Communication method and apparatus

Abstract

The present application provides a communication method and apparatus, capable of reducing the loss of information of a phase difference between transmission reception points (TRPs) and a reference TRP. The method comprises: on the basis of a downlink reference signal, a terminal device determining phase difference information between an i-th TRP among I TRPs and a reference TRP; and sending first information to a network device, wherein the first information comprises a plurality of fields, the plurality of fields are used for indicating the phase difference information between the i-th TRP among the I TRPs and the reference TRP, different fields among the plurality of fields correspond to different transmission priorities, I is a positive integer, and i is a positive integer from 1 to I.

Description

A communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411097811.8, filed on August 9, 2024, and entitled “A communication method and apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] In a communication system, in order to ensure the reciprocity of uplink and downlink channels, network devices with multi-antenna transmission capability are needed to perform reciprocity correction between each antenna port. In the scenario of multi-station coherent joint transmission (CJT), each antenna port between the multi-stations will use joint coherent precoding to send downlink data to the terminal device. Taking two transmission reception points (TRPs) as an example, including TRP1 and TRP2, in order to ensure the reciprocity of uplink and downlink channels, TPR1 and TPR2 need to perform reciprocity correction between each antenna port in the TPR, and also need to perform additional reciprocity correction between each antenna port between the TRPs. In the prior art, when performing reciprocity correction between the TRPs, the terminal device needs to measure the downlink reference signal of each TRP, obtain the phase difference between each TRP and the reference TRP, and report the phase difference between each TRP and the reference TRP to the network device, and the network device performs reciprocity correction between the TRPs based on the phase difference.

[0005] Currently, the terminal device reports the phase difference between the TRP and the reference TRP through uplink control information (UCI), and UCI has a certain packet loss probability, so how to reduce the information loss of the phase difference between the TRP and the reference TRP becomes a problem worthy of study. SUMMARY

[0006] The present application provides a communication method and apparatus, which can reduce the information loss of the phase difference between the TRP and the reference TRP.

[0007] In a first aspect, the present application provides a communication method applied to a terminal device, comprising: determining phase difference information between an i-th transmission reception point (TRP) and a reference TRP in I TRPs according to a downlink reference signal; wherein I is a positive integer, i is a positive integer from 1 to I; and sending first information to a network device, the first information comprising a plurality of fields, the plurality of fields being used to indicate the phase difference information between the i-th TRP and the reference TRP in the I TRPs, and different fields in the plurality of fields correspond to different transmission priorities.

[0008] Optionally, the first information can be UCI. In the above design, based on the transmission priorities of different fields, the transmission priorities of different parts of the phase difference information are configured, so that when UCI packet loss occurs, the parts of the phase difference information with low transmission priorities are preferentially lost, which can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0009] In a possible design, the phase difference information between the i-th TRP and the reference TRP comprises wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP. Based on this, the first information comprises a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further comprises a second field, or the first indication information indicates that the first information further comprises the second field and a third field; wherein the second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP, and the third field is used to carry the subband phase difference information between the i-th TRP and the reference TRP.

[0010] In the above design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that when UCI packet loss occurs, the subband phase difference information is preferentially lost, and the wideband phase difference information is retained, which can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0011] In one possible design, the subband phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands, and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the 1st subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N. Optionally, the possible design can also be described as: the phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands, which can be used as wideband phase information; and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the 1st subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N.

[0012] Based on this, the first information includes a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field; where the second field is used to carry subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands; and the third field is used to carry the difference.

[0013] In the above design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. In the division of transmission priority, the subband phase difference information is greater than the difference between the subband phase difference information, so that when UCI packet loss occurs, the difference between the subband phase difference information is lost first, and the subband phase difference information is retained. Such a design can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0014] In one possible design, the first information includes a first part and a second part, and the transmission priority of the first part is higher than the transmission priority of the second part; where the first field is included in the first part, and the second field and the third field are included in the second part.

[0015] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP on each of N subbands, where N is an integer greater than 1. Based on this, the first information includes a fourth field and a fifth field, the transmission priority of the fourth field is higher than that of the fifth field, the fourth field is used to carry subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands, and the fifth field is used to carry subband phase difference information between the ith TRP and the reference TRP on N-M subbands of the N subbands; where the N-M subbands include subbands other than the M subbands in the N subbands, and M is a positive integer smaller than N.

[0016] In the above design, the fourth field and the fifth field are used to carry subband phase difference information corresponding to different subbands, and based on the transmission priorities of the fields, transmission priorities corresponding to different subbands can be achieved, so that when UCI packet loss occurs, subband phase difference information corresponding to part of the subbands (M subbands) can be preserved, and in this way, information loss caused by UCI packet loss on the phase difference between TRPs can be reduced.

[0017] In a possible design, the M subbands include: a first subband of the N subbands; or a first subband and an Nth subband of the N subbands; or a first subband and an (N-1)th subband of the N subbands; or an (N-M+1)th subband and an Nth subband of the N subbands. wherein is a rounding up symbol.

[0018] In a possible design, the fifth field includes a first subfield and a second subfield, the transmission priority of the first subfield is higher than or lower than that of the second subfield, the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on an xth subband of the N-M subbands, and the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on a yth subband of the N-M subbands; where x is an odd number less than or equal to N-M, and y is an even number less than or equal to N-M.

[0019] In a possible design, the first information includes a sixth field, the transmission priority of the sixth field is higher than that of the fourth field, and the sixth field is used to carry second indication information, where the second indication information indicates P reference signal ports; where P is a positive integer. ​

[0020] In a possible design, the wideband phase difference information between the ith TRP and the reference TRP includes wideband phase difference information corresponding to each of the P reference signal ports; and the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information corresponding to each of the P reference signal ports.

[0021] In a possible design, the phase difference information between the ith TRP and the reference TRP includes phase difference information corresponding to a pth reference signal port of the P reference signal ports; where the P is an integer greater than 1, and the p is an integer from 1 to the P. Based on this, the first information includes P fields, and a pth field of the P fields is used to carry the phase difference information corresponding to the pth reference signal port.

[0022] In the above design, a transmission priority of the pth field of the P fields is higher than a transmission priority of the p+1th field. Based on the transmission priority of the field, transmission priorities corresponding to different reference signal ports can be implemented, so that when UCI packet loss occurs, phase difference information corresponding to part of the ports can be reserved, which can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0023] In a possible design, the first information includes a seventh field, and a transmission priority of the seventh field is higher than that of the P fields. The seventh field is used to carry at least one of the following: second indication information indicating the P reference signal ports; third indication information indicating that the phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; and fourth indication information indicating a correspondence between the P reference signal ports and the P fields.

[0024] In a possible design, the first information includes a first part and a second part, and a transmission priority of the first part is higher than that of the second part. The seventh field is included in the first part, and the P fields are included in the second part.

[0025] In a second aspect, the present application provides a communication method applied to a network device, comprising: receiving first information from a terminal device, wherein the first information comprises a plurality of fields, and the plurality of fields are used to indicate phase difference information between an i-th transmission reception point (TRP) and a reference TRP in I TRPs; wherein I is a positive integer, i is a positive integer from 1 to I; and determining the phase difference information between the i-th TRP and the reference TRP in the I TRPs according to the first information.

[0026] Optionally, the first information can be UCI. In the above design, based on the transmission priority of different fields, the transmission priority of different parts of the phase difference information is configured, so that when UCI packet loss occurs, the part of the phase difference information with low transmission priority is preferentially lost, which can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0027] In a possible design, the phase difference information between the i-th TRP and the reference TRP comprises wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP. Based on this, the first information comprises a first field used to carry first indication information, wherein the first indication information indicates that the first information further comprises a second field, or the first indication information indicates that the first information further comprises the second field and a third field; wherein the second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP, and the third field is used to carry the subband phase difference information between the i-th TRP and the reference TRP.

[0028] In the above design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that when UCI packet loss occurs, the subband phase difference information is preferentially lost, and the wideband phase difference information is retained, which can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0029] In one possible design, the subband phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands, and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the 1st subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N. Optionally, the possible design can also be described as: the phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands, which can be used as wideband phase information; and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the 1st subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N.

[0030] Based on this, the first information includes a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field; where the second field is used to carry subband phase difference information between the ith TRP and the reference TRP on a 1st subband of N subbands; and the third field is used to carry the difference.

[0031] In the above design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. In the division of transmission priority, the subband phase difference information is greater than the difference between the subband phase difference information, so that when UCI packet loss occurs, the difference between the subband phase difference information is lost first, and the subband phase difference information is retained. Such a design can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0032] In one possible design, the first information includes a first part and a second part, and the transmission priority of the first part is higher than the transmission priority of the second part; where the first field is included in the first part, and the second field and the third field are included in the second part.

[0033] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP on each of N subbands, where N is an integer greater than 1. Based on this, the first information includes a fourth field and a fifth field, the transmission priority of the fourth field is higher than that of the fifth field, the fourth field is used to carry subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands, and the fifth field is used to carry subband phase difference information between the ith TRP and the reference TRP on N-M subbands of the N subbands; where the N-M subbands include subbands other than the M subbands in the N subbands, and M is a positive integer smaller than N.

[0034] In the above design, the fourth field and the fifth field are used to carry subband phase difference information corresponding to different subbands, and based on the transmission priorities of the fields, transmission priorities corresponding to different subbands can be achieved, so that when UCI packet loss occurs, subband phase difference information corresponding to part of the subbands (M subbands) can be preserved, and in this way, information loss caused by UCI packet loss on the phase difference between TRPs can be reduced.

[0035] In a possible design, the M subbands include: a first subband of the N subbands; or a first subband and an Nth subband of the N subbands; or a first subband and an (N-M)th subband of the N subbands; or an (M+1)th subband and an Nth subband of the N subbands. wherein is a rounding up symbol.

[0036] In a possible design, the fifth field includes a first subfield and a second subfield, the transmission priority of the first subfield is higher than or lower than that of the second subfield, the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on an xth subband of the N-M subbands, and the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on a yth subband of the N-M subbands; where x is an odd number less than or equal to N-M, and y is an even number less than or equal to N-M.

[0037] In a possible design, the first information includes a sixth field, the transmission priority of the sixth field is higher than that of the fourth field, and the sixth field is used to carry second indication information, where the second indication information indicates P reference signal ports; where P is a positive integer. ​

[0038] In a possible design, the wideband phase difference information between the ith TRP and the reference TRP includes wideband phase difference information corresponding to each of the P reference signal ports; and the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information corresponding to each of the P reference signal ports.

[0039] In a possible design, the phase difference information between the ith TRP and the reference TRP includes phase difference information corresponding to a pth reference signal port of the P reference signal ports; where the P is an integer greater than 1, and the p is an integer from 1 to the P. Based on this, the first information includes P fields, and a pth field of the P fields is used to carry the phase difference information corresponding to the pth reference signal port.

