Time-frequency resource determination method and related device

Abstract

The invention provides a time-frequency resource determination method and a related device. The method provided by the present application comprises: a first device determining a first time-frequency domain feedback dimension bias of a first channel and / or a first density bias of a reference signal, the reference signal being used for measuring the first channel, the first channel being a channel between the first device and a second device, the first time-frequency domain feedback dimension bias and / or the first density bias are respectively related to multipath elements MPC of the first device and the second device; and the first device determines a first time-frequency resource used for feeding back channel information of the first channel according to the basic time-frequency domain feedback dimension of the first channel and the first time-frequency domain feedback dimension offset, and / or determines a second time-frequency resource occupied by a reference signal according to the basic density of the reference signal and the first density offset. The overhead of channel measurement and feedback can be reduced, and the robustness of channel measurement and feedback under non-ideal factors can be improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method for determining time and frequency resources and related apparatus. Background Technology

[0002] Currently, by inputting information about the user and base station (e.g., the user's coordinates and environmental information between the user and base station) into a radio map, the radio map outputs the multipath component (MPC) between the user and the base station. However, when using radio maps for channel prediction, deterministic information about multipaths can be predicted, such as the direction of departure (DOD), direction of arrival (DOA), power, and delay, but the phase of the multipaths is random. Currently, sparse measurement feedback of channel information is used to correct the phase of multipaths. How to achieve measurement of sparse channels to reduce the overhead of channel measurement and feedback is a problem worth considering. Summary of the Invention

[0003] This application provides a time-frequency resource determination method and related apparatus, used by a first apparatus to determine a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first apparatus and the second apparatus, thereby determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. The first apparatus determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. This enables the acquisition of channel information of the first channel by measuring the reference signal. This helps to reduce the overhead of channel measurement and feedback. Furthermore, the first apparatus determines the first time-frequency resource in combination with the first time-frequency domain feedback dimension offset, and / or determines the second time-frequency resource in combination with the first density offset of the reference signal, thereby considering the influence of non-ideal factors through the first time-frequency domain feedback dimension offset and / or the first density offset, which helps to improve the robustness of channel measurement and feedback under non-ideal factors.

[0004] This application provides a method for determining time-frequency resources. This method can be executed by a first device, which may be a terminal device, a network device (e.g., an access network device or a core network device), a component within the terminal device or network device (e.g., a processor, chip, or chip system), a logic module or software capable of implementing all or part of the functions of the terminal device, or a logic module or software capable of implementing all or part of the functions of the network device. The method includes: the first device determining a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal, the reference signal being used to measure the first channel, the first channel being a channel between the first device and a second device, the first time-frequency domain feedback dimension offset and / or the first density offset being respectively related to the MPC of the first device and the second device; the first device determining a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determining a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal.

[0005] In the above technical solution, the first device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device, thereby determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. The first device determines the first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or, the first device determines the second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. This enables the acquisition of channel information of the first channel by measuring the reference signal. This helps to reduce the overhead of channel measurement and feedback. Furthermore, the first device determines the first time-frequency resource in combination with the first time-frequency domain feedback dimension offset, and / or determines the second time-frequency resource in combination with the first density offset of the reference signal, thereby considering the influence of non-ideal factors through the first time-frequency domain feedback dimension offset and / or the first density offset, which helps to improve the robustness of channel measurement and feedback under non-ideal factors.

[0006] Based on the first aspect, in one possible implementation, the first device determines the second time-frequency resource occupied by the reference signal based on the base density of the reference signal and a first density offset, including: the first device determines the second time-frequency resource occupied by the reference signal based on the base density of the reference signal, the first density offset, and the first time-frequency resource. In this implementation, the first device can determine the second time-frequency resource by referring to the first time-frequency resource used for feeding back channel information of the first channel. This enables feeding back channel information on the first time-frequency resource by measuring the reference signal.

[0007] Based on the first aspect, in one possible implementation, the first device determines a first time-frequency domain feedback dimension offset and / or a first density offset of the reference signal for the first channel, including: the first device performing performance testing based on the basic time-frequency domain feedback dimension of the first channel according to the MPC and performance requirement information of the communication system in which the first device and the second device reside, to determine the first time-frequency domain feedback dimension offset; and / or, the first device performing performance testing based on the basic density of the reference signal according to the MPC and performance requirement information, to determine the first density offset of the reference signal. In this implementation, the first time-frequency domain feedback dimension offset and / or the first density offset are determined by combining the MPC and the performance requirement information of the communication system. The first time-frequency domain feedback dimension offset is used to determine the first time-frequency resource used for feedback of channel information of the first channel, and the first density offset is used to determine the second time-frequency resource occupied by the reference signal. This is beneficial to improving the robustness of channel measurement and feedback under non-ideal factors. For example, the time-frequency domain feedback dimension offset and / or density offset may be different under different MPCs and signal-to-noise ratios, which is beneficial to improving the performance of channel measurement and feedback.

[0008] Based on the first aspect, in one possible implementation, the first device determines the first time-frequency domain feedback dimension offset and / or the first density offset of the reference signal for the first channel, including: the first device determining the first time-frequency domain feedback dimension offset and / or the first density offset corresponding to the MPC between the first device and the second device and the performance requirement information of the communication system in which the first device is located, according to a first mapping relationship. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and the time-frequency domain feedback dimension offset, and / or the mapping relationship between MPC and performance requirement information and the density offset. This enables the first device to quickly determine the first time-frequency domain feedback dimension offset and / or the first density offset. Combined with the limitations of the first mapping relationship, the first device can select a suitable time-frequency domain feedback dimension offset and / or density offset by combining MPC and performance requirement information. This is beneficial for improving the robustness of channel measurement and feedback under non-ideal factors.

[0009] Based on the first aspect, in one possible implementation, the first device determines a first time-frequency domain feedback dimension offset of the first channel and / or a first density offset of the reference signal, comprising: the first device receiving first information from a second device, the first information being used to indicate the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. This enables the first device to determine the first time-frequency domain feedback dimension offset and / or the first density offset.

[0010] Based on the first aspect, in one possible implementation, the method further includes: a first device sending second information to a second device, the second information indicating a first time-frequency resource used for feedback of channel information of the first channel, and / or a second time-frequency resource occupied by a reference signal. In this implementation, the first device can synchronize the first time-frequency resource and / or the second time-frequency resource with the second device. This facilitates the transmission of the reference signal between the first and second devices via the second time-frequency resource, and the measurement of the reference signal to obtain channel information on the first time-frequency resource. This enables the measurement and feedback of the first channel.

[0011] Based on the first aspect, in one possible implementation, the method further includes: a first device determining basic time-frequency resources for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel, and / or determining basic time-frequency resources occupied by the reference signal based on the basic density of the reference signal; the first device determining offset time-frequency resources for feeding back channel information of the first channel based on the first time-frequency domain feedback dimension offset, and / or determining offset time-frequency resources occupied by the reference signal based on the first density offset; the first device sending third information to the second device, the third information indicating at least one of the following: basic time-frequency resources for feeding back channel information of the first channel, basic time-frequency resources occupied by the reference signal, offset time-frequency resources for feeding back channel information of the first channel, or offset time-frequency resources occupied by the reference signal. This implementation shows another way for the first device and the second device to synchronize the first time-frequency resources and / or the second time-frequency resources, enriching the implementation options. The first time-frequency resources include basic time-frequency resources and offset time-frequency resources for feeding back channel information of the first channel. The second time-frequency resources include basic time-frequency resources and offset time-frequency resources occupied by the reference signal. This facilitates the transmission of reference signals between the first and second devices via the second time-frequency resource, and the measurement of the reference signals to obtain channel information on the first time-frequency resource. This enables the measurement and feedback of the first channel.

[0012] Based on the first aspect, in one possible implementation, the method further includes: a first device receiving a first request from a second device, the first request being used to request an update of a first time-frequency domain feedback dimension offset and / or a first density offset; the first device updating the first time-frequency domain feedback dimension offset and / or updating the first density offset to obtain the updated first time-frequency domain feedback dimension offset and / or the updated first density offset. Updating the first time-frequency domain feedback dimension offset and / or the first density offset facilitates the selection of appropriate time-frequency domain feedback dimension offset and / or density offset by combining the updated MPC and the updated performance requirement information of the communication system. This improves the robustness of channel measurement and feedback under non-ideal factors. For example, when the second device detects a change in MPC or a change in performance requirement information, the second device can request an update of the first time-frequency domain feedback dimension offset and / or the first density offset.

[0013] Based on the first aspect, in one possible implementation, the first request includes at least one of the following: updating MPC or updating performance requirement information between the first device and the second device; the first device updates the first time-frequency domain feedback dimension offset and / or updates the first density offset to obtain the updated first time-frequency domain feedback dimension offset and / or the updated first density offset, including: the first device determines the second time-frequency domain feedback dimension offset and / or the second density offset that commonly correspond to the updated MPC and updated performance requirement information according to the first mapping relationship, and uses the second time-frequency domain feedback dimension offset as the updated first time-frequency domain feedback dimension offset, and / or uses the second density offset as the updated first density offset. This achieves the integration of the updated MPC and the updated performance requirement information of the communication system to update the first time-frequency domain feedback dimension offset and / or update the first density offset, thereby improving the robustness of channel measurement and feedback under non-ideal conditions.

[0014] Based on the first aspect, in one possible implementation, the method further includes: a first device sending a first instruction to a second device, the first instruction indicating an update of the first time-frequency domain feedback dimension offset and / or the first density offset; the first device receiving updated MPC information between the first and second devices and updated performance requirement information of the communication system in which the first and second devices reside; the first device determining, according to a first mapping relationship, the second time-frequency domain feedback dimension offset and / or the second density offset corresponding to both the updated MPC and the updated performance requirement information, and using the second time-frequency domain feedback dimension offset as the updated first time-frequency domain feedback dimension offset, and / or using the second density offset as the updated first density offset. This achieves the updating of the first time-frequency domain feedback dimension offset and / or the first density offset by combining the updated MPC and the updated performance requirement information of the communication system, thereby improving the robustness of channel measurement and feedback under non-ideal conditions.

[0015] Based on the first aspect, in one possible implementation, the method further includes: a first device determining a third time-frequency resource for feeding back channel information of the first channel based on a basic time-frequency domain feedback dimension and an updated first time-frequency domain feedback dimension offset, and / or determining a fourth time-frequency resource occupied by a reference signal based on a basic density and an updated first density offset; the first device sending fourth information to a second device, the fourth information indicating the third time-frequency resource for feeding back channel information of the first channel and / or the fourth time-frequency resource occupied by the reference signal. This enables the first device to indicate the updated time-frequency resource for feeding back channel information of the first channel and / or the updated time-frequency resource occupied by the reference signal to the second device. This allows the first device and the second device to transmit a reference signal via the fourth time-frequency resource and measure the reference signal to obtain channel information on the third time-frequency resource. This enables measurement and feedback of the first channel.

[0016] Based on the first aspect, in one possible implementation, the method further includes: a first device determining updated offset time-frequency resources for feeding back channel information of the first channel based on an updated first time-frequency domain feedback dimension offset, and / or determining updated offset time-frequency resources occupied by a reference signal based on an updated first density offset; the first device sending fifth information to a second device, the fifth information indicating at least one of the following: updated offset time-frequency resources for feeding back channel information of the first channel, or updated offset time-frequency resources occupied by the reference signal. This implementation shows another way to indicate updated time-frequency resources for feeding back channel information of the first channel and / or updated time-frequency resources occupied by the reference signal, enriching the implementation of the scheme. This facilitates the transmission of a reference signal between the first and second devices through the basic time-frequency resources and offset time-frequency resources occupied by the reference signal, and the measurement of the reference signal to obtain channel information on a third time-frequency resource. This enables the measurement and feedback of the first channel. Furthermore, the first device indicates to the second device the updated offset time-frequency resources for feeding back channel information of the first channel and / or the updated offset time-frequency resources occupied by the reference signal. This helps reduce indication overhead.

[0017] Based on the first aspect, in one possible implementation, the method further includes: a first device receiving a second request from a second device, the second request being for requesting an update of a first time-frequency domain feedback dimension bias and / or a first density bias; the first device sending a second instruction to the second device, the second instruction being for indicating that the first time-frequency domain feedback dimension bias and / or the first density bias should be maintained.

[0018] A second aspect of this application provides a time-frequency resource method, which can be executed by a second device. The second device can be a terminal device, a network device (e.g., an access network device or a core network device), a component within the terminal device or network device (e.g., a processor, chip, or chip system), a logic module or software capable of implementing all or part of the functions of the terminal device, or a logic module or software capable of implementing all or part of the functions of the network device. The method includes: the second device receiving second information from a first device, the second information indicating a first time-frequency resource for feeding back channel information of a first channel, and / or a second time-frequency resource occupied by a reference signal, wherein the first channel is a channel between the first device and the second device, and the reference signal is used to measure the first channel; the second device determining the first time-frequency resource and / or the second time-frequency resource based on the second information. In this implementation, the first device and the second device synchronize the first time-frequency resource and / or the second time-frequency resource. This facilitates the transmission of the reference signal between the first device and the second device through the second time-frequency resource, and the measurement of the reference signal to obtain the channel information of the first channel. This achieves the measurement and feedback of the first channel.

[0019] A third aspect of this application provides a time-frequency resource method, which can be executed by a second device. The second device can be a terminal device, a network device (e.g., an access network device or a core network device), a component in the terminal device or network device (e.g., a processor, a chip, or a chip system), a logic module or software capable of implementing all or part of the functions of the terminal device, or a logic module or software capable of implementing all or part of the functions of the network device. The method includes: the second device receiving third information from a first device, the third information indicating at least one of the following: basic time-frequency resources for feeding back channel information of a first channel, basic time-frequency resources occupied by a reference signal, offset time-frequency resources for feeding back channel information of the first channel, or offset time-frequency resources occupied by the reference signal, wherein the first channel is a channel between the first device and the second device, and the reference signal is used to measure the first channel; the second device determining at least one of the following based on the third information: basic time-frequency resources for feeding back the first channel, offset time-frequency resources, basic time-frequency resources occupied by the reference signal, or offset time-frequency resources. In this implementation, the first and second devices are synchronized to feed back the basic time-frequency resources, offset time-frequency resources, and the basic time-frequency resources or offset time-frequency resources occupied by the reference signal of the first channel. This facilitates the transmission of the reference signal using the basic time-frequency resources and offset time-frequency resources occupied by the reference signal, and the measurement of the reference signal to obtain channel information for feeding back the first channel. This achieves the measurement and feedback of the first channel.

[0020] Based on the second or third aspect, in one possible implementation, the method further includes: a second device determining a first time-frequency domain feedback dimension offset of the first channel and / or a first density offset of the reference signal; the second device sending first information to the first device, the first information indicating the first time-frequency domain feedback dimension offset and / or the first density offset of the reference signal. This enables the second device to acquire the first time-frequency domain feedback dimension offset and / or the first density offset.

