 is another schematic diagram of the structure of a second communication device according to an embodiment of the present application. The second communication device may be configured to perform the steps performed by the second communication device in the embodiments shown in Figures 2A, 2C, and 2D. For details, please refer to the relevant descriptions of the aforementioned method embodiments.

[0412] The second communications device includes a processor 1101 and a transceiver 1103. Optionally, the communications device further includes a memory 1102.

[0413] In a possible implementation, the processor 1101, memory 1102 and transceiver 1103 are connected via a bus, with the memory storing computer instructions.

[0414] The processor 1101 of this embodiment may perform the operations performed by the processing module 901 shown in Figure 9. Specific implementation details of the processor 1101 will not be described. The transceiver 1103 of this embodiment may perform the operations performed by the transceiver module 902 of the previous embodiment. Specific implementation details of the transceiver 1103 will not be described.

[0415] 11, the processor 1101 and the memory 1102 may be integrated or separately arranged, which is not particularly limited in the present application.

[0416] It should be noted that the memory 1102 shown in FIG. 11 may alternatively be located external to the second communications device shown in FIG.

[0417] The following shows, with reference to FIG. 12, a schematic diagram of a possible structure of a terminal device which is a first communication device or a second communication device.

[0418] FIG. 12 is a simplified schematic diagram of the structure of a terminal device. For ease of understanding and illustration, in FIG. 12, the terminal device is a mobile phone used as an example. As shown in FIG. 12, the terminal device includes a processor, a memory, a high-frequency circuit, an antenna, and optional input / output devices. The processor is mainly configured to process communication protocols and communication data, control the terminal device, execute software programs, process data of the software programs, etc. The memory is mainly configured to store software programs and data. The high-frequency circuit is mainly configured to convert between baseband signals and high-frequency signals and process high-frequency signals. The antenna is mainly configured to transmit and receive high-frequency signals in the form of electromagnetic waves. The input / output devices, such as a touchscreen, a display, or a keyboard, are mainly configured to receive data input by a user and output data to a user. It should be noted that some types of terminal devices may not have input / output devices.

[0419] When data needs to be transmitted, the processor performs baseband processing of the data to be transmitted and outputs the baseband signal to the radio-frequency circuit. The radio-frequency circuit performs radio-frequency processing of the baseband signal and then transmits the radio-frequency signal to the outside via an antenna in the form of electromagnetic waves. When data is transmitted to the terminal device, the radio-frequency circuit receives the radio-frequency signal via the antenna, converts the radio-frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, FIG. 12 shows only one memory and one processor. An actual terminal device product may have one or more processors and one or more memories. The memory may also be referred to as a storage medium, a storage device, etc. The memory may be located independently of the processor or integrated with the processor. This is not a limitation in this embodiment of the present application.

[0420] In this embodiment of the present application, the antenna and the radio frequency circuit having the transmitting and receiving functions may be regarded as a transceiver unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device. As shown in FIG. 12, the terminal device includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit may also be referred to as a transceiver, a transceiver machine, a transceiver device, etc. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, etc. Optionally, a component in the transceiver unit 1210 configured to perform the receiving function may be regarded as a receiving unit, and a component in the transceiver unit 1210 configured to perform the sending function may be regarded as a sending unit. That is, the transceiver unit 1210 includes a receiving unit and a sending unit. The transceiver unit may also be referred to as a transceiver machine, a transceiver, a transceiver circuit, etc. The receiving unit may also be referred to as a receiver machine, a receiver, a receiving circuit, etc. The sending unit may also be referred to as a transmitter machine, a transmitter, a sending circuit, etc.

[0421] In a possible implementation, the transceiver unit 1210 is configured to perform the transmission and reception operations of the first communication device of the aforementioned method embodiments, and the processing unit 1220 is configured to perform operations other than the transmission and reception operations of the first communication device of the aforementioned method embodiments.

[0422] For example, processing unit 12 20 2A. Transceiver unit 1210 is configured to perform steps 202, 203, 206, and 202a of FIG. 2A.

[0423] In another possible implementation, the transceiver unit 1210 is configured to perform the transmission and reception operations of the second communication device of the aforementioned method embodiments, and the processing unit 1220 is configured to perform operations other than the transmission and reception operations of the second communication device of the aforementioned method embodiments.