[0040] In the above design, a transmission priority of the pth field of the P fields is higher than a transmission priority of a (p+1)th field. Based on the transmission priority of the field, transmission priorities corresponding to different reference signal ports can be implemented, so that when UCI packet loss occurs, phase difference information corresponding to part of the ports can be reserved, which can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0041] In a possible design, the first information includes a seventh field, and a transmission priority of the seventh field is higher than that of the P fields. The seventh field is used to carry at least one of the following: second indication information indicating the P reference signal ports; third indication information indicating that the phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; and fourth indication information indicating a correspondence between the P reference signal ports and the P fields.

[0042] In a possible design, the first information includes a first part and a second part, and a transmission priority of the first part is higher than that of the second part. The seventh field is included in the first part, and the P fields are included in the second part.

[0043] In a third aspect, the present application provides a communication method, and embodiments of the present application provide a communication device, which can be a terminal device, a device, a module or a chip in a terminal device, or a device that can be used with a terminal device. In one design, the communication device can include a module that performs the method / operation / step / action described in the first aspect one-to-one, which can be a hardware circuit, software, or a combination of hardware circuit and software. In one design, the communication device can include a processing module and a communication module, and the communication module includes a sending unit and a receiving unit. Optionally, the processing module can also be replaced by a processing unit.

[0044] The processing module is configured to determine phase difference information between an i-th TRP of I TRPs and a reference TRP according to a downlink reference signal, where I is a positive integer, and i is a positive integer ranging from 1 to I; and the communication module is configured to send first information to a network device, where the first information includes a plurality of fields, and the plurality of fields are used to indicate the phase difference information between the i-th TRP of the I TRPs and the reference TRP, and different fields of the plurality of fields correspond to different transmission priorities.

[0045] Optionally, the first information can be UCI. In the above design, based on the transmission priorities of different fields, the transmission priorities of different parts of the phase difference information are configured, so that when UCI packet loss occurs, the parts of the phase difference information with low transmission priorities are preferentially lost. Such a design can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0046] In one possible design, the phase difference information between the i-th TRP and the reference TRP includes wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP. Based on this, the first information includes a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field; where the second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP, and the third field is used to carry the subband phase difference information between the i-th TRP and the reference TRP.

[0047] In the design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that the subband phase difference information is lost preferentially when UCI packet loss occurs, and the wideband phase difference information is retained. Such a design can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0048] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands, and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N. Alternatively, the possible design can also be described as: the phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands, which can be used as wideband phase information; and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N.

[0049] Based on this, the first information includes a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field; the second field is used to carry subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands; and the third field is used to carry the difference.

[0050] In the design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that the subband phase difference information is lost preferentially when UCI packet loss occurs, and the wideband phase difference information is retained. Such a design can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0051] In a possible design, the first information includes a first part and a second part, a transmission priority of the first part is higher than a transmission priority of the second part; the first field is included in the first part, and the second field and the third field are included in the second part.

[0052] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP on each of N subbands, where N is an integer greater than 1. Based on this, the first information includes a fourth field and a fifth field, a transmission priority of the fourth field is higher than a transmission priority of the fifth field, the fourth field is used to carry subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands, and the fifth field is used to carry subband phase difference information between the ith TRP and the reference TRP on N-M subbands of the N subbands; where the N-M subbands include subbands other than the M subbands in the N subbands, and M is a positive integer less than N.

[0053] In the design, the fourth field and the fifth field are used to carry subband phase difference information corresponding to different subbands, and based on the transmission priorities of the fields, transmission priorities corresponding to different subbands can be implemented, so that when UCI packet loss occurs, subband phase difference information corresponding to part of the subbands (M subbands) can be preserved, and in this way, information loss caused by UCI packet loss on the phase difference between TRPs can be reduced.

[0054] In a possible design, the M subbands include: a first subband in the N subbands; or a first subband and an Nth subband in the N subbands; or a first subband and an (N-M)th subband in the N subbands; or a first subband, an (N-M)th subband, and an Nth subband in the N subbands. wherein is a ceiling symbol.

[0055] In a possible design, the fifth field includes a first subfield and a second subfield, a transmission priority of the first subfield is greater than or less than a transmission priority of the second subfield, the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on an xth subband of the N-M subbands, and the second subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on a yth subband of the N-M subbands; where x is an odd number less than or equal to N-M, and y is an even number less than or equal to N-M. ​

[0056] In a possible design, the first information includes a sixth field, a transmission priority of the sixth field is higher than that of the fourth field, and the sixth field is used to carry second indication information, where the second indication information indicates P reference signal ports; where P is a positive integer.

[0057] In a possible design, the wideband phase difference information between the ith TRP and the reference TRP includes wideband phase difference information corresponding to each of the P reference signal ports, and the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information corresponding to each of the P reference signal ports.

[0058] In a possible design, the phase difference information between the ith TRP and the reference TRP includes phase difference information corresponding to a pth reference signal port of the P reference signal ports; where P is an integer greater than 1, and p is an integer from 1 to P. Based on this, the first information includes P fields, and a pth field of the P fields is used to carry phase difference information corresponding to the pth reference signal port between the ith TRP and the reference TRP.

[0059] In the above design, a transmission priority of the pth field of the P fields is higher than that of the p+1th field. Based on the transmission priority of the field, transmission priorities corresponding to different reference signal ports can be implemented, so that when UCI packet loss occurs, phase difference information corresponding to part of the ports can be retained, which can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0060] In a possible design, the first information includes a seventh field, a transmission priority of the seventh field is higher than that of the P fields, and the seventh field is used to carry at least one of the following: second indication information, the second indication information indicating the P reference signal ports; third indication information, the first indication information indicating that phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; and fourth indication information, the third indication information indicating a correspondence between the P reference signal ports and the P fields.

[0061] In a possible design, the first information includes a first part and a second part, a transmission priority of the first part is higher than that of the second part; where the seventh field is included in the first part, and the P fields are included in the second part.

[0062] In a fourth aspect, the present application provides a communication method, and embodiments of the present application provide a communication device, which can be a network device, a device, a module or a chip in the network device, or a device capable of matching the network device. In a design, the communication device can include a module corresponding to the method / operation / step / action described in the first aspect, which can be a hardware circuit, software or a combination of hardware circuit and software. In a design, the communication device can include a processing module and a communication module including a sending unit and a receiving unit. Optionally, the processing module can also be replaced by a processing unit.

[0063] The communication module is configured to receive first information from the terminal device, the first information including a plurality of fields, and the plurality of fields are used to indicate phase difference information between an i-th TRP and a reference TRP in I TRPs; wherein I is a positive integer, and i is a positive integer from 1 to I; and the processing module is configured to determine the phase difference information between the i-th TRP and the reference TRP in the I TRPs according to the first information.

[0064] Optionally, the first information can be UCI. In the above design, based on the transmission priority of different fields, the transmission priority of different parts of the phase difference information is configured, so that when UCI packet loss occurs, the part of the phase difference information with low transmission priority is lost preferentially. Such a design can reduce the information loss caused by UCI packet loss on the phase difference between TRPs.

[0065] In a possible design, the phase difference information between the i-th TRP and the reference TRP includes wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP. Based on this, the first information includes a first field used to carry first indication information, the first indication information indicating that the first information further includes a second field, or the first indication information indicating that the first information further includes the second field and a third field; wherein the second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP, and the third field is used to carry the subband phase difference information between the i-th TRP and the reference TRP.

[0066] In the design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that the subband phase difference information is lost preferentially when UCI packet loss occurs, and the wideband phase difference information is retained. Such a design can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0067] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands, and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N. Alternatively, the possible design can also be described as: the phase difference information between the ith TRP and the reference TRP includes: subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands, which can be used as wideband phase information; and a difference between subband phase difference information between the ith TRP and the reference TRP on an nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands; where N is an integer greater than 1, and n is an integer from 1 to N.

[0068] Based on this, the first information includes a first field, the first field is used to carry first indication information, the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field; the second field is used to carry subband phase difference information between the ith TRP and the reference TRP on a first subband of N subbands; and the third field is used to carry the difference.

[0069] In the design, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field. The transmission priority of the wideband phase difference information can be greater than the transmission priority of the subband phase difference information, so that the subband phase difference information is lost preferentially when UCI packet loss occurs, and the wideband phase difference information is retained. Such a design can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0070] In a possible design, the first information includes a first part and a second part, a transmission priority of the first part is higher than a transmission priority of the second part; the first field is included in the first part, and the second field and the third field are included in the second part.

[0071] In a possible design, the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP on each of N subbands, where N is an integer greater than 1. Based on this, the first information includes a fourth field and a fifth field, a transmission priority of the fourth field is higher than a transmission priority of the fifth field, the fourth field is used to carry subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands, and the fifth field is used to carry subband phase difference information between the ith TRP and the reference TRP on N-M subbands of the N subbands; where the N-M subbands include subbands other than the M subbands in the N subbands, and M is a positive integer less than N.

[0072] In the design, the fourth field and the fifth field are used to carry subband phase difference information corresponding to different subbands, and based on the transmission priorities of the fields, transmission priorities corresponding to different subbands can be implemented, so that when UCI packet loss occurs, subband phase difference information corresponding to part of the subbands (M subbands) can be preserved, and in this way, information loss caused by UCI packet loss on the phase difference between TRPs can be reduced.

[0073] In a possible design, the M subbands include: a first subband in the N subbands; or a first subband and an Nth subband in the N subbands; or a first subband and an (N-M)th subband in the N subbands; or an (N-M)th subband and an Nth subband in the N subbands; where M is a positive integer less than N. is a rounding up symbol.

[0074] In a possible design, the fifth field includes a first subfield and a second subfield, a transmission priority of the first subfield is greater than or less than a transmission priority of the second subfield, the first subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on an xth subband of the N-M subbands, and the second subfield is used to carry subband phase difference information between the ith TRP and the reference TRP on a yth subband of the N-M subbands; where x is an odd number less than or equal to N-M, and y is an even number less than or equal to N-M. ​​

[0075] In a possible design, the first information includes a sixth field, a transmission priority of the sixth field is higher than that of the fourth field, and the sixth field is used to carry second indication information, where the second indication information indicates P reference signal ports; where P is a positive integer.

[0076] In a possible design, the wideband phase difference information between the ith TRP and the reference TRP includes wideband phase difference information corresponding to each of the P reference signal ports, and the subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information corresponding to each of the P reference signal ports.

[0077] In a possible design, the phase difference information between the ith TRP and the reference TRP includes phase difference information corresponding to a pth reference signal port of the P reference signal ports; where P is an integer greater than 1, and p is an integer from 1 to P. Based on this, the first information includes P fields, and a pth field of the P fields is used to carry phase difference information corresponding to the pth reference signal port between the ith TRP and the reference TRP.

