Communication method and related apparatus

Abstract

Disclosed in the present application are a communication method and a related apparatus. In the communication method, a terminal device can perform measurement on the basis of reference signal resources of a plurality of network devices, so as to obtain at least one of a delay deviation, a frequency deviation and a phase deviation of at least one network device relative to a reference network device, and arrange, in UCI and on the basis of an identifier corresponding to the at least one network device, the pieces of deviation information of each network device relative to the reference network device. In this way, simple and efficient reporting of delay deviations, frequency deviations and / or phase deviations of network devices is implemented.

Description

Communication method and related apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411012233.3, filed on July 25, 2024, entitled "A communication method and related apparatus", the Chinese patent application No. 202411067674.3, filed on August 5, 2024, entitled "A communication method and related apparatus", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a communication method and related apparatus. BACKGROUND

[0003] In wireless communication, under Coherent Joint Transmission (CJT), a User Equipment (UE) transmits the same data stream by multiple network devices through joint transmission, so as to realize coherent superposition of the received signal at the UE and coherent cancellation of interference, thereby improving the received Signal to Interference and noise (SINR), and further improving the network throughput and user experience. An important prerequisite for CJT is to ensure the synchronization of carrier frequency and transmission signal phase between network devices. However, in some scenarios, there is a frequency and phase deviation between different network devices that do not share a clock source station, resulting in that the signals transmitted between stations cannot be coherent in phase, and the CJT transmission effect cannot be guaranteed. At present, the UE can report the related parameters between network devices through Uplink Control Information (UCI) to assist the network devices to achieve synchronization, but how to design the UCI to enable the UE to simply and efficiently report the auxiliary parameters is a problem that needs to be solved. SUMMARY

[0004] Embodiments of the present application provide a communication method and related apparatus, which can simply and efficiently report the time delay deviation, frequency deviation and / or phase deviation of the network device by configuring the arrangement order of the related parameters in the UCI.

[0005] In a first aspect, an embodiment of the present application provides a communication method applied to a terminal device side, for example, the method can be executed by a terminal device, or executed by a module (for example, a processor, a chip, a chip system, a circuit, etc.) in the terminal device. The module can be a communication module in the terminal device, or a circuit or chip responsible for communication functions in the terminal device, such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core. Taking the method applied to the terminal device as an example, the method comprises:

[0006] receiving reference signal resources from a plurality of network devices; the reference signal resources of any one network device A in the plurality of network devices are used for the terminal device to measure deviation information of the network device A relative to a reference network device in the plurality of network devices; the deviation information includes at least one of a time delay deviation, a frequency deviation and a phase deviation;

[0007] sending uplink control information (UCI) to at least one network device; the UCI includes deviation information of the at least one network device relative to the reference network device in the plurality of network devices; the at least one network device is a network device other than the reference network device in the plurality of network devices;

[0008] wherein the deviation information of the at least one network device relative to the reference network device is arranged based on an identifier corresponding to the at least one network device.

[0009] It can be seen that in the embodiment of the present application, the terminal device can measure based on the reference signal resources of the plurality of network devices to obtain at least one of the time delay deviation, the frequency deviation and the phase deviation of the at least one network device relative to the reference network device, and arrange the above deviation information of the at least one network device relative to the reference network device in the UCI based on the identifier corresponding to the at least one network device, thereby realizing simple and efficient reporting of the time delay deviation, the frequency deviation and / or the phase deviation of the network device, and further facilitating the at least one network device to decode the time delay deviation, the frequency deviation and / or the phase deviation of itself from the UCI based on the identifier corresponding to itself, without the need to obtain the related parameters through interaction between the network devices, further reducing the complexity of the network device in obtaining these parameters.

[0010] In a possible implementation, for at least one first network device in the at least one network device that needs to measure the delay deviation, the UCI further comprises first indication information of the at least one first network device; the reference network device comprises a first reference network device; the first reference network device is a reference network device for measuring the delay deviation; and the first indication information of any first network device B in the at least one first network device is used to indicate whether the delay deviation of the first network device B relative to the first reference network device plus the delay spread is greater than or equal to the length of one cyclic prefix.

[0011] In the implementation, the first indication information of each first network device is arranged adjacent to the delay deviation of each first network device relative to the first reference network device; or

[0012] The first indication information of the at least one first network device is arranged based on the corresponding identifier of the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the deviation information in the UCI.

[0013] In the implementation, for the first network device that needs to report the delay deviation, the terminal device can arrange the first indication information adjacent to the delay deviation (for example, as a part or a bit segment of the UCI) in the UCI, or the terminal device can arrange all the first indication information of the first network device in the UCI first, and then arrange the deviation information of the at least one network device relative to the reference network device, which is relatively flexible and has low complexity.

[0014] In a possible implementation, the UCI further comprises second indication information; the second indication information is used to indicate the first reference network device; and the second indication information is arranged in priority to the first indication information of the at least one first network device and the deviation information of the at least one network device relative to the reference network device.

[0015] In the implementation, the terminal device reports the second indication information of the first reference network device for measuring the delay deviation in the UCI in priority, so as to indicate the first reference network device to the at least one network device, thereby facilitating the at least one network device to determine the reference network device for measuring the delay deviation.

[0016] In a possible implementation, in a case where the at least one first network device comprises a target first network device that needs to measure the frequency deviation and / or the phase deviation, and / or in a case where the at least one network device comprises a second network device that only needs to measure the frequency deviation and / or the phase deviation, the reference network device further comprises a second reference network device; the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation.

[0017] The UCI further includes third indication information, and the third indication information is used to indicate the second reference network device.

[0018] In the implementation, for the scenario that the at least one network device needs to jointly report the time delay deviation information, the frequency deviation information (and / or the phase deviation information), the terminal device preferentially reports, in the UCI, the second indication information of the first reference network device for measuring the time delay deviation and the third indication information of the second reference network device for measuring the frequency deviation (and / or the phase deviation), so as to indicate the first reference network device and the second reference network device to the at least one network device, thereby facilitating the at least one network device to explicitly determine the reference network device for measuring the time delay deviation and the reference network device for measuring the frequency deviation (and / or the phase deviation).

[0019] In a possible implementation, in the case that the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the reference network device includes the second reference network device; and the second reference network device is the reference network device for measuring the frequency deviation and / or the phase deviation.

[0020] The UCI further includes third indication information; the third indication information is used to indicate the second reference network device; and the third indication information is arranged in priority to the frequency deviation and / or the phase deviation of the at least one network device relative to the second reference network device.

[0021] In the implementation, in the scenario that the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the terminal device can preferentially report, in the UCI, the third indication information of the second reference network device for measuring the frequency deviation (and / or the phase deviation), so as to indicate the second reference network device to the at least one network device, thereby facilitating the at least one network device to explicitly determine the reference network device for measuring the frequency deviation (and / or the phase deviation).

[0022] In a possible implementation, in the case that the reference signal resource corresponding to each network device is one, the identifier corresponding to each network device is the identifier of the reference signal resource; and in the case that the reference signal resource corresponding to each network device is multiple, the identifier corresponding to each network device is the identifier of the same reference signal resource set to which the multiple reference signal resources belong.

[0023] In the implementation manner, each network device can be bound to the identifier of the reference signal resource or the identifier of the reference signal resource set sent by the network device through pre-configuration, so that the terminal device adds or arranges at least one of the time delay deviation, the frequency deviation and the phase deviation of each network device relative to the reference network device in the UCI based on the identifier of the reference signal resource or the identifier of the reference signal resource set corresponding to each network device, thereby achieving simple and efficient reporting of related parameters by the terminal device through design of the format of the UCI.

[0024] In a second aspect, the embodiments of the present application provide a communication method applied to a network device side, for example, the method can be executed by a network device or a module (such as a processor, a chip, a chip system, a circuit, etc.) in the network device. The module can be a communication module in the network device or a circuit or chip responsible for the communication function in the network device, such as a modem chip, also known as a baseband chip, or a SOC chip or SIP chip containing a modem core. Taking the method applied to the network device as an example, the method comprises:

[0025] sending a reference signal resource to a terminal device; the reference signal resource is used for the terminal device to measure deviation information of the network device relative to a reference network device in a plurality of network devices; the deviation information comprises at least one of a time delay deviation, a frequency deviation and a phase deviation; the plurality of network devices comprises the network device;

[0026] receiving uplink control information (UCI) from the terminal device; the UCI comprises deviation information of at least one network device relative to the reference network device; the at least one network device is a network device other than the reference network device in the plurality of network devices;

[0027] The deviation information of the at least one network device relative to the reference network device is arranged based on the identifier corresponding to the at least one network device.

[0028] It can be seen that, in the embodiment of the present application, the network device can send the reference signal resource to the terminal device, so that the terminal device can measure based on the reference signal resources of multiple network devices to obtain at least one of the time delay deviation, the frequency deviation and the phase deviation of at least one network device relative to the reference network device, and arrange the above deviation information of each network device relative to the reference network device in the UCI based on the identifier corresponding to the at least one network device, thereby achieving simple and efficient reporting of the time delay deviation, the frequency deviation and / or the phase deviation of the network device. In addition, the at least one network device can decode its own time delay deviation, frequency deviation and / or phase deviation from the UCI based on the identifier corresponding to itself, without the need to obtain the related parameters through interaction between network devices, thereby facilitating reduction of the complexity of the network device in obtaining these parameters. Further, the at least one network device can perform time delay compensation, frequency compensation and / or phase compensation based on the time delay deviation, the frequency deviation and / or the phase deviation decoded from the UCI, thereby facilitating improvement of the effect of CJT transmission.

[0029] In a possible implementation, for at least one first network device in the at least one network device that needs to measure the time delay deviation, the UCI further includes first indication information of the at least one first network device; the reference network device includes a first reference network device; the first reference network device is a reference network device for measuring the time delay deviation; and the first indication information of any first network device B in the at least one first network device is used to indicate whether the time delay deviation of the first network device B relative to the first reference network device plus a time delay spread is greater than or equal to the length of one cyclic prefix.

[0030] In the implementation, the first indication information of each first network device is arranged adjacent to the time delay deviation of each first network device relative to the first reference network device; or

[0031] The first indication information of the at least one first network device is arranged based on the identifier corresponding to the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the deviation information in the UCI.

[0032] In the implementation, for the first network device that needs to report the time delay deviation, the first indication information thereof can be arranged adjacent to the time delay deviation thereof in the UCI (e.g., as a part or a bit segment of the UCI), or all the first indication information of the first network device can be arranged first in the UCI, and then the deviation information of the at least one network device relative to the reference network device is arranged, so that the arrangement or reporting manner is relatively flexible and has low complexity.

[0033] In a possible implementation, the second indication information is further included in the UCI; the second indication information is used to indicate the first reference network device; and the second indication information is arranged in priority to the first indication information of the at least one first network device and the deviation information of the at least one network device relative to the reference network device.

[0034] In this implementation, the second indication information of the first reference network device used for measuring the time delay deviation is reported in priority in the UCI, so as to indicate the first reference network device to the at least one network device, thereby facilitating the at least one network device to explicitly indicate the reference network device used for measuring the time delay deviation.

[0035] In a possible implementation, in a case where the at least one first network device includes a target first network device that needs to measure the frequency deviation and / or the phase deviation, and / or in a case where the at least one network device includes a second network device that only needs to measure the frequency deviation and / or the phase deviation, the reference network device further includes a second reference network device; the second reference network device is a reference network device used for measuring the frequency deviation and / or the phase deviation.

[0036] The third indication information is further included in the UCI; the third indication information is used to indicate the second reference network device; and the third indication information is arranged in priority to the deviation information of the at least one network device relative to the reference network device.

[0037] In this implementation, for a scenario where the at least one network device needs to jointly report the time delay deviation information and the frequency deviation information (and / or the phase deviation information), the second indication information of the first reference network device used for measuring the time delay deviation and the third indication information of the second reference network device used for measuring the frequency deviation (and / or the phase deviation) are reported in priority in the UCI, so as to indicate the first reference network device and the second reference network device to the at least one network device, thereby facilitating the at least one network device to explicitly indicate the reference network device used for measuring the time delay deviation and the reference network device used for measuring the frequency deviation (and / or the phase deviation).

[0038] In a possible implementation, in a case where the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the reference network device includes a second reference network device; the second reference network device is a reference network device used for measuring the frequency deviation and / or the phase deviation.

[0039] The third indication information is further included in the UCI; the third indication information is used to indicate the second reference network device; and the third indication information is arranged in priority to the frequency deviation and / or the phase deviation of the at least one network device relative to the second reference network device.

[0040] In the scenario that the at least one network device only needs to measure the frequency offset and / or the phase offset, the third indication information of the second reference network device for measuring the frequency offset (and / or the phase offset) can be preferentially reported in the UCI, so as to indicate the second reference network device to the at least one network device, thereby facilitating the at least one network device to explicitly indicate the reference network device for measuring the frequency offset (and / or the phase offset).

[0041] In a possible implementation, when the reference signal resource corresponding to each network device is one, the identifier corresponding to each network device is the identifier of the reference signal resource; and when the reference signal resource corresponding to each network device is multiple, the identifier corresponding to each network device is the identifier of the same reference signal resource set to which the multiple reference signal resources belong.

[0042] In the implementation, each network device can be bound to the identifier of the reference signal resource or the identifier of the reference signal resource set sent by the network device through pre-configuration, so as to add or arrange at least one of the time delay offset, the frequency offset and the phase offset of each network device relative to the reference network device in the UCI based on the identifier of the reference signal resource or the identifier of the reference signal resource set corresponding to each network device, thereby achieving simple and efficient reporting of the related parameters by the terminal device through the design of the format of the UCI.

[0043] In a possible implementation, when the network device is the first network device B, the first indication information of the at least one first network device is arranged based on the identifier corresponding to the at least one first network device, and the first indication information of the at least one first network device is preferentially arranged relative to the offset information of the at least one network device relative to the reference network device, the method further includes:

[0044] decoding the sequence segment in which the first indication information of the first network device B is located in the UCI, to obtain the first indication information of the first network device B;

[0045] determining the decoding priority of the time delay offset of the first network device B relative to the first reference network device based on the first indication information of the first network device B.

[0046] In the implementation, the first network device B can first decode the first indication information to determine the decoding priority of the time delay deviation of the first network device B relative to the first reference network device. For example, in a case where the time delay deviation of the first network device B relative to the first reference network device plus the time delay extension is greater than or equal to the length of a CP, it can be determined that the decoding priority of the time delay deviation of the first network device B relative to the first reference network device is low. When the decoding priority is determined to be low, the first network device B can tolerate decoding errors of the time delay deviation of the first network device B relative to the first reference network device or select to skip decoding, thereby facilitating reduction of the complexity of decoding and the complexity of synchronization compensation of the first network device B.

[0047] In a third aspect, an embodiment of the present application provides a communication apparatus, which comprises a first transceiver unit; the first transceiver unit is configured to:

[0048] receive reference signal resources from a plurality of network devices; the reference signal resource of any one network device A in the plurality of network devices is used for a terminal device to measure deviation information of the network device A relative to a reference network device in the plurality of network devices; the deviation information comprises at least one of a time delay deviation, a frequency deviation and a phase deviation;

[0049] send uplink control information (UCI) to at least one network device; the UCI comprises the deviation information of the at least one network device relative to the reference network device in the plurality of network devices; the at least one network device is a network device other than the reference network device in the plurality of network devices;

[0050] The deviation information of the at least one network device relative to the reference network device is arranged based on the corresponding identifier of the at least one network device.

[0051] In a possible implementation, for at least one first network device in the at least one network device that needs to measure the time delay deviation, the UCI further comprises first indication information of the at least one first network device; the reference network device comprises a first reference network device; the first reference network device is a reference network device for measuring the time delay deviation; the first indication information of any one first network device B in the at least one first network device is used to indicate whether the time delay deviation of the first network device B relative to the first reference network device plus a time delay extension is greater than or equal to the length of a cyclic prefix;

[0052] The first indication information of each first network device is arranged adjacent to the time delay deviation of each first network device relative to the first reference network device; or,

[0053] The first indication information of the at least one first network device is arranged based on the corresponding identifier of the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the deviation information in the UCI.

[0054] In a possible implementation, the UCI further comprises second indication information; the second indication information is used to indicate the first reference network device; and the second indication information is arranged in priority to the first indication information of the at least one first network device and the deviation information of the at least one network device relative to the reference network device.

[0055] In a possible implementation, in a case where the at least one first network device comprises a target first network device that needs to measure the frequency deviation and / or the phase deviation, and / or in a case where the at least one network device comprises a second network device that only needs to measure the frequency deviation and / or the phase deviation, the reference network device further comprises a second reference network device; the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation.

[0056] The UCI further comprises third indication information; the third indication information is used to indicate the second reference network device; and the third indication information is arranged in priority to the deviation information of the at least one network device relative to the reference network device.

[0057] In a possible implementation, in a case where the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the reference network device comprises a second reference network device; the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation.

[0058] The UCI further comprises third indication information; the third indication information is used to indicate the second reference network device; and the third indication information is arranged in priority to the frequency deviation and / or the phase deviation of the at least one network device relative to the second reference network device.

[0059] In a possible implementation, in a case where the reference signal resource corresponding to each network device is one, the identifier corresponding to each network device is an identifier of the reference signal resource; and in a case where the reference signal resource corresponding to each network device is multiple, the identifier corresponding to each network device is an identifier of a same reference signal resource set to which the multiple reference signal resources belong.

[0060] It should be understood that, since the method embodiment and the device embodiment are different presentation forms of the same technical concept, the content of the first aspect of the embodiment of the present application should be synchronously adapted to the third aspect of the embodiment of the present application, and the same or similar beneficial effects can be achieved, which will not be repeated here.

