Communication methods and apparatuses, and terminal, network device, communication system and medium

Abstract

The present disclosure relates to communication methods and apparatuses, and a terminal, a network device, a communication system and a medium. A communication method comprises: a terminal receiving configuration information sent by a network device, wherein the configuration information is used for configuring Ks CSI-RS resources, Ks being an integer greater than 1; and the terminal sending first information to the network device, wherein the first information comprises CSI-RS resource indication information, the CSI-RS resource indication information is used for indicating Ntot CSI-RS resources selected by the terminal, and the first information further comprises PMIs corresponding to the Ntot CSI-RS resources, Ntot being an integer greater than 1, and Ntot being less than or equal to Ks. In an embodiment of the present disclosure, a terminal selects two or more CSI-RS resources from among Ks CSI-RS resources configured by a network device, and reports indication information of the selected CSI-RS resources and corresponding PMIs to the network device.

Description

Communication method, device, terminal, network equipment, communication system and medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to communication methods, devices, terminals, network equipment, communication systems, and media. Background Art

[0002] In the process of reporting channel status information (CSI), the user equipment (UE) determines at least one of the corresponding indication information such as rank indicator (RI), precoding matrix indicator (PMI), and channel quality indicator (CQI) based on the channel status information reference signal (CSI-RS) resource, and reports it to the network side.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a communication method, apparatus, terminal, network equipment, communication system, and medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal. The method includes:

[0006] Receive configuration information sent by the network device, the configuration information is used to configure K s Channel state information reference signal CSI-RS resources, the K s is an integer greater than 1;

[0007] Sending first information to the network device, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0008] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a network device. The method includes:

[0009] Send configuration information to the terminal, the configuration information is used to configure Ks CSI-RS resources, the K s is an integer greater than 1;

[0010] Receive first information sent by the terminal, the first information including CSI-RS resource indication information, the CSI-RS resource indication information is used to indicate the N selected by the terminal tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0011] According to a third aspect of an embodiment of the present disclosure, a communication device is provided, the device including:

[0012] The transceiver module is used to receive the configuration information sent by the network device, and the configuration information is used to configure the K s CSI-RS resources, the K s An integer greater than 1

[0013] The transceiver module is further configured to send first information to the network device, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0014] According to a fourth aspect of an embodiment of the present disclosure, a communication device is provided, the device including:

[0015] The transceiver module is used to send configuration information to the terminal, and the configuration information is used to configure K s CSI-RS resources, the K s is an integer greater than 1;

[0016] The transceiver module is further configured to receive first information sent by the terminal, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is configured to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the Ntot Less than or equal to the K s .

[0017] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0018] one or more processors;

[0019] The terminal is used to execute the communication method proposed in the first aspect of the embodiment of this disclosure.

[0020] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0021] one or more processors;

[0022] The network device is used to execute the communication method proposed in the second aspect of the embodiment of the present disclosure.

[0023] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the communication method proposed in the first aspect of the embodiment of the present disclosure, and the network device is configured to implement the communication method proposed in the second aspect of the embodiment of the present disclosure.

[0024] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method proposed in the first aspect or the second aspect of the embodiment of the present disclosure.

[0025] In the embodiment of the present disclosure, the network device configures K for the terminal. s CSI-RS resources, the terminal selects two or more CSI-RS resources, and reports indication information of the selected CSI-RS resources and corresponding PMIs to the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0027] FIG1 is a schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0028] FIG2 is an interactive diagram of a communication method provided according to an embodiment of the present disclosure.

[0029] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure.

[0030] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure.

[0031] FIG5 is an interactive diagram of a communication method provided according to an embodiment of the present disclosure.

[0032] FIG6A is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.

[0033] FIG6B is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.

[0034] FIG7A is a schematic structural diagram of a communication device provided according to an embodiment of the present disclosure.

[0035] FIG7B is a schematic structural diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] The embodiments of the present disclosure provide a communication method, apparatus, terminal, network equipment, communication system, and medium.

[0037] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal. The method includes:

[0038] Receive configuration information sent by the network device, the configuration information is used to configure K s Channel state information reference signal CSI-RS resources, the K s is an integer greater than 1;

[0039] Sending first information to the network device, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0040] In the above embodiment, the network device configures K for the terminal. s CSI-RS resources, the terminal selects two or more CSI-RS resources, and reports indication information of the selected CSI-RS resources and corresponding PMIs to the network device.

[0041] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0042] The second information is used to indicate the N totThe same spatial basis vectors of the first dimension and the second dimension corresponding to the CSI-RS resources;

[0043] The third information is used to indicate the N tot The same spatial basis vectors of the first dimension and the second dimension corresponding to the M1 CSI-RS resources in the CSI-RS resources;

[0044] The fourth information is used to indicate the N tot Spatial basis vectors of the first dimension and the second dimension respectively corresponding to the remaining CSI-RS resources except the M1 CSI-RS resources;

[0045] The fifth information is used to indicate the N tot CSI-RS resources have the same spatial basis vectors in the first and second dimensions.

[0046] In the above embodiment, the feedback overhead of the terminal for the spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0048] The sixth information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the CSI-RS resources;

[0049] The seventh information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the M2 CSI-RS resources in the CSI-RS resources;

[0050] The eighth information is used to indicate the N tot Spatial basis vectors of the first dimension corresponding to the remaining CSI-RS resources except the M2 CSI-RS resources;

[0051] The ninth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the first dimension among the CSI-RS resources.

[0052] In the above embodiment, the feedback overhead of the terminal for the spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0054] The tenth information is used to indicate the N tot The same second-dimensional spatial basis vector corresponding to each CSI-RS resource;

[0055] The eleventh information is used to indicate the N tot The same second-dimensional spatial basis vectors corresponding to M3 CSI-RS resources among the CSI-RS resources;

[0056] The twelfth information is used to indicate the N tot Spatial basis vectors of the second dimension corresponding to the remaining CSI-RS resources except the M3 CSI-RS resources in the CSI-RS resources;

[0057] The thirteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the second dimension among the CSI-RS resources.

[0058] In the above embodiment, the feedback overhead of the terminal for the spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0059] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource also includes:

[0060] The fourteenth information is used to indicate the N tot Whether the spatial basis vector of the first dimension corresponding to each of the CSI-RS resources in the CSI-RS resources is the same as the spatial basis vector of the second dimension.

[0061] In the above embodiment, by indicating whether the spatial basis vector of the first dimension corresponding to each CSI-RS resource is the same as the spatial basis vector of the second dimension, the terminal can indicate the spatial basis vectors of the two dimensions through a spatial basis vector of the first dimension and the second dimension when the spatial basis vector of the first dimension corresponding to each CSI-RS resource (or part of the CSI-RS resources) is the same as the spatial basis vector of the second dimension, thereby reducing the feedback overhead of the terminal.

[0062] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0063] The fifteenth information is used to indicate the N tot The same spatial basis vector offset information corresponding to the CSI-RS resources;

[0064] The sixteenth information is used to indicate the N totThe same spatial basis vector offset information corresponding to M4 CSI-RS resources in the CSI-RS resources;

[0065] The seventeenth information is used to indicate the N tot Spatial basis vector offset information corresponding to the remaining CSI-RS resources except the M4 CSI-RS resources in the CSI-RS resources;

[0066] The eighteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector offset information.

[0067] In the above embodiment, the feedback overhead of the terminal for the spatial basis vector offset information can be reduced while ensuring that the system performance remains unchanged.

[0068] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0069] The nineteenth information is used to indicate the N tot The same phase offset information corresponding to the CSI-RS resources includes N g The phase shift between each adjacent panel in the panels;

[0070] The twentieth information is used to indicate the N tot The same phase offset information corresponding to M5 CSI-RS resources in the CSI-RS resources;

[0071] The twenty-first information is used to indicate the N tot The CSI-RS resources have the same phase offset information.

[0072] In the above embodiment, the feedback overhead of the terminal for phase offset information can be reduced while ensuring that the system performance remains unchanged.

[0073] In conjunction with some embodiments of the first aspect, in some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, and the N tot The PMIs corresponding to the CSI-RS resources include:

[0074] The twenty-second information is used to indicate the N tot The same spatial basis vector group corresponding to the CSI-RS resources, wherein the spatial basis vector group is used to select L spatial basis vectors;

[0075] And, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0076] The twenty-third information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to each CSI-RS resource;

[0077] The twenty-fourth information is used to indicate the N based on the spatial basis vector group. tot The same L spatial basis vectors corresponding to the CSI-RS resources;

[0078] The twenty-fifth information is used to indicate the N tot Whether the L spatial basis vectors corresponding to the CSI-RS resources are the same;

[0079] The twenty-sixth information is used to indicate the N based on the spatial basis vector group. tot The same L spatial basis vectors corresponding to the M6 ​​CSI-RS resources in the CSI-RS resources;

[0080] The twenty-seventh information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except the M6 ​​CSI-RS resources in the CSI-RS resources;

[0081] The twenty-eighth information is used to indicate the N based on the spatial basis vector group. tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the N tot The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources respectively, and a value indicating the L';

[0082] The twenty-ninth information is used to indicate the N based on the spatial basis vector group. tot the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the M7 CSI-RS resources among the CSI-RS resources, the remaining L-L' spatial basis vectors respectively corresponding to the M7 CSI-RS resources, and a value indicating the L';

[0083] The 30th information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except the M7 CSI-RS resources in the CSI-RS resources;

[0084] The thirty-first information is used to indicate the N tot The CSI-RS resources correspond to L CSI-RS resources with the same spatial basis vectors.

[0085] In the above embodiment, the feedback overhead of the terminal for the selected L spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0086] In conjunction with some embodiments of the first aspect, in some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, and the N tot The PMIs corresponding to the CSI-RS resources include:

[0087] The thirty-second information is used to indicate the N tot The same spatial basis vector group corresponding to M8 CSI-RS resources in the CSI-RS resources, where the spatial basis vector group is used to select L spatial basis vectors;

[0088] The thirty-third information is used to indicate the N tot The CSI-RS resources corresponding to the same spatial basis vector group in the CSI-RS resources;

[0089] And, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0090] The thirty-fourth information is used to indicate, based on the spatial basis vector group, the L spatial basis vectors corresponding to the M8 CSI-RS resources respectively;

[0091] The thirty-fifth information is used to indicate the same L spatial basis vectors corresponding to the M8 CSI-RS resources based on the spatial basis vector group;

[0092] The thirty-sixth information is used to indicate whether the L spatial basis vectors corresponding to the M8 CSI-RS resources are the same;

[0093] The thirty-seventh information is used to indicate the same L spatial basis vectors corresponding to the M9 CSI-RS resources in the M8 CSI-RS resources based on the spatial basis vector group;

[0094] The thirty-eighth information is used to indicate, based on the spatial basis vector group, L spatial basis vectors corresponding to the remaining CSI-RS resources in the M8 CSI-RS resources except the M9 CSI-RS resources;

[0095] The thirty-ninth information is used to indicate, based on the spatial basis vector group, the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the M8 CSI-RS resources, and the remaining L-L' spatial basis vectors respectively corresponding to the M8 CSI-RS resources, and indicate a value of L';

[0096] The 40th information is used to indicate M of the M8 CSI-RS resources based on the spatial basis vector group. 10 The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the M 10 The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources respectively, and a value indicating the L';

[0097] The forty-first information is used to indicate the M8 CSI-RS resources except the M based on the spatial basis vector group. 10 The remaining CSI-RS resources outside the CSI-RS resources correspond to L spatial basis vectors respectively;

[0098] The forty-second information is used to indicate the CSI-RS resources having the same L spatial basis vectors among the M8 CSI-RS resources;

[0099] The forty-third information is used to indicate the N tot The spatial basis vector groups corresponding to the remaining CSI-RS resources except the M8 CSI-RS resources in the CSI-RS resources are respectively indicated, and the L spatial basis vectors corresponding to the remaining CSI-RS resources are indicated based on the spatial basis vector groups corresponding to the remaining CSI-RS resources.

[0100] In the above embodiment, the feedback overhead of the terminal for the selected L spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0101] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMIs corresponding to the CSI-RS resources include:

[0102] The forty-fourth information is used to indicate the N tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the N tot The remaining L-L' spatial basis vectors respectively correspond to the CSI-RS resources, and indicate the value of L'.

[0103] In the above embodiment, the feedback overhead of the terminal for the selected L spatial basis vectors can be reduced while ensuring that the system performance remains unchanged.

[0104] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0105] The forty-fifth information is used to indicate the N tot The CSI-RS resources correspond to Mv The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the M v 'value;

[0106] The forty-sixth information is used to indicate the N tot M of the CSI-RS resources 11 The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0107] The forty-seventh information is used to indicate the N tot CSI-RS resources except the M 11 The remaining CSI-RS resources outside the CSI-RS resources correspond to M v frequency domain basis vectors;

[0108] The 48th information is used to indicate the starting point of a frequency domain basis vector window;

[0109] The forty-ninth information is used to indicate the N based on the starting point of a frequency domain basis vector window. tot The CSI-RS resources correspond to M v frequency domain basis vectors, and the length of the frequency domain basis vector window is less than the number of subbands N3.

[0110] In the above embodiment, the terminal can reduce the number of selected M bits while ensuring the system performance remains unchanged. v The feedback overhead of frequency domain basis vectors.

[0111] In conjunction with some embodiments of the first aspect, in some embodiments, one CSI-RS resource corresponds to one frequency domain basis vector window;

[0112] The N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0113] The fiftieth information is used to indicate the N tot The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0114] The fifty-first information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The CSI-RS resources correspond to M v frequency domain basis vectors;

[0115] The fifty-second information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The CSI-RS resources correspond to M v The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the M v 'value;

[0116] The fifty-third information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0117] The fifty-fourth information is used to indicate the N tot M of the CSI-RS resources 12 The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0118] The fifty-fifth information is used based on the M 12 The same starting point corresponding to the CSI-RS resources indicates the M 12 The CSI-RS resources correspond to M v frequency domain basis vectors;

[0119] The fifty-sixth information is used to indicate the N tot CSI-RS resources except the M 12 The starting points of the frequency domain basis vector windows corresponding to the remaining CSI-RS resources outside the CSI-RS resources;

[0120] The fifty-seventh information is used to calculate the value of the M 12 The starting point of the frequency domain basis vector window corresponding to the remaining CSI-RS resources outside the CSI-RS resources indicates the M corresponding to the remaining CSI-RS resources. v frequency domain basis vectors;

[0121] The fifty-eighth information is used to indicate the N tot Whether the starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same;

[0122] The fifty-ninth information is used to indicate the N tot The CSI-RS resources correspond to M v Are the frequency domain basis vectors the same?

[0123] In the above embodiment, the terminal can reduce the number of selected M bits while ensuring the system performance remains unchanged. v The feedback overhead of frequency domain basis vectors.