[0078] In the above design, a transmission priority of the pth field of the P fields is higher than that of the p+1th field. Based on the transmission priority of the field, transmission priorities corresponding to different reference signal ports can be implemented, so that when UCI packet loss occurs, phase difference information corresponding to part of the ports can be retained, which can reduce information loss caused by UCI packet loss on the phase difference between TRPs.

[0079] In a possible design, the first information includes a seventh field, a transmission priority of the seventh field is higher than that of the P fields, and the seventh field is used to carry at least one of the following: second indication information, the second indication information indicating the P reference signal ports; third indication information, the first indication information indicating that phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; and fourth indication information, the third indication information indicating a correspondence between the P reference signal ports and the P fields.

[0080] In a possible design, the first information includes a first part and a second part, a transmission priority of the first part is higher than that of the second part; where the seventh field is included in the first part, and the P fields are included in the second part.

[0081] In a fifth aspect, the present application provides a communication apparatus, including at least one processor and a memory; the memory is configured to store computer programs or instructions, when the apparatus is running, the at least one processor executes the computer programs or instructions, so that the communication apparatus executes the method in the first aspect or the embodiments of the first aspect, or executes the method in the second aspect or the embodiments of the second aspect.

[0082] In a sixth aspect, the present application provides another communication apparatus, including: a logic circuit and an input / output interface; the input / output interface can be understood as an interface circuit, and the logic circuit can be configured to run code instructions to execute the method in the first aspect or the embodiments of the first aspect, or execute the method in the second aspect or the embodiments of the second aspect.

[0083] In a seventh aspect, the present application further provides a computer readable storage medium, the computer readable storage medium stores computer readable instructions, when the computer readable instructions are running on a computer, so that the computer executes the method in the first aspect or any possible design in the first aspect, or executes the method in the second aspect or any possible design in the second aspect.

[0084] In an eighth aspect, the present application provides a computer program product including instructions, when the computer program product is running on a computer, so that the computer executes the method in the first aspect or the embodiments of the first aspect, or executes the method in the second aspect or the embodiments of the second aspect.

[0085] In a ninth aspect, the present application provides a chip system, the chip system includes a processor, and can further include a memory, so as to implement the method in the first aspect or any possible design in the first aspect, or execute the method in the second aspect or any possible design in the second aspect. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0086] In a tenth aspect, the present application provides a communication system, the system includes a terminal device and a network device, and the communication system is configured to execute the method in the first aspect or any possible design in the first aspect, or execute the method in the second aspect or any possible design in the second aspect.

[0087] The technical effects achieved by the fifth aspect to the tenth aspect can refer to the technical effects achieved by the first aspect or the corresponding possible design in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0088] FIG. 1 is a schematic diagram of an architecture of a wireless communication system;

[0089] FIG. 2 is a schematic diagram of terminal reciprocity correction and intra-TRP reciprocity correction;

[0090] FIG. 3 is a schematic diagram of inter-TRP reciprocity correction;

[0091] FIG. 4A is a flow chart of a method for obtaining a phase calibration coefficient;

[0092] FIG. 4B is a schematic diagram of interaction between TRP i, TRP nref and UE;

[0093] FIG. 5 is a flow chart of another method for obtaining a phase calibration coefficient;

[0094] FIG. 6 is a flow chart of a communication method according to an embodiment of the present application;

[0095] FIG. 7 is a schematic diagram of a linear function corresponding to sub-band phase difference information;

[0096] FIG. 8 is a schematic diagram of a communication apparatus according to an embodiment of the present application;

[0097] FIG. 9 is a schematic diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0098] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the drawings.

[0099] At least one (item) referred to in the present application indicates one (item) or more (items). More (items) means two (items) or more than two (items). "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship. In addition, it should be understood that although the terms first, second, etc. may be used to describe various objects in the present application, these objects should not be limited to these terms. These terms are only used to distinguish various objects from each other.

[0100] The terms "including", "containing", "having" and their conjugates, as used throughout the description and in the claims, shall be understood to be open terms, i.e., meaning "including, but not limited to". Only the transitional phrases "consisting of and "consisting essentially of are closed or semi-closed transitional phrases, respectively, meaning "consisting of only" and "consisting essentially of only" the listed steps or components. It should be noted that as used in the specification and the appended claims, the articles "a", "an" and "the" can make reference to one or more instances. As used in the specification and the appended claims, the connection term "first" does not imply that a second will come later, but rather that the first came earlier than the second. As used in the specification and the appended claims, the term "or" is meant to be inclusive and not exclusive, unless explicitly indicated to the contrary. As used in the specification and the appended claims, the terms "comprising", "comprise", "comprised of" and "comprising" are used synonymously to mean one or more steps or components.

[0101] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as a universal mobile telecommunications system (UMTS), a wireless local area network (WLAN), a wireless fidelity (Wi-Fi) system, a 4th generation (4G) mobile communication system such as a long term evolution (LTE) system, a 5th generation (5G) mobile communication system such as a new radio (NR) system, and a future evolved communication system.

[0102] The present application will present various aspects, embodiments or features around a system that can include a plurality of devices, components, modules, etc. It should be understood and appreciated that each of the various systems can include additional devices, components, modules, etc., and / or can not include all of the devices, components, modules, etc., discussed in connection with the figures. Additionally, a combination of these approaches can be used.

[0103] To facilitate understanding of the embodiments of the present application, FIG. 1 shows a possible, non-limiting schematic diagram of a communication system. As shown in FIG. 1, the communication system 10 includes a radio access network (RAN) 100, and optionally, the communication system 10 further includes a core network (CN) 200 and an Internet 300. Hereinafter, the RAN 100 related to the embodiments of the present application will be mainly introduced.

[0104] The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1, collectively referred to as 110) and at least one terminal (e.g., 120a-120j in FIG. 1, collectively referred to as 120). Among them, 110a is a base station, 110b is a micro base station, 120a, 120e, 120f and 120j are mobile phones, 120b is a car, 120c is a fuel dispenser, 120d is a home access point (HAP) arranged indoors or outdoors, 120g is a notebook computer, 120h is a printer, and 120i is a drone.

[0105] Other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1), can also be included in the RAN 100. The terminals 120 are connected to the RAN nodes 110 in a wireless manner. The RAN nodes 110 are connected to the core network 200 in a wireless or wired manner. The core network devices in the core network 200 and the RAN nodes 110 in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the wireless access network.

[0106] The RAN 100 can be a 3rd generation partnership project (3GPP) related cellular system, such as a 4G, 5G mobile communication system, or a future-oriented evolution system. The RAN 100 can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system that combines two or more of the above systems.

[0107] (1) RAN node

[0108] The RAN node 110 can also be referred to as a RAN entity or an access node, etc., which forms part of the communication system to help terminals to access wirelessly. The RAN nodes 110 in the communication system 10 can be of the same type or of different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative, e.g., the network element 120i in Figure 1 can be a helicopter or a drone, which can be configured to be a mobile base station, for those terminals 120j accessing to the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN node 110 and the terminal 120 are sometimes both referred to as communication apparatuses, e.g., the network elements 110a and 110b in Figure 1 can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal functions.

[0109] The RAN node can also be referred to as a network device. In the present application, the network device is used for description unless otherwise specified.

[0110] In a possible scenario, the network device can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a WiFi system, etc. The network device can be a macro base station (e.g., 110a in Figure 1), a micro base station or an indoor station (e.g., 110b in Figure 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the network device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g., a cloud platform). The network device in the present application can also be a logical node, a logical module or software that can implement all or part of the functions of the network device.

[0111] In another possible scenario, a terminal device accesses a network device to perform wireless communication. The network device can be a base station (BS), an access point (AP), a radio base station (RBS), a Node-B, a site controller (S-C), a base transceiver station (BTS), a base station controller (BSC), a relay station, a network controller, an Access and Mobility Management Function (AMF), a New Radio Base Station (NR BS), 5G NB, gNB, or other term. The network device can also be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), a radio unit (RU), or other term.

[0112] (2) Terminal device

[0113] A terminal device can access the above communication system, and a terminal device with wireless transceiver function or a chip or chip system provided in the terminal device. The terminal device can also be referred to as a user equipment (UE), a terminal, a user apparatus, an access terminal device, a user unit, a user station, a mobile station, a mobile station (MS), a remote station, a remote terminal device, a mobile device, a user terminal device, a terminal device unit, a terminal device station, a terminal device apparatus, a wireless communication device, a user agent, or a user apparatus.

[0114] For example, the terminal device in the embodiments of the present application can be a mobile phone, a personal digital assistant (PDA) computer, a laptop computer, a tablet computer (Pad), a drone, a computer with wireless transceiver function, a machine type communication (MTC) terminal device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an internet of things (IoT) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home (such as a game console, a smart television, a smart speaker, a smart refrigerator, and fitness equipment, etc.), and a vehicle-mounted terminal device. The embodiments of the present application do not limit the device form of the terminal device.

[0115] (3) Communication between terminal device and network device

[0116] The communication between the terminal device and the network device follows a certain protocol layer structure. For example, the protocol layer structure can include a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, and a physical layer (PHY) layer, etc. In the 3rd generation partnership project (3GPP) standard, layer 1 (L1) can refer to the PHY layer, layer 2 can refer to the MAC layer, and layer 3 can refer to the RRC layer. For specific descriptions of the above-mentioned various protocol layers, please refer to the relevant technical specifications of the 3rd generation partnership project (3GPP).

[0117] The processing functions of the CU and the DU can be divided according to protocol layers of the wireless network. For example, the functions of the PDCP layer and above protocol layers are arranged in the CU, and the functions of the protocol layers below the PDCP layer (for example, the RLC layer and the MAC layer, etc.) are arranged in the DU. It can be understood that the division of the processing functions of the CU and the DU according to the protocol layers is only an example, and the division can also be performed in other manners, for example, the functions of the protocol layers above the RLC layer are arranged in the CU, and the functions of the protocol layers below the RLC layer are arranged in the DU, for example, the CU or the DU can be divided into more protocol layers, and for example, the CU or the DU can also be divided into partial processing functions of the protocol layers. The embodiments of the present application do not limit this.

[0118] In the embodiments of the present application, "sending information to (a terminal device)" can be understood as that the destination of the information is the terminal device, and can include directly or indirectly sending information to the terminal device. "Receiving information from (a terminal device)" can be understood as that the source of the information is the terminal device, and can include directly or indirectly receiving information from the terminal device. The information can be processed as necessary between the source and the destination of the information, for example, format change, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, and will not be described here.

[0119] The communication system and the service scenario described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0120] The following introduces the technical features related to the present application.

[0121] 1. Antenna port: The antenna port can be simply referred to as a port. It can be understood as a transmitting antenna identified by a receiving device, or a transmitting antenna that can be distinguished in space. One antenna port can be pre-configured for each virtual antenna, each virtual antenna can be a weighted combination of multiple physical antennas, and each antenna port can correspond to one reference signal. Therefore, each antenna port can be referred to as a reference signal port, for example, a sounding reference signal (SRS) port, etc.