[0061] In a fourth aspect, the embodiment of the present application provides a communication device, which comprises a second transceiver unit; the second transceiver unit is used to:

[0062] transmit, to a terminal device, a reference signal resource; the reference signal resource is used for the terminal device to measure deviation information of the network device relative to a reference network device in a plurality of network devices; the deviation information comprises at least one of a time delay deviation, a frequency deviation, and a phase deviation; the plurality of network devices comprises the network device;

[0063] receive, from the terminal device, uplink control information (UCI); the UCI comprises the deviation information of at least one network device relative to the reference network device; the at least one network device is a network device other than the reference network device in the plurality of network devices;

[0064] The deviation information of the at least one network device relative to the reference network device is arranged based on an identifier corresponding to the at least one network device.

[0065] In a possible implementation, for at least one first network device in the at least one network device that needs to measure the time delay deviation, the UCI further comprises first indication information of the at least one first network device; the reference network device comprises a first reference network device; the first reference network device is a reference network device used for measuring the time delay deviation; the first indication information of any first network device B in the at least one first network device is used to indicate whether the time delay deviation of the first network device B relative to the first reference network device plus a time delay spread is greater than or equal to a length of a cyclic prefix;

[0066] The first indication information of each first network device is arranged adjacent to the time delay deviation of each first network device relative to the first reference network device; or,

[0067] The first indication information of the at least one first network device is arranged based on an identifier corresponding to the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the deviation information in the UCI.

[0068] In a possible implementation, the UCI further comprises second indication information; the second indication information is used to indicate the first reference network device; and the second indication information is arranged in priority to the first indication information of the at least one first network device and the deviation information of the at least one network device relative to the reference network device.

[0069] In a possible implementation, in a case where the at least one first network device comprises a target first network device that needs to measure the frequency deviation and / or the phase deviation, and / or in a case where the at least one network device comprises a second network device that only needs to measure the frequency deviation and / or the phase deviation, the reference network device further comprises a second reference network device; the second reference network device is a reference network device used for measuring the frequency deviation and / or the phase deviation.

[0070] The UCI further comprises third indication information, the third indication information being used for indicating the second reference network device; and the third indication information is arranged in priority to the deviation information of the at least one network device relative to the reference network device.

[0071] In a possible implementation, when the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the reference network device comprises a second reference network device; and the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation.

[0072] The UCI further comprises third indication information; the third indication information is used for indicating the second reference network device; and the third indication information is arranged in priority to the frequency deviation and / or the phase deviation of the at least one network device relative to the second reference network device.

[0073] In a possible implementation, when the reference signal resource corresponding to each network device is one, the identification corresponding to each network device is an identification of the reference signal resource; and when the reference signal resource corresponding to each network device is multiple, the identification corresponding to each network device is an identification of a same reference signal resource set to which the multiple reference signal resources belong.

[0074] In a possible implementation, when the network device is the first network device B, the first indication information of the at least one first network device is arranged based on the identification corresponding to the at least one first network device, and the first indication information of the at least one first network device is arranged in priority to the deviation information of the at least one network device relative to the reference network device, the apparatus further comprises a fourth processing unit; the fourth processing unit is configured to:

[0075] decode a sequence segment in which the first indication information of the first network device B in the UCI is located, to obtain the first indication information of the first network device B;

[0076] determine, based on the first indication information of the first network device B, a decoding priority of a time delay deviation of the first network device B relative to the first reference network device.

[0077] It should be understood that, since the method embodiment and the apparatus embodiment are different presentation forms of the same technical concept, the content of the second aspect of the embodiments of the present application should be synchronously adapted to the fourth aspect of the embodiments of the present application, and the same or similar beneficial effects can be achieved, which will not be repeated here.

[0078] In a fifth aspect, an embodiment of the present application provides a communication method applied to a first communication device, for example, the first communication device can be a terminal device, or can be a module (for example, a processor, a chip, a chip system, a circuit, etc.) in the terminal device. The module can be a communication module in the terminal device, or a circuit or chip responsible for a communication function in the terminal device, such as a modem chip, also known as a baseband chip, or a SOC chip or SIP chip containing a modem core. The method includes the following steps.

[0079] determining a first precoding matrix, the first precoding matrix being obtained by performing time delay and / or frequency compensation on a channel between the first communication device and a target network device according to a first time delay deviation and / or a first frequency deviation, the first time delay deviation being used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device, and the first frequency deviation being used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device;

[0080] sending, to the target network device, indication information of the first precoding matrix and information of the first time delay deviation and / or the first frequency deviation;

[0081] receiving fourth indication information from the target network device, the fourth indication information being used to indicate whether the target network device receives the information of the first time delay deviation and / or the first frequency deviation.

[0082] The implementation manner and beneficial effects of the first frequency deviation can be referred to the first time delay deviation.

[0083] It can be seen that, in the embodiment of the present application, the first communication device can perform time delay compensation on the channel between the first communication device and the target network device by using the measured first time delay deviation, and calculate the compensated first precoding matrix based on the time delay compensated channel, and then send the indication information of the first precoding matrix and the information of the first time delay deviation to the target network device, so that the target network device can perform time delay compensation on the downlink channel by using the first time delay deviation, and perform precoding on the downlink data by using the first precoding matrix, thereby realizing ideal CJT. The second communication device can send the fourth indication information to the first communication device to inform the first communication device whether the target network device receives the first time delay deviation, if the first time delay deviation is received, the first precoding matrix is used to perform precoding on the downlink data, if the first time delay deviation is not received, the first communication device and the target network device need to further align which precoding matrix is used for precoding, thereby facilitating the first communication device and the target network device to align the specific precoding matrix used.

[0084] In a possible implementation, the fourth indication information is sent through a physical downlink shared channel (PDSCH), downlink control information (DCI), medium access control-control element (MAC-CE) signaling, or radio resource control (RRC) signaling.

[0085] In this implementation, the first communication device can receive the fourth indication information sent by the second communication device, thereby determining whether the target network device receives the first time delay offset, and further aligning with the target network device in the case where the target network device does not receive the first time delay offset, to determine a precoding matrix used for precoding of downlink data, thereby facilitating the first communication device to use the precoding matrix to decode when receiving the downlink data.

[0086] In a possible implementation, the first precoding matrix is obtained by the first communication device measuring a reference signal resource sent by the target network device.

[0087] In this implementation, the first communication device can measure a non-ideal precoding matrix based on the reference signal resource sent by the target network device, and compensate the precoding matrix using the time delay compensated channel, thereby obtaining an ideal first precoding matrix, thereby facilitating the target network device to use the first precoding matrix to perform precoding of downlink data.

[0088] In a possible implementation, the method further includes:

[0089] sending, to the target network device, capability information; the capability information is used to indicate a capability of the first communication device to support measurement of at least one of the following to obtain the first precoding matrix and report the first precoding matrix: a periodic reference signal resource, a semi-persistent reference signal resource, and an aperiodic reference signal resource.

[0090] In this implementation, the first communication device can send, to the target network device, a capability of supporting reporting of the time delay compensated precoding matrix in the case where the target network device sends a periodic reference signal resource, a semi-persistent reference signal resource, or an aperiodic reference signal resource, so as to facilitate the target network device to trigger the first communication device to report the time delay compensated precoding matrix through the corresponding reference signal resource.

[0091] In a possible implementation, the method further includes:

[0092] sending fifth indication information to the target network device; the fifth indication information is used to indicate a starting subcarrier of the first communication device for performing time delay compensation on a channel between the first communication device and the target network device according to the first time delay bias; or a starting frequency domain position of protocol predefined time delay compensation. One possible way in the protocol predefinition is that the starting point of time delay compensation is the frequency domain starting point of the channel state information reference resource.

[0093] In this implementation, after reporting the first time delay bias and the first precoding matrix, the first communication device can further report a starting subcarrier of time delay compensation on a channel between the first communication device and the target network device by using the first time delay bias, so that the target network device can compensate the PDSCH based on the starting subcarrier or the starting frequency domain position of protocol predefined time delay compensation after receiving the first time delay bias, and then use the first precoding for downlink transmission on the compensated PDSCH.

[0094] In one possible implementation, in a case where the fourth indication information indicates that the target network device does not receive the information of the first time delay bias and / or the first frequency bias, the method further includes:

[0095] resending the information of the first time delay bias and / or the first frequency bias to the target network device; or

[0096] sending indication information of a second precoding matrix to the target network device, the second precoding matrix being a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on a channel between the first communication device and the target network device.

[0097] In this implementation, in a case where the fourth indication information indicates that the target network device does not receive the information of the first time delay bias, the first communication device can further resend the first time delay bias, so that the target network device can use the first precoding matrix on the compensated PDSCH by using the first time delay bias; or the first communication device can send the second precoding matrix without time delay compensation to the target network device, so that the target network device can use the second precoding matrix on the PDSCH, thereby aligning the precoding matrix.

[0098] In a sixth aspect, an embodiment of the present application provides a communication method applied to a second communication device, for example, the second communication device can be a network device, or can be a module (for example, a processor, a chip, a chip system, a circuit, etc.) in the network device. The module can be a communication module in the network device, or a circuit or chip responsible for communication function in the network device, such as a modem chip, also known as a baseband chip, or a SOC chip or SIP chip containing a modem core. Wherein, the method includes:

[0099] receive indication information of a first precoding matrix from the first communication device; the first precoding matrix is obtained by the first communication device according to a first time delay deviation and / or a first frequency deviation to compensate a time delay and / or a frequency of a channel between the first communication device and the target network device; the first time delay deviation is used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and the reference network device; the first frequency deviation is used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device;

[0100] send fourth indication information to the first communication device; the fourth indication information is used to indicate whether the target network device receives the information of the first time delay deviation and / or the first frequency deviation.

[0101] In the implementation manner of the first frequency deviation, the beneficial effects can be referred to the first time delay deviation.

[0102] It can be seen that, in the embodiments of the present application, the first communication device can compensate the time delay of the channel between the first communication device and the target network device by using the measured first time delay deviation, and calculate the compensated first precoding matrix based on the time delay compensated channel, and then send the indication information of the first precoding matrix and the information of the first time delay deviation to the target network device, so that the target network device can compensate the time delay of the downlink channel by using the first time delay deviation, and precode the downlink data by using the first precoding matrix, thereby realizing ideal CJT. The second communication device can at least receive the first precoding matrix, and send the fourth indication information to the first communication device to inform the first communication device whether the target network device receives the first time delay deviation, if the first time delay deviation is received, the first precoding matrix is used to precode the downlink data, if the first time delay deviation is not received, the first communication device and the target network device need to further align which precoding matrix is used for precoding, thereby facilitating the first communication device and the target network device to align the specific precoding matrix used.

[0103] In a possible implementation manner, the fourth indication information is sent through a physical downlink shared channel (PDSCH), a downlink control information (DCI), a medium access control-control element (MAC-CE) signaling or a radio resource control (RRC) signaling.

[0104] In this implementation manner, the second communication device can send the fourth indication information to the first communication device to inform the first communication device whether the target network device receives the first time delay deviation, and can further align with the first communication device in the case that the target network device does not receive the first time delay deviation, to determine the precoding matrix used for precoding the downlink data, and then facilitate the first communication device to use the precoding matrix for decoding when receiving the downlink data.

[0105] In a possible implementation, the first precoding matrix is measured by the first communication device based on a reference signal resource transmitted by the target network device.

[0106] In this implementation, the first precoding matrix received by the second communication device can be a non-ideal precoding matrix measured by the first communication device based on the reference signal resource transmitted by the target network device, which is compensated by the first communication device using the channel with the time delay compensation, so as to facilitate precoding of the downlink data using the first precoding matrix.

[0107] In a possible implementation, the method further includes:

[0108] receiving capability information from the first communication device; the capability information is used to indicate that the first communication device supports measuring at least one of the following to obtain the first precoding matrix and reporting the first precoding matrix: periodic reference signal resource, semi-persistent reference signal resource, and aperiodic reference signal resource.

[0109] In this implementation, the second communication device can receive the capability of the first communication device to report the precoding matrix after time delay compensation in the case that the target network device transmits periodic reference signal resource, semi-persistent reference signal resource, or aperiodic reference signal resource, so as to trigger the first communication device to report the precoding matrix after time delay compensation through the corresponding reference signal resource.

[0110] In a possible implementation, the method further includes:

[0111] receiving fifth indication information from the first communication device; the fifth indication information is used to indicate a starting subcarrier of the first communication device for time delay compensation of the channel between the first communication device and the target network device according to the first time delay offset; or a starting frequency domain position of protocol predefined time delay compensation, and one possible way of the protocol predefinition is that the starting point of the time delay compensation is the frequency domain starting point of the channel state information reference resource.

[0112] In the case that the fourth indication information indicates that the target network device has received the information of the first time delay offset, the PDSCH is a PDSCH for the second communication device based on the starting subcarrier and using the first time delay offset for time delay compensation; the method further includes:

[0113] sending, to the first communication device, downlink data precoded by the first precoding matrix through the PDSCH.

[0114] In the implementation, the second communication device can further receive information of a starting subcarrier of the first communication device performing channel time delay compensation by using the first time delay offset, so that the PDSCH can be compensated based on the starting subcarrier or a starting frequency domain position of protocol predefined time delay compensation after receiving the first time delay offset, and then the first precoding is used for precoding the compensated PDSCH for downlink transmission.

[0115] In a possible implementation, when the fourth indication information indicates that the target network device has not received information of the first time delay offset and / or the first frequency offset, the method further includes:

[0116] performing time delay and / or frequency compensation on the PDSCH by using the second time delay offset and / or the second frequency offset, determining the third precoding matrix as a precoding matrix of downlink data transmitted by the PDSCH after the time delay and / or frequency compensation; the second time delay offset and / or the second frequency offset are time delay and / or frequency offsets of the first communication device received by the target network device before the information of the first time delay offset and / or the first frequency offset; the third precoding matrix is obtained by the first communication device after performing time delay and / or frequency compensation on a channel between the first communication device and the target network device according to the second time delay offset and / or the second frequency offset; or,

[0117] receiving the information of the first time delay offset and / or the first frequency offset retransmitted by the first communication device; or,

[0118] receiving a second precoding matrix from the first communication device; the second precoding matrix is a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on the channel between the first communication device and the target network device.

[0119] In the implementation, when the fourth indication information indicates that the target network device has not received information of the first time delay offset, the first communication device can further retransmit the first time delay offset, and the target network device can use the first precoding matrix on the PDSCH compensated by using the first time delay offset; or the first communication device can send a second precoding matrix without time delay compensation to the target network device, and the target network device can use the second precoding matrix on the PDSCH, so as to align the precoding matrix. Further, the second communication device can directly perform time delay compensation on the PDSCH by using the second time delay offset previously reported by the first communication device, and use a third precoding matrix obtained by performing time delay compensation on the channel between the first communication device and the target network device according to the second time delay offset as a precoding matrix of downlink data.

[0120] In a seventh aspect, an embodiment of the present application provides a communication method applied to a first communication device, for example, the first communication device can be a terminal device, or can be a module (for example, a processor, a chip, a chip system, a circuit, etc.) in the terminal device. The module can be a communication module in the terminal device, or a circuit or chip responsible for the communication function in the terminal device, such as a modem chip, also known as a baseband chip, or a SOC chip or SIP chip containing a modem core. The method includes the following steps:

[0121] determining a first precoding matrix, the first precoding matrix being obtained by the first communication device performing time delay and / or frequency compensation on a channel between the first communication device and a target network device according to a first time delay deviation and / or a first frequency deviation; the first time delay deviation is used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; the first frequency deviation is used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; the first time delay deviation is determined based on a type of a reference signal resource for measuring the precoding matrix or is predefined according to a protocol; and the first frequency deviation is determined based on the type of the reference signal resource for measuring the precoding matrix or is predefined according to the protocol;

[0122] sending indication information of the first precoding matrix to the target network device.

[0123] The implementation manner and beneficial effects of the first frequency deviation can be referred to the first time delay deviation.

[0124] It can be seen that in the embodiment of the present application, the first communication device (or the terminal device) and the target network device (or the second communication device) can be indicated by a preconfigured manner to use which time delay deviation (here, the first time delay deviation) reported by the first communication device to perform channel time delay compensation, for example, the specific time delay deviation used can be determined based on the type of the reference signal resource for measuring the precoding matrix, or predefined by the protocol, so that the target network device applies the precoding matrix (here, the first precoding matrix) calculated after compensation to PDSCH for downlink transmission, thereby making the first communication device and the target network device not need to perform additional signaling interaction to align which time delay compensation is used to compensate the channel and the precoding matrix, and further facilitating to ensure the timeliness of the downlink transmission of the target network device and save signaling overhead.

[0125] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first delay deviation is the delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0126] The first frequency deviation is determined based on the type of reference signal resource in the measurement precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0127] In this implementation, for the aperiodic reference signal resources used to measure the precoding matrix, the first communication device and the target network device can predefine the delay deviation measured and reported by the first communication device (and received by the target network device) at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger the reporting of reference signal resources or before the target network device sends reference signal resources to the first communication device. This allows the delay deviation for both parties to perform delay compensation on the channel to be determined without further interaction.

[0128] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first delay deviation is the delay deviation of the most recent report no later than the latest measurement resource time for measuring the channel state information reference resource.

[0129] The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the frequency deviation reported no later than the latest measurement resource time used to measure the channel state information reference resource.

[0130] In this implementation, for periodic or semi-persistent reference signal resources used to measure the precoding matrix, the delay deviation reported most recently before the measurement resource time for measuring channel state information (CSI reference resource) no later than the latest time of the CSI reference resource can be predefined as the first delay deviation. Thus, the first communication device and the target network device can determine the delay deviation for both parties to perform delay compensation on the channel without further interaction. This ensures both the timeliness of the first delay deviation and that the first communication device has enough time to compensate the precoding matrix to obtain the first precoding matrix.

[0131] Eighthly, embodiments of this application provide a communication method applied to a second communication device. For example, the second communication device may be a network device, or a module (e.g., processor, chip, chip system, circuit, etc.) within the network device. This module may be a communication module within the network device, or a circuit or chip within the network device responsible for communication functions, such as a modem chip (also known as a baseband chip), or a SOC chip or SIP chip containing a modem core. The method includes:

[0132] Delay compensation is performed on the Physical Downlink Shared Channel (PDSCH) using a first delay deviation and / or a first frequency deviation; the first delay deviation and / or the first frequency deviation are measured by the first communication device and transmitted to the target network device; the first delay deviation is used to indicate the deviation of the delay and / or frequency between the first communication device and the target network device relative to the delay and / or frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol.