[0021] Based on the second or third aspect, in one possible implementation, the second device determines the first time-frequency domain feedback dimension offset and / or the first density offset of the reference signal for the first channel. This includes: the second device determining the first time-frequency domain feedback dimension offset and / or the first density offset corresponding to the MPC between the first and second devices and the performance requirement information of the communication system in which the first and second devices reside, according to a first mapping relationship. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and the time-frequency domain feedback dimension offset, and / or the mapping relationship between MPC and performance requirement information and the density offset. This enables the second device to quickly determine the first time-frequency domain feedback dimension offset and / or the first density offset. Combined with the constraints of the first mapping relationship, the second device can quickly select a suitable time-frequency domain feedback dimension offset and / or density offset by combining MPC and performance requirement information. This further determines suitable first time-frequency resources for feeding back channel information of the first channel and / or second time-frequency resources occupied by the reference signal. This helps reduce the overhead of channel measurement and feedback, and also helps improve the robustness of channel measurement and feedback under non-ideal conditions.

[0022] Based on the second or third aspect, in one possible implementation, the second device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal, including: the second device performing performance testing based on the basic time-frequency domain feedback dimension of the first channel according to the MPC between the first and second devices and the performance requirement information of the communication system in which the first and second devices reside, to determine the first time-frequency domain feedback dimension offset; and / or, the second device performing performance testing based on the basic density of the reference signal according to the MPC and performance requirement information, to determine the first density offset of the reference signal. In this implementation, the second device determines the first time-frequency domain feedback dimension offset and / or the first density offset based on the MPC and performance requirement information. The first time-frequency domain feedback dimension offset is used to determine the first time-frequency resource used for feedback of channel information of the first channel, and the first density offset is used to determine the second time-frequency resource occupied by the reference signal. This is beneficial for reducing the overhead of channel measurement and feedback, and also beneficial for improving the robustness of channel measurement and feedback under non-ideal factors. Another implementation for determining the first time-frequency domain feedback dimension offset and / or the first density offset of the reference signal is also provided, enriching the implementation of the scheme.

[0023] Based on the second or third aspect, in one possible implementation, the method further includes: a second device sending a first request to a first device, the first request being for requesting an update of the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. For example, when the second device detects a change in MPC or a change in performance requirement information, the second device may request an update of the first time-frequency domain feedback dimension offset and / or the first density offset. This allows the second device to determine suitable time-frequency resources for feeding back channel information of the first channel and / or time-frequency resources occupied by the reference signal. This enables better channel measurement and feedback under non-ideal conditions, improving the performance of channel measurement and feedback.

[0024] Based on the second or third aspect, in one possible implementation, the method further includes: a second device receiving a first instruction from a first device, the first instruction indicating an update to the first time-frequency domain feedback dimension offset and / or the first density offset; the second device sending updated MPC and updated performance requirement information of the communication system between the first and second devices to the first device. For example, if the second device detects a change in MPC, it can indicate an update to the first time-frequency domain feedback dimension offset and / or the first density offset. Then, the second device can feed back the updated MPC and updated performance requirement information to the first device. This facilitates the second device in determining suitable time-frequency resources for feeding back channel information of the first channel and / or time-frequency resources occupied by the reference signal. This enables better channel measurement and feedback under non-ideal conditions, improving the performance of channel measurement and feedback.

[0025] Based on the second or third aspect, in one possible implementation, the method further includes: the second device receiving fourth information from the first device, the fourth information indicating a third time-frequency resource used for feeding back channel information of the first channel and / or a fourth time-frequency resource occupied by a reference signal, wherein the third time-frequency resource is an updated time-frequency resource used for feeding back channel information of the first channel, and the fourth time-frequency resource is an updated time-frequency resource occupied by the reference signal. This enables the first device and the second device to synchronize the updated time-frequency resources used for feeding back channel information of the first channel and / or the updated time-frequency resources occupied by the reference signal. This achieves measurement and feedback of the first channel, improving the performance of the first channel measurement and feedback.

[0026] Based on the second or third aspect, in one possible implementation, the method further includes: the second device receiving fifth information from the first device, the fifth information indicating at least one of the following: updated offset time-frequency resources used for feedback of channel information of the first channel, and / or, updated offset time-frequency resources occupied by the reference signal. This enables the first device and the second device to synchronize the updated offset time-frequency resources used for feedback of channel information of the first channel and / or the updated offset time-frequency resources occupied by the reference signal. This facilitates the measurement and feedback of the first channel, improving the performance of the first channel measurement and feedback. Furthermore, the second device and the first device can synchronize the update of the offset time-frequency resources, which helps reduce the overhead of the first device indicating time-frequency resources to the second device.

[0027] Based on the second or third aspect, in one possible implementation, the method further includes: the second device sending a second request to the first device, the second request being for requesting an update of the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal; the second device receiving a second instruction from the first device, the second instruction being for indicating that the first time-frequency domain feedback dimension offset and / or the first density offset should be maintained.

[0028] A fourth aspect of this application provides a first device, comprising:

[0029] The processing module is configured to determine a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal, wherein the reference signal is used to measure the first channel, the first channel being a channel between a first device and a second device, and the first time-frequency domain feedback dimension offset and / or the first density offset being respectively related to the MPC of the first device and the second device; determine a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determine a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal.

[0030] Based on the fourth aspect, in one possible implementation, the processing module is specifically used to: determine the second time-frequency resource occupied by the reference signal based on the basic density of the reference signal, the first density bias, and the first time-frequency resource.

[0031] Based on the fourth aspect, in one possible implementation, the processing module is specifically used to: perform performance testing based on the fundamental time-frequency domain feedback dimension of the first channel according to the MPC and the performance requirement information of the communication system in which the first device and the second device reside, to determine the first time-frequency domain feedback dimension offset, and / or, perform performance testing based on the fundamental density of the reference signal according to the MPC and the performance requirement information, to determine the first density offset of the reference signal. In this implementation, the first time-frequency domain feedback dimension offset and / or the first density offset are determined based on the MPC and the performance requirement information.

[0032] Based on the fourth aspect, in one possible implementation, the processing module is specifically used to: determine the first time-frequency domain feedback dimension bias and / or the first density bias corresponding to the MPC between the first device and the second device and the performance requirement information of the communication system where the first device is located, according to the first mapping relationship. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias.

[0033] Based on the fourth aspect, in one possible implementation, the processing module is specifically used to: receive first information from the second device, the first information being used to indicate the first time-frequency domain feedback dimension bias of the first channel and / or the first density bias of the reference signal.

[0034] Based on the fourth aspect, in one possible implementation, the first device further includes a transceiver module; the transceiver module is further configured to: send second information to the second device, the second information being used to indicate a first time-frequency resource for feeding back channel information of the first channel, and / or, a second time-frequency resource occupied by a reference signal.

[0035] Based on the fourth aspect, in one possible implementation, the processing module is further configured to: determine the basic time-frequency resources for feeding back channel information of the first channel according to the basic time-frequency domain feedback dimension of the first channel, and / or determine the basic time-frequency resources occupied by the reference signal according to the basic density of the reference signal; determine the bias time-frequency resources for feeding back channel information of the first channel according to the first time-frequency domain feedback dimension bias, and / or determine the bias time-frequency resources occupied by the reference signal according to the first density bias; the first device further includes a transceiver module; the transceiver module is configured to send third information to the second device, the third information being used to indicate at least one of the following: the basic time-frequency resources for feeding back channel information of the first channel, the basic time-frequency resources occupied by the reference signal, the bias time-frequency resources for feeding back channel information of the first channel, or the bias time-frequency resources occupied by the reference signal.

[0036] Based on the fourth aspect, in one possible implementation, the first device further includes a transceiver module; the transceiver module is configured to receive a first request from the second device, the first request being used to request an update of the first time-frequency domain feedback dimension offset and / or the first density offset; the processing module is further configured to: update the first time-frequency domain feedback dimension offset and / or update the first density offset, to obtain the updated first time-frequency domain feedback dimension offset and / or the updated first density offset.

[0037] Based on the fourth aspect, in one possible implementation, the first request includes at least one of the following: updating MPC or updating performance requirement information between the first device and the second device; the processing module is specifically used to: determine the second time-frequency domain feedback dimension bias and / or the second density bias that are jointly corresponding to the updated MPC and the updated performance requirement information according to the first mapping relationship, and use the second time-frequency domain feedback dimension bias as the updated first time-frequency domain feedback dimension bias, and / or use the second density bias as the updated first density bias.

[0038] Based on the fourth aspect, in one possible implementation, the first device further includes a transceiver module; the transceiver module is configured to send a first instruction to the second device, the first instruction being used to indicate updating the first time-frequency domain feedback dimension offset and / or the first density offset; receive update MPC between the first device and the second device and update performance requirement information of the communication system in which the first device and the second device reside; the processing module is further configured to: determine the second time-frequency domain feedback dimension offset and / or the second density offset corresponding to both the update MPC and the update performance requirement information according to the first mapping relationship, and use the second time-frequency domain feedback dimension offset as the updated first time-frequency domain feedback dimension offset, and / or use the second density offset as the updated first density offset.

[0039] Based on the fourth aspect, in one possible implementation, the processing module is further configured to: determine a third time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel and the updated first time-frequency domain feedback dimension offset, and / or determine a fourth time-frequency resource occupied by the reference signal based on the basic density of the reference signal and the updated first density offset; the first device further includes a transceiver module, which is configured to send fourth information to the second device, the fourth information being used to indicate the third time-frequency resource for feeding back channel information of the first channel and / or the fourth time-frequency resource occupied by the reference signal.

[0040] Based on the fourth aspect, in one possible implementation, the processing module is further configured to: determine the updated offset time-frequency resources for feeding back channel information of the first channel according to the updated first time-frequency domain feedback dimension offset, and / or determine the updated offset time-frequency resources occupied by the reference signal according to the updated first density offset; the first device further includes a transceiver module, which is configured to send fifth information to the second device, the fifth information being used to indicate at least one of the following: the updated offset time-frequency resources for feeding back channel information of the first channel, or the updated offset time-frequency resources occupied by the reference signal.

[0041] Based on the fourth aspect, in one possible implementation, the first device further includes a transceiver module, which is configured to receive a second request from the second device, the second request being for requesting an update of the first time-frequency domain feedback dimension bias and / or the first density bias; and to send a second instruction to the second device, the second instruction being for indicating that the first time-frequency domain feedback dimension bias and / or the first density bias should be maintained.

[0042] A fifth aspect of this application provides a second device, comprising:

[0043] The transceiver module is used to receive second information from the first device. The second information is used to indicate the first time-frequency resources for feeding back channel information of the first channel, and / or the second time-frequency resources occupied by the reference signal. The first channel is a channel between the first device and the second device, and the reference signal is used to measure the first channel.

[0044] The processing module is used to determine the first time-frequency resource and / or the second time-frequency resource based on the second information.

[0045] A sixth aspect of this application provides a second device, comprising:

[0046] The transceiver module is used to receive third information from the first device. The third information is used to indicate at least one of the following: basic time-frequency resources for feeding back channel information of the first channel, basic time-frequency resources occupied by the reference signal, offset time-frequency resources for feeding back channel information of the first channel, or offset time-frequency resources occupied by the reference signal. The first channel is a channel between the first device and the second device, and the reference signal is used to measure the first channel.

[0047] The processing module is used to determine at least one of the following based on the third information: the basic time-frequency resources, the offset time-frequency resources, the basic time-frequency resources occupied by the reference signal, or the offset time-frequency resources for feeding back the first channel.

[0048] Based on the fifth or sixth aspect, in one possible implementation, the processing module is further configured to: determine the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal; the transceiver module is further configured to: send first information to the first device, the first information being used to indicate the first time-frequency domain feedback dimension offset and / or the first density offset of the reference signal.

[0049] Based on the fifth or sixth aspect, in one possible implementation, the processing module is specifically used to: determine, according to the first mapping relationship, the first time-frequency domain feedback dimension bias and / or the first density bias that are jointly corresponding to the MPC between the first device and the second device and the performance requirement information of the communication system in which the first device and the second device are located. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias.

[0050] Based on the fifth or sixth aspect, in one possible implementation, the processing module is specifically used to: perform performance testing based on the basic time-frequency domain feedback dimension of the first channel according to the MPC between the first device and the second device and the performance requirement information of the communication system in which the first device and the second device are located, to determine the first time-frequency domain feedback dimension bias, and / or, perform performance testing based on the basic density of the reference signal according to the MPC and the performance requirement information, to determine the first density bias of the reference signal.

[0051] Based on the fifth or sixth aspect, in one possible implementation, the transceiver module is further configured to: send a first request to the first device, the first request being used to request an update of the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal.

[0052] Based on the fifth or sixth aspect, in one possible implementation, the transceiver module is further configured to: receive a first instruction from the first device, the first instruction being used to indicate updating the first time-frequency domain feedback dimension bias and / or the first density bias; and send to the first device update MPC between the first device and the second device and update performance requirement information of the communication system in which the first device and the second device reside.

[0053] Based on the fifth or sixth aspect, in one possible implementation, the transceiver module is further configured to: receive fourth information from the first device, the fourth information being used to indicate the third time-frequency resource used for feeding back channel information of the first channel and / or the fourth time-frequency resource occupied by the reference signal, the third time-frequency resource being the updated time-frequency resource used for feeding back channel information of the first channel, and the fourth time-frequency resource being the updated time-frequency resource occupied by the reference signal.

[0054] Based on the fifth or sixth aspect, in one possible implementation, the transceiver module is further configured to: receive fifth information from the first device, the fifth information being used to indicate at least one of the following: updated offset time-frequency resources for feeding back channel information of the first channel, and / or, updated offset time-frequency resources occupied by the reference signal.

[0055] Based on the fifth or sixth aspect, in one possible implementation, the transceiver module is further configured to: send a second request to the first device, the second request being for requesting an update of the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal; and receive a second indication from the first device, the second indication being for indicating that the first time-frequency domain feedback dimension offset and / or the first density offset should be maintained.

[0056] Regarding the first and fourth aspects mentioned above, the first device may be a terminal device or a network device, or a component within a terminal device or network device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of a terminal device, or a logic module or software capable of implementing all or part of the functions of a network device. The transceiver module may be a transceiver, or an input / output interface; the processing module may be a processor.

[0057] In one implementation, the first device is a chip, chip system, or circuit configured in a terminal device or network device. When the first device is a chip, chip system, or circuit configured in a terminal device or network device, the transceiver module may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing module may be a processor, processing circuit, or logic circuit.

[0058] Regarding the second, third, fifth, and sixth aspects, the second device may be a terminal device or a network device, or a component within a terminal device or network device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of a terminal device, or a logic module or software capable of implementing all or part of the functions of a network device. The transceiver module may be a transceiver, or an input / output interface; the processing module may be a processor.

[0059] In one implementation, the second device is a chip, chip system, or circuit configured in a terminal device or network device. When the second device is a chip, chip system, or circuit configured in a terminal device or network device, the transceiver module may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing module may be a processor, processing circuit, or logic circuit.

