Communication method and apparatus

Abstract

Disclosed in the present application are a communication method and apparatus. The method comprises: determining first information; and sending the first information to a second communication apparatus, wherein the first information comprises first sub-information and second sub-information, the first sub-information is used for indicating the phase offset of at least one broadband, and the second sub-information is used for indicating the phase offset of at least one sub-band, the phase offset of the sub-band being the offset of the phase of the sub-band relative to the phase offset of the broadband. The solution clarifies how a first communication apparatus reports to a second communication apparatus the phase offset of a sub-band, and further reduces the bit overhead required for reporting the phase offset.

Description

A communication method and apparatus

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411097706.4, 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, 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, a base station with multi-antenna transmission capability is needed to perform reciprocity correction between each antenna port. In the scenario of coherent joint transmission (CJT) by multiple stations, each antenna port between multiple stations will use joint coherent precoding to send downlink data to a terminal device. Taking two transmission reception points (TRPs) as an example, including TRP1 and TRP2, in order to ensure that the uplink and downlink channel reciprocity holds, 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 TRPs. In the prior art, when performing reciprocity correction between TRPs, the terminal device needs to measure the downlink signals of each TRP, obtain the phase deviation of each TRP relative to the reference TRP, and report the phase deviation of each TRP relative to the reference TRP to the base station, and the base station performs reciprocity correction between TRPs based on the phase deviation.

[0005] At present, further considering the phase deviation of the sub-band reported by the terminal device for base station reciprocity correction. However, how to report the phase deviation of the sub-band has not yet been clearly proposed. SUMMARY

[0006] The embodiments of the present application provide a communication method and apparatus, which clearly propose how to report the phase deviation of the sub-band, and help to improve the accuracy of uplink and downlink channel reciprocity correction.

[0007] In a first aspect, a communication method is provided, which can be applied to a first communication device, which can be a terminal device, or a chip or a chip system or a circuit applied to a terminal device, etc. The method comprises: determining first information; and sending the first information to a second communication device, wherein the first information comprises first sub-information and second sub-information, the first sub-information is used to indicate a phase offset of at least one wideband, and the second sub-information is used to indicate a phase offset of at least one subband, and the phase offset of the subband is a deviation of a phase of the subband from the phase offset of the wideband.

[0008] In the above solution, it is clear how the first communication device reports the phase offset of the subband to the second communication device, i.e., the first communication device reports the phase offset of the subband to the second communication device through the first information. In this solution, the phase offset of the subband reported by the first communication device to the second communication device is a deviation of a phase of the subband from the phase offset of the wideband, which can reduce the numerical fluctuation range of the reported phase offset and save the bit overhead compared with directly sending the inter-subband phase offset from the first communication device to the second communication device.

[0009] In a possible design, the phase offset of the subband is a deviation of a phase of the subband from a phase offset of a wideband corresponding to the subband. The wideband corresponding to the subband can be understood as that a frequency domain range of the subband is located in a frequency domain range of the wideband, or the subband is located on the wideband, or the wideband contains the subband, etc.

[0010] In a possible design, the phase offset of the wideband has a value of any one of the following: a phase of a first subband corresponding to the wideband; and a phase of a middle subband corresponding to the wideband.

[0011] In this design, the phase offset of the wideband has a value of a phase of a subband, which can reduce the implementation complexity.

[0012] In a possible design, the first information further comprises: first indication information, used to indicate a bit overhead of the phase offset of the wideband.

[0013] In this way, the second communication device can determine the bit overhead of the phase offset of the wideband based on the first indication information, and thus accurately obtain the phase offset of the wideband from the first information.

[0014] In a possible design, the first information further comprises: second indication information, used to indicate a bit overhead of the phase offset of the subband.

[0015] In this way, the second communication device can determine the bit overhead of the phase offset of the subband based on the second indication information, and thus accurately obtain the phase offset of the subband from the first information.

[0016] In a possible design, the bit overheads of the phase offsets of the subbands corresponding to different transmission reception points (TRPs) are the same.

[0017] In this way, the second indication information can not distinguish the TRPs, and uniformly indicate the bit overheads of the phase offsets of the subbands for all the TRPs, and the implementation is simple.

[0018] In a possible design, the bit overheads of the phase offsets of the subbands corresponding to the same TRP are the same; and the second indication information includes at least one indication information, the at least one indication information corresponds to at least one TRP in a one-to-one manner, and each indication information in the at least one indication information indicates the bit overhead of the phase offset of the subband corresponding to the TRP corresponding to the indication information.

[0019] In this way, the second indication information can include at least one indication information, the at least one indication information corresponds to at least one TRP in a one-to-one manner, and each indication information in the at least one indication information indicates the bit overhead of the phase offset of the subband corresponding to the TRP corresponding to the indication information, so that the bit overhead of the phase offset of the subband can be better saved while the reporting accuracy is taken into account.

[0020] In a possible design, a first wideband in the at least one wideband corresponds to N SB subbands, N SB is a positive integer; and the second indication information includes N SB indication information, the N SB indication information indicates the bit overhead of the phase offset of the N SB subbands in a one-to-one manner.

[0021] In this way, the bit overhead of the phase offset of each subband is indicated by a corresponding information, and the requirement that the phase offsets of different subbands correspond to different bit overheads can be met.

[0022] In a possible design, a first wideband in the at least one wideband corresponds to Q groups of subbands, Q is a positive integer, and the number of subbands in each group of subbands in the Q groups of subbands is greater than or equal to 1; the second indication information includes Q indication information, the Q indication information respectively indicates the bit overhead of the phase offset of the Q groups of subbands in a one-to-one manner; and the bit overheads of the phase offsets of all the subbands in the same group of subbands are the same.

[0023] In this way, the bit overheads of the phase offsets of different groups of subbands corresponding to the same wideband can be indicated by a plurality of different information, and the number of indication information can be reduced while the requirement that the phase offsets of different subbands correspond to different bit overheads is met.

[0024] In a possible design, the at least one wide band includes a wide band corresponding to each SRS port of the first communication device and each TRP of the second communication device.

[0025] In this way, the joint calibration of multiple SRS ports can be met.

[0026] In a possible design, before determining the first information, the method further includes: receiving radio resource control (RRC) signaling, and a report quantity (ReportQuantity) information element in the RRC signaling is "cjtc-P".

[0027] In a second aspect, a communication method is provided, which can be applied to a second communication device, and the second communication device can be a network device, or a chip or a chip system or a circuit applied to the network device. The method includes: receiving first information from a first communication device; and processing the first information, where the first information includes first sub-information and second sub-information, the first sub-information is used to indicate a phase offset of at least one wide band, and the second sub-information is used to indicate a phase offset of at least one sub-band, and the phase offset of the sub-band is a deviation of a phase of the sub-band relative to a phase offset of a wide band corresponding to the sub-band.

[0028] In a possible design, the phase offset of the sub-band is a deviation of a phase of the sub-band relative to a phase offset of a wide band corresponding to the sub-band.

[0029] In a possible design, the phase offset of the wide band has a value of any one of the following: a phase of a first sub-band corresponding to the wide band; and a phase of a middle sub-band corresponding to the wide band.

[0030] In a possible design, the first information further includes: first indication information, used to indicate a bit overhead of the phase offset of the wide band.

[0031] In a possible design, the first information further includes: second indication information, used to indicate a bit overhead of the phase offset of the sub-band.

[0032] In a possible design, the bit overheads of the phase offsets of the sub-bands corresponding to different transmission and reception points (TRPs) are the same.

[0033] In a possible design, the bit overheads of the phase offsets of the sub-bands corresponding to a same TRP are the same; and the second indication information includes at least one indication information, the at least one indication information corresponds to the at least one TRP in a one-to-one manner, and each indication information in the at least one indication information indicates a bit overhead of a phase offset of a sub-band corresponding to a TRP corresponding to the indication information.

[0034] In a possible design, a first wide band in the at least one wide band corresponds to N SB sub-bands, N SB is a positive integer; and the second indication information includes N SBone indication information, N SB one indication information, N SB bit overhead of the phase offset of the N

[0035] In a possible design, the at least one wide band includes a first wide band, and a second wide band corresponding to each TRP of the second communication device for each SRS port of the first communication device.

[0036] In a possible design, the at least one wide band includes a first wide band, and a second wide band corresponding to each TRP of the second communication device for each SRS port of the first communication device.

[0037] In a possible design, before determining the first information, the method further includes: sending radio resource control (RRC) signaling, and a report quantity (ReportQuantity) information element in the RRC signaling is “cjtc-p”.

[0038] For beneficial effects of the designs of the second aspect, refer to the beneficial effects of the corresponding designs in the first aspect, which will not be repeated here.

[0039] In a third aspect, a communication method is provided, which can be applied to a first communication device, and the first communication device can be a terminal device, or a chip or a chip system or a circuit applied to the terminal device. The method includes: determining second information; and sending the second information to a second communication device, wherein the second information includes third sub-information, and the third sub-information is used to indicate phase offsets of N SB-P first type sub-bands on a first bandwidth part (BWP), N SB-P is a positive integer.

[0040] In the above scheme, it is specified how the first communication device reports the phase offsets of the sub-bands to the second communication device, i.e., the first communication device reports the phase offsets of the first type sub-bands to the second communication device through the second information.

[0041] It should be understood that, in the embodiments of the present application, the “first type sub-band” refers to a sub-band defined according to the sub-band division manner provided in the embodiments of the present application, and the division manner of the first type sub-band can meet the requirements on the size and number of the sub-bands in the reporting quantity being cjtc-p scenario. Of course, the division manner of the first type sub-band can also be used in other scenarios except for cjtc-p, which is not limited.