[0133] Receive indication information from the first communication device for the first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device based on the first time delay deviation and / or the first frequency deviation;

[0134] Downlink data precoded by the first precoding matrix is ​​transmitted to the first communication device via a PDSCH after time delay and / or frequency compensation.

[0135] As can be seen, in this embodiment of the application, the first communication device (or terminal device) and the target network device (or the second communication device) can be instructed in a pre-configured manner to use which delay deviation (here, the first delay deviation) reported by the first communication device for channel delay compensation. For example, the specific delay deviation used can be determined based on the type of reference signal resource for measuring the precoding matrix, or it can be predefined by the protocol, so that the target network device can apply the precoding matrix (here, the first precoding matrix) calculated after compensation to the PDSCH for downlink transmission. This eliminates the need for additional signaling interaction between the first communication device and the target network device to align which delay compensation to use to compensate the channel and the precoding matrix, thereby helping to ensure the timeliness of downlink transmission of the target network device and saving signaling overhead.

[0136] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first delay deviation is the delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0137] The first frequency deviation is determined based on the type of reference signal resource in the measurement precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0138] In this implementation, for the aperiodic reference signal resources used to measure the precoding matrix, the delay deviation measured and reported by the first communication device (and received by the target network device) at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger the reporting of reference signal resources or before the target network device sends reference signal resources to the first communication device can be predefined as the first delay deviation. Thus, the first communication device and the target network device can determine the delay deviation for both parties to perform delay compensation on the channel without further interaction.

[0139] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first delay deviation is the delay deviation of the most recent report no later than the latest measurement resource time for measuring the channel state information reference resource.

[0140] The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the frequency deviation reported no later than the latest measurement resource time used to measure the channel state information reference resource.

[0141] In this implementation, for periodic or semi-persistent reference signal resources used to measure the precoding matrix, the delay deviation reported most recently before the measurement resource time for measuring channel state information (CSI reference resource) no later than the latest time of the CSI reference resource can be predefined as the first delay deviation. Thus, the first communication device and the target network device can determine the delay deviation for both parties to perform delay compensation on the channel without further interaction. This ensures both the timeliness of the first delay deviation and that the first communication device has enough time to compensate the precoding matrix to obtain the first precoding matrix.

[0142] Ninthly, embodiments of this application provide a first communication device, which includes a third transceiver unit and a first processing unit;

[0143] A first processing unit is configured to determine a first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device;

[0144] The third transceiver unit is used to send indication information of the first precoding matrix, as well as information on the first delay deviation and / or the first frequency deviation, to the target network device; and to receive fourth indication information from the target network device; the fourth indication information is used to indicate whether the target network device has received the information on the first delay deviation and / or the first frequency deviation.

[0145] In one possible implementation, the fourth indication information is transmitted via the Physical Downlink Shared Channel (PDSCH), Downlink Control Information (DCI), Media Access Control-Control Element (MAC-CE) signaling, or Radio Resource Control (RRC) signaling.

[0146] In one possible implementation, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device.

[0147] In one possible implementation, the third transceiver unit is further configured to: send capability information to the target network device; the capability information is used to indicate that the first communication device supports the capability to measure at least one of the following to obtain the first precoding matrix and report the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources.

[0148] In one possible implementation, the third transceiver unit is further configured to: send fifth indication information to the target network device; the fifth indication information is used to indicate the starting subcarrier for the first communication device to perform delay compensation on the channel between the first communication device and the target network device based on the first delay deviation, or the protocol-predefined starting frequency domain position for delay compensation.

[0149] In one possible implementation, if the fourth indication information indicates that the target network device has not received information about the first delay deviation and / or the first frequency deviation, the third transceiver unit is further configured to:

[0150] Retransmit the information about the first delay deviation and / or the first frequency deviation to the target network device; or...

[0151] Send indication information of a second precoding matrix to the target network device. The second precoding matrix is ​​a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on the channel between the first communication device and the target network device.

[0152] It should be understood that since the method embodiments and the device embodiments are different presentations of the same technical concept, the content of the fifth aspect of the embodiments of this application should be adapted to the ninth aspect of the embodiments of this application simultaneously, and can achieve the same or similar beneficial effects, which will not be repeated here.

[0153] In a tenth aspect, embodiments of this application provide a second communication device, the device including a fourth transceiver unit; wherein the fourth transceiver unit is used for:

[0154] The system receives indication information from a first precoding matrix from a first communication device. The first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation. The first delay deviation indicates the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and a reference network device. The first frequency deviation indicates the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device.

[0155] Send a fourth indication message to the first communication device; the fourth indication message is used to indicate whether the target network device has received information on the first delay deviation and / or the first frequency deviation.

[0156] In one possible implementation, the fourth indication information is transmitted via the Physical Downlink Shared Channel (PDSCH), Downlink Control Information (DCI), Media Access Control-Control Element (MAC-CE) signaling, or Radio Resource Control (RRC) signaling.

[0157] In one possible implementation, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device.

[0158] In one possible implementation, the fourth transceiver unit is also used for:

[0159] Receive capability information from a first communication device; the capability information is used to indicate that the first communication device supports the ability to measure at least one of the following to obtain a first precoding matrix and report the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources.

[0160] In one possible implementation, the fourth transceiver unit is further configured to: receive fifth indication information from the first communication device; the fifth indication information is used to indicate the starting subcarrier for the first communication device to perform time delay compensation on the channel between the first communication device and the target network device according to the first time delay deviation; or the starting frequency domain position of the time delay compensation predefined by the protocol.

[0161] When the fourth indication information indicates that the target network device has received the information of the first delay deviation, the PDSCH is the PDSCH after delay compensation by the second communication device based on the starting subcarrier and utilizing the first delay deviation; the fourth transceiver unit is also used for:

[0162] Downlink data precoded by the first precoding matrix is ​​sent to the first communication device via PDSCH.

[0163] In one possible implementation, if the fourth indication information indicates that the target network device has not received information about the first delay deviation and / or the first frequency deviation, the fourth transceiver unit is further configured to:

[0164] The PDSCH is time-delayed and / or frequency-compensated using a second time delay offset and / or a second frequency offset, and the third precoding matrix is ​​determined as the precoding matrix of the downlink data transmitted via the time-delayed and / or frequency-compensated PDSCH; the second time delay offset and / or the second frequency offset are the time delay and / or frequency offsets received by the target network device from the first communication device before the information of the first time delay offset and / or the first frequency offset; the third precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device based on the second time delay offset and / or the second frequency offset; or...

[0165] Receive information about the first time delay deviation and / or the first frequency deviation retransmitted by the first communication device; or...

[0166] Receive a second precoding matrix from the first communication device; the second precoding matrix is ​​a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on the channel between the first communication device and the target network device.

[0167] It should be understood that since the method embodiments and the device embodiments are different presentations of the same technical concept, the content of the sixth aspect of the embodiments of this application should be adapted to the tenth aspect of the embodiments of this application simultaneously, and can achieve the same or similar beneficial effects, which will not be repeated here.

[0168] Eleventhly, embodiments of this application provide a first communication device, which includes a fifth transceiver unit and a second processing unit;

[0169] The second processing unit is configured to determine a first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to a protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to a protocol.

[0170] The fifth transceiver unit is used to send indication information of the first precoding matrix to the target network device.

[0171] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first delay deviation is the delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0172] The first frequency deviation is determined based on the type of reference signal resource in the measurement precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0173] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first delay deviation is the delay deviation of the most recent report no later than the latest measurement resource time for measuring the channel state information reference resource.

[0174] The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the frequency deviation reported no later than the latest measurement resource time used to measure the channel state information reference resource.

[0175] It should be understood that since the method embodiments and the device embodiments are different presentations of the same technical concept, the content of the seventh aspect of the embodiments of this application should be adapted to the eleventh aspect of the embodiments of this application simultaneously, and can achieve the same or similar beneficial effects, which will not be repeated here.

[0176] In a twelfth aspect, embodiments of this application provide a second communication device, which includes a sixth transceiver unit and a third processing unit;

[0177] The third processing unit is configured to perform delay compensation on the Physical Downlink Shared Channel (PDSCH) using a first delay deviation and / or a first frequency deviation; the first delay deviation and / or the first frequency deviation are measured by the first communication device and transmitted to the target network device; the first delay deviation is used to indicate the deviation of the delay and / or frequency between the first communication device and the target network device relative to the delay and / or frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to the protocol.

[0178] The sixth transceiver unit is used to receive indication information from the first precoding matrix of the first communication device; the first precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device according to the first time delay deviation and / or the first frequency deviation; and sends downlink data precoded by the first precoding matrix to the first communication device through the time delay and / or frequency compensated PDSCH.

[0179] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first delay deviation is the delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0180] The first frequency deviation is determined based on the type of reference signal resource in the measurement precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0181] In one possible implementation, the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first delay deviation is the delay deviation of the most recent report no later than the latest measurement resource time for measuring the channel state information reference resource.

[0182] The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the frequency deviation reported no later than the latest measurement resource time used to measure the channel state information reference resource.

[0183] It should be understood that since the method embodiments and the device embodiments are different presentations of the same technical concept, the content of the eighth aspect of the embodiments of this application should be adapted to the twelfth aspect of the embodiments of this application simultaneously, and can achieve the same or similar beneficial effects, which will not be repeated here.

[0184] In a thirteenth aspect, embodiments of this application provide a communication device for implementing any one of the first, second, and fifth to eighth aspects, or any one of the communication methods implemented in any one of the first, second, and fifth to eighth aspects. This device may be a terminal device / network device, a module (e.g., a processor, chip, or chip system) applied to a terminal device / network device, or a logical node, logical module, or software capable of implementing all or part of the functions of the terminal / network device.

[0185] In one possible implementation, the communication device in the fifth aspect includes units, modules, or means for respectively executing the methods in any one of the first, second, fifth to eighth aspects or any implementation thereof. The units, modules, or means may be implemented in software, hardware, or a combination of software and hardware.

[0186] In another possible implementation, the communication device in the thirteenth aspect above includes at least one processor; the at least one processor is configured to perform the corresponding functions in the communication method described above.

[0187] Optionally, the at least one processor may be coupled to at least one memory for storing necessary programs (instructions) and / or data (such as one or more computer programs) of the device. Optionally, the communication device may further include a communication interface for enabling communication between the device and other network elements. Optionally, the at least one memory may be located internally or externally to the communication device.

[0188] Optionally, the communication device may further include a transceiver unit, with the processor coupled to the transceiver unit. The processor executes computer programs or instructions to control the transceiver unit to receive and send information. When the processor executes the computer programs or instructions, it is also used to implement the above method through logic circuits or executed code instructions. The transceiver unit may be a transceiver, transceiver circuit, or input / output interface, used to receive signals from other communication devices outside the communication device and transmit them to the processor, or to send signals from the processor to other communication devices outside the communication device. When the communication device is a chip, the transceiver unit is a transceiver circuit or an input / output interface.

[0189] When the communication device in aspect thirteen above is a chip, the transmitting unit can be an output unit, such as an output circuit or a communication interface; the receiving unit can be an input unit, such as an input circuit or a communication interface. When the communication device is a terminal device, the transmitting unit can be a transmitter or a receiver; the receiving unit can be a receiver or a receiver.

[0190] In a fourteenth aspect, embodiments of this application provide a chip, including: a processor for calling and running a computer program from a memory, causing a device on which the chip is installed to perform the method as described in any one of the first, second, fifth, sixth, seventh, or eighth aspects above.

[0191] In a fifteenth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program for execution by a device, wherein the computer program, when executed, implements the method as described in any of the embodiments of the first, second, fifth, sixth, seventh, or eighth aspects above.

[0192] In a sixteenth aspect, embodiments of this application provide a computer program product that, when run by a device, causes the device to perform the method as described in any of the embodiments of the first, second, fifth, sixth, seventh, or eighth aspects above. Attached Figure Description

[0193] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0194] Figure 1 is a schematic diagram of the deviation parameters reported by the UE in a related technology;

[0195] Figure 2 is a schematic diagram of a system architecture provided in an embodiment of this application;

[0196] Figure 3 is a schematic diagram of a network element module provided in an embodiment of this application;

[0197] Figure 4 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0198] Figure 5 is a schematic diagram of a UCI format provided in an embodiment of this application;

[0199] Figure 6 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0200] Figure 7A is a schematic diagram of another UCI format provided in an embodiment of this application;

[0201] Figure 7B is a schematic diagram of another UCI format provided in an embodiment of this application;

[0202] Figure 8 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0203] Figure 9A is a schematic diagram of another UCI format provided in an embodiment of this application;

[0204] Figure 9B is a schematic diagram of another UCI format provided in an embodiment of this application;

[0205] Figure 10 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0206] Figure 11 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0207] Figure 12 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0208] Figure 13 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0209] Figure 14 is a schematic diagram of another UCI format provided in an embodiment of this application;

[0210] Figure 15 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0211] Figure 16 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0212] Figure 17 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0213] Figure 18 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0214] Figure 19 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0215] Figure 20 is a schematic diagram of selecting a first time delay deviation provided in an embodiment of this application;

[0216] Figure 21 is a schematic diagram of another option for selecting the first time delay deviation provided in an embodiment of this application;

[0217] Figure 22 is a schematic diagram of a communication device provided in an embodiment of this application;

[0218] Figure 23 is a schematic diagram of another communication device provided in an embodiment of this application;

[0219] Figure 24 is a schematic diagram of another communication device provided in an embodiment of this application;

[0220] Figure 25 is a schematic diagram of the structure of a first communication device provided in an embodiment of this application;

[0221] Figure 26 is a schematic diagram of the structure of a second communication device provided in an embodiment of this application;

[0222] Figure 27 is a schematic diagram of another first communication device provided in an embodiment of this application;

[0223] Figure 28 is a schematic diagram of another second communication device provided in an embodiment of this application;

[0224] Figure 29 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0225] Figure 30 is a schematic diagram of a baseband hardware provided in an embodiment of this application. Detailed Implementation

[0226] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0227] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0228] The terms “component,” “module,” “system,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, an application running on a terminal device and the terminal device can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0229] First, a brief introduction to the relevant terms and technical background used in this application will be provided to facilitate understanding by those skilled in the art.

[0230] (1) Orthogonal Frequency Division Multiplexing (OFDM);

[0231] (2) New Radio (NR);

[0232] (3) Multiple Antenna: Multiple Input Multiple Output, MIMO;

[0233] (4) Transmitting and Receiving Point (TRP);

[0234] (5) Channel State Information (CSI);

[0235] (6) Physical Uplink Shared Channel (PUSCH);

[0236] (7) Physical Uplink Control Channel (PUCCH);

[0237] (8) Physical Downlink Control Channel (PDCCH);

[0238] (9) Physical Downlink Shared Channel (PDSCH);

[0239] (10) Reference Signals (also known as pilot signals): RS;

[0240] (11) Downlink Control Information (DCI);

[0241] (12) Channel Rank Indicator: RI;

[0242] (13) Channel Quality Indicator (CQI);

[0243] (14) Backhaul link: BH;

[0244] (15) Unique identifier: Identity, ID;

[0245] (16) Channel sounding reference signal: SRS;

[0246] (17) Radio Access Network (RAN);

[0247] (18) Discrete Fourier Transform (DFT);

[0248] (19) Sub-carrier Spacing: SCS;

[0249] (20) Parts per million: ppm;

[0250] (21) Part per billion: ppb;

[0251] (22) Cyclic Prefix: CP;

[0252] (23) Internet Protocol (IP);

[0253] (24) RAN interface IP-based: IPRAN, the typical one-way network latency is 4 milliseconds (ms), also known as non-ideal backhaul.

[0254] (25) Centralized-RAN: CRAN; backhaul bandwidth is usually between 10 gigabytes (G) and 100G, with a typical latency of 200 microseconds (us), also known as ideal backhaul;

[0255] (26) Frequency offset, FO;

[0256] (27) Delay offset: Delayoffset, DO.

[0257] To address the frequency and phase deviation issues present in many scenarios, such as IPRAN and CRAN cross-frame networking, a relevant technology involves TRPs in the CJT network exchanging pilot signals over the air interface to estimate calibration coefficients. The impact of clock asynchrony in this technology is reflected in the calibration coefficients. By compensating for the calibration coefficients of the transmit and receive channels between TRPs, the effects of non-ideal clock synchronization are effectively compensated. A brief analysis is provided below using the exchange of pilot symbols between TRP1 and TRP2 as an example:

[0258] Let the pilot signal received by TRP1 and TRP2 be:

[0259] Let the pilot signal received by TRP2 and TRP1 be:

[0260] Where s represents the pilot symbols transmitted between TRP1 and TRP2, t represents time, and k represents the sequence number or index of the pilot symbol; Δτ syn1 With Δτ syn2 Δf1 and Δf2 represent the timing deviations of TRP1 and TRP2, respectively, which are the deviations of the timing of TRP1 and TRP2 from a certain standard time; Δf1 and Δf2 represent the frequency deviations of TRP1 and TRP2, respectively, which are the deviations of the carrier waves generated by TRP1 and TRP2 from a certain standard frequency; η 1,r With η 2,r Representing the amplitude, phase, and time delay of the receiving channels TRP1 and TRP2 respectively, and correspondingly, η 1,t With η 2,t These represent the amplitude, phase, and delay of the TRP1 and TRP2 transmission channels, respectively; h 1→2 with h 2→1 Let TRP1 and TRP2, and TRP2 to TRP1 be the air interface channels, respectively. Due to the reciprocity of the two transmission channels, the two air interface channels are equal. In this case, the calibration coefficient can be obtained by dividing the received signals from the pilot exchanges:

[0261] After applying the calibration coefficient C, the ratios of the transmit and receive channel responses from TRP1 to TRP2 are equal, thus satisfying the following characteristic:

[0262] Analysis of the above equation shows that, to ensure the characteristics given in the equation are met at every moment, the calibration coefficient C needs to change with time, mainly due to... This factor refers to the phase difference between stations that accumulates over time due to frequency deviation. However, pilot communication between TRPs only provides the calibration coefficient C for a single calibration moment. Between two calibration moments, the calibration coefficient obtained from the previous calibration moment is used for channel compensation, which cannot compensate in real time for the phase difference accumulated over time due to frequency deviation, especially when the interval between two calibrations is long and the accumulated phase difference exceeds 180°. Non-ideal clock synchronization introduces a phase difference that accumulates over time and subcarriers between TRPs with non-coordinated clocks, affecting the effectiveness of signal coherent superposition and interference coherent cancellation.

