Communication method, terminal, network device, communication system, and storage medium

Abstract

A communication method, a terminal, a network device, a communication system, and a storage medium. The method comprises: a terminal determines a first codeword in a first codebook, the first codebook being constructed on the basis of angle parameters and distance parameters, the first codebook being a codebook used when the terminal is in a near-field region of a first antenna array, and the first antenna array being an antenna array used by a network device to transmit a wireless signal to the terminal; and the terminal sends first information to the network device, the first information being used for indicating the angle parameter and distance parameter corresponding to the first codeword. The first codebook for the near-field region can be constructed on the basis of the angle parameters and the distance parameters, so that the first codeword determined by the terminal can better match wireless propagation characteristics of the near-field region, thereby improving the transmission performance of the near-field region.

Description

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

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, a terminal, a network device, a communication system, and a storage medium. Background Art

[0002] Multiple-Input Multiple-Output (MIMO) technology effectively improves system capacity and throughput by introducing multiple antennas. On the one hand, continuously increasing the number of antennas will further improve system performance. On the other hand, the introduction of higher frequency bands will lead to greater path loss, and more antennas can provide greater beamforming gain.

[0003] Summary of the Invention

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

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

[0006] The terminal determines a first codeword in a first codebook, where the first codebook is constructed based on an angle parameter and a distance parameter, and the first codebook is a codebook used when the terminal is in a near-field area of ​​a first antenna array, where the first antenna array is an antenna array used by the network device to transmit wireless signals to the terminal.

[0007] The terminal sends first information to the network device, where the first information is used to indicate an angle parameter and a distance parameter corresponding to the first codeword.

[0008] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

[0009] The network device receives first information sent by the terminal, where the first information is used to indicate an angle parameter and a distance parameter corresponding to a first codeword, where the first codeword is a codeword in the first codebook, and the first codebook is constructed based on the angle parameter and the distance parameter. The first codebook is a codebook used when the terminal is in the near-field area of ​​the first antenna array, and the first antenna array is an antenna array used by the network device to transmit a wireless signal to the terminal.

[0010] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, comprising:

[0011] a processing module, configured to determine a first codeword in a first codebook, where the first codebook is constructed based on an angle parameter and a distance parameter, the first codebook being a codebook used when the terminal is in a near-field area of ​​a first antenna array, where the first antenna array is an antenna array used by the network device to transmit wireless signals to the terminal;

[0012] The transceiver module is used to send first information to the network device, where the first information is used to indicate the angle parameter and distance parameter corresponding to the first codeword.

[0013] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, comprising:

[0014] A transceiver module is configured to receive first information sent by a terminal, where the first information is used to indicate an angle parameter and a distance parameter corresponding to a first codeword, where the first codeword is a codeword in the first codebook, and the first codebook is constructed based on the angle parameter and the distance parameter. The first codebook is a codebook used when the terminal is in a near-field area of ​​a first antenna array, and the first antenna array is an antenna array used by the network device to transmit a wireless signal to the terminal.

[0015] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0016] one or more processors;

[0017] A memory coupled to the one or more processors, the memory comprising executable instructions, which, when executed by the one or more processors, causes the terminal to execute the communication method described in the first aspect.

[0018] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0019] one or more processors;

[0020] A memory coupled to the one or more processors, the memory comprising executable instructions, which, when executed by the one or more processors, causes the network device to execute the communication method described in the second aspect.

[0021] 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 described in the first aspect, and the network device is configured to implement the communication method described in the second aspect.

[0022] 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 as described in the first aspect or the second aspect.

[0023] In the above embodiment, a first codebook for the near-field area can be constructed based on the angle parameter and the distance parameter, so that the first codeword determined by the terminal can better match the wireless propagation characteristics of the near-field area, thereby improving the transmission performance of the near-field area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] FIG1A is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0026] FIG1B is an exemplary schematic diagram of a first antenna array provided according to an embodiment of the present disclosure.

[0027] FIG1C is an exemplary schematic diagram of a first antenna array provided according to an embodiment of the present disclosure.

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

[0029] FIG3A is a schematic diagram of an exemplary flow chart of a communication method provided according to an embodiment of the present disclosure.

[0030] FIG3B is a schematic diagram of an exemplary flow chart of a communication method provided according to an embodiment of the present disclosure.

[0031] FIG4A is a schematic diagram of an exemplary flow chart of a communication method provided according to an embodiment of the present disclosure.

[0032] FIG4B is a schematic diagram of an exemplary flow chart of a communication method provided according to an embodiment of the present disclosure.

[0033] FIG5 is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0034] FIG6 is a schematic diagram of an exemplary flow chart of a communication method provided according to an embodiment of the present disclosure.

[0035] FIG7A is a schematic diagram of an exemplary structure of a terminal provided according to an embodiment of the present disclosure.

[0036] FIG7B is a schematic diagram of an exemplary structure of a network device provided according to an embodiment of the present disclosure.

[0037] FIG8A is a schematic diagram of an exemplary structure of a communication device provided according to an embodiment of the present disclosure.

[0038] FIG8B is a schematic diagram of an exemplary structure of a communication device provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication system, and a storage medium.

[0040] In a first aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

[0041] The terminal determines a first codeword in a first codebook, where the first codebook is constructed based on an angle parameter and a distance parameter, and the first codebook is a codebook used when the terminal is in a near-field area of ​​a first antenna array, where the first antenna array is an antenna array used by the network device to transmit wireless signals to the terminal.

[0042] The terminal sends first information to the network device, where the first information is used to indicate an angle parameter and a distance parameter corresponding to the first codeword.

[0043] In the above embodiment, a first codebook for the near-field area can be constructed based on the angle parameters and the distance parameters, so that the terminal can determine the corresponding first codeword when in the near-field area, and feedback the angle parameters and distance parameters corresponding to the first codeword to the network device through the first information, so that the first codeword determined by the terminal can better match the wireless propagation characteristics of the near-field area, thereby improving the transmission performance of the near-field area.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the first antenna array is any one of the following: a uniform linear array; a uniform planar array.

[0045] In the above embodiment, the first codebook can be applied to a uniform linear array or a uniform planar array antenna array, thereby enabling a terminal located in such an antenna array to achieve more reliable near-field transmission based on the first codebook.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1, and N2 is greater than or equal to 1.

[0047] In the above embodiment, the first codebook can be applied to an antenna array including an antenna port number greater than or equal to 1 in the horizontal dimension and the vertical dimension, thereby enabling a terminal located in such an antenna array to achieve more reliable near-field area transmission based on the first codebook.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the angle parameter includes at least one of the following: a first angle domain parameter of the near-field area in the horizontal dimension; a second angle domain parameter of the near-field area in the vertical dimension.

[0049] In the above embodiment, the first codebook can be constructed based on the angle parameters of the horizontal dimension and the angle parameters of the vertical dimension, respectively, so that the first antenna array can achieve better near-field transmission performance in both the horizontal dimension and the vertical dimension.

[0050] In combination with some embodiments of the first aspect, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension; the n′1th element of the first basis vector v for:

[0051] The n′2th element of the second basis vector u for:

[0052] Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; represents the first angle domain parameter corresponding to the codeword in the first codebook, represents the second angle domain parameter corresponding to the codeword in the first codebook, r represents the distance parameter corresponding to the codeword in the first codebook, -1≤cosθ≤1, the distance parameter corresponding to the codeword in the first codebook satisfies at least one of the following: and in, j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0053] In the embodiment of the present disclosure, based on the above formula and the angle parameter and distance parameter of the horizontal dimension and the angle parameter and distance parameter of the vertical dimension, the codewords corresponding to the respective angle parameters and the respective distance parameters in the first codebook can be accurately determined, and then the corresponding first codebook can be constructed, so that the antenna radiation pattern gain is large and the near-field transmission performance can be ensured.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following: first indication information, the first indication information is used to indicate the first angle domain parameter corresponding to the first codeword; second indication information, the second indication information is used to indicate the second angle domain parameter corresponding to the first codeword; third indication information, the third indication information is used to indicate the distance parameter corresponding to the first codeword.

[0055] In the embodiment of the present disclosure, the terminal can implement feedback of the first codeword based on the first information, and the network device can obtain the first codeword determined by the terminal based on the first information, which can ensure that the first antenna array can perform near-field transmission based on the first codeword.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the angle parameter includes N101 angle sampling points obtained by quantizing a first angle domain parameter of the near-field area in a horizontal dimension, and / or N202 angle sampling points obtained by quantizing a second angle domain parameter of the near-field area in a vertical dimension;

[0057] The distance parameters include N303 distance sampling points obtained by quantizing a first distance domain parameter of the near-field area in a horizontal dimension, and / or N404 distance sampling points obtained by quantizing a second distance domain parameter of the near-field area in a vertical dimension;

[0058] Among them, N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

[0059] In the disclosed embodiment, the angle parameter and the distance parameter can be quantized in the horizontal dimension and the vertical dimension, respectively, and a first codebook is constructed based on the quantized sampling points. Continuous angle parameters and distance parameters can be quantized into discrete sampling points, effectively reducing the number of codewords in the first codebook and reducing the resource overhead and power consumption of the terminal in determining the first codeword.

[0060] In combination with some embodiments of the first aspect, in some embodiments, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension; the n′1th element of the first basis vector v for:

[0061] The n′2th element of the second basis vector u for:

[0062] Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2;

[0063] l represents the angle sampling point index of the horizontal dimension corresponding to the codeword in the first codebook, m represents the angle sampling point index of the vertical dimension corresponding to the codeword in the first codebook, o1 represents the distance sampling point index of the horizontal dimension corresponding to the codeword in the first codebook, o2 represents the distance sampling point index of the vertical dimension corresponding to the codeword in the first codebook, l=0, 1, ..., N1O1-1, m=0, 1, ..., N2O2-1, o1=1, 2, ..., N3O3, o2=1, 2, ..., N4O4;

[0064] j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0065] In the embodiment of the present disclosure, based on the above formula and possible values ​​of each sampling point, the codeword corresponding to each angle sampling point and each distance sampling point can be determined, and then the corresponding first codebook can be constructed.

[0066] In combination with some embodiments of the first aspect, in some embodiments, the index of the antenna port of the first antenna array satisfies the following conditions: n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}; n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2}.

[0067] In conjunction with some embodiments of the first aspect, in some embodiments, an initial phase of a basis vector in the first codebook is zero;

[0068] The n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0069] In the above embodiment, the terms irrelevant to n′1 in the formula can be removed, which can effectively reduce the complexity of codebook determination.