[0042] The following introduces several possible design manners for the division manner of the first type sub-band.

[0043] In the first possible design, N SB-P The first type of sub-band starts at the first BWP. It is a fixed value, or N SB-P The starting position of each first-class subband on the first BWP relative to the starting position of the first BWP The deviation is a fixed value;

[0044] N SB-P The first type of subband is The corresponding continuous N SB-P Sub-bands, among which The size of the first type of subband. This is the size of the first BWP.

[0045] Under the above design, the first type of subband reported in the first BWP is all the first type of subbands on the first BWP. Therefore, it is not necessary for the first communication device or the second communication device to additionally indicate which subbands are being reported, which can save signaling overhead.

[0046] In the second possible design, the size of the first type 1 subband on the first BWP is: in The size of the first type of subband. This is the starting position of the first BWP;

[0047] like The size of the last subband on the first BWP is: Or, if The size of the last subband on the first BWP is

[0048] in, The size of the first type subbands on the first BWP, excluding the first and last first type subbands.

[0049] Optionally, the method further includes: sending or receiving a bitmap, the bitmap being used to indicate N. SB-P Which first-class subbands are on the first BWP?

[0050] Under the above design, the division method of the first type of subband is the same as that of the second type of subband, with minimal changes to the protocol.

[0051] In the third possible design, the first type of subband on the first BWP is determined based on the second type of subband on the first BWP, each One second-class subband corresponds to one first-class subband, or, each One first-class subband corresponds to one second-class subband; where... For the size of the second type of subband, This refers to the size of the first type of subband;

[0052] Among them, the size of the second type of subband Determine based on the following table:

[0053] Optionally, the method further includes: sending or receiving a bitmap, the bitmap being used to indicate N. SB-P The second-class subband corresponds to the first-class subband.

[0054] Optionally, when the first BWP < 73 PRB, When the first BWP > 1442PRB

[0055] Under the above design, the correspondence between the first type of subband and the second type of subband is relatively clear.

[0056] In the fourth possible design, the first type of subband corresponds to 4 Physical Resource Blocks (PRGs), where the precoding granularity P′ BWPi =2 or 4, the size of the first type of subband Or 16; or, the first type of subband corresponds to 8 PRGs, where the precoding granularity P′ BWP,i =2, the size of the first type of subband is Alternatively, the first type of subband corresponds to 4 PRGs.

[0057] Optionally, the method further includes: sending or receiving a bitmap, the bitmap being used to indicate N. SB-P The first type of subband corresponds to the PRG.

[0058] Under the above design, the correspondence between the first type of subband and the PRG is relatively clear.

[0059] Fourthly, a communication method is provided, which can be applied to a second communication device, which may be a network device, or a chip, chip system, or circuit applied to a network device. The method includes: receiving second information from a first communication device; processing the second information; wherein the second information includes third sub-information, the third sub-information being used to indicate N on a first BWP. SB-P The phase deviation of each first-class subband, N SB-P It is a positive integer.

[0060] In one possible design, N SB-P The first type of sub-band starts at the first BWP. It is a fixed value, or N SB-Pa starting position of the first type of subband on the first BWP is a fixed value relative to a starting position of the first BWP .

[0061] N SB-P the first type of subband is corresponding consecutive N SB-P subbands, where is a size of the first type of subband, is a size of the first BWP.

[0062] In one possible design, a size of the first first type of subband on the first BWP is where is a size of the first type of subband, is a starting position of the first BWP.

[0063] If a size of the last first type of subband on the first BWP is or, if a size of the last first type of subband on the first BWP is

[0064] where is a size of each of the first type of subbands other than the first first type of subband and the last first type of subband on the first BWP.

[0065] In one possible design, the method further includes receiving or transmitting a bitmap, where the bitmap indicates which of the N SB-P first type of subbands are on the first BWP.

[0066] In one possible design, the first type of subbands on the first BWP are determined based on second type of subbands on the first BWP, where each second type of subband corresponds to one first type of subband, or each first type of subband corresponds to one second type of subband; where is a size of the second type of subband, is a size of the first type of subband.

[0067] where the size of the second type of subband is determined based on the following table:

[0068] In one possible design, the method further includes receiving or transmitting a bitmap, where the bitmap indicates which of the N SB-P first type of subbands correspond to second type of subbands.

[0069] In one possible design, the first BWP has 73 PRBs, In one possible design, the first BWP has 1442 PRBs,

[0070] In one possible design, the first type of subband corresponds to 4 PRG, where the precoding granularity P' = 2 or 4, and the size of the first type of subband is 2 or 16; or, the first type of subband corresponds to 8 PRG, where the precoding granularity P' = 2, and the size of the first type of subband is 4. BWP,i In one possible design, the first type of subband corresponds to 4 PRG, where the precoding granularity P' = 2 or 4, and the size of the first type of subband is 2 or 16; or, the first type of subband corresponds to 8 PRG, where the precoding granularity P' = 2, and the size of the first type of subband is 4. BWP,i In one possible design, the first type of subband corresponds to 4 PRG.

[0071] In one possible design, the method further includes receiving or sending a bitmap, where the bitmap is used to indicate PRGs corresponding to the N SB-P first type of subbands.

[0072] The benefits of the designs in the fourth aspect can be found in the benefits of the corresponding designs in the third aspect, and thus are not repeated here.

[0073] In the fifth aspect, a communication apparatus is provided, which includes a module or unit or means for performing the method in the first aspect or in any of the possible designs of the first aspect.

[0074] In an example, the apparatus can include:

[0075] a processing module configured to determine the first information;

[0076] a transceiver configured to send the first information to the second communication apparatus, where the first information includes a first sub-information and a second sub-information, the first sub-information is used to indicate a phase offset of at least one wideband, and the second sub-information is used to indicate a phase offset of at least one subband, where the phase offset of the subband is a difference between a phase of the subband and the phase offset of the wideband.

[0077] In the sixth aspect, a communication apparatus is provided, which includes a module or unit or means for performing the method in the second aspect or in any of the possible designs of the second aspect.

[0078] In an example, the apparatus can include:

[0079] a transceiver configured to receive the first information from the first communication apparatus;

[0080] ​​The processing module is configured to process the first information, wherein the first information comprises first sub-information and second sub-information, the first sub-information is used to indicate phase deviation of at least one wideband, and the second sub-information is used to indicate phase deviation of at least one subband, and the phase deviation of the subband is deviation of a phase of the subband from the phase deviation of the wideband.

[0081] In a seventh aspect, a communication apparatus is provided. The communication apparatus can include means for performing the method in the third aspect or any possible implementation of the third aspect.

[0082] In an example, the apparatus can include:

[0083] The processing module is configured to determine the second information.

[0084] The transceiver is configured to send the second information to the second communication apparatus, wherein the second information comprises third sub-information, and the third sub-information is used to indicate phase deviation of N SB-P first subbands on a first bandwidth part (BWP), N SB-P is a positive integer.

[0085] In an eighth aspect, a communication apparatus is provided. The communication apparatus can include means for performing the method in the fourth aspect or any possible implementation of the fourth aspect.

[0086] In an example, the apparatus can include:

[0087] The transceiver is configured to receive the second information from the first communication apparatus.

[0088] The processing module is configured to process the second information, wherein the second information comprises third sub-information, and the third sub-information is used to indicate phase deviation of N SB-P first subbands on a first BWP, N SB-P is a positive integer.

[0089] In a ninth aspect, a communication apparatus is provided. The communication apparatus can include at least one processor and a communication interface connected with the at least one processor. The at least one processor is configured to cause the apparatus to perform the method in the first aspect or any possible implementation of the first aspect or the second aspect or any possible implementation of the second aspect or the third aspect or any possible implementation of the third aspect or the fourth aspect or any possible implementation of the fourth aspect through the communication interface.

[0090] Optionally, the communication apparatus further includes the memory.

[0091] In a tenth aspect, a computer readable storage medium is provided, which stores a computer program or instructions, when the computer program or instructions are executed by a communication device, implement the method in the first aspect or any possible design of the first aspect or the second aspect or any possible design of the second aspect or the third aspect or any possible design of the third aspect or the fourth aspect or any possible design of the fourth aspect.

[0092] In an eleventh aspect, a computer program product is provided, which stores instructions, when the instructions are run on a computer, cause the computer to execute the method in the first aspect or any possible design of the first aspect or the second aspect or any possible design of the second aspect or the third aspect or any possible design of the third aspect or the fourth aspect or any possible design of the fourth aspect.

[0093] In a twelfth aspect, a communication system is provided, which includes the communication device in the fifth aspect and the communication device in the sixth aspect.

[0094] In a thirteenth aspect, a communication system is provided, which includes the communication device in the seventh aspect and the communication device in the eighth aspect.