[0263] Another related technology involves the UE reporting relevant parameters to assist the base station in compensating for inter-station transmission signal deviations caused by inter-station clock asynchrony, delay, and Doppler. As shown in Figure 1, TRP1 and TRP2 transmit downlink-reference signals (DL-RS) within a specific time period to measure frequency offset Δf and delay Δτ. If UE-level frequency offset and delay compensation is performed, the frequency offset Δf reported by the UE includes the frequency offset caused by clock asynchrony between TRPs and the Doppler frequency offset caused by UE movement. The delay Δτ reported by the UE includes timing deviation, air interface transmission delay, and transmit / receive channel delay caused by clock asynchrony between TRPs. The UE can use the downlink reference signals transmitted by TRP1 and TRP2 for channel estimation. After processing such as Doppler domain transformation and Doppler domain frequency offset estimation, the UE can obtain the reported parameters and report them via UCI. After receiving and decoding the relevant parameters, TRP1 and TRP2 can perform frequency offset compensation. The related technology specifies the relevant information in the UCI reported by the UE:

[0264] (1) When the reported quantity only includes the time delay deviation information between each TRP, the specified reported quantity includes:

[0265] The log2N bit indication information indicates the reference TRP;

[0266] (N-1) bits of indication information dn (used to indicate whether the delay deviation + delay spread between each TRP measured by the UE and the reference TRP exceeds one CP length);

[0267] (N-1)*X bits per TRP corresponds to the time delay deviation DO of the reference TRP.

[0268] Where N is the number of TRPs that make up a CJT network, and X is the quantization bits of each DO.

[0269] (2) When the reported quantity only includes frequency deviation information between each TRP, the specified reported quantity includes:

[0270] The log2N bit indication information indicates the reference TRP;

[0271] (N-1)*Y bits per TRP corresponds to the frequency deviation FO of the reference TRP.

[0272] Where Y is the quantization bit of each FO.

[0273] (3) When the reported quantity includes both time delay and frequency deviation information between various TRPs, the specified reported quantity includes:

[0274] log2N bits of indication information indicate the delay reference TRP;

[0275] The log2N bit indication information indicates the frequency reference TRP;

[0276] (N-1) bits of indication information dn (used to indicate whether the delay deviation + delay spread between each TRP measured by the UE and the reference TRP exceeds one CP length);

[0277] (N-1)*X bits per TRP corresponds to the time delay deviation DO of the reference TRP;

[0278] (N-1)*Y bits per TRP corresponds to the frequency deviation FO of the reference TRP.

[0279] While related technologies stipulate that UEs should report latency and frequency deviations via UCI, the specific mapping order of these reports within the UCI is not addressed in existing technologies. When multiple TRPs jointly receive the UCIs reported by the UE, each TRP still needs to interact to decode its own latency and frequency deviation information, resulting in high information acquisition complexity and inefficiency.

[0280] Furthermore, in scenarios where the UE reports latency deviations, the TRP or base station may fail to receive the latency deviation. For example, the latency deviation might be lost during transmission, or the UCI might miss or misdetect it at the TRP. In such cases, the TRP or base station may have already received the latency-compensated precoding matrix reported by the UE, but since the TRP or base station hasn't applied the corresponding latency deviation for latency compensation, it cannot use this precoding matrix for precoding. How the TRP or base station can align with the UE to inform it whether it has received the latency deviation, and which precoding matrix to use when the latency deviation is not received, is a problem that urgently needs to be solved.

[0281] To address the shortcomings of related technologies, this application provides a communication method that can be applied to various communication systems, such as fifth-generation (5G) communication systems. th This application can be applied to various scenarios, including machine-to-machine (M2M), macro-micro communication, enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (uRLLC), and massive machine-type communication (mMTC). For example, this application is primarily used in wireless communication networks where network devices do not share a common clock source, requiring joint transmission. The communication process occurs between network devices and terminals, involving multiple network devices jointly transmitting data for the terminals. For instance, the communication method provided in this application can be applied to the system architecture shown in Figure 2. The system architecture shown in Figure 2 includes network devices (such as base station 1 and base station 2) and terminals (such as terminals 1 to 5). Terminals 1 to 5 can receive downlink information from network devices (such as base station 1 and base station 2), and the downlink information sent by the base station includes user data and control information. The downlink data received by terminals 1 to 5 can be transmitted by one of the base stations (as shown in Figure 2, the downlink data received by terminals 1 and 2 comes from base station 1, and the downlink data received by terminal 5 comes from base station 2), or it can be transmitted jointly by multiple base stations (as shown in Figure 2, the downlink data received by terminals 3 and 4 can come from base station 1 and base station 2). Optionally, this application assumes that base station 1 and base station 2 do not share a common clock source. In this case, the inter-station clock asynchrony may lead to phase deviation of the inter-station transmitted signals, thereby affecting the CJT transmission effect.

[0282] For example, the terminal device or terminal in the embodiments of this application can be a device with wireless transceiver functionality. The terminal device can be a UE (User Equipment), or a handheld device, vehicle-mounted device, wearable device, or computing device with wireless communication functionality. For example, the UE can be a mobile phone, tablet computer, or computer with wireless transceiver functionality. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in autonomous driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. In the embodiments of this application, the terminal device can be a device for implementing the functions of the terminal; it can also be a device that supports the terminal in implementing these functions, such as a chip system, which can be installed in the terminal. In the embodiments of this application, the chip system can be composed of chips, or it can include chips and other discrete components.

[0283] For example, the network device in this application embodiment includes a base station (BS). A BS can be a device deployed in a wireless access network capable of wirelessly communicating with a terminal. The base station can be a macro base station, micro base station, relay station, or access point, etc. For example, the base station involved in this application embodiment can be a 5G base station or an eNB (Evolved Node B) base station in Long Term Evolution (LTE). The 5G base station can also be called a Transmission Reception Point (TRP) or a gNB (Next-Generation Node B) base station. In this application embodiment, the apparatus for implementing the functions of the network device can be the network device itself; it can also be an apparatus capable of supporting the network device in implementing the functions, such as a chip system, which can be installed in the network device. In this application embodiment, taking the network device as an example to illustrate the technical solution provided by this application embodiment, for example, the network device can be a base station. Optionally, in some deployments of the network device, the network device can be a central unit (CU) or a distributed unit (DU), etc. For example, operations or steps at the Radio Link Control (RLC), Media Access Control (MAC), and Radio Resource Control (RRC) layers can be performed by the CU; operations or steps at the Physical (PHY) layer can be performed by the DU. In other deployments of network devices, the CU can also be divided into CU-control plane (CP) and CU-user plane (UP), etc. In still other deployments of network devices, the network device can also be an antenna unit (RU). In still other deployments of network devices, the network device can also be an open radio access network (ORAN) architecture, etc. The embodiments of this application do not limit the deployment method of the network device. For example, when the network device is an ORAN architecture, the network device shown in the embodiments of this application can be an access network device in ORAN, or a module in an access network device, etc. In the ORAN architecture, CU can also be called open (O)-CU, DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU.

[0284] Specifically, in this embodiment, network devices and terminal devices can interact via signaling through the network element modules shown in Figure 3. These network element modules include, but are not limited to:

[0285] RRC signaling interaction module: A module used by network devices and terminal devices to send and receive RRC signaling;

[0286] MAC signaling interaction module: A module used by network devices and terminal devices to send and receive MAC-control element (CE) signaling;

[0287] PHY signaling and data interaction module: This module is used by network devices and terminal devices to send and receive uplink / downlink control signaling and uplink / downlink data. Network devices can send downlink control signaling or downlink data via PDCCH and PDSCH, while terminal devices can send uplink control signaling or uplink data via PUSCH and PUCCH.

[0288] Based on the aforementioned network element modules, the main signaling interaction processes between network devices and terminal devices include:

[0289] (1) The network device configures the reference signal resources for synchronization measurement, including UL-RS and DL-RS resources, to the terminal device via RRC signaling;

[0290] (2) The terminal device sends UL-RS to the network device for DL-RS pre-compensation, which facilitates the terminal device to measure synchronization-related parameters.

[0291] (3) The network device sends DL-RS to the terminal device for synchronization related parameter measurement. The terminal device receives the DL-RS sent by the network device and measures the synchronization related parameters.

[0292] (4) The terminal device reports synchronization-related parameters to the network device through PUSCH or PUCCH, which is used by the network device to compensate for the impact caused by clock asynchrony.

[0293] The technical solution provided in this application will be described in detail below with reference to specific implementation methods.

[0294] Please refer to Figure 4, which is a flowchart illustrating a communication method provided in an embodiment of this application. This method can be implemented based on the architecture shown in Figure 2. As shown in Figure 4, the method includes steps 401-402:

[0295] 401: Network device sends reference signal resources to terminal device;

[0296] Correspondingly, the terminal device receives reference signal resources from multiple network devices. These multiple network devices form a CJT network, or in other words, multiple network devices are network devices used to perform CJT for the terminal device.

[0297] In this system, the reference signal resources of any one of the network devices A are used by the terminal device to measure the deviation information of network device A relative to a reference network device among the multiple network devices. This deviation information includes at least one of time delay deviation, frequency deviation, and phase offset (PO). Specifically, taking time delay deviation as an example, the deviation information of network device A relative to the reference network device among the multiple network devices can be understood as one or more (or a sum of multiple) of timing deviation, air interface transmission delay deviation, and transmit / receive channel delay deviation caused by clock asynchrony between network device A and the reference network device; taking frequency deviation as an example, the deviation information of network device A relative to the reference network device among the multiple network devices can be understood as one or more (or a sum of multiple) of frequency deviation caused by clock asynchrony between network device A and the reference network device and Doppler frequency deviation caused by terminal device movement; taking phase offset as an example, the deviation information of network device A relative to the reference network device among the multiple network devices can be understood as the phase offset caused by clock asynchrony between network device A and the reference network device.

[0298] The reference network device can be determined by the terminal device or configured to the terminal device in advance.

[0299] For example, each network device may transmit one or more reference signal resources. When there are multiple reference signal resources, these multiple reference signal resources belong to the same set of reference signal resources, or the multiple reference signal resources constitute a single set of reference signal resources.

[0300] For example, the reference signal resource can be a CSI-RS resource. For example, the network device can be any type of base station, TRP, etc.

[0301] 402: The terminal device sends a UCI to at least one network device.

[0302] Accordingly, at least one network device receives UCI from the terminal device. In this embodiment, the terminal device can obtain at least one of the time delay deviation, frequency deviation, and phase deviation of the at least one network device relative to the reference network device by measuring the reference signal resources transmitted by each network device. The at least one network device is a network device other than the reference network device among a plurality of network devices, or for the same deviation information, the at least one network device is a network device other than the reference network device among a plurality of network devices. For example, when arranging the time delay deviation information, it is a network device other than the first reference network device; when arranging the frequency deviation and / or phase deviation, it is a network device other than the second reference network device.

[0303] The UCI includes deviation information of at least one network device relative to a reference network device among a plurality of network devices, and the deviation information of at least one network device relative to the reference network device is arranged based on the identifier corresponding to each network device.

[0304] For example, the identifier corresponding to each network device can be a pre-configured identifier in the protocol. For instance, assuming there are 4 (i.e., N=4) TRPs for multiple network devices, namely TRP0, TRP1, TRP2 and TRP3, then the identifier configured for TRP0 can be 0, the identifier configured for TRP2 can be 1, the identifier configured for TRP3 can be 2, and the identifier configured for TRP1 can be 3.

[0305] For example, when each network device corresponds to one reference signal resource, the identifier for each network device is the identifier of the reference signal resource. For instance, the identifier configured for TRP0 could be resource0, TRP1 could be resource1, TRP2 could be resource2, and TRP3 could be resource3. When each network device corresponds to multiple reference signal resources, the identifier for each network device is the identifier of the same reference signal resource set to which the multiple reference signal resources belong. For instance, the identifier configured for TRP0 could be resourceset 0, TRP1 could be resourceset 1, TRP2 could be resourceset 2, and TRP3 could be resourceset 3.

[0306] In this implementation, each network device can be pre-configured to be bound to the identifier of the reference signal resource or the identifier of the reference signal resource set transmitted by that network device. This allows the terminal device to add or arrange at least one of the time delay deviation, frequency deviation, and phase deviation of each network device relative to the reference network device in the UCI based on the identifier of the reference signal resource or the identifier of the reference signal resource set corresponding to each network device. This allows the terminal device to report relevant parameters simply and efficiently by designing the UCI format. For the network device, based on its own configured identifier of the reference signal resource or the identifier of the reference signal resource set, it can decode its own deviation information relative to the reference network device from the corresponding position in the UCI without needing to interact with other network devices to obtain this information, thus simplifying the complexity of the network device obtaining relevant parameters.

[0307] For example, taking the identifier corresponding to each network device as the identifier of the reference signal resource it transmits as an example, if all four TRPs need to measure delay deviation, frequency deviation, and phase deviation, and TRP1 is both a network device measuring delay deviation and a network device measuring frequency deviation and / or phase deviation (i.e., the first reference network device and the second reference network device are the same network device), Figure 5 shows one way to arrange the deviation information of the three TRPs relative to the reference TRP (e.g., TRP1) based on the identifier corresponding to each network device. For example, the arrangement of the deviation information of at least one network device relative to the reference network device based on the identifier corresponding to at least one network device can be based on an ascending or descending order of the identifier corresponding to at least one network device.

[0308] For example, for a network device that needs to report delay deviation (DO), the UCI includes (N-1)*X bits, where the network device corresponds to the DO of the reference network device, and X is the quantization bit of DO; for a network device that needs to report frequency deviation (FO), the UCI includes (N-1)*Y bits, where the network device corresponds to the FO of the reference network device, and Y is the quantization bit of FO; for a network device that needs to report phase deviation (PO), the UCI includes (N-1)*Z bits, where the network device corresponds to the PO of the reference network device, and Z is the quantization bit of PO.

[0309] For example, for at least one first network device in at least one network device that needs to measure delay deviation, the UCI also includes first indication information of at least one first network device; the reference network device includes a first reference network device; the first reference network device is a reference network device used to measure delay deviation; the first indication information of any one of the at least one first network devices B is used to indicate whether the delay deviation of the first network device B relative to the first reference network device plus the delay spread is greater than or equal to the length of a CP;

[0310] Wherein, the first indication information of each first network device is arranged adjacent to the delay deviation of each first network device relative to the first reference network device (or it can be understood that the first indication information of each first network device and the deviation information of each first network device relative to the reference network device are a part or a bit segment of the UCI); or, the first indication information of at least one first network device is arranged based on the identifier corresponding to at least one first network device, and all the first indication information in the UCI takes precedence over all the deviation information in the UCI.

[0311] Specifically, in scenarios where at least one network device only needs to report delay deviations, the UCI also includes first indication information for at least one network device, namely (N-1) bits of indication information dn, to indicate whether the delay deviation plus delay spread between the corresponding network device and the first reference network device exceeds a CP length. Taking the identifier corresponding to each network device as the identifier of the set of reference signal resources it transmits as an example, Figure 6 shows an example of the delay deviation information of three TRPs relative to the reference TRP (for example, it could be TRP1, where the deviation information of the reference TRP does not need to be reported) arranged adjacent to their first indication information.

[0312] Specifically, in scenarios where delay deviation information, frequency deviation information (and / or phase deviation information) are jointly reported, for the first network device that needs to measure delay deviation (assuming it is TRP0, TRP1, and TRP3, where TRP0 needs to measure both delay and frequency deviation, TRP1 needs to measure both delay, frequency, and phase deviation, and TRP3 needs to measure both delay and phase deviation), the UCI also includes a first indication information for each first network device, namely (N-1) bits of indication information dn, to indicate whether the delay deviation + delay spread between the corresponding first network device and the first reference network device exceeds a CP length. Assuming that TRP2 only needs to measure frequency deviation, and taking the identifier corresponding to each network device as the identifier of the set of reference signal resources it transmits as an example, Figure 7A shows an example where the delay deviation information of the TRP that needs to measure delay deviation relative to the reference TRP (e.g., TRP1) is arranged adjacent to its first indication information. Specifically, in this scenario, assuming that TRP0-TRP3 all need to report delay deviation information and frequency deviation information, and taking the identifier corresponding to each network device as the identifier of the reference signal resource set it sends as an example, Figure 7B shows another example in which the delay deviation information of the TRP that needs to be measured relative to the reference TRP (e.g., it could be TRP1) is arranged adjacent to its first indication information.

[0313] Specifically, in scenarios where multiple network devices only need to report latency deviations, the design in UCI can also involve first arranging the first indication information of at least one network device (i.e., (N-1) bits of indication information dn) based on the identifier corresponding to at least one network device, to indicate whether the latency deviation + latency spread between the corresponding network device and the first reference network device exceeds a CP length; then, arranging the latency deviation of at least one network device relative to the first reference network based on the identifier corresponding to at least one network device. Taking the identifier corresponding to each network device as the identifier of the reference signal resource it transmits as an example, Figure 8 shows an example of arranging the first indication information of the three TRPs before the latency deviation information of the three TRPs relative to the reference TRP (e.g., TRP1) (i.e., transmitting the first indication information first, then the latency deviation information). Here, dn_0 represents the first indication information corresponding to the network device identified as resource0 (i.e., TRP0), DO_0 represents the latency deviation corresponding to the network device identified as resource0 (i.e., TRP0), and so on.