[0424] For example, processing unit 12 20 2A. Transceiver unit 1210 is configured to perform steps 202, 203, 206, and 202a of FIG. 2A.

[0425] When the terminal device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface. The processing unit may be a processor, a microprocessor, an integrated circuit, or a logic circuit integrated on the chip.

[0426] Referring to Figure 13, an embodiment of the present application further provides a communication system. The communication system includes a first communication device shown in Figure 8 and a second communication device shown in Figure 9. The first communication device shown in Figure 8 is configured to perform all or part of the steps performed by the first communication device in the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. The second communication device shown in Figure 9 is configured to perform all or part of the steps performed by the second communication device in the embodiments shown in Figures 2A, 2C, and 2D.

[0427] An embodiment of the present application further provides a computer program product including computer instructions, which, when run on a computer, performs the communication methods of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5.

[0428] An embodiment of the present application further provides a computer-readable storage medium containing computer instructions, which, when executed on a computer, perform the communication methods of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5.

[0429] An embodiment of the present application further provides a chip device including a processor configured to connect to a memory and to invoke a program stored in the memory, thereby causing the processor to perform the communication method of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5.

[0430] The aforementioned processor may be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling program execution of the communication methods of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. The aforementioned memory may be a read-only memory (ROM), another type of static storage device capable of storing static information and instructions, a random access memory (RAM), etc.

[0431] For the sake of convenient and concise description, those skilled in the art can clearly understand that the detailed work processes of the systems, devices, and units described above refer to the corresponding processes of the method embodiments described above, and the details will not be described again in this specification.

[0432] In some embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the described device embodiments are merely examples. For example, the division into units is merely a logical division of function, and other divisions may be used in actual implementation. For example, multiple units or components may be combined or integrated to form another system, or some features may be omitted or not implemented. In addition, the shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electrical, mechanical, or other forms.

[0433] The units described as separate parts may or may not be physically separated, and the parts shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments.

[0434] In addition, the functional units of the embodiments of the present application may be integrated into one processing unit, each of the units may exist physically alone, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0435] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on this understanding, the essential technical solution of the present application, or a portion contributing to the current technology, or all or part of the technical solution may be implemented in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium capable of storing program code, such as a USB flash drive, a removable hard disk, a read-only memory, a random access memory, a magnetic disk, or a compact disk.

[0436] In conclusion, the above embodiments are only for illustrating the technical solutions of the present application, and do not limit the present application. Although the present application has been described in detail with respect to the above embodiments, those skilled in the art should understand that they can still make changes to the technical solutions recorded in the above embodiments, or make equivalent substitutions for some technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present application.

Claims

1. 1. A method of communication, the method comprising: determining a first frequency domain resource by a first communication device, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter; transmitting a sensing signal by the first communication device on the first frequency domain resource; Including, The communication method, wherein the sensing requirement parameters include an explicit ranging distance, and the first frequency domain resource satisfies a minimum frequency baseline, the minimum frequency baseline being determined based on the explicit ranging distance.

2. The method comprises: further comprising obtaining the sensing requirement parameters by the first communication device; The step of determining a first frequency domain resource by the first communication device comprises: The method of claim 1 , comprising determining, by the first communication device, the first frequency domain resource from the frequency domain resource pool based on the sensing requirement parameter.

3. The step of obtaining the sensing requirement parameters by the first communication device comprises: The method of claim 2 , comprising receiving, by the first communication device, the sensing requirement parameters from a third communication device.

4. The sensing requirement parameters further include a ranging resolution; the first frequency domain resource satisfies a maximum frequency baseline, the maximum frequency baseline being determined based on the ranging resolution; or The method of claim 1 , wherein the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

5. the first frequency domain resource includes a frequency point combination, the frequency point combination satisfies a first condition; the first condition includes a frequency baseline formed by frequency points included in the frequency point set including a frequency baseline of a first length; 5. The method of claim 4, wherein the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], where K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and where K is greater than or equal to 1.

6. 6. The method of claim 5, wherein the frequency point combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination with a minimum number of subcarriers among the subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

7. The method comprises:

7. The method of claim 1, further comprising the step of sending, by the first communication device, first information to a second communication device, the first information indicating a frequency domain location of the first frequency domain resource.

8. the first information includes the frequency domain location of the first frequency domain resource; or The method of claim 7 , wherein the first information includes a sensing quality index, the sensing quality index indicating the frequency domain location of the first frequency domain resource.