[0070] In combination with some embodiments of the first aspect, in some embodiments, the antenna spacings in the horizontal and vertical dimensions of the first antenna array are both and

[0071] The n′1th element of the first basis vector v for:

[0072] The n′2th element of the second basis vector u for:

[0073] In combination with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following: a first indication field, the first indication field is used to indicate the angle sampling point index of the horizontal dimension of the first codeword; a second indication field, the second indication field is used to indicate the angle sampling point index of the vertical dimension of the first codeword; a third indication field, the third indication field is used to indicate the distance sampling point index of the horizontal dimension of the first codeword; and a fourth indication field, the fourth indication field is used to indicate the distance sampling point index of the vertical dimension of the first codeword.

[0074] In the above embodiment, the terminal can accurately report the angle sampling points and distance sampling points of the horizontal dimension and / or vertical dimension corresponding to the first codeword through the first information, so that the network device can accurately obtain the first codeword determined by the terminal based on the first information, and perform near-field transmission based on the first codeword, which can effectively improve the reliability of near-field transmission.

[0075] In conjunction with some embodiments of the first aspect, in some embodiments, the first indication field at least includes bits; the second indication field includes at least bits; the third indication field includes at least bits; the fourth indication field includes at least bits.

[0076] In the above embodiment, the smallest indication field can be used to implement various parameter indications, which can effectively reduce the resource overhead of the first code feedback.

[0077] In combination with some embodiments of the first aspect, in some embodiments, the first codebook is used for single-polarization single-layer transmission; or, the first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on the angle parameter, the distance parameter, and the common phase coefficient.

[0078] In the above embodiment, the first codebook can be used for single-polarization single-layer transmission or dual-polarization multi-layer transmission. If dual-polarization multi-layer transmission is considered, a common phase coefficient between polarization directions can be introduced.

[0079] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0080] The terminal sends second information to the network device, where the second information is used to indicate a common phase coefficient corresponding to the first codeword.

[0081] In the above embodiment, the terminal can indicate the common phase coefficient by sending the second information, so that the network device can more accurately determine the first codeword based on the first information and the second information, thereby further ensuring the quality of communication.

[0082] In combination with some embodiments of the first aspect, in some embodiments, the common phase coefficient includes at least one of the following: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK) and 8-phase shift keying (8-PSK).

[0083] In a second aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

[0084] The network device receives first information sent by the terminal, where the first information is used to indicate an angle parameter and a distance parameter corresponding to a first codeword, where the first codeword is a codeword in the first codebook, and the first codebook is constructed based on the angle parameter and the distance parameter. The first codebook is a codebook used when the terminal is in the near-field area of ​​the first antenna array, and the first antenna array is an antenna array used by the network device to transmit a wireless signal to the terminal.

[0085] In combination with some embodiments of the second aspect, in some embodiments, the first antenna array is any one of the following: a uniform linear array; a uniform planar array.

[0086] In combination with some embodiments of the second aspect, in some embodiments, the number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1, and N2 is greater than or equal to 1.

[0087] In combination with some embodiments of the second aspect, in some embodiments, the angle parameter includes at least one of the following: a first angle domain parameter of the near-field area in the horizontal dimension; a second angle domain parameter of the near-field area in the vertical dimension.

[0088] In conjunction with some embodiments of the second aspect, in some embodiments, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension; the n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for: Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; represents the first angle domain parameter corresponding to the codeword in the first codebook, represents the second angle domain parameter corresponding to the codeword in the first codebook, r represents the distance parameter corresponding to the codeword in the first codebook, The distance parameter corresponding to the codeword in the first codebook satisfies at least one of the following: and in, j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0089] In combination with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following: first indication information, the first indication information is used to indicate the first angle domain parameter corresponding to the first codeword; second indication information, the second indication information is used to indicate the second angle domain parameter corresponding to the first codeword; third indication information, the third indication information is used to indicate the distance parameter corresponding to the first codeword.

[0090] In conjunction with some embodiments of the second aspect, in some embodiments, the angle parameter includes N101 angle sampling points obtained by quantizing a first angle domain parameter of the near-field area in a horizontal dimension, and / or N202 angle sampling points obtained by quantizing a second angle domain parameter of the near-field area in a vertical dimension;

[0091] The distance parameters include N303 distance sampling points obtained by quantizing a first distance domain parameter of the near-field area in a horizontal dimension, and / or N404 distance sampling points obtained by quantizing a second distance domain parameter of the near-field area in a vertical dimension;

[0092] Among them, N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

[0093] In conjunction with some embodiments of the second aspect, in some embodiments, the n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for: Among them, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; l represents the angle sampling point index of the horizontal dimension corresponding to the codeword in the first codebook, m represents the angle sampling point index of the vertical dimension corresponding to the codeword in the first codebook, o1 represents the distance sampling point index of the horizontal dimension corresponding to the codeword in the first codebook, o2 represents the distance sampling point index of the vertical dimension corresponding to the codeword in the first codebook, l=0,1,…,N1O1-1, m=0,1,…,N2O2-1, o1=1,2,…,N3O3, o2=1,2,…,N4O4; j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0094] In combination with some embodiments of the second aspect, in some embodiments, the index of the antenna port of the first antenna array satisfies the following conditions: n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}; n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2}.

[0095] In conjunction with some embodiments of the second aspect, in some embodiments, an initial phase of a basis vector in the first codebook is zero;

[0096] The n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0097] In combination with some embodiments of the second aspect, in some embodiments, the antenna spacings in the horizontal and vertical dimensions of the first antenna array are both and The n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0098] In combination with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following: a first indication field, the first indication field is used to indicate the angle sampling point index of the horizontal dimension of the first codeword; a second indication field, the second indication field is used to indicate the angle sampling point index of the vertical dimension of the first codeword; a third indication field, the third indication field is used to indicate the distance sampling point index of the horizontal dimension of the first codeword; and a fourth indication field, the fourth indication field is used to indicate the distance sampling point index of the vertical dimension of the first codeword.

[0099] In conjunction with some embodiments of the second aspect, in some embodiments, the first indication field at least includes bits; the second indication field includes at least bits; the third indication field includes at least bits; the fourth indication field includes at least bits.

[0100] In combination with some embodiments of the second aspect, in some embodiments, the first codebook is used for single-polarization single-layer transmission; or, the first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on the angle parameter, the distance parameter, and the common phase coefficient.

[0101] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: the terminal sending second information to the network device, where the second information is used to indicate a common phase coefficient corresponding to the first codeword.

[0102] In combination with some embodiments of the second aspect, in some embodiments, the common phase coefficient includes at least one of the following: binary phase shift keying BPSK, quadrature phase shift keying QPSK and eight-phase phase shift keying 8-PSK.

[0103] In a third aspect, an embodiment of the present disclosure proposes a terminal, comprising: a processing module for determining a first codeword in a first codebook, the first codebook being constructed based on an angle parameter and a distance parameter, the first codebook being a codebook used when the terminal is in a near-field area of ​​a first antenna array, the first antenna array being an antenna array for the network device to transmit a wireless signal to the terminal; a transceiver module for sending first information to the network device, the first information being used to indicate the angle parameter and distance parameter corresponding to the first codeword.

[0104] In a fourth aspect, an embodiment of the present disclosure proposes a network device, comprising: a transceiver module for receiving first information sent by a terminal, the first information being used to indicate an angle parameter and a distance parameter corresponding to a first codeword, the first codeword being a codeword in the first codebook, the first codebook being constructed based on the angle parameter and the distance parameter, the first codebook being a codebook used when the terminal is in the near-field area of ​​the first antenna array, and the first antenna array being an antenna array for the network device to transmit a wireless signal to the terminal.

[0105] In a fifth aspect, an embodiment of the present disclosure proposes a terminal comprising: one or more processors; a memory coupled to the one or more processors, the memory comprising executable instructions, which, when executed by the one or more processors, enables the terminal to execute the communication method in the first aspect.

[0106] In the sixth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; a memory coupled to the one or more processors, the memory comprising executable instructions, which, when executed by the one or more processors, enables the network device to execute the communication method in the second aspect.

[0107] 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 optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0108] 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 optional implementation of the first and second aspects.

[0109] In a 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 optional implementation of the first and second aspects.

[0110] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0111] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0112] It is understandable that the above-mentioned 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.

[0113] The present disclosure provides a communication method, terminal, network device, communication system, and storage medium. In some embodiments, the terms "communication method" and "codebook determination method" and "codeword reporting method" are interchangeable; the terms "communication device" and "codebook determination device" and "codeword reporting device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0119] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] In some embodiments, terms such as "time / frequency" and "time / frequency domain" refer to the time domain and / or the frequency domain.

[0125] 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.

[0126] 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.

[0127] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0128] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0129] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / 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)" and the like may be used interchangeably.

[0130] In some embodiments, the terms "terminal", "terminal device", "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. can be used interchangeably.

[0131] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0132] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0133] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0134] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0135] 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.

[0136] FIG1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure (a system diagram including only the subjects related to the invention point and their important opposite sides, and the number of subjects corresponds to the number of subjects involved in the invention point).

[0137] As shown in Figure 1A, a 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] In some embodiments, the core network device may be a single device including a first network element, a second network element, etc., or may be a plurality of devices or a group of devices, each including all or part of the first network element, the second network element, etc. 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).

[0143] 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.

[0144] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or a portion thereof, but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system may include all or part of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities may be 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.

[0145] 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).

[0146] In some embodiments, network device 102 may be a network device in an extra large scale massive multiple input multiple output (XL-MIMO) system. Network device 102 may include a first antenna array, which may be used to transmit wireless signals from the network device to a terminal. Optionally, the type of the first antenna array may include, but is not limited to, a uniform linear array or a uniform planar array.

[0147] In some embodiments, the radiation range of the antenna array can be divided into a near-field region and a far-field region, the boundaries of which can be represented by a Rayleigh distance, and the Rayleigh distance is proportional to the antenna aperture and carrier frequency of the antenna array.