[0122] 2. Coherent Joint Transmission (CJT): This refers to multiple stations, such as multiple Transmission Points (TRPs), transmitting data to a terminal device via coherent transmission. The multiple TRPs know all the data information and their channel state information (CSI) with the terminal device. Therefore, these multiple TRPs are like distributed antenna arrays, capable of jointly precoding the same layer of data to be transmitted. "Coherent transmission" means that multiple TRPs can jointly transmit a data stream, allowing the transmitted signals from multiple TRPs to superimpose in the same direction when reaching the terminal device. This significantly increases the power of the received signal and greatly reduces interference. In other words, coherent transmission can convert all interference between multiple TRPs into useful signals, avoiding mutual interference and significantly improving data transmission performance.

[0123] 3. Uplink and downlink channel reciprocity: Since electromagnetic wave propagation is reversible, in scenarios where uplink and downlink (referred to as uplink and downlink) operate on the same frequency band and from the same transceiver antenna, the uplink and downlink channels possess equivalence characteristics: path loss, delay, and phase are identical for both. Ideally, Where H DL Indicates the downlink channel response. This represents the uplink channel response. Utilizing uplink and downlink channel reciprocity, the base station can directly obtain the uplink channel through the reference signal transmitted by the UE, thereby performing downlink scheduling. In this embodiment, uplink and downlink channel reciprocity can be simply referred to as channel reciprocity, reciprocity, etc.

[0124] 3. Reciprocity correction:

[0125] In a communication system, the channel amplitude and phase experienced by a signal from its generation to its acquisition by the receiver are jointly determined by the "UE-side hardware + radio path response + base station-side hardware": the uplink signal generated by the UE will experience a multiplicative factor when transmitted from the UE side to the transmission medium (air). After the signal undergoes the uplink channel response, it will experience a multiplicative coefficient at the base station side. The downlink signal generated by the base station will undergo a multiplicative coefficient when it is transmitted to the transmission medium from the base station side. After experiencing the downlink channel response, a multiplicative factor will be applied on the UE side. As can be seen from the reciprocity principle, the uplink and downlink channel responses can be... It can be obtained by direct transformation, but if and Unlike other channels, the uplink and downlink channels will not be reciprocal, meaning there will be deviations in amplitude and phase between the uplink and downlink channels. This makes it impossible to directly obtain the downlink channel response from the uplink channel response. Similarly, and Differences can also lead to a lack of reciprocity in the channel. To ensure reciprocity between uplink and downlink channels, both the UE and the base station need to perform reciprocity corrections separately to guarantee... and Same and and same.

[0126] As shown in Figure 2, for uplink transmission, the uplink channel response needs to be multiplied by the UE-side transmission coefficient on the left, where t1…tK correspond to the transmission coefficients on each of the UE's transmitting antennas, and also needs to be multiplied by the base station-side reception coefficient on the right, where r1…rN correspond to the reception coefficients on each of the base station's receiving antennas. Similarly, for downlink transmission, the downlink channel response needs to be multiplied by the UE-side reception coefficient on the left, and also needs to be multiplied by the base station-side transmission coefficient on the right.

[0127] To ensure that uplink and downlink channel reciprocity holds. and The differences can be resolved through terminal-side reciprocity correction; and The difference is resolved through TRP self-calibration, that is, the base station needs to obtain its own... The value can be determined so that the base station can use it. The value of is used to adjust the amplitude and phase of the received channel signal to ensure reciprocity. This is understandable. It is used to represent the uplink multiplication coefficient corresponding to the nth antenna on the base station side. and downward multiplicative factor The parameters of the difference between them, for example

[0128] Considering a multi-site CJT scenario, multiple stations will jointly send the Physical Downlink Shared Channel (PDSCH) to the UE. Assuming that two TRPs cooperate, the channel traversed by the PDSCH can be represented as: H = [H1H2], where H1 corresponds to the channel dimension Tx1*Rx from TRP1 to the UE, H2 corresponds to the channel dimension Tx2*Rx from TRP2 to the UE, and the channel dimension of the equivalent channel H of the PDSCH sent by multiple stations is (Tx1+Tx2)*Rx.

[0129] Typically, the multiplicative coefficients mentioned above differ between different TRPs. The impact on reciprocity is as follows: Correction is performed within the TRP (TRP1 needs to acquire its own...). The value of TRP2 needs to be obtained. Based on the value of (), additional TRP inter-correction is required (requiring the acquisition of) the value of (). and The relative relationship of the phase difference of the downlink measurement channel between the H-TRP and the UE is shown in FIG. 3, thereby ensuring that reciprocity is also true for H.

[0130] In practical applications, the phase difference can be corrected by obtaining the phase calibration coefficient between the TRPs.

[0131] For example, referring to FIG. 4A, a flowchart of a method for obtaining the phase calibration coefficient is shown, including the following steps:

[0132] S401, the base station configures N TRP non-zero power (NZP) channel state information (CSI)-reference signal (RS) resources, the N TRP NZP CSI-RS resources correspond to the N TRP TRPs one by one, and N TRP is a positive integer greater than 1.

[0133] S402, each of the N TRP TRPs respectively transmits a downlink reference signal on the CSI-RS resource corresponding to itself, and correspondingly, the UE receives the downlink reference signal transmitted by the N TRP TRPs; the UE obtains the phase difference of the downlink measurement channel according to the received downlink reference signal, for example, referring to FIG. 4B, an interaction diagram between the i-th TRP (which can be represented as TRP i) in the N TRP -1 TRPs, a reference TRP (which can be represented as TRP nref), and a UE, the phase difference of the downlink measurement channel between the TRP i and the TRP nref can be represented as:

[0134] wherein, represents the actual downlink channel response corresponding to the i-th TRP received by the UE, i is an integer less than N TRP -1, nref is the identifier of the reference TRP, represents the downlink channel response corresponding to the reference TRP received by the UE, phase() represents a function of obtaining the phase difference; represents the amplitude of the downlink transmitting multiplicative coefficient corresponding to the i-th TRP. represents the phase information of the downlink transmitting multiplicative coefficient corresponding to the i-th TRP. i represents the channel response corresponding to the i-th TRP (|h i | represents the modulus of h i , that is, the amplitude value); represents the phase information of the channel response corresponding to the i-th TRP. denotes the amplitude of the downlink source-end multiplicative coefficient corresponding to the reference TRP; denotes the phase information of the downlink source-end multiplicative coefficient corresponding to the reference TRP;h nref denotes the channel response corresponding to the reference TRP; denotes the phase information of the channel response corresponding to the reference TRP; denotes the phase of the downlink source-end multiplicative coefficient of the ith TRP; denotes the phase of the downlink source-end multiplicative coefficient of the reference TRP; denotes the phase of the channel response of the ith TRP; denotes the phase of the channel response of the reference TRP.

[0135] It can be understood that N TRP TRPs include N TRP -1 and the reference TRP.

[0136] S403, the UE reports the phase difference of the downlink measurement channel between the TRP i and the TRP nref;

[0137] The phase difference of the downlink measurement channel between the TRP i and the TRP nref can be denoted as the aforementioned α i , and α i can be carried in uplink control information (UCI);

[0138] S404, the UE sends uplink reference signals to N TRP TRPs respectively using the same ports as those for receiving downlink reference signals, and correspondingly, N TRP TRPs receive the uplink reference signals; N TRP -1 TRPs interact with the reference TRP to measure the uplink channel information, and the phase difference of the uplink measurement channel can be obtained, for example, the phase difference of the uplink measurement channel between the ith TRP in the N TRP -1 TRPs and the reference TRP can be denoted as:

[0139] wherein, denotes the uplink channel response received by the ith TRP, i is an integer of 0 or less than N TRP -1, nref is the identifier of the reference TRP, denotes the uplink channel response received by the reference TRP, and phase() denotes a function of calculating the phase difference; A ULi denotes the amplitude of the uplink source-end multiplicative coefficient corresponding to the ith TRP; denotes the phase information of the uplink source-end multiplicative coefficient corresponding to the ith TRP;hi denotes the channel response corresponding to the i-th TRP; denotes the channel response phase information corresponding to the i-th TRP; denotes the amplitude of the uplink originating multiplicative coefficient corresponding to the reference TRP denotes the phase information of the uplink originating multiplicative coefficient corresponding to the reference TRP; h nref denotes the channel response corresponding to the reference TRP; denotes the channel response phase information corresponding to the reference TRP; denotes the uplink originating multiplicative coefficient phase of the i-th TRP; denotes the uplink originating multiplicative coefficient phase of the reference TRP; denotes the channel response phase of the i-th TRP; denotes the channel response phase of the reference TRP.

[0140] S405, the base station obtains the phase calibration coefficient of the TRP i relative to the TRP nref.

[0141] For example, the TRP i can be based on α i and β i obtain the phase calibration coefficient of the i-th TRP (TRP i) relative to the reference TRP (TRP nref):

[0142] For example, referring to FIG. 5, a flowchart of another method for obtaining a phase calibration coefficient includes the following steps:

[0143] S501, the base station configures N TRP sets of NZP CSI-RS resources, the N TRP sets of NZP CSI-RS resources correspond one-to-one to N TRP TRPs, N TRP is a positive integer greater than 1;

[0144] S502, the UE transmits a single-port SRS to the N TRP TRPs, and correspondingly, the N TRP TRPs receive the SRS;

[0145] S503, each TRP performs channel estimation based on the received SRS to obtain a corresponding channel estimation result;

[0146] For example, the i-th TRP performs channel estimation based on the received SRS to obtain a channel estimation result h i .

[0147] S504, each TRP precodes the CSI-RS with the channel estimation result and transmits a beamformed CSI-RS, and correspondingly, the UE receives N TRP beamformed CSI-RSs;

[0148] For example, the i-th TRP precodes the CSI-RS with the channel estimation result h i and transmits a beamformed CSI-RS-i, and correspondingly, the UE receives the beamformed CSI-RS-i.

[0149] It can be understood that the precoding can be maximum radio transmission (MRT) precoding, that is, the precoding is

[0150] S505, the UE selects the TRP corresponding to the CSI-RS with the maximum reference signal received power (RSRP) as the reference TRP, such as TRP i = TRP nref, and obtains the phase difference of the downlink measurement channel between each of the N TRP -1 TRPs and the reference TRP, such as the phase difference a i of the downlink measurement channel between the i-th TRP and the reference TRP. i );

[0151] S506, the UE reports the phase difference of the downlink measurement channel to the base station.

[0152] For example, the UE reports the phase difference of the downlink measurement channel to the N TRP -1 TRPs. For example, the phase difference of the downlink measurement channel includes the phase difference a i of the downlink measurement channel between the i-th TRP and the reference TRP, a i as the phase calibration coefficient of the i-th TRP relative to the reference TRP. Wherein, a i may be carried in uplink control information (UCI).

[0153] In the above two calibration schemes, the phase calibration coefficient reported by the UE is the phase difference between the TRPs. Wherein, the phase difference can also be referred to as the phase deviation, which is not limited in the embodiments of the present application.