[0095] The specific designs and advantages of the fifth aspect to the thirteenth aspect can refer to the corresponding designs and advantages in the first aspect to the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0096] FIG. 1 is a network architecture diagram of a communication system to which embodiments of the present application are applied;

[0097] FIG. 2 is a schematic diagram of terminal reciprocity correction and intra-TRP reciprocity correction;

[0098] FIG. 3 is a schematic diagram of inter-TRP reciprocity correction;

[0099] FIG. 4A is a flowchart of a method for obtaining a phase calibration coefficient;

[0100] FIG. 4B is a schematic diagram of interaction between TRP i, TRP nref and UE;

[0101] FIG. 5 is a flowchart of another method for obtaining a phase calibration coefficient;

[0102] FIG. 6 is a flowchart of a communication method provided by embodiments of the present application;

[0103] FIG. 7 is a schematic diagram of fluctuation range of phase deviation of a subband in two reporting modes;

[0104] FIG. 8 is a schematic diagram of bit overhead of phase deviation of a subband;

[0105] FIG. 9 is a flowchart of another communication method according to an embodiment of the present application;

[0106] FIG. 10A and FIG. 10B are diagrams illustrating an example of a first type of subband division;

[0107] FIG. 11 is a schematic diagram of a communication device according to an embodiment of the present application;

[0108] FIG. 12 is a schematic diagram of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0109] The terms "system" and "network" can be used interchangeably in the embodiments of the present application. The term "and / or" describes an associated relationship between associated objects, and means that three relationships can exist, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally means that the associated objects before and after the character " / " are in an "or" relationship. "At least one" means one or more, and "multiple" means two or more. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items, for example, at least one of a, b or c can mean a, or b, or c, or a and b, or b and c, or a and c, or a and b and c. Unless otherwise stated, the ordinal numbers "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, time sequence, priority or importance of the multiple objects. These terms are only used to distinguish the objects from each other.

[0110] The terms "include" and "have" and any variations thereof in the description of the embodiments of the present application are intended to cover the non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device. It should be noted that in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance or illustration. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present the relevant concept in a specific manner.

[0111] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system. The technical solutions of the embodiments of the present application can also be applied to other communication systems, for example, a public land mobile network (PLMN) system, a long term evolution advanced (LTE-A) system, a 5th generation (5G) system, a new radio (NR) system, a machine to machine (M2M) system, or other future communication systems, and the like, or other various wireless communication systems using wireless access technologies, and the like, all of which can use the technical solutions of the embodiments of the present application.

[0112] For example, FIG. 1 is a schematic diagram of an architecture of a communication system to which the embodiments of the present application can be applied. The communication system 1000 includes a radio access network 100 and a core network 200, and optionally, the communication system 1000 can also include an Internet 300. The radio access network 100 includes at least one access network device, such as 110a and 110b in FIG. 1, and at least one terminal device, such as 120a-120j in FIG. 1. Among them, 110a is a base station, 110b is a micro 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. Among them, the same terminal device or access network device can provide different functions in different application scenarios. For example, the mobile phones in FIG. 1 are 120a, 120e, 120f and 120j, the mobile phone 120a can access the base station 110a, connect the car 120b, communicate directly with the mobile phone 120e and access the HAP, the mobile phone 120b can access the HAP and communicate directly with the mobile phone 120a, the mobile phone 120f can access the micro station 110b, connect the notebook computer 120g, and connect the printer 120h, and the mobile phone 120j can control the drone 120i.

[0113] The terminal device is connected with the access network device, and the access network device is connected with the core network. The core network device and the access network device can be independent and different physical devices, can be integrated with the functions of the core network device and the logical functions of the access network device on the same physical device, and can be a physical device integrated with part of the functions of the core network device and part of the functions of the access network device. The terminal device and the terminal device, and the access network device and the access network device can be connected with each other through a wired or wireless manner. FIG. 1 is only a schematic diagram, and other network devices can also be included in the communication system, such as a wireless relay device and a wireless backhaul device, which are not shown in FIG. 1.

[0114] The access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, etc. The access network device can be a module or unit that completes part of the functions of the base station, for example, can be a central unit (CU), or can be a distributed unit (DU). The access network device can be a macro base station (such as 110a in FIG. 1), or can be a micro base station or an indoor station (such as 110b in FIG. 1), or can be a relay node or a donor node, etc. Embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. In the embodiments of the present application, a base station is taken as an example of the access network device for description.

[0115] In a possible scenario, multiple RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of functions of a base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. The CU and the DU can be separately arranged, or can be included in the same network element, for example, in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0116] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (O-RAN or open RAN or ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are taken as examples for description in this application. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0117] The terminal device can also be referred to as a terminal, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be widely applied to various scenarios, such as device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal device.

[0118] The base station and the UE can be fixed in position or mobile. The base station and the UE can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on an airplane, a balloon, and a man-made satellite in the air. Embodiments of the present application do not limit the application scenarios of the base station and the UE.

[0119] The roles of the base station and the UE can be relative, for example, the helicopter or drone 120i in FIG. 1 can be configured as a mobile base station, and for 120j that accesses the wireless access network 100 through 120i, 120i is a base station; but for the base station 110a, 120i is a UE, that is, 110a and 120i communicate through a wireless air interface protocol. Of course, 110a and 120i can also communicate through a base station-to-base station interface protocol, and in this case, 120i is also a base station relative to 110a. Therefore, the base station and the UE can be collectively referred to as a communication apparatus, 110a and 110b in FIG. 1 can be referred to as a communication apparatus with base station function, and 120a-120j in FIG. 1 can be referred to as a communication apparatus with UE function.

[0120] The base station and the UE, the base station and the base station, and the UE and the UE can communicate through a licensed frequency spectrum, can also communicate through an unlicensed frequency spectrum, and can also simultaneously communicate through the licensed frequency spectrum and the unlicensed frequency spectrum; can communicate through a frequency spectrum below 6 gigahertz (GHz), can also communicate through a frequency spectrum above 6 GHz, and can also simultaneously use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz. Embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.

[0121] It can be understood that the network architecture and service scenarios described in the embodiments of the application are for more clearly illustrating the technical solutions of the embodiments of the application, and do not constitute a limitation on the technical solutions provided by the embodiments of the application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the application are also applicable to similar technical problems.

[0122] The technical features related to the present application are introduced below.

[0123] 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 port of one reference signal, such as a sounding reference signal (SRS) port.

[0124] 2. Coherent joint transmission (CJT): It refers to that multiple stations such as multiple TRPs transmit data for a terminal device through coherent transmission. The multiple TRPs know all data information and channel state information (CSI) between them and the terminal device, so the multiple TRPs can be regarded as a distributed multiple antenna array and can jointly precode the same layer data to be transmitted. The so-called "coherent transmission" means that multiple TRPs can jointly transmit a data stream, so that the transmission signals of multiple TRPs can be superimposed in the same direction when reaching the terminal device, thereby doubling the power of the received signal and greatly reducing the interference. In other words, coherent transmission can convert all interference between multiple TRPs into useful signals, avoid interference between them, and significantly improve data transmission performance.

[0125] 3. Uplink-downlink channel reciprocity: Since electromagnetic wave propagation is reversible, in the scenario of the same frequency band and the same transceiving surface in uplink and downlink (referred to as uplink and downlink), the uplink and downlink channels have the characteristics of equivalence: the road loss, time delay, phase, etc. are the same, and in an ideal case, where H DL represents the downlink channel response, represents the uplink channel response. By using the uplink-downlink channel reciprocity, the base station can directly obtain the uplink channel by the reference signal transmitted by the UE uplink to perform downlink scheduling. In the embodiments of the application, the uplink-downlink channel reciprocity can be simply referred to as channel reciprocity, reciprocity, etc.

[0126] 3. Reciprocity correction:

[0127] In a communication system, the channel amplitude and phase experienced by a signal from the beginning of generation until the end of acquisition at the receiving end is determined by "UE-side hardware + wireless channel response + base station-side hardware": the uplink signal generated by the UE is sent to the transmission medium (air) at the UE side and will experience a multiplicative coefficient After the signal experiences the uplink channel response, it will experience a multiplicative coefficient at the base station side. The downlink signal generated by the base station is sent to the transmission medium at the base station side and will experience a multiplicative coefficient After experiencing the downlink channel response, it will experience a multiplicative coefficient at the UE side. Among them, according to the reciprocity principle, the uplink and downlink channel responses can be obtained by direct transformation, but if and are different, the channel will not have reciprocity, that is, the amplitudes and phases of the uplink and downlink channels are different, which leads to the fact that the downlink channel response cannot be directly obtained from the uplink channel response, and similarly, and are different, which will also lead to the fact that the channel does not have reciprocity. In order to ensure that the uplink and downlink channels have reciprocity, the UE and the base station need to perform reciprocity correction respectively to ensure that and are the same, and and are the same. As shown in FIG. 2, for uplink transmission, the uplink channel response needs to be multiplied by the UE-side sending coefficient on the left, t1…tK respectively corresponding to the sending coefficient on each sending antenna of the UE, and also needs to be multiplied by the base station-side receiving coefficient on the right, r1…rN respectively corresponding to the receiving coefficient on each receiving antenna of the base station. Similarly, for downlink transmission, the downlink channel response needs to be multiplied by the UE-side receiving coefficient on the left, and also needs to be multiplied by the base station-side sending coefficient on the right.

[0128] In order to ensure that the uplink and downlink channel reciprocity holds,

[0129] the difference between and can be solved by terminal-side reciprocity correction; the difference between and can be solved by TRP self-correction, that is, the base station side needs to obtain the value of , so that the base station side can adjust the amplitude and phase of the received channel according to the value of to ensure that the reciprocity holds. It can be understood that is used to represent the uplink multiplicative coefficient of the nth antenna of the base station side and the downlink multiplicative coefficienta parameter of the difference between the two TRPs, for example

[0130] Considering the scenario of multi-TRP CJT, the multi-TRPs jointly transmit a PDSCH to a UE. Assuming that the two TRPs cooperate, the channel experienced by the PDSCH can be expressed as H = [H1 H2], 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 multi-TRP PDSCH transmission is (Tx1+Tx2)*Rx.

