Wireless communication method and device

Abstract

The invention relates to the technical field of communication, and discloses a wireless communication method and device, which can realize perception of surrounding environment while performing communication, and can reduce interference caused by frequency selective fading. The method comprises: a first communication device determining a first frequency domain resource, a frequency baseline formed by the first frequency domain resource satisfying P redundancy distribution, P being a positive integer; a first communication device transmits a sensing signal on a first frequency domain resource. The P-redundancy distribution meets a first condition and a second condition; the first condition comprises that a frequency baseline formed by the first frequency domain resource comprises a frequency baseline with a first length; the first length is k * the length of the minimum frequency baseline, k is a positive integer belonging to [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1; the second condition comprises that the number of redundancy distribution times of the frequency baselines formed by the first frequency domain resources except the maximum P-1 frequency baselines and the minimum P-1 frequency baselines is greater than or equal to P.

Description

Wireless communication method and device Technical Field

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

[0002] Wireless sensing technology analyzes changes in wireless signals during propagation to determine the characteristics of the signal transmission space, enabling the perception of objects or people in the environment. For example, wireless sensing technology can be used to perceive people, buildings, vehicles, and other objects in the environment.

[0003] Radar is a classic wireless sensing technology with widespread applications in military, agriculture, meteorology, and other fields. The basic principle of radar is that a transmitter transmits a specific waveform signal, which is received by a receiver through a wireless channel. Signal processing is performed on the combined transmitted and received signals to identify targets of interest in the wireless channel. Wireless communication systems, on the other hand, primarily facilitate information exchange between transceivers. Their basic principle is that a transmitter transmits a specific waveform signal, which is received by a receiver after passing through a wireless channel. After signal processing, the receiver demodulates the transmitted signal.

[0004] How to integrate wireless communication and sensing technology to achieve wireless communication while sensing the surrounding environment is a problem that needs to be solved urgently.

[0005] Summary of the Invention

[0006] The present application provides a wireless communication method and apparatus for enabling a communication device to perceive the surrounding environment while communicating, thereby reducing interference caused by frequency selective fading.

[0007] In a first aspect, an embodiment of the present application provides a wireless communication method, the method comprising:

[0008] The first communication device determines a first frequency domain resource, where a frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer; the first communication device sends a perception signal on the first frequency domain resource.

[0009] In this embodiment, the frequency baselines satisfy P-fold redundant distribution. When frequency selective fading causes measurement failure of some frequency baselines, there are still redundant frequency baselines that can provide coverage, thereby reducing interference caused by frequency selective fading.

[0010] In one possible implementation, the P-fold redundancy distribution satisfies the first condition and the second condition;

[0011] The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length;

[0012] The first length is k*the length of the minimum frequency baseline, where k is a positive integer in the range [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1;

[0013] The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and smallest P-1 frequency baselines, have a redundant distribution number greater than or equal to P.

[0014] In a possible implementation, the value of P is set based on the degree of frequency selective fading.

[0015] In this implementation, when the degree of frequency selective fading is large, a larger P value is set to obtain more redundancy to resist interference; when the degree of frequency selective fading is small, a smaller P value is set to save frequency domain resources.

[0016] In a possible implementation, the value of P is set based on a frequency response amplitude difference.

[0017] In this implementation, the frequency response amplitude difference can reflect the degree of frequency selective fading. The larger the frequency response amplitude difference, the greater the degree of frequency selective fading, and the smaller the frequency response amplitude difference, the smaller the degree of frequency selective fading. The frequency response amplitude difference is easier to obtain.

[0018] In a possible implementation, the frequency response amplitude difference includes at least one of the following: a ratio of a maximum frequency response amplitude to a minimum frequency response amplitude, a ratio of a variance of the frequency response amplitude to a square of a mean frequency response amplitude, and a ratio of a standard deviation of the frequency response amplitude to a mean frequency response amplitude.

[0019] In this implementation, a specific representation of the frequency response amplitude difference is provided to facilitate setting the value of P.

[0020] In a possible implementation, the method further includes:

[0021] The first communication device obtains the perception demand parameter; the first communication device determines the first frequency domain resource, including: the first communication device determines the first frequency domain resource from the frequency domain resource pool according to the perception demand parameter.

[0022] In this possible implementation, a specific implementation of a first communication device determining a first frequency domain resource is provided. The first communication device can obtain a perception requirement parameter and determine the first frequency domain resource based on the perception requirement parameter, thereby meeting perception requirements and improving perception performance.

[0023] In a possible implementation manner, the first communication device acquiring the perception requirement parameter includes: the first communication device receiving the perception requirement parameter from a third communication device.

[0024] In this implementation, the sensing requirement parameter may be sent to the first communication device by the third communication device. The third communication device may be understood as a control node that controls the first communication device to send the sensing signal.

[0025] In a possible implementation, the perception requirement parameter includes a ranging unambiguous distance, the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

[0026] In a possible implementation, the sensing requirement parameter includes a ranging resolution, the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0027] In a possible implementation, the perception requirement parameter includes a perception resource occupancy rate, the first frequency domain resource satisfies a maximum number of frequency domain resources N, and the maximum number of frequency domain resources N is determined according to the perception resource occupancy rate.

[0028] In the above possible implementations, multiple possible implementations of the specific content included in the perception demand parameter are provided, as well as requirements that the first frequency domain resource should meet based on these implementations.

[0029] In a possible implementation, the frequency combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination that includes the least number of subcarriers among subcarrier combinations that satisfy P redundancy.

[0030] In this possible implementation, there may be multiple subcarrier combinations that meet the aforementioned P-level redundancy. The subcarrier combination may be the one with the least number of subcarriers among the multiple subcarrier combinations, thereby effectively saving subcarrier overhead in the frequency domain and avoiding occupying excessive communication resources and affecting communication performance.

[0031] In a possible implementation, the first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

[0032] In this possible implementation, frequency domain overhead is saved while satisfying the condition of P-fold redundancy distribution.

[0033] In a possible implementation, the first frequency domain resources include frequency point combinations that meet the first condition and are shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; |b min | is the minimum frequency baseline.

[0034] In one possible implementation, the first frequency domain resources include: {1, 2, ..., N1+P, 2*(N1+1), 2*(N1+1)+1, ..., 2*(N1+1)+P-1, ..., N2*(N1+1), N2*(N1+1)+1, ..., N2*(N1+1)+P-1}*|b min |;|b min | is the minimum frequency baseline, N1 and N2 are positive integers.

[0035] In the above possible implementation manners, the first frequency domain resources can be constructed simply and quickly.

[0036] In one possible implementation, N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |,|b max | is the maximum frequency baseline.

[0037] In one possible implementation, N1, N2, and P satisfy N≥N1+P*N2, where N is the maximum number of frequency domain resources.

[0038] In the above possible implementations, parameter restrictions are given to facilitate reasonable setting of parameter values.

[0039] In one possible implementation, P is the maximum value that satisfies the constraint conditions.

[0040] In this possible implementation, maximum redundancy can be obtained and interference can be avoided to a greater extent.

[0041] In a possible implementation, the method further includes: the first communication device sending first information to the second communication device, where the first information is used to indicate a frequency domain position of the first frequency domain resource.

[0042] In this possible implementation, the first communication device indicates the frequency domain location of the first frequency domain resource to the second communication device, so that the second communication device can receive the perception signal on the frequency domain resource of the first frequency domain resource, thereby achieving perception measurement of the surrounding environment.

[0043] In one possible implementation, the first information includes frequency domain resource construction parameters, which are used to construct the first frequency domain resource; or, the first information includes the frequency domain position of the first frequency domain resource; or, the first information includes a perceptual quality index, which is used to indicate the frequency domain position of the first frequency domain resource.

[0044] In this possible implementation, three specific implementations are provided in which the first information indicates the frequency domain position of the first frequency domain resource. Specifically, the first information can directly indicate the frequency domain position of the first frequency domain resource, and the indication method is simple. Alternatively, the first information indirectly indicates the frequency domain position of the first frequency domain resource by means of an index. This indication method requires fewer indication bits and can save the overhead of the indication bits. Alternatively, the first information indirectly indicates the frequency domain position of the first frequency domain resource by means of a frequency domain resource construction parameter, which can save the overhead of the indication bits and is more flexible.

[0045] In another possible implementation manner, the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0046] In this possible implementation, two possible signalings for carrying the first information are provided, providing a basis for embodiments of the solution.

[0047] In a possible implementation, the method further includes: the first communication device sends a trigger signaling to the second communication device, where the trigger signaling is used to trigger the second communication device to activate a perception function.

[0048] In this possible implementation, a triggering condition for the second communication device to enable the sensing function is provided, providing a basis for an embodiment of the solution.

[0049] In a possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0050] In this implementation, the second communication device can be triggered to enable the perception function through RRC signaling or DCI signaling.

[0051] In one possible implementation, the frequency domain resource pool includes frequency domain resources for transmitting channel state information reference signals between the first communication device and the second communication device; or, the frequency domain resource pool includes frequency domain resources for transmitting communication data between the first communication device and the second communication device.

[0052] In this possible implementation, two possible communication resources included in a frequency domain resource pool are provided, which can be used to select a first frequency domain resource, thereby enabling the communication device to perceive the surrounding environment while communicating.

[0053] In a second aspect, an embodiment of the present application provides a wireless communication method, the method comprising:

[0054] The second communication device determines a first frequency domain resource, where a frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer; the second communication device receives a perception signal from the first communication device on the first frequency domain resource.

[0055] In a possible implementation manner, the method further includes: the second communication device performing perception measurement on the perception signal to obtain a perception result.

[0056] In this embodiment, the frequency baselines satisfy P-fold redundant distribution. When frequency selective fading causes measurement failure of some frequency baselines, there are still redundant frequency baselines that can provide coverage, thereby reducing interference caused by frequency selective fading.

[0057] In one possible implementation, the P-fold redundancy distribution satisfies the first condition and the second condition;

[0058] The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length;

[0059] The first length is k*the length of the minimum frequency baseline, where k is a positive integer in the range [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1;

[0060] The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and smallest P-1 frequency baselines, have a redundant distribution number greater than or equal to P.

[0061] In a possible implementation, the value of P is set based on the degree of frequency selective fading.

[0062] In this implementation, when the degree of frequency selective fading is large, a larger P value is set to obtain more redundancy to resist interference; when the degree of frequency selective fading is small, a smaller P value is set to save frequency domain resources.

[0063] In a possible implementation, the value of P is set based on a frequency response amplitude difference.

[0064] In this implementation, the frequency response amplitude difference can reflect the degree of frequency selective fading. The larger the frequency response amplitude difference, the greater the degree of frequency selective fading, and the smaller the frequency response amplitude difference, the smaller the degree of frequency selective fading. The frequency response amplitude difference is easier to obtain.

[0065] In a possible implementation, the frequency response amplitude difference includes at least one of the following: a ratio of a maximum frequency response amplitude to a minimum frequency response amplitude, a ratio of a variance of the frequency response amplitude to a square of a mean frequency response amplitude, and a ratio of a standard deviation of the frequency response amplitude to a mean frequency response amplitude.

[0066] In this implementation, a specific representation of the frequency response amplitude difference is provided to facilitate setting the value of P.

[0067] In a possible implementation, the method further includes:

[0068] The second communication device obtains the perception demand parameter; the second communication device determines the first frequency domain resource, including: the second communication device determines the first frequency domain resource from the frequency domain resource pool according to the perception demand parameter.

[0069] In this possible implementation, a specific implementation of the second communication device determining the first frequency domain resource is provided. The second communication device can obtain a perception requirement parameter and determine the first frequency domain resource based on the perception requirement parameter, thereby meeting the perception requirement and improving perception performance.

[0070] In a possible implementation manner, the second communication device obtains the perception requirement parameter, including: the second communication device receives the perception requirement parameter from a third communication device.

[0071] In this implementation, the sensing requirement parameter may be sent from the third communication device to the second communication device. The third communication device may be understood as a control node that controls the second communication device to send the sensing signal.

[0072] In a possible implementation, the perception requirement parameter includes a ranging unambiguous distance, the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

[0073] In a possible implementation, the sensing requirement parameter includes a ranging resolution, the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0074] In a possible implementation, the perception requirement parameter includes a perception resource occupancy rate, the first frequency domain resource satisfies a maximum number of frequency domain resources N, and the maximum number of frequency domain resources N is determined according to the perception resource occupancy rate.

[0075] In the above possible implementations, multiple possible implementations of the specific content included in the perception demand parameter are provided, as well as requirements that the first frequency domain resource should meet based on these implementations.

[0076] In a possible implementation, the frequency combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination that includes the least number of subcarriers among subcarrier combinations that satisfy P redundancy.

[0077] In this possible implementation, there may be multiple subcarrier combinations that meet the aforementioned P-level redundancy. The subcarrier combination may be the one with the least number of subcarriers among the multiple subcarrier combinations, thereby effectively saving subcarrier overhead in the frequency domain and avoiding occupying excessive communication resources and affecting communication performance.

[0078] In a possible implementation, the first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

[0079] In this possible implementation, frequency domain overhead is saved while satisfying the condition of P-fold redundancy distribution.

[0080] In a possible implementation, the first frequency domain resources include frequency point combinations that meet the first condition and are shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; |b min | is the minimum frequency baseline.

[0081] In one possible implementation, the first frequency domain resources include: {1, 2, ..., N1+P, 2*(N1+1), 2*(N1+1)+1, ..., 2*(N1+1)+P-1, ..., N2*(N1+1), N2*(N1+1)+1, ..., N2*(N1+1)+P-1}*|b min |;|b min | is the minimum frequency baseline, N1 and N2 are positive integers.

[0082] In the above possible implementation manners, the first frequency domain resources can be constructed simply and quickly.

[0083] In one possible implementation, N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |,|b max | is the maximum frequency baseline.

[0084] In one possible implementation, N1, N2, and P satisfy N≥N1+P*N2, where N is the maximum number of frequency domain resources.

[0085] In the above possible implementations, parameter restrictions are given to facilitate reasonable setting of parameter values.

[0086] In one possible implementation, P is the maximum value that satisfies the constraint conditions.

[0087] In this possible implementation, maximum redundancy can be obtained and interference can be avoided to a greater extent.

[0088] In a possible implementation, the method further includes: the second communication device receiving first information from the first communication device, where the first information is used to indicate a frequency domain position of the first frequency domain resource.

[0089] 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, so that the second communication device can receive the perception signal on the frequency domain resource of the first frequency domain resource, thereby achieving perception measurement of the surrounding environment.

[0090] In one possible implementation, the first information includes frequency domain resource construction parameters, which are used to construct the first frequency domain resource; or, the first information includes the frequency domain position of the first frequency domain resource; or, the first information includes a perceptual quality index, which is used to indicate the frequency domain position of the first frequency domain resource.