[0124] In conjunction with some embodiments of the first aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0125] The sixtieth information is used to indicate the N tot The same K1' ports among the K1 selected ports corresponding to the CSI-RS resources, and the N tot the remaining selected ports except the K1' ports corresponding to the CSI-RS resources respectively, and an indication of the value of K1';

[0126] The sixty-first information is used to indicate the N tot M of the CSI-RS resources 13 The same K1′ ports among the K1 selected ports corresponding to the CSI-RS resources, and the M 13 the remaining selected ports except the K1' ports corresponding to the CSI-RS resources respectively, and an indication of the value of K1';

[0127] The sixty-second information is used to indicate the N tot CSI-RS resources except the M 13 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively;

[0128] The sixty-third information is used to indicate the N tot M of the CSI-RS resources 14 The same K1 selected ports corresponding to the CSI-RS resources;

[0129] The sixty-fourth information is used to indicate the N tot CSI-RS resources except the M 14 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively.

[0130] In the above embodiment, the feedback overhead of the terminal for the selected K1 ports can be reduced while ensuring that the system performance remains unchanged.

[0131] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device. The method includes:

[0132] Send configuration information to the terminal, the configuration information is used to configure K s CSI-RS resources, the Ks is an integer greater than 1;

[0133] Receive first information sent by the terminal, the first information including CSI-RS resource indication information, the CSI-RS resource indication information is used to indicate the N selected by the terminal tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0134] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0135] The second information is used to indicate the N tot The same spatial basis vectors of the first dimension and the second dimension corresponding to the CSI-RS resources;

[0136] The third information is used to indicate the N tot The same spatial basis vectors of the first dimension and the second dimension corresponding to the M1 CSI-RS resources in the CSI-RS resources;

[0137] The fourth information is used to indicate the N tot Spatial basis vectors of the first dimension and the second dimension respectively corresponding to the remaining CSI-RS resources except the M1 CSI-RS resources;

[0138] The fifth information is used to indicate the N tot CSI-RS resources have the same spatial basis vectors in the first and second dimensions.

[0139] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0140] The sixth information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the CSI-RS resources;

[0141] The seventh information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the M2 CSI-RS resources in the CSI-RS resources;

[0142] The eighth information is used to indicate the N totSpatial basis vectors of the first dimension corresponding to the remaining CSI-RS resources except the M2 CSI-RS resources;

[0143] The ninth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the first dimension among the CSI-RS resources.

[0144] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0145] The tenth information is used to indicate the N tot The same second-dimensional spatial basis vector corresponding to each CSI-RS resource;

[0146] The eleventh information is used to indicate the N tot The same second-dimensional spatial basis vectors corresponding to M3 CSI-RS resources among the CSI-RS resources;

[0147] The twelfth information is used to indicate the N tot Spatial basis vectors of the second dimension corresponding to the remaining CSI-RS resources except the M3 CSI-RS resources in the CSI-RS resources;

[0148] The thirteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the second dimension among the CSI-RS resources.

[0149] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource also includes:

[0150] The fourteenth information is used to indicate the N tot Whether the spatial basis vector of the first dimension corresponding to each of the CSI-RS resources in the CSI-RS resources is the same as the spatial basis vector of the second dimension.

[0151] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0152] The fifteenth information is used to indicate the N tot The same spatial basis vector offset information corresponding to the CSI-RS resources;

[0153] The sixteenth information is used to indicate the N totThe same spatial basis vector offset information corresponding to M4 CSI-RS resources in the CSI-RS resources;

[0154] The seventeenth information is used to indicate the N tot Spatial basis vector offset information corresponding to the remaining CSI-RS resources except the M4 CSI-RS resources in the CSI-RS resources;

[0155] The eighteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector offset information.

[0156] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0157] The nineteenth information is used to indicate the N tot The same phase offset information corresponding to the CSI-RS resources includes N g The phase shift between each adjacent panel in the panels;

[0158] The twentieth information is used to indicate the N tot The same phase offset information corresponding to M5 CSI-RS resources in the CSI-RS resources;

[0159] The twenty-first information is used to indicate the N tot The CSI-RS resources have the same phase offset information.

[0160] In conjunction with some embodiments of the second aspect, in some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, and the N tot The PMIs corresponding to the CSI-RS resources include:

[0161] The twenty-second information is used to indicate the N tot The same spatial basis vector group corresponding to the CSI-RS resources, wherein the spatial basis vector group is used to select L spatial basis vectors;

[0162] And, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0163] The twenty-third information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to each CSI-RS resource;

[0164] The twenty-fourth information is used to indicate the N based on the spatial basis vector group.tot The same L spatial basis vectors corresponding to the CSI-RS resources;

[0165] The twenty-fifth information is used to indicate the N tot Whether the L spatial basis vectors corresponding to the CSI-RS resources are the same;

[0166] The twenty-sixth information is used to indicate the N based on the spatial basis vector group. tot The same L spatial basis vectors corresponding to the M6 ​​CSI-RS resources in the CSI-RS resources;

[0167] The twenty-seventh information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except the M6 ​​CSI-RS resources in the CSI-RS resources;

[0168] The twenty-eighth information is used to indicate the N based on the spatial basis vector group. tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the N tot The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources respectively, and a value indicating the L';

[0169] The twenty-ninth information is used to indicate the N based on the spatial basis vector group. tot the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the M7 CSI-RS resources among the CSI-RS resources, the remaining L-L' spatial basis vectors respectively corresponding to the M7 CSI-RS resources, and a value indicating the L';

[0170] The 30th information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except the M7 CSI-RS resources in the CSI-RS resources;

[0171] The thirty-first information is used to indicate the N tot The CSI-RS resources correspond to L CSI-RS resources with the same spatial basis vectors.

[0172] In conjunction with some embodiments of the second aspect, in some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, and the N tot The PMIs corresponding to the CSI-RS resources include:

[0173] The thirty-second information is used to indicate the N totThe same spatial basis vector group corresponding to M8 CSI-RS resources in the CSI-RS resources is used to select L spatial basis vectors;

[0174] The thirty-third information is used to indicate the N tot The CSI-RS resources corresponding to the same spatial basis vector group in the CSI-RS resources;

[0175] And, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0176] The thirty-fourth information is used to indicate, based on the spatial basis vector group, the L spatial basis vectors corresponding to the M8 CSI-RS resources respectively;

[0177] The thirty-fifth information is used to indicate the same L spatial basis vectors corresponding to the M8 CSI-RS resources based on the spatial basis vector group;

[0178] The thirty-sixth information is used to indicate whether the L spatial basis vectors corresponding to the M8 CSI-RS resources are the same;

[0179] The thirty-seventh information is used to indicate the same L spatial basis vectors corresponding to the M9 CSI-RS resources in the M8 CSI-RS resources based on the spatial basis vector group;

[0180] The thirty-eighth information is used to indicate, based on the spatial basis vector group, L spatial basis vectors corresponding to the remaining CSI-RS resources in the M8 CSI-RS resources except the M9 CSI-RS resources;

[0181] The thirty-ninth information is used to indicate, based on the spatial basis vector group, the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the M8 CSI-RS resources, and the remaining L-L' spatial basis vectors respectively corresponding to the M8 CSI-RS resources, and indicate a value of L';

[0182] The 40th information is used to indicate M of the M8 CSI-RS resources based on the spatial basis vector group. 10 The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the M 10 The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources respectively, and a value indicating the L';

[0183] The forty-first information is used to indicate the M8 CSI-RS resources except the M based on the spatial basis vector group. 10The remaining CSI-RS resources outside the CSI-RS resources correspond to L spatial basis vectors respectively;

[0184] The forty-second information is used to indicate the CSI-RS resources having the same L spatial basis vectors among the M8 CSI-RS resources;

[0185] The forty-third information is used to indicate the N tot The spatial basis vector groups corresponding to the remaining CSI-RS resources except the M8 CSI-RS resources in the CSI-RS resources are respectively indicated, and the L spatial basis vectors corresponding to the remaining CSI-RS resources are indicated based on the spatial basis vector groups corresponding to the remaining CSI-RS resources.

[0186] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMIs corresponding to the CSI-RS resources include:

[0187] The forty-fourth information is used to indicate the N tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the N tot The remaining L-L' spatial basis vectors respectively correspond to the CSI-RS resources, and indicate the value of L'.

[0188] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0189] The forty-fifth information is used to indicate the N tot The CSI-RS resources correspond to M v The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the M v 'value;

[0190] The forty-sixth information is used to indicate the N tot M of the CSI-RS resources 11 The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0191] The forty-seventh information is used to indicate the N tot CSI-RS resources except the M 11 The remaining CSI-RS resources outside the CSI-RS resources correspond to Mv frequency domain basis vectors;

[0192] The 48th information is used to indicate the starting point of a frequency domain basis vector window;

[0193] The forty-ninth information is used to indicate the N based on the starting point of a frequency domain basis vector window. tot The CSI-RS resources correspond to M v frequency domain basis vectors, and the length of the frequency domain basis vector window is less than the number of subbands N3.

[0194] In conjunction with some embodiments of the second aspect, in some embodiments, one CSI-RS resource corresponds to one frequency domain basis vector window;

[0195] The N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0196] The fiftieth information is used to indicate the N tot The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0197] The fifty-first information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The CSI-RS resources correspond to M v frequency domain basis vectors;

[0198] The fifty-second information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The CSI-RS resources correspond to M v The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the M v 'value;

[0199] The fifty-third information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates tot The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0200] The fifty-fourth information is used to indicate the N tot M of the CSI-RS resources 12 The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0201] The fifty-fifth information is used based on the M 12 The same starting point corresponding to the CSI-RS resources indicates the M 12 The CSI-RS resources correspond to M v frequency domain basis vectors;

[0202] The fifty-sixth information is used to indicate the N tot CSI-RS resources except the M 12 The starting points of the frequency domain basis vector windows corresponding to the remaining CSI-RS resources outside the CSI-RS resources;

[0203] The fifty-seventh information is used to calculate the value of the M 12 The starting point of the frequency domain basis vector window corresponding to the remaining CSI-RS resources outside the CSI-RS resources indicates the M corresponding to the remaining CSI-RS resources. v frequency domain basis vectors;

[0204] The fifty-eighth information is used to indicate the N tot Whether the starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same;

[0205] The fifty-ninth information is used to indicate the N tot The CSI-RS resources correspond to M v Are the frequency domain basis vectors the same?

[0206] In conjunction with some embodiments of the second aspect, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0207] The sixtieth information is used to indicate the N tot The same K1' ports among the K1 selected ports corresponding to the CSI-RS resources, and the N tot the remaining selected ports except the K1' ports corresponding to the CSI-RS resources respectively, and an indication of the value of K1';

[0208] The sixty-first information is used to indicate the N tot M of the CSI-RS resources 13 The same K1′ ports among the K1 selected ports corresponding to the CSI-RS resources, and the M 13 the remaining selected ports except the K1' ports corresponding to the CSI-RS resources respectively, and an indication of the value of K1';

[0209] The sixty-second information is used to indicate the N totCSI-RS resources except the M 13 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively;

[0210] The sixty-third information is used to indicate the N tot M of the CSI-RS resources 14 The same K1 selected ports corresponding to the CSI-RS resources;

[0211] The sixty-fourth information is used to indicate the N tot CSI-RS resources except the M 14 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively.

[0212] In a third aspect, an embodiment of the present disclosure provides a communication device, comprising:

[0213] The transceiver module is used to receive the configuration information sent by the network device, and the configuration information is used to configure the K s CSI-RS resources, the K s is an integer greater than 1;

[0214] The transceiver module is further configured to send first information to the network device, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N tot is an integer greater than 1, and the N tot Less than or equal to the K s .

[0215] In a fourth aspect, an embodiment of the present disclosure provides a communication device, comprising:

[0216] The transceiver module is used to send configuration information to the terminal, and the configuration information is used to configure K s CSI-RS resources, the K s is an integer greater than 1;

[0217] The transceiver module is further configured to receive first information sent by the terminal, wherein the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is configured to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, the N totis an integer greater than 1, and the N tot Less than or equal to the K s .

[0218] In a fifth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the first aspect and the optional implementation method of the first aspect.

[0219] In a sixth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the network device is used to execute the second aspect and the optional implementation method of the second aspect.

[0220] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

[0221] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect and the optional implementation of the first aspect, or the method described in the second aspect and the optional implementation of the second aspect.

[0222] In the ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the first aspect and the optional implementation of the first aspect, or the method described in the second aspect and the optional implementation of the second aspect.

[0223] In the tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when running on a computer, enables the computer to execute the method described in the first aspect and the optional implementation of the first aspect, or the method described in the second aspect and the optional implementation of the second aspect.

[0224] In an eleventh aspect, an embodiment of the present disclosure provides a chip or chip system. The chip or chip system includes a processing circuit configured to execute the method described in accordance with the first aspect and its optional implementation, or the method described in accordance with the second aspect and its optional implementation.

[0225] It is understandable that the above-mentioned communication devices, terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0226] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0227] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0228] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0229] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0230] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0231] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0232] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0233] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0234] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0235] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0236] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0237] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0238] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0239] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0240] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0241] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0242] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0243] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0244] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0245] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1 , the communication system 100 includes a terminal 101 and a network device 102. In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0246] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0247] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0248] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0249] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0250] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0251] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0252] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0253] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0254] The CSI reporting setting includes the configuration of the following parameters: CSI reporting quantity, codebook configuration, time domain characteristics of CSI feedback, frequency domain granularity of PMI and CQI, etc. The reporting quantity based on CSI-RS resource indicator (CSI-RS Resource Indicator, CRI) may include CRI-RI-PMI-CQI, CRI-RI-layer indicator (Layer Indicator, LI)-PMI-CQI, CRI-RI-CQI, CRI-reference signal received power (Reference Signal Receiver Power, RSRP), etc. If the reporting quantity is configured as CRI-RI-PMI-CQI, it means that CRI, RI, PMI and CQI are fed back together. The network side can configure K s (>1) CSI-RS resources are used for channel measurement, when K s =2, each CSI-RS resource contains a maximum of 16 ports. <K s ≤8, each CSI-RS resource contains a maximum of 8 ports. The UE can The UE reports CRI bits to the network side to indicate the CSI-RS resource selected by the UE. The UE determines the corresponding RI, PMI, CQI and other indication information based on the CSI-RS resource and reports it to the network side.

[0255] For Rel-15 Type I single-panel codebook, the PMI reported by the UE includes the indication information of the selected spatial basis vector, the indication information of the spatial basis vector offset and the phase offset indication information of the wideband / subband. or bits indicating the spatial basis vectors of the selected horizontal dimension, through or bits indicate the selected spatial basis vector of the vertical dimension, and then pass N o bits indicate the spatial basis vector offset information, such as N o =1 or 2. Wherein, N1 is the number of antenna ports in the horizontal dimension, N2 is the number of antenna ports in the vertical dimension, O1 is the oversampling factor of the antenna ports in the horizontal dimension, and O2 is the oversampling factor of the antenna ports in the vertical dimension.