[0131] Generally, the above multiplicative coefficients between different TRPs are different, and the impact on reciprocity is as follows: on the basis of intra-TRP correction (TRP1 needs to obtain the value of its own , and TRP2 needs to obtain the value of its own ), additional inter-TRP correction is needed (the relative relationship between and needs to be obtained), as shown in FIG. 3, so as to ensure that reciprocity is also valid for H.

[0132] Considering that the phase has a greater impact, in actual applications, inter-TRP correction can be performed by obtaining a phase calibration coefficient between TRPs.

[0133] For example, referring to FIG. 4A, a flowchart of a method for obtaining a phase calibration coefficient, including the following steps:

[0134] S401, the base station configures N TRP pairs of non-zero power (NZP) channel state information (CSI)-reference signal (RS) resources, the N TRP pairs of NZP CSI-RS resources correspond to N TRP TRPs one-to-one, N TRP is a positive integer greater than 1;

[0135] 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 uplink measurement channel according to the received downlink reference signal, for example, referring to FIG. 4B, a flowchart of a method for obtaining a phase calibration coefficient, including the following steps: TRP- an interaction diagram between the i-th TRP in 1 TRP (denoted as TRP i), a reference TRP (denoted as TRP nref) and a UE, a phase difference of a downlink measurement channel between TRP i and TRP nref can be denoted as:

[0136] wherein R DLi denotes a downlink channel response corresponding to the i-th TRP received by the UE, i is an integer of 0 or less than N TRP -1, and nref is an identification of the reference TRP, denotes a downlink channel response corresponding to the reference TRP received by the UE, and phase() denotes a function of calculating a phase difference; denotes an amplitude of a downlink multiplicative coefficient corresponding to the i-th TRP; denotes phase information of a downlink multiplicative coefficient corresponding to the i-th TRP; h i denotes a downlink channel response corresponding to the i-th TRP (|h i | denotes a modulus value of h i , i.e. an amplitude value); denotes phase information of a downlink channel response corresponding to the i-th TRP; denotes an amplitude of a downlink multiplicative coefficient corresponding to the reference TRP; denotes phase information of a downlink multiplicative coefficient corresponding to the reference TRP; h nref denotes a downlink channel response corresponding to the reference TRP (|h nref | denotes a modulus value of h nref , i.e. an amplitude value); denotes phase information of a downlink channel response corresponding to the reference TRP; denotes a phase of a downlink multiplicative coefficient corresponding to the i-th TRP; denotes a phase of a downlink multiplicative coefficient corresponding to the reference TRP; denotes a phase of a downlink channel response corresponding to the i-th TRP; denotes a phase of a downlink channel response corresponding to the reference TRP.

[0137] It can be understood that N TRP TRPs include N TRP -1 and the reference TRP.

[0138] S403, the UE reports a i ;

[0139] wherein a i may be carried in uplink control information (UCI);

[0140] S404、UE respectively sends uplink reference signal to N TRP TRPs with the same port as the port of receiving downlink reference signal, and correspondingly, N TRP TRPs receive uplink reference signal; N TRP -1 TRP interacts 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 i-th TRP in N TRP -1 TRP and the reference TRP can be expressed as:

[0141] Wherein, H (i) represents the uplink channel response received by the i-th TRP, i is an integer of 0 or less than N TRP -1, nref represents the identity of the reference TRP, H (nref) represents the uplink channel response received by the reference TRP, and phase() represents a function of phase difference; A (i) represents the amplitude of the uplink multiplicative coefficient corresponding to the i-th TRP; represents the phase information of the uplink multiplicative coefficient corresponding to the i-th TRP; H i represents the uplink channel response corresponding to the i-th TRP; represents the phase information of the uplink channel response corresponding to the i-th TRP; A (nref) represents the amplitude of the uplink multiplicative coefficient corresponding to the reference TRP; represents the phase information of the uplink multiplicative coefficient corresponding to the reference TRP; H nref represents the uplink channel response corresponding to the reference TRP; represents the phase information of the uplink channel response corresponding to the reference TRP; represents the phase of the uplink multiplicative coefficient corresponding to the i-th TRP; represents the phase of the uplink multiplicative coefficient corresponding to the reference TRP; represents the phase of the uplink channel response corresponding to the i-th TRP; represents the phase of the uplink channel response corresponding to the reference TRP.

[0142] S405, TRPi obtains the phase calibration coefficient of the i-th TRP relative to the reference TRP based on α i And β i

[0143] For example, referring to FIG. 5, it is a flowchart of another method for obtaining a phase calibration coefficient, including the following steps:

[0144] S501, the base station configures N TRP Set of NZP CSI-RS resources, and the base station configures N​TRP NZP CSI-RS resources and N TRP Each TRP corresponds one-to-one, N TRP It is a positive integer greater than 1;

[0145] S502, UE to N TRP Each TRP sends a single-port SRS, corresponding to N TRP Each TRP receives SRS;

[0146] S503. Each TRP performs channel estimation based on the received SRS and obtains the corresponding channel estimation result;

[0147] For example, the i-th TRP performs channel estimation based on the received SRS and obtains the channel estimation result h. i .

[0148] S504. Each TRP precodes the CSI-RS using the channel estimation results and transmits beamformed CSI-RS. Correspondingly, the UE receives N. TRP One beamformed CSI-RS;

[0149] For example, the i-th TRP uses the channel estimation result h i The CSI-RS is precoded and beamformed CSI-RS-i is sent. Correspondingly, the UE receives beamformed CSI-RS-i.

[0150] It can be understood that this precoding can be maximum ratio radio transmission (MRT) precoding, that is, precoding as...

[0151] S505, the UE selects the TRP corresponding to the CSI-RS with the largest reference signal received power (RSRP) as the reference TRP, such as TRP i = TRP nref; obtain N TRP -1 The phase difference of the downlink measurement channel between each TRP and the reference TRP, such as the phase difference α between TRPi and the reference TRP. i (For specific formulas, please refer to α above) i );

[0152] S506, UE to N TRP -1 TRP reported α i α i This serves as the phase calibration coefficient for the i-th TRP relative to the reference TRP.

[0153] wherein, α i The phase calibration coefficient can be carried in uplink control information (UCI).

[0154] In the above two calibration schemes, the phase calibration coefficient reported by the UE is the phase deviation between TRPs.

[0155] Some technologies propose reporting the phase calibration coefficient of a subband, such as the phase deviation of a subband. For example, the phase deviation of a subband σ is calculated as Φ σ Φ n,σ = Φ n,0 + σΓ n , Γ n is the phase deviation between subband 0 and subband σ, n is the identifier of a TRP, n = 0, 1, 2, … N SB-P , N SB-P is the number of subbands, n ≠ nref, and nref is the identifier of a reference subband. It can be seen that the phase deviation of a subband reported by the terminal device is the phase deviation between subbands.

[0156] Some technologies also propose joint calibration of multiple SRS ports, such as reporting the phase deviation of a subband corresponding to each SRS port in the multiple SRS ports of the terminal device.

[0157] In these scenarios, if the reporting mechanism shown in FIG. 4A or FIG. 5 is followed, a large bit overhead is required. Specifically, in the UCI, the bit overhead of the phase calibration information of a subband is: the number of subbands × the number of TRPs for CJT × the number of quantization bits of the phase calibration information × the number of SRS ports. For example, if the number of subbands is 4, the number of TRPs is 3, the number of phase quantization bits is 5, and the number of SRS ports is 4, the overhead of the reporting in the UCI is about 4*3*5*4 = 240 bits.

[0158] To solve the above technical problem, referring to FIG. 6, a communication method provided by an embodiment of the present application includes the following steps S601-S603:

[0159] S601, a first communication device determines first information.

[0160] In a specific implementation, the first communication device can be a terminal device; or the first communication device can be located in the terminal device, for example, the first communication device is a chip in the terminal device; or the first communication device is a chip or a communication module that can be applied to the terminal device; the present application does not limit this.

[0161] S602, the first communication device sends the first information to a second communication device. Correspondingly, the second communication device receives the first information.

[0162] In specific implementations, the second communication device can be a network device; or the second communication device can be located in a network device, for example, the second communication device is a chip in the network device; or the second communication device is a chip or a communication module that can be applied to a network device; the present application does not make any limitation in this regard.

[0163] In some embodiments, the first communication device sending the first information to the second communication device can be alternatively described as the first communication device reporting the first information to the second communication device.

[0164] S603, the second communication device processes the first information.

[0165] The first information can be UCI, or the first information is contained in UCI, and the embodiments of the present application do not make any limitation in this regard.

[0166] Specifically, the first information includes first sub-information and second sub-information.

[0167] The first sub-information is used to indicate the phase offset of at least one wideband.

[0168] Wherein, the wideband refers to the frequency domain resource length occupied by one TRP (of the second communication device), that is, the frequency domain range corresponding to the frequency domain resource configured for one TRP. It can be understood that when the first communication device includes multiple SRS ports, in the joint calibration scenario of multiple SRS ports, the wideband of one TRP can be reported by the multiple SRS ports of the first communication device respectively for the wideband of the TRP, in which case one TRP can correspond to multiple widebands, and the number of widebands corresponding to the phase offset of at least one wideband actually reported by the first communication device (or the phase offset of the wideband indicated by the first sub-information) is the product of the number of TRPs and the number of SRS ports.

[0169] In a possible implementation, the at least one wideband includes the wideband of each TRP (of the second communication device) corresponding to each SRS port (of the first communication device), in other words, the first communication device indicates the phase offset of the wideband of all TRPs corresponding to all SRS ports to the second communication device through the first sub-information. For example, the first communication device has M SRS ports, and the second communication device has N TRPs, then the first sub-information is used to indicate the phase offset of MxN widebands, and M and N are both positive integers. It can be understood that when N is a positive integer greater than 1, CJT can be implemented based on N TRPs. For ease of understanding, hereinafter, the CJT scenario is taken as an example, that is, N is a positive integer greater than 1. In this way, the demand for joint calibration of multiple SRS ports can be met.