9. The method according to claim 7 or 8, wherein the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

10. The method comprises:

10. The method of claim 1, further comprising the step of sending trigger signaling by the first communication device to a second communication device, the trigger signaling being used to trigger the second communication device to enable a sensing function.

11. The method of claim 10 , wherein the type of trigger signaling includes RRC signaling or DCI signaling.

12. the frequency domain resource pool includes frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices; or 12. The method of claim 1, wherein the frequency domain resource pool comprises frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

13. 1. A method of communication, the method comprising: determining, by a second communication device, a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter; receiving, by the second communication device, a sensing signal from the first communication device on the first frequency domain resource; performing a sensing measurement of the sensing signal by the second communication device to obtain a sensing result; Including, The communication method, wherein the sensing requirement parameters include an explicit ranging distance, and the first frequency domain resource satisfies a minimum frequency baseline, the minimum frequency baseline being determined based on the explicit ranging distance.

14. The method comprises:

14. The method of claim 13, further comprising receiving, by the second communication device, first information from the first communication device, the first information indicating a frequency domain location of the first frequency domain resource.

15. the first information includes the frequency domain location of the first frequency domain resource; or The method of claim 14 , wherein the first information includes a sensing quality index, the sensing quality index indicating the frequency domain location of the first frequency domain resource.

16. The method comprises: further comprising obtaining the sensing requirement parameters by the second communication device; The step of determining a first frequency domain resource by a second communication device comprises: The method of claim 13, comprising determining, by the second communication device, the first frequency domain resource from the frequency domain resource pool based on the sensing requirement parameter.

17. The sensing requirement parameters further include a ranging resolution; the first frequency domain resource satisfies a maximum frequency baseline, the maximum frequency baseline being determined based on the ranging resolution; or 17. The method of any one of claims 13 to 16, wherein the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

18. The method comprises:

18. The method of claim 13, further comprising receiving, by the second communication device, trigger signaling from the first communication device, the trigger signaling being used to trigger the second communication device to enable a sensing function.

19. 20. The method of claim 18, wherein the type of trigger signaling includes radio resource control (RRC) signaling or downlink control information (DCI) signaling.

20. the frequency domain resource pool includes frequency domain resources used for transmitting channel state information reference signals between the first communication device and the second communication device; or 20. The method of any one of claims 13 to 19, wherein the frequency domain resource pool comprises frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

21. a first communication device, the first communication device comprising: a processing module configured to determine a first frequency domain resource, the first frequency domain resource being determined from a frequency domain resource pool based on a sensing requirement parameter; and a transceiver module configured to transmit a sensing signal on the first frequency domain resource; Equipped with The communications device, wherein the sensing requirement parameters include an explicit ranging distance, and the first frequency domain resource satisfies a minimum frequency baseline, the minimum frequency baseline being determined based on the explicit ranging distance.

22. The transceiver module includes: further configured to obtain the sensing requirement parameters; The processing module includes:

22. The communications device of claim 21, specifically configured to determine the first frequency domain resource from the frequency domain resource pool based on the sensing requirement parameter.

23. The transceiver module includes:

23. A communication device according to claim 22, specifically configured to receive the sensing requirement parameters from a third communication device.

24. The sensing requirement parameters further include a ranging resolution; the first frequency domain resource satisfies a maximum frequency baseline, the maximum frequency baseline being determined based on the ranging resolution; or 24. The communications device of claim 21, wherein the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

25. the first frequency domain resource includes a frequency point combination, the frequency point combination satisfies a first condition; the first condition includes a frequency baseline formed by frequency points included in the frequency point set including a frequency baseline of a first length; 25. The communications device of claim 24, wherein the first length is k times the length of the minimum frequency baseline, where k is a positive integer in [1, K], where K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and where K is greater than or equal to 1.

26. 26. The communication device of claim 25, wherein the frequency point combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination with a minimum number of subcarriers among subcarrier combinations that satisfy the minimum frequency baseline, the maximum frequency baseline, and the first condition.

27. The transceiver module includes:

27. The communications device of any one of claims 21 to 26, further configured to send first information to a second communications device, the first information indicating a frequency domain location of the first frequency domain resource.

28. the first information includes the frequency domain location of the first frequency domain resource; or 28. The communications device of claim 27, wherein the first information comprises a sensing quality index, the sensing quality index indicating the frequency domain location of the first frequency domain resource.

