Communication method and apparatus

Patent metadata

Field	Value
Publication number	US-12457017-B2
Application number	US-202318526282-A
Country	US
Kind code	B2
Filing date	Dec 1, 2023
Priority date	Jun 1, 2021
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A communication method and apparatus. A terminal device determines channel state information based on S indexes of S vectors. Each of the S vectors is included in a first vector quantization dictionary. The first vector quantization dictionary includes N 1 vectors, where N 1 and S are both positive integers. The terminal device sends the channel state information to a network device. Because a vector included in the vector quantization dictionary usually has a relatively large dimension, quantizing channel information by using the first vector quantization dictionary is equivalent to performing dimension expansion on the channel information or maintaining a relatively high dimension. High-precision feedback is implemented by using relatively low signaling overheads.

First claim

What is claimed is:

1. An apparatus, comprising:
a first circuit; and
a second circuit;
wherein the first circuit is configured to determine channel state information, wherein the channel state information is determined based on S indexes of S vectors, each of the S vectors includes in a first vector quantization dictionary, the first vector quantization dictionary includes N 1 vectors, and N 1 and S are both positive integers greater than 1; and
send, through the second circuit, the channel state information to a network device;
wherein the S vectors are determined based on S pieces of first channel information and the first vector quantization dictionary, and the S pieces of first channel information are information output by an encoder network for an input being one channel matrix.

2. The apparatus according to claim 1 , wherein the N 1 vectors have a same length, and the length is equal to at least one dimension in an output dimension of the encoder network.

3. The apparatus according to claim 1 , wherein an input dimension of the encoder network is determined based on an input dimension of a first reference encoder network, and the output dimension of the encoder network is determined based on an output dimension of the first reference encoder network.

4. The apparatus according to claim 3 , wherein the first reference encoder network corresponds to a first reference decoder network.

5. The apparatus according to claim 4 , wherein a first reference network includes the first reference encoder network and the first reference decoder network, and the first reference network further includes a reference vector quantization dictionary.

6. The apparatus according to claim 1 , wherein the input dimension of the encoder network is M or M×2, the output dimension of the encoder network is D×S, and M and D are both positive integers; and
M≤N tx ×N sb ×z, S≤M, z is a positive integer greater than or equal to 1, N tx represents a quantity of transmit antenna ports of the network device, and N sb represents a quantity of frequency domain sub-bands.

7. The apparatus according to claim 1 , wherein the input dimension of the encoder network is M×N×2 or M×N, the output dimension of the encoder network is D×P×Q, S=P×Q, and M, N, D, P, and Q are all positive integers; and
M≤N tx , N≤N sb , and S≤M×N; or
M=N tx ×x, N=N sb ×y, and S≤(N tx ×x)×(N sb ×y); or
M=N tx ×N rx , N=N sb , and S≤(N tx ×N rx )×N sb , wherein
N tx represents a quantity of transmit antenna ports of the network device, N sb represents a quantity of frequency domain sub-bands, N rx represents a quantity of receive antenna ports of a terminal device, and x and y are both greater than 1.

8. The apparatus according to claim 1 , wherein the input dimension of the encoder network is M×N×T×2 or M×N×T, the output dimension of the encoder network is D×P×Q×R, S=P×Q×R, and M, N, D, P, Q, R, and T are all positive integers; and
M=N tx , N=N sb , T=N rx , and S≤N rx ×N tx ×N sb , wherein
N tx represents a quantity of transmit antenna ports of the network device, N sb represents a quantity of frequency domain sub-bands, and Nyx represents a quantity of receive antenna ports of a terminal device.

9. The apparatus according to claim 1 , wherein the first circuit is further configured to send, through the second circuit, information about the first vector quantization dictionary to the network device.

10. The apparatus according to claim 9 , wherein the first circuit is further configured to send, through the second circuit, the information about the first vector quantization dictionary to the network device by performing at least one of the following through the second circuit:
periodically sending the information about the first vector quantization dictionary to the network device;
periodically sending the information about the first vector quantization dictionary to the network device after first configuration information is received from the network device;
sending the information about the first vector quantization dictionary to the network device after first configuration information is received from the network device;
sending the information about the first vector quantization dictionary to the network device in an arrival time unit of a first delay after first configuration information is received from the network device, wherein the first configuration information includes information about the first delay;
sending the information about the first vector quantization dictionary to the network device after first parameter information is received from the network device, wherein the first parameter information indicates parameter information of a decoder network;
sending the information about the first vector quantization dictionary to the network device in an arrival time unit of a first delay after first parameter information is received from the network device, wherein the first parameter information indicates parameter information of the decoder network;
sending the information about the first vector quantization dictionary to the network device after first indication information is received from the network device, wherein the first indication information is used to trigger sending of the first vector quantization dictionary; or
sending the information about the first vector quantization dictionary to the network device in an arrival time unit of a first delay after first indication information is received from the network device, wherein the first indication information is used to trigger sending of the first vector quantization dictionary.

11. The apparatus according to claim 1 , wherein
a current networking manner is a first networking manner, and the first vector quantization dictionary is a vector quantization dictionary corresponding to the first networking manner;
a moving speed of the terminal device belongs to a first interval, and the first vector quantization dictionary is a vector quantization dictionary corresponding to the first interval;
the terminal device is handed over from a second cell to a first cell, and the first vector quantization dictionary is a vector quantization dictionary corresponding to the first cell;
the used reference encoder network is switched from a second reference encoder network to the first reference encoder network, and the first vector quantization dictionary is a vector quantization dictionary corresponding to the first reference encoder network; or
the first vector quantization dictionary is a vector quantization dictionary indicated by second indication information, and the second indication information comes from the network device.

12. The apparatus according to claim 1 , wherein the first circuit is further configured to perform the following:
sending, through the second circuit, second parameter information to the network device, wherein the second parameter information indicates a parameter of the encoder network.

13. The apparatus according to claim 12 , wherein the first circuit is further configured to send, through the second circuit, the second parameter information to the network device by performing at least one of the following:
periodically sending the second parameter information to the network device;
periodically sending the second parameter information to the network device after second configuration information is received from the network device;
sending the second parameter information to the network device after second configuration information is received from the network device;
sending the second parameter information to the network device in an arrival time unit of a second delay after second

Assignees

• Huawei Tech Co Ltd

Inventors

• Shi Hongzhe
• Cheng Min
• Zhang Wenkai
• Liang Jing
• Chen Zhitang
• Wu Yiqun
• Jin Huangping

Classifications

• H04B7/0452

  Multi-user MIMO systems · CPC title

• H04B7/0663

  using vector or matrix manipulations · CPC title

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title