[0170] The second sub-information is used to indicate the phase deviation of at least one sub-band, and the phase deviation of the sub-band is a deviation of a phase of the sub-band from a phase deviation of a wide band.

[0171] The sub-band and the wide band can have a correspondence relationship, for example, a frequency domain range of a sub-band is located in a frequency domain range of a wide band, and the wide band corresponds to the sub-band; otherwise, a frequency domain range of a sub-band is not located in a frequency domain range of a wide band, and the wide band does not correspond to the sub-band. In some embodiments, when a frequency domain range of a sub-band is located in a frequency domain range of a wide band, it can also be said that the sub-band is on the wide band, or the wide band contains the sub-band.

[0172] Correspondingly, the phase deviation of the sub-band specifically refers to a deviation of a phase of the sub-band from a phase deviation of a wide band corresponding to the sub-band.

[0173] For example, the frequency range of the wide band 1 is 410 MHz to 7125 MHz, and the frequency range of the sub-band 1 is 410 MHz to 410 MHz+30 KHz, and the wide band corresponding to the sub-band 1 is the wide band 1. Of course, this is only an example, and does not represent the actual division of the sub-band frequency range and the wide band frequency range.

[0174] In the embodiments of the present application, the second communication device processing the first information can include: determining the phase deviation of at least one wide band and the phase deviation of at least one sub-band according to the first information.

[0175] Optionally, the first information can be used by the second communication device to perform channel reciprocity correction. Correspondingly, the second communication device processing the first information can also include: the second communication device performing signal reciprocity correction based on the first information. For example, the second communication device can obtain at least one of the phase deviation between sub-bands in the same TRP, the phase deviation between sub-bands in different TRPs based on the phase deviation of each of the at least one sub-band, the phase deviation of the wide band corresponding to each of the at least one sub-band. Further, the second communication device can perform channel reciprocity correction within the TRP according to the phase deviation between sub-bands in the same TRP, perform channel reciprocity correction between TRPs according to the phase deviation between sub-bands in different TRPs, and the like.

[0176] In the above scheme, the phase deviation of the sub-band reported by the first communication device to the second communication device is a deviation of a phase of the sub-band from a phase deviation of a wide band, which can reduce the numerical fluctuation range of the reported phase deviation compared with the first communication device directly sending the phase deviation between sub-bands to the second communication device, thereby achieving reporting the phase deviation of the sub-band with less bit overhead.

[0177] For example, referring to FIG. 7, the upper diagram in FIG. 7 illustrates a fluctuation range of the phase deviation of the subband when the phase deviation of the subband is the deviation of the phase of the subband from the phase of the reference subband, and the quantization bits of the phase deviation of the subband need 5 bits; the lower diagram in FIG. 7 illustrates a fluctuation range of the phase deviation of the subband when the phase deviation of the subband is the deviation of the phase of the subband from the phase deviation of the wideband, and the quantization bits of the phase deviation of the subband need 3 bits. It can be seen that the overhead of the phase deviation of each subband in the UCI can be reduced by 2 bits. Still taking the example of the number of subbands being 4, the number of TRPs being 3, and the number of SRS ports being 4, the overhead of the subband reporting in the UCI is about 4*3*3*4=144 bits, and the overall reduction is 240-144=96 bits.

[0178] In a possible scenario, before determining the first information, the first communication apparatus further includes: receiving radio resource control (RRC) signaling, and the RRC signaling carries a ReportQuantity information element (IE) of "cjtc-P" (which can be described as: ReportQuantity=cjtc-P).

[0179] The ReportQuantity IE is used for uplink-downlink channel reciprocity calibration. When the ReportQuantity IE is specifically used to indicate the information reported by the first communication apparatus, the information is used by the second communication apparatus to perform uplink-downlink channel reciprocity calibration. For example, when the ReportQuantity IE is cjtc-P, it indicates that the first communication apparatus reports the phase difference information between the target TRP and the reference TRP.

[0180] In a possible implementation, the value of the phase deviation of the wideband can be the phase of one subband.

[0181] Example 1: The value of the phase deviation of the wideband is the phase of the first subband corresponding to the wideband (which can be denoted as SB0). The first subband corresponding to the wideband refers to a subband whose frequency domain range is located at the start position of the frequency domain range of the wideband; or in other words, a subband whose frequency domain range has the smallest numerical value among all the subbands corresponding to the wideband; or in other words, a subband whose subband index value is the smallest among all the subbands corresponding to the wideband, and the like.

[0182] Example 2: The value of the phase deviation of the wideband is the phase of the middle subband corresponding to the wideband (which can be denoted as SB N / 2 , where N is the number of subbands corresponding to the wideband). The middle subband corresponding to the wideband refers to a subband whose frequency domain range is located at the middle position of the frequency domain range of the wideband; or in other words, a subband whose frequency domain range has the median value among all the subbands corresponding to the wideband; or in other words, a subband whose subband index value is the median among all the subbands corresponding to the wideband, and the like.

[0183] In Example 3, the phase offset of the wideband is the phase of the last subband corresponding to the wideband (which can be denoted as SB N-1 The last subband corresponding to the wideband refers to a subband whose frequency domain range is located at the end of the frequency domain range of the wideband; or, in other words, a subband whose frequency domain range has the largest value among all subbands corresponding to the wideband; or, in other words, a subband whose subband index value is the largest among all subbands corresponding to the wideband, and the like.

[0184] In Example 4, the phase offset of the wideband is a statistical value (such as an average value) of the phases of all subbands corresponding to the wideband.

[0185] It can be understood that the above is only an example, and is not limited thereto in practice.

[0186] Through this implementation manner, the complexity of implementation can be reduced.

[0187] In a possible implementation manner, the bit overheads of the phase offsets of the widebands corresponding to different TRPs are the same. For example, the second communication device includes TRP1 and TRP2, and the bit overhead of the wideband corresponding to TRP1 and the bit overhead of the wideband corresponding to TRP2 are both 5 bits. Of course, this is only an example, and the actual overhead is not limited thereto. In this implementation manner, the bit overhead of the phase offset of the wideband is designed to be simple to implement.

[0188] In another possible implementation manner, the bit overheads of the phase offsets of the widebands corresponding to different TRPs are different. For example, the second communication device includes TRP1 and TRP2, the bit overhead of the wideband corresponding to TRP1 is 5 bits, and the bit overhead of the wideband corresponding to TRP2 is 4 bits. Of course, this is only an example, and the actual overhead is not limited thereto. In this design implementation manner, different phase offsets of the widebands can be designed for each TRP according to requirements, further saving the bit overhead.

[0189] In a possible implementation manner, the phase offset of the wideband can be reported by the first communication device to the second communication device, for example, the bit overhead of the phase offset of the wideband is indicated in the first information. Specifically, the first information can further include: first indication information, used to indicate the bit overhead of the phase offset of the wideband.

[0190] It can be understood that the first indication information can be one or more indication information. For example, the bit overheads of the phase offsets of all widebands are the same, and the first indication information is one information. For example, the bit overheads of the phase offsets of the widebands corresponding to the same TRP are the same, the bit overheads of the phase offsets of the widebands corresponding to different TRPs are the same or different, and the first indication information contains the same number of information as the number of TRPs, wherein one information indicates the bit overhead of the phase offset of the wideband corresponding to one TRP, and different information respectively indicates the bit overhead of the phase offset of the wideband corresponding to different TRPs. Of course, the above is only some examples, and is not limited thereto.

[0191] In another possible implementation, the bit overhead of the phase offset of the wideband is indicated by the second communication device or other network equipment to the first communication device. Wherein, the second communication device or other network equipment indicates the bit overhead of the phase offset of the wideband in the manner of the above-mentioned implementation of the first indication information, which will not be repeated here.

[0192] In another possible implementation, the bit overhead of the phase offset of the wideband is predefined, for example, the protocol specifies the phase offset of the wideband.

[0193] In a possible implementation, the bit overheads of the phase offsets of the subbands corresponding to different TRPs are the same. This implementation is simple to implement.

[0194] In another possible implementation, the bit overheads of the phase offsets of the subbands corresponding to different TRPs are the same. For the same TRP, the bit overheads of the phase offsets of different subbands can be the same or different, which is not limited. This design implementation can design different phase offsets of subbands for each TRP according to the needs, further saving the bit overhead.

[0195] For any one of the above two implementations, the bit overheads of the phase offsets of the subbands corresponding to different widebands corresponding to the same TRP (i.e. the widebands corresponding to different SRS ports corresponding to the same TRP) can be the same or different, which is not limited.

[0196] Further, the bit overheads of the phase offsets of different subbands corresponding to the same wideband (or different subbands on the same wideband) can be the same or different, which is not limited. The following introduces a specific implementation of the phase offset of the subband corresponding to the first wideband:

[0197] In a possible implementation, in the subbands corresponding to the first wideband, the bit overheads of the phase offsets of all subbands are the same, for example, all are 3 bits. It should be understood that 3 bits here is only an example, and is not limited thereto.

[0198] In another possible implementation, the bit overheads of the phase offsets of different subbands in the first wideband can be different.

[0199] For example, all the subbands (e.g., N SB-P subbands) corresponding to the first wideband can be divided into Q groups, Q being a positive integer, and the number of subbands in each group being greater than or equal to 1; the bit overheads of the phase offsets of the subbands in the same group are the same, and the bit overheads of the phase offsets of the subbands in different groups are different.