[0256] For two-layer CSI reporting, Table 1 gives the i 1,3 The mapping relationship between the indicated spatial basis vector offset information and the codebook parameters k1 and k2.

[0257] Table 1

[0258] For Rel-15 Type I multi-panel codebook, the PMI reported by the UE includes the indication information of the selected spatial basis vector, the spatial basis vector offset indication information, the phase offset indication information between panels, and the phase offset indication information of the broadband / subband. bits indicating the spatial basis vectors of the selected horizontal dimension, through bits indicate the selected spatial basis vector of the vertical dimension, and then pass N o bits indicate the spatial basis vector offset information, through N p bits indicate the phase offset information between adjacent panels, such as N o =1 or 2, N p =2.

[0259] For Rel-15 Type II and port selection codebooks, the PMI reported by the UE includes L (>1) spatial basis vectors and the combination coefficients of L spatial basis vectors, and is calculated by bits indicate the L spatial basis vectors selected by the UE, where Calculates the number of combinations of selecting Y from X.

[0260] For Rel-16 Type II codebook, the PMI reported by the UE includes L (>1) spatial basis vectors, M v The frequency domain basis vectors and the combination coefficients corresponding to the spatial domain basis vectors and the frequency domain basis vectors are still calculated by the UE. bits indicate the selected L spatial basis vectors. When the number of subbands N3≤19, the UE bits indicating the selected M v frequency domain basis vectors; when the number of subbands N3>19, the UE passes bits indicating the selected M v frequency domain basis vectors.

[0261] For the Type II codebook of Rel-17 port selection, the PMI reported by the UE includes port selection indication information, a frequency domain basis vector offset indication information and the corresponding combination coefficient. bits indicate the CSI-RS port selected by the terminal, through bits indicate the frequency domain basis vector offset information. N is the number of candidate frequency domain basis vectors, K1 is the number of CSI-RS ports selected by the terminal, and P CSI-RS is the total number of CSI-RS ports.

[0262] The codebook parameters L and M corresponding to the above codebooks v , N1, N2, N3, N, K1 and P CSI-RSAt least one of the two can be configured to the terminal by the network side through RRC signaling.

[0263] In the embodiments of the present disclosure, terms such as spatial basis vector, spatial basis vector beam, etc. can be used to replace the description, and terms such as spatial basis vector group, spatial basis vector beam group, etc. can be used to replace the description.

[0264] To further improve system efficiency or enhance coverage, expanding the antenna scale by increasing the number of antenna ports is a key technical approach. In current commercial deployments, the antenna scale can be quadrupled. For example, support for 64 or 128 CSI-RS ports is required to enable channel measurement for these 64 or 128 antenna ports. Considering the trade-off between performance and deployment cost, future standard evolution will continue to utilize hybrid digital and analog beamforming. With a larger number of ports, the number of users connected to the network also increases. Consequently, the network requires terminals to provide more feedback on at least one of the following: CRI, RI, CQI, and PMI. This feedback is used for network-side multi-user scheduling to improve system performance. Each RI / CQI / PMI is calculated based on a separate CSI-RS resource, and the corresponding CSI-RS resource is indicated by the CRI. When the CRI is greater than 1, independently reporting the corresponding PMI for each CSI-RS resource will exponentially increase feedback overhead.

[0265] Existing solutions only feed back one CRI / RI / CQI / PMI. When multiple CRIs / RIs / CQIs / PMIs are fed back, the feedback overhead increases exponentially if each CRI / RI / CQI / PMI is fed back independently. Reducing terminal feedback overhead while maintaining performance remains an unresolved issue.

[0266] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0267] Step S2101: The network device sends configuration information to the terminal.

[0268] In some embodiments, the terminal receives configuration information sent by the network device. The configuration information is used by the network device to configure K for the terminal. s CSI-RS resources, K s is an integer greater than 1, that is, the network device configures two or more CSI-RS resources for the terminal. The terminal starts from the configured K s Select N out of the CSI-RS resources tot CSI-RS resources, where N tot is an integer greater than 1, and N tot Less than or equal to K s .

[0269] Step S2102: The terminal sends first information to the network device.

[0270] In some embodiments, the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, such as the CSI-RS resource indication information includes N tot CRI, each CRI indicates a CSI-RS resource selected by the terminal. The first information also includes the N tot The PMI corresponding to each CSI-RS resource.

[0271] In some embodiments, the name of the first information is not limited, and it may be, for example, "channel state information (CSI)".

[0272] For ease of understanding, the following describes the N tot The information included in the PMI corresponding to each CSI-RS resource is described.

[0273] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0274] The second information is used to indicate the N tot The same spatial basis vectors of the first dimension and the second dimension corresponding to the CSI-RS resources;

[0275] The third information is used to indicate the N tot The same spatial basis vectors of the first dimension and the second dimension corresponding to the M1 CSI-RS resources in the CSI-RS resources;

[0276] The fourth information is used to indicate the N tot Spatial basis vectors of the first dimension and the second dimension corresponding to the remaining CSI-RS resources except the M1 CSI-RS resources in the CSI-RS resources;

[0277] The fifth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vectors in the first and second dimensions.

[0278] In some embodiments, the "spatial basis vectors of the first dimension and the second dimension" may be a single spatial basis vector that corresponds to both the first dimension and the second dimension. For example, the first dimension is the horizontal dimension, and the second dimension is the vertical dimension. In some embodiments, if the spatial basis vector of the first dimension and the spatial basis vector of the second dimension corresponding to a CSI-RS resource are the same, then only one spatial basis vector may be indicated for the CSI-RS resource, and the spatial basis vector may correspond to both the first dimension and the second dimension.

[0279] In some embodiments, the value of the relevant parameter M (such as M1 to M2 in the embodiment of the present disclosure) 14 The value of at least one of the following may be reported by the terminal, or may be configured by the network device, or may be predefined after negotiation between the terminal and the network device.

[0280] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the first and second dimensions corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include second information, and the second information indicates that tot The same first and second dimension spatial basis vectors corresponding to the CSI-RS resources. tot The spatial basis vectors of the first dimension and the second dimension corresponding to each CSI-RS resource in the CSI-RS resources are used to reduce the feedback overhead of the terminal.

[0281] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the first dimension and the second dimension corresponding to the M1 CSI-RS resources in the CSI-RS resources are the same. tot The PMI corresponding to the M1 CSI-RS resources may include third information, and the third information indicates the same spatial basis vectors of the first dimension and the second dimension corresponding to the M1 CSI-RS resources. Thus, it is not necessary to indicate the spatial basis vectors of the first dimension and the second dimension corresponding to each CSI-RS resource in the M1 CSI-RS resources separately, thereby reducing the feedback overhead of the terminal. Optionally, the N tot The PMI corresponding to the N CSI-RS resources may also include fourth information, thereby indicating the spatial basis vectors of the first dimension and the second dimension corresponding to the remaining CSI-RS resources respectively. tot The PMI corresponding to the N CSI-RS resources may also include fifth information, the fifth information indicating the N tot Which CSI-RS resources among the CSI-RS resources correspond to the same spatial basis vectors of the first dimension and the second dimension.

[0282] In some embodiments, the fifth information can be transmitted via a tot or K s bitmap, or through bits to indicate, or by bits to indicate. It means calculating the number of combinations of selecting Y from X. Optionally, if M1 is configured by a network device, the fifth information can be obtained by bits to indicate, or by bits to indicate.

[0283] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0284] The sixth information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the CSI-RS resources;

[0285] The seventh information is used to indicate the N tot The same spatial basis vector of the first dimension corresponding to the M2 CSI-RS resources in the CSI-RS resources;

[0286] The eighth information is used to indicate the N tot Spatial basis vectors of the first dimension corresponding to the remaining CSI-RS resources except the M2 CSI-RS resources;

[0287] The ninth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the first dimension among the CSI-RS resources.

[0288] In some embodiments, if the spatial basis vector of the first dimension corresponding to a CSI-RS resource is different from the spatial basis vector of the second dimension, then for the CSI-RS resource, the spatial basis vector of the first dimension and the spatial basis vector of the second dimension corresponding to it are indicated respectively.

[0289] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the first dimension corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include sixth information, and the sixth information indicates that the N tot The same first-dimensional spatial basis vectors corresponding to the N CSI-RS resources are used. totThe spatial basis vector of the first dimension corresponding to each CSI-RS resource in the CSI-RS resources is used to reduce the feedback overhead of the terminal.

[0290] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the first dimension corresponding to the M2 CSI-RS resources in the CSI-RS resources are the same. tot The PMI corresponding to the M2 CSI-RS resources may include seventh information, and the seventh information indicates the same spatial basis vector of the first dimension corresponding to the M2 CSI-RS resources. Thus, it is not necessary to indicate the spatial basis vector of the first dimension corresponding to each CSI-RS resource in the M2 CSI-RS resources separately, thereby reducing the feedback overhead of the terminal. Optionally, the N tot The PMI corresponding to the N CSI-RS resources may also include eighth information, thereby indicating the spatial basis vectors of the first dimension corresponding to the remaining CSI-RS resources respectively. tot The PMI corresponding to the N CSI-RS resources may also include ninth information indicating that the N tot Which CSI-RS resources among the CSI-RS resources correspond to the same spatial basis vectors of the first dimension.

[0291] In some embodiments, the ninth information may be transmitted via a tot or K s bitmap, or through bits to indicate, or by Optionally, if M2 is configured by the network device, the ninth information can be bits to indicate, or by bits to indicate.

[0292] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0293] The tenth information is used to indicate the N tot The same second-dimensional spatial basis vector corresponding to each CSI-RS resource;

[0294] The eleventh information is used to indicate the N tot The same second-dimensional spatial basis vectors corresponding to M3 CSI-RS resources among the CSI-RS resources;

[0295] The twelfth information is used to indicate the N totSpatial basis vectors of the second dimension corresponding to the remaining CSI-RS resources except the M3 CSI-RS resources;

[0296] The thirteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector in the second dimension among the CSI-RS resources.

[0297] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the second dimension corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the tenth information, which indicates that the N tot The same second-dimensional spatial basis vectors corresponding to the N CSI-RS resources are used. tot The spatial basis vector of the second dimension corresponding to each CSI-RS resource in the CSI-RS resources is used to reduce the feedback overhead of the terminal.

[0298] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vectors of the second dimension corresponding to the M3 CSI-RS resources in the N CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the eleventh information, which indicates the same second-dimensional spatial basis vector corresponding to the M3 CSI-RS resources. Thus, it is not necessary to indicate the second-dimensional spatial basis vector corresponding to each of the M3 CSI-RS resources separately, thereby reducing the feedback overhead of the terminal. Optionally, the N tot The PMI corresponding to the N CSI-RS resources may also include a twelfth information, thereby indicating the spatial basis vectors of the second dimension corresponding to the remaining CSI-RS resources. tot The PMI corresponding to the N CSI-RS resources may also include thirteenth information, which indicates that the N tot Among the CSI-RS resources, the spatial basis vectors of the second dimension corresponding to which CSI-RS resources are the same.

[0299] In some embodiments, the thirteenth information can be transmitted via a tot or K s bitmap, or through bits to indicate, or by Optionally, if M3 is configured by the network device, the thirteenth information can be bits to indicate, or by bits to indicate.

[0300] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource also includes:

[0301] The fourteenth information is used to indicate the N tot Whether the spatial basis vector of the first dimension corresponding to each CSI-RS resource in the CSI-RS resources is the same as the spatial basis vector of the second dimension.

[0302] In some embodiments, the fourteenth information may be indicated by one bit.

[0303] In some embodiments, in the N tot Among the N CSI-RS resources, if the spatial basis vector of the first dimension corresponding to each CSI-RS resource is the same as the spatial basis vector of the second dimension, for the N tot Each of the CSI-RS resources may indicate only one spatial basis vector, and the spatial basis vector corresponds to both the first dimension and the second dimension.

[0304] In some embodiments, in the N tot In the N CSI-RS resources, if the spatial basis vector of the first dimension corresponding to each CSI-RS resource is not the same as the spatial basis vector of the second dimension, for the N tot Each CSI-RS resource in the CSI-RS resources indicates its corresponding first-dimensional spatial basis vector and second-dimensional spatial basis vector.

[0305] In some embodiments, in the N tot Among CSI-RS resources, if the spatial basis vectors of the first dimension corresponding to some CSI-RS resources are the same as the spatial basis vectors of the second dimension, for these CSI-RS resources, only one spatial basis vector may be indicated, and this spatial basis vector corresponds to both the first dimension and the second dimension.

[0306] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0307] The fifteenth information is used to indicate the N tot The same spatial basis vector offset information corresponding to the CSI-RS resources;

[0308] The sixteenth information is used to indicate the N tot The same spatial basis vector offset information corresponding to M4 CSI-RS resources in the CSI-RS resources;

[0309] The seventeenth information is used to indicate the Ntot Spatial basis vector offset information corresponding to the remaining CSI-RS resources except the M4 CSI-RS resources;

[0310] The eighteenth information is used to indicate the N tot The CSI-RS resources have the same spatial basis vector offset information.

[0311] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vector offset information corresponding to each of the N CSI-RS resources is the same. tot The PMI corresponding to the N CSI-RS resources may include the fifteenth information, and the fifteenth information indicates that the N tot The same spatial basis vector offset information corresponding to the N CSI-RS resources is not required to be indicated separately. tot The spatial basis vector offset information corresponding to each CSI-RS resource in the CSI-RS resources is used to reduce the feedback overhead of the terminal.

[0312] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vector offset information corresponding to the M4 CSI-RS resources in the N CSI-RS resources is the same. tot The PMI corresponding to the M4 CSI-RS resources may include the sixteenth information, which indicates the same spatial basis vector offset information corresponding to the M4 CSI-RS resources. Thus, it is not necessary to indicate the spatial basis vector offset information corresponding to each of the M4 CSI-RS resources separately, thereby reducing the feedback overhead of the terminal. Optionally, the N tot The PMI corresponding to the N CSI-RS resources may also include the seventeenth information, thereby indicating the spatial basis vector offset information corresponding to the remaining CSI-RS resources. tot The PMI corresponding to the N CSI-RS resources may also include eighteenth information, the eighteenth information indicating that the N tot The spatial basis vector offset information corresponding to which CSI-RS resources in the CSI-RS resources is the same.

[0313] In some embodiments, the eighteenth information may be transmitted via a tot or K s bitmap, or through bits to indicate, or by Optionally, if M4 is configured by the network device, the eighteenth information can be indicated by bits to indicate, or by bits to indicate.

[0314] In some embodiments, for Rel-15 Type I single-panel codebook, N tot The indication method of the spatial basis vector corresponding to the CSI-RS resource and N tot The method for indicating the spatial basis vector offset information corresponding to each CSI-RS resource may refer to the above embodiment.