[0148] FIG1B is a schematic diagram of a first antenna array according to an exemplary embodiment. As shown in FIG1B , the first antenna array can be modeled on the x-axis of a two-dimensional Cartesian coordinate system, including 7 antenna ports in the horizontal dimension, and the spacing between the 7 antenna ports is the same, that is, the first antenna array is a uniform linear array with N1 equal to 7 and N2 equal to 1, and the spacing between each antenna port can be d x Taking the antenna port with the horizontal dimension index of 0 in the first antenna array as the origin (0, 0), the coordinates of the antenna port with the horizontal dimension index of n1 can be (n1d x ,0), where n1 is an integer and satisfies n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}. The horizontal dimension length of the antenna array is D x , which can be expressed as D x =N1d x or D x =(N1-1)d x .

[0149] If a terminal is located in the xy plane of the two-dimensional Cartesian coordinate system, the distance between the terminal and the origin is r, and the angle between the terminal and the positive direction of the x-axis is θ, and 0≤θ≤π. In this example, the equivalent antenna aperture in the horizontal dimension of the antenna array is When the terminal is located in the xy two-dimensional plane, the Rayleigh distance can be calculated as In this way, when the distance between the terminal and the first antenna array is less than or equal to the Rayleigh distance, it can be determined that the terminal is located in the near field area; otherwise, it can be determined that the terminal is in the far field area.

[0150] The distance between the antenna port indexed as n1 in the first antenna array and the terminal can be calculated as: According to Taylor's formula, the above formula is approximated by a second-order Taylor expansion. Therefore, the distance between the antenna with index n1 in the antenna array and the UE can be approximately calculated as:

[0151] The single-polarization array response vector of the first antenna array can be calculated as:

[0152] FIG1C is a schematic diagram of a first antenna array according to an exemplary embodiment. As shown in FIG1C , the first antenna array can be modeled on the xy plane of a three-dimensional Cartesian coordinate system. The antenna array has 21 antenna ports, wherein the number of antenna ports in the horizontal dimension is 7 and the number of antenna ports in the vertical dimension is 3. The spacing between the antenna ports in their respective dimensions is the same, that is, the first antenna array is a uniform array with N1 equal to 7 and N2 equal to 3, wherein the spacing between the antenna ports in the horizontal dimension can be d x , the vertical spacing between antenna ports can be d z Taking the antenna port with the horizontal and vertical indexes of 0 in the first antenna array as the origin (0, 0, 0), the coordinates of the antenna with the horizontal and vertical indexes (n1, n2) in the antenna array are (n1d x ,0,n2d z ), where n1 and n2 are integers and satisfy n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2} and n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2}.

[0153] If a terminal is located in the xyz space of the three-dimensional Cartesian coordinate system, the distance between the terminal and the origin is r, the angle between the terminal and the positive direction of the x-axis is θ and 0≤θ≤π, and the angle between the terminal and the positive direction of the z-axis is and According to the geometric relationship, we can get In this example, the equivalent antenna aperture in the horizontal dimension of the antenna array is The equivalent antenna aperture in the vertical dimension is When the terminal is located in the xyz three-dimensional space, the horizontal dimension Rayleigh distance can be calculated as The Rayleigh distance in the vertical dimension can be calculated as In this way, when the distance between the terminal and the first antenna array in the horizontal dimension and / or the vertical dimension is less than or equal to the Rayleigh distance, it can be determined that the terminal is located in the near field area.

[0154] The distance between the antenna port indexed by (n1, n2) in the first antenna array and the terminal can be calculated as: According to Taylor's formula, the above formula is approximated by a second-order Taylor expansion. Therefore, the distance between the antenna indexed (n1, n2) in the antenna array and the terminal can be approximately calculated as:

[0155] The single-polarization array response vector of the first antenna array can be calculated as:

[0156] In some embodiments, only the far-field region is considered, and the channel model and codebook design are both tailored to far-field MIMO. However, with the substantial increase in antenna array size and frequency band, the Rayleigh distance increases to a certain extent, making it easier for terminals in the communication system to enter the near-field region of the antenna array. In the near-field region, electromagnetic waves propagate as spherical waves, while in the far-field region, electromagnetic waves propagate as plane waves. Therefore, codebook designs designed for the far-field region cannot guarantee the quality of communication in the near-field region.

[0157] It is worth noting that the first antenna arrays shown in Figures 1B and 1C are exemplary only. The number of antenna ports in the first antenna array may be smaller or larger than that shown in Figures 1B or 1C, and this is not limited in the present disclosure. For example, the first antenna array may have 64 ports in both the horizontal and vertical dimensions.

[0158] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a communication method, and the method includes:

[0159] Step S2101: The terminal determines a first codeword in a first codebook.

[0160] In some embodiments, the first codebook is a codebook used when the terminal is in a near-field area of ​​the first antenna array.

[0161] In some embodiments, the terminal determines a first codeword in a first codebook. Optionally, the terminal determines the first codeword in the first codebook based on a measurement result. Optionally, the terminal determines, based on the measurement result, that the terminal is in a near-field region of a first antenna array, and determines the first codeword in the first codebook.

[0162] For example, the terminal can first receive a channel state information reference signal (CSI-RS) sent by a network device, and perform channel estimation based on the CSI-RS to determine whether it is in the near-field area. The terminal can then traverse each codeword in the first codebook to obtain the optimal first codeword.

[0163] It is understood that the near-field area of ​​the first antenna array may refer to a relatively close distance between the terminal and the antenna array. For example, when the distance between the terminal and the antenna array in the horizontal dimension and / or the vertical dimension is less than or equal to the Ruili distance, the terminal may be determined to be in the near-field area of ​​the first antenna array.

[0164] In some embodiments, the first antenna array is an antenna array used by a network device to transmit wireless signals to a terminal. For example, the network device may precode data in a data stream based on codewords in a first codebook, so that the wireless signals transmitted by the network device can be accurately and reliably received by a terminal in a near-field area.

[0165] In some embodiments, the first codebook is constructed based on the angle parameter and the distance parameter. Optionally, the terminal determines the angle parameter and the distance parameter corresponding to the first codeword in the first codebook.

[0166] Among them, the angle parameter may include various angles of the near-field area of ​​the first antenna array in the angle domain, the distance parameter may include various distances of the near-field area of ​​the first antenna array in the distance domain, and the first codebook may be a set of codewords corresponding to various angles and various distances, that is, the first codebook can be constructed according to the codewords corresponding to various angles and various distances.

[0167] Optionally, the first codebook includes multiple codewords corresponding to various angles and distances in the near-field region. Optionally, each codeword in the first codebook corresponds to a different angle parameter and / or distance parameter. Optionally, at least one of the distance parameter and the angle parameter of any two codewords in the first codebook is different.

[0168] In some embodiments, the first antenna array may be any one of the following: a uniform linear array; a uniform planar array. Optionally, the first antenna array may also be a triangular array or a circular array, which is not limited in the present embodiment.

[0169] In some embodiments, the number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1, and N2 is greater than or equal to 1.

[0170] Among them, the uniform linear array can be regarded as a special uniform planar array, that is, the uniform linear array can be a uniform planar array with 1 antenna port in the horizontal dimension or the vertical dimension.

[0171] It can be understood that when N1 or N2 is equal to 1 and the spacing between the antenna ports is the same, the first antenna array can be a uniform linear array. When N1 and / or N2 is greater than 1 and the spacing between the antenna ports is the same, the first antenna array can be a uniform planar array. The spacing between the antenna ports in the horizontal dimension can be expressed as d x , the spacing in the vertical dimension can be expressed as d z , the horizontal dimension length of the antenna array can be expressed as D x , where D x =N1d x or D x=(N1-1)d x , or other representations, which are not limited in the present disclosure. The vertical dimension length of the antenna array can be expressed as D z , where D z =N2d z or D z =(N2-1)d z , or other representations are possible, which are not limited in the embodiments of the present disclosure.

[0172] In some embodiments, the angle parameter includes at least one of the following: a first angle domain parameter of the near-field region in the horizontal dimension; and a second angle domain parameter of the near-field region in the vertical dimension. Alternatively, the distance parameter includes a first distance parameter in the horizontal dimension and a second distance parameter in the vertical dimension, wherein the first distance parameter and the second distance parameter may have different value ranges.

[0173] Optionally, the first angle domain parameter may refer to a set of possible values ​​in the horizontal dimension angle domain when the terminal is in the near field area, and the second angle domain parameter may refer to a set of possible values ​​in the vertical dimension angle domain when the terminal is in the near field area.

[0174] 1C, the terminal may be located in the xyz space of a three-dimensional Cartesian coordinate system, and the first angle domain parameter corresponding to the first angle domain parameter of the first antenna array in the horizontal dimension may include cosθ or Any possible value, the second angle domain parameter in the vertical dimension can include Any possible value. If the terminal is in the near field area, the distance r between the terminal and the origin in the horizontal dimension is less than or equal to and / or, in a vertical dimension less than Accordingly, the distance parameter may include any possible value of r within the range.

[0175] It can be understood that when N2 in the first antenna array is equal to 1, that is, when the first antenna array is a uniform linear array, the second angle domain parameter of the first antenna array in the vertical dimension has only one value, that is, The value of includes only 90 degrees. Accordingly, the angle parameters corresponding to the antenna array may include only the first angle domain parameters. For example, when constructing the first codebook, only the first angle parameter of the horizontal dimension may be considered, and the second angle domain parameter of the vertical dimension may not be considered.

[0176] For example, referring to FIG1B , the terminal may be located in the xy plane of a two-dimensional Cartesian coordinate system, and the first angle domain parameter of the first antenna array in the horizontal dimension may include cosθ or Any possible value. If the terminal is in the near field area, the distance r between the terminal and the origin is less than or equal to Accordingly, the distance parameter may include any possible value of r within the range.

[0177] In some embodiments, the basis vectors of the first codebook include first basis vectors in a horizontal dimension and second basis vectors in a vertical dimension.

[0178] Optionally, the basis vector of the first codebook may be the Kronecker product of the first basis vector and the second basis vector. For example, the basis vector of the first codebook may be expressed as

[0179] In some embodiments, the n′1th element of the first basis vector v in the horizontal dimension of the basis vectors of the first codebook is for:

[0180] The n′2th element of the second basis vector u in the vertical dimension of the basis vectors of the first codebook for:

[0181] Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; represents the first angle domain parameter corresponding to the codeword in the first codebook, represents the second angle domain parameter corresponding to the codeword in the first codebook, r represents the distance parameter corresponding to the codeword in the first codebook, -1≤cosθ≤1, the distance parameter corresponding to the codeword in the first codebook satisfies at least one of the following: and in, j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0182] For example, the value range of the first angle domain parameter and the second angle domain parameter is [-1, 1], and the value range of the distance parameter in the horizontal dimension of the near field area can be The range of values ​​in the vertical dimension can be

[0183] It can be understood that the first basis vector v can be used to represent the component of the basis vector of the first codebook in the horizontal dimension, and the second basis vector u can be used to represent the component of the basis vector of the first codebook in the vertical dimension. Based on the above formula, the codeword corresponding to each first angle domain parameter, each second angle domain parameter, and each distance parameter in the horizontal dimension and the distance dimension can be determined, thereby constructing the first codebook.