[0200] For example, referring to FIG. 8, the bit overheads of the subbands corresponding to the first wideband are sequentially increased from the center subband to both sides, taking the phase offset of the center subband as an example. In FIG. 8, all the subbands (e.g., N SB-P subbands) corresponding to the first wideband can be divided into three groups, and the bit overheads are 1 bit, 2 bits, and 3 bits in sequence. The actual grouping manner is not limited thereto.

[0201] In a possible implementation, the phase offset of a subband can be reported by the first communication device to the second communication device, for example, the bit overhead of the phase offset of the subband is indicated in the first information. Specifically, the first information can further include second indication information used to indicate the bit overhead of the phase offset of the subband.

[0202] In combination with the different implementations of the phase offset of the subband, the content included in the first indication information can be different. Some possible examples are listed below.

[0203] Example 1: The bit overheads of the phase offsets of the subbands corresponding to different TRPs are the same. In this case, the second indication information can not distinguish the TRPs, and uniformly indicates the bit overhead of the phase offset of the subband for all the TRPs.

[0204] Further, when the bit overheads of the phase offsets of different subbands corresponding to the same wideband are the same, the second indication information can be one information, and the bit overhead of the phase offset indicated by the information is for all the subbands of all the widebands.

[0205] For example, the second communication device includes TRP1 and TRP2, where TRP1 corresponds to wideband 1 and TRP2 corresponds to wideband 2. Each of the wideband 1 and the wideband 2 includes subband 1 and subband 2. The second indication information includes only one information, and the bit overhead of the phase offset indicated by the information is for each subband of each wideband.

[0206] When the bit overheads of the phase offsets of different subbands corresponding to the same wideband are different, the second indication information can be multiple different information, respectively indicating the bit overhead of the phase offset of different subbands, or respectively indicating the bit overhead of the phase offset of different groups of subbands.

[0207] For example, the second communication device includes TRP1, TRP2, wherein TRP1 corresponds to wideband 1, and TRP2 corresponds to wideband 2. Each of the wideband 1 and the wideband 2 includes subband 1, subband 2 and subband 3. The second indication information includes information 1, information 2 and information 3. The information 1 indicates the bit overhead of the phase offset of the subband 1, and the information 1 is for the subband 1 of the wideband 1 and the wideband 2 at the same time. The information 2 indicates the bit overhead of the phase offset of the subband 2, and the information 2 is for the subband 2 of the wideband 1 and the wideband 2 at the same time. The information 3 indicates the bit overhead of the phase offset of the subband 3, and the information 3 is for the subband 3 of the wideband 1 and the wideband 2 at the same time.

[0208] For example, the second communication device includes TRP1, TRP2, wherein TRP1 corresponds to wideband 1, and TRP2 corresponds to wideband 2. Each of the wideband 1 and the wideband 2 includes subband 1, subband 2 and subband 3, wherein the subband 1 corresponds to one group, and the subband 2 and the subband 3 correspond to another group. The second indication information includes information 1 and information 2. The information 1 indicates the bit overhead of the phase offset of the subband 1 and the subband 2, and the information 1 is for the subband 1 and the subband 2 of the wideband 1 and the wideband 2 at the same time. The information 2 indicates the bit overhead of the phase offset of the subband 3, and the information 2 is for the subband 3 of the wideband 1 and the wideband 2 at the same time.

[0209] It can be understood that the above examples are taken as an example that one TRP corresponds to one wideband (i.e. single SRS port), when one TRP corresponds to multiple widebands (i.e. multiple SRS ports), the bit overhead of the phase offset of the subbands corresponding to different widebands can be the same or different. Optionally, the bit overhead of the phase offset of the subbands corresponding to different widebands corresponding to one TRP is the same, and the bit overhead of the phase offset of the subbands corresponding to different widebands can be indicated by the same (or same group) information. Optionally, the bit overhead of the phase offset of the subbands corresponding to different widebands corresponding to one TRP is different, and the bit overhead of the phase offset of the subbands corresponding to different widebands can be indicated by different (or different group) information.

[0210] Example 2, the bit overhead of the phase offset of the subbands corresponding to different TRPs can be different. In this case, the second indication information can include at least one indication information (or at least one group of information), the at least one indication information (or at least one group of information) corresponds to at least one TRP one by one, and each indication information in the at least one indication information (or each group of information in the at least one group of information) indicates the bit overhead of the phase offset of the subbands corresponding to the TRP corresponding to the indication information.

[0211] Further, when the bit overhead of the phase offset of different subbands corresponding to the same wideband can be the same, the bit overhead of the phase offset of the subbands corresponding to one wideband can be indicated by one information.

[0212] For example, the second communication device includes TRP1 and TRP2, where TRP1 corresponds to broadband 1 and TRP2 corresponds to broadband 2. Each broadband in broadband 1 and broadband 2 includes sub-band 1 and sub-band 2. The second indication information includes information 1 and information 2, where information 1 indicates the bit overhead of the phase deviation for each sub-band of broadband 1, and information 2 indicates the bit overhead of the phase deviation for each sub-band of broadband 2.

[0213] When the bit overhead of phase deviation for different subbands corresponding to the same broadband is different, the bit overhead of phase deviation for different subbands corresponding to a broadband can be indicated by multiple different information, or the bit overhead of phase deviation for different subband groups corresponding to a broadband can be indicated by multiple different information.

[0214] For example, the second communication device includes TRP1 and TRP2, where TRP1 corresponds to broadband 1 and TRP2 corresponds to broadband 2. Each broadband in broadband 1 and broadband 2 includes subband 1 and subband 2. The second indication information includes information 1, information 2, information 3, and information 4. The bit overhead of the phase deviation indicated by information 1 is for subband 1 of broadband 1, the bit overhead of the phase deviation indicated by information 2 is for subband 2 of broadband 1, the bit overhead of the phase deviation indicated by information 3 is for subband 1 of broadband 2, and the bit overhead of the phase deviation indicated by information 4 is for subband 2 of broadband 2.

[0215] For example, the second communication device includes TRP1 and TRP2, where TRP1 corresponds to broadband 1 and TRP2 corresponds to broadband 2. Each broadband in broadband 1 and broadband 2 includes subband 1, subband 2, and subband 3, where subband 1 corresponds to one packet, and subband 2 and subband 3 correspond to another packet. The second indication information includes information 1, information 2, information 3, and information 4. Information 1 indicates the bit overhead of the phase deviation for subband 1 of broadband 1, information 2 indicates the bit overhead of the phase deviation for subband 2 and subband 3 of broadband 1, information 3 indicates the bit overhead of the phase deviation for subband 1 of broadband 2, and information 4 indicates the bit overhead of the phase deviation for subband 2 and subband 3 of broadband 2.

[0216] It can be understood that the above examples are taken as one TRP corresponding to one wideband (i.e., single SRS port), and when one TRP corresponds to multiple widebands (i.e., multiple SRS ports), the phase offset overheads of the subbands corresponding to different widebands can be the same or different. Optionally, when the phase offset overheads of the subbands corresponding to different widebands corresponding to one TRP are the same, the phase offset overheads of the subbands corresponding to different widebands can be indicated by the same (or same group) information. Optionally, when the phase offset overheads of the subbands corresponding to different widebands corresponding to one TRP are different, the phase offset overheads of the subbands corresponding to different widebands can be indicated by different (or different group) information.

[0217] Of course, the above are only some possible examples, and the specific content of the second indication information is not limited thereto.

[0218] In another possible implementation, the bit overhead of the phase offset of the subband is indicated by the second communication device or other network equipment to the first communication device. Wherein, the second communication device or other network equipment indicates the bit overhead of the phase offset of the subband in the manner of the implementation of the second indication information, which will not be exemplified and expanded here.

[0219] In yet another possible implementation, the bit overhead of the phase offset of the subband is predefined, for example, the protocol specifies the phase offset of the subband.

[0220] In some scenarios, the subband is defined according to Table 1 as follows:

[0221] Table 1

[0222] Table 1 specifies the size of the subband under each BWP size, and the number of subbands can be determined according to the BWP size and the subband size.

[0223] However, in the reporting quantity is cjt c-p scenario, the subband size is a value, such as 8 PRB or 16 PRB, and the maximum number of subbands in the reported wideband is a fixed value, for example, 4. In this case, the subband division method (or subband determination method) based on Table 1 is no longer applicable. It can be understood that in the embodiments of the present application, "X PRB (X is a number)" means X PRB, for example, 8 PRB means 8 PRB, and 16 PRB means 16 PRB.

[0224] In view of this, referring to FIG. 9, another communication method provided by the embodiments of the present application includes the following steps S901-S903:

[0225] S901, the first communication device determines the second information.

[0226] Similarly, the first communication device can be a terminal device; or the first communication device can be located in a terminal device, for example, the first communication device is a chip in the terminal device; or the first communication device is a chip or a communication module that can be applied to a terminal device; the present application does not make any limitation.

[0227] S902, the first communication device sends second information to the second communication device. Correspondingly, the second communication device receives the second information.

[0228] Similarly, the second communication device can be a network device; or the second communication device can be located in a network device, for example, the second communication device is a chip in the network device; or the second communication device is a chip or a communication module that can be applied to a network device; the present application does not make any limitation.

[0229] In some embodiments, the first communication device sending the second information to the second communication device can be alternatively described as the first communication device reporting the second information to the second communication device.

[0230] S903, the second communication device processes the second information.

[0231] The second information includes third sub-information, and the third sub-information is used to indicate phase deviations of N SB-P first type subbands on the first BWP, N SB-P is a positive integer.