29. 29. The communications device of claim 27 or 28, wherein the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

30. The transceiver module includes:

29. The communication device of any one of claims 21 to 28, further configured to send trigger signaling to a second communication device, the trigger signaling being used to trigger the second communication device to enable a sensing function.

31. 31. The communications device of claim 30, wherein the type of trigger signaling includes RRC signaling or DCI signaling.

32. the frequency domain resource pool includes frequency domain resources used for transmitting channel state information reference signals between the first and second communication devices; or 32. The communications device of claim 21, wherein the frequency domain resource pool includes frequency domain resources used for transmitting communications data between the first communications device and the second communications device.

33. a second communication device, the second communication device comprising: a processing module configured to determine a first frequency domain resource, the first frequency domain resource being determined from a frequency domain resource pool based on a sensing requirement parameter; and a transceiver module configured to receive a sensing signal from a first communication device on the first frequency domain resource; the processing module is further configured to perform a sensing measurement of the sensing signal to obtain a sensing result; The communications device, wherein the sensing requirement parameters include an explicit ranging distance, and the first frequency domain resource satisfies a minimum frequency baseline, the minimum frequency baseline being determined based on the explicit ranging distance.

34. The transceiver module includes:

34. The communications device of claim 33, further configured to receive first information from the first communications device, the first information indicating a frequency domain location of the first frequency domain resource.

35. the first information includes the frequency domain location of the first frequency domain resource; or 35. The communications device of claim 34, wherein the first information comprises a sensing quality index, the sensing quality index indicating the frequency domain location of the first frequency domain resource.

36. The transceiver module includes: further configured to obtain the sensing requirement parameters; The processing module includes:

34. The communications device of claim 33, further configured to determine the first frequency domain resource from the frequency domain resource pool based on the sensing requirement parameter.

37. The sensing requirement parameters further include a ranging resolution; the first frequency domain resource satisfies a maximum frequency baseline, the maximum frequency baseline being determined based on the ranging resolution; or 37. The communications device of claim 33, wherein the first frequency domain resource satisfies a minimum frequency baseline and a maximum frequency baseline.

38. The transceiver module includes:

38. A communication device according to any one of claims 33 to 37, further configured to receive trigger signalling from the first communication device, the trigger signalling being used to trigger the second communication device to enable a sensing function.

39. 39. The communications device of claim 38, wherein the type of trigger signaling includes radio resource control (RRC) signaling or downlink control information (DCI) signaling.

40. the frequency domain resource pool includes frequency domain resources used for transmitting channel state information reference signals between the first communication device and the second communication device; or 40. The communications device of claim 33, wherein the frequency domain resource pool includes frequency domain resources used for transmitting communications data between the first communications device and the second communications device.

41. A communication device, the communication device comprising: a processor and a memory; the memory is configured to store a computer program; A communications device, wherein the processor is configured to invoke and execute the computer program stored in the memory to enable the communications device to perform the method of any one of claims 1 to 12.

42. A computer readable storage medium comprising computer instructions which, when executed on a computer, perform the method of any one of claims 1 to 12.

43. A computer program comprising computer instructions which, when executed on a computer, perform the method of any one of claims 1 to 12.

44. A communication system, said communication system comprising a communication device according to any one of claims 21 to 32 and a communication device according to any one of claims 33 to 40.

45. 1. A communication device, the communication device comprising: a processor and a transceiver; A communications device, wherein the processor is configured to perform processing operations according to any one of claims 1 to 12, and the transceiver is configured to perform transmitting and receiving operations according to any one of claims 1 to 12.

46. A communication device, the communication device comprising: a processor and a memory; the memory is configured to store a computer program; 21. A communications device, wherein the processor is configured to invoke and execute the computer program stored in the memory to enable the communications device to perform the method of any one of claims 13 to 20.

47. 21. A computer readable storage medium comprising computer instructions which, when executed on a computer, perform the method of any one of claims 13 to 20.

48. A computer program comprising computer instructions which, when executed on a computer, perform the method of any one of claims 13 to 20.

49. 1. A communication device, the communication device comprising: a processor and a transceiver; A communications device, wherein the processor is configured to perform processing operations according to any one of claims 13 to 20, and the transceiver is configured to perform transmitting and receiving operations according to any one of claims 13 to 20.

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