[0091] In this possible implementation, three specific implementations are provided in which the first information indicates the frequency domain position of the first frequency domain resource. Specifically, the first information can directly indicate the frequency domain position of the first frequency domain resource, and the indication method is simple. Alternatively, the first information indirectly indicates the frequency domain position of the first frequency domain resource by means of an index. This indication method requires fewer indication bits and can save the overhead of the indication bits. Alternatively, the first information indirectly indicates the frequency domain position of the first frequency domain resource by means of a frequency domain resource construction parameter, which can save the overhead of the indication bits and is more flexible.

[0092] In another possible implementation manner, the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0093] In this possible implementation, two possible signalings for carrying the first information are provided, providing a basis for embodiments of the solution.

[0094] In a possible implementation, the method further includes: the second communication device receives a trigger signaling from the first communication device, where the trigger signaling is used to trigger the second communication device to activate a perception function.

[0095] In this possible implementation, a triggering condition for the second communication device to enable the sensing function is provided, providing a basis for an embodiment of the solution.

[0096] In a possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0097] In this implementation, the second communication device can be triggered to enable the perception function through RRC signaling or DCI signaling.

[0098] In a possible implementation, the frequency domain resource pool includes frequency domain resources used for transmitting a channel state information reference signal between the first communication device and the second communication device; or,

[0099] The frequency domain resource pool includes frequency domain resources used for transmitting communication data between the first communication device and the second communication device.

[0100] In this possible implementation, two possible communication resources included in a frequency domain resource pool are provided, which can be used to select a first frequency domain resource, thereby enabling the communication device to perceive the surrounding environment while communicating.

[0101] In a third aspect, an embodiment of the present application provides a wireless communication device, wherein the first communication device includes:

[0102] A processing module, configured to determine a first frequency domain resource, where a frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer;

[0103] The transceiver module is configured to send a perception signal on a first frequency domain resource.

[0104] In one possible implementation, the P-fold redundancy distribution satisfies the first condition and the second condition;

[0105] The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length;

[0106] The first length is k*the length of the minimum frequency baseline, where k is a positive integer in the range [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1;

[0107] The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and smallest P-1 frequency baselines, have a redundant distribution number greater than or equal to P.

[0108] In a possible implementation, the value of P is set based on the degree of frequency selective fading.

[0109] In a possible implementation, the value of P is set based on a frequency response amplitude difference.

[0110] In a possible implementation, the frequency response amplitude difference includes at least one of the following: a ratio of a maximum frequency response amplitude to a minimum frequency response amplitude, a ratio of a variance of the frequency response amplitude to a square of a mean frequency response amplitude, and a ratio of a standard deviation of the frequency response amplitude to a mean frequency response amplitude.

[0111] In one possible implementation, the transceiver module is further configured to:

[0112] Obtaining perception demand parameters;

[0113] The processing module is specifically used to:

[0114] A first frequency domain resource is determined from a frequency domain resource pool according to the perception demand parameter.

[0115] In a possible implementation manner, the transceiver module is specifically configured to receive a perception requirement parameter from a third communication device.

[0116] In a possible implementation, the perception requirement parameter includes a ranging unambiguous distance, the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

[0117] In a possible implementation, the sensing requirement parameter includes a ranging resolution, the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0118] In a possible implementation, the perception requirement parameter includes a perception resource occupancy rate, the first frequency domain resource satisfies a maximum number of frequency domain resources N, and the maximum number of frequency domain resources N is determined according to the perception resource occupancy rate.

[0119] In a possible implementation, the frequency combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination that includes the least number of subcarriers among subcarrier combinations that satisfy P redundancy.

[0120] In a possible implementation, the first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

[0121] In a possible implementation, the first frequency domain resources include frequency point combinations that meet the first condition and are shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; |b min | is the minimum frequency baseline.

[0122] In one possible implementation, the first frequency domain resources include: {1, 2, ..., N1+P, 2*(N1+1), 2*(N1+1)+1, ..., 2*(N1+1)+P-1, ..., N2*(N1+1), N2*(N1+1)+1, ..., N2*(N1+1)+P-1}*|b min |;|b min | is the minimum frequency baseline, N1 and N2 are positive integers.

[0123] In one possible implementation, N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |,|bmax | is the maximum frequency baseline.

[0124] In one possible implementation, N1, N2, and P satisfy N≥N1+P*N2, where N is the maximum number of frequency domain resources.

[0125] In one possible implementation, P is the maximum value that satisfies the constraint conditions.

[0126] In this possible implementation, maximum redundancy can be obtained and interference can be avoided to a greater extent.

[0127] In a possible implementation, the transceiver module is further configured to: send first information to the second communication device, where the first information is used to indicate a frequency domain position of the first frequency domain resource.

[0128] In one possible implementation, the first information includes frequency domain resource construction parameters, which are used to construct the first frequency domain resource; or, the first information includes the frequency domain position of the first frequency domain resource; or, the first information includes a perceptual quality index, which is used to indicate the frequency domain position of the first frequency domain resource.

[0129] In another possible implementation manner, the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0130] In a possible implementation, the transceiver module is further used to: send a trigger signaling to the second communication device, where the trigger signaling is used to trigger the second communication device to activate a perception function.

[0131] In a possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0132] In one possible implementation, the frequency domain resource pool includes frequency domain resources for transmitting channel state information reference signals between the first communication device and the second communication device; or, the frequency domain resource pool includes frequency domain resources for transmitting communication data between the first communication device and the second communication device.

[0133] The beneficial effects of the communication device provided by the third aspect and each possible implementation of the third aspect can be referred to the beneficial effects brought about by the first aspect and each possible implementation of the first aspect, and will not be repeated here.

[0134] In a fourth aspect, an embodiment of the present application provides a wireless communication device, wherein the second communication device includes:

[0135] A processing module, configured to determine a first frequency domain resource, where a frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer;

[0136] The transceiver module is configured to receive a perception signal from a first communication device on a first frequency domain resource.

[0137] In a possible implementation, the processing module is further configured to perform perception measurement on the perception signal to obtain a perception result.

[0138] In one possible implementation, the P-fold redundancy distribution satisfies the first condition and the second condition;

[0139] The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length;

[0140] The first length is k*the length of the minimum frequency baseline, where k is a positive integer in the range [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1;

[0141] The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and smallest P-1 frequency baselines, have a redundant distribution number greater than or equal to P.

[0142] In a possible implementation, the value of P is set based on the degree of frequency selective fading.

[0143] In a possible implementation, the value of P is set based on a frequency response amplitude difference.

[0144] In a possible implementation, the frequency response amplitude difference includes at least one of the following: a ratio of a maximum frequency response amplitude to a minimum frequency response amplitude, a ratio of a variance of the frequency response amplitude to a square of a mean frequency response amplitude, and a ratio of a standard deviation of the frequency response amplitude to a mean frequency response amplitude.

[0145] In one possible implementation, the transceiver module is further configured to:

[0146] Obtaining perception demand parameters;

[0147] The processing module is specifically used to:

[0148] A first frequency domain resource is determined from a frequency domain resource pool according to the perception demand parameter.

[0149] In a possible implementation manner, the transceiver module is specifically configured to receive a perception requirement parameter from a third communication device.

[0150] In a possible implementation, the perception requirement parameter includes a ranging unambiguous distance, the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

[0151] In a possible implementation, the sensing requirement parameter includes a ranging resolution, the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0152] In a possible implementation, the perception requirement parameter includes a perception resource occupancy rate, the first frequency domain resource satisfies a maximum number of frequency domain resources N, and the maximum number of frequency domain resources N is determined according to the perception resource occupancy rate.

[0153] In a possible implementation, the frequency combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination that includes the least number of subcarriers among subcarrier combinations that satisfy P redundancy.

[0154] In a possible implementation, the first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

[0155] In a possible implementation, the first frequency domain resources include frequency point combinations that meet the first condition and are shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; |b min | is the minimum frequency baseline.

[0156] In one possible implementation, the first frequency domain resources include: {1, 2, ..., N1+P, 2*(N1+1), 2*(N1+1)+1, ..., 2*(N1+1)+P-1, ..., N2*(N1+1), N2*(N1+1)+1, ..., N2*(N1+1)+P-1}*|b min |;|b min | is the minimum frequency baseline, N1 and N2 are positive integers.

[0157] In one possible implementation, N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |,|b max | is the maximum frequency baseline.

[0158] In one possible implementation, N1, N2, and P satisfy N≥N1+P*N2, where N is the maximum number of frequency domain resources.

[0159] In one possible implementation, P is the maximum value that satisfies the constraint conditions.

[0160] In this possible implementation, maximum redundancy can be obtained and interference can be avoided to a greater extent.

[0161] In a possible implementation, the transceiver module is further used to: receive first information from the first communication device, where the first information is used to indicate a frequency domain position of the first frequency domain resource.

[0162] In one possible implementation, the first information includes frequency domain resource construction parameters, which are used to construct the first frequency domain resource; or, the first information includes the frequency domain position of the first frequency domain resource; or, the first information includes a perceptual quality index, which is used to indicate the frequency domain position of the first frequency domain resource.

[0163] In another possible implementation manner, the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0164] In a possible implementation, the transceiver module is further used to: receive a trigger signaling sent from the first communication device, where the trigger signaling is used to trigger the second communication device to activate a sensing function.

[0165] In a possible implementation, the type of trigger signaling includes RRC signaling or DCI signaling.

[0166] In one possible implementation, the frequency domain resource pool includes frequency domain resources for transmitting channel state information reference signals between the first communication device and the second communication device; or, the frequency domain resource pool includes frequency domain resources for transmitting communication data between the first communication device and the second communication device.

[0167] The beneficial effects of the communication device provided by the fourth aspect and the possible implementation methods of the fourth aspect can be referred to the beneficial effects brought about by the second aspect and the possible implementation methods of the second aspect, and will not be repeated here.

[0168] In a fifth aspect, an embodiment of the present application provides a communication device, comprising: a processor, configured to execute the method in the first aspect, the second aspect, or each possible implementation manner by running a computer program or through a logic circuit.

[0169] In a possible implementation, the communication device further includes a memory, which is used to store the computer program.

[0170] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0171] In a sixth aspect, an embodiment of the present application provides a communication system, comprising: a first communication device for executing the method in the first aspect or each possible implementation, and a second communication device for executing the method in the second aspect or each possible implementation.

[0172] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer program instructions, which enables a computer to execute the method in the first aspect, the second aspect or each possible embodiment described above.

[0173] In an eighth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the method in the first aspect, the second aspect or each possible implementation manner described above.

[0174] In a ninth aspect, an embodiment of the present application provides a computer program that enables a computer to execute the method in the first aspect, the second aspect, or each possible implementation manner described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0175] FIG1A is a schematic diagram of an application scenario of an embodiment of the present application;

[0176] FIG1B is a schematic diagram of another application scenario of an embodiment of the present application;

[0177] FIG1C is a schematic diagram of another application scenario of an embodiment of the present application;

[0178] FIG1D is a schematic diagram of another application scenario of an embodiment of the present application;

[0179] FIG1E is a schematic diagram of another application scenario of an embodiment of the present application;

[0180] FIG1F is a schematic diagram of another application scenario of an embodiment of the present application;

[0181] FIG2A is a flow chart of a communication method according to an embodiment of the present application;

[0182] FIG2B is a schematic diagram of another application scenario of an embodiment of the present application;

[0183] FIG2C is another schematic flow chart of the communication method according to an embodiment of the present application;

[0184] FIG2D is another schematic flow chart of the communication method according to an embodiment of the present application;

[0185] FIG2E is another schematic flow chart of the communication method according to an embodiment of the present application;

[0186] FIG3 is another schematic flow chart of the communication method according to an embodiment of the present application;

[0187] FIG4 is another schematic flow chart of the communication method according to an embodiment of the present application;

[0188] FIG5 is another schematic flow chart of the communication method according to an embodiment of the present application;

[0189] FIG6A is a schematic diagram of a frequency combination according to an embodiment of the present application;

[0190] FIG6B is a schematic diagram of a frequency baseline and a frequency baseline redundancy formed by frequency point combination according to an embodiment of the present application;

[0191] FIG7A is another schematic diagram of a frequency combination according to an embodiment of the present application;

[0192] FIG7B is another schematic diagram of a frequency baseline and a frequency baseline redundancy formed by frequency point combination according to an embodiment of the present application;

[0193] FIG8 is a schematic structural diagram of a first communication device according to an embodiment of the present application;

[0194] FIG9 is a schematic structural diagram of a second communication device according to an embodiment of the present application;

[0195] FIG10 is another schematic structural diagram of the first communication device according to an embodiment of the present application;

[0196] FIG11 is another schematic structural diagram of a second communication device according to an embodiment of the present application;

[0197] FIG12 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

[0198] FIG13 is a schematic diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0199] The embodiments of the present application provide a communication method and apparatus for enabling a communication device to perceive the surrounding environment while communicating, thereby reducing interference caused by frequency selective fading.

[0200] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0201] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0202] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc. Among them, a, b, c can be single or plural.

[0203] The communication systems to which the technical solutions of the present application are applicable include but are not limited to Long Term Evolution (LTE) systems, or fifth-generation (5G) mobile communication systems, or mobile communication systems after 5G networks (for example, 6G mobile communication systems), or device-to-device (D2D) communication systems, or vehicle-to-everything (V2X) communication systems.

[0204] In an embodiment of the present application, a communication system includes a first communication device. The first communication device transmits a sensing signal while performing communication to sense the surrounding environment.

[0205] In one possible implementation, the first communication device is a communication device with 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 sensing signal is reflected by a sensing target in the surrounding environment to the first communication device, which then receives the sensing signal reflected by the sensing target. In this way, the first communication device can perform sensing measurements on the sensing signal to obtain a sensing result. For example, the first communication device may determine the distance between the sensing target and the first communication device.

[0206] 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 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 a sensing measurement on 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.

[0207] In this implementation, the communication system may optionally further include a third communication device. The third communication device may notify the first communication device to send a sensing signal. The third communication device may notify the second communication device to enable a sensing function.

[0208] In the above two possible implementations, the frequency domain resource pool may include frequency domain resources for communication and frequency domain resources for positioning, which is not specifically limited in this application. The first frequency domain resource is a frequency domain resource selected from the frequency domain resource pool.

[0209] In the embodiment of the present application, the first communication device and the second communication device may be radar equipment, vehicle-mounted equipment, network equipment, terminal equipment, etc. The third communication device is a network device.

[0210] A network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. The network device can be a base station, and the base station includes various forms of macro base stations, micro base stations, relay stations, and access points. Exemplarily, in the embodiment of the present application, the base station can be a base station, a transmission reception point (TRP) or a transmission point (TP) or a next generation Node B (ngNB) in a new radio (NR), or an evolved Node B (eNB or eNodeB) in a long term evolution (LTE) system.

[0211] A terminal device may be a device that provides voice or data connectivity to a user, and is also referred to as user equipment (UE), a mobile station, a subscriber unit, a station, or terminal equipment (TE). A terminal device may be a cellular 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, a vehicle-mounted device, a wearable device, a computing device, or an unmanned aerial vehicle (UAV). 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 other objects through a communication system may be a terminal device in the embodiments of the present application, for example, terminal devices and automobiles in intelligent transportation, household appliances in intelligent homes, power meter reading instruments, voltage monitoring instruments, and environmental monitoring instruments in intelligent grids, video surveillance instruments and cash registers in intelligent security networks, and the like.