[0154] Some technologies propose to report the phase calibration coefficient of a subband, such as the phase difference of a subband. Wherein, the description of the phase difference of the subband is, for example: Φ0 is the phase difference of subband 0, and the phase difference of subband σ can be calculated as Φ σΦ n,σ = Φ n,0 + σΓ n , Γ n is the phase difference between subband 0 and band σ, n is the identity of the TRP, n = 0, 1, 2, … N SB-P , N SB-P is the number of subbands, n ≠ nref, nref is the identity of the reference subband. It can be seen that the phase difference of the subband reported by the terminal device is the phase difference between the subbands.

[0155] Some technologies also propose joint calibration of multiple SRS ports, such as reporting by the terminal device of the phase difference of the subband corresponding to each SRS port in the multiple SRS ports of the terminal device.

[0156] In these scenarios, if the reporting mechanism shown in FIG. 4A or FIG. 6 is followed, the bit overhead of the phase calibration coefficient of the subband in the UCI is: the number of subbands × the number of TRPs for CJT × the number of quantization bits of the phase calibration coefficient × the number of SRS ports. Taking the number of subbands as 4, the number of TRPs as 3, the number of phase quantization bits as 5, and the number of SRS ports as 4 as examples, the overhead of the reporting in the UCI is about 4*3*5*4 = 240 bits.

[0157] There is a certain probability of packet loss in the UCI, for example, in the scenario of data transmission with higher priority than the UCI, there is a case of UCI packet loss. To reduce the information loss caused by the phase difference between the TRPs carried in the UCI due to the UCI packet loss, as shown in FIG. 6, an embodiment of the present application provides a communication method, which mainly includes the following steps.

[0158] S601, the terminal device determines the phase difference information between the i-th TRP and the reference TRP in the I transmission reception points TRPs according to the downlink reference signal.

[0159] Exemplarily, the terminal device can measure the downlink reference signal from the reference TRP to determine the phase difference of the downlink measurement channel corresponding to the reference TRP; the terminal device can measure the downlink reference signal from the i-th TRP to determine the phase difference of the downlink measurement channel corresponding to the i-th TRP; the phase difference information between the i-th TRP and the reference TRP can indicate the phase difference of the downlink measurement channel between the i-th TRP and the reference TRP. Wherein, I is a positive integer, i is a positive integer from 1 to I.

[0160] According to the wideband level / subband level division, the phase difference information between the i th TRP and the reference TRP can be divided into wideband phase difference information between the i th TRP and the reference TRP and subband phase difference information between the i th TRP and the reference TRP. Illustratively, the wideband phase difference information between the i th TRP and the reference TRP indicates the phase difference of the downlink measurement channel at the wideband level between the i th TRP and the reference TRP, and the subband phase difference information between the i th TRP and the reference TRP indicates the phase difference of the downlink measurement channel at the subband level between the i th TRP and the reference TRP.

[0161] According to the reference signal port (such as the SRS port) division, taking P reference signal ports as an example, the phase difference information between the i th TRP and the reference TRP can include the phase difference information between the i th TRP and the reference TRP corresponding to each of the P reference signal ports, or alternatively described as: the number of phase difference information between the i th TRP and the reference TRP is P, and the P phase difference information corresponds to the P reference signal ports one by one. Wherein, P is an integer greater than 1.

[0162] In addition, the above division methods can also be combined together for implementation, for example, the wideband phase difference information between the i th TRP and the reference TRP includes: the wideband phase difference information between the i th TRP and the reference TRP corresponding to each of the P reference signal ports; the subband phase difference information between the i th TRP and the reference TRP includes: the subband phase difference information between the i th TRP and the reference TRP corresponding to each of the P reference signal ports. The phase difference information between the i th TRP and the reference TRP corresponding to each of the P reference signal ports can include wideband phase information and / or subband phase information.

[0163] S602, the terminal device sends first information to the network device.

[0164] Wherein, the first information includes a plurality of fields, and the plurality of fields are used to indicate the phase difference information between the i th TRP and the reference TRP in the I TRPs. Optionally, the first information can be UCI. For example, I is 2, i takes values including 1 and 2, and the plurality of fields are used to indicate the phase difference information between the first TRP and the reference TRP and the phase difference information between the second TRP and the reference TRP. The same field can indicate part of the phase difference information between the first TRP and the reference TRP and part of the phase difference information between the second TRP and the reference TRP.

[0165] It can be understood that the transmission priorities of different fields in the plurality of fields are different, that is, the transmission priorities of the part of the phase difference information in the phase difference information between the TRPs are different.

[0166] Optionally, the network device can be the aforementioned reference TRP, other TRP, base station, or the like, and embodiments of the present application do not limit this.

[0167] S603, the network device determines the phase difference information between the i-th TRP and the reference TRP according to the first information.

[0168] It can be understood that the network device and the terminal device have the same understanding of the field structure in the first information, and the network device can parse the first information according to the field structure of the first information described in S602, and then obtain the phase difference information between the i-th TRP and the reference TRP.

[0169] In the above method, the phase difference information is divided by multiple fields in the UCI, and the transmission priority of different parts of the phase difference information is configured based on the transmission priority of different fields, so that when UCI packet loss occurs, the part of the phase difference information with low transmission priority is lost first. Such design can reduce the information loss caused by UCI packet loss in the phase difference between TRPs.

[0170] For ease of implementation, the content of the phase difference information and the field structure in the corresponding first information will be described in detail below taking the phase difference information between the i-th TRP and the reference TRP as an example.

[0171] (I) Divide the transmission priority of the phase difference information at the wideband level / subband level

[0172] The phase difference information between the i-th TRP and the reference TRP includes: wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP.

[0173] Design 1: The phase difference information between the i-th TRP and the reference TRP includes: wideband phase difference information between the i-th TRP and the reference TRP, and subband phase difference information between the i-th TRP and the reference TRP.

[0174] Wherein, the broadband phase difference information between the i-th TRP and the reference TRP includes the phase difference of the broadband downlink measurement channel between the i-th TRP and the reference TRP; or, the broadband phase difference information between the i-th TRP and the reference TRP includes the subband phase difference information between the i-th TRP and the reference TRP in the 1st subband of the N subbands; or, the broadband phase difference information between the i-th TRP and the reference TRP includes the subband phase difference information between the i-th TRP and the reference TRP in the middle subband of the N subbands. Wherein, the N subbands are used for the subband-level downlink measurement channel, and the middle subband of the N subbands can be represented as the i-th... A person with a belt The rounding sign is used for rounding up. The sub-band phase difference information between the i-th TRP and the reference TRP includes the sub-band phase difference information of the i-th TRP and the reference TRP in each of the N sub-bands.

[0175] Optionally, the transmission priority of the broadband phase difference information between the i-th TRP and the reference TRP is greater than the transmission priority of the sub-band phase difference information between the i-th TRP and the reference TRP.

[0176] Optionally, taking P reference signal ports used for calibration measurements as an example, the broadband phase difference information between the i-th TRP and the reference TRP in the first broadband of N broadband includes: the broadband phase difference information between the i-th TRP and the reference TRP corresponding to each of the P reference signal ports. Based on this, it can be understood that for each of the I TRPs, the broadband phase difference information corresponding to the TRP includes P broadband phase difference information. The subband phase difference information between the i-th TRP and the reference TRP in the first subband of N subbands includes: the subband phase difference information between the i-th TRP and the reference TRP corresponding to each of the P reference signal ports in the first subband of N subbands. Based on this, it can be understood that for each of the I TRPs, the subband phase difference information corresponding to the TRP includes P×N subband phase difference information.

[0177] Based on the above design 1, the first information includes a first field, and the first field is used to carry first indication information, and the first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field. For example, the first indication information occupies 1 bit, and the value is 1 or 0. When the first indication information is 0, it indicates that the first information further includes the second field, or it can also be understood that: when the first indication information is 0, the first information includes the first field and the second field. When the first indication information is 1, it indicates that the first information further includes the second field and the third field, or it can also be understood that: when the first indication information is 1, the first information includes the first field, the second field and the third field. Wherein, the transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field.

[0178] The second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP. Wherein, i takes an integer from 1 to I, that is, the second field is used to carry the wideband phase difference information corresponding to the I TRPs respectively. The wideband phase difference information is denoted as WB In this implementation, the second field carries WB The number of which is the number of TRPs I. Further optionally, taking P reference signal ports as an example, the wideband phase difference information corresponding to each TRP includes the wideband phase difference information corresponding to each reference signal port in the P reference signal ports, or it can be understood that: the wideband phase difference information corresponding to each TRP includes P wideband phase difference information, and the P wideband phase difference information corresponds to the P reference signal ports one by one. In this implementation, the second field carries WB The number of which is I×P.

[0179] The third field is used to carry the sub-band phase difference information between the i-th TRP and the reference TRP. Wherein, i takes an integer from 1 to I, that is, the third field is used to carry the sub-band phase difference information corresponding to the I TRPs respectively. Taking the number of sub-bands as N, the third field is used to carry the sub-band phase difference information of each sub-band in N sub-bands between the i-th TRP and the reference TRP. The sub-band phase difference information corresponding to N sub-bands can be expressed as N SB =N-1. In this implementation, the third field carries the sub-band phase difference information SBThe number of the subband phase difference information corresponding to each TRP is I×N. Further optionally, taking P reference signal ports as an example, the subband phase difference information corresponding to each TRP includes the subband phase difference information corresponding to each of the P reference signal ports, or it is understood that: the subband phase difference information corresponding to each TRP includes P subband phase difference information, and the P subband phase difference information corresponds to the P reference signal ports one by one. In this implementation, the subband phase difference information Φ SB The number of the subband phase difference information corresponding to each TRP is I×P×N.

[0180] Optionally, based on the contents carried by the second field and the third field, the first indication information carried by the first field can also be understood as: the first indication information is used to indicate the wideband phase difference information, or the first indication information is used to indicate the wideband phase difference information and the subband phase difference information. Optionally, the first field can also carry second indication information, and the second indication information is used to indicate the P reference signal ports, for example, the second indication information indicates the number P of the reference signal ports, or the second indication information indicates the P reference signal ports used for calibration measurement in all reference signal ports. Wherein, the reference signal can be SRS, and the P reference signal ports can be alternatively described as: P SRS ports. SRS

[0181] Exemplarily, taking the first information as 2part UCI as an example, as shown in Table 1 below, the UCI includes a first part (part1) and a second part (part2), and the transmission priority of part1 is higher than that of part2. Accordingly, the first field is included in part1, and the second field and the third field which can exist are included in part2.