[0314] Specifically, in scenarios where delay deviation information, frequency deviation information (and / or phase deviation information) are jointly reported, for the first network devices that need to measure delay deviation (assuming TRP0, TRP1, and TRP3, where TRP0 needs to measure both delay and frequency deviation, TRP1 needs to measure both delay, frequency, and phase deviation, and TRP3 needs to measure both delay and phase deviation), the UCI also includes first indication information for each first network device, i.e., (N-1) bits of indication information dn, to indicate whether the delay deviation + delay spread between the corresponding network device and the first reference network device exceeds one CP length. Assuming that TRP2 only needs to measure frequency deviation, and taking the identifier corresponding to each network device as the identifier of the reference signal resource it transmits as an example, Figure 9A shows an example where the first indication information of TRP0 and TRP3 is arranged according to their corresponding identifiers, and takes precedence over the deviation information of the three TRPs relative to the reference TRP (e.g., TRP1) (i.e., the first indication information is transmitted first, followed by the delay, frequency, and / or phase deviation information). After transmitting the first indication information, the order of delay deviation, frequency deviation, and / or phase deviation is not limited. For example, in Figure 9A, after the first indication information, the frequency deviation is transmitted first, then the phase deviation, and finally the delay deviation. Specifically, in this scenario, assuming that TRP0-TRP3 all need to report delay deviation information and frequency deviation information, and taking the identifier corresponding to each network device as the identifier of the reference signal resource it transmits as an example, Figure 9B shows another example of the arrangement of the first indication information of TRP0, TRP2, and TRP3 according to their corresponding identifiers, and prior to the deviation information of the three TRPs relative to the reference TRP (e.g., it could be TRP1) (i.e., transmitting the first indication information first, then the frequency deviation information and delay deviation information).

[0315] In this implementation, for the first network device that needs to report the delay deviation, the terminal device can arrange its first indication information adjacent to its delay deviation in the UCI (such as as a part of the UCI or a bit segment), or the terminal device can first arrange the first indication information of all the first network devices in the UCI, and then arrange the deviation information of at least one network device relative to the reference network device. The arrangement or reporting method is relatively flexible and has low complexity.

[0316] For example, the UCI also includes log2N bits of second indication information; the second indication information is used to indicate the first reference network device (nref1). For example, the identifier corresponding to the first reference network device can be used as the second indication information (nref1 = resource1). The second indication information takes precedence over the first indication information of at least one first network device and the deviation information of at least one network device relative to the reference network device.

[0317] Specifically, in scenarios where multiple network devices only need to report latency deviations, as shown in Figure 10, the reporting order in UCI can be: first, the second indication information (nref = resource1, i.e., TRP1 is the reference network device), then the first indication information (dn) of at least one network device + the latency deviation (DO) of at least one network device relative to the reference network device. Alternatively, as shown in Figure 11, the reporting order in UCI can be: first, the second indication information (nref = resource1), then, based on the identifier corresponding to at least one network device, the first indication information of at least one network device is arranged, and then, based on the identifier corresponding to at least one network device, the latency deviation of at least one network device relative to the first reference network is arranged.

[0318] In this implementation, the terminal device first reports the second indication information of the first reference network device for measuring the delay deviation in the UCI, so as to indicate the first reference network device to at least one network device, thereby making it easier for at least one network device to identify the reference network device for measuring the delay deviation.

[0319] For example, in cases where at least one first network device includes a target first network device for measuring frequency deviation and / or phase deviation (e.g., TRP0 and TRP3 in the example shown in FIG. 7A; TRP0, TRP2, and TRP3 in the example shown in FIG. 7B), and / or in cases where at least one network device includes a second network device for measuring only frequency deviation and / or phase deviation (e.g., TRP2 in the example shown in FIG. 7A), the reference network device further includes a second reference network device (nref2), which is a reference network device used for measuring frequency deviation and / or phase deviation. The UCI also includes log2N bits of third indication information, which is used to indicate the second reference network device. For example, the identifier corresponding to the second reference network device can be used as the third indication information (nref2 = resource2). The third indication information takes precedence over the deviation information of at least one network device relative to the reference network device.

[0320] Specifically, in scenarios where delay deviation information, frequency deviation information (and / or phase deviation information) are jointly reported, as shown in Figure 12, the reporting order in UCI can be: first, the second indication information and the third indication information (the order of the two is not limited), followed by deviation information of at least one network device relative to a reference network device (if the network device needs to measure delay deviation, the arrangement can be its first indication information (dn) + delay deviation (DO) + ​​frequency deviation (FO) (and / or phase deviation (PO)). It should be understood that since TRP1 is the first reference network device, its dn and DO do not need to be reported; and since TRP2 is the second reference network device, its FO (and / or PO) do not need to be reported). Alternatively, as shown in Figure 13, the reporting order in UCI can be: first, the second indication information and the third indication information, followed by the first indication information of at least one first network device, followed by deviation information of at least one network device relative to a reference network device.

[0321] In this implementation, for scenarios where at least one network device needs to jointly report delay deviation information, frequency deviation information (and / or phase deviation information), the terminal device prioritizes reporting in the UCI a second indication information of a first reference network device for measuring delay deviation and a third indication information of a second reference network device for measuring frequency deviation (and / or phase deviation). This indicates the first and second reference network devices to at least one network device, making it easier for the at least one network device to identify the reference network device used for measuring delay deviation and the reference network device used for measuring frequency deviation (and / or phase deviation). Furthermore, once the first and second reference network devices identify themselves as reference network devices, they do not need to perform subsequent synchronization adjustments or precoding compensation operations, which helps save power consumption and reduce overhead for both devices.

[0322] For example, in cases where multiple network devices only need to measure frequency and / or phase deviations, the reference network device includes a second reference network device. The UCI also includes log2N bits of third indication information used to indicate the second reference network device. This third indication information takes precedence over the frequency and / or phase deviations of at least one network device relative to the second reference network device.

[0323] Specifically, assuming that TRP0, TRP1, TRP2 and TRP3 only need to measure frequency deviation (FO), Figure 14 shows an example of this scenario where the third indication information (nref = resource2) is arranged first, and then the frequency deviation (FO) of at least one network device (TRP0, TRP1 and TRP3) relative to the second reference network device is arranged.

[0324] In this implementation, in a scenario where at least one network device only needs to measure frequency deviation and / or phase deviation, the terminal device may preferentially report the third indication information of the second reference network device for measuring frequency deviation (and / or phase deviation) in the UCI, so as to indicate the second reference network device to at least one network device, thereby facilitating the at least one network device to clearly identify the reference network device for measuring frequency deviation (and / or phase deviation).

[0325] As can be seen, in this embodiment of the application, the terminal device can perform measurements based on the reference signal resources of multiple network devices to obtain at least one of the time delay deviation, frequency deviation, and phase deviation of at least one network device relative to the reference network device. The terminal device then arranges the above-mentioned deviation information of at least one network device relative to the reference network device in the UCI based on the identifier corresponding to at least one network device. This achieves simple and efficient reporting of the time delay deviation, frequency deviation, and / or phase deviation of the network devices. Consequently, it is beneficial for at least one network device to decode its own time delay deviation, frequency deviation, and / or phase deviation from the UCI based on its own corresponding identifier, without having to obtain the relevant parameters through interaction between network devices, further reducing the complexity of the network devices obtaining these parameters.

[0326] Please refer to Figure 15, which is a flowchart illustrating another communication method provided in an embodiment of this application. As shown in Figure 15, taking the network device as the first network device B as an example, the method includes steps 1501-1504:

[0327] 1501: The first network device B sends reference signal resources to the terminal device;

[0328] Correspondingly, the terminal device receives reference signal resources from multiple network devices.

[0329] Among the multiple network devices, the reference signal resources of any one network device A are used by the terminal device to measure the deviation information of network device A relative to the reference network device among the multiple network devices. The deviation information includes at least one of time delay deviation, frequency deviation and phase deviation.

[0330] 1502: The terminal device sends a UCI to at least one network device.

[0331] Accordingly, the first network device B receives the UCI from the terminal device. In this embodiment, the terminal device can obtain at least one of the time delay deviation, frequency deviation, and phase deviation of each network device relative to the reference network device by measuring the reference signal resources transmitted by each network device.

[0332] The UCI includes deviation information of at least one network device relative to a reference network device among a plurality of network devices. This deviation information is based on an arrangement of identifiers corresponding to the at least one network device. The at least one network device is a network device other than the reference network device among the plurality of network devices.

[0333] The specific implementation methods of steps 1501 and 1502 can be referred to the corresponding descriptions in steps 401 and 402, and can achieve the same or similar beneficial effects.

[0334] In the case where the first indication information of at least one first network device is arranged based on the identifier corresponding to at least one first network device, and the first indication information of at least one first network device takes precedence over the deviation information of at least one network device relative to a reference network device:

[0335] 1503: The first network device B decodes the sequence segment containing the first indication information of the first network device B in the UCI to obtain the first indication information of the first network device B.

[0336] In this embodiment of the application, since all the first indication information in the UCI takes precedence over all the deviation information in the UCI, the first indication information of the first network device B will arrive at the first network device B before the time delay deviation of the first network device. In addition, the first indication information of at least one first network device is arranged based on the identifier corresponding to each first network device. Therefore, the first network device B will first decode the sequence segment (or code block) where its first indication information (dn) is located to obtain its first indication information (dn).

[0337] 1504: The first network device B determines the decoding priority of the delay deviation of the first network device B relative to the first reference network device based on its first indication information.

[0338] In this embodiment, the first network device B can determine whether its corresponding delay deviation plus delay spread is greater than or equal to the length of a CP based on the first indication information. If its corresponding delay deviation plus delay spread is less than the length of a CP, the first network device B can determine that its delay deviation relative to the first reference network device has a high decoding priority, and the first network device B needs to decode the subsequent delay deviation (DO) to use the delay deviation (DO) for delay compensation. If its corresponding delay deviation plus delay spread is greater than or equal to the length of a CP, the first network device B can determine that its delay deviation relative to the first reference network device has a low decoding priority. For network devices with low decoding priority, they can tolerate incorrect decoding of the subsequent delay deviation (DO) or not decode it at all, and instead perform delay compensation through precoding.

[0339] In this implementation, the first network device B can first decode its first indication information to determine the decoding priority of its delay deviation relative to the first reference network device. For example, if the corresponding delay deviation plus the delay spread is greater than or equal to the length of a CP (Constant Response) block, its decoding priority relative to the first reference network device can be determined to be low. When the decoding priority is determined to be low, the first network device B can tolerate decoding errors in its delay deviation relative to the first reference network device or choose to skip decoding, which helps to reduce the complexity of decoding and the complexity of synchronization compensation for the first network device B.

[0340] Please refer to Figure 16, which is a flowchart illustrating another communication method provided in an embodiment of this application. This method can be implemented based on the architecture shown in Figure 2. As shown in Figure 16, the method includes steps 1601-1603:

[0341] 1601: The first communication device determines the first precoding matrix.

[0342] The first precoding matrix is ​​obtained by the first communication device after performing delay compensation on the channel between the first communication device and the target network device based on the first delay deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device. The first communication device may be a terminal device, or it may be a module in the terminal device.

[0343] In the CJT scenario, there are multiple network devices that perform CJT on terminal devices. These multiple network devices include a target network device and a reference network device. The target network device is the network device other than the reference network device that needs to be measured for latency deviation among the multiple network devices. The reference network device (i.e., the aforementioned first reference network device) is the network device used to measure latency deviation among the multiple network devices.

[0344] Specifically, the first communication device can measure the time delay information between itself and the target network device based on the reference signal resources or set of reference signal resources transmitted by the target network device. The first communication device can also measure the time delay information between itself and the target network device based on the reference signal resources or set of reference signal resources transmitted by the reference network device. Based on the time delay information with the target network device and the time delay information with the reference network device, the first communication device can obtain the first time delay deviation. It should be noted that the reference signal resources here are those used to measure the time delay deviation; for ease of distinction, we can refer to them as the first reference signal resources.

[0345] After measuring the first time delay deviation, the first communication device can use this deviation to compensate for the time delay of the channel between itself and the target network device. For the reference signal resources sent by the target network device for measuring the precoding matrix, the first communication device can measure the corresponding precoding matrix. Using the time-delay-compensated channel, the precoding matrix can be further compensated for and optimized to obtain the ideal first precoding matrix. In other words, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device. It should be noted that the reference signal resources here refer to those used for measuring the precoding matrix; for ease of distinction, we can refer to them as the second reference signal resources.

[0346] In this implementation, the first communication device can measure a non-ideal precoding matrix based on the reference signal resources sent by the target network device, and use the delay-compensated channel to compensate for the precoding matrix, thereby obtaining an ideal first precoding matrix, which facilitates the second communication device (such as the target network device) to use the first precoding matrix for precoding downlink data.

[0347] 1602: The first communication device sends the indication information of the first precoding matrix and the information of the first delay deviation to the target network device.

[0348] Correspondingly, the second communication device receives indication information from the first precoding matrix of the first communication device. Since the first delay deviation may be lost, missed, or falsely detected, the target network device may not receive the first delay deviation. Of course, the target network device may also successfully receive the first delay deviation. The second communication device can be the target network device (e.g., TRP), or it can be a module within the target network device.

[0349] The indication information of the first precoding matrix can be the first precoding matrix itself, or it can be signaling carrying the first precoding matrix, etc. The information of the first delay deviation can be the first delay deviation, or it can be the first indication information dn of the first delay deviation (for example, in a scenario where all first indication information dn is reported before all delay deviations, if the target network device does not obtain the first indication information dn of the first delay deviation in the UCI of the terminal device, it can assume that it has not received the first delay deviation), or it can be signaling carrying the first delay deviation (such as UCI), etc.

[0350] 1603: The second communication device sends a fourth instruction message to the first communication device.

[0351] Correspondingly, the first communication device receives fourth indication information from the second communication device. The fourth indication information is used to indicate whether the target network device has received information about the first delay deviation. For example, the fourth indication information is sent via PDSCH, DCI, MAC-CE signaling, or RRC signaling. For instance, the signaling may carry a "received / not received" instruction to inform the UE whether the target network device has received the first delay deviation. Alternatively, the indication information in the signaling may indicate whether the compensated first precoding matrix is ​​available or unavailable, or it may indicate that the compensated first precoding matrix reported by the first communication device is used on the PDSCH, or that the compensated first precoding matrix cannot be used on the PDSCH. That is, the fourth indication information can directly or indirectly indicate whether the target network device has received the first delay deviation. For example, if the fourth indication information indicates that the target network device has received information about the first delay deviation, the first communication device and the target network device (or the second communication device) default to using the first precoding matrix for precoding the downlink data.

[0352] In this implementation, the first communication device can receive the fourth indication information sent by the second communication device, thereby determining whether the target network device has received the first delay deviation, and can further align with the target network device if the target network device has not received the first delay deviation, so as to determine the precoding matrix for precoding downlink data, thereby facilitating the first communication device to use the precoding matrix for decoding when receiving the downlink data.

[0353] As can be seen, in this embodiment, the first communication device can use the measured first delay deviation to perform delay compensation on the channel between itself and the target network device, and calculate the compensated first precoding matrix based on the delay-compensated channel. Then, it sends the indication information of the first precoding matrix and the information of the first delay deviation to the target network device, so that the target network device can use the first delay deviation to perform delay compensation on the downlink channel and use the first precoding matrix to precode the downlink data, thereby achieving ideal CJT. The second communication device can send a fourth indication information to the first communication device to inform it whether the target network device has received the first delay deviation. If the first delay deviation is received, the first precoding matrix is ​​used to precode the downlink data. If the first delay deviation is not received, the two need to further align on which precoding matrix to use for precoding, thus facilitating the alignment of the specific precoding matrix used by the first communication device and the target network device.

[0354] Please refer to Figure 17, which is a flowchart illustrating another communication method provided in an embodiment of this application. As shown in Figure 17, the method includes steps 1701-1706:

[0355] 1701: The first communication device determines the first precoding matrix.

[0356] 1702: The first communication device sends the indication information of the first precoding matrix and the information of the first delay deviation to the target network device.

[0357] 1703: The second communication device sends a fourth instruction message to the first communication device.

[0358] The specific implementation of steps 1701-1703 can be referred to the corresponding descriptions in steps 1601-1603, and can achieve the same or similar beneficial effects.

[0359] In the case where the fourth indication information indicates that the target network device has not received the information about the first delay deviation:

[0360] 1704: The first communication device retransmits the information of the first delay deviation to the target network device.

[0361] Correspondingly, the second communication device receives information about the first delay deviation from the first communication device. The second communication device receives the information about the first delay deviation and uses it to compensate for the PDSCH, thus enabling it to precode the downlink data using the first precoding matrix.

[0362] or,

[0363] 1705: The first communication device sends the instruction information of the second precoding matrix to the target network device.

[0364] Correspondingly, the second communication device receives indication information from the second precoded matrix of the first communication device.

[0365] or,

[0366] 1706: The second communication device uses the second delay deviation to compensate for the delay of the PDSCH and determines the third precoding matrix as the precoding matrix for the downlink data transmitted by the PDSCH after delay compensation.

[0367] The second precoding matrix is ​​a precoding matrix obtained by the first communication device without performing delay compensation on the channel between the first communication device and the target network device. For example, the second precoding matrix is ​​an uncompensated precoding matrix obtained by the first communication device measuring the reference signal resource (second reference signal resource) sent by the target network device. The indication information of the second precoding matrix can be the first precoding matrix itself, or signaling carrying the first precoding matrix, etc. The target network device can use the second precoding matrix to precode downlink data and then transmit it through the uncompensated PDSCH. Similarly, the first communication device uses the second precoding matrix to decode the downlink data.

[0368] The second delay deviation is the delay deviation received by the target network device from the first communication device before the information of the first delay deviation. The third precoding matrix is ​​obtained by the first communication device after performing delay compensation on the channel between the first communication device and the target network device based on the second delay deviation. Specifically, the second communication device uses the second delay deviation to perform delay compensation on the PDSCH, then uses the third precoding matrix to precode the downlink data, and transmits it through the delay-compensated PDSCH.