[0184] It is worth noting that when the first antenna array is a uniform linear array, the number of antenna ports in the vertical dimension can be 1, and the value of the index n2 of the first antenna port in the vertical dimension can only be 0, that is, the second basis vector in the vertical dimension is 1. In this way, the second angle domain parameter and the second basis vector can be ignored. Furthermore, when the first antenna array is a uniform linear array, only whether the terminal is in the near field area in the horizontal dimension may be considered.

[0185] That is, only when the terminal is in the near field area in the horizontal dimension or the first antenna array is a uniform linear array, the n′1th element of the first basis vector v in the horizontal dimension of the basis vector of the first codebook used by the terminal is for: The basis vector of the vertical dimension is 1; where -1≤cosθ≤1,

[0186] In some of the above optional embodiments, the first angle domain parameter, the second angle domain parameter, and the distance parameter are all within a continuous value range, which results in an excessive number of codewords in the first codebook and excessive resource overhead.

[0187] In this regard, in some embodiments, the angle parameter and the distance parameter may be quantized in the vertical dimension and the horizontal dimension respectively. For example, the first angle parameter, the second angle parameter, the first distance parameter and the second distance parameter may be quantized respectively.

[0188] For example, the total number of sampling points corresponding to each parameter may be predetermined, and quantization may be performed based on the total number of sampling points corresponding to each parameter. Alternatively, sampling parameters corresponding to each parameter may be predefined, and quantization may be performed based on the sampling parameters corresponding to each parameter. The sampling parameters may include, for example, the number of sampling points and an oversampling factor.

[0189] In some embodiments, the angle parameters include N101 angle sampling points obtained by quantizing a first angle domain parameter of the near-field region in the horizontal dimension, and / or N202 angle sampling points obtained by quantizing a second angle domain parameter of the near-field region in the vertical dimension;

[0190] The distance parameters include N3O3 distance sampling points obtained by quantizing a first distance domain parameter of the near field area in the horizontal dimension, and / or N4O4 distance sampling points obtained by quantizing a second distance domain parameter of the near field area in the vertical dimension;

[0191] Among them, N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension. Optionally, the sampling points of the angle parameter in the horizontal dimension can be a subset of the set of possible values ​​in the horizontal dimension angle domain when the terminal is in the near field area; the sampling points of the angle parameter in the vertical dimension can be a subset of the set of possible values ​​in the vertical dimension angle domain when the terminal is in the near field area.

[0192] Optionally, the first distance domain parameter may refer to a set of possible values ​​of the horizontal dimension of the terminal in the near field area, and the sampling point of the distance parameter in the horizontal dimension may be a subset of this set. The second distance domain parameter may refer to a set of possible values ​​of the vertical dimension of the terminal in the near field area, and the sampling point of the distance parameter in the vertical dimension may be a subset of this set.

[0193] Optionally, whether the angle parameter includes the angle sampling point in the vertical dimension, or whether the distance parameter includes the distance sampling point in the vertical dimension can be determined according to the type of the first antenna array. For example, when the first antenna array is a uniform linear array, the angle parameter may not include the second angle domain parameter in the vertical dimension, and there is no need to sample the second angle domain parameter.

[0194] It is understood that quantizing the above parameters may refer to sampling the above continuous parameters to obtain a set of corresponding discrete sampling points. For example, quantizing the first angle domain may refer to sampling the cosθ or The possible values ​​of are sampled to obtain N1O1 angle sampling points.

[0195] Among them, the values ​​of O1, O2, O3 and O4 can be calibrated according to the accuracy requirements of the first codebook, for example, they can all be 1 or all be 3, etc., and the embodiments of the present disclosure are not limited to this. The higher the values, the higher the codeword accuracy in the corresponding first codebook.

[0196] For example, the first antenna array is a uniform linear array, the angle parameter includes N101 angle sampling points obtained by quantizing cosθ, and the distance parameter includes N303 distance sampling points obtained by quantizing the first distance domain parameter.

[0197] For the codeword whose horizontal dimension angle sampling point index is l and horizontal dimension distance sampling point index is o1 in the first codebook, when The first angle domain parameter corresponding to the codeword is when The first angle parameter corresponding to the codeword is The first distance domain parameter corresponding to the codeword is

[0198] In another example, the first antenna array is a uniform array, and the angle parameters include The N1O1 angle sampling points obtained by quantization and the The N2O2 angle sampling points obtained by quantization, and the distance parameters include N3O3 distance sampling points obtained by quantizing the first distance domain parameter and N3O3 distance sampling points obtained by quantizing the second distance domain parameter.

[0199] For the codeword with the horizontal dimension angle sampling point index of l, the vertical dimension angle sampling point index of m, the horizontal dimension distance sampling point index of o1 and the vertical dimension distance sampling point index of o2 in the first codebook, when The first angle domain parameter corresponding to the codeword is when The first angle domain parameter corresponding to the codeword is when The second angle domain parameter corresponding to the codeword is when The second angle domain parameter corresponding to the codeword is The first distance domain parameter corresponding to the codeword is The second distance domain parameter corresponding to the codeword is

[0200] In some embodiments, the indexes of the antenna ports of the first antenna array satisfy the following conditions: n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}; n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2}. In the first antenna array, taking the example of an odd number of antenna ports in both the horizontal and vertical dimensions, the index of the antenna port at the center of the horizontal dimension is 0, the index of the antenna port at the center of the vertical dimension is 0, the value range of n′1 is 1 to an integer less than N1, and the value range of n′2 is 1 to an integer less than N2.

[0201] In some embodiments, the initial phase of the basis vectors in the first codebook is zero. The initial phases of the first basis vectors and the second basis vectors in the first codebook may both be zero.

[0202] Furthermore, since the following conditions are satisfied, n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2} and n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2} and n′1=n1+(N1+1) / 2 and n′2=n2+(N2+1) / 2, it is possible to remove the terms that are irrelevant to n′1 and n′2, and thus determine the n′1th element of the first basis vector v in the horizontal dimension in the basis vectors of the first codebook for: The n′2th element of the second basis vector u in the vertical dimension of the basis vectors of the first codebook for:

[0203] In some embodiments, the antenna spacings in the horizontal and vertical dimensions of the first antenna array are both and The n′1th element of the first basis vector v in the horizontal dimension of the basis vectors of the first codebook for: The n′2th element of the second basis vector u in the vertical dimension of the basis vectors of the first codebook for:

[0204] It can be understood that, in the above embodiment, if the first antenna array is a uniform linear array, the second basis vector of the first codebook in the vertical dimension in the above embodiment is 1, and the construction of the first codebook does not require the participation of the angle parameter and / or distance parameter in the vertical dimension.

[0205] In some embodiments, the first codebook may be used for single-polarization single-layer transmission. Alternatively, the first codebook may also be used for dual-polarization multi-layer transmission.

[0206] It is understandable that if the first codebook considers dual-polarization multi-layer transmission, a co-phase coefficient between polarization directions may be introduced, such as a QPSK co-phase coefficient {1, -1, j, -j}.

[0207] Optionally, when the first codebook is used for dual-polarization multi-layer transmission, the first codebook may be constructed based on the angle parameter, the distance parameter, and the co-phase coefficient. For example, a codebook for single-polarization single-layer transmission may be constructed based on the angle parameter and the distance parameter in any of the foregoing embodiments, and the codebook may be further processed based on the co-phase coefficient to obtain the first codebook for dual-polarization multi-layer transmission.

[0208] In some embodiments, the common phase coefficient includes at least one of: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), and octal phase shift keying (8-PSK).

[0209] In some embodiments, the near-field codebook is used for single-polarization single-layer transmission; or, the near-field codebook is used for dual-polarization multi-layer transmission. The near-field codebook can be constructed based on the first basis vector, the second basis vector and the co-phase coefficient, or the angle parameter, the distance parameter and the co-phase coefficient.

[0210] Among them, in the case of dual-polarization multi-layer transmission, in the case of QPSK, the common phase coefficient can be any one of the four values ​​[1, -1, j, -j], in the case of BPSK, the common phase coefficient can be any one of the values ​​[1, -1], and in the case of 8PSK, the common phase coefficient can be Optionally, the near-field codebook may include a codeword constructed based on each angle parameter, each distance parameter, and each common phase coefficient.

[0211] In some embodiments, the first codeword may be the optimal codeword for the terminal in the first codebook constructed by any of the above embodiments, wherein the optimal codeword for the terminal may be the codeword corresponding to the location of the terminal.

[0212] For example, the angle parameter corresponding to the first codeword can be used to indicate the angle domain information of the terminal relative to the first antenna array, and the distance parameter corresponding to the first codeword can be used to indicate the distance domain information of the terminal relative to the first antenna array.

[0213] Step S2102: The terminal sends first information to the network device.

[0214] In some embodiments, the first information is used to indicate the first codeword. Optionally, the first information is used to indicate an angle parameter and a distance parameter corresponding to the first codeword.

[0215] In some embodiments, the angle parameter and the distance parameter corresponding to the first codeword may be the angle parameter and the distance parameter corresponding to the optimal codeword obtained by the terminal by traversing each codeword in the first codebook.

[0216] In some embodiments, the first information includes at least one of the following: first indication information, the first indication information is used to indicate the first angle domain parameter corresponding to the first codeword; second indication information, the second indication information is used to indicate the second angle domain parameter corresponding to the first codeword; third indication information, the third indication information is used to indicate the distance parameter corresponding to the first codeword.

[0217] Optionally, the network device may determine the first codeword according to one or more of the first indication information, the second indication information, and the third indication information.

[0218] The first codebook may be constructed based on at least one of the first angle domain parameter and the second angle parameter, and a distance parameter.

[0219] It is understandable that the first angle domain parameter and / or the second angle domain parameter corresponding to the first codeword can be any value in [-1, 1], and the distance parameter corresponding to the first codeword can be or Any value in .