[0232] In a specific implementation, N SB-P may be a preset value, for example, 4. Of course, this is only an example, and the actual implementation is not limited thereto.

[0233] In a specific implementation, in addition to the phase deviations of the N SB-P first type subbands on the first BWP, the second information can also include phase deviations of first type subbands on other BWPs, without any limitation.

[0234] It should be understood that the embodiment shown in FIG. 9 can be implemented alone or in combination with the embodiment shown in FIG. 6, without any limitation. For example, the second information is the same information as the first information in the foregoing description, the third sub-information is the same information as the second sub-information in the foregoing description, and the phase deviation of the first type subband is the deviation of the phase of the first type subband relative to the phase deviation of the wideband. It can be understood that the wideband in the foregoing description can be a part of the BWP or the entire BWP. Or for example, the first information and the second information are different information, and the phase deviation of the first type subband indicated by the third sub-information is the deviation of the phase of the first type subband relative to the phase of the reference subband.

[0235] It should be understood that the "first type of subband" in the embodiments of the present application refers to a subband defined according to a subband division manner (or subband determination manner) provided in the embodiments of the present application (for a specific division manner, refer to the description below). The division manner of the first type of subband can meet the requirements of the size and quantity of subbands in the reporting quantity being cjtc-p scenario. The first type of subband can be different from the subbands divided based on the above table 1. In order to facilitate the distinction, the subbands divided based on the above table 1 are referred to as "second type of subband".

[0236] The following takes the first BWP as an example to introduce the division manner (or determination manner) of the first type of subband in the embodiments of the present application, and i is used to represent the index of the first BWP. The implementation manner of the first type of subband on other BWPs can refer to the implementation manner of the first type of subband on the first BWP.

[0237] In a possible implementation manner, the starting position (denoted by below) of the N SB-P first type of subbands on the first BWP is a fixed value, or the deviation of the starting position of the N SB-P first type of subbands on the first BWP relative to the starting position (denoted by below) of the first BWP is a fixed value.

[0238] The N SB-P first type of subbands are corresponding continuous N SB-P subbands, where is the size of the first type of subband, is the size of the first BWP.

[0239] In this implementation manner, the first type of subband reported in the first BWP is all the first type of subbands on the first BWP, so it can not be necessary for the first communication device or the second communication device to additionally indicate which subbands are reported, and the signaling overhead can be saved.

[0240] In another possible implementation manner, the size of each first type of subband on the first BWP, except the size of the first first type of subband and the size of the last first type of subband, is

[0241] The size of the first first type of subband on the first BWP is: is the starting position of the first BWP.

[0242] If , the size of the last subband on the first BWP is: Or, if , the size of the last subband on the first BWP is wherein, is the size of the first BWP.

[0243] Further, considering the number N of the first type of subbands reported in the first BWP SB-P which can be less than the number of the first type of subbands on the first BWP, thus the first type of subbands reported in the first BWP can be indicated by a bitmap.

[0244] Specifically, the first communication device can send a bitmap to the second communication device, and the second communication device receives the bitmap; or the second communication device can send a bitmap to the first communication device, and the first communication device receives the bitmap. The length of the bitmap can be i.e. contains bits, respectively corresponding to first type of subbands on the first BWP.

[0245] In this implementation, the division manner of the first type of subbands follows the division manner of the second type of subbands, and the protocol change is small.

[0246] In another possible implementation, the first type of subbands on the first BWP is determined according to the second type of subbands on the first BWP, and each second type of subband corresponds to a first type of subband, or each first type of subband corresponds to a second type of subband; wherein, is the size of the second type of subband, is the size of the first type of subband.

[0247] For example, FIG. 10A is an example with the first BWP size = 36 PRBs and the second type of subband size = 4 PRBs. The left part of FIG. 10A schematically shows the division manner of the second type of subband, and the right part schematically shows the division manner of the second type of subband. In FIG. 10A, each two second type of subbands correspond to a first type of subband, i.e. the first type of subband 0 corresponds to the second type of subbands 0 and 1, the first type of subband 1 corresponds to the second type of subbands 2 and 3, the first type of subband 2 corresponds to the second type of subbands 4 and 5, the first type of subband 3 corresponds to the second type of subbands 6 and 7, and the second type of subband 8 is the remaining subband.

[0248] For example, FIG. 10B is an example of a first BWP size = 160 PRBs, and a second type of sub-band size = 16 PRBs. The left part of FIG. 10B shows a second type of sub-band division manner, and the right part of FIG. 10B shows a second type of sub-band division manner. In FIG. 10B, every two first type of sub-bands correspond to one second type of sub-band, for example, the second type of sub-band 0 corresponds to the first type of sub-band 0 and 1, the second type of sub-band 1 corresponds to the first type of sub-band 2 and 3, and so on, and the second type of sub-band 8 corresponds to the second type of sub-band 16 and 17.

[0249] Of course, the above is only two possible examples, and the actual is not limited thereto.

[0250] Optionally, when the first BWP < 73 PRBs, when the first BWP > 1442 PRBs,

[0251] Optionally, the first type of sub-band reported in the first BWP can be indicated by a bitmap,

[0252] In one specific example, a bitmap can be defined for the first type of sub-band, and the bitmap is used to indicate which sub-bands of the N SB-P first type of sub-bands reported in the first BWP. The number of bits of the bitmap is the same as the number of first type of sub-bands in the first BWP.

[0253] In another specific example, the bitmap for the second type of sub-band can be reused, and the bitmap is used to indicate which sub-bands of the N SB-P first type of sub-bands reported in the first BWP, or in other words, the bitmap is used for the N SB-PThe second type of subband corresponding to the first type of subband. For example, the bitmap in the ReportQuantity = "cJTC-d" or "cJTC-f" scenario can be multiplexed, or the bitmap in the codebook config or CSI-report config scenario can be multiplexed. Among them, cJTC-d is used to indicate the reporting of the time delay difference information between the reference TRP and the target TRP; cJTC-f is used to indicate the reporting of the frequency difference information between the reference TRP and the target TRP; codebook config is used to indicate the configuration of the codebook; CSI-report config is used to configure the periodic or semi-static report sent on the physical uplink control channel (PUCCH) in the cell containing the CSI-ReportConfig, or to configure the semi-static or aperiodic report sent on the PUSCH triggered by the received downlink control information (DCI) in the cell containing the CSI-ReportConfig.

[0254] Similarly, the bitmap can be sent by the first communication device to the second communication device, or by the second communication device to the first communication device, without limitation.

[0255] In this implementation, the correspondence between the first type of subband and the second type of subband is relatively clear.

[0256] In another possible implementation, the division manner of the first type of subband can be aligned with the division manner of the physical resource block group (PRG).

[0257] For example, the first type of subband corresponds to 4 PRGs, and the precoding granularity P' BWP,i = 2 or 4, and the size of the first type of subband is or 16; or,

[0258] The first type of subband corresponds to 8 PRGs, and the precoding granularity P' BWP,i = 2, and the size of the first type of subband is or,

[0259] The first type of subband corresponds to 4 PRGs.

[0260] In one specific example, a bitmap can be defined for the first type of subband, which indicates which N SB-P first type of subbands are reported in the first BWP through the bitmap. The number of bits of the bitmap is the same as the number of the first type of subbands on the first BWP.

[0261] In another specific example, the PRGs can be indicated by a bitmap, and in turn, the N SB-P first type of subbands are indicated by the bitmap, or in other words, the PRGs corresponding to the N SB-P first type of subbands are indicated by the bitmap.

[0262] Similarly, the bitmap can be sent by the first communication device to the second communication device, or by the second communication device to the first communication device, without limitation.

[0263] In this implementation, the correspondence between the first type of subbands and the PRGs is relatively clear.

[0264] The above scheme clearly indicates how the first communication device reports the phase offset of the subbands to the second communication device, i.e., the first communication device reports the phase offset of the first type of subbands to the second communication device through the second information, and clearly indicates how the subbands corresponding to the phase offset of the subbands reported by the first communication device to the second communication device are divided (or determined), which helps to improve the accuracy of channel reciprocity correction.

[0265] It should be understood that the above-described division of the first type of subbands is an example in the context of reporting the phase offset of the subbands, and in actual application, the division of the first type of subbands described in the embodiments of the present application is not limited to being used in the context of reporting the phase offset of the subbands, but is also applicable to any other context involving subbands.

[0266] It can be understood that each of the above embodiments can be implemented independently or in combination, without limitation.

[0267] The above describes the method provided by the embodiments of the present application in combination with the drawings, and the following describes the device provided by the embodiments of the present application in combination with the drawings.

[0268] Based on the same technical concept, the embodiments of the present application provide a communication device, which includes a module / unit / means for executing the method performed by any of the devices in the above method embodiments. The module / unit / means can be implemented by software or by hardware, or by executing corresponding software by hardware.

[0269] For example, referring to FIG. 11, the device can include a transceiver module 1101 and a processing module 1102.

[0270] The transceiver module 1101 can execute the method steps performed by any of the devices in the above method embodiments under the control of the processing module 1102.

[0271] The transceiver module 1101 and the processing module 1102 are described in detail above, and the detailed description is directly referred to herein.

[0272] Based on the same technical concept, the embodiment of the application further provides a communication device, as shown in FIG. 12, comprising: at least one processor 1201; and a communication interface 1203 connected with the at least one processor 1201; the at least one processor 1201 executes the instructions stored in the memory 1202, so that the device executes the method steps executed by any device in the above method embodiments through the communication interface 1203.

[0273] Optionally, the memory 1202 is located outside the device.