[0212] The following are some application scenarios applicable to the embodiments of this application. It should be noted that the following application scenarios are merely examples and do not limit the technical solution of this application. This application is still applicable to other application scenarios.

[0213] Please refer to Figure 1A, which is a schematic diagram of an application scenario of an embodiment of the present application. Figure 1A is a specific example of a situation in which a first communication device in a communication system serves as both a transmitter and a receiver of a perception signal.

[0214] In Figure 1A, the first communication device is network device 1. Network device 1 can select a first frequency domain resource from the frequency domain resources used for communication by network device 1. While network device 1 is communicating, network device 1 transmits a sensing signal on the first frequency domain resource. The sensing signal is reflected by a car (or other sensed object) in the surrounding environment and reaches network device 1. Network device 1 can then perform sensing measurements on the sensing signal and obtain a sensing result. For example, network device 1 can perform sensing measurements on the sensing signal to obtain information such as the distance between network device 1 and the car and the car's speed.

[0215] 1B to 1F , some specific examples of the case where the first communication device is a transmitter of the perception signal and the second communication device is a receiver of the perception signal are described below.

[0216] Please refer to Figure 1B, which is a schematic diagram of another application scenario of an embodiment of the present application. The first communication device is a network device 1, and the second communication device is a terminal device. The terminal device accesses the network device 1. Communication can be performed between the network device 1 and the terminal device. While the network device 1 is communicating with the terminal device, the network device 1 sends a perception signal on a first frequency domain resource. For example, the first frequency domain resource can be determined from the frequency domain resources used to transmit downlink signals between the network device 1 and the terminal device. Then, the perception signal is reflected to the terminal device by the cars in the surrounding environment. The terminal device can perceive the perception signal and obtain a perception result. In this way, the terminal device can perceive the cars in the surrounding environment while communicating.

[0217] Please refer to Figure 1C, which is a schematic diagram of another application scenario of an embodiment of the present application. The first communication device is a terminal device, and the second communication device is a network device 1. The terminal device is connected to the network device 1, and the terminal device and the network device 1 can communicate. While the terminal device is communicating with the network device 1, the terminal device sends a perception signal on the first frequency domain resource. For example, the first frequency domain resource can be determined from the frequency domain resource used to transmit uplink signals between the terminal device and the network device 1. The perception signal is reflected by the cars in the surrounding environment to the network device 1. The network device 1 can perceive the perception signal and obtain a perception result. In this way, the network device 1 can perceive the cars in the surrounding environment while communicating.

[0218] Please refer to Figure 1D, which is a schematic diagram of another application scenario of an embodiment of the present application. The first communication device is network device 1, and the second communication device is base station 2. Network device 1 and base station 2 can communicate with each other. While network device 1 is communicating with base station 2, network device 1 sends a perception signal on a first frequency domain resource. The first frequency domain resource can be determined from the frequency domain resources used for communication between network device 1 and base station 2. The perception signal is reflected by cars in the surrounding environment to base station 2, and network device 2 can perceive the perception signal and obtain a perception result. In this way, base station 2 can perceive cars in the surrounding environment while communicating.

[0219] Please refer to Figure 1E, which is a schematic diagram of another application scenario of an embodiment of the present application. The first communication device is terminal device 1, and the second communication device is terminal device 2. Terminal device 1 can communicate with terminal device 2. While terminal device 1 is communicating with terminal device 2, terminal device 1 can send a perception signal on a first frequency domain resource. For example, the first frequency domain resource can be determined from the frequency domain resources used for communication between terminal device 1 and terminal device 2. The perception signal is reflected by cars in the surrounding environment to terminal device 2. Terminal device 2 perceives the perception signal and obtains a perception result. The application scenario shown in Figure 1E above can be applied to a V2X system or a D2D system.

[0220] Please refer to Figure 1F, which is a schematic diagram of another application scenario of an embodiment of the present application. In Figure 1F, the first communication device is network device 1, the second communication device is network device 2, and the third communication device is base station 3. Network device 1 and network device 2 can communicate with each other. The base station is a control node, which is used to notify network device 1 and network device 2. For example, base station 3 can trigger network device 1 to send a perception signal, and trigger network device 2 to turn on the perception function. Network device 1 can send a perception signal on a first frequency domain resource. The first frequency domain resource can be determined from the frequency domain resources used for communication between network device 1 and network device 2. The perception signal is reflected by the cars in the surrounding environment to network device 2, and network device 2 can perceive the perception signal and obtain a perception result. In this way, network device 2 can perceive the surrounding environment while communicating.

[0221] The following is an introduction to some technical terms involved in this application.

[0222] 1. Frequency baseline: The frequency of one frequency point minus the frequency of another frequency point. The frequency baseline has direction and magnitude. For a frequency of f i and f j For two frequency points, the two frequency points can form a pair of frequency baselines, namely frequency baseline b ij =f i -f j and frequency baseline b ij =f j -f i .

[0223] 2. Frequency baseline redundancy: There are multiple identical frequency baselines in the frequency domain resources, which is called frequency baseline redundancy. For example, as shown in Figure 6A, the frequencies of the subcarriers included in the subcarrier combination are f0, f1, f2, f3, f4, f5, and f6 respectively. The subcarriers included in the subcarrier combination are sorted from small to large in frequency. The frequency intervals between adjacent subcarriers are the same, that is, the subcarriers included in the subcarrier combination are evenly distributed in the frequency domain. The frequency baseline b can be formed by f1 and f2. 21 =f2-f1, f2 and f3 can form the frequency baseline b 32 =f3-f2. Since the subcarriers are evenly distributed, f2-f1=f3-f2, that is, the frequency baseline b 21 and frequency baseline b 32 If the frequency baselines are the same, then the frequency baselines are said to be redundant.

[0224] The technical solution of this application is described below in conjunction with specific embodiments. In the following embodiments, the application scenarios of Figures 1B to 1E may be applied; when the first communication device and the second communication device are the same communication device, the application scenario of Figure 1A may be applied; in some embodiments, the application scenario of Figure 1F may also be applied.

[0225] Please refer to FIG2A, which is a schematic diagram of another embodiment of the communication method of the present application. In FIG2A, the communication method includes:

[0226] 201. A first communication device determines a first frequency domain resource.

[0227] The first frequency domain resource satisfies a frequency baseline P-redundancy distribution, where P is a positive integer.

[0228] The P-fold redundancy distribution satisfies the first and second conditions.

[0229] 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 can be determined from the frequency domain resources used for communication and / or the frequency domain resources used for positioning.

[0230] Optionally, the frequency domain resource pool includes frequency domain resources for transmitting a channel state information (CSI) reference signal between the first communication device and the second communication device; or, the frequency domain resource pool includes frequency domain resources for transmitting communication data between the first communication device and the second communication device. In other words, the first frequency domain resource of the present application may be a frequency domain resource determined in the frequency domain resources for transmitting CSI and / or the frequency domain resources for transmitting communication data of the first communication device.

[0231] Optionally, the first frequency domain resource includes a frequency point combination or a frequency band combination.

[0232] A frequency point combination includes one or more frequency points, and a frequency band combination includes one or more frequency bands.

[0233] For example, the 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.

[0234] For example, the frequency band combination includes a frequency band between frequency f0 and frequency f6.

[0235] The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length. The first length is k*the length of the minimum frequency baseline, where k is a positive integer in the range [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than 1.

[0236] For example, a frequency combination includes frequencies 0, 1, 4, and 6. This frequency combination forms the frequency baseline with the shortest length at 1 and the longest at 6. The ratio of the length of the longest frequency baseline to the length of the shortest frequency baseline is 6. Frequency baselines constructed using this frequency combination include those with frequencies of -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and 6. This frequency combination satisfies the frequency baseline coverage completeness requirement.

[0237] The length of the maximum frequency baseline is |b max |, the length of the minimum frequency baseline is |b min |. It can be seen that K=|b max | / |b min |. If the length is k|b min If all frequency baselines can be constructed using the frequencies included in a frequency combination, the resulting frequency baseline provides complete frequency coverage, ensuring the integrity of the frequency baseline coverage. When a frequency combination forms multiple frequency baselines of varying lengths, it can achieve ranging for multiple targets in the surrounding environment. The more frequency baselines of varying lengths, the better the ranging performance.

[0238] For example, when the frequency combination can only form a single frequency baseline d1, the following relationship is obtained: y1 = f(d1, τ1). Here, d1 represents the frequency baseline, τ1 is the time delay, y1 is the measurement result corresponding to frequency baseline d1, and f is the mapping relationship from frequency baseline d1 to time delay τ1 to obtain y1. Time delay τ1 is unknown. That is, one equation corresponds to one unknown. Time delay τ1 can be understood as the time delay between the perceived signals at the two frequency points that constitute frequency baseline d1, reaching target point 1, and then being reflected.

[0239] However, when both delay τ1 and delay τ2 exist, the following relationship is obtained: y1 = f1(d1, τ1, τ2). Delay τ1 and delay τ2 are unknown, so one equation corresponds to two unknowns and cannot be solved. Delay τ2 can be understood as the time delay between the perception signal at the two frequency points that constitute frequency baseline d2 and the reflection of target point 2. However, if this frequency combination can also form another frequency baseline d2, then another equation, y2 = f2(d2, τ1, τ2), can be obtained. In this way, frequency baselines d1 and d2 correspond to two equations, respectively, and the two unknowns, delay τ1 and delay τ2, can be solved. Then, combining delay τ1 and delay τ2 can determine the location information of target points 1 and 2. Therefore, if the frequency baseline formed by the frequency combination has complete frequency coverage, it can achieve perception and ranging of multiple target points in the surrounding environment.

[0240] Complete baseline coverage reduces the sidelobe level of the ranging ambiguity function, thereby reducing the impact of interference. Incomplete baseline coverage results in higher sidelobe levels, which can cause the sidelobes of stronger targets to obscure weaker targets. The more incomplete the baseline coverage, the greater the interference.

[0241] In an actual channel environment, frequency-selective fading of the channel is inevitable, resulting in a poor signal-to-noise ratio for the baseline measurement value composed of this frequency. In extreme cases, it may even be lower than the noise floor level, resulting in an invalid measurement value that cannot meet effective complete baseline coverage and causes interference.

[0242] For example, as shown in FIG7A , the frequencies of the subcarriers included in the subcarrier combination are f0, f1, f4, and f6, and f0, f1, f4, and f6 are 0, 1, 4, and 6, respectively. The first communication device uses the subcarriers included in the subcarrier combination to perform sensing ranging. The length of the minimum frequency baseline in the frequency baseline formed by the subcarriers included in the subcarrier combination |b min | is 1, maximum frequency baseline |b max | is 6. FIG7B shows that the coverage of the frequency baseline and the redundancy of the frequency baseline can be determined by the subcarrier combination. As shown in FIG7B, a length of k|b can be constructed by the subcarrier combination. minFrequency baselines, k, belong to [-6, –5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6]. Therefore, the frequency baseline coverage is complete. Figure 7B shows that redundancy exists only on frequency baseline 0; no other frequency baselines are redundant. For example, when f4 appears at a location with frequency-selective fading, the length-2 frequency baseline formed by f4 and f6 is invalid, and the length-2 frequency baseline is missing from the measured frequency baseline distribution.

[0243] To overcome this problem, the frequency baseline redundancy can be increased. The receiver of the sensing signal obtains the same information from the redundant frequency baselines. Therefore, even if frequency-selective fading occurs at certain frequencies, rendering the frequency baseline measurement invalid, other frequencies can be used to construct the frequency baseline, reducing the possibility of missing frequency baselines. Furthermore, the measurement noise between redundant baselines is independent of each other. Redundant averaging of the redundant baselines can improve the measurement signal-to-noise ratio (SNR). The greater the redundancy, the greater the improvement. For example, in the above example, if subcarrier f3 with frequency 3 is added, the length of the frequency baseline formed by f3 and f1 is also 2, indicating that the length-2 frequency baseline is redundant. When f4 appears at a location with frequency-selective fading, the length-2 frequency baseline measurement formed by f4 and f6 is invalid. However, the length-2 frequency baseline measurement formed by f3 and f1 is unaffected and remains valid, resulting in a frequency baseline of length 2 still existing in the measured frequency baseline distribution.

[0244] Since frequency selective fading is random, all frequencies may fade, so all frequencies need redundancy. When multiple frequencies fade, multiple redundancies are required.

[0245] Therefore, the second condition must also be met. The second condition includes: except for the largest P-1 and smallest P-1 frequency baselines, the number of redundant distributions of all frequency baselines is greater than or equal to P.

[0246] Optionally, the maximum number of redundant P-1 frequency baselines is p, where p is the number of the frequency baselines sorted from large to small. For example, the maximum frequency baseline corresponds to a redundant number of 1, the second-largest frequency baseline corresponds to a redundant number of 2, and so on. Similarly, the minimum number of redundant P-1 frequency baselines is q, where q is the number of the frequency baselines sorted from small to large. It can be understood that among all possible frequency baseline distributions, the maximum number of redundant P-1 frequency baselines is at most p. For example, the maximum frequency baseline can only be obtained by subtracting the minimum frequency point from the maximum frequency point, and the maximum number of redundant frequency baselines is 1.

[0247] It can be understood that when P is equal to 1, the second condition is that the number of times all frequency baselines are redundantly distributed is greater than or equal to 1, which is equivalent to no redundancy, that is, only the first condition needs to be met.

[0248] When P-fold redundancy distribution is satisfied, complete baseline coverage can be guaranteed even if P-1 frequency points fail. Because it's difficult to accurately predict how many frequency points will fade, a larger P value reduces the likelihood of interference, but increases overhead. The P value can be set based on the degree of frequency-selective fading or derived from other constraints. The greater the difference in frequency response amplitude, the greater the degree of frequency fading. The P value can be set based on the frequency response amplitude. The frequency response amplitude can be obtained from CSI or by testing the sensing signal on the frequency domain in the frequency domain resource pool.

[0249] The first frequency domain resource may be determined from a frequency domain resource pool according to a perception demand parameter.

[0250] In this embodiment, the sensing requirement parameter is used by the first communication device or the second communication device to perform sensing measurement using the sensing signal. For example, the sensing requirement parameter may represent a requirement for performing sensing ranging using the sensing signal.

[0251] The perception requirement parameters may include at least one of the following: ranging unambiguous distance, ranging resolution, and perception resource occupancy rate.

[0252] Specifically, the above-mentioned ranging unambiguous distance and ranging resolution represent the requirements for perceptual ranging through perceptual signals.

[0253] In this embodiment, the ranging resolution refers to the minimum distance that can distinguish two identical target points.

[0254] The two identical target points may refer to two target points having the same size, volume, material, etc.

[0255] The smaller the ranging resolution, the smaller the minimum distance at which the first communication device is required to distinguish two identical target points. In other words, the smaller the ranging resolution, the higher the required perception accuracy.