[0060] A seventh aspect of this application provides a first apparatus comprising a processor and a memory. The memory stores computer programs or computer instructions, and the processor is configured to call and execute the computer programs or computer instructions stored in the memory, causing the processor to implement any of the implementations described in the first aspect.

[0061] Optionally, the first device further includes a transceiver, the processor of which controls the transceiver to transmit and receive signals.

[0062] An eighth aspect of this application provides a second apparatus comprising a processor and a memory. The memory stores computer programs or computer instructions, and the processor is configured to call and execute the computer programs or computer instructions stored in the memory, such that the processor implements any one of the implementations of the second and third aspects.

[0063] Optionally, the second device further includes a transceiver, the processor of which controls the transceiver to transmit and receive signals.

[0064] A ninth aspect of this application provides a first apparatus, including a processor and an interface circuit, the processor being configured to communicate with other devices via the interface circuit and to perform the method described in the first aspect above. The processor may include one or more devices.

[0065] A tenth aspect of this application provides a second apparatus, including a processor and an interface circuit, the processor being configured to communicate with other apparatus via the interface circuit and to perform the methods described in any one of the second and third aspects. The processor may include one or more devices.

[0066] The eleventh aspect of this application provides a first apparatus, including a processor for connection to a memory, for calling a program stored in the memory to execute the method described in the first aspect. The memory may be located within or outside the first apparatus. The processor may include one or more processors.

[0067] A twelfth aspect of this application provides a second apparatus, including a processor connected to a memory, for invoking a program stored in the memory to execute the method described in either the second or third aspect. The memory may be located within or outside the second apparatus. The processor may include one or more processors.

[0068] In one implementation, the first device shown in the first and fourth aspects above can be a chip or a chip system. The second device shown in the second, third, fifth, and sixth aspects above can be a chip or a chip system.

[0069] The thirteenth aspect of this application provides a computer program product including computer instructions, characterized in that, when run on a computer, it causes the computer to perform any of the implementations of the first to third aspects.

[0070] The fourteenth aspect of this application provides a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform any of the implementations of any one of the first to third aspects.

[0071] The fifteenth aspect of this application provides a chip device including a processor for calling a computer program or computer instructions in memory to cause the processor to execute any one of the implementations of the first to third aspects described above.

[0072] Optionally, the processor is coupled to the memory via an interface.

[0073] The sixteenth aspect of this application provides a communication system comprising a first device as shown in the fourth aspect and a second device as shown in the fifth aspect; or, the communication system comprises a first device as shown in the fourth aspect and a second device as shown in the sixth aspect.

[0074] As can be seen from the above technical solution, the first device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device. The reference signal is used to measure the first channel, which is the channel between the first device and the second device. Then, the first device determines the first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determines the second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. Thus, the first device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. And the first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device, thereby determining the appropriate first time-frequency domain feedback dimension offset and / or first density offset. The first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset, and / or, the first device determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. This enables the acquisition of channel information of the first channel by measuring the reference signal, which helps reduce the overhead of channel measurement and feedback. Furthermore, the first device determines the first time-frequency resource in conjunction with the first time-frequency domain feedback dimension offset, and / or determines the second time-frequency resource in conjunction with the first density offset of the reference signal. This allows the influence of non-ideal factors to be considered through the first time-frequency domain feedback dimension offset and / or the first density offset, thereby improving the robustness of channel measurement and feedback under non-ideal factors. Attached Figure Description

[0075] Figure 1 This is a schematic diagram of a communication system according to an embodiment of this application;

[0076] Figure 2 This is a schematic diagram of one embodiment of the time-frequency resource determination method of this application;

[0077] Figure 3 This is a schematic diagram of another embodiment of the time-frequency resource determination method of this application;

[0078] Figure 4 This is a schematic diagram of yet another embodiment of the time-frequency resource determination method of this application;

[0079] Figure 5 This is a schematic diagram of the structure of the first device according to an embodiment of this application;

[0080] Figure 6 This is a schematic diagram of the structure of the second device according to an embodiment of this application;

[0081] Figure 7 This is a schematic diagram of the structure of a device according to an embodiment of this application;

[0082] Figure 8 This is another structural schematic diagram of the device according to an embodiment of this application;

[0083] Figure 9 This is another structural schematic diagram of the device according to an embodiment of this application. Detailed Implementation

[0084] This application provides a time-frequency resource determination method and related apparatus. A first apparatus determines a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first apparatus and the second apparatus, thereby determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. The first apparatus determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or, the first apparatus determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. This helps reduce the overhead of channel measurement and feedback. Furthermore, the first apparatus determines the first time-frequency resource in conjunction with the first time-frequency domain feedback dimension offset, and / or determines the second time-frequency resource in conjunction with the first density offset of the reference signal, realizing the consideration of the influence of non-ideal factors through the first time-frequency domain feedback dimension offset and / or the first density offset, thereby improving the robustness of channel measurement and feedback under non-ideal factors.

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0086] References to "one embodiment" or "some embodiments" as described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of 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 "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0087] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0088] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A.

[0089] In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to instruct the information to be instructed, such as, but not limited to, directly instructing the information to be instructed, such as the information to be instructed itself or its index; indirectly instructing the information to be instructed by instructing other information, where there is a relationship between the other information and the information to be instructed; or instructing only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent.

[0090] The information to be instructed can be sent as a whole or divided into multiple sub-information messages, and the sending period and / or timing of these sub-information messages can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information messages can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0091] It is understood that "send" and "receive" in this application refer to the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY via the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0092] In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, wiring, or interfaces.

[0093] It is understandable that information may undergo necessary processing, such as encoding and modulation, between the source and destination, but the destination can understand the valid information from the source. Similar statements in this application can be interpreted in a similar way and will not be elaborated further.

[0094] The technical solution of this application can be applied to cellular communication systems related to the 3rd Generation Partnership Project (3GPP). For example, 4th generation (4G) communication systems, 5th generation (5G) communication systems, and future communication systems beyond 5th generation. For instance, 4th generation communication systems may include Long Term Evolution (LTE) communication systems. 5th generation communication systems may include New Radio (NR) communication systems. The technical solution of this application can also be applied to Wireless Fidelity (WiFi) systems, communication systems supporting the convergence of multiple wireless technologies, device-to-device (D2D) systems, or vehicle-to-everything (V2X) communication systems, etc.

[0095] The communication system to which the technical solution of this application applies includes a first device and a second device. The first device and the second device can execute the technical solution of this application.

[0096] In one possible implementation, the first device is a terminal device, or a chip, chip system, or processor within the terminal device; or a logic module or software that implements some or all of the terminal device's functions. The second device is a network device, or a chip, chip system, or processor within the network device; or a logic module or software that implements some or all of the network device's functions. For example, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of a communication system according to an embodiment of this application. The first device is a terminal device 101, and the second device is a network device 102.

[0097] In another possible implementation, the first device is a network device, or a chip, chip system, or processor within the network device; or a logic module or software that implements some or all of the functions of the network device. The second device is a terminal device, or a chip, chip system, or processor within the terminal device; or a logic module or software that implements some or all of the functions of the terminal device. For example, such as Figure 1 As shown, the first device is network device 102, and the second device is terminal device 101.

[0098] The first device and the second device may also be other forms of equipment, and this application does not limit them.

[0099] The terminal equipment and network equipment involved in this application are described below.

[0100] The terminal device can be a wireless terminal device capable of receiving scheduling and instruction information from network devices. The wireless terminal device can be a device that provides voice and / or data connectivity to the user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem.

[0101] Terminal devices can communicate with one or more core networks or the Internet via an access network. Terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones), computers, and data cards. For example, they can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets, and computers with wireless transceiver capabilities. Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, subscriber station (SS), customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), etc.

[0102] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices or smart wearable devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables. Examples include glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0103] Terminal devices can also be drones, robots, device-to-device (D2D) communication devices, vehicle-to-everything (V2X) devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless devices in industrial control, wireless devices in self-driving, wireless devices in remote medical care, wireless devices in smart grids, wireless devices in transportation safety, wireless devices in smart cities, or wireless devices in smart homes, etc.

[0104] Furthermore, the terminal device can also be a terminal device in a future communication system evolving from the 5th generation (5G) communication system, or a terminal device in a future public land mobile network (PLMN). For example, future communication systems can further expand the form and function of 5G communication terminals, and terminals in future communication systems include, but are not limited to, vehicles, cellular network terminals (integrating satellite terminal functions), drones, or Internet of Things (IoT) devices.

[0105] In this embodiment, the terminal device has artificial intelligence (AI) capabilities. For example, the terminal device can obtain AI services provided by network devices or servers. The terminal device also has AI processing capabilities.

[0106] It should be noted that the terminal device may be a device or apparatus with a chip, or a device or apparatus with integrated circuitry, or a chip, module or control unit in the device or apparatus shown above. This application does not limit the specific device.

[0107] Network devices can be devices within a wireless network. For example, a network device can be an access network node that connects terminal devices to the wireless network, also known as a base station. Currently, some examples of network devices include: base stations (gNodeB, gNB), transmission reception points (TRP), evolved Node Bs (eNB), radio network controllers (RNC), Node Bs (NB), home base stations (e.g., home evolved Node B, or home Node B, HNB), base band units (BBU), or wireless fidelity (Wi-Fi) access points (APs) in 5G communication systems. Additionally, in a network architecture, access network devices can include centralized unit (CU) nodes, distributed unit (DU) nodes, CU-control plane (CP), CU-user plane (UP), or radio units (RU), or RAN equipment including CU and DU nodes. CU and DU can be separate entities or included in the same network element, such as a baseband unit (BBU). RU can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRU), active antenna units (AAU), or remote radio heads (RRH). In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open RAN (ORAN) system, CU can also be called an open CU (O-CU), DU can also be called an open DU (O-DU), CU-CP can also be called an open CU-CP (O-CU-CP), CU-UP can also be called an open CU-UP (O-CU-UP), and RU can also be called an open RU (O-RU). Any of the CU (or CU-CP, CU-UP), DU, and RU units can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0108] Network equipment can be any other device that provides wireless communication functions for terminal devices. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment. For ease of description, the embodiments of this application are not limited. For example, the network equipment can be core network equipment. For example, core network equipment includes network elements such as the mobility management entity (MME), home subscriber server (HSS), serving gateway (S-GW), policy and charging rules function (PCRF), and public data network gateway (PDN gateway, P-GW) in fourth-generation (4G) networks; and access and mobility management function (AMF), user plane function (UPF), or session management function (SMF) in 5G networks. Furthermore, the core network equipment may also include other core network equipment in 5G networks and future 5G networks. Optionally, the core network equipment is used to manage the mobility of terminal devices, etc.

[0109] In this embodiment, all the network devices described above can be network nodes with AI capabilities, providing AI services to terminal devices or other network devices. For example, the network devices can be AI nodes, computing power nodes, access network nodes with AI capabilities, or core network elements with AI capabilities on the network side (access network or core network).

[0110] It should be noted that the network devices can be the devices or apparatuses shown above, or components (e.g., chips), modules, or units in the devices or apparatuses shown above, and this application does not limit the specifics.

[0111] Currently, by inputting information about the user and base station (e.g., the user's coordinates and environmental information between the user and base station) into a radio map, the radio map outputs the multipath phase correlation (MPC) between the user and the base station. However, when using radio maps for channel prediction, deterministic information about multipath propagation can be predicted, such as one or more of DOD, DOA, power, and delay, but the phase of the multipath propagation is random. Currently, sparse measurement feedback of channel information is used to correct the phase of multipath propagation. How to achieve measurement of sparse channels is a problem worth considering.

[0112] This application provides a corresponding technical solution: a first device determines the time-frequency domain feedback dimension offset of a first channel and / or the density offset of a reference signal. The reference signal is used to measure the first channel, which is the channel between the first device and the second device. Then, the first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the time-frequency domain feedback dimension offset of the first channel, and / or determines a second time-frequency resource occupied by the reference signal based on the basic density and density offset of the reference signal. Thus, the first device determines the time-frequency domain feedback dimension offset of the first channel. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device, thereby determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. The first device determines the first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the time-frequency domain feedback dimension offset of the first channel. This facilitates obtaining the channel information of the first channel by measuring the reference signal. It helps reduce the overhead of channel measurement domain feedback and also helps improve the robustness of channel measurement and feedback under non-ideal factors.

[0113] The following describes some of the technical terms used in this application.

[0114] MPC (Multipath Component Analysis) refers to the multipath element between the transmitter and receiver. MPC can include at least one of DoD (DoD), DoA (DoA), power, elevation angle, azimuth angle, or time delay. DoD refers to the angle at which the path originates from the transmitter, including the horizontal (azimuth) and vertical (elevation) angles of origin. DoA refers to the angle at which the path arrives at the receiver, including the horizontal (azimuth) and vertical (elevation) angles of arrival. Time delay refers to the time it takes for the path to travel from the transmitter to the receiver, also known as the time of flight.

[0115] Radio frequency map (RF map): Also known as a wireless map, a radio map is a map used to display the coverage area and signal strength distribution of wireless signals, reflecting the parameter values ​​of various locations within a wireless network. Common radio maps include channel gain maps, received signal strength maps, and power spectral density maps. Radio maps are widely used in wireless communication and networking, including network planning, interference control, power control, resource allocation, handover management, multi-hop routing, dynamic spectrum access, and cognitive radio network tasks.

[0116] Here are some common uses and functions of radio maps:

[0117] 1) Wireless Signal Coverage Analysis: Radio maps can display the signal coverage area of ​​wireless devices, helping users understand the signal strength and quality in each area. Through radio maps, users can assess whether the signal coverage meets their needs and whether there are blind spots or insufficient coverage.

[0118] 2) Signal Strength Distribution: Radio maps can display the signal strength distribution in different areas, visually representing signal strength levels using colors and other methods. Users can use radio maps to view signal strength trends, helping to optimize network performance.

[0119] 3) Network Planning and Optimization: Based on radio map analysis, wireless network planning and optimization can be performed. Users can adjust the layout of network equipment, signal coverage, and power according to the data from the radio map to improve network performance and coverage quality.

[0120] 4) Troubleshooting: By monitoring and analyzing the radio frequency (RF) map, users can promptly identify and resolve faults or problems in the wireless network. For example, changes in signal coverage can be observed through the RF map to pinpoint the cause of network failures. RF maps are typically generated using specialized RF testing equipment and software. On-site testing can be performed using specialized RF testing instruments, and the RF map is generated through data processing. Through the RF map, users can better understand the propagation of wireless signals, helping to improve network performance and user experience.

[0121] Reference signals: The reference signals involved in this application include, but are not limited to: channel state information-reference signal (CSI-RS), sounding reference signal (SRS), demodulation reference signal (DMRS), tracking reference signal (TRS), phase tracking reference signal (PT-RS), positioning reference signal (PRS), or sensing reference signal (SeRS), etc. The reference signals in this application may also be reference signals other than those listed above that can be carried in orthogonal frequency division multiplexing (OFDM) symbols, which will not be described further here.