[0369] In this implementation, if the fourth indication information indicates that the target network device has not received the information of the first delay deviation, the first communication device can further retransmit the first delay deviation so that the target network device can use the first precoding matrix on the PDSCH with the first delay deviation compensation pair; or the first communication device can send the second precoding matrix without delay compensation to the target network device so that the target network device can use the second precoding matrix on the PDSCH, thereby aligning the precoding matrices. Furthermore, the second communication device can also directly use the second delay deviation previously reported by the first communication device (the specific delay deviation used can be predefined by the protocol, which can also achieve alignment between the first communication device and the target network device) to perform delay compensation on the PDSCH, and use the third precoding matrix obtained after delay compensation of the channel between the first communication device and the target network device according to the second delay deviation as the precoding matrix for downlink data.

[0370] Please refer to Figure 18, which is a flowchart illustrating another communication method provided in an embodiment of this application. As shown in Figure 18, the method includes steps 1801-1806:

[0371] 1801: The first communication device determines the first precoding matrix.

[0372] 1802: The first communication device sends the indication information of the first precoding matrix and the information of the first delay deviation to the target network device.

[0373] 1803: The second communication device sends a fourth instruction message to the first communication device.

[0374] The specific implementation of steps 1801-1803 can be referred to the corresponding descriptions in steps 1601-1603, and can achieve the same or similar beneficial effects.

[0375] 1804: The first communication device sends the fifth instruction message to the target network device.

[0376] Correspondingly, the second communication device receives a fifth indication message from the first communication device. This fifth indication message instructs the first communication device to initiate a time delay compensation process for the channel between the first communication device and the target network device based on a first time delay deviation.

[0377] In the case where the fourth indication information indicates that the target network device has received the information of the first delay deviation:

[0378] 1805: The second communication device compensates for the delay of the PDSCH based on the initial subcarrier and the first delay deviation.

[0379] In this embodiment, assuming the first communication device uses subcarrier 1 as the starting subcarrier to compensate for the channel between itself and the target network device, the second communication device (or the target network device) also starts compensating for PDSCH from subcarrier 1. This starting subcarrier can also be a protocol-predefined starting frequency domain position for delay compensation.

[0380] 1806: The second communication device sends downlink data precoded by the first precoding matrix to the first communication device via the compensated PDSCH.

[0381] In this embodiment of the application, after delay compensation of PDSCH, the first communication device uses the first precoding matrix to precode the downlink data, and then sends it to the first communication device through the compensated PDSCH.

[0382] In this implementation, after reporting the first delay deviation and the first precoding matrix, the first communication device can further report the starting subcarrier for channel delay compensation using the first delay deviation, so that the target network device can compensate the PDSCH based on the starting subcarrier after receiving the first delay deviation, and then use the first precoding in the compensated PDSCH for downlink transmission.

[0383] For example, the method further includes:

[0384] A first communication device sends capability information to a target network device. This capability information indicates that the first communication device supports the ability to measure and report at least one of the following to obtain a first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources. For example, the first communication device supports reporting a delay-compensated precoding matrix when the target network device sends periodic CSI-RS, semi-persistent CSI-RS, or aperiodic CSI-RS.

[0385] In this implementation, the first communication device (or terminal device) can send to the target network device its ability to report the precoding matrix after time delay compensation when the target network device sends periodic reference signal resources, semi-persistent reference signal resources or non-periodic reference signal resources, so that the target network device can trigger the first communication device to report the precoding matrix after time delay compensation through the corresponding reference signal resources.

[0386] It should be noted that Figures 16-19 are used as an example to illustrate the first time delay deviation in detail. The measurement, reporting and implementation of the first frequency deviation, the use of the first frequency deviation compensation precoding matrix, and whether the first communication device and the target network device receive the first frequency deviation can be referred to the specific description of the first time delay deviation. The definition of the corresponding technical features can also be defined with reference to the corresponding explanation of the first time delay deviation, and the same or similar beneficial effects can be achieved.

[0387] Please refer to Figure 19, which is a flowchart illustrating another communication method provided in an embodiment of this application. As shown in Figure 19, the method includes steps 1901-1904:

[0388] 1901: The first communication device determines the first precoding matrix.

[0389] The first precoding matrix is ​​obtained by the first communication device after performing delay compensation on the channel between the first communication device and the target network device based on a first delay deviation. The first delay deviation indicates the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device. The first delay deviation is determined based on the type of reference signal resource used to measure the precoding matrix or is predefined according to a protocol.

[0390] Specifically, in a CJT scenario, multiple network devices are involved to perform CJT on terminal devices. These multiple network devices include a target network device and a reference network device. The target network device is the network device other than the reference network device that needs to be measured for delay deviation. The reference network device (i.e., the aforementioned first reference network device) is the network device used to measure the delay deviation. The first communication device can measure the delay information between itself and the target network device based on the reference signal resources or set of reference signal resources sent by the target network device. Similarly, the first communication device can measure the delay information between itself and the target network device based on the reference signal resources or set of reference signal resources sent by the reference network device. Based on the delay information with the target network device and the reference network device, the first communication device can obtain the delay deviation information between itself and the target network device relative to the delay between itself and the reference network device, and report this information. It should be noted that the reference signal resources here are those used to measure the delay deviation; for ease of distinction, we can refer to them as the first reference signal resources.

[0391] The first communication device can measure the corresponding precoding matrix from the reference signal resources sent by the target network device for measuring the precoding matrix. Using the delay-compensated channel, the precoding matrix can be delay-compensated and optimized to obtain the ideal first precoding matrix. That is, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device. It should be noted that the reference signal resources here refer to those used for measuring the precoding matrix; for ease of distinction, we can refer to them as the second reference signal resources. Specifically, the first communication device and the target network device can align using a predefined or preconfigured method to determine which delay deviation is used for channel compensation; that is, they can align using a predefined or preconfigured method to determine which delay deviation is used to compensate for the precoding matrix reported by the first communication device.

[0392] For example, when the reference signal resource is a non-periodic reference signal resource, the first delay deviation is the delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger the reporting of the reference signal resource (second reference signal resource) or before the target network device sends the reference signal resource to the first communication device.

[0393] Specifically, as shown in Figure 20, assuming that before the target network device sends a DCI-triggered CSI-RS report to the first communication device or before the target network device sends a CSI-RS report to the first communication device, the first communication device measures and reports delay deviation 1, delay deviation 2, and delay deviation 3, then a precoding matrix can be predefined or preconfigured to compensate for delay deviation 3 (assuming the target network device can receive delay deviation 3). That is, the delay deviation compensation channel closest to the target network device sending a DCI-triggered CSI-RS report to the first communication device or before the target network device sends a CSI-RS report to the first communication device is used, and the first precoding matrix is ​​calculated.

[0394] In this implementation, for the aperiodic reference signal resources used to measure the precoding matrix, the delay deviation measured and reported by the first communication device (and received by the target network device) at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger the reporting of reference signal resources or before the target network device sends reference signal resources to the first communication device can be predefined as the first delay deviation. Thus, the first communication device and the target network device can determine the delay deviation for both parties to perform delay compensation on the channel without further interaction.

[0395] For example, when the reference signal resource is a periodic or semi-persistent reference signal resource, the first delay deviation is the delay deviation of the most recent report no later than the latest measurement resource time used to measure the channel state information of the channel state information reference resource.

[0396] Specifically, as shown in Figure 21, for periodic CSI-RS or semi-persistent CSI-RS reporting, the standard defines the measurement time of the CSI reference resource. The dashed box indicates the measurement and reporting time of CSI-RS no later than this time, assuming they are CSI-RS1, CSI-RS2, and CSI-RS3 respectively. CSI-RS3 corresponds to the latest measurement resource time used to measure channel state information. Before CSI-RS3, the first communication device measured and reported delay deviation 1, delay deviation 2, and delay deviation 3. Therefore, the most recently reported delay deviation before CSI-RS3 is delay deviation 3. The first communication device and the target network device use delay deviation 3 for channel compensation by default.

[0397] In this implementation, for periodic or semi-persistent reference signal resources used to measure the precoding matrix, the delay deviation reported most recently before the measurement resource time for measuring channel state information (CSI reference resource) no later than the latest time of the CSI reference resource can be predefined as the first delay deviation. Thus, the first communication device and the target network device can determine the delay deviation for both parties to perform delay compensation on the channel without further interaction. This ensures both the timeliness of the first delay deviation and that the first communication device has enough time to compensate the precoding matrix to obtain the first precoding matrix.

[0398] 1902: The first communication device sends the instruction information of the first precoding matrix to the target network device.

[0399] Correspondingly, the second communication device receives indication information from the first precoded matrix of the first communication device.

[0400] 1903: The second communication device uses the first delay deviation to compensate for the delay of the PDSCH.

[0401] In this embodiment of the application, when the second communication device receives the delay deviation reported by the first communication device, it can perform delay compensation on the PDSCH according to the predefined delay deviation for delay compensation, without waiting for the first precoding matrix sent by the first communication device.

[0402] 1904: The second communication device sends downlink data precoded by the first precoding matrix to the first communication device via the delay-compensated PDSCH.

[0403] As can be seen, in this embodiment of the application, the first communication device (or terminal device) and the target network device (or the second communication device) can be instructed in a pre-configured manner to use which delay deviation (here, the first delay deviation) reported by the first communication device for channel delay compensation. For example, the specific delay deviation used can be determined based on the type of reference signal resource for measuring the precoding matrix, or it can be predefined by the protocol, so that the target network device can apply the precoding matrix (here, the first precoding matrix) calculated after compensation to the PDSCH for downlink transmission. This eliminates the need for additional signaling interaction between the first communication device and the target network device to align which delay compensation to use to compensate the channel and the precoding matrix, thereby helping to ensure the timeliness of downlink transmission of the target network device and saving signaling overhead.

[0404] It should be noted that Figures 19-21 use the first time delay deviation as an example for detailed explanation. The measurement of the first frequency deviation and the implementation of the first frequency deviation compensation precoding matrix (or the predefined frequency deviation compensation channel and precoding matrix) can be referred to the specific description of the first time delay deviation. The definition of the corresponding technical features can also be defined with reference to the corresponding explanation of the first time delay deviation, and the same or similar beneficial effects can be achieved.

[0405] The methods of the embodiments of this application have been described above, and the apparatus of the embodiments of this application is provided below.

[0406] Please refer to Figure 22, which is a schematic diagram of a communication device provided in an embodiment of this application. As shown in Figure 22, the device includes a first transceiver unit 2201; wherein, the first transceiver unit 2201 is used for:

[0407] The terminal device receives reference signal resources from multiple network devices; the reference signal resources of any one of the network devices, network device A, are used by the terminal device to measure the deviation information of network device A relative to a reference network device among the multiple network devices; the deviation information includes at least one of time delay deviation, frequency deviation, and phase deviation.

[0408] Send uplink control information (UCI) to at least one network device; the UCI includes deviation information of at least one network device relative to a reference network device among a plurality of network devices; at least one network device is a network device other than the reference network device among a plurality of network devices.

[0409] In this context, the deviation information of at least one network device relative to the reference network device is based on the identifier arrangement corresponding to at least one network device.

[0410] In one possible implementation, for at least one first network device in at least one network device that needs to measure delay deviation, the UCI also includes first indication information for at least one first network device; the reference network device includes a first reference network device; the first reference network device is a reference network device for measuring delay deviation; the first indication information of any one of the at least one first network devices B is used to indicate whether the delay deviation of the first network device B relative to the first reference network device plus the delay spread is greater than or equal to the length of a cyclic prefix;

[0411] Wherein, the first indication information of each first network device and the delay deviation of each first network device relative to the first reference network device are arranged adjacently; or...

[0412] The first indication information of at least one first network device is arranged based on the identifier corresponding to at least one first network device, and all the first indication information in the UCI takes precedence over all the deviation information in the UCI.

[0413] In one possible implementation, the UCI also includes second indication information; the second indication information is used to indicate the first reference network device; the second indication information is arranged in order of priority over the first indication information of at least one first network device and the deviation information of at least one network device relative to the reference network device.

[0414] In one possible implementation, where at least one first network device includes a target first network device that needs to measure frequency deviation and / or phase deviation, and / or where at least one network device includes a second network device that only needs to measure frequency deviation and / or phase deviation, the reference network device further includes a second reference network device; the second reference network device is a reference network device for measuring frequency deviation and / or phase deviation.

[0415] The UCI also includes third indication information, which is used to indicate the second reference network device; the third indication information takes precedence over the deviation information of at least one network device relative to the reference network device.

[0416] In one possible implementation, where at least one network device only needs to measure frequency deviation and / or phase deviation, the reference network device includes a second reference network device; the second reference network device is a reference network device for measuring frequency deviation and / or phase deviation.

[0417] The UCI also includes third indication information; the third indication information is used to indicate the second reference network device; the third indication information takes precedence over the frequency deviation and / or phase deviation of at least one network device relative to the second reference network device.

[0418] In one possible implementation, when each network device corresponds to one reference signal resource, the identifier for each network device is the identifier of the reference signal resource; when each network device corresponds to multiple reference signal resources, the identifier for each network device is the identifier of the same set of reference signal resources to which the multiple reference signal resources belong.

[0419] It should be noted that the implementation of each unit described in FIG22 can also be referred to the corresponding descriptions of the embodiments shown in FIG4 to FIG15. Furthermore, the beneficial effects of the communication device described in FIG22 can be referred to the corresponding descriptions of the embodiments shown in FIG4 to FIG15, and will not be repeated here.

[0420] Please refer to Figure 23, which is a schematic diagram of another communication device provided in an embodiment of this application. As shown in Figure 23, the device includes a second transceiver unit 2301; the second transceiver unit 2301 is used for:

[0421] A reference signal resource is sent to the terminal device; the reference signal resource is used by the terminal device to measure deviation information of the network device relative to a reference network device among a plurality of network devices; the deviation information includes at least one of time delay deviation, frequency deviation, and phase deviation; the plurality of network devices includes network devices.

[0422] Receive uplink control information (UCI) from the terminal device; the UCI includes deviation information of at least one network device relative to a reference network device; the at least one network device is a network device other than the reference network device among a plurality of network devices;

[0423] In this context, the deviation information of at least one network device relative to the reference network device is based on the identifier arrangement corresponding to at least one network device.

[0424] In one possible implementation, for at least one first network device in at least one network device that needs to measure delay deviation, the UCI also includes first indication information for at least one first network device; the reference network device includes a first reference network device; the first reference network device is a reference network device for measuring delay deviation; the first indication information of any one of the at least one first network devices B is used to indicate whether the delay deviation of the first network device B relative to the first reference network device plus the delay spread is greater than or equal to the length of a cyclic prefix;

[0425] Wherein, the first indication information of each first network device and the delay deviation of each first network device relative to the first reference network device are arranged adjacently; or...

[0426] The first indication information of at least one first network device is arranged based on the identifier corresponding to at least one first network device, and all the first indication information in the UCI takes precedence over all the deviation information in the UCI.

[0427] In one possible implementation, the UCI also includes second indication information; the second indication information is used to indicate the first reference network device; the second indication information is arranged in order of priority over the first indication information of at least one first network device and the deviation information of at least one network device relative to the reference network device.

[0428] In one possible implementation, where at least one first network device includes a target first network device that needs to measure frequency deviation and / or phase deviation, and / or where at least one network device includes a second network device that only needs to measure frequency deviation and / or phase deviation, the reference network device further includes a second reference network device; the second reference network device is a reference network device for measuring frequency deviation and / or phase deviation.

[0429] The UCI also includes third indication information, which is used to indicate the second reference network device; the third indication information takes precedence over the deviation information of at least one network device relative to the reference network device.

[0430] In one possible implementation, where at least one network device only needs to measure frequency deviation and / or phase deviation, the reference network device includes a second reference network device; the second reference network device is a reference network device for measuring frequency deviation and / or phase deviation.

[0431] The UCI also includes third indication information; the third indication information is used to indicate the second reference network device; the third indication information takes precedence over the frequency deviation and / or phase deviation of at least one network device relative to the second reference network device.

[0432] In one possible implementation, when each network device corresponds to one reference signal resource, the identifier for each network device is the identifier of the reference signal resource; when each network device corresponds to multiple reference signal resources, the identifier for each network device is the identifier of the same set of reference signal resources to which the multiple reference signal resources belong.

[0433] In one possible implementation, where the network device is a first network device B, and the first indication information of at least one first network device is arranged based on the identifier corresponding to at least one first network device, and the first indication information of at least one first network device takes precedence over the deviation information of at least one network device relative to a reference network device, as shown in FIG24, the device further includes a fourth processing unit 2302; the fourth processing unit 2302 is used for:

[0434] Decode the sequence segment containing the first indication information of the first network device B in the UCI to obtain the first indication information of the first network device B;

[0435] Based on the first indication information of the first network device B, the decoding priority of the delay deviation of the first network device B relative to the first reference network device is determined.

[0436] It should be noted that the implementation of each unit described in FIG23 or FIG24 can also refer to the corresponding description of the embodiments shown in FIG4 to FIG15. Furthermore, the beneficial effects of the communication device described in FIG23 or FIG24 can be described with reference to the corresponding description of the embodiments shown in FIG4 to FIG15, and will not be repeated here.

[0437] Please refer to Figure 25, which is a schematic diagram of the structure of a first communication device provided in an embodiment of this application. As shown in Figure 25, the device includes a third transceiver unit 2501 and a first processing unit 2502; wherein:

[0438] The first processing unit 2502 is configured to determine a first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device;

[0439] The third transceiver unit 2501 is used to send indication information of the first precoding matrix, as well as information on the first delay deviation and / or the first frequency deviation, to the target network device; and to receive fourth indication information from the target network device; the fourth indication information is used to indicate whether the target network device has received the information on the first delay deviation and / or the first frequency deviation.

[0440] In one possible implementation, the fourth indication information is transmitted via the Physical Downlink Shared Channel (PDSCH), Downlink Control Information (DCI), Media Access Control-Control Element (MAC-CE) signaling, or Radio Resource Control (RRC) signaling.