[0256] For example, as shown in Figure 2B, the terminal device sends a perception signal on the first frequency domain resource. The perception signal is reflected by target point 1 and target point 2 to network device 1 respectively. The sum of the distance from the terminal device to target point 1 plus 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 plus the distance from target point 2 to network device 1 is r3+r4. The ranging resolution is △r. If |(r3+r4)-(r1+r2)| is greater than or equal to △r, network device 1 can distinguish target point 1 from target point 2. If |(r3+r4)-(r1+r2)| is less than △r, network device 1 may not be able to distinguish target point 1 from target point 2, and network device 1 will think that there is only one target point.

[0257] It should be noted that the ranging resolution is proportional to the bandwidth of the sensing signal. The larger the bandwidth of the sensing signal, the higher the ranging resolution.

[0258] In this embodiment, optionally, for the case where the first communication device serves as the transmitter and receiver of the perception signal, the ranging unambiguous distance represents the following requirement: the distance from any point within the perception area to the first communication device multiplied by two is less than the ranging unambiguous distance, and the distance from any point on the edge of the perception area to the first communication device multiplied by two is equal to the ranging unambiguous distance.

[0259] For example, as shown in FIG1A , the sensing area is the circular area shown in FIG1A , and the network device 1 is the center of the circle. The unambiguous distance of the ranging is r max The distance from any point on the circle to network device 1 is twice the distance equal to the unambiguous distance r. max The car is located in the circular area, and the distance from network device 1 to the car is R1. For the car in the circular area in Figure 1A, the value obtained by multiplying the distance R1 from network device 1 to the car by 2 is less than r max For the target point on the circle in FIG1A , the distance from the target point to the network device 1 is R2, and the value obtained by multiplying the distance R2 between the target point and the network device 1 by 2 is equal to r max .

[0260] In this embodiment, optionally, for the case where the first communication device serves as the transmitter of the perception signal and the second communication device serves as the receiver of the perception signal, the ranging unambiguous distance represents the following requirements: the sum of the distance from any point within the perception area to the first communication device and the distance to the second communication device is less than the ranging unambiguous distance; and the sum of the distance from any point on the edge of the perception area to the first communication device and the distance to the second communication device is equal to the ranging unambiguous distance.

[0261] For example, as shown in FIG2B , the sensing area is the elliptical area shown in FIG2B , and the network device 1 and the terminal device are the two foci of the ellipse. The unambiguous distance of the ranging is r max The sum of the distance from any point on the ellipse to network device 1 and the distance to the terminal device is equal to the unambiguous distance r max Target point 1 and target point 2 are located within the ellipse, and target point 3 is located on the ellipse. The terminal device sends a sensing signal on the first frequency domain resource. The sensing signal is reflected by target point 1 and target point 2 to network device 1. For target point 1 located within the ellipse, the sum of the distance from the terminal device to target point 1 plus the distance from target point 1 to network device 1 is r1+r2, and r1+r2 is less than r max For the target point 3 on the ellipse, the sum of the distance from the terminal device to the target point 3 plus the distance from the target point 3 to the network device 1 is r5+r6, and r5+r6 is equal to rmax .

[0262] The first frequency domain resource is introduced below in conjunction with the specific contents included in the perception demand parameters.

[0263] In a first possible implementation manner, the perception requirement parameter includes a ranging unambiguous distance, the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

[0264] First, we take the first frequency domain resource including the frequency point combination as an example for introduction. The unambiguous distance of ranging is r max , so the minimum frequency baseline threshold is c is the speed of light under standard atmospheric conditions. If a frequency baseline formed by a frequency combination includes a frequency baseline with a length less than or equal to |bmin_thresh|, then the frequency combination is considered to meet the minimum frequency baseline threshold.

[0265] For example, a frequency combination includes frequency 0, frequency 2, frequency 4, and frequency 6. The frequencies in the frequency combination are arranged in ascending order of frequency. Frequency 0 has a frequency of f0, frequency 2 has a frequency of f2, frequency 4 has a frequency of f4, and frequency 6 has a frequency of f6.

[0266] The unambiguous distance of the distance measurement is r max , so the minimum frequency baseline threshold is In the frequency baseline composed of two different frequency points in the frequency point combination, the length of the frequency baseline composed of frequency point 0 and frequency point 2 is |f0-f2|, and |f0-f2| is equal to |bmin_thresh|. It can be understood that this frequency point combination meets the minimum frequency baseline threshold.

[0267] From the perspective of a single device independently using frequency resources, a frequency baseline composed of a frequency combination with a length less than or equal to |bmin_thresh| can also meet the minimum frequency baseline threshold requirement, but this may result in wasted frequency resources. Therefore, as long as the smallest frequency baseline in the frequency combination has a length of |bmin_thresh|, the minimum frequency baseline threshold requirement can be met and frequency resources can be avoided.

[0268] From the perspective of multiple devices sharing frequency resources, the frequencies included in the frequency combination can be selected taking into account the frequency reuse rate, thereby improving resource utilization and saving frequency resources.

[0269] For example, if device 1 determines the frequency combination of frequency 0 and frequency 1, the frequency of frequency 0 is f0, the frequency of frequency 1 is f1, and |f0-f1| equals the minimum frequency baseline threshold required by device 1. If |f0-f1| is less than the minimum frequency baseline threshold required by device 2, device 2 can select frequency 0 and frequency 1. This improves the frequency resource utilization of frequency 0 and frequency 1, thereby saving frequency resources.

[0270] For example, the unambiguous distance r max =100m, then according to the formula It can be determined that the minimum required frequency baseline length is 3 MHz. The frequency domain resource pool includes a 3.5 GHz frequency band, which is expressed as {f(a)|f(a)=3.5*10 9 +a*15*10 3 ,0≤a≤1000}, the unit of f(a) is Hertz (Hz). Then, the minimum frequency is 3.5GHz and the maximum frequency is 3.515GHz. Other frequencies are selected from f(a) at intervals of 15KHz to obtain frequency combination 1. Then, frequencies are selected from frequency combination 1 to obtain frequency combination 2. Frequency combination 2 is specifically expressed as {f(m)|f(m)=3.5*10 9 +m*15*10 3 , m = 0, 200, 400, 600, 800, 1000}. The unit of f(m) is Hertz (Hz). Frequency combination 2 is used as the first frequency domain resource. In frequency combination 2, the frequency baseline formed by the two different frequency points, 3.5 GHz and 3.503 GHz, has a length of 3 MHz. Therefore, it can be understood that frequency combination 2 meets the minimum frequency baseline.

[0271] In a second possible implementation manner, the perception requirement parameter includes ranging resolution, the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0272] First, we take the first frequency domain resource including the frequency combination as an example. The ranging resolution is △r, so we know that the maximum frequency baseline threshold is c is the speed of light under standard atmospheric conditions. If a frequency baseline formed by a frequency combination includes a frequency baseline with a length greater than or equal to |bmax_thresh|, then the frequency combination is considered to meet the maximum frequency baseline threshold.

[0273] For example, a frequency combination includes frequency 0, frequency 2, frequency 4, and frequency 6. The frequencies in the frequency combination are arranged in ascending order of frequency. Frequency 0 has a frequency of f0, frequency 2 has a frequency of f2, frequency 4 has a frequency of f4, and frequency 6 has a frequency of f6.

[0274] The ranging resolution is △r, so the maximum frequency baseline threshold is In the frequency baselines of two different frequency point combinations in the frequency point combination, the length of the frequency baseline composed of frequency point 0 and frequency point 6 is |f0-f6|, and |f0-f6| is equal to |bmax_thresh|. It can be understood that this frequency point combination meets the maximum frequency baseline threshold.

[0275] From the perspective of a single device independently using frequency resources, a frequency combination consisting of a frequency baseline with a length greater than or equal to |bmax_thresh| can meet the aforementioned maximum frequency baseline threshold requirement, but this may result in waste of frequency resources. Therefore, as long as the longest frequency baseline in the frequency combination is of length |bmax_thresh|, the maximum frequency baseline threshold requirement can be met and frequency resources can be avoided.

[0276] From the perspective of multiple devices sharing frequency resources, the frequency reuse rate should be considered when selecting the frequencies included in a frequency combination, thereby improving resource utilization and conserving frequency resources. For example, if device 1 determines a frequency combination that includes frequency 0, frequency 2, frequency 4, and frequency 7, the frequencies in the frequency combination are arranged in ascending order of frequency. |f0-f7| equals the maximum frequency baseline threshold required by device 1. |f0-f7| is greater than the maximum frequency baseline threshold required by device 2. Device 1 determines that the frequency combination meets the maximum frequency baseline threshold required by device 1. Device 2 can then select frequency 0, frequency 2, frequency 4, and frequency 7. This improves frequency resource utilization for frequency 0, frequency 2, frequency 4, and frequency 7, thereby conserving frequency resources.

[0277] For example, if the ranging resolution is △r = 10 meters (m), then according to the formula It can be determined that the maximum frequency baseline threshold is required to be 30MHz. The frequency domain resource pool includes the 3.5GHz frequency band, which is expressed as {f(i)|f(i)=3.5*10 9 +i*15*10 3 ,0≤i≤2000}, the unit of f(i) is Hz. Then, the minimum frequency is 3.5GHz and the maximum frequency is 3.53GHz. Other frequencies are selected from f(i) at intervals of 15kHz to obtain frequency combination 3. Then, frequencies are selected from frequency combination 3 to obtain frequency combination 4. Frequency combination 4 is specifically expressed as {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 Hz. In frequency combination 4, the frequency baseline formed by the two different frequency points, 3.5 GHz and 3.53 GHz, has a length of 30 MHz. Therefore, this frequency combination 4 meets the maximum frequency baseline threshold.

[0278] The following takes the first frequency domain resource including the frequency band combination as an example for introduction. The frequency band combination includes one or more frequency bands. The ranging resolution is △r, so it can be known that the maximum frequency baseline threshold is c is the speed of light under standard atmospheric conditions. If the length of the frequency baseline formed by the frequency bands included in the frequency combination includes a frequency baseline greater than or equal to |bmax_thresh|, then the frequency combination can be considered to meet the maximum frequency baseline threshold.

[0279] For example, a frequency band combination includes a frequency band from f0 to f3 and a frequency band from f6 to f9. f0 is greater than f3, f3 is greater than f6, and f6 is greater than f9. If the minimum frequency is f0 and the maximum frequency is f9, then the length of the longest frequency baseline among the frequency baselines formed by the frequency bands included in the frequency band combination is |f0-f9|. If |f0-f9| is greater than or equal to |bmax_thresh|, the frequency band combination is considered to meet the maximum frequency baseline threshold.

[0280] In a third possible implementation manner, the perception requirement parameters include ranging unambiguous distance and ranging resolution, and the first frequency domain resource meets a minimum frequency baseline threshold and a maximum frequency baseline threshold.

[0281] The minimum frequency baseline threshold is determined according to the unambiguous distance of the ranging, and the maximum frequency baseline threshold is determined according to the ranging resolution.

[0282] Here we take the first frequency domain resource including the frequency combination as an example to introduce the unambiguous distance r max , the ranging resolution is △r. Therefore, the minimum frequency baseline threshold is The maximum frequency baseline threshold is The frequency baseline formed by the frequency combination should include a frequency baseline with a length less than or equal to |bmin_thresh| and a frequency baseline with a length greater than or equal to |bmax_thresh|. Then it can be considered that the frequency point combination meets the maximum frequency baseline threshold and the minimum frequency baseline threshold.

[0283] For example, a frequency combination includes frequency 0, frequency 2, frequency 4, and frequency 6. The frequencies in the frequency combination are arranged in ascending order of frequency. Frequency 0 has a frequency of f0, frequency 2 has a frequency of f2, frequency 4 has a frequency of f4, and frequency 6 has a frequency of f6.

[0284] In the frequency baselines of two different frequency combinations, the length of the frequency baseline formed by frequency points 0 and 2 is |f0-f2|. The length of the frequency baseline formed by frequency points 0 and 6 is |f0-f6|. If |f0-f2| is less than or equal to |bmin_thresh|, then it can be understood that this frequency combination meets the minimum frequency baseline threshold. If |f0-f6| is greater than or equal to |bmax_thresh|, then it can be understood that this frequency combination meets the maximum frequency baseline threshold. In other words, this frequency combination meets both the minimum frequency baseline threshold and the maximum frequency baseline threshold.

[0285] For example, the unambiguous distance r max =100m, then according to the formula It can be determined that the minimum frequency baseline threshold is 3MHz. The ranging resolution is △r=10m, then according to the formula It can be determined that the maximum frequency baseline threshold is required to be 30 MHz. The frequency domain resource pool includes a 3.5 gigahertz (GHz) frequency band, which is expressed as {f(i)|f(i)=3.5*10 9 +i*15*10 3 ,0≤i≤2000}, the unit of f(i) is Hz. Then, the minimum frequency is 3.5GHz and the maximum frequency is 3.53GHz. Other frequencies are selected from f(i) at intervals of 15kHz to obtain frequency combination 5. Then, frequencies are selected from frequency combination 5 to obtain frequency combination 6. Frequency combination 6 is specifically expressed as {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 Hz. In frequency combination 6, the frequency baseline formed by the two different frequency points, 3.5 GHz and 3.503 GHz, has a length of 3 MHz. Therefore, this frequency combination 6 meets the minimum frequency baseline threshold. The frequency baseline formed by the frequency points 3.5 GHz and 3.53 GHz has a length of 30 MHz. Therefore, this frequency combination 6 meets the maximum frequency baseline threshold. In other words, this frequency combination 6 meets both the minimum and maximum frequency baseline thresholds.

[0286] In a fourth possible implementation, the sensing requirement parameter includes a sensing resource occupancy rate, and the first frequency domain resource satisfies a maximum number of frequency domain resources N. The maximum number of frequency domain resources is determined based on the sensing resource occupancy rate. The maximum number of frequency domain resources available for sensing, M = γN, is calculated based on the sensing resource occupancy rate γ and the total number of available frequency domain resources N. The total number of available frequency domain resources N can be obtained or determined independently by the second communication device or the third communication device.

[0287] It is understandable that when the sensing requirement parameter does not include the sensing resource occupancy rate, it is equivalent to the default sensing resource occupancy rate being 100%, that is, the maximum number of frequency domain resources M available for sensing is equal to the total number of available frequency domain resources N.

[0288] It can be understood that the fourth possible implementation manner may be combined with the first three possible implementation manners, and the sensing requirement parameters may include sensing resource occupancy rate and ranging unambiguous distance and / or ranging resolution.

[0289] In this embodiment, optionally, the first frequency domain resource includes a frequency combination. The frequency combination includes a subcarrier combination. The subcarrier combination is a subcarrier combination with the least number of subcarriers among the subcarrier combinations that meet the minimum frequency baseline, the maximum frequency baseline, and the first condition.