[0122] Time-frequency resources: Data or information can be carried through time-frequency resources. These resources can include resources in the time domain (i.e., time-domain resources) and resources in the frequency domain (i.e., frequency-domain resources).

[0123] In the time domain, time-domain resources can include one or more time-domain units (or time units). Time-domain units can include radio frames (RF), subframes, frames, half-subframes, half-frames, slots, mini-slots, partial slots, or orthogonal frequency division multiplexing (OFDM) symbols, etc.

[0124] In the frequency domain, frequency domain resources can include one or more frequency domain units. Frequency domain units can include subcarriers, component carriers (CCs), resource elements (REs), resource blocks (RBs), subchannels, resource pools, bandwidth, bandwidth parts (BWPs), channels, or an interlaced RB, etc.

[0125] In this application, time-frequency resources include time-frequency points, and a time-frequency point can be regarded as an RE. For example, a time-frequency point includes a symbol and a subcarrier, and the symbol and the subcarrier correspond. Alternatively, a time-frequency point can also be regarded as an RB, without limitation.

[0126] Port: A port, also called an antenna port, can include transmit ports and receive ports. An antenna port is a logical concept; one antenna port can correspond to one physical transmit antenna or multiple physical transmit antennas. In both cases, the terminal's receiver will not decompose signals from the same antenna port. From the terminal's perspective, regardless of whether the channel is formed by a single physical transmit antenna or by combining multiple physical transmit antennas, the reference signal (RS) corresponding to this antenna port defines it. For example, the antenna port corresponding to the demodulation reference signal (DMRS) is the DMRS port, and the terminal can obtain the channel estimate for the corresponding antenna port based on the reference signal. Each antenna port corresponds to a time / frequency resource grid and has its own independent reference signal. One antenna port is one channel, and the terminal performs channel estimation and data demodulation based on the reference signal corresponding to that antenna port.

[0127] Optionally, a port refers to a port after beamforming and / or phase rotation.

[0128] An antenna port is typically associated with a reference signal (e.g., a pilot signal), and its meaning can be understood as a transmit / receive interface on the channel through which the reference signal passes. In low-frequency systems, an antenna port may correspond to one or more antenna elements that jointly transmit the reference signal; the receiver can treat them as a whole without distinguishing between individual elements. In high-frequency systems, an antenna port may correspond to a beam; similarly, the receiver only needs to treat this beam as an interface and does not need to distinguish between individual elements.

[0129] Channel information: Measurement information refers to information about the path and / or the measured channel obtained by the device through channel measurements.

[0130] The channel information refers to channel-related information between the first device and the second device, such as at least one of channel state information, channel precoding information, beam information, beam angle information, beam power information, beam indication information, channel feature vector, channel eigenvalue, channel amplitude information, or channel phase information. The channel involved in this application can be an uplink channel, downlink channel, or sidelink channel, etc., and is not limited thereto.

[0131] Channel state information indicates the state of the channel. Channel precoding information indicates the precoding matrix of the channel, etc. Beam information indicates the beam used for transmitting or receiving signals, such as including the beam index. Beam angle information includes, for example, at least one of beam pointing, beamwidth, or beamforming method. Beam pointing includes, for example, the direction of the main lobe formed by beamforming. Beamwidth refers to the degree to which the main lobe formed by beamforming is broadened in space. Beamforming method refers to the method of beamforming, such as numerical methods, etc. Beam power information indicates the power of the beam. Beam indication information refers to the parameters required for beamforming. The channel eigenvector is a vector used to represent the transmission characteristics of the channel. The channel eigenvalue refers to the eigenvalue of the channel matrix. Channel amplitude information refers to the amplitude changes of the signal during transmission. Channel phase information refers to the phase changes of the signal during transmission.

[0132] In this application, a time-frequency point can refer to a RE, and thus one time-frequency point is one RE. Specifically, one time-frequency point can be regarded as an RE determined by one symbol and one subcarrier. Alternatively, one time-frequency point can also be regarded as an RB. This application does not limit the size and representation of the first time-frequency point.

[0133] The above description of the terminology is for ease of understanding only and does not limit the scope of protection of the embodiments of this application.

[0134] The technical solution of this application is described below with reference to specific embodiments.

[0135] Figure 2 This is a schematic diagram of one embodiment of the time-frequency resource determination method according to this application. Please refer to... Figure 2 The methods include:

[0136] 201. The first device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal.

[0137] The first channel is the channel between the first device and the second device; it can also be called a sparse channel. A reference signal is used to measure the first channel.

[0138] The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device. The MPC may include at least one of DoD, DoA, power, elevation angle, azimuth angle, or time delay. DoD refers to the angle at which the path originates from the transmitter, including the horizontal (also known as azimuth) departure angle and the vertical (also known as elevation) departure angle. DoA refers to the angle at which the path arrives at the receiver, including the horizontal (also known as azimuth) arrival angle and the vertical (also known as elevation) arrival angle. Time delay refers to the time consumed from transmission at the transmitter to reception at the receiver, also known as the time of flight.

[0139] Optionally, the first time-frequency domain feedback dimension offset is the change in the time-frequency domain dimension used to feed back channel information of the first channel. For example, the first time-frequency domain feedback dimension offset is the feedback dimension added or reduced in the time-frequency domain based on the basic time-frequency domain feedback dimension. The first density offset is the change in the time-frequency points occupied by the transmitted reference signal at each transmit antenna port. For example, the first density offset is the number of time-frequency points occupied by the transmitted reference signal added or reduced at each transmit antenna port based on the basic density. The basic time-frequency domain feedback dimension is the fundamental time-frequency domain feedback dimension used to feed back channel information of the first channel. It can be understood that the basic time-frequency domain feedback dimension is the time-frequency domain feedback dimension that the communication system specifies, pre-requires, or predefined at least needs to feed back channel information of the first channel. For example, the basic time-frequency domain feedback dimension can be determined based on the MPC between the first device and the second device; the specific determination process can be found in the following text. Figure 3 The relevant introduction is as follows. The basic density is the fundamental number of time-frequency points occupied by each transmit antenna port for transmitting the reference signal. It can be understood as the minimum number of time-frequency points required or predefined by the communication system for each transmit antenna port to transmit the reference signal. The basic time-frequency domain feedback dimension includes both time-domain and frequency-domain feedback dimensions. It should be noted that the feedback dimension used to feed back channel information for the first channel also includes a spatial domain feedback dimension, which includes the transmit antenna feedback dimension and / or the receive antenna feedback dimension. Optionally, in this paper, the spatial domain feedback dimension used to feed back channel information for the first channel may not be changed.

[0140] The first time-frequency domain feedback dimension bias can also be called the first time-frequency domain feedback dimension redundancy, or other names, which are not limited in this application. The first density bias can also be called the first density redundancy, or other names, which are not limited in this application.

[0141] The following describes some possible implementations of step 201. Other implementations are still applicable to this application, and this application does not limit them.

[0142] Implementation Method 1: The first device performs performance testing based on the basic time-frequency domain feedback dimension of the first channel according to the MPC and the performance requirement information of the communication system in which the first device and the second device are located, in order to determine the first time-frequency domain feedback dimension bias, and / or, the first device performs performance testing based on the basic density of the reference signal according to the MPC and the performance requirement information, in order to determine the first density bias of the reference signal.

[0143] Optionally, the performance requirements information may include at least one of the following: the signal-to-noise ratio (SNR) between the first and second devices, the channel cosine similarity, the normalized mean square error, or the throughput requirements of the communication system.

[0144] The following describes two possible implementations of the first device acquiring MPC. Other implementations are also applicable to this application, and this application does not limit the specific method by which the first device acquires MPC.

[0145] Implementation Method 1: The first device can obtain the MPC based on a radio map. A radio map is a map used to display the coverage area and signal strength distribution of wireless signals, which can reflect the parameter values ​​of each location point of the first device in the wireless network.

[0146] Method 2: The first device can obtain MPC based on ray tracing technology.

[0147] The following describes one possible implementation of the first device determining the first time-frequency domain feedback dimension bias and / or the first density bias. Other implementations are also applicable to this application, and this application does not limit the specific implementation.

[0148] Optionally, the first device acquires two channel estimates, namely... and and This is related to the MPC between the first device and the second device, respectively. For example, this... The two channel estimates can be obtained by the first device using deterministic information in the MPC, the time-frequency domain conversion module, and a set of random phases to estimate the channel at the current or previous time step. The first device can utilize the deterministic information in the MPC, the time-frequency domain conversion module, and another set of random phases to obtain the channel estimate for the current or previous time step. The first device utilizes the basic time-frequency domain feedback dimension... right Perform phase correction to obtain Channel estimates The first device according to and The cosine similarity of the channel is calculated. If the cosine similarity is greater than or equal to a first threshold, the first device determines that the time-frequency domain feedback dimension bias is 0; if the cosine similarity is less than the first threshold, the first device increases the time-frequency domain feedback dimension. This process is repeated until the calculated cosine similarity is greater than or equal to the first threshold, at which point the first device determines the first time-frequency domain feedback dimension bias. The first device obtains the channel matrix based on the fundamental density simulation channel estimation. Channel estimates Among them, the channel matrix and and and with Associated with the same MPC. For example, the channel matrix. This could be an estimate of the channel at the current or previous moment obtained by the first device using the deterministic information in the MPC, the time-frequency domain conversion module, and the random phase. The first device then uses the channel matrix... and channel estimates Calculate the channel cosine similarity. If the channel cosine similarity is greater than or equal to a first threshold, the first device can determine the density bias as 0; if the channel cosine similarity is less than the first threshold, the first device can increase the base density. This process is repeated until the calculated channel cosine similarity is greater than or equal to the first threshold, at which point the first device can determine the first density bias.

[0149] The following is combined Figure 3 The illustrated embodiment describes one possible implementation of the first device determining the fundamental time-frequency spatial domain feedback dimension. The fundamental time-frequency spatial domain feedback dimension includes: a spatial domain feedback dimension, a time domain feedback dimension, and a frequency domain feedback dimension. Other implementations are also applicable to this application, and no specific limitation is made herein.

[0150] 301. The first device determines the amount of parameters to be acquired based on the MPC.

[0151] The parameter to be acquired can be the phase. This application does not limit the specific form of the parameter to be acquired.

[0152] 302. The first device determines the basic time-frequency spatial domain feedback dimension based on the parameters to be acquired.

[0153] As an example, the first device determines the parameter quantity N to be acquired based on the MPC, including: the first device determines the number of diameters N based on the MPC. path The number of parameters N to be obtained satisfies: N = nN path n and N pathAll values ​​are positive integers, where n represents the number of parameters to be estimated on each path. This is particularly useful when the fundamental time-frequency spatial domain feedback dimension equals the number of parameters to be acquired, ensuring the lowest possible fundamental time-frequency spatial domain feedback dimension and pilot overhead. For example, n = 4 means one path corresponds to 4 parameters to be acquired, or one path corresponds to 4 random phases.

[0154] It is understandable that the basic time-frequency spatial domain feedback dimension is greater than or equal to the number of parameters to be acquired.

[0155] Optional, Figure 3 The illustrated embodiment also includes step 302a. Step 302a may be performed before step 302.

[0156] 302a. The second device sends the transmit antenna dimension or the receive antenna dimension to the first device.

[0157] It should be noted that if the second device acts as the transmitter of the reference signal, then the second device sends the transmitting antenna dimension to the first device. If the second device acts as the receiver of the reference signal, then the second device sends the receiving antenna dimension to the first device.

[0158] Optionally, step 302 above specifically includes: the first device determining the basic time-frequency spatial domain feedback dimension based on the transmitting antenna dimension or receiving antenna dimension and the amount of parameters to be acquired.

[0159] As an example, the first device can first compress the spatial domain to obtain the spatial feedback dimension. For example, this includes the transmit antenna feedback dimension and the receive antenna feedback dimension. The first device then adjusts the time-domain feedback dimension and the frequency-domain feedback dimension to ensure that the obtained basic time-frequency spatial feedback dimension is greater than the number of parameters N to be acquired. For example... or, This ensures that the random phase corresponding to each path has a unique solution. Among these, Indicates the time-domain feedback dimension. Indicates the frequency domain feedback dimension. Indicates the dimension of the receiving antenna feedback. This indicates the feedback dimension of the transmitting antenna.

[0160] Optional, if The first device can then adjust the time-domain feedback dimension and the frequency-domain feedback dimension, so that... This yields the basic time-frequency domain feedback dimension. The amount of time-frequency resources can be referenced during the adjustment process. For broadband systems, the first device can prioritize compressing the time domain and setting... For narrowband systems, frequency domain compression can be prioritized, and settings can be adjusted accordingly.

[0161] It should be noted that the above explanation is based on the example of first compressing the spatial domain and then compressing the time and frequency domain, and is mainly applicable to broadband systems.

[0162] For example, the spatial feedback dimension, such as the transmit (receive) antenna feedback dimension. It can satisfy any of the following:

[0163]

[0164] or,

[0165]

[0166] Wherein, N represents the number of parameters to be acquired, and the The channel matrix is ​​represented by the MPC, the parameters to be acquired, and the time-frequency domain conversion module. The rank of the channel matrix is ​​represented by the following: The eigenvalues ​​of the channel matrix are represented by 'Threshold', 'min{}' represents the minimum value function. Z represents the number of eigenvalues ​​in the channel matrix that are greater than a preset threshold, i.e., the number of strong currents. Z in either formula 1 or formula 2 above satisfies any of the following conditions: or,

[0167] Optionally, the preset threshold Threshold can be configured or fed back in real time by standard specifications, vendor pre-configuration, higher-layer signaling (e.g., RRC), or equipment (e.g., network side or terminal side), without limitation.

[0168] Optional, channel matrix This is obtained based on MPC, the parameters to be acquired, and the time-frequency domain conversion module. Here, the parameters to be acquired can be randomly set phase values. For example, if a multiple-input multiple-output (MIMO) system includes N1 transmit antenna ports and N2 receive antenna ports, and the antenna array is arranged on a plane, the channel matrix... It can be a two-dimensional matrix of size N² × N¹. In the two-dimensional channel matrix, rows correspond to receiving antennas, columns correspond to transmitting antennas, and the elements in the matrix can be denoted as h. ij h ij Let represent the channel response from the i-th transmit antenna to the j-th receive antenna. In some cases, the channel matrix may be sparse, meaning only a few elements are non-zero. This is common in multipath environments, as the signal may propagate through only a few significant paths.

[0169] Optionally, the time-frequency domain conversion module can convert MPC into channel state information (CSI). This time-frequency domain conversion module can be implemented using mathematical models, simulation models, AI models, or other methods.

[0170] In other words, the first device can select the rank of the channel. As a spatial feedback dimension (or the minimum compressible value of the spatial domain), or alternatively, the number of strong currents can be chosen. As the spatial feedback dimension (or the minimum compressible value of the spatial domain).

[0171] For example, the first device, based on the fundamental time-frequency spatial domain feedback dimensions determined by MPC, includes: a time-domain feedback dimension of 8 time-frequency points and 5 transmit antenna ports. The time-domain feedback dimension can be 4 and the frequency-domain feedback dimension can be 2, or vice versa, etc., without limitation.