[0315] In some embodiments, for Rel-15 Type I multi-panel codebook, N tot The indication method of the spatial basis vector corresponding to the CSI-RS resource and N tot The method for indicating the spatial basis vector offset information corresponding to each CSI-RS resource may refer to the above embodiment.

[0316] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0317] The nineteenth information is used to indicate the N tot The same phase offset information corresponding to the CSI-RS resources includes N g The phase shift between each adjacent panel in the panels;

[0318] The twentieth information is used to indicate the N tot The same phase offset information corresponding to M5 CSI-RS resources in the CSI-RS resources;

[0319] The twenty-first information is used to indicate the N tot The CSI-RS resources have the same phase offset information.

[0320] In some embodiments, the g -1)*N p bits indicate the phase offset information corresponding to a CSI-RS resource, where N g is the number of panels, N p is the number of bits of phase offset information between two panels that are adjacent panels.

[0321] In combination with the above embodiments, in some embodiments, if the N tot The phase offset information corresponding to each of the N CSI-RS resources is the same. tot The PMI corresponding to the N CSI-RS resources may include the nineteenth information, which indicates that the N tot The same phase offset information corresponding to the N CSI-RS resources is not required to be indicated separately.tot The phase offset information corresponding to each CSI-RS resource in the CSI-RS resources is used to reduce the feedback overhead of the terminal.

[0322] In combination with the above embodiments, in some embodiments, if the N tot The phase offset information corresponding to the M5 CSI-RS resources in the N CSI-RS resources is the same. tot The PMI corresponding to the N CSI-RS resources may include the twentieth information, which indicates the same phase offset information corresponding to the M5 CSI-RS resources. Thus, it is not necessary to indicate the phase offset information corresponding to each of the M5 CSI-RS resources separately, thereby reducing the feedback overhead of the terminal. tot The PMI corresponding to the N CSI-RS resources may also include twenty-first information, the twenty-first information indicating that the N tot Which CSI-RS resources among the CSI-RS resources have the same phase offset information.

[0323] In some embodiments, the twenty-first information may be transmitted via a tot or K s bitmap, or through bits to indicate, or by Optionally, if M5 is configured by the network device, the twenty-first information can be indicated by bits to indicate, or by bits to indicate.

[0324] In some embodiments, for Rel-15 Type I multi-panel codebook, N tot The method for indicating the phase offset information between adjacent panels corresponding to CSI-RS resources may refer to the above embodiment.

[0325] In some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, where N tot The PMIs corresponding to the CSI-RS resources include:

[0326] The twenty-second information is used to indicate the N tot The same spatial basis vector group corresponds to each of the CSI-RS resources, and the spatial basis vector group is used to select L spatial basis vectors.

[0327] In some embodiments, the bits indicate a spatial basis vector group.

[0328] In combination with the above embodiments, in some embodiments, if the Ntot The spatial basis vector groups corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the twenty-second information, and the twenty-second information indicates that the N tot The same spatial basis vector group corresponding to the N CSI-RS resources. tot The spatial basis vector group corresponding to each CSI-RS resource in the CSI-RS resources is used to reduce the feedback overhead of the terminal.

[0329] For one CSI-RS resource, it is also necessary to instruct the terminal to select L spatial basis vectors from the N1N2 spatial basis vectors in the corresponding spatial basis vector group. Therefore, for N tot CSI-RS resources, need to indicate N tot Each CSI-RS resource in the CSI-RS resources corresponds to the selected L spatial basis vectors.

[0330] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0331] The twenty-third information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to each CSI-RS resource;

[0332] The twenty-fourth information is used to indicate the N based on the spatial basis vector group. tot The same L spatial basis vectors corresponding to the CSI-RS resources;

[0333] The twenty-fifth information is used to indicate the N tot Whether the L spatial basis vectors corresponding to the CSI-RS resources are the same;

[0334] The twenty-sixth information is used to indicate the N based on the spatial basis vector group. tot The same L spatial basis vectors corresponding to the M6 ​​CSI-RS resources in the CSI-RS resources;

[0335] The twenty-seventh information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except the M6 ​​CSI-RS resources in the CSI-RS resources;

[0336] The twenty-eighth information is used to indicate the N based on the spatial basis vector group. tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the N totThe remaining L-L' spatial basis vectors corresponding to the CSI-RS resources, and the value indicating L';

[0337] The twenty-ninth information is used to indicate the N based on the spatial basis vector group. tot the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the M7 CSI-RS resources in the CSI-RS resources, the remaining L-L' spatial basis vectors respectively corresponding to the M7 CSI-RS resources, and a value indicating L';

[0338] The 30th information is used to indicate the N based on the spatial basis vector group. tot L spatial basis vectors corresponding to the remaining CSI-RS resources except M7 CSI-RS resources in the CSI-RS resources;

[0339] The thirty-first information is used to indicate the N tot The L CSI-RS resources corresponding to the L CSI-RS resources have the same spatial basis vectors.

[0340] In combination with the above embodiments, in some embodiments, the N tot The PMI corresponding to each CSI-RS resource may include the twenty-third information, thereby indicating the N tot Each CSI-RS resource in the CSI-RS resources corresponds to L spatial basis vectors.

[0341] In some embodiments, the bits indicate the L spatial basis vectors corresponding to one CSI-RS resource.

[0342] In combination with the above embodiments, in some embodiments, if the N tot The L spatial basis vectors corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the twenty-fourth information, which indicates that the N tot The same L spatial basis vectors corresponding to the CSI-RS resources are not required to be indicated separately. tot Each CSI-RS resource in the N CSI-RS resources corresponds to L spatial basis vectors, reducing the feedback overhead of the terminal. It should be noted that “the N tot The L spatial basis vectors corresponding to the CSI-RS resources are the same", which can be described as: tot The L spatial basis vectors corresponding to any CSI-RS resource in the N CSI-RS resources are tot The L spatial basis vectors corresponding to the other CSI-RS resources in the CSI-RS resources are the same. totThe PMI corresponding to the N CSI-RS resources may also include the twenty-fifth information, which indicates that the N tot Whether the L spatial basis vectors corresponding to the CSI-RS resources are the same.

[0343] In some embodiments, the bits indicate the same L spatial basis vectors.

[0344] In some embodiments, N may be indicated by one bit. tot Whether the L spatial basis vectors corresponding to the CSI-RS resources are the same.

[0345] In combination with the above embodiments, in some embodiments, if the N tot The L spatial basis vectors corresponding to the M6 ​​CSI-RS resources in the CSI-RS resources are the same. tot The PMI corresponding to the M6 ​​CSI-RS resources may include the twenty-sixth information, which indicates the same L spatial basis vectors corresponding to the M6 ​​CSI-RS resources, thereby reducing the feedback overhead of the terminal. It should be noted that "the L spatial basis vectors corresponding to the M6 ​​CSI-RS resources are the same", which can be described as the L spatial basis vectors corresponding to any one of the M6 ​​CSI-RS resources are the same as the L spatial basis vectors corresponding to the other CSI-RS resources in the M6 ​​CSI-RS resources. Optionally, the N tot The PMI corresponding to the N CSI-RS resources may also include the twenty-seventh information, thereby indicating the L spatial basis vectors corresponding to the remaining CSI-RS resources respectively. tot The PMI corresponding to the N CSI-RS resources may also include thirty-first information, the thirty-first information indicating that the N tot Which CSI-RS resources among the CSI-RS resources correspond to the same L spatial basis vectors.

[0346] In combination with the above embodiments, in some embodiments, if the N tot The L' spatial basis vectors of the L spatial basis vectors corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the twenty-eighth information, which indicates that the N tot The same L' spatial basis vectors corresponding to the CSI-RS resources, and the value indicating L', and respectively indicating the N tot Each CSI-RS resource in the N CSI-RS resources corresponds to the remaining L-L' spatial basis vectors, thereby reducing the feedback overhead of the terminal. It should be noted that "the N totThe L' spatial basis vectors of the L spatial basis vectors corresponding to the CSI-RS resources are the same", which can be described as: tot The L' spatial basis vectors of the L spatial basis vectors corresponding to any CSI-RS resource in the N CSI-RS resources are the same as the L' spatial basis vectors of the N tot The L′ spatial basis vectors among the L spatial basis vectors corresponding to the other CSI-RS resources in the CSI-RS resources are the same.

[0347] In some embodiments, the bits indicate the same L' spatial basis vectors.

[0348] In some embodiments, the bits indicate the value of L'.

[0349] In some embodiments, the bits indicate the remaining L-L' spatial basis vectors corresponding to one CSI-RS resource.

[0350] In combination with the above embodiments, in some embodiments, if the N tot The M7 CSI-RS resources in the CSI-RS resources correspond to the same L' spatial basis vectors in the L spatial basis vectors. tot The PMI corresponding to the M7 CSI-RS resources may include twenty-ninth information, the twenty-ninth information indicating the same L' spatial basis vectors corresponding to the M7 CSI-RS resources, and indicating the value of L', and respectively indicating the remaining L-L' spatial basis vectors corresponding to each CSI-RS resource in the M7 CSI-RS resources, thereby reducing the feedback overhead of the terminal. It should be noted that "the L' spatial basis vectors of the L spatial basis vectors corresponding to the M7 CSI-RS resources are the same", which can be described as that the L' spatial basis vectors of the L spatial basis vectors corresponding to any one of the M7 CSI-RS resources are the same as the L' spatial basis vectors of the L spatial basis vectors corresponding to other CSI-RS resources in the M7 CSI-RS resources. Optionally, the N tot The PMI corresponding to the CSI-RS resource may further include thirtieth information, thereby indicating the L spatial basis vectors corresponding to the remaining CSI-RS resources respectively.

[0351] In some embodiments, one CSI-RS resource corresponds to one spatial basis vector group, where N tot The PMIs corresponding to the CSI-RS resources include:

[0352] The thirty-second information is used to indicate the N totThe same spatial basis vector group corresponding to M8 CSI-RS resources in the CSI-RS resources;

[0353] The thirty-third information is used to indicate the N tot The CSI-RS resources corresponding to the spatial basis vector group are the same.

[0354] In combination with the above embodiments, in some embodiments, if the N tot The spatial basis vector groups corresponding to the M8 CSI-RS resources in the N CSI-RS resources are the same. tot The PMI corresponding to the M8 CSI-RS resources may include thirty-second information and thirty-third information, wherein the thirty-second information indicates the same spatial basis vector group corresponding to the M8 CSI-RS resources, and the thirty-third information indicates the N tot The spatial basis vector groups corresponding to which CSI-RS resources in the M8 CSI-RS resources are the same. Therefore, it is not necessary to separately indicate the spatial basis vector group corresponding to each CSI-RS resource in the M8 CSI-RS resources, thereby reducing the feedback overhead of the terminal.

[0355] For the M8 CSI-RS resources, it is also necessary to indicate the selected L spatial basis vectors corresponding to each CSI-RS resource in the M8 CSI-RS resources.

[0356] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource also includes at least one of the following:

[0357] The thirty-fourth information is used to indicate, based on the spatial basis vector group, the L spatial basis vectors corresponding to the M8 CSI-RS resources respectively;

[0358] The thirty-fifth information is used to indicate the same L spatial basis vectors corresponding to the M8 CSI-RS resources based on the spatial basis vector group;

[0359] The thirty-sixth information is used to indicate whether the L spatial basis vectors corresponding to the M8 CSI-RS resources are the same;

[0360] The thirty-seventh information is used to indicate, based on the spatial basis vector group, the same L spatial basis vectors corresponding to the M9 CSI-RS resources among the M8 CSI-RS resources;

[0361] The thirty-eighth information is used to indicate, based on the spatial basis vector group, L spatial basis vectors corresponding to the remaining CSI-RS resources except the M9 CSI-RS resources in the M8 CSI-RS resources;

[0362] The thirty-ninth information is used to indicate, based on the spatial basis vector group, the same L' spatial basis vectors among the L spatial basis vectors corresponding to the M8 CSI-RS resources, and the remaining L-L' spatial basis vectors corresponding to the M8 CSI-RS resources, and a value of L';

[0363] The 40th information is used to indicate M of the M8 CSI-RS resources based on the spatial basis vector group. 10 The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the M 10 The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources, and the value indicating L';

[0364] The forty-first information is used to indicate the number of the M8 CSI-RS resources except M based on the spatial basis vector group. 10 The remaining CSI-RS resources outside the CSI-RS resources correspond to L spatial basis vectors respectively;

[0365] The forty-second information is used to indicate the CSI-RS resources with the same L spatial basis vectors among the M8 CSI-RS resources;

[0366] The forty-third information is used to indicate the N tot The spatial basis vector groups corresponding to the remaining CSI-RS resources except the M8 CSI-RS resources in the CSI-RS resources are respectively indicated, and the spatial basis vector groups corresponding to the remaining CSI-RS resources are indicated based on the L spatial basis vectors corresponding to the remaining CSI-RS resources.

[0367] It should be noted that the indication method of the selected L spatial basis vectors corresponding to the M8 CSI-RS resources can refer to the thirty-fourth to forty-second information, and its optional implementation method can refer to the N in the above embodiment. tot The method of indicating the selected L spatial basis vectors corresponding to the CSI-RS resources will not be described in detail here.

[0368] In combination with the above embodiments, in some embodiments, the N tot The PMI corresponding to the CSI-RS resources includes the forty-third information, thereby indicating the L spatial basis vectors corresponding to the remaining CSI-RS resources respectively.

[0369] In some embodiments, the N tot The PMIs corresponding to the CSI-RS resources include:

[0370] The forty-fourth information is used to indicate the N tot The same L' spatial basis vectors among the L spatial basis vectors corresponding to the CSI-RS resources, and the Ntot The remaining L-L' spatial basis vectors corresponding to the CSI-RS resources respectively, and the value indicating L'.

[0371] In combination with the above embodiment, in some embodiments, the terminal selects L spatial basis vectors from O1O2N1N2 candidate spatial basis vectors. tot The L' spatial basis vectors of the L spatial basis vectors corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the forty-fourth information, which indicates that the N tot The same L' spatial basis vectors corresponding to the CSI-RS resources, and the value indicating L', and respectively indicating the N tot The remaining L-L' spatial basis vectors corresponding to each CSI-RS resource in the CSI-RS resources.

[0372] In some embodiments, the bits indicate the same L' spatial basis vectors.

[0373] In some embodiments, the bits indicate the remaining L-L' spatial basis vectors corresponding to one CSI-RS resource.

[0374] In some embodiments, for Rel-15 Type II codebook, N tot The method for indicating the selected L spatial basis vectors corresponding to the CSI-RS resources may refer to the above embodiment.

[0375] In some embodiments, for Rel-16 Type II codebook, N tot The method for indicating the selected L spatial basis vectors corresponding to the CSI-RS resources may refer to the above embodiment.