[0182] Table 1

[0183] Wherein, the first field included in the first part in Table 1 includes “1bit indicator for WB / SB”, and “1bit indicator for WB / SB” is an example of the first indication information. When the value of “1bit indicator for WB / SB” is 0, it indicates that the second part of the 2part UCI only includes the wideband phase difference information; or when the value of “1bit indicator for WB / SB” is 1, it indicates that the second part of the 2part UCI only includes the wideband phase difference information and the subband phase difference information. As an example, the wideband phase difference information Φ WB corresponds to all TRPs and P SRS SRS ports, and all TRPs refer to all TRPs participating in the CJT except the reference TRP, for example, the aforementioned I TRPs, and the wideband phase difference information Φ​WB The number of sub-band phase difference information contained in the second part is N x I x P SRS ; the sub-band phase difference information is shown in Table 1 Corresponding to all TRPs and P SRS SRS ports, all TRPs refer to all TRPs participating in CJT except the reference TRP, for example, the aforementioned I TRPs, N sub-bands, the number of sub-band phase difference information contained in the second part is N x I x P SRS .

[0184] Optionally, the first field contained in the first part can further include second indication information, which can be "P SRS " and / or "Bitmap of P SRS " in Table 1, wherein "Bitmap of P SRS " can be understood as indicating P SRS SRS ports for calibration measurement in all reference signal ports by using a Bitmap. For example, each bit in the Bitmap corresponds to an SRS port, and when the bit value is 1, it indicates that the corresponding SRS port is used for calibration measurement; when the bit value is 0, it indicates that the corresponding SRS port is not used for calibration measurement.

[0185] Exemplarily, taking the first information as 1 part UCI for example, as shown in Table 2, the UCI includes the aforementioned first field (marked as Group 0), the second field (marked as Group 1), and the third field (marked as Group 2). In terms of transmission priority, Group 0 > Group 1 > Group 2.

[0186] Table 2

[0187] Wherein, the definition of the parameters in Table 2 can be understood with reference to the description in Table 1, and the embodiments of the present application will not be described here.

[0188] In the design 2, the phase difference information between the ith TRP and the reference TRP includes wideband phase difference information between the ith TRP and the reference TRP, and subband phase difference information between the ith TRP and the reference TRP. The wideband phase difference information between the ith TRP and the reference TRP includes the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands. The subband phase difference information between the ith TRP and the reference TRP includes a difference between the subband phase difference information between the ith TRP and the reference TRP on the nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands. The N is an integer greater than 1, and the n is an integer from 1 to N. Optionally, the transmission priority of the wideband phase difference information between the ith TRP and the reference TRP is higher than the transmission priority of the subband phase difference information between the ith TRP and the reference TRP.

[0189] Optionally, taking P reference signal ports used for calibration measurement as an example, the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands includes the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands corresponding to each reference signal port of the P reference signal ports. Based on this, it can be understood that the first subband phase difference information is used to represent the subband phase difference information on the first subband of the N subbands. For each TRP of the I TRPs, the wideband phase difference information corresponding to each TRP includes P first subband phase difference information.

[0190] Based on the above design 2, the first information includes a first field, and the first field is used to carry first indication information. The first indication information indicates that the first information further includes a second field, or the first indication information indicates that the first information further includes the second field and a third field. For example, the first indication information occupies 1 bit, and the value is 1 or 0. When the first indication information is 0, it indicates that the first information further includes the second field, or it can also be understood that when the first indication information is 0, the first information includes the first field and the second field. When the first indication information is 1, it indicates that the first information further includes the second field and the third field, or it can also be understood that when the first indication information is 1, the first information includes the first field, the second field and the third field. The transmission priority of the first field is higher than the transmission priority of the second field, and the transmission priority of the second field is higher than the transmission priority of the third field.

[0191] The second field is used to carry the wideband phase difference information between the ith TRP and the reference TRP. Wherein, i takes an integer from 1 to I, that is, the second field is used to carry the wideband phase difference information corresponding to the I TRPs respectively. The wideband phase difference information is denoted as Φ WB In this implementation, the second field carries Φ WB The number of Φ WB corresponds to the subband phase difference information Φ0 on the first subband in the N subbands. Further optionally, taking the P reference signal ports as an example, the wideband phase difference information corresponding to each TRP includes the wideband phase difference information corresponding to each reference signal port in the P reference signal ports, or it is understood that: the wideband phase difference information corresponding to each TRP includes P wideband phase difference information, and the P wideband phase difference information corresponds to the P reference signal ports one by one. In this implementation, the second field carries Φ WB The number of Φ

[0192] The third field is used to carry the subband phase difference information between the ith TRP and the reference TRP, which includes the difference between the aforementioned subband phase difference information, denoted as ΔΦ. For each of the I TRPs, the number of ΔΦ is the number of subbands N. In this implementation, the third field carries ΔΦ, and the number of ΔΦ is I×N. Further optionally, taking the P reference signal ports as an example, the subband phase difference information corresponding to each TRP includes the subband phase difference information corresponding to each reference signal port in the P reference signal ports, or it is understood that: the subband phase difference information corresponding to each TRP includes P subband phase difference information, and the P subband phase information corresponds to the P reference signal ports one by one. In this implementation, the third field carries ΔΦ, and the number of ΔΦ is P×I×N.

[0193] Optionally, based on the contents carried by the second field and the third field, the first indication information carried by the first field can also be understood as: the first indication information is used to indicate the wideband phase difference information, or the first indication information is used to indicate the wideband phase difference information and the subband phase difference information. Optionally, the first field can also carry second indication information, and the second indication information is used to indicate the P reference signal ports, for example, the second indication information indicates the number P of reference signal ports, or the second indication information indicates the P reference signal ports used for calibration measurement in all reference signal ports. Wherein, the reference signal can be SRS, and the P reference signal ports can be described as P SRS SRS ports.

[0194] Exemplarily, taking the first information as 1 part UCI as an example, as shown in Table 3, the UCI includes the aforementioned first field (denoted as Group 0), the second field (denoted as Group 1), and the third field (denoted as Group 2). In terms of transmission priority, Group 0 > Group 1 > Group 2.

[0195] Table 3

[0196] The definitions of the parameters in Table 3 can be understood with reference to the description in Table 1 and the description in Design 2, which will not be repeated here.

[0197] Optionally, Design 2 can also be understood as: the phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP. The aforementioned second field is used to carry the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands; and the third field is used to carry the difference between the subband phase difference information between the ith TRP and the reference TRP on the nth subband of the N subbands and the subband phase difference information between the ith TRP and the reference TRP on the first subband of the N subbands. The specific design content and definition can be understood with reference to the foregoing description, which will not be repeated here.

[0198] Design 3: the phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP. The subband phase difference information between the ith TRP and the reference TRP includes subband phase difference information between the ith TRP and the reference TRP on each of the N subbands. Optionally, in terms of the division of transmission priority, it can be set that the subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands is greater than the subband phase difference information between the ith TRP and the reference TRP on N-M subbands of the N subbands; wherein the N-M subbands include subbands other than the M subbands in the N subbands, and the M is a positive integer less than the N. In this implementation, it can be understood that the subband phase difference information corresponding to each TRP of the T TRPs includes N subband phase difference information, and the N subband phase information corresponds to the N subbands one by one.

[0199] Optionally, the subband phase difference information between the ith TRP and the reference TRP further comprises: subband phase difference information between the ith TRP and the reference TRP corresponding to each of the P reference signal ports. Based on this, it can be understood that for each of the I TRPs, each TRP corresponds to P x N subband phase difference information. Similarly, the subband phase difference information between the ith TRP and the reference TRP on M subbands of the N subbands comprises: subband phase difference information between the ith TRP and the reference TRP on the M subbands corresponding to each of the P reference signal ports. Based on this, it can be understood that for each of the I TRPs, each TRP corresponds to P x M subband phase difference information. Similarly, the subband phase difference information between the ith TRP and the reference TRP on M subbands of the M-N subbands comprises: subband phase difference information between the ith TRP and the reference TRP on N-M subbands corresponding to each of the P reference signal ports. Based on this, it can be understood that for each of the I TRPs, each TRP corresponds to P x (N-M) subband phase difference information.

[0200] Based on the design 3, the first information can comprise a fourth field and a fifth field, the transmission priority of the fourth field is greater than the transmission priority of the fifth field, the fourth field is used to carry the subband phase difference information between the ith TRP and the reference TRP on the M subbands of the N subbands, and the fifth field is used to carry the subband phase difference information between the ith TRP and the reference TRP on the N-M subbands of the N subbands.

[0201] Optionally, the first information can further comprise a sixth field, the transmission priority of the sixth field is greater than the transmission priority of the fourth field. The sixth field is used to carry second indication information, and the second indication information is used to indicate the P reference signal ports, for example, the second indication information indicates the number P of reference signal ports, or the second indication information indicates the P reference signal ports used for calibration measurement in all reference signal ports. Wherein, the reference signal can be SRS, and the P reference signal ports can be alternatively described as P SRS ports. SRS

[0202] Optionally, as shown in FIG. 7, the subband phase difference information between the TRPs on each subband of the N subbands can be regarded as a first-order function on the frequency, for example, the phase difference on the subcarrier k is Δψ(k) = j x 2π x k x Δfτ + j x φ TRX , the slope corresponding to the first-order function is 2πτ, and the intercept is φ TRX ​Based on this, the subband phase difference information between TRPs in the middle subband of N subbands can be understood as the average value of the broadband phase difference information of the broadband composed of N subbands. That is, the subband phase difference information between TRPs in the middle subband of N subbands can also be regarded as broadband phase difference information. Therefore, in the transmission priority division, the subband phase difference information between TRPs in the middle subband of N subbands is greater than the subband phase difference information between TRPs in the middle subband of N subbands. Based on this, the M subbands in the N subbands described in Design 3 can be 1 subband, and this 1 subband is the middle subband of the N subbands, such as the Mth subband in the N subbands. A person with a belt This is the floor symbol.

[0203] For example, taking a 1-part UCI as the first piece of information, as illustrated in Table 4 below, this UCI includes the aforementioned fourth field (denoted as Group 0), fifth field (denoted as Group 1), and sixth field (denoted as Group 3). In terms of transmission priority, Group 0 > Group 1; optionally, Group 3 > Group 0.

[0204] Table 4

[0205] in, Indicates the first of N sub-bands The sub-band phase difference information of each sub-band. Other parameters in Table 4 can be understood by referring to the description in Table 1 and Design 3, and will not be repeated in this embodiment.

[0206] Furthermore, some examples of M subbands out of N subbands may include the following situations: for example, the M subbands include: the first subband out of the N subbands; or, the first subband and the Nth subband out of the N subbands; or, the first subband and the Nth subband out of the N subbands. The first sub-band; or, the first of the N sub-bands. The first sub-band and the Nth sub-band.

[0207] For example, based on Table 4, the following Tables 5 to 7 can be derived. The parameters in Tables 5 to 7 can be understood with reference to the description in Table 4 and the description in Design 3. This application embodiment will not elaborate on these parameters.