[0290] Specifically, there may be multiple subcarrier combinations that meet the minimum frequency baseline, maximum frequency baseline, and first condition. The subcarrier combination may be the one with the fewest subcarriers among the multiple subcarrier combinations. In this way, while meeting the maximum and minimum frequency baselines and ensuring complete frequency baseline coverage, the subcarrier combination with the fewest subcarriers is selected, effectively saving subcarrier overhead in the frequency domain. This avoids occupying excessive communication resources and impacting communication performance.

[0291] The following describes four implementations for constructing first frequency domain resources that satisfy a P-fold redundant distribution. For ease of presentation, the first frequency domain resources are normalized, with the minimum frequency baseline length as a unit length of 1. It is understood that this step does not constitute a limitation of this application, and normalization can be omitted. In the following steps, multiplying the frequency by the minimum frequency baseline length achieves the same effect.

[0292] In a first possible implementation, the first frequency domain resource set is 1, 2, ..., N1, consisting of N1 frequency domain resources, with an interval of 1 between frequency domain resources. The second frequency domain resource set is N1+1, 2*(N1+1), ..., N2*(N1+1), consisting of N2 frequency domain resources, with an interval of N1+1 between frequency domain resources. The union of the first and second frequency domain resource sets constitutes a third frequency domain resource set, which satisfies the first condition described above.

[0293] Specifically, the minimum frequency baseline length of the third frequency domain resource set is 1, K is N2*(N1+1)-1, and the first length is 1, 2, 3, ..., N2*(N1+1)-1. Among them, the frequency baseline lengths 1, 2, 3, ..., N1 can be obtained from the frequency points (N1+1)-(N1), (N1+1)-(N1-1), (N1+1)-(N1-2), ..., (N1+1)-(1), and the frequency baseline lengths N1+1, ..., 2*(N1+1)-1 can be obtained from the frequency points (2*(N1+1))-(N1+1), (2*(N1+1))-(N1), (2*(N1+1))-(N1-1), ..., (2*(N1+1))-(1). Similarly, the first length can be constructed from the frequency points of the third frequency domain resource set. It can be understood that this frequency combination meets the requirements of frequency baseline coverage integrity.

[0294] The third frequency domain resource set is shifted by 0, 1, 2, ..., P-1 units respectively and the union is taken to obtain the first frequency domain resource, where P is a positive integer. Shifting by p units means adding p to each frequency point in the set. For example, if the third frequency domain resource set is {1, 4, 6}, shifting by 2 units will result in {3, 6, 8}. It can be understood that in the first frequency domain resource, the frequency points added after the first frequency domain resource set is shifted are included in the frequency points after the second frequency domain resource set is shifted. Therefore, the second frequency domain resource set can also be shifted by 0, 1, 2, ..., P-1 units respectively and the union is taken together with the first frequency domain resource set, and the result obtained is the same. The first frequency domain resource can also be directly expressed as 1, 2,…, N1+P, 2*(N1+1), 2*(N1+1)+1,…, 2*(N1+1)+P-1,…, N2*(N1+1), N2*(N1+1)+1,…, N2*(N1+1)+P-1.

[0295] It can be understood that the first frequency domain resource satisfies a P-fold redundancy distribution. Specifically, since the third frequency domain resource set satisfies complete frequency baseline coverage, that is, satisfies a 1-fold redundancy distribution, the frequency baselines formed by the set obtained after the third frequency domain resource set is shifted are the same, and also satisfy complete frequency baseline coverage and a 1-fold redundancy distribution. The first frequency domain resource is obtained by shifting and taking the union of the third frequency domain resource set. The frequency baseline value range formed by the first frequency domain resource is the same as the frequency baseline formed by the third frequency domain resource set, except for the addition of the maximum and minimum P-1 frequency baselines. In the first frequency domain resource, there are at least P frequency baselines in addition to the maximum and minimum P-1 frequency baselines. In addition, since the maximum and minimum P-1 frequency point intervals of the first frequency domain resource are 1, the number of redundancies of the maximum P-1 frequency baselines is p, where p is the number of the frequency baselines sorted from large to small, and the number of redundancies of the minimum P-1 frequency baselines is q, where q is the number of the frequency baselines sorted from small to large. Therefore, the first frequency domain resource satisfies a P-fold redundancy distribution.

[0296] When P is equal to 1, since the third frequency domain resource set satisfies complete coverage of the frequency baseline, that is, satisfies single-fold redundant distribution, a shift of 0 (that is, no shift) can meet the requirement.

[0297] It is understandable that when P>=N1+1, the third frequency resource set after the shift cannot meet the P-fold redundancy distribution condition due to mutual overlap, so P <N1+1。

[0298] It can be understood that the number of frequency points included in the first frequency domain resource is N1+P*N2.

[0299] Based on the minimum frequency baseline |b min |, maximum frequency baseline|b max | and the maximum number of frequency domain resources determine the parameters N1, N2 and P of the first frequency domain resource. Specifically, the normalized maximum frequency baseline of the first frequency domain resource is N2*(N1+1)+P-1, which should satisfy N2*(N1+1)+P-1≥|b max | / |b min The total number of available frequency domain resources is N, and the number of frequency domain resources included in the first frequency domain resource is N1+P*N2, which should satisfy N≥N1+P*N2.

[0300] Optionally, the perception requirement parameter also includes a perception resource occupancy rate γ. The maximum number of frequency domain resources available for perception, M = γN, is calculated based on the perception resource occupancy rate and the total number of available frequency domain resources N. The total number of available frequency domain resources N can be obtained or determined independently by the second communication device or the third communication device. The number of frequency domain resources included in the first frequency domain resource is N1 + P*N2, which should satisfy M ≥ N1 + P*N2.

[0301] Optionally, when the above conditions are met, the maximum P value is selected to achieve more redundancy times.

[0302] Optionally, the P value is determined based on channel conditions. N1 and N2 are determined based on the P value and the above conditions. When channel conditions are good, frequency selective fading is less, and a smaller P value can be selected to ensure complete frequency baseline coverage with a high probability. When channel conditions are poor, frequency selective fading is more frequent, and a larger P value can be selected to ensure complete frequency baseline coverage with a high probability.

[0303] For example, for a 5G NR signal in the FR1 frequency band, the maximum total available bandwidth is approximately 100 MHz. For example, if the subcarrier spacing is 30 kHz, the maximum available bandwidth is 98.28 MHz, the total number of subcarriers is 3276, and the number of subcarriers available for sensing is no more than 60, i.e., the total number of available frequency domain resources N = 60. max =390m, then according to the formula It can be determined that the minimum frequency baseline threshold is 769.2K Hz. The ranging resolution is △r=3.1m, then according to the formula It can be determined that the maximum frequency baseline threshold is 96.8MHz. Set the maximum baseline length and minimum baseline length to integer multiples of the subcarrier spacing. The maximum baseline length should be greater than the maximum baseline length threshold. in Indicates that the number a is rounded up; the minimum baseline length should be less than the minimum baseline length threshold. in Indicates that a is rounded down. The maximum baseline length should be an integer multiple of the minimum baseline length, so the maximum baseline length is further adjusted to Get the subcarrier set based on the minimum baseline length and the maximum baseline length Determine the set of perceived subcarriers After that, we further design a multiple redundant structure based on the nested approach and determine the parameters N1, N2 and P. It is necessary to satisfy N2(N1+1)+P≥|b max | / |b min | = 130 and N1 + PN2 ≤ N = 60, optimizing the design to maximize the P value. This optimization achieves a maximum P value of 4, with three possible values ​​corresponding to P = 4: N1 = 13, N2 = 9, P = 4; N1 = 17, N2 = 7, P = 4; and N1 = 20, N2 = 6, P = 4. Under the given conditions, a four-fold redundant frequency baseline distribution can be obtained. Even when up to three frequency points experience severe fading and cannot obtain valid measurements, complete frequency baseline coverage is still guaranteed.

[0304] For example, for a 5G NR signal with a frequency band of FR2, the maximum total available bandwidth is approximately 400 MHz. For example, if the subcarrier spacing is 120 kHz, the maximum available bandwidth is 399.96 MHz, the total number of subcarriers is 3333, and the number of subcarriers available for sensing is no more than 150, that is, the total number of available frequency domain resources N = 150. max =390m, then according to the formula It can be determined that the minimum frequency baseline threshold is 769.2K Hz. The ranging resolution is △r=0.8m, then according to the formula It can be determined that the maximum frequency baseline threshold is 375MHz. Set the maximum baseline length and minimum baseline length to integer multiples of the subcarrier spacing. The maximum baseline length should be greater than the maximum baseline length threshold. in Denote the operation of rounding up the number a; the minimum baseline length should be less than the minimum baseline length threshold, take where Denote the operation of rounding down a. The maximum baseline length should be an integer multiple of the minimum baseline length. Therefore, further adjust the maximum baseline length to Obtain the subcarrier set according to the minimum baseline length and the maximum baseline length Determine the perceived subcarrier set After that, further design a multiple redundant structure based on a nested manner, and determine the parameters N1, N2, and P. It is necessary to satisfy N2(N1 + 1)+P≥|b max | / |b min | = 522 and N1+PN2≤N = 150, and optimize to design a maximum value of P. After optimization, the maximum value of P can be taken as 11, N1 = 72, N2 = 7, P = 11. Under the given conditions, an 11-fold redundant frequency baseline distribution can be obtained. When severe fading occurs at up to 10 frequency points and effective measurement values cannot be obtained, the complete coverage of the frequency baseline can still be ensured

[0305] In the second possible implementation method, translate based on the complete baseline coverage scheme. The specific method is as follows

[0306] F is a frequency set that satisfies the sensing requirement parameters and the first condition

[0307] Translate the frequency set F by p, denoted as F p . Translate the set F by 1, 2,..., P - 1 respectively to obtain F1, F2,..., F P-1 , and take the union of all sets to obtain where F0 represents no translation, F0 = F. F′ satisfies P-fold redundancy

[0308] In the third possible implementation method, construct a uniformly distributed frequency domain resource set. Specifically, select the frequency domain resource set S = [1, 2,.., K + 1] according to the maximum frequency baseline length K, that is, the frequency domain resource S is uniformly distributed, and its maximum frequency baseline length is K. At this time, the relationship between the baseline redundancy times and the baseline length is p k +|b k | = K + 1, where p k represents the redundancy times of the kth frequency baseline, and |b k | represents the length of the kth frequency baseline. That is, S satisfies (K + 1)-fold redundancy, and satisfies P-fold redundancy when P < K + 1

[0309] In the fourth possible implementation, P redundancy is determined by extracting one by one based on a uniform solution. The specific method is as follows:

[0310] Step 1: Select the frequency domain resource set S = [1, 2, .., K + 1] according to the maximum frequency baseline length K. That is, the frequency domain resource S is evenly distributed and its maximum frequency baseline length is K. At this time, the relationship between the baseline redundancy number and the baseline length is p k +|b k |=K+1, where p k represents the number of redundancies of the kth frequency baseline, |b k | represents the length of the kth frequency baseline.

[0311] Step 2: Extract a frequency resource from the frequency domain resource set S, for example, extract the kth frequency resource, and check whether the frequency baseline coverage formed by the remaining frequency resource set S' meets the P-fold redundancy distribution requirement.

[0312] Step 3: In step 2, if the extraction still meets the P-redundancy distribution requirement, repeat step 2 and further extract. If the extraction does not meet the P-redundancy distribution requirement, replace the extracted frequency position and check whether it meets the P-redundancy distribution requirement. Stop extraction when all frequency resources in S' are replaced and extracted and still cannot meet the P-redundancy distribution requirement.

[0313] While ensuring P-fold redundancy, this implementation requires fewer subcarriers than the third approach, effectively saving subcarrier frequency domain overhead. This avoids excessive communication resource usage and impacting communication performance. For the specific implementation of the first communication device determining the first frequency domain resource in step 201, please refer to the description of Figures 2C and 2D below and will not be repeated here.

[0314] 202. The first communication device sends a perception signal on a first frequency domain resource.

[0315] For example, the first frequency domain resources include frequency points 0, 2, 4, and 6. Frequency point 0 has a frequency of f0, frequency point 2 has a frequency of f2, frequency point 4 has a frequency of f4, and frequency point 6 has a frequency of f6. The first communication device then transmits perception signals at frequencies f0, f2, f4, and f6, respectively.

[0316] For example, the first frequency domain resource includes a frequency band between frequency f0 and frequency f6. The first communication device is a radar device that transmits a frequency modulated continuous wave (FMCW) signal in the frequency band between frequency f0 and frequency f6.

[0317] In the embodiment of the present application, in the embodiment shown in FIG. 2A , before the second communication device performs the sensing measurement on the sensing signal, the second communication device turns on the sensing function.

[0318] 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.

[0319] 202a. The first communication device sends a trigger instruction to the second communication device.

[0320] The trigger instruction is used to trigger the second communication device to activate the sensing function.

[0321] Specifically, before the first communication device sends the perception signal, the first communication device may trigger the second communication device to enable the perception function through a trigger instruction, so that the second communication device receives the perception signal and performs perception measurement on the perception signal.

[0322] Optionally, the trigger instruction is an RRC instruction or a DCI instruction.

[0323] The manner in which the third communication device triggers the second communication device to activate the sensing function is similar to the above step 202a, and will not be described in detail here.

[0324] In this embodiment, if the first communication device serves as the transmitter and receiver of the perception signal, the embodiment shown in FIG2A may further include steps 203 and 204. Steps 203 and 204 may be performed after step 202.

[0325] 203. The first communication device receives the reflected perception signal on the first frequency domain resource.

[0326] For example, as shown in Figure 1A, network device 1 transmits sensing signals at frequencies f0, f2, f4, and f6. The sensing signals are reflected by cars in the surrounding environment (i.e., sensing targets) and reach network device 1. Network device 1 then receives the sensing signals reflected by the sensing targets at frequencies f0, f2, f4, and f6.

[0327] For example, the first communication device is a radar device. The radar device transmits a continuously modulated frequency signal in a frequency band between frequencies f0 and f6. The sensing signal is reflected back to the radar device by sensing targets in the surrounding environment. The radar device receives the continuously modulated frequency signal in a frequency band between frequencies f0 and f6.

[0328] 204. The first communication device performs perception measurement on the perception signal to obtain a perception result.

[0329] In this embodiment, optionally, the perception result includes the distance between the first communication device and the perception target, the movement amount and position of the perception target, etc.

[0330] For example, as shown in Figure 1A, network device 1 transmits a sensing signal on two subcarriers at frequencies of 3.5 GHz and 3.501 GHz. At baseline 1, the initial phases of the sensing signals on both subcarriers are 0. A car is the sensing target. The phase shifts caused by the sensing signal on the two subcarriers at frequencies of 3.5 GHz and 3.501 GHz are 700π and 700.2π, respectively. The difference in phase shifts between the two subcarriers, Δφ, is 21 =0.2π, then network device 1 can determine f1 = 3.501 GHz, f2 = 3.5 GHz. Therefore, the distance between the network device 1 and the car is R1 = cτ / 2 = 15 m, where c is the speed of light under standard atmospheric conditions.