[0172] Optionally, the base density can be configured by the communication system, indicated by the network equipment, or specified by the communication protocol. For example, the base density can be 1 or 2.

[0173] Implementation Method 2: The first device determines the first time-frequency domain feedback dimension bias and / or the first density bias corresponding to the MPC between the first device and the second device and the performance requirement information of the communication system where the first device is located, based on the first mapping relationship.

[0174] The first mapping relationship includes the mapping relationship between MPC and performance requirement information and the time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias. For information on performance requirement information, please refer to the aforementioned introduction; it will not be repeated here.

[0175] For example, the first mapping relationship can be represented as shown in Table 1:

[0176] Table 1

[0177]

[0178] As shown in Table 1, the first device can determine the corresponding first time-frequency domain feedback dimension bias and / or first density bias based on Table 1 and the MPC and SNR between the first device and the second device. For example, if the MPC is MPC1 and the SNR is 10, then the first time-frequency domain feedback dimension bias is b1 and the first density bias is c1.

[0179] Optionally, the first time-frequency domain feedback dimension bias can be determined by the first time-domain feedback dimension bias and the first frequency-domain feedback dimension bias. The first density bias can be determined by the first time-domain density bias and the first frequency-domain density bias. For example, the first mapping relationship can be represented as shown in Table 2:

[0180] Table 2

[0181]

[0182] As shown in Table 2, the first device can determine the corresponding first time-domain feedback dimension bias, first frequency-domain feedback dimension bias, first time-domain density bias, and first frequency-domain density bias based on Table 2 and the MPC and SNR between the first and second devices. For example, if the MPC is MPC1 and the SNR is 15, the corresponding time-domain feedback dimension is a, the corresponding frequency-domain feedback dimension is d, the corresponding time-domain density bias is e, and the corresponding frequency-domain density bias is e. Therefore, the first time-frequency domain feedback dimension bias is a*d, and the first density bias is e*e.

[0183] It should be noted that each row in Tables 1 and 2 above may also include a row ID. For example, the first mapping relationship can also be represented as shown in Table 3 below:

[0184] Table 3

[0185]

[0186] It should be noted that if the above table includes only one row, the table may not include the row ID, but the table has a corresponding table ID. Different tables represent: the mapping relationship between the time-frequency domain feedback dimension bias corresponding to different MPC and performance requirement information, and / or the mapping relationship between different MPC and performance requirement information and density bias.

[0187] It should be noted that the first mapping relationship is predefined, or pre-configured by the manufacturer, or specified by the standard, or configured by the network device; this application does not specify the specifics.

[0188] Implementation Method 3: The first device receives first information from the second device. The first information is used to indicate the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal.

[0189] In this implementation, the second device can obtain the MPC (Multi-Level Comparison) between the first and second devices and the performance requirement information between them. Specifically, the second device obtains the MPC in a similar manner to the first device, as described above. The second device determines the first time-frequency domain feedback dimension bias and / or the first density bias based on the MPC and performance requirement information. This determination is similar to the process in step 601 where the first device determines the first time-frequency domain feedback dimension bias and / or the first density bias, as described above. Then, the second device sends the first information to the first device.

[0190] Therefore, it can be seen that the first or second device determines the first time-frequency domain feedback dimension offset and / or the first density offset by combining MPC and performance requirement information. This is beneficial for determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. For example, if the first time-frequency domain feedback dimension offset and / or first density offset are determined solely by MPC, then the first time-frequency domain feedback dimension offset is 0, and the first density offset is 0. If the first time-frequency domain feedback dimension offset and / or first density offset are determined by MPC and performance requirement information, it can be ensured that the first time-frequency domain feedback dimension offset and / or first density offset are minimized, and that the first time-frequency domain feedback dimension offset and / or first density offset can meet the performance requirements of the communication system. This is beneficial for reducing the overhead of channel measurement and feedback. Furthermore, the first device determines the first time-frequency resource by combining the first time-frequency domain feedback dimension offset and / or determines the second time-frequency resource by combining the first density offset of the reference signal. This realizes the consideration of the influence of non-ideal factors through the first time-frequency domain feedback dimension offset and / or the first density offset, which is beneficial to the robustness of channel measurement under non-ideal factors and improves the performance of channel measurement.

[0191] It should be noted that, optionally, before step 201 above, the first device sends at least one of the following to the second device: the method for determining the first time-frequency domain feedback dimension offset (e.g., determined by performance testing or by a first mapping relationship), the method for determining the first density offset (e.g., determined by performance testing or by a first mapping relationship), indicators in the performance requirement information (e.g., the cosine similarity of the channel, or the throughput of the communication system), an indication of whether to perform performance testing of the time-frequency domain feedback dimension, an indication of whether to perform density performance testing of the reference signal, a test execution mode (e.g., performance testing performed by the first device or by the second device), an indication of the method for determining the first time-frequency resource and the first transmit antenna port (e.g., random selection, uniform selection, selection from a preset set), or the first mapping relationship. This enables pre-configuration or alignment of the above information between the first and second devices.

[0192] 202. The first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or, the first device determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal.

[0193] The following describes some possible implementations of the first device determining the first time-frequency resource used for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset. Other implementations are still applicable to this application, and this application does not limit them in any specific way.

[0194] Implementation Method 1: The first device determines the total time-frequency domain feedback dimension based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset. Then, the first device randomly selects K first time-frequency points from the pre-allocated time-frequency resources based on the total time-frequency domain feedback dimension. K is an integer greater than or equal to 1. That is, the first time-frequency resources include these K first time-frequency points.

[0195] The pre-allocated time-frequency resources can be system time-frequency resources or raw time-frequency resources. Pre-allocated time-frequency resources can be a set of resources, including one or more time-frequency points.

[0196] Optionally, the first device randomly selects Q first transmit antenna ports and / or X first receive antenna ports from a pre-allocated pool of antenna ports based on the spatial feedback dimension. For example, the first device randomly selects Q first transmit antenna ports from a pre-allocated pool of transmit antenna ports and X first receive antenna ports from a pre-allocated pool of receive antenna ports, i.e., a random selection method.

[0197] Implementation Method 2: The first device determines the total time-frequency domain feedback dimension based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset. The first device then selects K first time-frequency points at equal intervals from the pre-allocated time-frequency resources based on the total time-frequency domain feedback dimension. K is an integer greater than or equal to 1. That is, the first time-frequency resources include these K first time-frequency points.

[0198] The pre-allocated time-frequency resources can be system time-frequency resources. These pre-allocated resources can be a set of resources, including one or more time-frequency points. For example, the first device can select a corresponding number of time-frequency points (i.e., K first time-frequency points) from the pre-allocated time-frequency resources according to a certain sampling interval. K is an integer greater than or equal to 1. That is, the first time-frequency resources include these K first time-frequency points.

[0199] Optionally, the first device uniformly selects Q first transmit antenna ports and / or X first receive antenna ports from a pre-allocated pool of antenna ports based on the spatial feedback dimension. For example, the first device uniformly selects Q first transmit antenna ports and X first receive antenna ports from a pre-allocated pool of antenna ports, i.e., a uniform selection method. For example, the first device may select antenna ports (e.g., Q first transmit antenna ports and / or X first receive antenna ports) from the pre-allocated pool of antenna ports according to a certain sampling interval.

[0200] It should be noted that the sampling interval can be specified by the standard, pre-configured by the manufacturer, or pre-configured by higher-level signaling (e.g., RRC). Alternatively, the sampling interval set can be specified by the standard, pre-configured by the manufacturer, or pre-configured by higher-level signaling (e.g., RRC), wherein the sampling interval set includes the sampling interval.

[0201] Implementation Method 3: The first device determines the total time-frequency domain feedback dimension based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset. The first device selects K first time-frequency points from a preset time-frequency point set based on this total time-frequency domain feedback dimension. K is an integer greater than or equal to 1. That is, the first time-frequency resource includes these K first time-frequency points.

[0202] The preset time-frequency point set can be a set of system time-frequency resources, including one or more time-frequency points.

[0203] Optionally, the first device selects Q first transmit antenna ports and / or X first receive antenna ports from a preset set of antenna ports based on the spatial feedback dimension. For example, the first device selects Q first transmit antenna ports from the preset set of transmit antenna ports and X first receive antenna ports from the preset set of receive antenna ports, i.e., the selection is made from a preset set.

[0204] The preset antenna port set can be a system antenna port, an antenna port set, or an antenna port group, which includes one or more antenna ports.

[0205] The aforementioned Q first transmitting antenna ports are used to transmit reference signals. The X first receiving antenna ports are used to receive reference signals.

[0206] Optionally, the K first time-frequency points can be used to transmit reference signals. In other words, the first device determines the channel information at the K first time-frequency points that needs to be fed back during channel feedback. For example, in a downlink transmission system, the first device is a network device, and the second device is a terminal device. The network device sends reference signals to the terminal device. After completing channel measurement and estimation based on the reference signals, the terminal device also needs to send the channel information corresponding to the K first time-frequency points back to the network device. As another example, in an uplink transmission system, the first device is a terminal device, and the second device is a network device. The terminal device sends reference signals to the network device. After completing channel measurement and estimation based on the reference signals, the network device also needs to send the channel information corresponding to the K first time-frequency points back to the terminal device.

[0207] Optionally, the first device determines a first density of the reference signal based on the base density of the reference signal and a first density offset. Then, the first device determines a second time-frequency resource occupied by the reference signal based on the first density. The first density indicates the number of time-frequency points on each first transmit antenna port where the reference signal is ultimately transmitted. For example, the second time-frequency resource includes P second time-frequency points. The P second time-frequency points are used to transmit the reference signal.

[0208] Optionally, the first device further determines the airspace resources occupied by the reference signal. For example, the airspace resources include Q first transmit antenna ports. P second time-frequency points correspond to the Q first transmit antenna ports.

[0209] For example, the second time-frequency point and the first transmitting antenna port satisfy: P = Q * M, where P is the number of second time-frequency points, Q is the number of first transmitting antenna ports, and M is the first density corresponding to the first transmitting antenna port, where M is an integer greater than or equal to 1. For example, when M = 1, such as M = 1, Q = 5, P = 5, it means that each first transmitting antenna port occupies one second time-frequency point for transmitting the reference signal, that is, one first transmitting antenna port corresponds to one second time-frequency point. As another example, when M is greater than 1, such as M = 2, Q = 5, P = 10, it means that each first transmitting antenna port occupies two second time-frequency points for transmitting the reference signal, that is, each first transmitting antenna port corresponds to two second time-frequency points. This can be understood as the first device transmitting or receiving reference signals at two different second time-frequency points through one antenna port. In other words, the first density indicates the number of second time-frequency points on each first transmitting antenna port that transmit the reference signal.

[0210] In one possible implementation, the first device determines the second time-frequency resource occupied by the reference signal based on the first density and the first time-frequency resource.

[0211] Specifically, the first device determines the second time-frequency resources occupied by the reference signal based on K first time-frequency points and a first density.

[0212] Optionally, the P second time-frequency points belong to the K first time-frequency points. K is an integer greater than or equal to P, indicating that the K first time-frequency points in the total time-frequency domain feedback dimension determined above by the first device are sufficient to support (or satisfy) the transmission requirements of the reference signal. For example, the K first time-frequency points include 8 first time-frequency points with a first density of 1, and the Q first transmit antenna ports include 5 first transmit antenna ports. Therefore, it can be seen that the P second time-frequency points may include 5 first time-frequency points selected from the 8 first time-frequency points.

[0213] Optionally, the P second time-frequency points include K first time-frequency points, where P is an integer greater than K and N is an integer greater than or equal to 1. This indicates that the K first time-frequency points in the total time-frequency feedback dimension determined above by the first device are insufficient to support (or do not meet) the transmission requirements of the reference signal, and M third time-frequency points need to be added. That is, the P second time-frequency points also include M third time-frequency points. Optionally, the M third time-frequency points belong to pre-allocated time-frequency resources or a preset time-frequency point set. That is, the M third time-frequency points can be randomly or uniformly selected from the pre-allocated time-frequency resources, or the M third time-frequency points can be determined from the preset time-frequency point set, without limitation. For example, the K first time-frequency points include 8 first time-frequency points with a first density of 2, and the Q first transmit antenna ports include 5 first transmit antenna ports. Therefore, it can be known that the P second time-frequency points include the 8 first time-frequency points and the 2 additionally selected third time-frequency points.

[0214] In another possible implementation, the first device determines P second time-frequency points from pre-allocated time-frequency resources based on a first density.

[0215] In this implementation, the first device can select P second time-frequency points from pre-allocated time-frequency resources or a preset set of time-frequency points. Please refer to the foregoing description of pre-allocated time-frequency resources. For example, the first device can randomly select P second time-frequency points from the pre-allocated time-frequency resources. Alternatively, the first device can select P second time-frequency points at equal intervals from the pre-allocated time-frequency resources.

[0216] In another possible implementation, the first device determines P second time-frequency points from a preset set of time-frequency points based on the first density.

[0217] Please refer to the aforementioned introduction for information on the preset time-frequency point set; it will not be repeated here.

[0218] Optionally, the first device indicates the first time-frequency resource and / or the second time-frequency resource to the second device. This ensures that the time-frequency resources occupied by the synchronization reference signal between the first and second devices are allocated. Two possible implementation methods are described below. Other implementation methods are also applicable to this application, and no specific limitation is made herein.

[0219] The following section describes implementation method 1 in conjunction with step 203. Optional, Figure 2 The illustrated embodiment also includes step 203. Step 203 may be performed after step 202.

[0220] 203. The first device sends second information to the second device. Correspondingly, the second device receives the second information from the first device.

[0221] The second information indicates the first time-frequency resources used for feedback of channel information of the first channel, and / or the second time-frequency resources occupied by the reference signal. That is, the second information indicates K first time-frequency points used for feedback of channel information of the first channel and / or P second time-frequency points occupied by the reference signal.

[0222] Optionally, the second information may also indicate the spatial resources used for feeding back channel information of the first channel, and / or the spatial resources occupied by the reference signal. For example, the second information may indicate Q first transmit antenna ports and / or X first receive antenna ports.

[0223] It should be noted that the information indicated by the second piece of information mentioned above can also be indicated by different pieces of information, and this application does not limit the specific information.

[0224] The following section describes implementation method 2 in conjunction with steps 204 to 206. Optional, Figure 2 The illustrated embodiment also includes steps 204 to 206. Steps 204 to 206 may be performed after step 202.

[0225] 204. The first device determines the basic time-frequency resources used to feed back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel, and / or determines the basic time-frequency resources occupied by the reference signal based on the basic density of the reference signal.

[0226] For example, the basic time-frequency resources used to feed back channel information for the first channel may include the first S first time-frequency points out of K first time-frequency points, or the last S first time-frequency points out of K first time-frequency points, or any S first time-frequency points out of K first time-frequency points. S is an integer greater than or equal to 1 and less than K.