[0220] For example, when the first angle domain parameter indicated by the first indication information is 0, the network device may determine that the terminal is located in the xy plane in the Cartesian coordinate system corresponding to the first antenna array.

[0221] In some embodiments, the first information includes at least one of the following: a first indication field, the first indication field is used to indicate the angle sampling point index of the horizontal dimension of the first codeword; a second indication field, the second indication field is used to indicate the angle sampling point index of the vertical dimension of the first codeword; a third indication field, the third indication field is used to indicate the distance sampling point index of the horizontal dimension of the first codeword; and a fourth indication field, the fourth indication field is used to indicate the distance sampling point index of the vertical dimension of the first codeword.

[0222] Optionally, the network device determines the first codeword according to at least one of the first indicator field, the second indicator field, the third indicator field, and the fourth indicator field.

[0223] The first codebook may be constructed based on at least one of the quantized first angle domain parameter and the quantized second angle parameter, and the quantized distance parameter.

[0224] Optionally, the angle sampling point index of the horizontal dimension of the first codeword can be any integer in [0, N1O1-1], the angle sampling point index of the vertical dimension can be any integer in [0, N2O2-1], the distance sampling point index of the horizontal dimension of the first codeword can be any integer in [0, N3O3-1], and the distance sampling point index of the vertical dimension can be any integer in [0, N4O4-1].

[0225] In some embodiments, the first indication field includes at least bits; the second indication field includes at least bits; the third indication field includes at least bits; the fourth indication field includes at least In this way, the sampling point index can be reported using the minimum number of bits.

[0226] In some embodiments, a network device receives first information. Optionally, the network device determines a first codeword based on the first information. Optionally, the network device determines an angle parameter and a distance parameter corresponding to the first information based on the first information. Optionally, the network device determines the first codeword based on the angle parameter and the distance parameter indicated by the first information.

[0227] In some embodiments, the first information may be “codeword indication information”, “feedback indication”, “codeword information”, etc. The embodiment of the present disclosure does not limit the name of the first information.

[0228] Step S2103: The terminal sends second information to the network device.

[0229] In some embodiments, the second information is used to indicate a common phase coefficient corresponding to the first codeword.

[0230] In some embodiments, the second information is used to indicate that the first codeword is used for dual-polarization multi-layer transmission. Optionally, the second information is used to indicate that the codebook corresponding to the first codeword is used for dual-polarization multi-layer transmission. In some embodiments, the second information may include N bits, where N is used to indicate a common phase coefficient. For example, when N is 1, the second information is used to indicate that the common phase coefficient corresponding to the first codeword is BPSK; when N is 2, the second information is used to indicate that the common phase coefficient corresponding to the first codeword is QPSK; and when N is 3, the second information is used to indicate that the common phase coefficient corresponding to the first codeword is 8-PSK.

[0231] It can be understood that if it is QPSK, the common phase coefficient corresponding to the first codeword can be any one of the four values ​​[1, -1, j, -j], which can be indicated by 2 bits; if it is BPSK, the common phase coefficient corresponding to the first codeword can be any one of the values ​​[1, -1], which can be indicated by 1 bit; if it is 8PSK, the common phase coefficient corresponding to the first codeword can be Any one of the eight values ​​can be indicated using 3 bits.

[0232] For example, when the second information includes 1 bit, when the value of the bit is 1, the common phase coefficient corresponding to the first codeword may be 1; when the value of the bit is 0, the common phase coefficient corresponding to the first codeword may be -1.

[0233] In some embodiments, the network device receives the second information. Optionally, the network device determines, based on the second information, a codebook corresponding to the first codeword for use in dual-polarization multi-layer operations. Optionally, the network device determines the first codeword based on the first information and the second information.

[0234] For example, the network device determines the angle parameter and distance parameter corresponding to the first codeword based on the first information. The network device can also determine the common phase coefficient corresponding to the first codeword based on the second information. The network device can then determine the codebook with the best communication quality for the terminal based on the angle parameter, distance parameter and common phase coefficient, and the corresponding codeword. The codeword is the first codeword determined by the terminal.

[0235] In some embodiments, the first information and the second information may be the same information, for example, different fields within the same information. Alternatively, the first information and the second information may be different information, for example, carried by different information elements. This disclosure is not limited to this.

[0236] In some embodiments, the second information may be "common phase coefficient indication information", "transmission type indication information", etc. The embodiment of the present disclosure does not limit the name of the second information.

[0237] In combination with some embodiments of the present disclosure, in one example, for a uniform array, the terminal can sample the angle domain and distance domain of the near-field area of ​​the antenna array in the horizontal dimension and the distance dimension respectively, and based on the basis vectors corresponding to the first codebook, construct a first codebook for use when the terminal is in the near-field area in both the horizontal dimension and the vertical dimension.

[0238] Furthermore, the terminal can perform channel estimation based on the CSI-RS to determine whether it is in the near-field region in both the horizontal and vertical dimensions, and traverse each codeword in the first codebook when it is determined that both are in the near-field region to determine the codeword with the best communication quality, that is, the first codeword, the corresponding horizontal and vertical angle sampling points, the horizontal and vertical distance sampling points, and the co-phase coefficient. Alternatively, the terminal can determine the optimal basis vector and co-phase coefficient among the basis vectors of the first codebook.

[0239] In addition, the terminal can send the index corresponding to the common phase coefficient and the angle sampling points in the horizontal dimension and the vertical dimension corresponding to the first codeword or the optimal basis vector, and the index corresponding to the distance sampling points in the horizontal dimension and the vertical dimension to the network device, so that the network device determines the first codeword determined by the terminal based on these index values ​​and the basis vector corresponding to the first codebook, and transmits the wireless signal based on the first codeword.

[0240] It is understandable that the terminal may further construct a first codebook that is used only when either the horizontal dimension or the distance dimension is in the near field area, and may further construct a first codebook corresponding to a uniform linear array. The specific implementation methods may be referred to the description in the above embodiments and will not be repeated here.

[0241] 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.

[0242] 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.

[0243] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0244] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0245] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0246] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0247] In some embodiments, terms such as wireless access scheme and waveform may be used interchangeably.

[0248] In some embodiments, the terms "precoding", "precoder", "weight", "precoding weight", "quasi-co-location (QCL)", "transmission configuration indication (TCI) state", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "the number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angular degree", "antenna", "antenna element", "panel" and the like can be used interchangeably.

[0249] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0250] 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.

[0251] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0252] 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.

[0253] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0254] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0255] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2101 and step S2103 may be implemented as independent embodiments, and step S2102 and step S2103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0256] In some embodiments, step S2102 and step S2103 may be executed in an interchangeable order or simultaneously.

[0257] In some embodiments, steps S2102 to S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0258] In some embodiments, step S2101 and step S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0259] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0260] FIG3A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a communication method (terminal side), the method comprising:

[0261] Step S3101: Determine a first codeword in a first codebook.

[0262] 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.

[0263] Step S3102, sending the first information.

[0264] 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.

[0265] In some embodiments, the network device sends the first information to the terminal, but is not limited thereto, and the first information may also be sent to other entities.

[0266] Step S3103, sending the second information.

[0267] 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.

[0268] In some embodiments, the network device sends the first information to the terminal, but is not limited thereto, and the first information may also be sent to other entities.

[0269] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3101 and step S3103 may be implemented as independent embodiments, and step S3102 and step S3103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0270] In some embodiments, step S3102 and step S3103 may be executed in an interchangeable order or simultaneously.

[0271] In some embodiments, steps S3102 to S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0272] In some embodiments, step S3101 and step S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0273] FIG3B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a communication method (terminal side), the method comprising:

[0274] Step S3201: Determine a first codeword in a first codebook.

[0275] Optional implementations of step S3201 can be found in step S2101 of FIG. 2 , optional implementations of step S3101 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2 and FIG. 3A , which will not be described in detail here.

[0276] Step S3202, sending the first information.

[0277] The optional implementation of step S3202 can refer to the optional implementation of step S2101 in Figure 2, step S3102 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

[0278] In some embodiments, the terminal determines a first codeword in a first codebook, where the first codebook is constructed based on an angle parameter and a distance parameter, and the first codebook is a codebook used when the terminal is in a near-field area of ​​a first antenna array, where the first antenna array is an antenna array used by a network device to transmit wireless signals to the terminal.

[0279] The terminal sends first information to the network device, where the first information is used to indicate an angle parameter and a distance parameter corresponding to the first codeword.

[0280] In some embodiments, the first antenna array is any one of the following: a uniform linear array; a uniform planar array.

[0281] In some embodiments, the number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1, and N2 is greater than or equal to 1.

[0282] In some embodiments, the angle parameter includes at least one of the following: a first angle domain parameter of the near field region in a horizontal dimension; and a second angle domain parameter of the near field region in a vertical dimension.

[0283] In some embodiments, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension, and the n′1th element of the first basis vector v is for: The n′2th element of the second basis vector u for: Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; represents the first angle domain parameter corresponding to the codeword in the first codebook, represents the second angle domain parameter corresponding to the codeword in the first codebook, r represents the distance parameter corresponding to the codeword in the first codebook, -1≤cosθ≤1, the distance parameter corresponding to the codeword in the first codebook satisfies at least one of the following: and in, j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0284] In some embodiments, the first information includes at least one of the following: first indication information, the first indication information is used to indicate the first angle domain parameter corresponding to the first codeword; second indication information, the second indication information is used to indicate the second angle domain parameter corresponding to the first codeword; third indication information, the third indication information is used to indicate the distance parameter corresponding to the first codeword.