[0208] Table 5

[0209] Table 6

[0210] Table 7

[0211] In a possible implementation, the fifth field can be further divided into a first subfield and a second subfield, and the transmission priority of the first subfield is greater than or less than the transmission priority of the second subfield. The first subfield is used to carry the subband phase difference information between the ith TRP and the reference TRP on the xth subband of the N-M subbands, and the first subfield is used to carry the subband phase difference information between the ith TRP and the reference TRP on the yth subband of the N-M subbands. The x is an odd number less than or equal to the N-M, and the y is an even number less than or equal to the N-M. It can be understood that in the case of subband phase difference information of N subbands labeled starting from 0, that is, represented as the above , the xth subband is equivalent to the subband numbered as an even number, such as Φ0, Φ2, Φ4, and the like, and the yth subband is equivalent to the subband numbered as an odd number, such as Φ1, Φ3, Φ5, and the like.

[0212] As an example, it is assumed that the value of N is an odd number, N SB , and the value of N-1 is an even number. Table 8 further illustrates the division based on Table 5 as follows: , and The transmission priority of is greater than the transmission priority of .

[0213]

[0214] (II) Priority of phase difference information transmission divided by reference signal port

[0215] The phase difference information between the ith TRP and the reference TRP includes the phase difference information between the ith TRP and the reference TRP corresponding to the pth reference signal port of P reference signal ports. The P is an integer greater than 1, and the p is an integer from 1 to the P. Based on this, it can be understood that the phase difference information corresponding to each TRP of the I TRPs includes P phase difference information, and the P phase difference information corresponds to the P reference signal ports one by one. Optionally, the reference signal can be SRS, and the P reference signal ports can be replaced by P SRS SRS ports.

[0216] Optionally, in the division of the transmission priority, different priorities can be used between the P phase difference information. Taking the reference signal as SRS as an example, the terminal device can determine the transmission priority between the P SRS SRS ports according to the measurement of the downlink reference signal (such as CSI-RS).

[0217] ​Based on this, one possible implementation of the first information is that the first information includes P fields, and the pth field of the P fields is used to carry phase difference information between the ith TRP corresponding to the pth reference signal port and the reference TRP. i is an integer from 1 to I, that is, the pth field is used to carry phase difference information corresponding to I TRPs respectively. Wherein, the transmission priority of the pth field of the P fields is higher than the transmission priority of the pth+1 field.

[0218] Design 4: For any one of the P phase difference information, the phase difference information can include wideband phase difference information and / or subband phase difference information, wherein the transmission priority of the wideband phase difference information is higher than the transmission priority of the subband phase difference information. Based on this, the pth field is specifically used to carry wideband phase difference information between the ith TRP corresponding to the pth reference signal port and the reference TRP, and / or subband phase difference information between the ith TRP corresponding to the pth reference signal port and the reference TRP. Wherein, the wideband phase difference information is denoted as Φ WB , and the pth field carries Φ WB The number of TRPs is I; the subband phase difference information is denoted as Φ SB , and the pth field carries Φ SB The number of TRPs is I. It can be understood that, for example, in N subbands, Φ SB includes subband phase difference information corresponding to each of the N subbands, that is, Φ SB includes N SB =N-1.

[0219] Optionally, the first information includes a seventh field, the transmission priority of the seventh field is higher than that of the P fields, and the seventh field is used to carry at least one of the following: second indication information indicating the P reference signal ports; third indication information indicating that the phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; fourth indication information indicating the correspondence between the P reference signal ports and the P fields.

[0220] Wherein, the second indication information can be understood with reference to the foregoing description, and the embodiments of the present application will not be described here. The third indication information can be understood with reference to the first indication information described in the foregoing, for example, the third indication information is 1 bit, and when the value is 0, it means that the phase difference information carried by the pth field only includes wideband phase difference information; when the value is 1, it means that the phase difference information carried by the pth field includes wideband phase difference information and subband phase difference information.

[0221] The fourth indication information can be understood according to one or more of the following examples. Example 1: The fourth indication information indicates that the numbers of the P reference signal ports are sorted in ascending order, and the pth field in the P fields corresponds to the pth reference signal port in the P reference signals. Example 2: The fourth indication information indicates the port number of the reference signal port corresponding to the pth field in the P fields. The fourth indication information corresponds to a bitmap, the length of the bitmap is greater than P, for example, the length of the bitmap is L, and the values of the P bits in the bitmap are 1, indicating that the corresponding P reference signal ports; the values of the L-P bits in the bitmap are 0.

[0222] Optionally, the first information includes a first part and a second part, the transmission priority of the first part is higher than the transmission priority of the second part; wherein the seventh field is included in the first part, and the P fields are included in the second part.

[0223] Exemplarily, taking the first information as 2part UCI and the P reference signal ports including SRS port 1 and SRS port 2 as an example, as shown in Table 9, the UCI includes a first part (part1) and a second part (part2), and the transmission priority of part1 is higher than that of part2. Correspondingly, the seventh field is included in part1, and the P fields are included in part2.

[0224] Table 9

[0225] In Table 9, the seventh field included in the first part includes one or more of the following: 1bit indicator for WB / SB; P SRS ; Bitmap of P SRS ; Group order of P SRS . Among them, "1bit indicator for WB / SB" is an example of the third indication information, when the value of "1bit indicator for WB / SB" is 0, it indicates that the phase difference information carried by the pth field of the second part of the 2part UCI includes wideband phase difference information; or when the value of "1bit indicator for WB / SB" is 1, it indicates that the phase difference information carried by the pth field of the second part of the 2part UCI includes wideband phase difference information and subband phase difference information. In Table 9, the second indication information can be "P SRS " and / or "Bitmap of P SRS ", wherein "Bitmap of P SRSIt can be understood that a Bitmap is used to indicate P SRS SRS ports for calibration measurement in all reference signal ports. For example, each bit in the Bitmap corresponds to an SRS port, and when the bit value is 1, it indicates that the corresponding SRS port is used for calibration measurement; and when the bit value is 0, it indicates that the corresponding SRS port is not used for calibration measurement. SRS As an example of the fourth indication information described above, for example, the Group order of P SRS includes the port numbers of P SRS SRS ports.

[0226] The field corresponding to the second part SRS port 1 and the field corresponding to SRS port 2. In a possible implementation, if the "1bit indicator for WB / SB" is 0, the field corresponding to SRS port 1 only includes Φ WB , and the field corresponding to SRS port 2 also only includes Φ WB . Taking all TRPs as the aforementioned I TRPs as an example, the number of Φ WB is I. In another possible implementation, if the "1bit indicator for WB / SB" is 1, the field corresponding to SRS port 1 includes Φ WB and Φ SB , and the field corresponding to SRS port 2 also includes Φ WB and Φ SB . Taking all TRPs as the aforementioned I TRPs as an example, the number of Φ WB is I, and the number of Φ SB is I.

[0227] Exemplarily, taking the first information as 1part UCI and P reference signal ports including SRS port 1 and SRS port 2 as an example, the UCI includes the aforementioned seventh field (corresponding to Group 0), the first field (corresponding to Group 1 and Group 2) of P fields, and the second field (corresponding to Group 3 and Group 4) of P fields. In terms of transmission priority, Group 0 > Group 1 > Group 2 > Group 3 > Group 4.

[0228] Table 10

[0229] Design 5: For any one of the P pieces of phase difference information, the phase difference information can be a sub-band phase difference information. Different priorities can be used between the P pieces of sub-band phase difference information in the division of transmission priorities. The first information includes a Pthfield in the P fields, and the Pthfield is specifically used to carry the sub-band phase difference information between the ithTRP corresponding to the Pthreference signal port and the reference TRP. The sub-band phase difference information is denoted as Φ SB , the Pthfield carries Φ SB The number of TRPs is I. It can be understood that, taking N sub-bands as an example, Φ SB includes the sub-band phase difference information corresponding to each of the N sub-bands, that is, Φ SB includes

[0230] N SB = N-1.

[0231] In design 5, the first information further includes a seventh field, the transmission priority of the seventh field is higher than that of the P fields, and the seventh field is used to carry at least one of the following: second indication information indicating the P reference signal ports; third indication information, fourth indication information indicating the correspondence between the P reference signal ports and the P fields. The second indication information and the fourth indication information can be understood with reference to the description in design 4, and the embodiments of the present application will not be described here.

[0232] Optionally, the first information includes a first part and a second part, the transmission priority of the first part is higher than that of the second part; wherein the seventh field is included in the first part, and the P fields are included in the second part.

[0233] Exemplarily, taking the first information as 2part UCI and the P reference signal ports including SRS port 1 to SRS port 4 as an example, as shown in Table 11, the UCI includes a first part (part1) and a second part (part2), and the transmission priority of part1 is higher than that of part2. Correspondingly, the seventh field is included in part1, and the P fields are included in part2.

[0234] Table 11

[0235] Wherein, the parameters in Table 11 can be understood with reference to the description in Table 9, and the embodiments of the present application will not be described here.

[0236] Exemplarily, taking the first information as 1 part UCI, P reference signal ports including SRS port 1 to SRS port 4 as an example, the UCI includes the aforementioned seventh field (corresponding to Group 0), the first field in the P fields (corresponding to Group 1), the second field in the P fields (corresponding to Group 2), the third field in the P fields (corresponding to Group 3), and the fourth field in the P fields (corresponding to Group 4), as shown in Table 12. In terms of transmission priority, Group 0 > Group 1 > Group 2 > Group 3 > Group 4.

[0237] Table 12

[0238] Based on the same idea, referring to FIG. 8, the embodiment of the present application provides a communication apparatus 800, which comprises a processing module 801 and a communication module 802. The communication apparatus 800 can be a terminal device, or can be applied to a terminal device or be used in matching with a terminal device, and can realize the communication method executed by the terminal device; or the communication apparatus 800 can be a network device, or can be applied to a network device or be used in matching with a network device, and can realize the communication method executed by the network device.

[0239] The communication module can also be referred to as a transceiver module, a transceiver, a transceiver, or a transceiver device. The processing module can also be referred to as a processor, a processing board, a processing unit, or a processing device. Optionally, the communication module is used to execute the sending operation and the receiving operation of the terminal device side or the network device side in the above method, and the device in the communication module used to realize the receiving function can be regarded as a receiving unit, and the device in the communication module used to realize the sending function can be regarded as a sending unit, that is, the communication module comprises a receiving unit and a sending unit.

[0240] When the communication apparatus 800 is applied to a terminal device, the processing module 801 can be used to realize the processing function of the terminal device in the embodiment shown in FIG. 6, and the communication module 802 can be used to realize the transceiver function of the terminal device in the embodiment shown in FIG. 6. Alternatively, the communication apparatus can also be understood with reference to the third aspect in the summary and the possible designs in the third aspect.

[0241] When the communication apparatus 800 is applied to a network device, the processing module 801 can be used to realize the processing function of the network device in the embodiment shown in FIG. 6, and the communication module 802 can be used to realize the transceiver function of the network device in the embodiment shown in FIG. 6. Alternatively, the communication apparatus can also be understood with reference to the fourth aspect in the summary and the possible designs in the fourth aspect.