[0376] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0377] The forty-fifth information is used to indicate the N tot The CSI-RS resources correspond to M v The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the indication M v 'value;

[0378] The forty-sixth information is used to indicate the Ntot M of the CSI-RS resources 11 The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0379] The forty-seventh information is used to indicate the N tot CSI-RS resources except M 11 The remaining CSI-RS resources outside the CSI-RS resources correspond to M v frequency domain basis vectors;

[0380] The 48th information is used to indicate the starting point of a frequency domain basis vector window;

[0381] The forty-ninth information is used to indicate the N based on the starting point of a frequency domain basis vector window. tot The CSI-RS resources correspond to M v frequency domain basis vectors, and the length of the frequency domain basis vector window is less than the number of subbands N3.

[0382] In combination with the above embodiments, in some embodiments, if the N tot The CSI-RS resources correspond to M v M of the frequency domain basis vectors v 'The frequency domain basis vectors are the same, the N tot The PMI corresponding to the N CSI-RS resources may include the forty-fifth information, which indicates that the N tot The same M corresponding to the CSI-RS resources v ' frequency domain basis vectors, and the indicator M v ', and respectively indicate the N tot The remaining frequency domain basis vectors corresponding to each CSI-RS resource in the CSI-RS resources are used to reduce the feedback overhead of the terminal. Since one frequency domain basis vector is always selected, it is possible to indicate only the remaining M v -M v '-1 frequency domain basis vector. It should be noted that "the N tot The CSI-RS resources correspond to M v M of the frequency domain basis vectors v 'The frequency domain basis vectors are the same", which can be described as, the N tot M corresponding to any CSI-RS resource in the CSI-RS resources v M of the frequency domain basis vectors v 'Frequency domain basis vectors and the N tot The M corresponding to other CSI-RS resources in the CSI-RS resources v M of the frequency domain basis vectors v 'The frequency domain basis vectors are the same.

[0383] In some embodiments, the bits indicate the same M v 'Frequency domain basis vectors.

[0384] In some embodiments, the bits indicating M v ' value.

[0385] In some embodiments, the bits indicate the remaining M corresponding to a CSI-RS resource v -M v '-1 frequency domain basis vectors.

[0386] In combination with the above embodiments, in some embodiments, if the N tot M of the CSI-RS resources 11 M corresponding to the CSI-RS resources v The frequency domain basis vectors are the same, the N tot The PMI corresponding to the CSI-RS resource may include the forty-sixth information, and the forty-sixth information indicates that the M 11 The same M corresponding to the CSI-RS resources v Frequency domain basis vectors are selected to reduce the feedback overhead of the terminal. Since one frequency domain basis vector is always selected, it is possible to indicate only M v -1 frequency domain basis vector. It should be noted that “M 11 M corresponding to the CSI-RS resources v The frequency domain basis vectors are the same", which can be described as, 11 M corresponding to any CSI-RS resource in the CSI-RS resources v The frequency domain basis vectors and the M 11 The M corresponding to other CSI-RS resources in the CSI-RS resources v The frequency domain basis vectors are the same. Optionally, the N tot The PMI corresponding to the CSI-RS resources may also include forty-seventh information, which indicates the remaining N tot -M 11 The CSI-RS resources correspond to M v frequency domain basis vectors.

[0387] In some embodiments, the bits indicate the M corresponding to a CSI-RS resource v frequency domain basis vectors.

[0388] In combination with the above embodiments, in some embodiments, a frequency domain basis vector window with a length (size) of W may be predefined or indicated, where W < N3. The length of the frequency domain basis vector window may be reported by the terminal, or may be configured by the network device, or may be predefined after negotiation between the terminal and the network device. tot The PMI corresponding to a CSI-RS resource may include forty-eighth information, and the forty-eighth information indicates a starting point of a frequency domain basis vector window.

[0389] In some embodiments, the bits indicate the starting point of a frequency domain basis vector window. In some embodiments, the starting point of the frequency domain basis vector window can be determined according to a predefined method.

[0390] In combination with the above embodiments, in some embodiments, the N tot The PMI corresponding to the N CSI-RS resources may include the forty-ninth information, which indicates the N based on the starting point of a frequency domain basis vector window. tot The CSI-RS resources correspond to M v frequency domain basis vectors, thus completing the N tot The M corresponding to each CSI-RS resource v The frequency domain basis vector is indicated to reduce the feedback overhead of the terminal.

[0391] In some embodiments, by bits indicate the M corresponding to a CSI-RS resource v frequency domain basis vectors.

[0392] In some embodiments, for the Rel-16 Type II codebook, when N3≤19, N tot The method for indicating the frequency domain basis vectors corresponding to the CSI-RS resources may refer to the above embodiment.

[0393] In some embodiments, one CSI-RS resource corresponds to one frequency domain basis vector window. tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0394] The 50th information is used to indicate the N tot The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0395] The fifty-first information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates that tot The CSI-RS resources correspond to M v frequency domain basis vectors;

[0396] The fifty-second information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates that tot The CSI-RS resources correspond to M v The same M in the frequency domain basis vectors v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the indication M v 'value;

[0397] The fifty-third information is used based on the N tot The same starting point corresponding to the N CSI-RS resources indicates that tot The same M corresponding to the CSI-RS resources v frequency domain basis vectors;

[0398] The fifty-fourth information is used to indicate the N tot M of the CSI-RS resources 12 The starting point of the same frequency domain basis vector window corresponding to each CSI-RS resource;

[0399] The fifty-fifth information is used based on the M 12 The same starting point corresponding to the CSI-RS resources indicates that the M 12 The CSI-RS resources correspond to M v frequency domain basis vectors;

[0400] The fifty-sixth information is used to indicate the N tot CSI-RS resources except the M 12 The starting points of the frequency domain basis vector windows corresponding to the remaining CSI-RS resources outside the CSI-RS resources;

[0401] The fifty-seventh information is used to 12 The starting point of the frequency domain basis vector window corresponding to the remaining CSI-RS resources outside the CSI-RS resources indicates the M corresponding to the remaining CSI-RS resources. v frequency domain basis vectors;

[0402] The fifty-eighth information is used to indicate the N tot Whether the starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same;

[0403] The fifty-ninth information is used to indicate the N tot The CSI-RS resources correspond to M v Are the frequency domain basis vectors the same?

[0404] In some embodiments, each CSI-RS resource corresponds to a frequency domain basis vector window. The length of the frequency domain basis vector window may be indicated by a terminal report, or may be configured by a network device, or may be predefined after negotiation between the terminal and the network device. For ease of description, the length of each frequency domain basis vector window is represented by W. In some embodiments, W may be the same as the number of selected frequency domain basis vectors M. v Linear correlation, for example, W = k*M v The coefficient k can be reported by the terminal, or can be configured by the network device, or can be predefined after negotiation between the terminal and the network device. v .

[0405] In combination with the above embodiments, in some embodiments, if the N tot The starting points of the frequency domain basis vector windows corresponding to the N CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include fiftieth information, and the fiftieth information indicates that the N tot The CSI-RS resources correspond to the same starting point, thereby reducing the feedback overhead of the terminal.

[0406] In some embodiments, the bits indicate a same starting point. In some embodiments, a same starting point can be determined according to a predefined method.

[0407] In combination with the above embodiments, in some embodiments, if the N tot The starting points of the frequency domain basis vector windows corresponding to the N CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include the fifty-first information, which is based on the N tot The same starting point corresponding to the N CSI-RS resources indicates the tot Each CSI-RS resource in the CSI-RS resources corresponds to M v frequency domain basis vectors.

[0408] In combination with the above embodiments, in some embodiments, if the N tot The starting points of the frequency domain basis vector windows corresponding to the N CSI-RS resources are the same, and the N tot The CSI-RS resources correspond to M v M of the frequency domain basis vectors v 'The frequency domain basis vectors are the same, the N tot The PMI corresponding to the N CSI-RS resources may include fifty-second information, and the fifty-second information is based on the N totThe same starting point corresponding to the N CSI-RS resources indicates that tot The same M corresponding to the CSI-RS resources v 'frequency domain basis vectors, and the N tot The CSI-RS resources correspond to the M v 'The remaining frequency domain basis vectors outside the frequency domain basis vectors, and the indication M v ' value, thereby reducing the feedback overhead of the terminal. Since one frequency domain basis vector is always selected, it is possible to indicate only the remaining M v -M v '-1 frequency domain basis vectors.

[0409] In some embodiments, the bits indicate the same M v 'Frequency domain basis vectors.

[0410] In some embodiments, the bits indicating M v ' value.

[0411] In some embodiments, the bits indicate the remaining M corresponding to a CSI-RS resource v -M v '-1 frequency domain basis vectors.

[0412] In combination with the above embodiments, in some embodiments, if the N tot The starting points of the frequency domain basis vector windows corresponding to the N CSI-RS resources are the same, and the N tot The CSI-RS resources correspond to M v The frequency domain basis vectors are the same, the N tot The PMI corresponding to the N CSI-RS resources may include fifty-third information, and the fifty-third information is based on the N tot The same starting point corresponding to the N CSI-RS resources indicates that tot The same M corresponding to the CSI-RS resources v frequency domain basis vectors, thereby reducing the feedback overhead of the terminal. It should be noted that “the N tot The CSI-RS resources correspond to M v The frequency domain basis vectors are the same", which can be described as, tot M corresponding to any CSI-RS resource in the CSI-RS resources v The frequency domain basis vectors and the N tot The M corresponding to other CSI-RS resources in the CSI-RS resources v The frequency domain basis vectors are the same.

[0413] In combination with the above embodiments, in some embodiments, if the N tot M of the CSI-RS resources 12 The starting points of the frequency domain basis vector windows corresponding to the N CSI-RS resources are the same. tot The PMI corresponding to each CSI-RS resource may include the fifty-fourth information, which indicates that the M 12 The CSI-RS resources correspond to the same starting point.

[0414] In some embodiments, if the M 12 The starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same. 12 The CSI-RS resources correspond to M v The method for indicating the frequency domain basis vectors can refer to the N tot The CSI-RS resources correspond to M v The method of indicating the frequency domain basis vectors will not be repeated here.

[0415] In some embodiments, for the remaining N tot -M 12 CSI-RS resources, the N tot The PMI corresponding to each CSI-RS resource may include fifty-sixth information and fifty-seventh information, wherein the fifty-sixth information indicates the starting point of the frequency domain basis vector window corresponding to the remaining CSI-RS resources, and the fifty-seventh information indicates the PMI corresponding to the remaining CSI-RS resources based on the starting point of the frequency domain basis vector window corresponding to the remaining CSI-RS resources. v In some embodiments, the fifty-sixth information is optional information, for example, the starting point of the frequency domain basis vector window corresponding to each remaining CSI-RS resource is determined according to a predefined method.

[0416] In combination with the above embodiments, in some embodiments, the N tot The PMI corresponding to the N CSI-RS resources may include the fifty-eighth information, and the fifty-eighth information indicates that the N tot The starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same. If they are different, the starting point of the frequency domain basis vector window corresponding to each CSI-RS resource is indicated separately.

[0417] In combination with the above embodiments, in some embodiments, the N tot The PMI corresponding to the N CSI-RS resources may include fifty-ninth information, and the fifty-ninth information indicates that the N tot The CSI-RS resources correspond to M vAre the frequency domain basis vectors the same? If different, the N frequency domain basis vectors can be determined by referring to the 50th to 52nd information and the 54th to 57th information. tot The CSI-RS resources correspond to M v frequency domain basis vectors to indicate.

[0418] In some embodiments, for Rel-16 Type II codebook, when N3>19, N tot The method for indicating the frequency domain basis vectors corresponding to the CSI-RS resources may refer to the above embodiment.

[0419] In some embodiments, the N tot The PMI corresponding to each CSI-RS resource includes at least one of the following:

[0420] The sixtieth information is used to indicate the N tot The same K1' ports among the K1 selected ports corresponding to the CSI-RS resources, and the N tot The remaining selected ports except the K1' ports corresponding to the CSI-RS resources, and the value indicating K1';

[0421] The sixty-first information is used to indicate the N tot M of the CSI-RS resources 13 The same K1′ ports among the K1 selected ports corresponding to the CSI-RS resources and the M 13 The remaining selected ports except K1' ports corresponding to the CSI-RS resources, and the value indicating K1';

[0422] The sixty-second information is used to indicate the N tot CSI-RS resources except the M 13 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively;

[0423] The sixty-third information is used to indicate the N tot M of the CSI-RS resources 14 The same K1 selected ports corresponding to the CSI-RS resources;

[0424] The sixty-fourth message is used to indicate N tot CSI-RS resources except the M 14 The remaining CSI-RS resources outside the CSI-RS resources correspond to K1 selected ports respectively.

[0425] In some embodiments, the K1' ports are ports corresponding to one polarization direction.

[0426] In combination with the above embodiments, in some embodiments, if the N tot The K1' ports among the K1 selected ports corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the N CSI-RS resources may include sixty information, and the sixtieth information indicates that the N tot The same K1' ports corresponding to the CSI-RS resources. It should be noted that "the N tot The K1' ports of the K1 selected ports corresponding to the CSI-RS resources are the same", which can be described as: tot K1' ports among the K1 selected ports corresponding to any CSI-RS resource in the N CSI-RS resources are connected to the tot The K1′ ports among the K1 selected ports corresponding to the other CSI-RS resources in the CSI-RS resources are the same.

[0427] In some embodiments, the bits indicate the same K1' ports.

[0428] In some embodiments, the Indicates the value of K1'. The total number of ports selected in one polarization direction.

[0429] In some embodiments, the bits indicate the remaining selected ports.

[0430] In combination with the above embodiments, in some embodiments, if the N tot M of the CSI-RS resources 13 The K1' ports among the K1 selected ports corresponding to the CSI-RS resources are the same. tot The PMI corresponding to the CSI-RS resource may include the sixty-first information, and the sixtieth information indicates that the M 13 The same K1' ports corresponding to the CSI-RS resources. tot The PMI corresponding to each CSI-RS resource may further include sixty-second information, where the sixty-second information respectively indicates the K1 selected ports corresponding to each of the remaining CSI-RS resources.

[0431] In combination with the above embodiments, in some embodiments, if the N tot M of the CSI-RS resources 14 The K1 selected ports corresponding to the CSI-RS resources are the same. totThe PMI corresponding to the CSI-RS resource may include the sixty-third information, which indicates that the M 14 The same K1 selected ports corresponding to the CSI-RS resources. tot The PMI corresponding to each CSI-RS resource may further include sixty-fourth information, where the sixty-fourth information respectively indicates the K1 selected ports corresponding to each of the remaining CSI-RS resources.

[0432] In some embodiments, the bits indicate K1 selected ports corresponding to one CSI-RS resource.

[0433] In some embodiments, the Type II codebook is selected for the Rel-17 port, N tot The method for indicating port selection corresponding to each CSI-RS resource may refer to the above embodiment.