[0285] In some embodiments, the angle parameter includes N1O1 angle sampling points obtained by quantizing the first angle domain parameter of the near-field area in the horizontal dimension, and / or, N2O2 angle sampling points obtained by quantizing the second angle domain parameter of the near-field area in the vertical dimension; the distance parameter includes N3O3 distance sampling points obtained by quantizing the first distance domain parameter of the near-field area in the horizontal dimension, and / or, N4O4 distance sampling points obtained by quantizing the second distance domain parameter of the near-field area in the vertical dimension; wherein N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

[0286] In some embodiments, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension, and the n′1th element of the first basis vector v is for: The n′2th element of the second basis vector u for: Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; l represents the angle sampling point index in the horizontal dimension corresponding to the codeword in the first codebook, m represents the angle sampling point index in the vertical dimension corresponding to the codeword in the first codebook, o1 represents the distance sampling point index in the horizontal dimension corresponding to the codeword in the first codebook, o2 represents the distance sampling point index in the vertical dimension corresponding to the codeword in the first codebook, l=0,1,…,N1O1-1, m=0,1,…,N2O2-1, o1=1,2,…,N3O3, o2=1,2,…,N4O4; j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0287] In some embodiments, the indices of the antenna ports of the first antenna array satisfy the following conditions: n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}; n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2} 。

[0288] In some embodiments, the initial phase of the basis vectors in the first codebook is zero; the n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0289] In some embodiments, the antenna spacings in the horizontal and vertical dimensions of the first antenna array are both and The n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0290] In some embodiments, the first information includes at least one of the following: a first indication field, the first indication field is used to indicate the angle sampling point index of the horizontal dimension of the first codeword; a second indication field, the second indication field is used to indicate the angle sampling point index of the vertical dimension of the first codeword; a third indication field, the third indication field is used to indicate the distance sampling point index of the horizontal dimension of the first codeword; and a fourth indication field, the fourth indication field is used to indicate the distance sampling point index of the vertical dimension of the first codeword.

[0291] In some embodiments, the first indication field includes at least bits; the second indication field includes at least bits; the third indication field includes at least bits; the fourth indication field includes at least bits.

[0292] In some embodiments, the first codebook is used for single-polarization single-layer transmission; or the first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on an angle parameter, a distance parameter, and a common phase coefficient.

[0293] In some embodiments, the method further includes: the terminal sending second information to the network device, where the second information is used to indicate a common phase coefficient corresponding to the first codeword.

[0294] In some embodiments, the common phase coefficient includes at least one of: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), and octal phase shift keying (8-PSK).

[0295] FIG4A is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a communication method (network device side), the method comprising:

[0296] Step S4101, obtain first information.

[0297] 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.

[0298] In some embodiments, the network device receives the first information sent by the terminal, but is not limited thereto and may also receive the first information sent by other entities.

[0299] In some embodiments, the network device obtains first information specified by a protocol.

[0300] In some embodiments, the network device obtains the first information from an upper layer(s).

[0301] In some embodiments, the network device performs processing to obtain the first information.

[0302] Step S4102, obtaining second information.

[0303] 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.

[0304] In some embodiments, the network device receives the second information sent by the terminal, but is not limited thereto and may also receive the second information sent by other entities.

[0305] In some embodiments, the network device obtains second information specified by the protocol.

[0306] In some embodiments, the network device obtains the second information from an upper layer(s).

[0307] In some embodiments, the network device performs processing to obtain the second information.

[0308] In some embodiments, step S4102 is omitted, and the terminal autonomously implements the function indicated by the second information, or the above function is default or acquiescent.

[0309] The communication method involved in the embodiment of the present disclosure may include at least one of steps S4101 to S4102. For example, step S4101 may be implemented as an independent embodiment, and step S4102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0310] In some embodiments, step S4101 and step S4102 may be executed in an interchangeable order or simultaneously.

[0311] In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0312] In some embodiments, step S4102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0313] FIG4B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a communication method (network device side), the method comprising:

[0314] Step S4201, obtain first information.

[0315] Optional implementations of step S4201 can be found in step S2101 of FIG. 2 , optional implementations of step S4101 of FIG. 4A , and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0316] In some embodiments, the network device receives first information sent by the terminal, the first information is used to indicate the angle parameter and distance parameter corresponding to the first codeword, the first codeword is a codeword in the first codebook, the first codebook is constructed based on the angle parameter and the distance parameter, the first codebook is a codebook used when the terminal is in the near field area of ​​the first antenna array, and the first antenna array is an antenna array for the network device to transmit wireless signals to the terminal.

[0317] In some embodiments, the first antenna array is any one of the following: a uniform linear array; a uniform planar array.

[0318] In some embodiments, the number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1, and N2 is greater than or equal to 1.

[0319] In some embodiments, the angle parameter includes at least one of the following: a first angle domain parameter of the near field region in a horizontal dimension; and a second angle domain parameter of the near field region in a vertical dimension.

[0320] In some embodiments, the basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension, and the n′1th element of the first basis vector v is for: The n′2th element of the second basis vector u for: Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; represents the first angle domain parameter corresponding to the codeword in the first codebook, represents the second angle domain parameter corresponding to the codeword in the first codebook, r represents the distance parameter corresponding to the codeword in the first codebook, -1≤cosθ≤1, the distance parameter corresponding to the codeword in the first codebook satisfies at least one of the following: and in, j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0321] In some embodiments, the first information includes at least one of the following: first indication information, the first indication information is used to indicate the first angle domain parameter corresponding to the first codeword; second indication information, the second indication information is used to indicate the second angle domain parameter corresponding to the first codeword; third indication information, the third indication information is used to indicate the distance parameter corresponding to the first codeword.

[0322] In some embodiments, the angle parameter includes N1O1 angle sampling points obtained by quantizing the first angle domain parameter of the near-field area in the horizontal dimension, and / or, N2O2 angle sampling points obtained by quantizing the second angle domain parameter of the near-field area in the vertical dimension; the distance parameter includes N3O3 distance sampling points obtained by quantizing the first distance domain parameter of the near-field area in the horizontal dimension, and / or, N4O4 distance sampling points obtained by quantizing the second distance domain parameter of the near-field area in the vertical dimension; wherein N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

[0323] In some embodiments, the n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for: Wherein, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1=n1+(N1+1) / 2, n′2=n2+(N2+1) / 2; l represents the angle sampling point index in the horizontal dimension corresponding to the codeword in the first codebook, m represents the angle sampling point index in the vertical dimension corresponding to the codeword in the first codebook, o1 represents the distance sampling point index in the horizontal dimension corresponding to the codeword in the first codebook, o2 represents the distance sampling point index in the vertical dimension corresponding to the codeword in the first codebook, l=0,1,…,N1O1-1, m=0,1,…,N2O2-1, o1=1,2,…,N3O3, o2=1,2,…,N4O4; j is an imaginary unit, λ represents the wavelength of the wireless signal, d x Denotes the horizontal antenna spacing of the first antenna array, D x Denotes the horizontal dimension length of the first antenna array, d z Denotes the vertical dimension of the first antenna array antenna spacing, D z Represents the vertical dimension length of the first antenna array.

[0324] In some embodiments, the indices of the antenna ports of the first antenna array satisfy the following conditions: n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2}; n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2} 。

[0325] In some embodiments, the initial phase of the basis vectors in the first codebook is zero; the n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0326] In some embodiments, the antenna spacings in the horizontal and vertical dimensions of the first antenna array are both and The n′1th element of the first basis vector v for: The n′2th element of the second basis vector u for:

[0327] In some embodiments, the first information includes at least one of the following: a first indication field, the first indication field is used to indicate the angle sampling point index of the horizontal dimension of the first codeword; a second indication field, the second indication field is used to indicate the angle sampling point index of the vertical dimension of the first codeword; a third indication field, the third indication field is used to indicate the distance sampling point index of the horizontal dimension of the first codeword; and a fourth indication field, the fourth indication field is used to indicate the distance sampling point index of the vertical dimension of the first codeword.

[0328] In some embodiments, the first indication field includes at least bits; the second indication field includes at least bits; the third indication field includes at least bits; the fourth indication field includes at least bits.

[0329] In some embodiments, the first codebook is used for single-polarization single-layer transmission; or the first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on an angle parameter, a distance parameter, and a common phase coefficient.

[0330] In some embodiments, the method further includes: the network device receiving second information sent by the terminal, where the second information is used to indicate a common phase coefficient corresponding to the first codeword.

[0331] In some embodiments, the common phase coefficient includes at least one of: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), and octal phase shift keying (8-PSK).

[0332] FIG5 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0333] Step S5101: The terminal determines a first codeword in a first codebook.

[0334] The optional implementation of step S5101 can be found in the optional implementation of step S2101 in Figure 2, step S3101 in Figure 3A, step S3201 in Figure 3B, and other related parts in the embodiments involved in Figures 2, 3A, 3B, 4A, and 4B, which will not be repeated here.

[0335] Step S5102: The terminal sends first information to the network device.

[0336] For the optional implementation of step S5102, please refer to step S2102 in Figure 2, step S3102 in Figure 3A, step S3202 in Figure 3B, step S4101 in Figure 4A, step S4201 in Figure 4B, and other related parts in the embodiments involved in Figures 2, 3A, 3B, 4A, and 4B, which will not be repeated here.

[0337] In some embodiments, the above method may include the methods of the above terminal side and network device side embodiments, which will not be repeated here.

[0338] Figure 6 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 6, the embodiment of the present disclosure relates to a communication method, and the method includes:

[0339] Step S6101: The terminal is in the near field area of ​​the first antenna array and determines a first codeword from a first codebook.

[0340] In some embodiments, the first codebook is a codebook used when the terminal is in a near-field area of ​​a first antenna array, and the first antenna array is an antenna array used by a network device to transmit wireless signals to the terminal.

[0341] In some embodiments, the first antenna array is a uniform linear array.

[0342] For a uniform linear array, in some embodiments, the first codebook may be represented as a precoding vector v, and the n′1th element in the precoding vector v may be calculated as: Among them, n′1=n1+(N1+1) / 2, that is, n′1=1,2,…,N1.

[0343] In some embodiments, in order to effectively reduce the feedback overhead of the precoding matrix, the angle domain cosθ and the distance domain r can be quantized separately. Since -1≤cosθ≤1 and exp(jπx)=exp(jπ(x+2)), when season when season because Therefore, it can be Where N1 and N3 represent the number of sampling points in the horizontal dimension angle domain and the horizontal dimension distance domain respectively, O1 and O3 represent the oversampling factors in the horizontal dimension angle domain and the horizontal dimension distance domain respectively, l = 0, 1, ..., N1O1-1 and o1 = 1, 2, ..., N3O3.

[0344] In some embodiments, it is desirable Therefore, we can get Therefore, substituting the above formula into the precoding vector We can get:

[0345] In addition, since n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2} and n′1=n1+(N1+1) / 2, and since the precoding vector The initial phase can be set to 0, so the terms unrelated to n′1 can be removed, that is, the precoding vector It can be calculated as:

[0346] The above precoding vector v can be used for single-polarization, single-layer transmission. If dual-polarization, multi-layer transmission is considered, a co-phase coefficient between polarization directions can be introduced, such as the QPSK co-phase coefficient {1, -1, j, -j}. In addition, the above basis vectors are also applicable to DL Type II codebook design.