[0242] It should be noted that the aforementioned communication module and / or processing module can be implemented by a virtual module, for example, the processing module can be implemented by a software function unit or a virtual device, and the communication module can be implemented by a software function or a virtual device. Alternatively, the processing module or the communication module can also be implemented by an entity device, for example, if the communication device is implemented by a chip / chip circuit, the communication module can be an input / output circuit and / or a communication interface, which performs an input operation (corresponding to the aforementioned receiving operation) and an output operation (corresponding to the aforementioned sending operation); and the processing module is an integrated processor or a microprocessor or an integrated circuit.

[0243] The division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, another division manner can be used. In addition, each function module in each embodiment of the present application can be integrated in one processor, or can be a separate physical entity, or two or more modules can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software function module.

[0244] Based on the same technical concept, the embodiments of the present application also provide a communication device 900. For example, the communication device 900 can be a chip or a chip system. Optionally, in the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0245] The communication device 900 can be used to implement the functions of any network element in the communication system described in the foregoing embodiments. The communication device 900 can include at least one processor 910 coupled with a memory. Optionally, the memory can be located in the communication device, and can be integrated with the processor, or can be located outside the communication device. For example, the communication device 900 can further include at least one memory 920. The memory 920 stores necessary computer programs, computer programs or instructions and / or data for implementing any of the foregoing embodiments. The processor 910 can execute the computer programs stored in the memory 920 to complete the method in any of the foregoing embodiments.

[0246] The communication device 900 can further include a communication interface 930, and the communication device 900 can exchange information with other devices through the communication interface 930. For example, the communication interface 930 can be a transceiver, a circuit, a bus, a module, a pin or other types of communication interfaces. When the communication device 900 is a chip-type device or a circuit, the communication interface 930 in the communication device 900 can also be an input / output circuit, which can input information (or receive information) and output information (or send information). The processor is an integrated processor or a microprocessor or an integrated circuit or a logic circuit, and the processor can determine the output information according to the input information.

[0247] The coupling in the embodiments of the present application is indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, for information interaction between devices, units or modules. The processor 910 can operate in cooperation with the memory 920 and the communication interface 930. The specific connection medium between the processor 910, the memory 920 and the communication interface 930 is not limited in the embodiments of the present application.

[0248] Optionally, referring to FIG. 9, the processor 910, the memory 920 and the communication interface 930 are connected with each other through a bus 940. The bus 940 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or only one type of bus.

[0249] In the embodiments of the present application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0250] In the embodiments of the present application, the memory can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and can also be a volatile memory, such as a random-access memory (RAM). The memory can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. The memory in the embodiments of the present application can also be a circuit or other any device capable of realizing a storage function, used for storing program instructions and / or data.

[0251] In a possible implementation, the communication apparatus 900 can be applied to a terminal device, and specifically, the communication apparatus 900 can be a terminal device or an apparatus capable of supporting a terminal device and implementing the functions of the terminal device in any of the above-described embodiments. The memory 920 stores computer programs (or instructions) and / or data for implementing the functions of the terminal device in any of the above-described embodiments. The processor 910 can execute the computer programs stored in the memory 920 to complete the method performed by the terminal device in any of the above-described embodiments. When applied to a terminal device, the communication interface in the communication apparatus 900 can be used to interact with a network device, send information to the network device, or receive information from the network device.

[0252] In another possible implementation, the communication apparatus 900 can be applied to a network device, and specifically, the communication apparatus 900 can be a network device or an apparatus capable of supporting a network device and implementing the functions of the network device in any of the above-described embodiments. The memory 920 stores computer programs (or instructions) and / or data for implementing the functions of the network device in any of the above-described embodiments. The processor 910 can execute the computer programs stored in the memory 920 to complete the method performed by the network device in any of the above-described embodiments. When applied to a network device, the communication interface in the communication apparatus 900 can be used to interact with a terminal device, send information to the terminal device, or receive information from the terminal device.

[0253] Since the communication apparatus 900 provided in this embodiment can be applied to a terminal device to complete the method performed by the terminal device, or applied to a network device to complete the method performed by the network device, the technical effects that can be achieved thereby can refer to the above method examples, which will not be described herein again.

[0254] Based on the above embodiments, the embodiments of the present application provide a communication system including a terminal device and a network device, wherein the terminal device and the network device can implement the method provided in the embodiment shown in FIG. 6.

[0255] The technical solutions provided by the embodiments of the present application can be realized by software, hardware, firmware or any combination thereof, in whole or in part. When realized by software, the technical solutions can be realized in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as digital video disc (DVD)), semiconductor media, etc.

[0256] In the embodiments of the present application, under the premise of no logical contradiction, the embodiments can be referred to each other, for example, the methods and / or terms between the method embodiments can be referred to each other, for example, the functions and / or terms between the device embodiments can be referred to each other, for example, the functions and / or terms between the device embodiments and the method embodiments can be referred to each other.

[0257] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application belong to the scope of the claims of the embodiments of the present application and their equivalent technologies, the embodiments of the present application also intend to include these modifications and variations.

Claims

1. A communication method characterized by comprising: The application is applied to a terminal device, comprising: determining phase difference information between an i-th transmission reception point (TRP) and a reference TRP among I TRPs according to a downlink reference signal; wherein I is a positive integer, and i is a positive integer from 1 to I; sending first information to a network device, wherein the first information comprises a plurality of fields, and the plurality of fields are used to indicate the phase difference information between the i-th TRP and the reference TRP among the I TRPs, and different fields in the plurality of fields correspond to different transmission priorities.

2. A communication method characterized by comprising: The application is applied to a network device, comprising: receiving first information from a terminal device, wherein the first information comprises a plurality of fields, and the plurality of fields are used to indicate phase difference information between an i-th transmission reception point (TRP) and a reference TRP among I TRPs; wherein I is a positive integer, and i is a positive integer from 1 to I; determining the phase difference information between the i-th TRP and the reference TRP among the I TRPs according to the first information.

3. The method of claim 1 or 2, wherein, The phase difference information between the i-th TRP and the reference TRP comprises wideband phase difference information between the i-th TRP and the reference TRP, and / or subband phase difference information between the i-th TRP and the reference TRP.

4. The method of claim 3, wherein, The first information comprises a first field used to carry first indication information, wherein the first indication information indicates that the first information further comprises a second field, or the first indication information indicates that the first information further comprises the second field and a third field; wherein the second field is used to carry the wideband phase difference information between the i-th TRP and the reference TRP, and the third field is used to carry the subband phase difference information between the i-th TRP and the reference TRP.

5. The method of claim 3, wherein, The subband phase difference information between the i-th TRP and the reference TRP comprises subband phase difference information between the i-th TRP and the reference TRP on a first subband among N subbands, and a difference value between the subband phase difference information between the i-th TRP and the reference TRP on a first subband among the N subbands and the subband phase difference information between the i-th TRP and the reference TRP on an n-th subband among the N subbands; wherein N is an integer greater than 1, and n is an integer from 1 to N.

6. The method of claim 5, wherein, The first information comprises a first field used to carry first indication information, wherein the first indication information indicates that the first information further comprises a second field, or the first indication information indicates that the first information further comprises the second field and a third field; wherein the second field is used to carry the subband phase difference information between the i-th TRP and the reference TRP on a first subband among N subbands; and the third field is used to carry the difference value.

7. The method of claim 4 or 6, wherein, The transmission priority of the first field is greater than the transmission priority of the second field, and the transmission priority of the second field is greater than the transmission priority of the third field.

8. The method of claim 7, wherein, The first information includes a first part and a second part, a transmission priority of the first part is higher than a transmission priority of the second part; wherein the first field is included in the first part, and the second field and the third field are included in the second part.

9. The method of claim 3, wherein, The sub-band phase difference information between the i-th TRP and the reference TRP includes sub-band phase difference information between the i-th TRP and the reference TRP on each of N sub-bands, and N is an integer greater than 1.

10. The method of claim 9, wherein, The first information includes a fourth field and a fifth field, a transmission priority of the fourth field is greater than a transmission priority of the fifth field, the fourth field is used to carry sub-band phase difference information between the i-th TRP and the reference TRP on M sub-bands of the N sub-bands, and the fifth field is used to carry sub-band phase difference information between the i-th TRP and the reference TRP on N-M sub-bands of the N sub-bands; wherein the N-M sub-bands include sub-bands other than the M sub-bands in the N sub-bands, and M is a positive integer less than N.

11. The method of claim 10, wherein, The M sub-bands include: The first sub-band in the N sub-bands; or, The first sub-band and the Nth sub-band in the N sub-bands; or, a first sub-band and a second sub-band of the N sub-bands The first sub-band in the N sub-bands; or, the Nth sub-band in the N sub-bands the Nth sub-band; wherein, The first sub-band in the N sub-bands; or, 12. The method of claim 10 or 11, wherein, The first sub-band in the N sub-bands; or, 13. The method of claim 12, wherein, The first sub-band in the N sub-bands; or, 14. The method of claim 13, wherein, The first sub-band in the N sub-bands; or, 15. The method of claim 1 or 2, wherein, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-bands; or, The first sub-band in the N sub-b 16. The method of claim 15, wherein, The first information includes P fields, and a pth field of the P fields is used to carry phase difference information between the ith TRP corresponding to the pth reference signal port and the reference TRP.

17. The method of claim 16, wherein, A transmission priority of a pth field of the P fields is higher than a transmission priority of a (p+1)th field.

18. The method of claim 16 or 17, wherein, The first information includes a seventh field, and a transmission priority of the seventh field is higher than the P fields, and the seventh field is used to carry at least one of the following: Second indication information, the second indication information indicating a reference signal port used for the P reference signal ports; Third indication information, the first indication information indicating that phase difference information carried by the pth field includes wideband phase difference information and / or subband phase difference information; Fourth indication information, the third indication information being used to indicate a correspondence relationship between the P reference signal ports and the P fields.

19. The method of claim 18, wherein, The first information includes a first part and a second part, and a transmission priority of the first part is higher than a transmission priority of the second part; wherein the seventh field is included in the first part, and the P fields are included in the second part.

20. A communications device, characterized by A module for performing the method of any one of claims 1 and 3-19.

21. A communications device, characterized by A module for performing the method of any one of claims 2-19.

22. A communication system, characterized by A communication device for performing the method of any one of claims 1 and 3-19, and a communication device for performing the method of any one of claims 2-19.

23. A communications device, characterized by A processor coupled to the memory, the processor configured to invoke the computer program instructions stored in the memory to perform the method of any one of claims 1-19. The computer readable storage medium has instructions stored thereon, when the instructions are run on a computer, causing the computer to perform the method of any one of claims 1-19.

24. A computer-readable storage medium, characterized in that, The computer readable storage medium has instructions stored thereon, when the instructions are run on a computer, causing the computer to perform the method of any one of claims 1-19.

25. A computer program product, characterized in that, ​

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