[0331] The speed of the car's movement relative to network device 1 can be determined by the change in the distance r between network device 1 and the car over time. The car's position can be determined by multiple network devices working together to sense and measure the distance to the car. For example, if each of the multiple network devices can measure the distance to the car, then the distance measurements from the four network devices can be combined to determine the car's coordinates in three-dimensional space, i.e., its position.

[0332] In this embodiment, if the first communication device serves as a transmitter of the perception signal and the second communication device serves as a receiver of the perception signal, the embodiment shown in FIG2A may further include steps 205 to 207. Steps 205 to 207 may be performed after step 202.

[0333] 205. The second communication device determines a first frequency domain resource.

[0334] In step 205, the second communication device may independently determine the first frequency domain resource based on the perceived demand parameter; alternatively, the second communication device may receive the first information from the first communication device and determine the first frequency domain resource based on the first information. Step 205 is similar to step 201. For details, please refer to the description of step 201 and will not be repeated here.

[0335] 206. The second communication device receives a perception signal on the first frequency domain resource.

[0336] For example, the first frequency domain resources include frequency points 0, 2, 4, and 6. Frequency point 0 has a frequency of f0, frequency point 2 has a frequency of f2, frequency point 4 has a frequency of f4, and frequency point 6 has a frequency of f6. The second communication device then receives perception signals at frequencies f0, f2, f4, and f6, respectively.

[0337] 207. The second communication device performs perception measurement on the perception signal to obtain a perception result.

[0338] For example, as shown in Figure 1B, network device 1 transmits signals on three subcarriers at frequencies of 3.5 GHz, 3.501 GHz, and 3.503 GHz. At network device 1, the initial phases of the sensing signals for these three subcarriers are all 0. A car is the sensing target. The sum of the distance between network device 1 and the car and the distance between the car and the terminal device is R1 + R2. Therefore, the sensing signal propagates through R1, reaches the car, and then returns through R2 to reach the terminal device.

[0339] The subcarrier with a frequency of 3.5 GHz is called subcarrier 1, f1 = 3.5 GHz. The subcarrier with a frequency of 3.501 GHz is called subcarrier 2, f2 = 3.5 GHz 0.1 Hz. The subcarrier with a frequency of 3.503 GHz is called subcarrier 3, f3 = 3.5 GHz 0.3 Hz.

[0340] The phase changes caused by the sensing signal on subcarrier 1, subcarrier 2 and subcarrier 3 are 700.01π, 700.19π and 700.61π respectively. And the difference in phase change between subcarrier 1 and subcarrier 2 is △φ 21 =0.18π. Then network device 1 can determine Then the distance from network device 1 to the car and then to the terminal device is calculated to be R1+R2=cτ1=27m.

[0341] The difference in phase change between subcarrier 2 and subcarrier 3 is △φ 32 =0.42π, then network device 1 can determine Then the distance from network device 1 to the car and then to the terminal device is calculated to be R1+R2=cτ2=31.5m.

[0342] The difference in phase change between subcarrier 1 and subcarrier 3 is △φ 31 =0.6π, then network device 1 can determine Then the distance from network device 1 to the car and then to the terminal device is calculated to be R1+R2=cτ3=30m, where c is the speed of light under standard atmospheric conditions.

[0343] The above calculations show that different subcarriers produce different results. This is primarily due to noise in the actual measurement process, which can lead to measurement deviations. Therefore, network device 1 can average the results of measurements from different subcarriers to obtain the final result, thereby reducing the impact of measurement noise. The sum of the distance from network device 1 to the car plus the distance from the car to the terminal device is (27m + 31.5m + 30m) / 3 = 29.5m.

[0344] It should be noted that network device 1 or terminal device can determine the distance from network device 1 to the vehicle and then to the terminal device based on the specific application scenario. For example, in a safety-critical vehicle positioning scenario, where the terminal device is car 2, network device 1 or car 2 can use a final measurement result of 27 meters from network device 1 to the vehicle and then to car 2. This prevents driving safety issues between cars 1 and 2 due to measurement errors.

[0345] The distance between network device 1 and the car, the distance between the car and the terminal device, and the car's location can be obtained through joint ranging measurement by multiple network devices and the terminal device. For example, the terminal device can obtain the distance from the terminal device to the car and from the car to multiple network devices. The combined ranging results of the terminal device for the four network devices can then be used to determine the coordinates of the car in three-dimensional space, i.e., the car's location. The car's speed can be determined by the change in the car's location over time.

[0346] In this embodiment of the present application, a first communication device determines a first frequency domain resource that satisfies a frequency baseline P-fold redundant distribution. The first communication device then transmits a perception signal on the first frequency domain resource. As can be seen, the technical solution of this application can reduce frequency baseline loss caused by channel frequency selective fading, reduce interference, and improve perception performance. Furthermore, it can also improve the measurement signal-to-noise ratio.

[0347] In the embodiment of the present application, there are multiple ways for the first communication device to determine the first frequency domain resource, and three possible implementations are shown below, which are specifically described in conjunction with Figures 2C, 2D, and 2E.

[0348] The first implementation method is described below in conjunction with the embodiment shown in FIG2C .

[0349] Please refer to FIG. 2C , the above step 201 specifically includes steps 201 a and 201 b.

[0350] Step 201a: The first communication device obtains a perception requirement parameter.

[0351] Specifically, there are multiple ways for the first communication device to obtain the perception requirement parameter. Two possible implementations are shown below.

[0352] Implementation method 1: The first communication device determines the perception requirement parameter according to the perception requirement.

[0353] In a possible implementation, the sensing requirement includes a requirement for sensing ranging through sensing signals.

[0354] For example, as shown in FIG1B , the network device 1 determines the unambiguous distance and ranging resolution, etc., by itself according to the sensing requirements.

[0355] Implementation method 2: The first communication device receives the perception requirement parameter from the second communication device or the third communication device.

[0356] For example, as shown in Figure 1B, the first communication device is network device 1, and the second communication device is a terminal device. The terminal device can send a perception request and corresponding perception requirement parameters to network device 1, enabling the terminal device to perceive the surrounding environment through perception signals. In response, network device 1 receives the perception request and perception requirement parameters from the terminal device. The perception request is used to request network device 1 to send a perception signal.

[0357] For example, as shown in Figure 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 can send a sensing requirement parameter to network device 1 and a trigger instruction to network device 2. The trigger instruction is used to trigger network device 2 to enable the sensing function.

[0358] Step 201b: The first communication device determines a first frequency domain resource according to the sensing requirement parameter.

[0359] For a detailed description of step 201b, please refer to the detailed description of the embodiments shown in FIG. 3 to FIG. 5 hereinafter, which will not be described in detail here.

[0360] Based on the implementation of the above steps 201a to 201b, optionally, the embodiment shown in FIG2C further includes step 201c. Step 201c is performed after step 201b.

[0361] 2C , step 201c specifically includes: the first communication device sends the first information to the second communication device, and correspondingly, the second communication device receives the first information from the first communication device.

[0362] The first information is used to indicate the frequency domain position of the first frequency domain resource.

[0363] Specifically, the first communication device indicates the frequency domain position of the first frequency domain resource to the second communication device through the first information.

[0364] In this embodiment, there are multiple ways to indicate the first information, and three possible ways are shown below.

[0365] Indication method 1: The first information includes frequency domain resource construction parameters.

[0366] The frequency domain resource construction parameter is used to construct the first frequency domain resource.

[0367] In this indication method, the first communication device and the second communication device pre-set a formula for constructing the first frequency domain resource and required parameters.

[0368] For example, the first frequency domain resource can be represented as {1, 2, ..., N1+P, 2*(N1+1), 2*(N1+1)+1, ..., 2*(N1+1)+P-1, ..., N2*(N1+1), N2*(N1+1)+1, ..., N2*(N1+1)+P-1}*|b in the above embodiment min The frequency domain resource configuration parameters include the number of frequency domain resources N1 of the first frequency domain resource set, the number of frequency domain resources N2 of the second frequency domain resource set, the number of redundant distribution times P, and the minimum frequency baseline length |b min Substituting the frequency domain resource construction parameters into the above formula can construct the first frequency domain resource. This indication method can save the amount of data of the first information.

[0369] Indication method 2: the first information includes the frequency domain position of the first frequency domain resource.

[0370] 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 the frequencies corresponding to frequency point 1, frequency point 2, and frequency point 3, respectively.

[0371] Indication method 3: the first information includes a sensing quality index (SQI).

[0372] The perceptual quality index is used to indicate the frequency domain position of the first frequency domain resource.

[0373] In this indication method, a table is pre-configured in the first communication device and the second communication device. The table is used to indicate the mapping relationship between the perceptual quality index and the frequency domain resources. In the table, the perceptual quality index has a corresponding frequency domain resource.

[0374] For example, as shown in Table 1, the following is introduced by taking the manner in which the first frequency domain resource includes a frequency point combination as an example.

[0375] Table 1

[0376] Among them, f xRefers to the frequency of frequency point x. x is a positive integer between [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.

[0377] In this embodiment, optionally, the first information is carried in RRC signaling or DCI signaling.

[0378] 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 successfully received the first information. Optionally, the embodiment shown in FIG2C above further includes step 201d, as shown in FIG2C for details. Step 201d may be performed after step 201c.

[0379] Step 201d: The second communication device sends a first response message to the first communication device. Correspondingly, the first communication device receives the first response message from the second communication device.

[0380] The first response message is used to notify the first communication device that the second communication device has successfully received the first information.

[0381] The second implementation is described below with reference to FIG. 2D .

[0382] FIG2D is a schematic diagram of another embodiment of the communication method according to an embodiment of the present application. If the first communication device acts as the transmitter of the perception signal and the second communication device acts as the receiver of the perception signal, referring to FIG2D , optionally, step 201 above specifically includes steps 201d and 201e.

[0383] Step 201d: The second communication device sends the second information to the first communication device. Correspondingly, the first communication device receives the second information from the second communication device.

[0384] The second information is used to indicate the frequency domain position of the first frequency domain resource.

[0385] 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 via 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 described above. For details, please refer to the description of the first communication device determining the first frequency domain resource in step 201b in FIG. 2C , which will not be repeated here.

[0386] The indication method of the second information is similar to the indication method of the first information mentioned above. For details, please refer to the relevant introduction of the indication method of the first information mentioned above, which will not be repeated here.

[0387] In this embodiment, optionally, the second information is carried in RRC signaling or DCI signaling.

[0388] Step 201e: The first communication device determines the first frequency domain resource according to the second information.

[0389] Optionally, after the first communication device receives the second information, the embodiment shown in FIG2D further includes step 201f. Step 201f is performed after step 201e.

[0390] 201f: The first communication device sends a second response message to the second communication device. Correspondingly, the second communication device receives the second response message from the first communication device.

[0391] The second response message is used to notify the second communication device that the first communication device has successfully received the second information.

[0392] In the embodiment of the present application, there are multiple ways for the first communication device to determine the first frequency domain resource according to the perception demand parameter in the above step 201b, and two possible implementation methods are shown below.

[0393] Implementation method 1: The first communication device determines the first frequency domain resource according to the perception requirement parameter and the first mapping relationship.

[0394] The first mapping relationship includes a mapping relationship between perception requirement parameters and frequency domain resources.

[0395] Optionally, the first mapping relationship can be represented by a table. For example, as shown in Table 2, Table 2 takes the example of the first frequency domain resource including the frequency combination and the sensing requirement parameter including the ranging unambiguous distance and the ranging resolution as an example for explanation.

[0396] Table 2

[0397] For example, in the sensing requirement parameters, the unambiguous distance of ranging is 90 and the ranging resolution is 10. Then, according to Table 2 above, the first communication device can determine the frequency combination as {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,800,1400,1800}.

[0398] It should be noted that when the ranging unambiguous distance and ranging resolution in the perception requirement parameters do not match any set of ranging unambiguous distances and ranging resolutions in Table 2, the first communication device can select a frequency point combination corresponding to a set of ranging unambiguous distances and ranging resolutions that are approximate to the ranging unambiguous distance and ranging resolution in the perception requirement parameters as the first frequency domain resource.

[0399] For example, in the perception requirement parameters, the ranging unambiguous distance is 89 and the ranging resolution is 11, then the first communication device can select the frequency point combination corresponding to the ranging unambiguous distance of 90 and the ranging resolution of 10 in Table 2 as the first frequency domain resource.

[0400] It can be seen from Table 2 above that, when the ranging resolution requirement is the same, the larger the ranging unambiguous distance is, the more frequency points the frequency point combination includes to meet the ranging unambiguous distance requirement.

[0401] For example, as shown in Table 2, the unambiguous distance of ranging is 90, the ranging resolution is 10, and the corresponding frequency combination is {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,800,1400,1800}. The unambiguous distance of ranging is 130, the ranging resolution is 10, and the corresponding frequency combination is {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,400,1200,2000,2600}. Frequency combination {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,400,1200,2000,2600} includes significantly more frequency points than the frequency point combination {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,800,1400,1800} includes a large number of frequency points.

[0402] It can be seen from Table 2 above that, when the ranging unambiguous distance in the perception requirement parameters is the same, the smaller the ranging resolution, the more frequency points the frequency point combination includes to meet the ranging resolution requirement.

[0403] For example, as shown in Table 2, the unambiguous distance of ranging is 90, the ranging resolution is 10, and the corresponding frequency combination is {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,800,1400,1800}.

[0404] The unambiguous distance of ranging is 90, the ranging resolution is 5, and the corresponding frequency combination is {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,100,200,600,1000,1400,1700,1800}. From this we can see that the frequency combination {f(j)|f(j)=3.5*109 +j*15*10 3 ,j=0,100,200,600,1000,1400,1700,1800} includes more frequency points than the frequency point combination {f(j)|f(j)=3.5*10 9 +j*15*10 3 ,j=0,200,800,1400,1800} includes a large number of frequency points.

[0405] It should be noted that the above-mentioned Table 2 can be pre-configured on the first communication device, or it can be sent to the first communication device by other communication devices, or the first communication device determines the frequency combination corresponding to each group of perception demand parameters through multiple groups of perception demand parameters in accordance with implementation method 2, and then generates and saves Table 2.

[0406] In the above implementation manner 1, the first communication device determines the first frequency domain resource by looking up a table, so that the time consumed by the first communication device to determine the first frequency domain resource is short and computing resources can be effectively saved.

[0407] Implementation method 2: The first communication device determines the first frequency domain resource from the frequency domain resource pool according to the content included in the perception demand parameter.

[0408] Figure 2E is a schematic diagram of another embodiment of the communication method according to an embodiment of the present application. Optionally, the above step 201 specifically includes step 201g and step 201h.

[0409] Step 201g: The first communication device obtains the frequency response amplitude.

[0410] Specifically, there are multiple ways for the first communication device to obtain the frequency response amplitude. Two possible implementations are shown below.

[0411] Implementation method 1: The first communication device obtains the frequency response amplitude by acquiring channel state information (CSI).

[0412] For example, as shown in Figure 1B, the first communication device is network device 1, and the second communication device is a terminal device. The terminal device can send CSI to network device 1. In response, network device 1 receives CSI. CSI contains frequency response information, and the frequency response amplitude can be obtained from CSI.

