Granted Patent B2

US 12,706,655 · App. 18/174,504 · Granted Aug 11, 2026

Inventors: Ying Chen (Hangzhou, CN); Jianwei Zhou (Hangzhou, CN); Jiayu Zheng (Hangzhou, CN); Hejia Luo (Hangzhou, CN); Rong Li (Hangzhou, CN); Jun Wang (Hangzhou, CN)

Assignee: Huawei Technologies Co., Ltd.

H04B7/0639H04B7/0456

Abstract

Claims (71)

1 . A method, comprising:

receiving, by a terminal device from an access network device, a first reference signal that is precoded using a first precoding matrix;

sending, by the terminal device to the access network device, first information, wherein the first information is determined by the terminal device based on a measurement result of the first reference signal, and the first information determines a target precoding matrix; and

receiving, by the terminal device from the access network device, information precoded using the target precoding matrix;

wherein the first precoding matrix at a 1 st moment is a basic precoding matrix determined based on a first channel, the first channel is a channel between the access network device and a target reference point, and the terminal device is located in an area range corresponding to the target reference point; and

the first precoding matrix at an i th moment is a target precoding matrix at an (i−1) th moment, wherein i is an integer, and i≥2.

2 . The method according to claim 1 , wherein the first information comprises amplitude information of a target channel or phase information of the target channel or amplitude information and phase information of the target channel, the target channel being a channel between the terminal device and the access network device.

3 . The method according to claim 1 , wherein

a resolution corresponding to the first information is preconfigured.

4 . The method according to claim 1 , wherein

content of the first information at the 1 st moment comprises channel information of a target channel at the 1 st moment; and

content of the first information at an N th moment comprises differential information of the target channel at an (N−1) th moment and the N th moment, wherein

at the i th moment, the target channel is used to transmit the first reference signal corresponding to the i th moment, N is a positive integer, 1≤i≤N, and N≥2.

5 . The method according to claim 4 , wherein the method further comprises:

receiving, by the terminal device from the access network device, a second reference signal precoded using a third precoding matrix;

determining, by the terminal device, second information based on the measurement result of the first reference signal and a measurement result of the second reference signal, wherein the second information indicates the first reference signal; and

sending, by the terminal device to the access network device, the second information indicating that the first precoding matrix is used for data transmission.

6 . The method according to claim 1 , further comprising:

determining, by the terminal device, a resolution corresponding to the first information; and

sending, by the terminal device to the access network device, the resolution corresponding to the first information.

7 . The method according to claim 1 , further comprising:

obtaining, by the terminal device, indication information from the access network device, wherein the indication information indicates a resolution corresponding to the first information.

8 . A method comprising:

sending, by an access network device to a terminal device, a first reference signal that is precoded using a first precoding matrix;

obtaining, by the access network device from the terminal device, first information, wherein the first information is based on a measurement result of the first reference signal;

determining, by the access network device, a second precoding matrix based on the first information;

determining, by the access network device, a target precoding matrix based on the first precoding matrix and the second precoding matrix; and

precoding, by the access network device, to-be-sent information using the target precoding matrix;

wherein the first precoding matrix at a 1 st moment is a basic precoding matrix determined based on a first channel, the first channel is a channel between the access network device and a target reference point, and the terminal device is located in an area range corresponding to the target reference point; and

wherein the first precoding matrix at an i th moment is a target precoding matrix at an (i−1) th moment, wherein i is an integer, and i≥2.

9 . The method according to claim 8 , wherein the method further comprises:

obtaining, by the access network device, location information, wherein the location information comprises at least one of following: information about relative locations of the access network device and a target reference point, or a geographical location of the target reference point, and wherein the terminal device is located in an area range corresponding to the target reference point;

determining, by the access network device, channel information of a first channel based on the location information, wherein the first channel is a channel between the access network device and the target reference point; and

determining, by the access network device, the first precoding matrix based on the channel information of the first channel.

10 . The method according to claim 8 , wherein the first information comprises amplitude information of a target channel or phase information of the target channel or amplitude information and phase information of the target channel, and the target channel is a channel between the access network device and the terminal device.

11 . The method according to claim 8 , wherein

a resolution corresponding to the first information is preconfigured.

12 . The method according to claim 8 , wherein,

determining, by the access network device, the second precoding matrix based on the first information comprises:

determining, by the access network device, the second precoding matrix at an N th moment based on content of the first information at the N th moment, the content comprising differential information of a target channel at the N th moment and an (N−1) th moment, wherein at the i th moment, the target channel is used to transmit the first reference signal corresponding to the i th moment, N is an integer, 1≤i≤N, N≥2, and the target channel is a channel between the access network device and the terminal device;

determining, by the access network device, the target precoding matrix based on the first precoding matrix and the second precoding matrix comprises:

determining, by the access network device, the target precoding matrix at the N th moment based on the first precoding matrix at the N th moment and the second precoding matrix at the N th moment; and

precoding, by the access network device, the to-be-sent information using the target precoding matrix comprises:

precoding, by the access network device, the to-be-sent information using the target precoding matrix at the N th moment.

13 . The method according to claim 12 , wherein the method further comprises:

sending, by the access network device, a second reference signal that is precoded using a third precoding matrix;

obtaining, by the access network device, second information, wherein the second information is based on the measurement result of the first reference signal and a measurement result of the second reference signal, and indicates the first reference signal; and

determining, by the access network device based on the second information, that the first precoding matrix corresponding to the first reference signal is used for data transmission.

14 . The method according to claim 8 , further comprising:

obtaining, by the access network device from the terminal device, a resolution corresponding to the first information.

15 . The method according to claim 8 , further comprising:

determining, by the access network device, a resolution corresponding to the first information; and

sending, by the access network device, indication information to the terminal device, wherein the indication information indicates the resolution corresponding to the first information.

16 . An apparatus, comprising:

at least one processor; and

memory storing instructions that are executable by the at least one processor, wherein executing the instructions causes the apparatus to:

receive, from an access network device, a first reference signal that is precoded using a first precoding matrix;

send, to the access network device, first information, wherein the first information is determined by the apparatus based on a measurement result of the first reference signal, and the first information determines a target precoding matrix; and

receive, from the access network device, information precoded using the target precoding matrix;

wherein the first precoding matrix at a 1 st moment is a basic precoding matrix determined based on a first channel, the first channel is a channel between the access network device and a target reference point, and the apparatus is located in an area range corresponding to the target reference point; and

the first precoding matrix at an i th moment is a target precoding matrix at an (i−1) th moment, wherein i is an integer, and i≥2.

17 . The apparatus according to claim 16 , wherein the first information comprises amplitude information of a target channel or phase information of the target channel or amplitude information and phase information of the target channel, the target channel being a channel between the apparatus and the access network device.

18 . The apparatus according to claim 16 , wherein a resolution corresponding to the first information is preconfigured.

19 . The apparatus according to claim 16 , wherein:

content of the first information at the 1 st moment comprises channel information of a target channel at the 1 st moment; and

content of the first information at an N th moment comprises differential information of the target channel at an (N−1) th moment and the N th moment, wherein

at the i th moment, the target channel is used to transmit the first reference signal corresponding to the i th moment, N is a positive integer, 1≤i≤N, and N≥2.

20 . The apparatus according to claim 19 , wherein executing the instructions causes the apparatus to:

receive, from the access network device, a second reference signal precoded using a third precoding matrix;

determine second information based on the measurement result of the first reference signal and a measurement result of the second reference signal, wherein the second information indicates the first reference signal; and

send, to the access network device, the second information indicating that the first precoding matrix is used for data transmission.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (33)