[0434] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0435] In some embodiments, the terms "codebook," "codeword," and "precoding matrix" may be used interchangeably. For example, a codebook may be a collection of one or more codewords / precoding matrices.

[0436] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0437] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0438] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0439] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0440] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3 , the embodiment of the present disclosure relates to a communication method, which is applied to a terminal. The method includes:

[0441] Step S3101: Receive configuration information sent by a network device.

[0442] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0443] In some embodiments, the configuration information is used to configure K s CSI-RS resources, K s is an integer greater than 1. The terminal is configured from K s Select N out of the CSI-RS resources tot CSI-RS resources.

[0444] Step S3102: Send first information to the network device.

[0445] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0446] In some embodiments, the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resource, N tot is an integer greater than 1, and N tot Less than or equal to K s .

[0447] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 , the embodiment of the present disclosure relates to a communication method applied to a network device, and the method includes:

[0448] Step S4101: Send configuration information to the terminal.

[0449] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0450] In some embodiments, the configuration information is used to configure K s CSI-RS resources, K s is an integer greater than 1. The terminal is configured from K s Select N out of the CSI-RS resources tot CSI-RS resources.

[0451] Step S4102: Receive the first information sent by the terminal.

[0452] The optional implementation of step S4102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0453] In some embodiments, the first information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resource, N tot is an integer greater than 1, and N tot Less than or equal to K s .

[0454] Figure 5 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the embodiment of the present disclosure relates to a communication method, which includes:

[0455] Step S5101: The network device sends configuration information to the terminal.

[0456] The network device configures K for the terminal through configuration information s CSI-RS resources.

[0457] Step S5102: The terminal sends N to the network device. tot CRI and N tot The PMI corresponding to each CSI-RS resource.

[0458] The following are combined with Rel-15 Type I single-panel codebook, Rel-15 Type I multi-panel codebook, Rel-15 Type II codebook, Rel-16 Type II codebook, and Rel-17 port selection Type II codebook to report N in the above step S5102. tot An optional embodiment of a PMI corresponding to a CSI-RS resource is described below.

[0459] (1) Rel-15 Type I single-panel codebook

[0460] N tot The indication method of the spatial basis vector corresponding to each CSI-RS resource is as follows:

[0461] Option 1: All reported N tot CSI-RS resources or parts M (M<N tot ) CSI-RS resources correspond to the same horizontal and vertical spatial basis vector indication information. The horizontal and vertical spatial basis vector indication information indicates a horizontal and vertical spatial basis vector. If M CSI-RS resources correspond to the same horizontal and vertical spatial basis vector indication information, the horizontal and vertical spatial basis vector indication information corresponding to the remaining CSI-RS resources are reported separately. When M CSI-RS resources correspond to the same horizontal and vertical spatial basis vector indication information, the terminal also reports an additional indication information to indicate which part of the CSI-RS resources corresponds to the same horizontal and vertical spatial basis vector indication information. The size of the additional indication information can be obtained by a size of N tot or K s bits of bitmap indication, or through bits, or by Optionally, if M is a network-side configuration, the size of the additional indication information can be or bits indicate.

[0462] Option 2: All reported N tot CSI-RS resources or parts M (<N tot) CSI-RS resources correspond to the same horizontal-dimensional spatial basis vector indication information and / or the same vertical-dimensional spatial basis vector indication information. The horizontal-dimensional spatial basis vector indication information indicates a horizontal-dimensional spatial basis vector, and the vertical-dimensional spatial basis vector indication information indicates a vertical-dimensional spatial basis vector. If M CSI-RS resources correspond to the same horizontal-dimensional spatial basis vector indication information, the horizontal-dimensional spatial basis vector indication information corresponding to the remaining CSI-RS resources is reported separately. Similarly, if M CSI-RS resources correspond to the same vertical-dimensional spatial basis vector indication information, the vertical-dimensional spatial basis vector indication information corresponding to the remaining CSI-RS resources is reported separately. When M CSI-RS resources correspond to the same horizontal-dimensional spatial basis vector indication information and / or vertical-dimensional spatial basis vector indication information, the terminal also reports an additional indication information to indicate which part of the CSI-RS resources corresponds to the same horizontal-dimensional spatial basis vector indication information and / or vertical-dimensional spatial basis vector indication information. The size of the additional indication information is the same as Option 1.

[0463] Option 3: The terminal reports an additional bit to indicate N tot Whether the horizontal spatial basis vector and vertical spatial basis vector corresponding to each CSI-RS resource in the CSI-RS resources are the same, if they are the same, use the method described in Option 1 to indicate; if they are not the same, indicate the horizontal spatial basis vector and vertical spatial basis vector of each CSI-RS resource separately. Optionally, if there is some similarity, the method described in Option 1 can be used to indicate.

[0464] N tot Method for indicating the spatial basis vector offset information corresponding to each CSI-RS resource:

[0465] All reported N tot CSI-RS resources or parts M (<N tot ) CSI-RS resources correspond to the same spatial basis vector offset information. When M CSI-RS resources correspond to the same spatial basis vector offset information, the terminal also reports additional indication information to indicate which CSI-RS resources correspond to the same spatial basis vector offset information. The size of the additional indication information is the same as that described in Option 1.

[0466] Optionally, the terminal reports an additional bit to indicate N tot Whether the spatial basis vector offset information corresponding to the CSI-RS resources is the same, if the same, only one indication information is reported; if not, N tot The spatial basis vector offset information corresponding to each CSI-RS resource is indicated respectively.

[0467] (2) Rel-15 Type I multi-panel codebook

[0468] N tot The method for indicating the spatial basis vectors corresponding to the CSI-RS resources and the method for indicating the spatial basis vector offset information are the same as the indication method of the above-mentioned Rel-15 Type I single-panel codebook.

[0469] N tot Method for indicating phase offset information between adjacent panels corresponding to CSI-RS resources:

[0470] All reported N tot CSI-RS resources or parts M (<N tot ) CSI-RS resources correspond to the same N g -1 phase offset information between adjacent panels. When M CSI-RS resources correspond to the same N g -1 phase offset information between adjacent panels, the terminal also reports an additional indication information indicating which part of the CSI-RS resources corresponds to N g -The phase offset information between adjacent panels is the same. The size of the additional indication information is the same as that described in Option 1.

[0471] (3) Rel-15 Type II codebook

[0472] N tot The indication method of L spatial basis vectors corresponding to CSI-RS resources is as follows:

[0473] Alt1: The terminal reports all N tot The indication information of the same spatial basis vector group corresponding to the CSI-RS resources is the size of bits, and a method for indicating L spatial basis vectors selected from N1N2 spatial basis vectors in the indicated spatial basis vector group includes:

[0474] Alt1-1: Report the indication information of the selected L spatial basis vectors corresponding to each CSI-RS resource respectively. The indication information size is bits.

[0475] Alt1-2: Part M(<N tot ) CSI-RS resources corresponding to the selected L spatial basis vectors are the same, and the indication information of the selected L spatial basis vectors corresponding to other CSI-RS resources are respectively indicated, and the size is The terminal also indicates, using the method described in Option 1, which M CSI-RS resources correspond to the same indication information of the selected L spatial basis vectors.

[0476] Alt1-3: N tot CSI-RS resources or parts M (<N tot ) CSI-RS resources corresponding to the selected L spatial basis vectors, the indication information of part L'(<L) basis vectors is the same, the terminal through bits indicate the same partial spatial basis vectors, through bits indicate the value of L'. The terminal then bits respectively indicate the remaining L-L' spatial basis vectors corresponding to each CSI-RS resource.

[0477] Alt1-4: N tot The indication information of the selected L spatial basis vectors corresponding to the CSI-RS resources is the same, through bits indicate the same L spatial basis vectors. The terminal also reports an additional bit to indicate N tot Whether the indication information of the selected L spatial basis vectors corresponding to the CSI-RS resources are all the same. If they are all different, they can be indicated by the Alt1-1 or Alt1-3 method; if they are partially the same, they can be indicated by the Alt1-2 method.

[0478] Alt2: Partial M(<N tot ) CSI-RS resources corresponding to the spatial basis vector group have the same indication information, through bits indicate the same spatial basis vector group, and the method for selecting L spatial basis vectors from N1N2 spatial basis vectors is the same as Alt1-1 to Alt1-4 above. tot -M CSI-RS resources, the terminal then reports them separately bits indicate the selected L spatial basis vectors corresponding to each of the remaining CSI-RS resources. Optionally, the method in Option 1 is used to indicate which portion of the CSI-RS resources have the same indication information for the spatial basis vector groups.

[0479] Alt3: Terminal reports N tot The indication information of the same L' spatial basis vectors corresponding to the CSI-RS resources is the size of bits, and through bits indicate the value of L'. The terminal then reports bits indicate the remaining L-L' spatial basis vectors corresponding to each CSI-RS resource.

[0480] (4) Rel-16 Type II codebook

[0481] N totThe method for indicating the spatial basis vectors corresponding to the CSI-RS resources is the same as the method for indicating the spatial basis vectors of the Rel-15 Type II codebook mentioned above.

[0482] N tot Method for indicating the frequency domain basis vector corresponding to each CSI-RS resource:

[0483] For N3≤19:

[0484] Opt1-1: Terminal reports N tot M corresponding to the CSI-RS resources v '(<M v ) the same frequency domain basis vectors, through bits indicate the same M v 'Frequency domain basis vectors and report bits indicating M v 'The terminal then reports bits indicate the remaining M corresponding to each CSI-RS resource v -M v '-1 frequency domain basis vectors.

[0485] Opt1-2: Part M (<N tot ) CSI-RS resources correspond to M v The same frequency domain basis vectors, through bits indicate the same M v frequency domain basis vectors. For the remaining N tot -M CSI-RS resources, the terminal then reports them separately bits indicate the M corresponding to each remaining CSI-RS resource v frequency domain basis vectors.

[0486] Opt1-3: By predefining or indicating a window of size W, W<N3, for each CSI-RS resource corresponding to M v frequency domain basis vectors, the terminal passes The starting point of the window can be indicated by the terminal through The starting point of the window is determined by a predefined bit. v frequency domain basis vectors, the terminal passes bits indicate the starting point of the window, and then pass bits indicating the M selected by the terminal v frequency domain basis vectors.

[0487] For N3>19:

[0488] Opt2-1: Ntot The starting point of the frequency domain basis vector window corresponding to each CSI-RS resource is the same. Assume that the size of the frequency domain basis vector window is 2M. v , the terminal passes bits indicate the starting point of the window, and then pass bits indicate the selected M corresponding to each CSI-RS resource v frequency domain basis vectors.

[0489] Opt2-2: N tot The starting point of the frequency domain basis vector window corresponding to each CSI-RS resource is the same, and the terminal passes bits indicate the same M v 'Frequency domain basis vectors and report bits indicating M v '. The terminal also passes bits indicate the remaining M corresponding to each CSI-RS resource v -M v '-1 frequency domain basis vectors.

[0490] Opt2-3: Part M (<N tot The starting point of the frequency domain basis vector window corresponding to each of the N CSI-RS resources is the same. tot -The frequency domain basis vectors corresponding to the M CSI-RS resources are respectively For the above M CSI-RS resources, the terminal indicates the selected M v The frequency domain basis vector method is the same as Opt2-1 and Opt2-2.

[0491] Opt2-4: N tot The starting point of the frequency domain basis vector window corresponding to the CSI-RS resources is the same, and the selected M v The frequency domain basis vectors are also the same, through bits indicating N tot The same M corresponding to the CSI-RS resources v Frequency domain basis vectors. Optionally, the terminal reports 1 bit to indicate N tot Whether the starting points of the frequency domain basis vector windows corresponding to the CSI-RS resources are the same, if different, it is necessary to indicate the starting point of the frequency domain basis vector window corresponding to each CSI-RS resource separately; then indicate N by 1 bit tot Whether the selected frequency domain basis vectors corresponding to the CSI-RS resources are also the same, if different, the above-mentioned Opt2-1 to Opt2-3 methods can be used to indicate.

[0492] (5) Rel-17 port selects Type II codebook

[0493] N tot Method for indicating port selection corresponding to each CSI-RS resource:

[0494] Terminal reports N tot or part of M(<N tot ) CSI-RS resources corresponding to the same K1 'port selection indication information, and then through bits indicate the remaining The terminal is connected to the selected port. bits indicate the same K1' port and report bits indicate the value of K1'. If part M(<N tot ) CSI-RS resources correspond to the same K1 port selection indication information, and the remaining N tot -M CSI-RS resources corresponding to the port selection are respectively bits indicate.

[0495] The following further describes the details with reference to specific embodiments.

[0496] Rel-15 Type I single-panel codebook:

[0497] Assume that the UE needs to report 4 PMIs corresponding to 4 CSI-RS resources. For the spatial basis vector indication of the 4 PMIs, the UE reports bits indicate a horizontal dimension of the spatial basis vector, and then report bits indicate a vertical dimension of the spatial basis vector. Optionally, the UE also indicates whether the spatial basis vectors contained in the four PMIs are the same by reporting 1 bit. If they are not the same, the spatial basis vectors contained in the four PMIs can be indicated separately. If there are two CSI-RS resources corresponding to the PMIs that contain the same spatial basis vectors, the UE can use a size of K s = 6-bit bitmap indicates which two CSI-RS resources correspond to PMIs whose spatial basis vectors are the same, as shown in Table 2.

[0498] Table 2

[0499] "1" in the bitmap indicates the same, that is, the spatial basis vectors included in the PMIs corresponding to the second and fourth CSI-RS resources are the same, and the spatial basis vectors included in the PMIs corresponding to other CSI-RS resources are indicated separately.

[0500] The spatial basis vector offset information indication method is similar to the above-mentioned spatial basis vector indication method.

[0501] Rel-15 Type II codebook:

[0502] It is still assumed that the UE needs to report four PMIs corresponding to four CSI-RS resources.

[0503] The UE first indicates that the indication information of the four spatial basis vector groups is the same through 1 bit, and then bits indicate the same spatial basis vector group. If the Alt1-3 method in the above embodiment is used for indication, for the L spatial basis vectors contained in the PMI corresponding to the 4 CSI-RS resources, a total of bits to indicate.

[0504] Rel-16 Type II codebook:

[0505] Frequency domain basis vector indication method: N3≤19:

[0506] If the method Opt1-3 is used for indication, it is assumed that the window size is predefined and defined as W=3M v The starting point of the window is reported by the UE bits to indicate, and then, respectively, through bits indicate the frequency domain basis vectors contained in the PMI corresponding to each CSI-RS resource. N3>19:

[0507] If Opt2-2 method is used for indication, UE reports bits indicate the same M v 'Frequency domain basis vectors, and then respectively through bits indicate the remaining M contained in the PMI corresponding to each CSI-RS resource v -M v '-1 frequency domain basis vectors.