[0441] In one possible implementation, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device.

[0442] In one possible implementation, the third transceiver unit 2501 is further configured to: send capability information to the target network device; the capability information is used to indicate that the first communication device supports the capability to measure at least one of the following to obtain the first precoding matrix and report the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources.

[0443] In one possible implementation, the third transceiver unit 2501 is further configured to: send a fifth indication information to the target network device; the fifth indication information is used to instruct the first communication device to perform delay compensation on the channel between the first communication device and the target network device based on the first delay deviation.

[0444] In one possible implementation, if the fourth indication information indicates that the target network device has not received information about the first delay deviation and / or the first frequency deviation, the third transceiver unit 2501 is further configured to:

[0445] Retransmit the information about the first delay deviation and / or the first frequency deviation to the target network device; or...

[0446] Send indication information of a second precoding matrix to the target network device. The second precoding matrix is ​​a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on the channel between the first communication device and the target network device.

[0447] It should be noted that the implementation of each unit described in FIG25 can also correspond to the descriptions of the embodiments shown in FIG16 to FIG18. Furthermore, the beneficial effects of the communication device described in FIG25 can be described in the corresponding descriptions of the embodiments shown in FIG16 to FIG18, and will not be repeated here.

[0448] Please refer to Figure 26, which is a schematic diagram of the structure of a second communication device provided in an embodiment of this application. As shown in Figure 26, the device includes a fourth transceiver unit 2601; wherein, the fourth transceiver unit 2601 is used for:

[0449] The system receives indication information from a first precoding matrix from a first communication device. The first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation. The first delay deviation indicates the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and a reference network device. The first frequency deviation indicates the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device.

[0450] Send a fourth indication message to the first communication device; the fourth indication message is used to indicate whether the target network device has received information on the first delay deviation and / or the first frequency deviation.

[0451] In one possible implementation, the fourth indication information is transmitted via the Physical Downlink Shared Channel (PDSCH), Downlink Control Information (DCI), Media Access Control-Control Element (MAC-CE) signaling, or Radio Resource Control (RRC) signaling.

[0452] In one possible implementation, the first precoding matrix is ​​obtained by the first communication device measuring the reference signal resources sent by the target network device.

[0453] In one possible implementation, the fourth transceiver unit 2601 is further configured to:

[0454] Receive capability information from a first communication device; the capability information is used to indicate that the first communication device supports the ability to measure at least one of the following to obtain a first precoding matrix and report the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources.

[0455] In one possible implementation, the fourth transceiver unit 2601 is further configured to: receive fifth indication information from the first communication device; the fifth indication information is used to instruct the first communication device to perform delay compensation on the channel between the first communication device and the target network device according to the first delay deviation;

[0456] When the fourth indication information indicates that the target network device has received the information of the first delay deviation, the PDSCH is the PDSCH after delay compensation by the second communication device based on the starting subcarrier and utilizing the first delay deviation; the fourth transceiver unit 2601 is also used for:

[0457] Downlink data precoded by the first precoding matrix is ​​sent to the first communication device via PDSCH.

[0458] In one possible implementation, if the fourth indication information indicates that the target network device has not received information about the first delay deviation and / or the first frequency deviation, the fourth transceiver unit 2601 is further configured to:

[0459] The PDSCH is time-delayed and / or frequency-compensated using a second time delay offset and / or a second frequency offset, and the third precoding matrix is ​​determined as the precoding matrix of the downlink data transmitted via the time-delayed and / or frequency-compensated PDSCH; the second time delay offset and / or the second frequency offset are the time delay and / or frequency offsets received by the target network device from the first communication device before the information of the first time delay offset and / or the first frequency offset; the third precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device based on the second time delay offset and / or the second frequency offset; or...

[0460] Receive information about the first time delay deviation and / or the first frequency deviation retransmitted by the first communication device; or...

[0461] Receive a second precoding matrix from the first communication device; the second precoding matrix is ​​a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on the channel between the first communication device and the target network device.

[0462] It should be noted that the implementation of each unit described in FIG26 can also correspond to the description of the embodiments shown in FIG16 to FIG18. Furthermore, the beneficial effects of the communication device described in FIG26 can be described in the corresponding descriptions of the embodiments shown in FIG16 to FIG18, and will not be repeated here.

[0463] Please refer to Figure 27, which is a schematic diagram of another first communication device provided in an embodiment of this application. As shown in Figure 27, the device includes a fifth transceiver unit 2701 and a second processing unit 2702; wherein:

[0464] The second processing unit 2702 is used to determine a first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device according to a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or predefined according to the protocol.

[0465] The fifth transceiver unit 2701 is used to send indication information of the first precoding matrix to the target network device.

[0466] In one possible implementation, the first time delay deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the time delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device. The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0467] In one possible implementation, the first time delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first time delay deviation is the most recently reported time delay deviation no later than the latest measurement resource time for measuring channel state information of the channel state information reference resource. The first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the most recently reported frequency deviation no later than the latest measurement resource time for measuring channel state information of the channel state information reference resource.

[0468] It should be noted that the implementation of each unit described in FIG27 can also correspond to the descriptions of the embodiments shown in FIG19 to FIG21. Furthermore, the beneficial effects of the communication device described in FIG27 can be described in the corresponding descriptions of the embodiments shown in FIG19 to FIG21, and will not be repeated here.

[0469] Please refer to Figure 28, which is a schematic diagram of another second communication device provided in an embodiment of this application. As shown in Figure 28, the device includes a sixth transceiver unit 2801 and a third processing unit 2802; wherein:

[0470] The third processing unit 2802 is used to perform delay compensation on the Physical Downlink Shared Channel (PDSCH) using a first delay deviation and / or a first frequency deviation; the first delay deviation and / or the first frequency deviation are measured by the first communication device and transmitted to the target network device; the first delay deviation is used to indicate the deviation of the delay and / or frequency between the first communication device and the target network device relative to the delay and / or frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol.

[0471] The sixth transceiver unit 2801 is used to receive indication information of the first precoding matrix from the first communication device; the first precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device according to the first time delay deviation and / or the first frequency deviation; and sends downlink data precoded by the first precoding matrix to the first communication device through the time delay and / or frequency compensated PDSCH.

[0472] In one possible implementation, the first time delay deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the time delay deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device. The first frequency deviation is determined based on the type of reference signal resource used to measure the precoding matrix, including: when the reference signal resource is an aperiodic reference signal resource, the first time delay deviation is the frequency deviation measured by the first communication device at the moment before the target network device sends downlink control information (DCI) to the first communication device to trigger reference signal resource reporting or before the target network device sends reference signal resources to the first communication device.

[0473] In one possible implementation, the first time delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first time delay deviation is the most recently reported time delay deviation no later than the latest measurement resource time for measuring channel state information of the channel state information reference resource. The first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix, including: when the reference signal resource is a periodic or semi-persistent reference signal resource, the first frequency deviation is the most recently reported frequency deviation no later than the latest measurement resource time for measuring channel state information of the channel state information reference resource.

[0474] It should be noted that the implementation of each unit described in FIG28 can also correspond to the descriptions of the embodiments shown in FIG19 to FIG21. Furthermore, the beneficial effects of the communication device described in FIG28 can be described in the corresponding descriptions of the embodiments shown in FIG19 to FIG21, and will not be repeated here.

[0475] Based on the description of the above method and device embodiments, this application also provides a communication device. Please refer to FIG29, which is a schematic diagram of the structure of a communication device provided in this application embodiment. The communication device includes at least one processor 2901. Optionally, the communication device may further include an interface circuit 2902 (shown as dashed lines in the figure), with the processor 2901 and the interface circuit 2902 coupled to each other. It is understood that the interface circuit 2902 can be a transceiver or an input / output interface. Optionally, the communication device may further include at least one memory 2903 (shown as dashed lines in the figure), which is used to store instructions (such as one or more computer programs) executed by at least one processor 2901, or to store input data required for at least one processor 2901 to execute instructions, or to store data generated after at least one processor 2901 executes instructions. This communication device can be used in related steps of a communication method. The at least one processor 2901 in the communication device is used to read the computer program code stored in the at least one memory 2903 and execute the method of any one of the embodiments shown in FIG4 to FIG21.

[0476] At least one memory 2903 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM).

[0477] At least one processor 2901 may be one or more central processing units (CPUs). If processor 2901 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0478] For example, when the communication device is used to implement the functions of a terminal device, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 and perform the following operations:

[0479] The terminal device receives reference signal resources from multiple network devices; the reference signal resources of any one of the network devices, network device A, are used by the terminal device to measure the deviation information of network device A relative to a reference network device among the multiple network devices; the deviation information includes at least one of time delay deviation, frequency deviation, and phase deviation.

[0480] Send uplink control information (UCI) to at least one network device; the UCI includes deviation information of at least one network device relative to a reference network device among a plurality of network devices; at least one network device is a network device other than the reference network device among a plurality of network devices.

[0481] In this context, the deviation information of at least one network device relative to the reference network device is based on the identifier arrangement corresponding to at least one network device.

[0482] For example, when the communication device is used to implement the functions of a network device, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 and perform the following operations:

[0483] A reference signal resource is sent to the terminal device; the reference signal resource is used by the terminal device to measure deviation information of the network device relative to a reference network device among a plurality of network devices; the deviation information includes at least one of time delay deviation, frequency deviation, and phase deviation; the plurality of network devices includes network devices.

[0484] Receive uplink control information (UCI) from the terminal device; the UCI includes deviation information of at least one network device relative to a reference network device; the at least one network device is a network device other than the reference network device among a plurality of network devices;

[0485] In this context, the deviation information of at least one network device relative to the reference network device is based on the identifier arrangement corresponding to at least one network device.

[0486] For example, when the communication device is used to implement the functions of the first communication device (or terminal device) described above, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 described above, and perform the following operations:

[0487] A first precoding matrix is ​​determined; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device;

[0488] Send indication information of the first precoding matrix, as well as information on the first delay deviation and / or the first frequency deviation, to the target network device;

[0489] Receive a fourth indication message from the target network device; the fourth indication message is used to indicate whether the target network device has received information on the first delay deviation and / or the first frequency deviation.

[0490] For example, when the communication device is used to implement the functions of the second communication device (or target network device) described above, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 described above, and perform the following operations:

[0491] The system receives indication information from a first precoding matrix from a first communication device. The first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation. The first delay deviation indicates the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and a reference network device. The first frequency deviation indicates the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device.

[0492] Send a fourth indication message to the first communication device; the fourth indication message is used to indicate whether the target network device has received information on the first delay deviation and / or the first frequency deviation.

[0493] For example, when the communication device is used to implement the functions of the first communication device (or terminal device) described above, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 described above, and perform the following operations:

[0494] A first precoding matrix is ​​determined; the first precoding matrix is ​​obtained by the first communication device after performing delay and / or frequency compensation on the channel between the first communication device and the target network device based on a first delay deviation and / or a first frequency deviation; the first delay deviation is used to indicate the deviation of the delay between the first communication device and the target network device relative to the delay between the first communication device and the reference network device; the first frequency deviation is used to indicate the deviation of the frequency between the first communication device and the target network device relative to the frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol.

[0495] Send the indication information of the first precoding matrix to the target network device.

[0496] For example, when the communication device is used to implement the functions of the second communication device (or target network device) described above, at least one processor 2901 in the communication device can be used to read one or more programs stored in the at least one memory 2903 described above, and perform the following operations:

[0497] Delay compensation is performed on the Physical Downlink Shared Channel (PDSCH) using a first delay deviation and / or a first frequency deviation; the first delay deviation and / or the first frequency deviation are measured by the first communication device and transmitted to the target network device; the first delay deviation is used to indicate the deviation of the delay and / or frequency between the first communication device and the target network device relative to the delay and / or frequency between the first communication device and the reference network device; the first delay deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; the first frequency deviation is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol.

[0498] Receive indication information from the first communication device for the first precoding matrix; the first precoding matrix is ​​obtained by the first communication device after performing time delay and / or frequency compensation on the channel between the first communication device and the target network device based on the first time delay deviation and / or the first frequency deviation;

[0499] Downlink data precoded by the first precoding matrix is ​​transmitted to the first communication device via a PDSCH after time delay and / or frequency compensation.

[0500] It should be noted that the implementation of each operation can also correspond to the description of the method in any of the embodiments shown in Figures 4 to 21.

[0501] It should be noted that although the communication device shown in FIG29 only illustrates at least one processor 2901, interface circuit 2902, and at least one memory 2903, those skilled in the art should understand that in specific implementations, the communication device may also include other devices necessary for normal operation. Furthermore, depending on specific needs, those skilled in the art should understand that the communication device may also include hardware devices for implementing other additional functions. Moreover, those skilled in the art should understand that the communication device may only include the devices necessary for implementing the embodiments of this application, and not necessarily all the devices shown in FIG29.

[0502] This application also provides a chip, including: a processor for calling and running a computer program from a memory, causing a device with the chip installed to perform the method described in any of the embodiments shown in Figures 4 to 21 above. This chip may be a chip in a communication device.

[0503] This application also provides a computer-readable storage medium (memory) storing a computer program that, when executed, implements the method described in any of the embodiments shown in Figures 4 to 21. It is understood that the computer-readable storage medium here may include built-in storage media within a device, or it may include extended storage media supported by the device. The computer-readable storage medium provides storage space containing the device's operating system. Furthermore, one or more computer programs suitable for loading and execution by the device's processor are also stored in this storage space. It should be noted that the computer-readable storage medium here may be high-speed RAM or non-volatile memory, such as at least one disk storage device; optionally, it may also be at least one computer-readable storage medium located remotely from the aforementioned processor.

[0504] This application also provides a computer program product, which includes computer program code. When the computer program code is run by a communication device, the method flow described in any one of the embodiments in Figures 4 to 21 is implemented.

[0505] Please refer to Figure 30, which is a schematic diagram of a baseband hardware provided in an embodiment of this application. As shown in Figure 30, the baseband can be implemented using a processing system including one or more processors. The processor may include a microprocessor, microcontroller, CPU, graphics processing unit (GPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to various functions. That is, the processor used in the baseband can be used to implement any one or more of the processes described below. It should be understood that the communication device shown in Figure 29 can be the baseband shown in Figure 30.

[0506] Processing systems can be implemented using a bus architecture, typically represented by a bus. A bus can include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus couples various circuits together, including one or more processors (typically represented by a processor), memory, and computer-readable media (typically represented by a computer-readable storage medium). The bus can also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known in the art and will not be described further here. The bus interface provides the interface between the bus and transceivers, as well as between the bus and the interface.

[0507] A transceiver provides a communication interface or means for communicating with various other devices via a wireless transmission medium. The transceiver may be coupled to an antenna array, and the transceiver and antenna array may be used together for communication with a corresponding network type. At least one interface (e.g., a network interface and / or a user interface) provides a communication interface or means for communication via an internal bus or via an external transmission medium.

[0508] The processor manages the bus and general processing, including executing software stored on a computer-readable storage medium. When executed by the processor, the software causes the processing system to perform the various functions described below for any particular device. Functions that can be implemented by the processor, memory, and computer-readable medium may include: encoding, decoding, rate matching, rate dematching, scrambling, descrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), inverse discrete Fourier transform (IDFT), precoding, resource element (RE) mapping, channel equalization, RE demapping, digital beamforming (BF), adding CP, removing CP, and so on.

[0509] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0510] It should be understood that the processor mentioned in the embodiments of this application can be a CPU, or other general-purpose processors, DSPs, ASICs, FPGAs, or other PLDs, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0511] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory can be ROM, Programmable Read-Only Memory (PROM), EPROM, Electrically Erasable Programmable Read-Only Memory (EEPROM), or flash memory. Volatile memory can be RAM, which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchlink Dynamic Random Access Memory (SLDRAM), and Direct Rambus RAM (DR RAM).

[0512] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated into the processor.

[0513] It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

[0514] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0515] 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 exemplary. 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 through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0516] 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.

[0517] 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. 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.