[0347] For example, assume that the antenna spacing in the horizontal dimension of the antenna array is Horizontal dimension of antenna array Then the precoding vector It can be calculated as: From the above formula, we can see that when considering the far-field MIMO channel model, the above precoding vector Degenerates into It is consistent with the DL Type I codebook in the related art.

[0348] In some embodiments, the first antenna array is a homogeneous linear array.

[0349] For a uniform array, in some embodiments, the first codebook can be designed as The n′1th element of the horizontal dimension precoding vector v and the n′2th element of the vertical dimension precoding vector u can be calculated as: Among them, n′1=n1+(N1+1) / 2 and n′2=n2+(N2+1) / 2, that is, n′1=1,2,…,N1 and n′2=1,2,…,N2.

[0350] In some embodiments, in order to effectively reduce the feedback overhead of the precoding matrix, it is necessary to convert the angle domain and And the distance domain r are quantized separately. And exp(jπx)=exp(jπ(x+2)), so when season when season when season when season Due to the horizontal dimension And vertical dimension Therefore, and in Where N1, N2, N3 and N4 represent the number of sampling points in the horizontal dimension angle domain, vertical dimension angle domain, horizontal dimension distance domain and vertical dimension distance domain respectively, O1, O2, O3 and O4 represent the oversampling factors in the horizontal dimension angle domain, vertical dimension angle domain, horizontal dimension distance domain and vertical dimension distance domain respectively, l = 0, 1, ..., N1O1-1, m = 0, 1, ..., N2O2-1, o1 = 1, 2, ..., N3O3 and o2 = 1, 2, ..., N4O4.

[0351] In some embodiments, it is desirable Therefore, we can get and Therefore, substituting the above formula into the precoding vector yields:

[0352] In addition, since n1∈{-(N1-1) / 2,…,0,…(N1-1) / 2} and n2∈{-(N2-1) / 2,…,0,…(N2-1) / 2} and n′1=n1+(N1+1) / 2 and n′2=n2+(N2+1) / 2, and since the precoding vector can set the initial phase to 0, the terms unrelated to n′1 and n′2 can be removed, that is, the precoding vector can be expressed as:

[0353] Optionally, the above precoding vectors can be used for single-polarization single-layer transmission. If dual-polarization multi-layer transmission is considered, a co-phase coefficient between polarization directions can be introduced, such as the QPSK co-phase coefficient {1, -1, j, -j}. In addition, the above basis vectors are also applicable to DL Type II-based codebook design.

[0354] For example, assume that the antenna array horizontal and vertical antenna spacing is The horizontal and vertical lengths of the antenna array are and Then the precoding vectors v and u can be calculated as:

[0355] From the above formula, we can see that when considering the far-field MIMO channel model, the above precoding vector degenerates to and It is consistent with the DL Type I codebook in the related art.

[0356] In some embodiments, the terminal feeds back the first codebook and / or the first codeword to the network device. Optionally, the terminal may indicate different feedback parameters through the following information fields:

[0357] pass Bit indication l = 0, ... N1O1-1, using broadband or sub-band feedback;

[0358] pass Bit indication m=0,…N2O2-1, using broadband or sub-band feedback;

[0359] pass Bit indication o1=1,…N3O3-1 or o1=1,…N3O3, using broadband or sub-band feedback;

[0360] pass Bit indication o2=1,…N4O4-1 or o2=1,…N4O4, using broadband or sub-band feedback;

[0361] i2 is indicated by 1, 2 or 3 bits, corresponding to the common phase coefficients of BPSK, QPSK and 8-PSK respectively, using wideband or sub-band feedback.

[0362] 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.

[0363] 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, a terminal, a network device, etc.) in any of the above methods.

[0364] 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.

[0365] 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.

[0366] Figure 7A is a schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure. As shown in Figure 7A, the terminal 7100 may include: at least one of a transceiver module 7101 and a processing module 7102. In some embodiments, the processing module 7102 is used to determine a first codeword in a first codebook, the first codebook being constructed based on an angle parameter and a distance parameter. The first codebook is a codebook used when the terminal is in the near field area of ​​a first antenna array, and the first antenna array is an antenna array used by a network device to transmit a wireless signal to the terminal; the transceiver module 7101 is used to send first information to the network device, the first information being used to indicate the angle parameter and distance parameter corresponding to the first codeword. Optionally, the transceiver module 7101 is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2102 and step S2103, but not limited thereto) executed by the terminal in any of the above methods, which are not repeated here. Optionally, the processing module 7102 is used to execute at least one of the other steps (for example, step S2101) executed by the terminal in any of the above methods, which are not repeated here.

[0367] Figure 7B is a structural diagram of a network device proposed in an embodiment of the present disclosure. As shown in Figure 7B, the network device 7200 may include: at least one of a transceiver module 7201, a processing module 7202, etc. In some embodiments, the transceiver module 7201 is used to receive the first information sent by the terminal, the first information is used to indicate the angle parameter and distance parameter corresponding to the first codeword, the first codeword is a codeword in the first codebook, the first codebook is constructed based on the angle parameter and the distance parameter, the first codebook is the codebook used when the terminal is in the near field area of ​​the first antenna array, and the first antenna array is the antenna array for the network device to transmit wireless signals to the terminal. Optionally, the transceiver module 7201 is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2102, step S2103, but not limited to this) performed by the network device in any of the above methods, which will not be repeated here. Optionally, the processing module 7202 is used to execute at least one of the other steps performed by the network device in any of the above methods, which will not be repeated here.

[0368] 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.

[0369] 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.

[0370] Figure 8A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 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 8100 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.

[0371] As shown in Figure 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as 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. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more processors 8101 are used to call instructions to enable the communication device 8100 to perform any of the above methods.

[0372] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2102 and step S2103, but not limited thereto), and the processor 8101 performs at least one of the other steps (for example, step S2101, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0373] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memories 8103 may be located outside the communication device 8100. In alternative embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memory 8102 and may be configured to receive data from the memory 8102 or other devices, or to send data to the memory 8102 or other devices. For example, the interface circuits 8104 may read data stored in the memory 8102 and send the data to the processor 8101.

[0374] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A. 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.

[0375] FIG8B is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG8B , but the present disclosure is not limited thereto.

[0376] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0377] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Alternatively, all or part of memory 8203 may be located external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203 and may be used to receive data from memory 8203 or other devices, or may be used to send data to memory 8203 or other devices. For example, interface circuit 8202 may read data stored in memory 8203 and send the data to processor 8201.

[0378] In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., step S2102 and step S2103, but not limited thereto) of the aforementioned method. The interface circuit 8202 performing the communication steps (e.g., step S2102 and step S2103, but not limited thereto) of the aforementioned method means, for example, that the interface circuit 8202 performs data exchange between the processor 8201, chip 8200, memory 8203, or a transceiver device. In some embodiments, the processor 8201 performs at least one of the other steps (e.g., step S2101, but not limited thereto).

[0379] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0380] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute 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.

[0381] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0382] 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, The method includes: The terminal determines a first codeword in a first codebook. The first codebook is constructed based on an angle parameter and a distance parameter. The first codebook is a codebook used by the terminal in the near-field region of a first antenna array, and the first antenna array is an antenna array for the network device to transmit wireless signals to the terminal. The terminal sends first information to the network device. The first information is used to indicate the angle parameter and the distance parameter corresponding to the first codeword.

2. The method according to claim 1, characterized in that The first antenna array is any one of the following: a uniform linear array; a uniform planar array.

3. The method according to claim 1 or 2, characterized in that The number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1 and N2 is greater than or equal to 1.

4. The method according to claim 3, wherein The angle parameter includes at least one of the following: a first angle domain parameter of the near-field region in the horizontal dimension; a second angle domain parameter of the near-field region in the vertical dimension.

5. The method according to claim 4, characterized in that The basis vector of the first codebook is the Kronecker product of a first basis vector in the horizontal dimension and a second basis vector in the vertical dimension. The n′1-th element of the first basis vector v It is: The \(n'_2\)-th element of the second basis vector \(\mathbf{u}\) It is: Where n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1 = n1+(N1 + 1) / 2, and n′2 = n2+(N2 + 1) / 2. Indicates the first angular domain parameter corresponding to the codeword in the first codebook, Indicates the second angular domain parameter corresponding to the codeword in the first codebook, and r indicates the distance parameter corresponding to the codeword in the first codebook. -1 ≤ cosθ ≤ 1, and the distance parameters corresponding to the codewords in the first codebook satisfy at least one of the following: With Among them, j is the imaginary unit, λ represents the wavelength of the wireless signal, d x represents the antenna spacing in the horizontal dimension of the first antenna array, D x represents the length in the horizontal dimension of the first antenna array, d z represents the antenna spacing in the vertical dimension of the first antenna array, D z represents the length in the vertical dimension of the first antenna array.

6. The method according to any one of claims 4-5, characterized in that, The first information includes at least one of the following: First indication information, which is used to indicate a first angle domain parameter corresponding to the first codeword. Second indication information, which is used to indicate a second angle domain parameter corresponding to the first codeword. Third indication information, which is used to indicate a distance parameter corresponding to the first codeword.

7. The method according to claim 3, characterized in that, The angle parameter includes N1O1 angle sampling points obtained by quantifying a first angle domain parameter of the near-field region in the horizontal dimension, and / or N2O2 angle sampling points obtained by quantifying a second angle domain parameter of the near-field region in the vertical dimension. The distance parameter includes N3O3 distance sampling points obtained by quantifying a first distance domain parameter of the near-field region in the horizontal dimension, and / or N4O4 distance sampling points obtained by quantifying a second distance domain parameter of the near-field region in the vertical dimension. Where N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angle parameter in the horizontal dimension, O2 represents the oversampling factor of the angle parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

8. The method according to claim 7, wherein The basis vector of the first codebook is the Kronecker product of a first basis vector in the horizontal dimension and a second basis vector in the vertical dimension. The n′1-th element of the first basis vector v is: The n'2-th element of the second basis vector u is: Where n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1 = n1+(N1 + 1) / 2, and n′2 = n2+(N2 + 1) / 2. Let \(l\) denote the index of the angular sampling point corresponding to the codeword in the horizontal dimension of the first codebook, \(m\) denote the index of the angular sampling point corresponding to the codeword in the vertical dimension of the first codebook, \(o1\) denote the index of the distance sampling point corresponding to the codeword in the horizontal dimension of the first codebook, \(o2\) denote the index of the distance sampling point corresponding to the codeword in the vertical dimension of the first codebook, \(l = 0,1,\cdots,N1O1 - 1\), \(m = 0,1,\cdots,N2O2 - 1\), \(o1 = 1,2,\cdots,N3O3\), \(o2 = 1,2,\cdots,N4O4\); j is the imaginary unit, λ represents the wavelength of the wireless signal, d x represents the antenna spacing in the horizontal dimension of the first antenna array, D x represents the length of the first antenna array in the horizontal dimension, d z represents the antenna spacing in the vertical dimension of the first antenna array, D z represents the length of the first antenna array in the vertical dimension.