[0413] Implementation method 2: The first communication device obtains a frequency response amplitude by testing the perception signal in the frequency domain in the frequency domain resource pool.

[0414] For example, as shown in Figure 1B , the first communication device is network device 1, and the second communication device is a terminal device. Network device 1 can send a perception signal to the terminal device in a frequency domain within a frequency domain resource pool, and the terminal device receives and feeds back a frequency response. Alternatively, the terminal device can send a perception signal in a frequency domain within a frequency domain resource pool, and network device 1 receives and obtains a frequency response.

[0415] Step 201h: The first communication device determines the first frequency domain resource according to the frequency response amplitude. The greater the difference in the frequency response amplitude, the greater the frequency fading degree, and the larger the required P value.

[0416] In one possible implementation, the frequency response amplitude difference may be represented by any one of the following three frequency response amplitude parameters:

[0417] 1. The ratio of the maximum to minimum frequency response amplitude α. The larger the α value, the greater the difference in frequency response amplitude.

[0418] 2. The ratio of the variance of the frequency response amplitude to the square of the mean β. The larger the β value, the greater the difference in the frequency response amplitude.

[0419] 3. The ratio of the standard deviation of the frequency response amplitude to the mean of the amplitude response, γ. The larger the γ value, the greater the difference in the frequency response amplitude.

[0420] For example, the corresponding relationship between the frequency response amplitude parameter and the P value can be referred to Table 3A, Table 3B, and Table 3C.

[0421] Table 3A

[0422] Table 3B

[0423] Table 3C

[0424] It is understandable that when the number of redundancy layers P=1, there is no redundancy. It can be considered that redundancy is turned off when P=1, and redundancy is turned on when P>1.

[0425] After determining the P value, the first communication device selects a first frequency domain resource from the frequency domain resource pool, and the first frequency domain resource satisfies the frequency baseline P-redundancy distribution.

[0426] This embodiment can be combined with the embodiment of FIG. 2C , and the first frequency domain resource can be determined by acquiring the perception demand parameter and / or the frequency response amplitude.

[0427] 1. The following describes, with reference to FIG3 , a method for determining a first frequency domain resource from a frequency domain resource pool based on a first communication device when the perceived requirement parameter includes an unambiguous ranging distance. Referring to FIG3 , step 201b specifically includes steps 3001 to 3002.

[0428] 3001. A first communication device determines a minimum frequency baseline threshold according to an unambiguous ranging distance.

[0429] Specifically, the unambiguous distance is r max , then the first communication device can determine the minimum frequency baseline threshold as

[0430] The following is a detailed explanation of the principles of step 3001. Assume that the first communication device uses two subcarriers for sensing ranging. The frequencies of the two subcarriers are f1 and f2, respectively. The first communication device transmits sensing signals on the two subcarriers, which pass through the target point and are reflected to the second communication device. The second communication device receives the reflected sensing signal. The time delay of the sensing signal along the entire path is τ. Assume that the initial phases of the sensing signals of the two subcarriers at the first communication device are both 0. Then, after the time delay τ, the phase changes on the two subcarriers are 2πf1τ and 2πf2τ, respectively.

[0431] The difference in phase change between two subcarriers can be expressed as ∆φ 21 =2π(f2-f1)τ.

[0432] The second communication device can measure the phase change of the two subcarriers and obtain the difference Δφ between the phase changes of the two subcarriers. 21 Then τ=△φ 21 / (2π(f2-f1)), then 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 speed of light under standard atmospheric conditions.

[0433] According to the formula τ=△φ 21 / (2π(f2-f1)) shows that the smaller the frequency baseline is, the smaller |f2-f1| is, so △φ 21 =2π(f2-f1)τ, as τ changes, it is less likely to exceed 2π (because △φ 21 If the value exceeds 2π, phase ambiguity will occur, which will lead to ranging ambiguity. Therefore, 2π(f2-f1)τ≤2π, then it is required Therefore, the smaller |f2-f1| is, the larger τ is, and the larger the unambiguous distance is. Therefore, in step 3001, the first communication device can determine the minimum frequency baseline of the frequency point combination based on the ranging unambiguous distance.

[0434] It should be noted that the initial phases of the perception signals of the two subcarriers at the first communication device may not be 0. The above is merely an example and does not limit the technical solution of the present application.

[0435] △φ 21 If the value exceeds 2π, phase ambiguity will occur, which will lead to ranging ambiguity. For example, assuming △φ 21 The actual value is 2kπ+π / 3, and the actual value obtained by measurement is π / 3. The delay determined by the actual value obtained by measurement is 1 / (6(f2-f1)), while the actual delay is (k+1 / 6) / (f2-f1). Therefore, the phase change difference △φ between subcarriers 21 The maximum value of is 2π, and the corresponding delay is τ max =1 / (f2-f1), the corresponding R max =cτ max =c(f2-f1). At this time, R max It is called the maximum unambiguous distance. That is, if the sum of the distance between the first communication device and the perceived target and the distance between the second communication device and the perceived target is less than R max , then there will be no ranging ambiguity. If the sum of the distance between the first communication device and the perceived target and the distance between the second communication device and the perceived target is greater than or equal to R max , there will be ranging ambiguity.

[0436] 3002. The first communication device determines a first frequency domain resource from a frequency domain resource pool according to a minimum frequency baseline.

[0437] This description uses the example of a first frequency domain resource including a frequency combination. Specifically, the first communications device selects a frequency from the frequency points included in the frequency domain resource pool to obtain a frequency combination. The frequency combination satisfies the minimum frequency baseline. In other words, if the frequency baseline formed by the frequency combination includes a frequency baseline with a length less than or equal to |bmin_thresh|, then the frequency combination is considered to satisfy the minimum frequency baseline threshold.

[0438] In the above step 3002, optionally, the first communication device may determine the first frequency domain resource in the following manner.

[0439] In one possible implementation, the first communication device determines multiple frequency combinations that meet the minimum frequency baseline from the frequency domain resource pool through an exhaustive method; then, the first communication device selects a frequency combination from the multiple frequency combinations.

[0440] In another possible implementation, the first communication device determines a frequency point combination that meets the minimum frequency baseline through a simulated annealing algorithm (or an ant colony algorithm) and the frequency points included in the frequency domain resource pool.

[0441] For example, the frequency combination includes frequency 0, frequency 2, frequency 4, and frequency 6. The frequencies in the frequency combination are arranged in ascending order of frequency. The frequency of frequency 0 is f0, the frequency of frequency 2 is f2, the frequency of frequency 4 is f4, and the frequency of frequency 6 is f6. The unambiguous distance of the ranging is rmax , so the minimum frequency baseline threshold is Among the frequency baselines formed by two different frequency points in the frequency combination, the frequency baseline formed by frequency points 0 and 2 has the smallest length |f0-f2|. If |f0-f2| is less than or equal to |bmin_thresh|, it can be understood that the frequency combination meets the minimum frequency baseline threshold.

[0442] It should be noted that the second communication device may also determine the first frequency domain resources according to the embodiment shown in FIG. 3 .

[0443] 4 , the method for the first communication device to determine the first frequency domain resource from the frequency domain resource pool based on the sensed requirement parameter including the ranging resolution is described below. Referring to FIG. 4 , the above step 201b specifically includes steps 4001 to 4002 .

[0444] 4001. A first communication device determines a maximum frequency baseline threshold according to a ranging resolution.

[0445] Specifically, if the ranging resolution is Δr, then the first communication device can determine the maximum frequency baseline threshold as

[0446] The specific principles of step 4001 are described below. Assume that the first communication device uses two subcarriers for sensing ranging. The frequencies of the two subcarriers are f1 and f2, respectively. The first communication device transmits sensing signals on each of the two subcarriers. The sensing signals pass through the target point and are reflected to the second communication device. The second communication device receives the reflected sensing signal. The time delay of the sensing signal along the entire path is τ. Assume that the initial phases of the sensing signals of the two subcarriers at the first communication device are both 0. Then, after the delay τ, the phase changes on the two subcarriers are 2πf1τ and 2πf2τ, respectively.

[0447] The difference in phase change between two subcarriers can be expressed as ∆φ 21 =2π(f2-f1)τ.

[0448] The second communication device can measure the phase change of the two subcarriers and obtain the difference Δφ between the phase changes of the two subcarriers. 21 Then τ=△φ 21 / (2π(f2-f1)), then 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 speed of light under standard atmospheric conditions.

[0449] According to the formula τ=△φ 21 / (2π(f2-f1)) shows that the larger the frequency baseline, the larger the |f2-f1|. For the same time delay τ, the larger the difference in phase change, that is, △φ 21 =2π(f2-f1)τ. The larger the change, the larger the frequency baseline is. It is more sensitive to the change of delay τ and easier to distinguish different delays. Therefore, in step 4001, the first communication device can determine the maximum frequency baseline of the frequency point combination in combination with the ranging resolution.

[0450] It should be noted that the initial phases of the perception signals of the two subcarriers at the first communication device may not be 0. The above is merely an example and does not limit the technical solution of the present application.

[0451] 4002. The first communication device determines a first frequency domain resource from a frequency domain resource pool according to a maximum frequency baseline.

[0452] This description uses the example of a first frequency domain resource including a frequency combination. Specifically, the first communications device selects a frequency from the frequency points included in the frequency domain resource pool to obtain a frequency combination. If the frequency combination satisfies the maximum frequency baseline threshold, that is, if the frequency baseline formed by the frequency combination includes a frequency baseline with a length greater than or equal to |bmax_thresh|, then the frequency combination is considered to satisfy the maximum frequency baseline threshold.

[0453] The specific determination method of step 4002 is similar to the determination method in step 3002 in the embodiment shown in Figure 3 above. Please refer to the relevant introduction of step 3002 in the embodiment shown in Figure 3 above for details, and will not be repeated here.

[0454] For example, the frequency combination includes frequency 0, frequency 2, frequency 4, and frequency 6. The frequencies in the frequency combination are arranged in ascending order of frequency. The frequency of frequency 0 is f0, the frequency of frequency 2 is f2, the frequency of frequency 4 is f4, and the frequency of frequency 6 is f6. The ranging resolution is △r, so the maximum frequency baseline threshold is In the frequency baselines of two different frequency point combinations in the frequency point combination, the length of the frequency baseline composed of frequency point 0 and frequency point 6 is |f0-f6|, and |f0-f6| is greater than or equal to |bmax_thresh|. It can be understood that this frequency point combination meets the maximum frequency baseline threshold.

[0455] It should be noted that the second communication device may also determine the first frequency domain resources according to the embodiment shown in FIG. 4 .

[0456] 3. The following describes, in conjunction with FIG5 , a method in which the first communication device determines a first frequency domain resource from a frequency domain resource pool based on the perceived requirement parameters, when the perceived requirement parameters include the unambiguous ranging distance and ranging resolution. Referring to FIG5 , step 201b specifically includes steps 5001 to 5003.

[0457] 5001. The first communication device determines a minimum frequency baseline threshold according to an unambiguous ranging distance.

[0458] 5002. The first communication device determines a maximum frequency baseline threshold according to a ranging resolution.

[0459] Step 5001 is similar to step 3001 in the embodiment shown in FIG3 . For details, please refer to the relevant introduction of step 5001 . Detailed description is omitted here. Step 5002 is similar to step 4001 in the embodiment shown in FIG3 . For details, please refer to the relevant introduction of step 4001 . Detailed description is omitted here.

[0460] There is no fixed execution order between step 5001 and step 5002. Step 5001 can be executed first, and then step 5002; or, step 5002 can be executed first, and then step 5001; or, step 5001 and step 5002 can be executed simultaneously depending on the situation. This application does not make any specific restrictions.

[0461] 5003. The first communication device determines a first frequency domain resource from a frequency domain resource pool according to a minimum frequency baseline threshold and a maximum frequency baseline threshold.

[0462] Here, the first frequency domain resource includes a frequency point combination as an example for introduction. 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. The frequency point combination satisfies the minimum frequency baseline threshold and the maximum frequency baseline threshold. For the relevant introduction of how the frequency point combination satisfies the minimum frequency baseline threshold and the maximum frequency baseline threshold, please refer to the relevant introduction of the embodiments shown in Figures 3 and 4 above. No further details will be given here.

[0463] Optionally, the frequency combination includes a subcarrier combination, and the subcarrier combination is a subcarrier combination with the least number of subcarriers among the subcarrier combinations that meet the maximum baseline length, the minimum baseline length, and the first condition.

[0464] Specifically, the first communication device searches for a subcarrier combination in real time using the maximum frequency baseline length, the minimum frequency baseline length, and the first condition as constraints and minimizing the number of subcarriers as an optimization goal to determine the subcarrier combination. There are various algorithms for searching for subcarrier combinations, such as an exhaustive search method, a simulated annealing algorithm, and an ant colony algorithm.

[0465] It should be noted that the second communication device may also determine the first frequency domain resources according to the embodiment shown in FIG. 5 .

[0466] The following describes the first communication device provided in an embodiment of the present application. Please refer to Figure 8, which is a schematic diagram of the structure of the first communication device in an embodiment of the present application. This first communication device can be used to perform the steps performed by the first communication device in the embodiments shown in Figures 2A, 2C, 2D, 2E, 3, 4, and 5. Reference can be made to the relevant descriptions in the above-mentioned method embodiments.

[0467] In one possible implementation, the communication device may include a module or unit that performs the method / operation / step / action performed by the first communication device in the above method embodiment. The unit may be a hardware circuit, software, or a combination of hardware circuit and software. In one possible implementation, the first communication device may include a processing module 801 and a transceiver module 802. The processing module 801 may be used to call the transceiver module 802 to perform receiving and / or sending functions.

[0468] The processing module 801 may be configured to determine a first frequency domain resource, where the first frequency domain resource satisfies a frequency baseline P-redundancy distribution;

[0469] The transceiver module 802 may be configured to send a perception signal on a first frequency domain resource.

[0470] It should be understood that the specific process executed by each module has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0471] The following describes the second communication device provided in an embodiment of the present application. Please refer to Figure 9, which is a schematic diagram of the structure of the second communication device in an embodiment of the present application. This second communication device can be used to perform the steps performed by the second communication device in the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. Reference can be made to the relevant descriptions in the above-mentioned method embodiments.

[0472] The second communication device may include a processing module 901 and a transceiver module 902. The processing module 901 may be configured to call the transceiver module 902 to perform a receiving and / or sending function.

[0473] The processing module 901 may be configured to determine a first frequency domain resource, where the first frequency domain resource satisfies a frequency baseline P-fold redundancy distribution.

[0474] The transceiver module 902 may be configured to receive a perception signal from a first communication device on a first frequency domain resource.

[0475] The processing module 901 may also be configured to perform perception measurement on the perception signal to obtain a perception result.

[0476] It should be understood that the specific process executed by each module has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0477] The present application also provides a first communication device, please refer to Figure 10, which is another structural schematic diagram of the first communication device in an embodiment of the present application. The first communication device can be used to execute the steps executed by the first communication device in the embodiments shown in Figures 2A, 2C, 2D, 2E, 3, 4 and 5. Please refer to the relevant description in the above method embodiments.