[0508] According to the embodiments of the present disclosure, the feedback overhead of the terminal can be reduced while ensuring that the system performance remains unchanged.

[0509] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0510] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0511] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0512] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0513] FIG6A is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure. As shown in FIG6A , the communication device 6100 may include at least one of a transceiver module 6101 and a processing module 6102. In some embodiments, the transceiver module 6101 is used to receive configuration information sent by a network device, and the configuration information is used to configure K s CSI-RS resources, K s The transceiver module 6101 is further configured to send first information to the network device, the first information including CSI-RS resource indication information, the CSI-RS resource indication information being used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resource, N tot is an integer greater than 1, and N tot Less than or equal to K sOptionally, the transceiver module is used to execute at least one of the communication steps such as sending and / or receiving (such as step S2102, but not limited thereto) executed by the terminal in any of the above methods, which will not be described in detail here. Optionally, the processing module is used to execute at least one of the other steps executed by the terminal in any of the above methods, which will not be described in detail here.

[0514] FIG6B is a schematic diagram of the structure of the communication device proposed in an embodiment of the present disclosure. As shown in FIG6B , the communication device 6200 may include at least one of a transceiver module 6201 and a processing module 6202. In some embodiments, the transceiver module 6201 is used to send configuration information to the terminal, and the configuration information is used to configure K s CSI-RS resources, K s is an integer greater than 1. The above-mentioned transceiver module 6201 is further configured to receive first information sent by the terminal, the first information including CSI-RS resource indication information, the CSI-RS resource indication information being used to indicate the N selected by the terminal. tot CSI-RS resources, the first information also includes the N tot The PMI corresponding to the CSI-RS resources, N tot is an integer greater than 1, and N tot Less than or equal to the K s Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and / or receiving (such as step S2101, but not limited thereto) executed by the network device in any of the above methods, which will not be described in detail here. Optionally, the processing module is used to execute at least one of the other steps executed by the network device in any of the above methods, which will not be described in detail here.

[0515] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0516] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0517] Figure 7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0518] As shown in FIG7A , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The communication device 7100 is used to perform any of the above methods.

[0519] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0520] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101 and step S2102, but not limited thereto), and the processor 7101 performs at least one of the other steps.

[0521] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0522] In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102. The interface circuit 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0523] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0524] 7B is a schematic diagram of the structure of a chip 7200 proposed in an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7B , but the present disclosure is not limited thereto.

[0525] The chip 7200 includes one or more processors 7201 , and the chip 7200 is configured to execute any of the above methods.

[0526] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0527] In some embodiments, the interface circuit 7202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S2102, but not limited thereto), and the processor 7201 executes at least one of the other steps.

[0528] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0529] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0530] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0531] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0532] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that, Performed by a terminal, the method includes: Receive configuration information sent by the network device, the configuration information is used to configure K s Channel state information reference signal CSI-RS resources, the K s is an integer greater than 1; Send a first piece of information to the network device, where the first piece of information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate N tot CSI-RS resources selected by the terminal. The first piece of information further includes the N tot precoding matrix indicator (PMI) corresponding to the CSI-RS resources. N tot is an integer greater than 1, and N tot is less than or equal to K s .

2. The method according to claim 1, wherein The N tot PMI corresponding to CSI-RS resources includes at least one of the following: Second information, used to indicate the same first-dimensional and second-dimensional spatial domain basis vectors corresponding to the N tot CSI-RS resources; Third information, used to indicate the same first-dimensional and second-dimensional spatial domain basis vectors corresponding to M1 CSI-RS resources among the N tot CSI-RS resources; Fourth information, used to indicate the first and second dimensional spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M1 CSI-RS resources; The fifth piece of information, used to indicate the CSI-RS resources among the N tot CSI-RS resources with the same spatial domain basis vectors in the first dimension and the second dimension.

3. The method according to claim 1, characterized in that The N tot PMIs corresponding to CSI-RS resources include at least one of the following: Sixth information, used to indicate the same spatial domain basis vectors of the first dimension corresponding to the N tot CSI-RS resources; The seventh piece of information, used to indicate the same spatial domain basis vectors of the first dimension corresponding to M2 CSI-RS resources among the N tot CSI-RS resources; The eighth piece of information, used to indicate the spatial domain basis vectors of the first dimension respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M2 CSI-RS resources; The ninth piece of information, used to indicate the CSI-RS resources with the same spatial domain basis vectors in the first dimension among the tot N CSI-RS resources.

4. The method according to claim 1 or 3, characterized in that, The N tot PMI corresponding to the CSI-RS resources includes at least one of the following: The tenth piece of information, used to indicate the spatial domain basis vectors of the same second dimension corresponding to the N tot CSI-RS resources; The eleventh piece of information, used to indicate the same spatial domain basis vectors of the second dimension corresponding to M3 CSI-RS resources among the N tot CSI-RS resources; The twelfth piece of information, used to indicate the spatial domain basis vectors of the second dimension respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M3 CSI-RS resources; The thirteenth piece of information, used to indicate the CSI-RS resources with the same spatial domain basis vectors in the second dimension among the tot N CSI-RS resources.

5. The method according to any one of claims 2-4, characterized in that The said N tot The PMI corresponding to the CSI-RS resources further includes: The fourteenth piece of information, used to indicate whether the spatial domain basis vectors of the first dimension corresponding to each of the N tot CSI-RS resources are the same as the spatial domain basis vectors of the second dimension.

6. The method according to any one of claims 1-5, characterized in that, The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The fifteenth piece of information, used to indicate the same spatial domain base vector offset information corresponding to the N tot CSI-RS resources; The sixteenth piece of information, used to indicate the same spatial domain base vector offset information corresponding to M4 CSI-RS resources among the N tot CSI-RS resources; The seventeenth piece of information, used to indicate the spatial domain base vector offset information respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M4 CSI-RS resources; The eighteenth piece of information, used to indicate the CSI-RS resources with the same spatial basis vector offset information among the tot N CSI-RS resources.

7. The method according to any one of claims 1 to 6, characterized in that The said N tot The PMI corresponding to the CSI-RS resources includes at least one of the following: The nineteenth piece of information, used to indicate the same phase offset information corresponding to the N tot CSI-RS resources, where the phase offset information includes the phase offset between each adjacent panel among the N g panels; The twentieth piece of information, used to indicate the same phase offset information corresponding to M5 CSI-RS resources among the N tot CSI-RS resources; The twenty-first piece of information, used to indicate the CSI-RS resources with the same phase offset information among the tot N CSI-RS resources.

8. The method according to claim 1, wherein One of the CSI-RS resources corresponds to an airspace basis vector group, and the PMI corresponding to the N tot CSI-RS resources includes: The twenty-second piece of information, used to indicate the same spatial domain basis vector group corresponding to the N tot CSI-RS resources, where the spatial domain basis vector group is used to select L spatial domain basis vectors; and, the N tot PMIs corresponding to CSI-RS resources further include at least one of the following: The twenty-third piece of information, used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the N tot CSI-RS resources; The twenty-fourth piece of information, which is used to indicate the same L spatial domain basis vectors corresponding to the N tot CSI-RS resources; The twenty-fifth piece of information, used to indicate whether the L spatial domain basis vectors respectively corresponding to the N tot CSI-RS resources are the same; The twenty-sixth piece of information, which is used to indicate, based on the airspace basis vector group, the same L airspace basis vectors corresponding to M6 CSI-RS resources among the N tot CSI-RS resources; The twenty-seventh piece of information, used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M6 CSI-RS resources; The twenty-eighth piece of information, used to indicate, based on the airspace basis vector group, the same L' airspace basis vectors among the L airspace basis vectors respectively corresponding to the N tot CSI-RS resources, and the remaining L - L' airspace basis vectors respectively corresponding to the N tot CSI-RS resources, and to indicate the value of L'; The twenty-ninth piece of information, used to indicate, based on the spatial domain basis vector group, the same L' spatial domain basis vectors among the L spatial domain basis vectors respectively corresponding to M7 CSI-RS resources out of the N tot CSI-RS resources, and the remaining L - L' spatial domain basis vectors respectively corresponding to the M7 CSI-RS resources, and to indicate the value of L'; The thirtieth piece of information, which is used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the remaining CSI-RS resources among the N CSI-RS resources except for the M7 CSI-RS resources; tot ​ The thirty-first piece of information, used to indicate the CSI-RS resources corresponding to the same L spatial domain basis vectors among the N tot CSI-RS resources.

9. The method according to claim 1, characterized in that One of the CSI-RS resources corresponds to a spatial domain basis vector group, and the PMI corresponding to the N tot CSI-RS resources includes: The thirty-second piece of information, which is used to indicate the same spatial domain basis vector group corresponding to M8 CSI-RS resources among the N tot CSI-RS resources, where the spatial domain basis vector group is used to select L spatial domain basis vectors; The thirty-third piece of information, which is used to indicate the CSI-RS resources corresponding to the same spatial domain basis vector group among the tot N CSI-RS resources; And, the N tot PMIs corresponding to CSI-RS resources further include at least one of the following: The thirty-fourth information, for indicating, based on the spatial domain basis vector group, the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources; The thirty-fifth information, for indicating, based on the spatial domain basis vector group, the same L spatial domain basis vectors corresponding to the M8 CSI-RS resources; The thirty-sixth information, for indicating whether the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources are the same; The thirty-seventh information, for indicating, based on the spatial domain basis vector group, the same L spatial domain basis vectors corresponding to M9 CSI-RS resources among the M8 CSI-RS resources; The thirty-eighth information, for indicating, based on the spatial domain basis vector group, the L spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources other than the M9 CSI-RS resources among the M8 CSI-RS resources; The thirty-ninth information, for indicating, based on the spatial domain basis vector group, the same L' spatial domain basis vectors among the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources, and the remaining L - L' spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources, and indicating the value of L'; The fortieth piece of information, which is used to indicate, based on the airspace basis vector group, L' identical airspace basis vectors among the L airspace basis vectors respectively corresponding to M CSI-RS resources out of the M8 CSI-RS resources, and the remaining L - L' airspace basis vectors respectively corresponding to the M CSI-RS resources, and to indicate the value of L'. 10 10 ​​ The forty-first piece of information, which is used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the remaining CSI-RS resources among the M8 CSI-RS resources except for the M 10 CSI-RS resources; The forty-second information, for indicating the CSI-RS resources among the M8 CSI-RS resources whose corresponding L spatial domain basis vectors are the same; The forty-third piece of information, used to indicate the spatial domain basis vector groups respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M8 CSI-RS resources, and to indicate L spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources based on the spatial domain basis vector groups corresponding to the remaining CSI-RS resources.

10. The method according to claim 1, wherein The said N tot The PMI corresponding to the CSI-RS resources includes: The forty-fourth piece of information, used to indicate the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the N tot CSI-RS resources, and the remaining L - L' spatial basis vectors respectively corresponding to the N tot CSI-RS resources, and to indicate the value of L'.

11. The method according to any one of claims 8 - 10, characterized in that, The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The forty-fifth piece of information, used to indicate the M tot frequency-domain basis vectors that are the same among the M v frequency-domain basis vectors corresponding to each of the N v CSI-RS resources, and the remaining frequency-domain basis vectors other than the M tot ' frequency-domain basis vectors corresponding to each of the N v CSI-RS resources, as well as an indication of the value of the M v '; The forty-sixth piece of information, used to indicate the M tot CSI-RS resources out of the N 11 same M v frequency-domain basis vectors corresponding to the CSI-RS resources; The forty-seventh piece of information, used to indicate the tot remaining CSI-RS resources among the 11 N CSI-RS resources except for the v M frequency-domain basis vectors respectively corresponding to the M CSI-RS resources; The forty-eighth information, for indicating the starting point of a frequency domain basis vector window; The forty-ninth piece of information is used to indicate, based on the starting point of a frequency-domain basis vector window, the M tot frequency-domain basis vectors respectively corresponding to the N v CSI-RS resources, where the length of the frequency-domain basis vector window is less than the number of subbands N3.

12. The method according to any one of claims 8 to 10, characterized in that, One of the CSI-RS resources corresponds to one frequency domain basis vector window; The above-mentioned N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The fiftieth piece of information, used to indicate the starting point of the same frequency-domain base vector window corresponding to the tot N CSI-RS resources; The fifty-first piece of information is used to indicate, based on the same starting point corresponding to the N tot CSI-RS resources, the M tot frequency-domain basis vectors respectively corresponding to the N v CSI-RS resources; The fifty-second piece of information, used to indicate, based on the same starting point corresponding to the N tot CSI-RS resources, the same M tot frequency-domain basis vectors respectively corresponding to the N v CSI-RS resources, and the remaining frequency-domain basis vectors other than the M v ’ frequency-domain basis vectors corresponding to the N tot CSI-RS resources respectively, as well as indicating the value of the M v ’; v ’; The fifty-third piece of information is used to indicate, based on the same starting point corresponding to the N tot CSI-RS resources, the same M tot frequency-domain basis vectors corresponding to the N v CSI-RS resources; The fifty-fourth piece of information, used to indicate the tot starting points of the same frequency-domain basis vector windows corresponding to M 12 CSI-RS resources among the N CSI-RS resources; The fifty-fifth piece of information is used to indicate, based on the same starting point corresponding to the M 12 CSI-RS resources, the M 12 frequency-domain basis vectors respectively corresponding to the M v CSI-RS resources; The fifty-sixth piece of information, used to indicate the starting points of the frequency-domain basis vector windows respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M 12 CSI-RS resources; The fifty-seventh piece of information is used to indicate, based on the starting points of the frequency-domain basis vector windows corresponding to the remaining CSI-RS resources except for the M 12 CSI-RS resources, the M v frequency-domain basis vectors corresponding to the remaining CSI-RS resources respectively; The fifty-eighth piece of information, used to indicate whether the starting points of the frequency-domain basis vector windows corresponding to the tot N CSI-RS resources are the same; The fifty-ninth piece of information, used to indicate whether the M tot frequency-domain basis vectors corresponding to the N v CSI-RS resources are the same respectively.

13. The method according to claim 1, wherein The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: Sixtieth information, used to indicate the same K1' ports among the K1 selected ports corresponding to the N tot CSI-RS resources, and the remaining selected ports other than the K1' ports respectively corresponding to the N tot CSI-RS resources, as well as indicating the value of the K1'; The sixty-first piece of information, used to indicate the N tot same K1' ports among the K1 selected ports corresponding to M 13 CSI-RS resources among the CSI-RS resources, and the remaining selected ports except the K1' ports respectively corresponding to the M 13 CSI-RS resources, and to indicate the value of K1'; The sixty-second piece of information, used to indicate the K1 selected ports respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources, excluding the M 13 CSI-RS resources The sixty-third piece of information, used to indicate the tot same K1 selected ports corresponding to M 14 CSI-RS resources among the N CSI-RS resources; The sixty-fourth piece of information, used to indicate the N tot selected ports corresponding to the remaining CSI-RS resources among the CSI-RS resources, excluding the M 14 CSI-RS resources, respectively, where there are K1 such selected ports for each of the remaining CSI-RS resources.