[0227] For example, the basic time-frequency resources occupied by the reference signal may include the first L second time-frequency points out of P second time-frequency points, or the last L second time-frequency points out of P second time-frequency points, or any L second time-frequency points out of P second time-frequency points. L is an integer greater than or equal to 1 and less than P.

[0228] Optionally, the first device may also determine the spatial resources used for feeding back channel information of the first channel based on the spatial feedback dimension, and / or determine the spatial resources occupied by the reference signal based on the fundamental density of the reference signal. For example, the spatial resources used for feeding back channel information of the first channel include Q first transmit antenna ports and / or X first receive antenna ports. The spatial resources occupied by the reference signal include Q first transmit antenna ports.

[0229] 205. The first device determines the bias time-frequency resources used to feed back channel information of the first channel based on the first time-frequency domain feedback dimension bias, and / or, the first device determines the bias time-frequency resources occupied by the reference signal based on the density bias.

[0230] The offset time-frequency resources used to feed back channel information of the first channel can be time-frequency resources other than the basic time-frequency resources used to feed back channel information of the first channel. For example, the basic time-frequency resources used to feed back channel information of the first channel may include the first S first time-frequency points out of K first time-frequency points, and the offset time-frequency resources used to feed back channel information of the first channel may include the other first time-frequency points out of the K first time-frequency points. As another example, the basic time-frequency resources used to feed back channel information of the first channel may include the last S first time-frequency points out of K first time-frequency points, and the offset time-frequency resources used to feed back channel information of the first channel may include the other first time-frequency points out of the K first time-frequency points. As yet another example, the basic time-frequency resources used to feed back channel information of the first channel may include any S first time-frequency points out of K first time-frequency points, and the offset time-frequency resources used to feed back channel information of the first channel may include the other first time-frequency points out of the K first time-frequency points.

[0231] The offset time-frequency resources occupied by the reference signal can be any time-frequency resources in the second time-frequency resources other than the basic time-frequency resources occupied by the reference signal. For example, the basic time-frequency resources occupied by the reference signal can include the first L second time-frequency points out of P second time-frequency points, and the offset time-frequency resources occupied by the reference signal include the second time-frequency points other than the first L second time-frequency points out of P second time-frequency points. As another example, the basic time-frequency resources occupied by the reference signal can include the last L second time-frequency points out of P second time-frequency points, and the offset time-frequency resources occupied by the reference signal include the second time-frequency points other than the last L second time-frequency points out of P second time-frequency points. Yet another example, the basic time-frequency resources occupied by the reference signal can include any L second time-frequency points out of P second time-frequency points, and the offset time-frequency resources occupied by the reference signal include the second time-frequency points other than the any L second time-frequency points out of P second time-frequency points.

[0232] 206. The first device sends third information to the second device. Correspondingly, the second device receives the third information from the first device.

[0233] The third information is used to indicate at least one of the following: the basic time-frequency resources used to feed back channel information of the first channel, the basic time-frequency resources occupied by the reference signal, the offset time-frequency resources used to feed back channel information of the first channel, or the offset time-frequency resources occupied by the reference signal.

[0234] Optionally, the third information may also indicate at least one of the following: spatial resources used for feeding back channel information of the first channel, or spatial resources occupied by a reference signal. For example, the third information may indicate Q first transmit antenna ports and / or X first receive antenna ports.

[0235] In this application, optionally, the first device can update the first time-frequency domain feedback dimension bias and / or the first density bias. Several possible update scenarios are described below. This application still applies to other update scenarios, and no specific limitations are imposed by this application.

[0236] The following section describes Scenario 1 in conjunction with steps 207 and 208. Optional, Figure 2 The illustrated embodiment also includes steps 207 to 208. Steps 207 to 208 may be performed after step 202.

[0237] 207. The second device sends a first request to the first device. Accordingly, the first device receives the first request from the second device.

[0238] The first request is used to request updates to the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. Optionally, the first request includes at least one of the following: updating MPC between the first device and the second device, or updating performance requirement information.

[0239] For example, if the second device detects a change in the MPC between the first and second devices and / or the performance requirement information (e.g., SNR) between the first and second devices, the second device may request the first device to update the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal.

[0240] 208. The first device updates the first time-frequency domain feedback dimension bias and / or updates the first density bias to obtain the updated first time-frequency domain feedback dimension bias and / or the updated first density bias.

[0241] The following describes some possible implementations of step 208. Other implementations are still applicable to this application, and this application does not limit them.

[0242] Implementation Method 1: The first device acquires updated MPC and / or updated performance requirement information. Based on the updated MPC and / or updated performance requirement information, the first device performs performance testing on the basic time-frequency domain feedback dimension to obtain an updated first time-frequency domain feedback dimension bias, and / or, based on the updated MPC and / or updated performance requirement information, the first device performs performance testing on the basic density to obtain an updated first density bias.

[0243] This implementation method is similar to the first implementation method in step 201 above. For details, please refer to the relevant introduction of the first implementation method in step 201 above. It will not be repeated here.

[0244] Implementation Method 2: The first device acquires updated MPC and / or updated performance requirement information. The first device determines the second time-frequency domain feedback dimension bias and / or the second density bias that commonly correspond to the updated MPC and / or updated performance requirement information based on the first mapping relationship. The first device uses the second time-frequency domain feedback dimension bias as the updated first time-frequency domain feedback dimension bias, and / or uses the second density bias as the updated first density bias.

[0245] This implementation method is similar to the second implementation method in step 201 above. For details, please refer to the relevant introduction of the second implementation method in step 201 above. It will not be repeated here.

[0246] Implementation method 3: The first device receives an updated first time-frequency domain feedback dimension bias and / or an updated first density bias from the second device.

[0247] The process by which the second device determines the updated first time-frequency domain feedback dimension bias and / or the updated first density bias is similar to the process by which the first device determines the updated first time-frequency domain feedback dimension bias and / or the updated first density bias as shown in the aforementioned implementation methods one and two, and will not be repeated here.

[0248] It should be noted that this is optional, if Figure 2 The illustrated embodiment further includes step 203, then steps 207 to 208 can be performed after step 203. Optionally, if Figure 2 The illustrated embodiment also includes steps 204 to 206, and steps 207 to 208 can be performed after step 206.

[0249] Scenario 2 will be described below with reference to steps 209 to 211. Optional, Figure 2 The illustrated embodiment also includes steps 209 to 211. Steps 209 to 211 may be performed after step 202.

[0250] 209. The first device sends a first instruction to the second device. Correspondingly, the second device receives the first instruction from the first device.

[0251] The first indication is used to indicate the update of the first time-frequency domain feedback dimension bias and / or the first density bias.

[0252] For example, when the first device detects a change in MPC and / or a change in the performance requirements information of the communication system, the first device may send a first instruction to the second device to instruct the first time-frequency domain feedback dimension bias and / or the first density bias to be updated.

[0253] 210. The second device sends to the first device the update MPC between the first and second devices and / or the update performance requirement information of the communication system between the first and second devices. Correspondingly, the first device receives the update MPC between the first and second devices and / or the update performance requirement information of the communication system between the first and second devices from the second device.

[0254] 211. The first device determines the second time-frequency domain feedback dimension bias and / or the corresponding second density bias corresponding to the updated MPC and updated performance requirement information according to the first mapping relationship, and uses the second time-frequency domain feedback dimension bias as the updated first time-frequency domain feedback dimension bias, and / or uses the second density bias as the updated first density bias.

[0255] This implementation method is similar to the second implementation method in step 201 above. For details, please refer to the relevant introduction of the second implementation method in step 201 above. It will not be repeated here.

[0256] It should be noted that step 211 above only illustrates one implementation of the first device determining the updated first time-frequency domain feedback dimension bias and / or the updated first density bias. In practical applications, the first device can also determine the updated first time-frequency domain feedback dimension bias and / or the updated first density bias in other ways. For example, the first device may perform performance testing based on the basic time-frequency domain feedback dimension according to the updated MPC and / or updated performance requirement information to obtain the updated first time-frequency domain feedback dimension bias, and / or the first device may perform performance testing based on the basic density according to the updated MPC and / or updated performance requirement information to obtain the updated first density bias.

[0257] It should be noted that this is optional, if Figure 2 The illustrated embodiment further includes step 203, then steps 209 to 211 can be performed after step 203. Optionally, if Figure 2 The illustrated embodiment also includes steps 204 to 206, and steps 209 to 211 may be performed after step 206.

[0258] Scenario 3 will be described below in conjunction with steps 212 to 214. Optional, Figure 2The illustrated embodiment also includes steps 212 to 214. Steps 212 to 214 may be performed after step 202.

[0259] 212. The second device sends a second request to the first device. Accordingly, the first device receives the second request from the second device.

[0260] The second request is used to request updates to the first time-frequency domain feedback dimension bias and / or the first density bias. Optionally, the second request includes at least one of the following: updating MPC between the first device and the second device, or updating performance requirement information.

[0261] 213. The first device sends a second instruction to the second device. Accordingly, the first device receives the second instruction from the second device.

[0262] The second indication is used to indicate that the first time-frequency domain feedback dimension bias and / or the first density bias are maintained.

[0263] For example, after receiving a second request from a second device, the first device, in conjunction with multiple update instructions sent by the first device, decides to maintain the first time-frequency domain feedback dimension bias and / or the first density bias. The first device then sends the second instruction to the second device.

[0264] It should be noted that this is optional, if Figure 2 The illustrated embodiment further includes step 203, then steps 212 to 213 can be performed after step 203. Optionally, if Figure 2 The illustrated embodiment also includes steps 204 to 206, and steps 212 to 213 may be performed after step 206.

[0265] In either scenario one (steps 207-208) or scenario two (steps 209-211), the first device may optionally indicate to the second device the update time-frequency resources used for feeding back channel information of the first channel, and / or the update time-frequency resources occupied by the reference signal. Two possible implementation methods are described below.

[0266] The following describes implementation method 1 in conjunction with steps 214 and 215. Optional, Figure 2 The illustrated embodiment also includes steps 214 to 215. Steps 214 to 215 may be performed after step 208 or step 211.

[0267] 214. The first device determines a third time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel and the updated first time-frequency domain feedback dimension offset, and / or, the first device determines a fourth time-frequency resource occupied by the reference signal based on the basic density of the reference signal and the updated first density offset.

[0268] Step 214 is similar to step 202 above. For details, please refer to the relevant introduction of step 202 above. It will not be repeated here.

[0269] 215. The first device sends a fourth message to the second device. Correspondingly, the second device receives the fourth message from the first device.

[0270] The fourth information is used to indicate the third time-frequency resource used to feed back channel information from the first channel, and / or the fourth time-frequency resource occupied by the reference signal.

[0271] Step 215 is similar to step 203 above. For details, please refer to the relevant introduction of step 203 above. It will not be repeated here.

[0272] The following section describes implementation method 2 in conjunction with steps 216 and 217. Optional, Figure 2 The illustrated embodiment also includes steps 216 to 217. Steps 216 to 217 may be performed after step 208 or step 211.

[0273] 216. The first device determines the updated offset time-frequency resources for feeding back channel information of the first channel based on the updated first time-frequency domain feedback dimension offset, and / or, the first device determines the updated offset time-frequency resources occupied by the reference signal based on the updated first density offset.

[0274] Step 216 is similar to step 205 above. For details, please refer to the relevant introduction of step 205 above. It will not be repeated here.

[0275] 217. The first device sends the fifth message to the second device. Correspondingly, the second device receives the fifth message from the first device.

[0276] The fifth piece of information is used to indicate the updated offset time-frequency resources used for feeding back channel information of the first channel, and / or the updated offset time-frequency resources occupied by the reference signal. Therefore, in step 217, the first device only needs to indicate the offset time-frequency resources used for feeding back channel information of the first channel, and / or the offset time-frequency resources occupied by the updated reference signal. This reduces the indication overhead.

[0277] In this embodiment, a first device determines a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device. The reference signal is used to measure the first channel, which is a channel between the first device and the second device. Then, the first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. Thus, the first device determines the first time-frequency domain feedback dimension offset of the first channel and / or the first density offset of the reference signal. The first time-frequency domain feedback dimension offset and / or the first density offset are respectively related to the MPC of the first device and the second device, thereby determining a suitable first time-frequency domain feedback dimension offset and / or first density offset. For example, this is beneficial for the first device to determine a suitable time-frequency domain feedback dimension and / or first density of the reference signal for feeding back channel information of the first channel. The first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset, and / or, the first device determines a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal. This enables the acquisition of channel information of the first channel by measuring the reference signal, which helps to reduce the overhead of channel measurement and feedback. Furthermore, the first device determines the first time-frequency resource in combination with the first time-frequency domain feedback dimension offset, and / or determines the second time-frequency resource in combination with the first density offset of the reference signal, thereby considering the influence of non-ideal factors through the first time-frequency domain feedback dimension offset and / or the first density offset, thus improving the robustness of channel measurement and feedback under non-ideal factors.

[0278] The above text combined Figure 2 The method provided in the embodiments of this application is described in detail. By prioritizing the compression of the spatial feedback dimension, a larger time-domain and / or frequency-domain feedback dimension is ensured. For example, for broadband systems, prioritizing the compression of the spatial feedback dimension during channel estimation can yield more accurate channel estimation results.

[0279] Optionally, in this application, the first device and the second device may simultaneously possess the ability to determine the time-frequency resources used for feeding back channel information of the first channel and / or to determine the time-frequency resources occupied by the reference signal. When the time-frequency resources used for feeding back channel information of the first channel determined by the first device are the same as those determined by the second device, there is no need for the first device and the second device to synchronize the time-frequency resources used for feeding back channel information of the first channel. When the time-frequency resources occupied by the reference signal determined by the first device are the same as those determined by the second device, there is no need for the first device and the second device to synchronize the time-frequency resources occupied by the reference signal.

[0280] In this application, the first device and the second device can measure the first channel using a reference signal, as described below. Figure 4 The illustrated example describes the specific implementation process.

[0281] Scenario 1: The first device is the transmitter of the reference signal, and the second device is the receiver of the reference signal. The following section will combine... Figure 4 Steps 401 to 404 in the illustrated embodiment describe the specific process of transmitting a reference signal between the first device and the second device to measure the first channel in scenario 1.

[0282] 401. The first device sends a reference signal to the second device. Correspondingly, the second device receives the reference signal from the first device.

[0283] 402. The second device performs channel measurement and channel estimation based on the reference signal to obtain the first channel measurement result.

[0284] 403. The second device sends the first channel measurement result to the first device. Correspondingly, the first device receives the first channel measurement result from the second device.

[0285] 404. The first device performs phase correction based on the first channel measurement results to obtain complete channel information.

[0286] The complete channel information includes MPC and phase.

[0287] This application does not limit the specific implementation of steps 402 to 404 above. You can refer to the relevant descriptions of existing channel measurements. For the sake of brevity, they will not be described in detail.

[0288] Scenario 2: The first device is the receiver of the reference signal, and the second device is the transmitter of the reference signal. The following section will combine... Figure 4 Steps 405 to 407 in the illustrated embodiment describe the specific process of transmitting a reference signal between the first device and the second device to measure the first channel in scenario 2.