[0478] The first communication device includes: a processor 1001 and a transceiver 1003. Optionally, the communication device further includes a memory 1002.

[0479] In a possible implementation, the processor 1001, the memory 1002, and the transceiver 1003 are connected via buses, and computer instructions are stored in the memory.

[0480] The processor 1001 of this embodiment can execute the actions performed by the processing module 801 shown in Figure 8 above, and the specific implementation of the processor 1001 will not be repeated. The transceiver 1003 in this embodiment can execute the actions performed by the transceiver module 802 in the above embodiment, and the specific implementation of the transceiver 1003 will not be repeated.

[0481] In the first communication device shown in FIG. 10 , the processor 1001 and the memory 1002 may be integrated together or deployed separately, which is not specifically limited in this application.

[0482] It should be noted that the memory 1002 shown in FIG. 10 may also be deployed outside the first communication device shown in FIG. 10 .

[0483] The present application also provides a second communication device, please refer to Figure 11, which is another structural schematic diagram of the second communication device in an embodiment of the present application. The second communication device can be used to execute the steps executed by the second communication device in the embodiments shown in Figures 2A, 2C and 2D, and reference can be made to the relevant description in the above method embodiments.

[0484] The second communication device includes: a processor 1101 and a transceiver 1103. Optionally, the communication device further includes a memory 1102.

[0485] In a possible implementation, the processor 1101 , the memory 1102 , and the transceiver 1103 are connected via buses, and computer instructions are stored in the memory.

[0486] The processor 1101 of this embodiment can execute the actions performed by the processing module 901 shown in Figure 9 above, and the specific implementation of the processor 1101 will not be repeated. The transceiver 1103 in this embodiment can execute the actions performed by the transceiver module 902 in the above embodiment, and the specific implementation of the transceiver 1103 will not be repeated.

[0487] In the second communication device shown in FIG. 11 , the processor 1101 and the memory 1102 may be integrated together or deployed separately, which is not specifically limited in this application.

[0488] It should be noted that the memory 1102 shown in FIG. 11 may also be deployed outside the second communication device shown in FIG. 11 .

[0489] FIG12 is a schematic diagram showing a possible structure in which the first communication device or the second communication device is a terminal device.

[0490] Figure 12 shows a simplified structural diagram of a terminal device. For ease of understanding and illustration, in Figure 12, a mobile phone is used as an example of a terminal device. As shown in Figure 12, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and optional input and output devices. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

[0491] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then transmits the RF signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF 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, only one memory and processor are shown in Figure 12. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this embodiment of the application does not limit this.

[0492] In the embodiments of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device. As shown in Figure 12, the terminal device includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit can also be referred to as a processor, a processing board, a processing module, a processing device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 1210 can be regarded as a receiving unit, and the device used to implement the transmitting function in the transceiver unit 1210 can be regarded as a transmitting unit, that is, the transceiver unit 1210 includes a receiving unit and a transmitting unit. The transceiver unit can sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit can sometimes also be referred to as a receiver, a receiver, or a receiving circuit, etc. The transmitting unit can sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0493] In one possible implementation, the transceiver unit 1210 is used to perform the sending and receiving operations of the first communication device in the above method embodiment, and the processing unit 1220 is used to perform other operations except the sending and receiving operations on the first communication device in the above method embodiment.

[0494] For example, the processing unit 1202 is configured to execute step 201 and step 204 in Figure 2A. The transceiver unit 1210 is configured to execute step 202, step 203, step 206, and step 202a in Figure 2A.

[0495] In another possible implementation, the transceiver unit 1210 is used to perform the sending and receiving operations of the second communication device in the above method embodiment, and the processing unit 1220 is used to perform other operations except the sending and receiving operations on the second communication device in the above method embodiment.

[0496] For example, the processing unit 1202 is configured to execute step 205 and step 207 in Figure 2A. The transceiver unit 1210 is configured to execute step 202, step 203, step 206, and step 202a in Figure 2A.

[0497] 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, microprocessor, integrated circuit, or logic circuit integrated on the chip.

[0498] Referring to Figure 13 , an embodiment of the present application further provides a communication system, comprising a first communication device as shown in Figure 8 and a second communication device as shown in Figure 9 . The first communication device shown in Figure 8 is used 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 used to perform all or part of the steps performed by the second communication device in the embodiments shown in Figures 2A , 2C , and 2D .

[0499] An embodiment of the present application also provides a computer program product including computer instructions, which, when executed on a computer, enables the communication method of the embodiments shown in Figures 2A, 2C, 2D, 3, 4 and 5 above to be executed.

[0500] An embodiment of the present application also provides a computer-readable storage medium, including computer instructions. When the computer instructions are executed on a computer, the communication method of the embodiments shown in Figures 2A, 2C, 2D, 3, 4 and 5 above is executed.

[0501] An embodiment of the present application also provides a chip device, including a processor, which is used to connect to a memory and call a program stored in the memory so that the processor executes the communication method of the embodiments shown in Figures 2A, 2C, 2D, 3, 4 and 5 above.

[0502] The processor mentioned in any of the above may be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the communication method of the embodiments shown in Figures 2A, 2C, 2D, 3, 4, and 5. The memory mentioned in any of the above may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM), etc.

[0503] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0504] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0505] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0506] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0507] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

[0508] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless communication method, characterized in that: The method comprises: The first communication device determines a first frequency domain resource, where a frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer; the first communication device sends a perception signal on the first frequency domain resource.

2. The method according to claim 1, characterized in that The P-fold redundancy distribution satisfies the first condition and the second condition; The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length; The first length is k*the length of the minimum frequency baseline, k is a positive integer belonging to [1, K], K is the ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1; The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and the smallest P-1 frequency baselines, have a number of redundant distributions greater than or equal to P.

3. The method according to claim 1 or 2, characterized in that: The basis for setting the P value includes: the degree of frequency selective fading.

4. The method according to any one of claims 1 to 3, characterized in that The P value setting basis includes: frequency response amplitude difference.

5. The method according to claim 4, characterized in that The frequency response amplitude difference includes at least one of the following: a ratio of a maximum value to a minimum value of a frequency response amplitude, a ratio of a variance of a frequency response amplitude to a square of a mean value, and a ratio of a standard deviation of a frequency response amplitude to a mean value of an amplitude response.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: The first communication device obtains the perception requirement parameter; The first communication device determining the first frequency domain resource includes: The first communication device determines a first frequency domain resource from the frequency domain resource pool according to the perceived demand parameter.

7. The method according to claim 6, characterized in that The first communication device acquiring the perception requirement parameter includes: The first communication device receives a perceived need parameter from a third communication device.

8. The method according to any one of claims 1 to 7, characterized in that The perception requirement parameter includes a ranging unambiguous distance, and the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

9. The method according to any one of claims 1 to 8, characterized in that The perception requirement parameter includes a ranging resolution, and the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

10. The method according to any one of claims 1 to 9, characterized in that The perceived demand parameter includes a perceived resource occupancy rate, and the first frequency domain resource satisfies a maximum number of frequency domain resources N, which is determined according to the perceived resource occupancy rate.

11. The method according to any one of claims 1 to 10, characterized in that The first frequency domain resources include a subcarrier combination, and the subcarrier combination is a subcarrier combination including the least number of subcarriers among the subcarrier combinations satisfying the P redundancy.

12. The method according to any one of claims 1 to 11, characterized in that The first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

13. The method according to any one of claims 1 to 12, characterized in that The first frequency domain resources include frequency point combinations that meet the first condition and are respectively shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; described | b min | is the minimum frequency baseline; The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length; The first length is k*the length of the minimum frequency baseline, where k is a positive integer belonging to [1, K], K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1.

14. The method according to any one of claims 1 to 13, characterized in that The first frequency domain resources include: {1, 2, ..., N1 + P, 2 * (N1 + 1), 2 * (N1 + 1) + 1, ..., 2 * (N1 + 1) + P-1, ..., N2 * (N1 + 1), N2 * (N1 + 1) + 1, ..., N2 * (N1 + 1) + P-1} * | b min |; said |b min | is the minimum frequency baseline, and N1 and N2 are positive integers.

15. The method according to claim 14, characterized in that The N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |, the |b max | is the maximum frequency baseline.

16. The method according to claim 14 or 15, characterized in that The N1, N2, and P satisfy N≥N1+P*N2, and N is the maximum number of frequency domain resources.

17. The method according to claim 15 or 16, characterized in that The P is the maximum value that satisfies the constraint conditions.

18. The method according to any one of claims 1 to 17, characterized in that The method also includes: the first communication device sending first information to the second communication device, where the first information is used to indicate the frequency domain position of the first frequency domain resource.

19. The method according to claim 18, characterized in that The first information includes a frequency domain resource construction parameter, and the frequency domain resource construction parameter is used to construct a first frequency domain resource; or, The first information includes the frequency domain position of the first frequency domain resource; or, The first information includes a perceptual quality index, where the perceptual quality index is used to indicate a frequency domain position of the first frequency domain resource.

20. The method according to claim 18 or 19, characterized in that The first information is carried in radio resource control RRC signaling or downlink control information DCI signaling.

21. The method according to any one of claims 1 to 20, characterized in that The method further comprises: The first communication device sends a trigger signaling to the second communication device, where the trigger signaling is used to trigger the second communication device to turn on a sensing function.

22. The method according to claim 21, characterized in that The type of the trigger signaling includes RRC signaling or DCI signaling.

23. The method according to any one of claims 1 to 19, characterized in that The frequency domain resource pool includes frequency domain resources used for transmitting a channel state information reference signal between the first communication device and the second communication device; or, The frequency domain resource pool includes frequency domain resources used for transmitting channel data between the first communication device and the second communication device.

24. A wireless communication method, characterized in that: The method comprises: The second communication device determines a first frequency domain resource, where the frequency baseline formed by the first frequency domain resource satisfies a P-fold redundant distribution, where P is a positive integer; The second communication device receives a perception signal from the first communication device on the first frequency domain resource.

25. The method according to claim 24, characterized in that The P-fold redundancy distribution satisfies the first condition and the second condition; The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length; The first length is k*the length of the minimum frequency baseline, k is a positive integer belonging to [1, K], and K is the maximum frequency baseline The ratio of the length of to the length of the minimum frequency baseline, K is greater than or equal to 1; The second condition includes: the frequency baselines formed by the first frequency domain resources, except for the largest P-1 and the smallest P-1 frequency baselines, have a number of redundant distributions greater than or equal to P.

26. The method according to claim 24 or 25, characterized in that The basis for setting the P value includes: the degree of frequency selective fading.

27. The method according to any one of claims 24 to 26, characterized in that The P value setting basis includes: frequency response amplitude difference.

28. The method according to claim 27, characterized in that The frequency response amplitude difference includes at least one of the following: a ratio of a maximum value to a minimum value of a frequency response amplitude, a ratio of a variance of a frequency response amplitude to a square of a mean value, and a ratio of a standard deviation of a frequency response amplitude to a mean value of an amplitude response.

29. The method according to any one of claims 24 to 28, characterized in that The method further comprises: The second communication device obtains the perception requirement parameter; The second communication device determining the first frequency domain resource includes: The second communication device determines a first frequency domain resource from the frequency domain resource pool according to the perceived demand parameter.

30. The method according to any one of claims 24 to 29, characterized in that The perception requirement parameter includes a ranging unambiguous distance, and the first frequency domain resource meets a minimum frequency baseline threshold, and the minimum frequency baseline threshold is determined according to the ranging unambiguous distance.

31. The method according to any one of claims 24 to 30, characterized in that The perception requirement parameter includes a ranging resolution, and the first frequency domain resource meets a maximum frequency baseline threshold, and the maximum frequency baseline threshold is determined according to the ranging resolution.

32. The method according to any one of claims 24 to 31, characterized in that The perceived demand parameter includes a perceived resource occupancy rate, and the first frequency domain resource satisfies a maximum number of frequency domain resources N, which is determined according to the perceived resource occupancy rate.

33. The method according to any one of claims 24 to 32, characterized in that The first frequency domain resources are a frequency domain resource set formed by extracting some frequency domain resources from a uniformly distributed frequency domain resource set.

34. The method according to any one of claims 24 to 33, characterized in that The first frequency domain resources include frequency point combinations that meet the first condition and are respectively shifted by (0, 1, 2, ..., P-1)*|b min |Then take the frequency combination obtained by the union; described | b min | is the minimum frequency baseline; The first condition includes: the frequency baseline formed by the first frequency domain resource includes a frequency baseline of a first length; The first length is k*the length of the minimum frequency baseline, where k is a positive integer belonging to [1, K], K is a ratio of the length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1.

35. The method according to any one of claims 24 to 34, characterized in that The first frequency domain resources include: {1, 2, ..., N1 + P, 2 * (N1 + 1), 2 * (N1 + 1) + 1, ..., 2 * (N1 + 1) + P-1, ..., N2 * (N1 + 1), N2 * (N1 + 1) + 1, ..., N2 * (N1 + 1) + P-1} * | b min |; said |b min | is the minimum frequency baseline, and N1 and N2 are positive integers.

36. The method according to claim 35, characterized in that The N1, N2, and P satisfy N2*(N1+1)+P-1≥|b max | / |b min |, the |b max | is the maximum frequency baseline.

37. The method according to claim 35 or 36, characterized in that The N1, N2, and P satisfy N≥N1+P*N2, and N is the maximum number of frequency domain resources.

38. The method according to claim 36 or 37, characterized in that The P is the maximum value that satisfies the constraint conditions.

39. The method according to any one of claims 24 to 38, characterized in that The method further comprises: The second communication device receives first information from the first communication device, wherein the first information is used to indicate the The frequency domain position of the first frequency domain resource.

40. The method according to claim 39, characterized in that The first information includes a frequency domain resource construction parameter, and the frequency domain resource construction parameter is used to construct a first frequency domain resource; or, The first information includes the frequency domain position of the first frequency domain resource; or, The first information includes a perceptual quality index, where the perceptual quality index is used to indicate a frequency domain position of the first frequency domain resource.

41. The method according to any one of claims 24 to 40, characterized in that The method further comprises: The second communication device receives a trigger signaling sent from the first communication device, where the trigger signaling is used to trigger the second communication device to activate a sensing function.

42. A communication device, characterized in that: The method comprises a module for executing the method as claimed in any one of claims 1 to 23, or comprises a module for executing the method as claimed in any one of claims 24 to 41.

43. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute the method according to any one of claims 1 to 41 by running a computer program or by a logic circuit.

44. The device according to claim 43, characterized in that Also included is a memory for storing the computer program.

45. The device according to claim 43 or 44, characterized in that Also included is a communication interface, which is used to input and / or output signals.

46. ​​A communication system, characterized in that: include: A first communication device for executing the method according to any one of claims 1 to 23, and a second communication device for executing the method according to any one of claims 24 to 41.

47. A computer-readable storage medium, characterized in that Used to store computer program instructions, the computer program causing a computer to execute the method according to any one of claims 1 to 41.

48. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 41.

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