[0274] Optionally, the device comprises the memory 1202, the memory 1202 is connected with the at least one processor 1201, and the memory 1202 stores instructions executable by the at least one processor 1201. The memory 1202 is optional for the device as shown in FIG. 12.

[0275] The processor 1201 and the memory 1202 can be coupled through an interface circuit or integrated together, which is not limited here.

[0276] The specific connection medium between the processor 1201, the memory 1202 and the communication interface 1203 is not limited in the embodiment of the application. In FIG. 12, the processor 1201, the memory 1202 and the communication interface 1203 are connected through a bus 1204, and the bus is represented by a thick line in FIG. 12. The connection mode between other components is only schematically illustrated, and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience, only one thick line is used to represent the bus in FIG. 12, but it does not mean that there is only one bus or only one type of bus.

[0277] It should be understood that the processor mentioned in the embodiment of the application can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented by software, the processor can be a general-purpose processor which reads software codes stored in the memory to implement.

[0278] The processor can be, for example, a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor, or the processor can be any conventional processor, etc.

[0279] It should be understood that the memory mentioned in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

[0280] It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, the memory (storage module) can be integrated in the processor.

[0281] It should be noted that the memory described in the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0282] Based on the same technical concept, the embodiments of the present application further provide a computer readable storage medium, which is used for storing instructions, and when the instructions are executed, the method performed by any of the apparatuses in the above method embodiments is realized.

[0283] Based on the same technical concept, the embodiments of the present application further provide a chip, which is coupled with a memory, and is used for reading and executing program instructions stored in the memory, to realize the method performed by any of the apparatuses in the above method embodiments.

[0284] Based on the same technical concept, the embodiments of the present application further provide a computer program product containing instructions, and when the computer program product is run on a computer, the computer executes the method performed by any of the apparatuses in the above method embodiments.

[0285] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore,

[0286] The present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) containing computer-usable program code.

[0287] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0288] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction apparatus, which realizes the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0289] These computer program instructions can also be loaded into a computer or other programmable data processing devices, so that a series of operational steps are generated to realize the computer-implemented processes, and the instructions executed on the computer or other programmable devices provide steps for realizing the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

Claims

1. A communication method characterized by comprising: The method applied to a first communication device comprises: determining first information; sending the first information to a second communication device; wherein the first information comprises first sub-information and second sub-information, the first sub-information is used to indicate a phase offset of at least one wideband, and the second sub-information is used to indicate a phase offset of at least one sub-band, the phase offset of the sub-band is a deviation of a phase of the sub-band relative to a phase offset of the wideband.

2. A communication method characterized by comprising: The method applied to a second communication device comprises: receiving first information from a first communication device; processing the first information; wherein the first information comprises first sub-information and second sub-information, the first sub-information is used to indicate a phase offset of at least one wideband, and the second sub-information is used to indicate a phase offset of at least one sub-band, the phase offset of the sub-band is a deviation of a phase of the sub-band relative to a phase offset of the wideband.

3. The method of claim 1 or 2, wherein, The phase offset of the sub-band is a deviation of a phase of the sub-band relative to a phase offset of a wideband corresponding to the sub-band.

4. The method according to any one of claims 1 to 3, characterized in that, The phase offset of the wideband has a value of any one of the following: a phase of a first sub-band corresponding to the wideband; a phase of a middle sub-band corresponding to the wideband.

5. The method according to any one of claims 1 to 4, characterized in that, The first information further comprises: first indication information used to indicate a bit overhead of the phase offset of the wideband.

6. The method according to any one of claims 1 to 5, wherein, The first information further comprises: second indication information used to indicate a bit overhead of the phase offset of the sub-band.

7. The method of claim 6, wherein, The bit overheads of the phase offsets of the sub-bands corresponding to different transmission and reception points (TRPs) are the same.

8. The method of claim 6, wherein, The bit overheads of the phase offsets of the sub-bands corresponding to the same TRP are the same. The second indication information comprises at least one indication information, the at least one indication information corresponds to at least one TRP in a one-to-one manner, and each indication information in the at least one indication information indicates a bit overhead of a phase offset of a sub-band corresponding to the TRP corresponding to the indication information.

9. The method according to any one of claims 6 to 8, wherein, A first wideband of the at least one wideband corresponds to N SB subbands, N SB being a positive integer; The second indication information includes N SB pieces of indication information, and the N SB pieces of indication information one-to-one correspond to bit overheads of phase deviations of the N SB subbands.

10. The method according to any one of claims 6 to 8, wherein, The first wideband in the at least one wideband corresponds to Q groups of sub-bands, Q is a positive integer, and the number of sub-bands in each group of sub-bands in the Q groups of sub-bands is greater than or equal to 1. The second indication information comprises Q indication information, the Q indication information respectively and one-to-one indicates a bit overhead of a phase offset of the Q groups of sub-bands; and the bit overheads of the phase offsets of all sub-bands in the same group of sub-bands are the same.

11. The method of any one of claims 1-10, wherein, The at least one wideband comprises a wideband of each TRP of the second communication device corresponding to each SRS port of the first communication device.

12. The method of any one of claims 1, 3-11, wherein, Before the determining the first information, the method further comprises: receiving radio resource control (RRC) signaling, and a report quantity (ReportQuantity) information element in the RRC signaling is "cjtc-P".

13. The method of any one of claims 2-11, wherein, Before the determining the first information, the method further comprises: sending RRC signaling, and a ReportQuantity information element in the RRC signaling is "cjtc-P".

14. A communication method, comprising: The method applied to a first communication device comprises: determining second information; sending the second information to a second communication device. The second information includes third sub-information, and the third sub-information is used to indicate phase offsets of N SB-P first type of subbands on a first bandwidth part (BWP), where N SB-P is a positive integer.

15. A method of communication, comprising: The method applied to a second communication device comprises: receiving second information from a first communication device; processing the second information; The second information includes third sub-information, and the third sub-information is used to indicate phase offsets of N SB-P first-type subbands on the first BWP, where N SB-P is a positive integer.

16. The method of claim 14 or 15, wherein, The N SB-P The starting position of the first type of sub-band on the first BWP It is a fixed value, or the N mentioned above. SB-P The starting position of each first-class sub-band on the first BWP relative to the starting position of the first BWP The deviation is a fixed value; The N SB-P first type of sub-band is corresponding contiguous N SB-P subbands, wherein the is the size of the first type of subband, and The size of the first BWP.

17. The method of claim 14 or 15, wherein, a size of a first first-type subband on the first BWP is: wherein said is the size of the first type of subband, and is a starting position of the first BWP; If a size of a last sub-band on the first BWP is: Alternatively, if a size of a last sub-band on the first BWP is Among them, the is a size of the first type of subband other than the first first type of subband and the last first type of subband on the first BWP.

18. The method of claim 17, wherein, The method further comprises: transmit or receive a bitmap indicating which of the N SB-P first-type subbands on the first BWP are the first-type subbands.

19. The method of claim 14 or 15, wherein, The first type of subband on the first BWP is determined according to a second type of subband on the first BWP, each The second type of subband corresponds to one of the first type of subband, or each The first type of subband corresponds to one of the second type of subband; wherein the The size of the second type of subband, the The size of the first type of subband; wherein the size of the second type of subband The following table was used for determination:

20. The method of claim 19, wherein, The method further comprises: transmit or receive a bitmap, the bitmap being used to indicate the second type of subband corresponding to the N SB-P first type of subband.

21. The method of claim 19 or 20, wherein, The first BWP <73 PRB, the When the first BWP > 1442 PRBs, the 22. The method of claim 14 or 15, wherein, The first type of subband corresponds to 4 physical resource block groups, PRG, with a precoding granularity P' = 2 or 4, the size of the first type of subband being BWP,i = 4 or 8 PRGs, respectively. or 16; or, The first type of subband corresponds to 8 PRGs, where the precoding granularity P' = 2, and the size of the first type of subband is BWP,i = 4. or, The first type of subband corresponds to 4 PRGs.

23. The method of claim 22, wherein, The method further comprises: transmit or receive a bitmap, the bitmap being used to indicate the PRGs corresponding to the N SB-P first type of sub-band.

24. A communications device, characterized by comprising means for performing the method of any one of claims 1, 3-12, or comprising means for performing the method of any one of 2-11, 13, or comprising means for performing the method of any one of claims 14, 16-23, or comprising means for performing the method of any one of claims 15-23.

25. A communications device, characterized by comprising: at least one processor; and a communications interface connected with the at least one processor; The at least one processor, by executing instructions stored in the memory, causes the apparatus to perform the method of any one of claims 1, 3-12 via the communications interface, or causes the apparatus to perform the method of any one of 2-11, 13 via the communications interface, or causes the apparatus to perform the method of any one of claims 14, 16-23 via the communications interface, or causes the apparatus to perform the method of any one of claims 15-23 via the communications interface.

26. The apparatus of claim 25, wherein, The communications apparatus further comprises the memory.

27. A computer readable storage medium, characterized in that, The storage medium has stored therein a computer program or instructions, which, when executed by a communications apparatus, implement the method of any one of claims 1, 3-12, or implement the method of any one of 2-11, 13, or implement the method of any one of claims 14, 16-23, or implement the method of any one of claims 15-23.

28. A computer program product, characterized in that, The computer program product has stored therein instructions, which, when executed on a computer, cause the computer to perform the method of any one of claims 1, 3-12, or cause the computer to perform the method of any one of 2-11, 13, or cause the computer to perform the method of any one of claims 14, 16-23, or cause the computer to perform the method of any one of claims 15-23.

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