[0289] 405. The second device sends a reference signal to the first device. Correspondingly, the first device receives the reference signal from the second device.

[0290] 406. The first device performs channel measurement and channel estimation based on the reference signal to obtain the channel measurement results.

[0291] 407. The first device performs phase correction based on the channel measurement results to obtain complete channel information.

[0292] The complete channel information includes MPC and phase.

[0293] Optionally, the first device and the second device may simultaneously possess the ability to determine the first time-frequency resource and the second time-frequency resource. For example, when the first device...

[0294] The first apparatus provided in the embodiments of this application will now be described. Please refer to... Figure 5 , Figure 5 This is a schematic diagram of the structure of a first device according to an embodiment of this application. The first device 500 can be used to perform... Figures 2 to 4 The steps performed by the first device in the illustrated embodiment are detailed in the description of the above method embodiments. The first device 500 includes a processing module 502. Optionally, the first device 500 further includes a transceiver module 501.

[0295] The processing module 502 is used for data processing. The transceiver module 501 can implement the corresponding communication functions. The transceiver module 501 can also be called a communication interface or a communication module.

[0296] Optionally, the first device 500 may further include a storage module, which can be used to store program code, program instructions and / or data. The processing module 502 can read the instructions and / or data in the storage module so that the first device 500 can implement the aforementioned method embodiments.

[0297] The first device 500 can be used to perform the actions performed by the first device in the above method embodiments. The first device 500 can be a terminal device, a network device, or a component configurable on a terminal device or a network device. The processing module 502 is used to perform processing-related operations on the first device side in the above method embodiments. The transceiver module 501 is used to perform receiving-related operations on the first device side in the above method embodiments.

[0298] Optionally, the transceiver module 501 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiments. The receiving module is used to perform the receiving operation in the above method embodiments.

[0299] It should be noted that the first device 500 may include a transmitting module but not a receiving module. Alternatively, the first device 500 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme executed by the first device 500 includes both transmitting and receiving actions. For example, the first device 500 is used to execute the above... Figures 2 to 4 The actions performed by the first device in the illustrated embodiment are shown above. For details, please refer to the above. Figures 2 to 4 The relevant descriptions in the illustrated embodiments will not be elaborated here.

[0300] For example, the first device 500 is used to execute the following scheme:

[0301] Processing module 502 is used to determine a first time-frequency domain feedback dimension offset of a first channel and / or a first density offset of a reference signal, wherein the reference signal is used to measure the first channel, the first channel being a channel between the first device 500 and the second device, and the first time-frequency domain feedback dimension offset and / or the first density offset being related to the MPC of the first device 500 and the second device, respectively; determine a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension and the first time-frequency domain feedback dimension offset of the first channel, and / or determine a second time-frequency resource occupied by the reference signal based on the basic density and the first density offset of the reference signal.

[0302] In one possible implementation, the processing module 502 is specifically used to: determine the second time-frequency resource occupied by the reference signal based on the basic density of the reference signal, the first density bias, and the first time-frequency resource.

[0303] In another possible implementation, the processing module 502 is specifically used to: perform performance testing based on the basic time-frequency domain feedback dimension of the first channel according to the performance requirement information of the communication system in which the first device 500 and the second device are located, to determine the first time-frequency domain feedback dimension bias, and / or perform performance testing based on the basic density of the reference signal according to the MPC and performance requirement information, to determine the first density bias of the reference signal.

[0304] In another possible implementation, the processing module 502 is specifically used to: determine, based on the first mapping relationship, a first time-frequency domain feedback dimension bias and / or a first density bias that corresponds to the MPC between the first device 500 and the second device and the performance requirement information of the communication system where the first device 500 is located. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias.

[0305] In another possible implementation, the processing module 502 is specifically configured to: receive first information from the second device, the first information being used to indicate the first time-frequency domain feedback dimension bias of the first channel and / or the first density bias of the reference signal.

[0306] In another possible implementation, the transceiver module 501 is further configured to: send second information to the second device, the second information being used to indicate the first time-frequency resources used for feedback of channel information of the first channel, and / or the second time-frequency resources occupied by the reference signal.

[0307] In another possible implementation, the processing module 502 is further configured to: determine the basic time-frequency resources for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel, and / or determine the basic time-frequency resources occupied by the reference signal based on the basic density of the reference signal; determine the offset time-frequency resources for feeding back channel information of the first channel based on the first time-frequency domain feedback dimension offset, and / or determine the offset time-frequency resources occupied by the reference signal based on the first density offset; the transceiver module 501 is further configured to: send third information to the second device, the third information indicating at least one of the following: the basic time-frequency resources for feeding back channel information of the first channel, the basic time-frequency resources occupied by the reference signal, the offset time-frequency resources for feeding back channel information of the first channel, or the offset time-frequency resources occupied by the reference signal.

[0308] In another possible implementation, the transceiver module 501 is further configured to: receive a first request from the second device, the first request being used to request an update of the first time-frequency domain feedback dimension offset and / or the first density offset; the processing module 502 is further configured to: update the first time-frequency domain feedback dimension offset and / or update the first density offset, thereby obtaining the updated first time-frequency domain feedback dimension offset and / or the updated first density offset.

[0309] In another possible implementation, the first request includes at least one of the following: updating MPC or updating performance requirement information between the first device 500 and the second device; the processing module 502 is specifically used to: determine the second time-frequency domain feedback dimension bias and / or the second density bias that are commonly corresponding to the updated MPC and the updated performance requirement information according to the first mapping relationship, and use the second time-frequency domain feedback dimension bias as the updated first time-frequency domain feedback dimension bias, and / or use the second density bias as the updated first density bias.

[0310] In another possible implementation, the transceiver module 501 is further configured to: send a first instruction to the second device, the first instruction being used to indicate updating the first time-frequency domain feedback dimension offset and / or the first density offset; receive update MPC between the first device 500 and the second device and update performance requirement information of the communication system in which the first device 500 and the second device reside; the processing module 502 is further configured to: determine the second time-frequency domain feedback dimension offset and / or the second density offset corresponding to both the update MPC and the update performance requirement information according to the first mapping relationship, and use the second time-frequency domain feedback dimension offset as the updated first time-frequency domain feedback dimension offset, and / or use the second density offset as the updated first density offset.

[0311] In another possible implementation, the processing module 502 is further configured to: determine a third time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel and the updated first time-frequency domain feedback dimension offset, and / or determine a fourth time-frequency resource occupied by the reference signal based on the basic density of the reference signal and the updated first density offset; the transceiver module 501 is further configured to: send fourth information to the second device, the fourth information being used to indicate the third time-frequency resource for feeding back channel information of the first channel and / or the fourth time-frequency resource occupied by the reference signal.

[0312] In another possible implementation, the processing module 502 is further configured to: determine the updated offset time-frequency resources for feeding back channel information of the first channel based on the updated first time-frequency domain feedback dimension offset, and / or determine the updated offset time-frequency resources occupied by the reference signal based on the updated first density offset; the transceiver module 501 is further configured to: send fifth information to the second device, the fifth information indicating at least one of the following: the updated offset time-frequency resources for feeding back channel information of the first channel, or the updated offset time-frequency resources occupied by the reference signal.

[0313] In another possible implementation, the transceiver module 501 is further configured to: receive a second request from the second device, the second request being for requesting an update of the first time-frequency domain feedback dimension bias and / or the first density bias; and send a second indication to the second device, the second indication being for indicating that the first time-frequency domain feedback dimension bias and / or the first density bias should be maintained.

[0314] It should be understood that the specific procedures for each module to perform the above-mentioned corresponding processes have been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0315] The processing module 502 in the above embodiments can be implemented by at least one processor or processor-related circuitry. The transceiver module 501 can be implemented by a transceiver or transceiver-related circuitry. The transceiver module 501 can also be referred to as a communication module or communication interface. The storage module can be implemented by at least one memory.

[0316] The following is a schematic diagram of the structure of a second device according to an embodiment of this application. Please refer to... Figure 6 The second device can be used to perform Figures 2 to 4 The process executed by the second device in the illustrated embodiment can be specifically referred to in the relevant descriptions of the foregoing method embodiments. The second device 600 includes a transceiver module 601 and a processing module 602.

[0317] The processing module 602 is used for data processing. The transceiver module 601 can implement the corresponding communication functions. The transceiver module 601 can also be called a communication interface or a communication module.

[0318] Optionally, the second device 600 may further include a storage module, which can be used to store program code, program instructions and / or data. The processing module 602 can read the instructions and / or data in the storage module so that the second device 600 can implement the aforementioned method embodiments.

[0319] The second device 600 can be used to perform the actions performed by the second device in the above method embodiments. The second device 600 can be a terminal device, a network device, or a component configurable on a terminal device or a network device. The processing module 602 is used to perform processing-related operations on the second device side in the above method embodiments. The transceiver module 601 is used to perform receiving-related operations on the second device side in the above method embodiments.

[0320] Optionally, the transceiver module 601 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiments. The receiving module is used to perform the receiving operation in the above method embodiments.

[0321] It should be noted that the second device 600 may include a transmitting module but not a receiving module. Alternatively, the second device 600 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme executed by the second device 600 includes both transmitting and receiving actions. For example, the second device 600 is used to execute the above... Figures 2 to 4 The actions performed by the second device in the illustrated embodiment. For details, please refer to the above. Figures 2 to 4 The relevant descriptions in the illustrated embodiments will not be elaborated here.

[0322] For example, the second device 600 is used to execute the following scheme:

[0323] The transceiver module 601 is used to receive second information from the first device. The second information is used to indicate the first time-frequency resources for feeding back channel information of the first channel, and / or the second time-frequency resources occupied by the reference signal. The first channel is the channel between the first device and the second device 600. The reference signal is used to measure the first channel.

[0324] Processing module 602 is used to determine the first time-frequency resource and / or the second time-frequency resource based on the second information.

[0325] For example, the second device 600 is used to execute the following scheme:

[0326] The transceiver module 601 is used to receive third information from the first device. The third information is used to indicate at least one of the following: basic time-frequency resources for feeding back channel information of the first channel, basic time-frequency resources occupied by the reference signal, offset time-frequency resources for feeding back channel information of the first channel, or offset time-frequency resources occupied by the reference signal. The first channel is a channel between the first device and the second device 600. The reference signal is used to measure the first channel.

[0327] The processing module 602 is used to determine at least one of the following based on the third information: the basic time-frequency resources, the offset time-frequency resources, the basic time-frequency resources occupied by the reference signal, or the offset time-frequency resources of the first channel for feedback.

[0328] For other implementation methods, please refer to the preceding text. Figures 2 to 4 The relevant descriptions in the illustrated embodiments are as follows.

[0329] It should be understood that the specific procedures for each module to perform the above-mentioned corresponding processes have been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0330] The processing module 602 in the above embodiments can be implemented by at least one processor or processor-related circuitry. The transceiver module 601 can be implemented by a transceiver or transceiver-related circuitry. The transceiver module 601 can also be referred to as a communication module or communication interface. The storage module can be implemented by at least one memory.

[0331] This application also provides an apparatus 700. Please refer to... Figure 7 The apparatus 700 includes a processor 710 coupled to a memory 720 for storing computer programs or instructions and / or data. The processor 710 is used to execute the computer programs or instructions and / or data stored in the memory 720, causing the methods in the above method embodiments to be executed. The apparatus 700 is used to implement the operations performed by the first apparatus or the second apparatus in the above method embodiments.

[0332] Optionally, the device 700 may include one or more processors 710.

[0333] Optional, such as Figure 7 As shown, the device 700 may also include a memory 720.

[0334] Optionally, the device 700 may include one or more memory 720s.

[0335] Optionally, the memory 720 can be integrated with the processor 710 or set separately.

[0336] Optional, such as Figure 7 As shown, the device 700 may further include a transceiver 730 for receiving and / or transmitting signals. For example, the processor 710 is used to control the transceiver 730 to receive and / or transmit signals.

[0337] This application also provides an apparatus 800, which may be a terminal device, a processor in the terminal device, or a chip. The apparatus 800 can be used to perform the operations performed by the first or second apparatus in the above method embodiments.

[0338] When device 800 is a terminal device Figure 8 A simplified structural diagram of a terminal device is shown. (For example...) Figure 8 As shown, the terminal device includes a processor, a memory, and a transceiver. The memory can store computer program code, and the transceiver includes a transmitter 831, a receiver 832, radio frequency circuitry (not shown in the figure), an antenna 833, and input / output devices (not shown in the figure).

[0339] The processor is mainly used to process communication protocols and communication data; control terminal devices; execute software programs; and process data from software programs.

[0340] Memory is mainly used to store software programs and data.

[0341] Radio frequency (RF) circuits are mainly used for the conversion between baseband signals and RF signals, as well as for the processing of RF signals.

[0342] Antennas are primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves.

[0343] Input / output devices can include touchscreens, displays, or keyboards. They are primarily used to receive user input and output data to the user. It should be noted that some types of terminal devices may not have input / output devices.

[0344] When data needs to be transmitted, the processor performs baseband processing on the data to be transmitted and outputs a baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits it outwards as electromagnetic waves via an antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna. The RF circuit converts the RF signal back into a baseband signal and outputs it to the processor. The processor converts the baseband signal back into data and processes that data. For ease of explanation, Figure 8Only one memory, processor, and transceiver are shown in the illustration. In actual terminal devices, there may be one or more processors and one or more memories. Memory may also be referred to as storage medium or storage device, etc. Memory may be set up independently of the processor or integrated with the processor; this application does not limit this.

[0345] In this embodiment, the antenna and radio frequency circuit with transceiver function can be regarded as the transceiver module of the terminal device, and the processor with processing function can be regarded as the processing module of the terminal device.

[0346] like Figure 8 As shown, the terminal device includes a processor 810, a memory 820, and a transceiver 830. The processor 810 can also be referred to as a processing unit, processing board, processing module, or processing device. The transceiver 830 can also be referred to as a transceiver unit, transceiver, or transceiver device.

[0347] Optionally, the device in transceiver 830 used to implement the receiving function can be considered a receiving module, and the device in transceiver 830 used to implement the transmitting function can be considered a transmitting module. That is, transceiver 830 includes a receiver and a transmitter. A transceiver may also be called a transceiver unit, transceiver module, or transceiver circuit, etc. A receiver may also be called a receiver unit, receiving module, or receiving circuit, etc. A transmitter may also be called a transmitter, transmitting module, or transmitting circuit, etc.

[0348] Processor 810 is used to perform the above Figures 2 to 4 The processing actions on the first or second device side in the illustrated embodiment. Transceiver 830 is used to perform the above-described actions. Figures 2 to 4 The transmitting and receiving operations on the first or second device side in the illustrated embodiment.

[0349] It should be understood that Figure 8 This is merely an example and not a limitation; the terminal device described above, which includes a transceiver module and a processing module, may not rely on... Figure 5 , Figure 7 or Figure 8 The structure shown.