14. A communication method, characterized in that Performed by a network device, the method includes: Send configuration information to the terminal, where the configuration information is used to configure K s CSI-RS resources, where the K s is an integer greater than 1; Receive a first piece of information sent by the terminal, where the first piece of information includes CSI-RS resource indication information, and the CSI-RS resource indication information is used to indicate N tot CSI-RS resources selected by the terminal, and the first piece of information further includes PMIs corresponding to the N tot CSI-RS resources, where N tot is an integer greater than 1, and N tot is less than or equal to K s .

15. The method according to claim 14, wherein The N tot PMIs corresponding to CSI-RS resources include at least one of the following: Second information, used to indicate the same first-dimensional and second-dimensional spatial domain basis vectors corresponding to the N tot CSI-RS resources; Third information, used to indicate the same first-dimension and second-dimension spatial domain basis vectors corresponding to M1 CSI-RS resources among the N tot CSI-RS resources; Fourth information, used to indicate the first-dimensional and second-dimensional spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M1 CSI-RS resources; The fifth piece of information, used to indicate the CSI-RS resources among the N tot CSI-RS resources with the same spatial domain basis vectors in the first dimension and the second dimension.

16. The method according to claim 14, wherein The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The sixth information, used to indicate the same spatial domain basis vectors of the first dimension corresponding to the tot N CSI-RS resources; The seventh piece of information, used to indicate the same spatial domain basis vectors of the first dimension corresponding to M2 CSI-RS resources among the N tot CSI-RS resources; The eighth piece of information, used to indicate the spatial domain basis vectors of the first dimension respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M2 CSI-RS resources; The ninth piece of information, used to indicate the CSI-RS resources with the same spatial domain basis vectors in the first dimension among the tot N CSI-RS resources.

17. The method according to claim 14 or 16, characterized in that The N tot PMIs corresponding to CSI-RS resources include at least one of the following: The tenth piece of information, used to indicate the same spatial domain basis vectors of the second dimension corresponding to the N tot CSI-RS resources; The eleventh piece of information, used to indicate the same spatial domain basis vectors of the second dimension corresponding to M3 CSI-RS resources among the N tot CSI-RS resources; The twelfth piece of information, used to indicate the spatial domain basis vectors of the second dimension respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M3 CSI-RS resources; The thirteenth piece of information, used to indicate CSI-RS resources with the same spatial domain basis vectors in the second dimension among the tot N CSI-RS resources.

18. The method according to any one of claims 15 - 17, characterized in that The said N tot The PMI corresponding to the CSI-RS resource also includes: The fourteenth piece of information, used to indicate whether the spatial domain basis vector in the first dimension corresponding to each of the N tot CSI-RS resources is the same as the spatial domain basis vector in the second dimension.

19. The method according to any one of claims 14-18, characterized in that, The N tot PMIs corresponding to CSI-RS resources include at least one of the following: The fifteenth piece of information, used to indicate the same spatial domain base vector offset information corresponding to the N tot CSI-RS resources; Sixteenth information, used to indicate the same spatial domain base vector offset information corresponding to M4 CSI-RS resources among the N tot CSI-RS resources; The seventeenth piece of information, used to indicate the spatial domain basis vector offset information respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M4 CSI-RS resources; The eighteenth piece of information, used to indicate the CSI-RS resources with the same spatial basis vector offset information among the tot N CSI-RS resources.

20. The method according to any one of claims 14-19, characterized in that, The N tot PMIs corresponding to CSI-RS resources include at least one of the following: The nineteenth piece of information, used to indicate the same phase offset information corresponding to the N tot CSI-RS resources, where the phase offset information includes the phase offset between every two adjacent panels among the N g panels; The twentieth piece of information, used to indicate the same phase offset information corresponding to M5 CSI-RS resources among the N tot CSI-RS resources; The twenty-first piece of information, used to indicate CSI-RS resources with the same phase offset information among the tot N CSI-RS resources.

21. The method according to claim 14, wherein One of the CSI-RS resources corresponds to an airspace basis vector group, and the PMI corresponding to the N tot CSI-RS resources includes: The twenty-second piece of information, used to indicate the same set of spatial domain basis vectors corresponding to the N tot CSI-RS resources, where the set of spatial domain basis vectors is used to select L spatial domain basis vectors; And, the PMI corresponding to the N tot CSI-RS resources further includes at least one of the following: The twenty-third piece of information, used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the N tot CSI-RS resources; The twenty-fourth piece of information, which is used to indicate the same L spatial domain basis vectors corresponding to the N tot CSI-RS resources; The twenty-fifth piece of information, used to indicate whether the L spatial domain basis vectors respectively corresponding to the N tot CSI-RS resources are the same; The twenty-sixth piece of information, which is used to indicate, based on the airspace basis vector group, the same L airspace basis vectors corresponding to M6 CSI-RS resources among the N tot CSI-RS resources; The twenty-seventh piece of information, used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M6 CSI-RS resources; The twenty-eighth piece of information, used to indicate, based on the airspace basis vector group, the same L' airspace basis vectors among the L airspace basis vectors corresponding to the N tot CSI-RS resources respectively, and the remaining L - L' airspace basis vectors corresponding to the N tot CSI-RS resources respectively, and to indicate the value of L'; The twenty-ninth piece of information, used to indicate, based on the airspace basis vector group, the same L' airspace basis vectors among the L airspace basis vectors respectively corresponding to M7 CSI-RS resources out of the N tot CSI-RS resources, and the remaining L - L' airspace basis vectors respectively corresponding to the M7 CSI-RS resources, and to indicate the value of the L'; The thirtieth piece of information, used to indicate, based on the airspace basis vector group, the L airspace basis vectors respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M7 CSI-RS resources; The thirty-first piece of information, used to indicate the CSI-RS resources among the N tot CSI-RS resources corresponding to the same L spatial domain basis vectors.

22. The method according to claim 14, wherein One of the CSI-RS resources corresponds to one spatial domain basis vector group, and the PMI corresponding to the N tot CSI-RS resources includes: The thirty-second piece of information, used to indicate the same spatial domain basis vector group corresponding to M out of the N tot CSI-RS resources, where the spatial domain basis vector group is used to select L spatial domain basis vectors; The thirty-third piece of information, which is used to indicate CSI-RS resources corresponding to the same spatial domain basis vector group among the tot N CSI-RS resources; And, the N tot PMIs corresponding to CSI-RS resources further include at least one of the following: The thirty-fourth information, for indicating, based on the spatial domain basis vector group, the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources; The thirty-fifth information, for indicating, based on the spatial domain basis vector group, the same L spatial domain basis vectors corresponding to the M8 CSI-RS resources; The thirty-sixth information, for indicating whether the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources are the same; The thirty-seventh information, for indicating, based on the spatial domain basis vector group, the same L spatial domain basis vectors corresponding to M9 CSI-RS resources among the M8 CSI-RS resources; The thirty-eighth information, for indicating, based on the spatial domain basis vector group, the L spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources other than the M9 CSI-RS resources among the M8 CSI-RS resources; The thirty-ninth information, for indicating, based on the spatial domain basis vector group, the same L' spatial domain basis vectors among the L spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources, and the remaining L - L' spatial domain basis vectors respectively corresponding to the M8 CSI-RS resources, and indicating the value of L'; The fortieth piece of information, which is used to indicate, based on the airspace basis vector group, the same L' airspace basis vectors among the L airspace basis vectors respectively corresponding to M of the M8 CSI-RS resources, and the remaining L - L' airspace basis vectors respectively corresponding to the M CSI-RS resources, and to indicate the value of L'. 10 Among the L airspace basis vectors respectively corresponding to M of the M8 CSI-RS resources, the same L' airspace basis vectors, and the remaining L - L' airspace basis vectors respectively corresponding to the M CSI-RS resources, and to indicate the value of L'. 10 And to indicate the value of L'. The forty-first piece of information is used to indicate, based on the airspace basis vector group, among the M8 CSI-RS resources, except for the M 10 CSI-RSs The L spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources other than the resources; The forty-second information, for indicating the CSI-RS resources among the M8 CSI-RS resources whose corresponding L spatial domain basis vectors are the same; The forty-third piece of information, used to indicate the spatial domain basis vector groups respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except the M8 CSI-RS resources, and indicate the L spatial domain basis vectors respectively corresponding to the remaining CSI-RS resources based on the spatial domain basis vector groups corresponding to the remaining CSI-RS resources.

23. The method according to claim 14, characterized in that, The said N tot PMIs corresponding to CSI-RS resources include: The forty-fourth piece of information, used to indicate the same L' spatial basis vectors among the L spatial basis vectors respectively corresponding to the N tot CSI-RS resources, the remaining L - L' spatial basis vectors respectively corresponding to the N tot CSI-RS resources, and indicate the value of the L'.

24. The method according to any one of claims 21-23, characterized in that, The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The forty-fifth piece of information, used to indicate the M tot frequency-domain basis vectors that are the same among the M v frequency-domain basis vectors corresponding to the N v CSI-RS resources respectively, and the remaining frequency-domain basis vectors other than the M tot ' frequency-domain basis vectors corresponding to the N v CSI-RS resources respectively, and to indicate the value of the M v '; The forty-sixth piece of information, used to indicate the M tot CSI-RS resources out of the N 11 same M v frequency-domain basis vectors corresponding to the CSI-RS resources; The forty-seventh piece of information, used to indicate the M tot frequency domain basis vectors respectively corresponding to the remaining CSI-RS resources among the N 11 CSI-RS resources excluding the M v CSI-RS resources; The forty-eighth information, for indicating the starting point of a frequency domain basis vector window; The forty-ninth piece of information is used to indicate M frequency-domain basis vectors corresponding to the N CSI-RS resources respectively based on the starting point of a frequency-domain basis vector window, and the length of the frequency-domain basis vector window is less than the number of subbands N3. tot frequency-domain basis vectors, where the length of the frequency-domain basis vector window is less than the number of subbands N3. v ​ 25. The method according to any one of claims 21-23, characterized in that, One of the CSI-RS resources corresponds to one frequency domain basis vector window; The said N tot The PMI corresponding to the CSI-RS resources includes at least one of the following: The fiftieth piece of information, used to indicate the starting point of the same frequency-domain basis vector window corresponding to the tot N CSI-RS resources; The fifty-first piece of information is used to indicate, based on the same starting point corresponding to the N tot CSI-RS resources, the M tot frequency-domain basis vectors respectively corresponding to the N v CSI-RS resources; The fifty-second piece of information, used to indicate, based on the same starting point corresponding to the N tot CSI-RS resources, the same M tot frequency-domain basis vectors respectively corresponding to the N v CSI-RS resources, the remaining frequency-domain basis vectors other than the M v ’ frequency-domain basis vectors, and the N tot CSI-RS resources respectively corresponding to, and to indicate the value of the M v ’; v ’ The fifty-third piece of information is used to indicate the same starting point corresponding to the N tot CSI-RS resources, and the same M tot corresponding to the N CSI-RS resources v frequency-domain basis vectors; The fifty-fourth piece of information, used to indicate the tot starting points of the same frequency-domain basis vector windows corresponding to M 12 CSI-RS resources among the N CSI-RS resources; The fifty-fifth piece of information is used to indicate, based on the same starting point corresponding to the M 12 CSI-RS resources, the M 12 CSI-RS resources respectively corresponding to the M v frequency domain basis vectors; The fifty-sixth piece of information, used to indicate the starting points of the frequency-domain basis vector windows respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M 12 CSI-RS resources; The fifty-seventh piece of information is used to indicate, based on the starting points of the frequency-domain basis vector windows corresponding to the remaining CSI-RS resources except for the 12 M CSI-RS resources, the M v frequency-domain basis vectors corresponding to the remaining CSI-RS resources respectively; The fifty-eighth piece of information, used to indicate whether the starting points of the frequency-domain basis vector windows corresponding to the tot N CSI-RS resources are the same; The fifty-ninth piece of information, used to indicate whether the M tot frequency domain basis vectors corresponding to the N v CSI-RS resources are the same.

26. The method according to claim 14, wherein The said N tot The PMI corresponding to the CSI-RS resource includes at least one of the following: The sixtieth piece of information, used to indicate the same K1' ports among the K1 selected ports corresponding to the N tot CSI-RS resources, and the remaining selected ports other than the K1' ports respectively corresponding to the N tot CSI-RS resources, and to indicate the value of the K1'; The sixty-first piece of information, used to indicate the N tot same K1' ports among the K1 selected ports corresponding to M 13 CSI-RS resources out of the CSI-RS resources, and the remaining selected ports other than the K1' ports respectively corresponding to the M 13 CSI-RS resources, and to indicate the value of K1'; The sixty-second piece of information, used to indicate the N tot CSI-RS resources excluding the M 13 remaining CSI-RS resources out of the CSI-RS resources K1 selected ports respectively corresponding to the resources; The sixty-third piece of information, used to indicate the tot same K1 selected ports corresponding to M 14 CSI-RS resources among the N CSI-RS resources; The sixty-fourth piece of information, used to indicate the K1 selected ports respectively corresponding to the remaining CSI-RS resources among the N tot CSI-RS resources except for the M 14 CSI-RS resources.

27. A communication device, characterized in that, The apparatus includes: A transceiver module, configured to receive configuration information sent by a network device, where the configuration information is used to configure K s CSI-RS resources, and the K s is an integer greater than 1; The transceiver module is further configured to send first information to the network device, where the first information includes CSI-RS resource indication information for indicating N tot CSI-RS resources selected by the terminal, and the first information further includes PMIs corresponding to the N tot CSI-RS resources, where N tot is an integer greater than 1, and N tot is less than or equal to K s .

28. A communication device, characterized in that, The apparatus includes: A transceiver module for sending configuration information to a terminal, where the configuration information is used to configure K s CSI-RS resources, and the K s is an integer greater than 1; The transceiver module is further configured to receive first information sent by the terminal, where the first information includes CSI-RS resource indication information for indicating N tot CSI-RS resources selected by the terminal, and the first information further includes PMIs corresponding to the N tot CSI-RS resources, where N tot is an integer greater than 1, and N tot is less than or equal to K s .

29. A terminal, characterized in that, Including: One or more processors; Wherein, the terminal is configured to execute the communication method according to any one of claims 1-13.

30. A network device, characterized in that, Including: One or more processors; Wherein, the network device is configured to execute the communication method according to any one of claims 14-26.

31. A communication system, characterized in that, Including a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1-13, and the network device is configured to implement the communication method according to any one of claims 14-26.

32. A storage medium, the storage medium stores instructions, characterized in that, When the instruction runs on the communication device, the communication device is caused to execute the communication method according to any one of claims 1-13 or any one of claims 14-26.

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