9. The method according to claim 8, wherein The index of the antenna port of the first antenna array satisfies the following conditions: \(n1\in\{-(N1 - 1) / 2,\cdots,0,\cdots(N1 - 1) / 2\}\); \(n2\in\{-(N2 - 1) / 2,\cdots,0,\cdots(N2 - 1) / 2\}\).

10. The method according to claim 9, characterized in that, The initial phase of the basis vector is zero; The n′1-th element of the first basis vector v is: The n'2-th element of the second basis vector u It is:

11. The method according to claim 10, characterized in that, The antenna spacings in both the horizontal and vertical dimensions of the first antenna array are and The n′1-th element of the first basis vector v is: The n'2-th element of the second basis vector u It is:

12. The method according to any one of claims 8-11, characterized in that, The first information includes at least one of the following: A first indication field for indicating the index of the angular sampling point in the horizontal dimension of the first codeword; A second indication field for indicating the index of the angular sampling point in the vertical dimension of the first codeword; A third indication field for indicating the index of the distance sampling point in the horizontal dimension of the first codeword; A fourth indication field for indicating the index of the distance sampling point in the vertical dimension of the first codeword.

13. The method according to claim 12, wherein, The first indication field at least includes bits; The second indication field at least includes bits; The third indication field at least includes bits; The fourth indication field at least includes bits.

14. The method according to any one of claims 1-13, characterized in that, The first codebook is used for single-polarization single-layer transmission; or, The first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on the angular parameter, the distance parameter, and the co-phase coefficient.

15. The method according to claim 14, wherein The method further includes: The terminal sends second information to the network device, and the second information is used to indicate the co-phase coefficient corresponding to the first codeword.

16. The method according to any one of claims 14 - 15, characterized in that, The co-phase coefficient includes at least one of the following: Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), and Octal Phase Shift Keying (8-PSK).

17. A communication method, characterized in that, The method includes: The network device receives the first information sent by the terminal, and the first information is used to indicate the angular parameter and the distance parameter corresponding to the first codeword. The first codeword is a codeword in the first codebook, and the first codebook is constructed based on the angular parameter and the distance parameter. The first codebook is the codebook used by the terminal in the near-field region of the first antenna array, and the first antenna array is the antenna array for the network device to transmit wireless signals to the terminal.

18. The method according to claim 17, wherein The first antenna array is any one of the following: Uniform linear array; Uniform planar array.

19. The method according to claim 17 or 18, characterized in that, The number of antenna ports in the horizontal dimension of the first antenna array is N1, and the number of antenna ports in the vertical dimension is N2, where N1 is greater than or equal to 1 and N2 is greater than or equal to 1.

20. The method according to claim 19, wherein The angular parameter includes at least one of the following: The first angular domain parameter of the near-field region in the horizontal dimension; The second angular domain parameter of the near-field region in the vertical dimension.

21. The method according to claim 20, characterized in that, The basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension; The n′1-th element of the first basis vector v is: The \(n'_2\)-th element of the second basis vector \(\mathbf{u}\) is: Among them, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1 = n1 + (N1 + 1) / 2, n′2 = n2 + (N2 + 1) / 2; Indicates the first angular domain parameter corresponding to the codeword in the first codebook, Indicates the second angular domain parameter corresponding to the codeword in the first codebook, and r indicates the distance parameter corresponding to the codeword in the first codebook. The distance parameters corresponding to the codewords in the first codebook satisfy at least one of the following: With Among them, j is the imaginary unit, λ represents the wavelength of the wireless signal, d x represents the antenna spacing in the horizontal dimension of the first antenna array, D x represents the length in the horizontal dimension of the first antenna array, d z represents the antenna spacing in the vertical dimension of the first antenna array, D z represents the length in the vertical dimension of the first antenna array.

22. The method according to any one of claims 20-21, characterized in that, The first information includes at least one of the following: First indication information, which is used to indicate the first angular domain parameter corresponding to the first codeword; Second indication information, which is used to indicate the second angular domain parameter corresponding to the first codeword; Third indication information, which is used to indicate the distance parameter corresponding to the first codeword.

23. The method according to claim 19, wherein The angular parameter includes N1O1 angular sampling points obtained by quantizing the first angular domain parameter of the near-field region in the horizontal dimension, and / or N2O2 angular sampling points obtained by quantizing the second angular domain parameter of the near-field region in the vertical dimension; The distance parameter includes N3O3 distance sampling points obtained by quantizing the first distance domain parameter of the near-field region in the horizontal dimension, and / or N4O4 distance sampling points obtained by quantizing the second distance domain parameter of the near-field region in the vertical dimension; Among them, N3 represents the number of sampling points of the distance parameter in the horizontal dimension, N4 represents the number of sampling points of the distance parameter in the vertical dimension, O1 represents the oversampling factor of the angular parameter in the horizontal dimension, O2 represents the oversampling factor of the angular parameter in the vertical dimension, O3 represents the oversampling factor of the distance parameter in the horizontal dimension, and O4 represents the oversampling factor of the distance parameter in the vertical dimension.

24. The method according to claim 23, wherein, The basis vector of the first codebook is the Kronecker product of the first basis vector in the horizontal dimension and the second basis vector in the vertical dimension; The n′1-th element of the first basis vector v is: The n'2-th element of the second basis vector u is: Among them, n1 represents the index of the antenna port in the horizontal dimension, n2 represents the index of the antenna port in the vertical dimension, n′1 = n1 + (N1 + 1) / 2, n′2 = n2 + (N2 + 1) / 2; l represents the index of the angular sampling point in the horizontal dimension corresponding to the codeword in the first codebook, m represents the index of the angular sampling point in the vertical dimension corresponding to the codeword in the first codebook, o1 represents the index of the distance sampling point in the horizontal dimension corresponding to the codeword in the first codebook, o2 represents the index of the distance sampling point in the vertical dimension corresponding to the codeword in the first codebook, l = 0, 1, …, N1O1 - 1, m = 0, 1, …, N2O2 - 1, o1 = 1, 2, …, N3O3, o2 = 1, 2, …, N4O4; j is the imaginary unit, λ represents the wavelength of the wireless signal, and d x represents the antenna spacing in the horizontal dimension of the first antenna array, and D x Indicates the horizontal dimension length of the first antenna array, d z Indicates the antenna spacing in the vertical dimension of the first antenna array, D z Indicates the length of the first antenna array in the vertical dimension.

25. The method according to claim 24, wherein The indices of the antenna ports of the first antenna array satisfy the following conditions: n1 ∈ {-(N1 - 1) / 2, …, 0, … (N1 - 1) / 2}; n2 ∈ {-(N2 - 1) / 2, …, 0, … (N2 - 1) / 2}.

26. The method according to claim 25, wherein The initial phase of the basis vector in the first codebook is zero; The n′1-th element of the first basis vector v It is: The n'2-th element of the second basis vector u is:

27. The method according to claim 26, wherein The antenna spacing in both the horizontal and vertical dimensions of the first antenna array is and The n′1-th element of the first basis vector v is: The \(n'_2\)-th element of the second basis vector \(\mathbf{u}\) is:

28. The method according to any one of claims 24 - 27, characterized in that, The first information includes at least one of the following: First indication field, which is used to indicate the index of the angular sampling point in the horizontal dimension of the first codeword; Second indication field, which is used to indicate the index of the angular sampling point in the vertical dimension of the first codeword; A third indication field for indicating a distance sampling point index of a horizontal dimension of the first codeword; A fourth indication field for indicating a distance sampling point index of a vertical dimension of the first codeword.

29. The method according to claim 28, wherein The first indication field at least includes bits; The second indication field at least includes bits; The third indication field at least includes bits; The fourth indication field at least includes bits.

30. The method according to any one of claims 17-29, characterized in that, The first codebook is used for single-polarization single-layer transmission; or The first codebook is used for dual-polarization multi-layer transmission, and the first codebook is constructed based on the angle parameter, the distance parameter, and the co-phase coefficient.

31. The method according to claim 30, wherein The method further includes: The terminal sends second information to the network device, and the second information is used to indicate a co-phase coefficient corresponding to the first codeword.

32. The method according to any one of claims 30-31, characterized in that, The co-phase coefficient includes at least one of the following: Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), and Octal Phase Shift Keying (8-PSK).

33. A terminal, characterized in that, The terminal includes: A processing module for determining a first codeword in a first codebook, the first codebook being constructed based on an angle parameter and a distance parameter, the first codebook being a codebook used by the terminal in a near-field region of a first antenna array, and the first antenna array being an antenna array for the network device to transmit a wireless signal to the terminal; A transceiver module for sending first information to the network device, the first information being used to indicate an angle parameter and a distance parameter corresponding to the first codeword.

34. A network device, characterized in that, The network device includes: A transceiver module for receiving first information sent by a terminal, the first information being used to indicate an angle parameter and a distance parameter corresponding to a first codeword, the first codeword being a codeword in the first codebook, the first codebook being constructed based on an angle parameter and a distance parameter, and the first codebook being a codebook used by the terminal in a near-field region of a first antenna array, and the first antenna array being an antenna array for the network device to transmit a wireless signal to the terminal.

35. A terminal, characterized in that, Includes: One or more processors; A memory coupled to the one or more processors, the memory including executable instructions, which when executed by the one or more processors, cause the terminal to execute the communication method according to any one of claims 1-16.

36. A network device, characterized in that, Includes: One or more processors; A memory coupled to the one or more processors, the memory including executable instructions, which when executed by the one or more processors, cause the network device to execute the communication method according to claims 16-32.

37. A communication system, characterized in that, Includes a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1-16, and the network device is configured to implement the communication method according to any one of claims 16-32.

38. A storage medium storing instructions, characterized in that, When the instructions run on a communication device, the communication device is caused to execute the communication method according to any one of claims 1-16 or claims 16-32.

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