[0518] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes 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, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0519] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0520] The modules in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0521] 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

A communication method characterized by comprising: The method comprises: receiving reference signal resources from a plurality of network devices; the reference signal resources of any one network device A in the plurality of network devices are used for a terminal device to measure deviation information of the network device A relative to a reference network device in the plurality of network devices; the deviation information comprises at least one of a time delay deviation, a frequency deviation and a phase deviation; sending uplink control information (UCI) to at least one network device; the UCI comprises deviation information of the at least one network device relative to a reference network device in the plurality of network devices; the at least one network device is a network device other than the reference network device in the plurality of network devices; wherein the deviation information of the at least one network device relative to the reference network device is arranged based on an identifier corresponding to the at least one network device. The method of claim 1, wherein For at least one first network device in the at least one network device that needs to measure a time delay deviation, the UCI further comprises first indication information of the at least one first network device; the reference network device comprises a first reference network device; the first reference network device is a reference network device for measuring a time delay deviation; the first indication information of any one first network device B in the at least one first network device is used to indicate whether a time delay deviation of the first network device B relative to the first reference network device plus a time delay spread is greater than or equal to the length of one cyclic prefix; wherein the first indication information of each first network device is arranged adjacent to the time delay deviation of each first network device relative to the first reference network device; or, the first indication information of the at least one first network device is arranged based on an identifier corresponding to the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the deviation information in the UCI. The method according to claim 2, characterized in that The UCI further comprises second indication information; the second indication information is used to indicate the first reference network device; the second indication information is arranged in priority to the first indication information of the at least one first network device and the deviation information of the at least one network device relative to the reference network device. The method according to claim 3, characterized in that In the case where the at least one first network device comprises a target first network device that needs to measure a frequency deviation and / or a phase deviation, and / or in the case where the at least one network device comprises a second network device that only needs to measure a frequency deviation and / or a phase deviation, the reference network device further comprises a second reference network device; the second reference network device is a reference network device for measuring a frequency deviation and / or a phase deviation; The UCI further comprises third indication information, the third indication information is used to indicate the second reference network device; the third indication information is arranged in priority to the deviation information of the at least one network device relative to the reference network device. The method of claim 1, wherein In a case that the at least one network device only needs to measure frequency offset and / or phase offset, the reference network device comprises a second reference network device; the second reference network device is a reference network device for measuring frequency offset and / or phase offset; The UCI further comprises third indication information; the third indication information is used to indicate the second reference network device; the third indication information is arranged in priority to frequency offset and / or phase offset of the at least one network device relative to the second reference network device. The method according to any one of claims 1 to 5, characterized in that In a case that the reference signal resource corresponding to each network device is one, the identification corresponding to each network device is an identification of the reference signal resource; In a case that the reference signal resource corresponding to each network device is multiple, the identification corresponding to each network device is an identification of a same reference signal resource set to which the multiple reference signal resources belong. A communication method characterized by comprising: The method comprises: sending, to a terminal device, a reference signal resource; the reference signal resource is used for the terminal device to measure offset information of a network device relative to a reference network device in multiple network devices; the offset information comprises at least one of time delay offset, frequency offset and phase offset; the multiple network devices comprise the network device; receiving, from the terminal device, uplink control information (UCI); the UCI comprises offset information of at least one network device relative to the reference network device; the at least one network device is a network device other than the reference network device in the multiple network devices; The offset information of the at least one network device relative to the reference network device is arranged based on an identification corresponding to the at least one network device. The method of claim 7, wherein For at least one first network device in the at least one network device which needs to measure time delay offset, the UCI further comprises first indication information of the at least one first network device; the reference network device comprises a first reference network device; the first reference network device is a reference network device for measuring time delay offset; the first indication information of any first network device B in the at least one first network device is used to indicate whether time delay offset of the first network device B relative to the first reference network device plus time delay spread is greater than or equal to a length of one cyclic prefix; The first indication information of each first network device is arranged adjacent to time delay offset of each first network device relative to the first reference network device; or The first indication information of the at least one first network device is arranged based on an identification corresponding to the at least one first network device, and all the first indication information in the UCI is arranged in priority to all the offset information in the UCI. The method of claim 8, wherein The UCI further comprises second indication information; the second indication information is used to indicate the first reference network device; the second indication information is arranged in priority to the first indication information of the at least one first network device and the offset information of the at least one network device relative to the reference network device. The method of claim 9, wherein In the case that the at least one first network device comprises a target first network device which needs to measure the frequency deviation and / or the phase deviation, and / or in the case that the at least one network device comprises a second network device which only needs to measure the frequency deviation and / or the phase deviation, the reference network device further comprises a second reference network device; the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation; The UCI further comprises third indication information, the third indication information being used for indicating the second reference network device; the third indication information is arranged in priority to the deviation information of the at least one network device relative to the reference network device. The method of claim 7, wherein In the case that the at least one network device only needs to measure the frequency deviation and / or the phase deviation, the reference network device comprises a second reference network device; the second reference network device is a reference network device for measuring the frequency deviation and / or the phase deviation; The UCI further comprises third indication information; the third indication information is used for indicating the second reference network device; the third indication information is arranged in priority to the frequency deviation and / or the phase deviation of the at least one network device relative to the second reference network device. The method according to any one of claims 7-11, characterized in that In the case that the reference signal resource corresponding to each network device is one, the identification corresponding to each network device is the identification of the reference signal resource; In the case that the reference signal resource corresponding to each network device is multiple, the identification corresponding to each network device is the identification of the same reference signal resource set to which the multiple reference signal resources belong. The method of claim 8, wherein In the case that the network device is the first network device B, the first indication information of the at least one first network device is arranged based on the identification corresponding to the at least one first network device, and the first indication information of the at least one first network device is arranged in priority to the deviation information of the at least one network device relative to the reference network device, the method further comprises: Decoding the sequence segment in which the first indication information of the first network device B in the UCI is located, to obtain the first indication information of the first network device B; Determining the decoding priority of the time delay deviation of the first network device B relative to the first reference network device based on the first indication information of the first network device B. A communication method applied to a first communication device, characterized in that, The method comprises: Determining a first precoding matrix; the first precoding matrix is obtained by the first communication device performing time delay and / or frequency compensation on a channel between the first communication device and a target network device according to a first time delay deviation and / or a first frequency deviation; the first time delay deviation is used for indicating a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; the first frequency deviation is used for indicating a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; sending, to the target network device, indication information of the first precoding matrix, and information of the first time delay bias and / or the first frequency bias; receiving fourth indication information from the target network device; the fourth indication information is used to indicate whether the target network device receives the information of the first time delay bias and / or the first frequency bias. The method of claim 14, wherein The fourth indication information is sent through a physical downlink shared channel (PDSCH), downlink control information (DCI), media access control-control element (MAC-CE) signaling, or radio resource control (RRC) signaling. The method according to claim 14 or 15, characterized in that The first precoding matrix is obtained by measuring reference signal resources sent by the target network device. The method according to any one of claims 14-16, characterized in that The method further comprises: sending, to the target network device, capability information; the capability information is used to indicate that the first communication device supports measuring at least one of the following to obtain the first precoding matrix and reporting the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources. The method according to any one of claims 14-17, characterized in that The method further comprises: sending, to the target network device, fifth indication information; the fifth indication information is used to indicate a starting subcarrier of time delay compensation of a channel between the first communication device and the target network device according to the first time delay bias; or a protocol pre-defined starting frequency domain position of time delay compensation, wherein the protocol pre-defined starting point of time delay compensation is a frequency domain starting point of a channel state information reference resource. The method according to any one of claims 14-18, characterized in that In a case where the fourth indication information indicates that the target network device does not receive the information of the first time delay bias and / or the first frequency bias, the method further comprises: resending, to the target network device, the information of the first time delay bias and / or the first frequency bias; or sending, to the target network device, indication information of a second precoding matrix; the second precoding matrix is a precoding matrix obtained by the first communication device without time delay and / or frequency compensation of a channel between the first communication device and the target network device. A communication method applied to a second communication device, characterized in that, The method comprises: receiving, from a first communication device, indication information of a first precoding matrix; the first precoding matrix is obtained by the first communication device after time delay and / or frequency compensation of a channel between the first communication device and a target network device according to a first time delay bias and / or a first frequency bias; the first time delay bias is used to indicate a bias of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; and the first frequency bias is used to indicate a bias of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; sending, to the first communication device, fourth indication information; the fourth indication information is used to indicate whether the target network device receives the information of the first time delay bias and / or the first frequency bias. The method of claim 20, wherein The fourth indication information is sent through a physical downlink shared channel (PDSCH), downlink control information (DCI), media access control-control element (MAC-CE) signaling, or radio resource control (RRC) signaling. The method according to claim 20 or 21, characterized in that The first precoding matrix is obtained by measuring reference signal resources sent by the target network device by the first communication device. The method according to any one of claims 20-22, characterized in that The method further comprises: receiving capability information from the first communication device; the capability information is used to indicate that the first communication device supports measuring at least one of the following to obtain the first precoding matrix and reporting the first precoding matrix: periodic reference signal resources, semi-persistent reference signal resources, and aperiodic reference signal resources. The method according to any one of claims 21-23, characterized in that The method further comprises: receiving fifth indication information from the first communication device; the fifth indication information is used to indicate a starting subcarrier for the first communication device to perform time delay compensation on a channel between the first communication device and the target network device according to the first time delay bias; or a starting frequency domain position of protocol predefined time delay compensation; in the protocol predefined manner, the starting point of time delay compensation is the frequency domain starting point of the channel state information reference resource; in a case where the fourth indication information indicates that the target network device has received information of the first time delay bias, the PDSCH is a PDSCH that the second communication device uses to perform time delay compensation based on the starting subcarrier or the frequency domain position predefined by the protocol and based on the first time delay bias; the method further comprises: sending, to the first communication device through the PDSCH, downlink data that is precoded by the first precoding matrix. The method according to any one of claims 20-23, characterized in that in a case where the fourth indication information indicates that the target network device has not received information of the first time delay bias and / or the first frequency bias, the method further comprises: determining a third precoding matrix as a precoding matrix of downlink data sent by the PDSCH after time delay and / or frequency compensation, by using a second time delay bias and / or a second frequency bias to perform time delay and / or frequency compensation on the PDSCH; the second time delay bias and / or the second frequency bias is a time delay and / or frequency bias received by the target network device from the first communication device before the information of the first time delay bias and / or the first frequency bias; the third precoding matrix is obtained by the first communication device after performing time delay and / or frequency compensation on a channel between the first communication device and the target network device according to the second time delay bias and / or the second frequency bias; or receiving the information of the first time delay bias and / or the first frequency bias re-sent by the first communication device; or receiving a second precoding matrix from the first communication device; the second precoding matrix is a precoding matrix obtained by the first communication device without performing time delay and / or frequency compensation on a channel between the first communication device and the target network device. A communication method applied to a first communication device, characterized in that, The method comprises: determining a first precoding matrix; the first precoding matrix is obtained by the first communication device compensating a channel between the first communication device and a target network device in time delay and / or frequency after a first time delay deviation and / or a first frequency deviation; the first time delay deviation is used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; the first frequency deviation is used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; the first time delay deviation is determined based on a type of a reference signal resource for measuring a precoding matrix or is predefined according to a protocol; the first frequency deviation is determined based on the type of the reference signal resource for measuring the precoding matrix or is predefined according to the protocol; sending indication information of the first precoding matrix to the target network device. The method of claim 26, wherein The first time delay deviation is determined based on the type of the reference signal resource for measuring the precoding matrix, including: in a case where the reference signal resource is aperiodic reference signal resource, the first time delay deviation is a time delay deviation measured by the first communication device at a time point before the target network device triggers the reference signal resource to be reported by sending downlink control information DCI to the first communication device or the target network device sends the reference signal resource. The first frequency deviation is determined based on the type of the reference signal resource for measuring the precoding matrix, including: in a case where the reference signal resource is aperiodic reference signal resource, the first time delay deviation is a frequency deviation measured by the first communication device at a time point before the target network device triggers the reference signal resource to be reported by sending downlink control information DCI to the first communication device or the target network device sends the reference signal resource. The method of claim 26, wherein The first time delay deviation is determined based on the type of the reference signal resource for measuring the precoding matrix, including: in a case where the reference signal resource is periodic or semi-persistent reference signal resource, the first time delay deviation is a time delay deviation reported at a latest time point before a latest measurement resource time point of a channel state information reference resource for measuring channel state information; The first frequency deviation is determined based on the type of the reference signal resource for measuring the precoding matrix, including: in a case where the reference signal resource is periodic or semi-persistent reference signal resource, the first frequency deviation is a frequency deviation reported at a latest time point before a latest measurement resource time point of a channel state information reference resource for measuring channel state information. A communication method applied to a second communication device, characterized in that, The method comprises: compensate, by using a first time delay bias and / or a first frequency bias, a physical downlink shared channel (PDSCH); the first time delay bias and / or the first frequency bias are measured by a first communication device and sent to a target network device; the first time delay bias is used to indicate a bias of a time delay and / or a frequency between the first communication device and the target network device relative to a time delay and / or a frequency between the first communication device and a reference network device; the first time delay bias is determined based on a type of a reference signal resource of a precoding matrix or predefined according to a protocol; the first frequency bias is determined based on the type of the reference signal resource of the precoding matrix or predefined according to the protocol; receive, from the first communication device, indication information of a first precoding matrix; the first precoding matrix is obtained by the first communication device after compensating, by using the first time delay bias and / or the first frequency bias, a channel between the first communication device and the target network device; send, to the first communication device, downlink data precoded by the first precoding matrix through the PDSCH after the time delay and / or the frequency compensation. The method of claim 29, wherein The first time delay bias is determined based on a type of a reference signal resource of a precoding matrix, including: in a case that the reference signal resource is aperiodic, the first time delay bias is a time delay bias measured by the first communication device at a time point before a previous time point at which the target network device sends downlink control information (DCI) triggering the reference signal resource to be reported or the target network device sends the reference signal resource to the first communication device; the first frequency bias is determined based on the type of the reference signal resource of the precoding matrix, including: in a case that the reference signal resource is aperiodic, the first time delay bias is a frequency bias measured by the first communication device at the time point before the previous time point at which the target network device sends the DCI triggering the reference signal resource to be reported or the target network device sends the reference signal resource to the first communication device. The method of claim 29, wherein The first time delay bias is determined based on a type of a reference signal resource of a precoding matrix, including: in a case that the reference signal resource is periodic or semi-persistent, the first time delay bias is a latest time delay bias reported not later than a time point of a latest measurement resource of a channel state information reference resource for measuring channel state information; the first frequency bias is determined based on the type of the reference signal resource of the precoding matrix, including: in a case that the reference signal resource is periodic or semi-persistent, the first frequency bias is a latest frequency bias reported not later than the time point of the latest measurement resource of the channel state information reference resource for measuring the channel state information. A communication device, characterized by The device includes a first transceiver unit; wherein the first transceiver unit is configured to: receive reference signal resources from a plurality of network devices; reference signal resources of any one network device A in the plurality of network devices are used for a terminal device to measure deviation information of the network device A relative to a reference network device in the plurality of network devices; the deviation information includes at least one of a time delay deviation, a frequency deviation, and a phase deviation; send uplink control information (UCI) to at least one network device; the UCI includes deviation information of the at least one network device relative to a reference network device in the plurality of network devices; the at least one network device is a network device other than the reference network device in the plurality of network devices; wherein the deviation information of the at least one network device relative to the reference network device is based on an identity arrangement corresponding to the at least one network device. A communication device, characterized by The apparatus includes a second transceiver unit; wherein the second transceiver unit is configured to: send reference signal resources to a terminal device; the reference signal resources are used for the terminal device to measure deviation information of a network device relative to a reference network device in a plurality of network devices; the deviation information includes at least one of a time delay deviation, a frequency deviation, and a phase deviation; the plurality of network devices includes the network device; receive uplink control information (UCI) from the terminal device; the UCI includes deviation information of at least one network device relative to the reference network device; the at least one network device is a network device other than the reference network device in the plurality of network devices; wherein the deviation information of the at least one network device relative to the reference network device is based on an identity arrangement corresponding to the at least one network device. A first communication device, characterized in that The apparatus includes a third transceiver unit and a first processing unit; The first processing unit is configured to determine a first precoding matrix; the first precoding matrix is obtained by time delay and / or frequency compensation on a channel between the first communication apparatus and a target network device according to a first time delay deviation and / or a first frequency deviation; The first time delay deviation is used to indicate a deviation of a time delay between the first communication apparatus and the target network device relative to a time delay between the first communication apparatus and a reference network device; the first frequency deviation is used to indicate a deviation of a frequency between the first communication apparatus and the target network device relative to a frequency between the first communication apparatus and the reference network device; The third transceiver unit is configured to send indication information of the first precoding matrix, and information of the first time delay deviation and / or the first frequency deviation to the target network device, and receive fourth indication information from the target network device; The fourth indication information is used to indicate whether the target network device receives the information of the first time delay deviation and / or the first frequency deviation. A second communication device, characterized in that The apparatus includes a fourth transceiver unit; wherein the fourth transceiver unit is configured to: receiving indication information of a first precoding matrix from a first communication device; the first precoding matrix is obtained by the first communication device performing time delay and / or frequency compensation on a channel between the first communication device and a target network device according to a first time delay offset and / or a first frequency offset; the first time delay offset is used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; the first frequency offset is used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; sending fourth indication information to the first communication device; the fourth indication information is used to indicate whether the target network device receives information of the first time delay offset and / or the first frequency offset. A first communication device, characterized in that The device comprises a fifth transceiver unit and a second processing unit; The second processing unit is configured to determine a first precoding matrix; the first precoding matrix is obtained by the first communication device performing time delay and / or frequency compensation on a channel between the first communication device and a target network device according to a first time delay offset and / or a first frequency offset; The first time delay offset is used to indicate a deviation of a time delay between the first communication device and the target network device relative to a time delay between the first communication device and a reference network device; the first frequency offset is used to indicate a deviation of a frequency between the first communication device and the target network device relative to a frequency between the first communication device and the reference network device; The first time delay offset is determined based on a type of reference signal resource for measuring a precoding matrix or is predefined according to a protocol; the first frequency offset is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; The fifth transceiver unit is configured to send indication information of the first precoding matrix to the target network device. A second communication device, characterized in that The device comprises a sixth transceiver unit and a third processing unit; The third processing unit is configured to perform time delay compensation on a physical downlink shared channel (PDSCH) by using a first time delay offset and / or a first frequency offset; the first time delay offset and / or the first frequency offset are measured by a first communication device and sent to a target network device; the first time delay offset is used to indicate a deviation of a time delay and / or a frequency between the first communication device and the target network device relative to a time delay and / or a frequency between the first communication device and a reference network device; The first time delay offset is determined based on a type of reference signal resource for measuring a precoding matrix or is predefined according to a protocol; the first frequency offset is determined based on the type of reference signal resource for measuring the precoding matrix or is predefined according to the protocol; The sixth transceiver unit is configured to receive indication information of a first precoding matrix from the first communication device, wherein the first precoding matrix is obtained by the first communication device according to the first time delay bias and / or the first frequency bias to compensate the channel between the first communication device and the target network device in time delay and / or frequency; and the downlink data precoded by the first precoding matrix is sent to the first communication device through the PDSCH after time delay and / or frequency compensation. A communication device characterized by comprising: The communication device comprises at least one processor coupled to at least one memory storing one or more computer programs, and the at least one processor is configured to enable the communication device to implement the method of any one of claims 1-6, 7-13, 14-19, 20-25, 26-28, or 29-31 when the one or more computer programs are executed by the at least one processor. A computer-readable storage medium, characterized by The computer readable storage medium stores a computer program for execution by a device, and the computer program, when executed, implements the method of any one of claims 1-6, 7-13, 14-19, 20-25, 26-28, or 29-31. A computer program product, characterized by The computer program product, when executed by a device, causes the device to perform the method of any one of claims 1-6, 7-13, 14-19, 20-25, 26-28, or 29-31.

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