[0350] When device 800 is a chip, the chip includes a processor, a memory, and a transceiver. The transceiver can be an input / output circuit or a communication interface. The processor can be a processing module integrated on the chip, a microprocessor, or an integrated circuit. In the above method embodiments, the transmitting operation of the first or second device can be understood as the chip's output, and the receiving operation of the first or second device in the above method embodiments can be understood as the chip's input.

[0351] This application also provides a device 900, which can be a network device or a chip. The device 900 can be used to perform the above-described... Figures 2 to 4 The operations performed by the first or second device in the illustrated embodiments.

[0352] When device 900 is a network device, such as a base station. Figure 9 A simplified schematic diagram of a base station structure is shown. The base station includes sections 910, 920, and 930.

[0353] The 910 section is mainly used for baseband processing and controlling the base station; the 910 section is usually the control center of the base station, which can be called the processor, and is used to control the base station to perform the processing operations of the first or second device in the above method embodiments.

[0354] Section 920 is primarily used to store computer program code and data.

[0355] Section 930 is primarily used for transmitting and receiving radio frequency (RF) signals, as well as converting RF signals to baseband signals. Section 930 is commonly referred to as a transceiver module, transceiver, transceiver circuit, or transceiver unit. The transceiver module of section 930, also known as a transceiver or transceiver unit, includes antenna 933 and RF circuitry (not shown in the figure), where the RF circuitry is mainly used for RF processing. Optionally, the device in section 930 that performs the receiving function can be considered a receiver, and the device that performs the transmitting function can be considered a transmitter; that is, section 930 includes receiver 932 and transmitter 931. The receiver can also be called a receiving module, receiver circuit, or receiving circuit, and the transmitter can be called a transmitting module, transmitter, or transmitting circuit.

[0356] Sections 910 and 920 may include one or more circuit boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs from the memories to implement baseband processing functions and control the base station. If multiple circuit boards exist, they can be interconnected to enhance processing capabilities. As an alternative implementation, multiple circuit boards may share one or more processors, multiple circuit boards may share one or more memories, or multiple circuit boards may simultaneously share one or more processors.

[0357] For example, in one implementation, the transceiver module of part 930 is used to perform... Figures 2 to 4 The transmit / receive related processes are performed by the first or second device in the illustrated embodiment. The processor in section 910 is used to execute... Figures 2 to 4 The processes related to the processing performed by the first or second device in the illustrated embodiments.

[0358] It should be understood that Figure 9 This is for illustrative purposes only and not as a limitation. The network devices mentioned above, including processors, memory, and transceivers, may be independent of... Figure 6 , Figure 7 or Figure 9 The structure shown.

[0359] When device 900 is a chip, the chip includes a transceiver, a memory, and a processor. The transceiver can be an input / output circuit or a communication interface; the processor can be a processor integrated on the chip, a microprocessor, or an integrated circuit. In the above method embodiments, the transmitting operation of the first or second device can be understood as the chip's output, and the receiving operation of the first or second device in the above method embodiments can be understood as the chip's input.

[0360] This application also provides a computer-readable storage medium having stored thereon computer instructions for implementing the methods executed by the first or second device in the above method embodiments.

[0361] For example, when the computer program is executed by a computer, it enables the computer to implement the method performed by the first device or the second device in the above method embodiments.

[0362] This application also provides a computer program product containing instructions that, when executed by a computer, cause the computer to perform the method described in the above method embodiments by the first device or the second device.

[0363] This application also provides a communication system, which includes a first device and a second device, the first device being used to perform, for example... Figures 2 to 4 In the illustrated embodiment, the first device performs some or all of the operations, and the second device is used to perform, for example... Figures 2 to 4 The second device performs some or all of the operations shown in the embodiments.

[0364] This application also provides a chip device, including a processor, configured to call computer programs or computer instructions stored in the memory, so that the processor executes the above-described... Figures 2 to 4 The method provided in the illustrated embodiment.

[0365] In one possible implementation, the input of the chip device corresponds to the above. Figures 2 to 4 In any of the embodiments shown, the receiving operation of the chip device corresponds to the above-described... Figures 2 to 4 The sending operation in any of the embodiments shown.

[0366] Optionally, the processor is coupled to the memory via an interface.

[0367] Optionally, the chip device may also include a memory that stores computer programs or computer instructions.

[0368] The processor mentioned above can be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more devices used to control the above. Figures 2 to 4 The illustrated embodiments provide an integrated circuit for program execution of the method provided in any of the embodiments. The memory mentioned above may be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, such as random access memory (RAM).

[0369] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the explanations and beneficial effects of the relevant contents in any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, and will not be repeated here.

[0370] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0371] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0372] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0373] If the integrated unit is implemented as 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 essential contribution of the technical solution of this application, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0374] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for determining time-frequency resources, characterized in that, The method includes: The first device determines a first time-frequency domain feedback dimension bias and / or a first density bias of a reference signal for measuring the first channel, the first channel being a channel between the first device and the second device, the first time-frequency domain feedback dimension bias and / or the first density bias being respectively related to the multipath element MPC of the first device and the second device. The first device determines a first time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel and the first time-frequency domain feedback dimension offset, and / or determines a second time-frequency resource occupied by the reference signal based on the basic density of the reference signal and the first density offset.

2. The method according to claim 1, characterized in that, The step of determining the second time-frequency resource occupied by the reference signal based on the fundamental density of the reference signal and the first density bias includes: The second time-frequency resource occupied by the reference signal is determined based on the base density of the reference signal, the first density bias, and the first time-frequency resource.

3. The method according to claim 1 or 2, characterized in that, The first device determines a first time-frequency domain feedback dimension bias of the first channel and / or a first density bias of the reference signal, including: The first device performs a performance test based on the basic time-frequency domain feedback dimension of the first channel according to the MPC and the performance requirement information of the communication system in which the first device and the second device are located, to determine the first time-frequency domain feedback dimension bias, and / or, the first device performs a performance test based on the basic density of the reference signal according to the MPC and the performance requirement information, to determine the first density bias of the reference signal.

4. The method according to claim 1 or 2, characterized in that, The first device determines a first time-frequency domain feedback dimension offset of the first channel and / or a first density offset of the reference signal, including: The first device determines, based on a first mapping relationship, a first time-frequency domain feedback dimension bias and / or a first density bias corresponding to the multipath element MPC between the first device and the second device and the performance requirement information of the communication system in which the first device is located. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias.

5. The method according to claim 1 or 2, characterized in that, The first device determines a first time-frequency domain feedback dimension offset of the first channel and / or a first density offset of the reference signal, including: The first device receives first information from the second device, the first information being used to indicate a first time-frequency domain feedback dimension bias of the first channel and / or a first density bias of the reference signal.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: The first device sends second information to the second device, the second information being used to indicate a first time-frequency resource for feeding back channel information of the first channel, and / or a second time-frequency resource occupied by the reference signal.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: The first device determines the basic time-frequency resources for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel, and / or determines the basic time-frequency resources occupied by the reference signal based on the basic density of the reference signal; The first device determines the bias time-frequency resources for feeding back channel information of the first channel based on the first time-frequency domain feedback dimension bias, and / or determines the bias time-frequency resources occupied by the reference signal based on the first density bias. The first device sends third information to the second device, the third information being used to indicate at least one of the following: basic time-frequency resources for feeding back channel information of the first channel, basic time-frequency resources occupied by the reference signal, offset time-frequency resources for feeding back channel information of the first channel, or offset time-frequency resources occupied by the reference signal.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: The first device receives a first request from the second device, the first request being used to request an update of the first time-frequency domain feedback dimension bias and / or the first density bias; The first device updates the first time-frequency domain feedback dimension bias and / or updates the first density bias to obtain the updated first time-frequency domain feedback dimension bias and / or the updated first density bias.

9. The method according to claim 8, characterized in that, The first request includes at least one of the following: updating MPC or updating performance requirement information between the first device and the second device; The first device updates the first time-frequency domain feedback dimension bias and / or updates the first density bias to obtain the updated first time-frequency domain feedback dimension bias and / or the updated first density bias, including: The first device determines the second time-frequency domain feedback dimension bias and / or the second density bias corresponding to the updated MPC and the updated performance requirement information according to the first mapping relationship, and uses the second time-frequency domain feedback dimension bias as the first time-frequency domain feedback dimension bias of the update, and / or uses the second density bias as the first density bias of the update.

10. The method according to any one of claims 1 to 7, characterized in that, The method further includes: The first device sends a first instruction to the second device, the first instruction being used to instruct the updating of the first time-frequency domain feedback dimension bias and / or the first density bias; The first device receives update MPC between the first device and the second device and update performance requirement information of the communication system between the first device and the second device from the second device; The first device determines the second time-frequency domain feedback dimension bias and / or the corresponding second density bias that are jointly corresponding to the updated MPC and the updated performance requirement information according to the first mapping relationship, and uses the second time-frequency domain feedback dimension bias as the first time-frequency domain feedback dimension bias of the update, and / or uses the second density bias as the first density bias of the update.

11. The method according to any one of claims 8 to 10, characterized in that, The method further includes: The first device determines a third time-frequency resource for feeding back channel information of the first channel based on the basic time-frequency domain feedback dimension of the first channel and the updated first time-frequency domain feedback dimension offset, and / or determines a fourth time-frequency resource occupied by the reference signal based on the basic density of the reference signal and the updated first density offset; The first device sends fourth information to the second device, the fourth information being used to indicate the third time-frequency resources used to feed back channel information of the first channel and / or the fourth time-frequency resources occupied by the reference signal.

12. The method according to any one of claims 8 to 10, characterized in that, The method further includes: The first device determines the updated offset time-frequency resources for feeding back channel information of the first channel based on the updated first time-frequency domain feedback dimension offset, and / or determines the updated offset time-frequency resources occupied by the reference signal based on the updated first density offset; The first device sends a fifth message to the second device, the fifth message indicating at least one of the following: the updated offset time-frequency resources used to feed back channel information of the first channel, or the updated offset time-frequency resources occupied by the reference signal.

13. The method according to any one of claims 1 to 7, characterized in that, The method further includes: The first device receives a second request from the second device, the second request being used to request an update of the first time-frequency domain feedback dimension bias and / or the first density bias; The first device sends a second instruction to the second device, the second instruction being used to indicate maintaining the first time-frequency domain feedback dimension bias and / or the first density bias.

14. A time-frequency resource method, characterized in that, The method includes: The second device receives second information from the first device, the second information being used to indicate a first time-frequency resource for feeding back channel information of the first channel, and / or a second time-frequency resource occupied by a reference signal, the first channel being a channel between the first device and the second device, the reference signal being used to measure the first channel; The second device determines the first time-frequency resource and / or the second time-frequency resource based on the second information.

15. A method for determining time-frequency resources, characterized in that, The method includes: The second device receives third information from the first device, the third information indicating at least one of the following: basic time-frequency resources, offset time-frequency resources, basic time-frequency resources, and offset time-frequency resources occupied by the reference signal for feeding back channel information of the first channel, the first channel being a channel between the first device and the second device, and the reference signal being used to measure the first channel; The second device determines at least one of the following based on the third information: the basic time-frequency resources, the offset time-frequency resources, the basic time-frequency resources occupied by the reference signal, or the offset time-frequency resources of the first channel for feedback.

16. The method according to claim 14 or 15, characterized in that, The method further includes: The second device determines a first time-frequency domain feedback dimension bias of the first channel and / or a first density bias of the reference signal; The second device sends first information to the first device, the first information being used to indicate the first time-frequency domain feedback dimension bias and / or the first density bias of the reference signal.

17. The method according to claim 16, characterized in that, The second device determines a first time-frequency domain feedback dimension bias of the first channel and / or a first density bias of the reference signal, including: The second device determines the multipath element MPC between the first device and the second device and the first time-frequency domain feedback dimension bias and / or the corresponding first density bias corresponding to the performance requirement information of the communication system in which the first device and the second device are located, based on the first mapping relationship. The first mapping relationship includes the mapping relationship between MPC and performance requirement information and time-frequency domain feedback dimension bias, and / or the mapping relationship between MPC and performance requirement information and density bias.

18. The method according to claim 16, characterized in that, The second device determines a first time-frequency domain feedback dimension bias of the first channel and / or a first density bias of the reference signal, including: The second device performs a performance test based on the basic time-frequency domain feedback dimension of the first channel according to the multipath element (MPC) between the first device and the second device and the performance requirement information of the communication system in which the first device and the second device are located, in order to determine the first time-frequency domain feedback dimension bias, and / or, the second device performs a performance test based on the basic density of the reference signal according to the MPC and the performance requirement information, in order to determine the first density bias of the reference signal.

19. The method according to any one of claims 14 to 18, characterized in that, The method further includes: The second device sends a first request to the first device, the first request being used to request an update of the first time-frequency domain feedback dimension bias of the first channel and / or the first density bias of the reference signal.

20. The method according to any one of claims 14 to 18, characterized in that, The method further includes: The second device receives a first instruction from the first device, the first instruction being used to instruct updating the first time-frequency domain feedback dimension bias and / or the first density bias; The second device sends to the first device the update MPC between the first device and the second device, and the update performance requirement information of the communication system in which the first device and the second device reside.

21. The method according to claim 19 or 20, characterized in that, The method further includes: The second device receives fourth information from the first device, the fourth information being used to indicate a third time-frequency resource for feeding back channel information of the first channel and / or a fourth time-frequency resource occupied by the reference signal, the third time-frequency resource being an updated time-frequency resource for feeding back channel information of the first channel, and the fourth time-frequency resource being an updated time-frequency resource occupied by the reference signal.

22. The method according to claim 19 or 20, characterized in that, The method further includes: The second device receives fifth information from the first device, the fifth information indicating at least one of the following: updated offset time-frequency resources for feeding back channel information of the first channel, and / or, updated offset time-frequency resources occupied by the reference signal.

23. The method according to any one of claims 14 to 18, characterized in that, The method further includes: The second device sends a second request to the first device, the second request being used to request an update of the first time-frequency domain feedback dimension bias of the first channel and / or the first density bias of the reference signal; The second device receives a second instruction from the first device, the second instruction indicating to maintain the first time-frequency domain feedback dimension bias and / or the first density bias.

24. An apparatus, characterized in that, It includes modules for implementing the method as described in any one of claims 1 to 13, or modules for implementing the method as described in any one of claims 14 to 23.

25. An apparatus, characterized in that, Includes a processor configured to execute post-program instructions in a computer program in memory to cause the method as described in any one of claims 1 to 13 to be performed, or to cause the method as described in any one of claims 14 to 23 to be performed.

26. The apparatus according to claim 25, characterized in that, The device further includes a memory for storing the computer program or instructions; and / or, The device further includes a communication interface coupled to the at least one processor, the communication interface being used for inputting and / or outputting information.

27. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program that, when run on a computer, causes the method as described in any one of claims 1 to 23 to be performed.

28. A computer program product, characterized in that, Includes a computer program or instructions that, when executed by a processor, cause the method as described in any one of claims 1 to 23 to be performed.

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