Granted Patent B2

US 12,445,182 · App. 18/066,478 · Granted Oct 14, 2025

Inventors: Xueru Li (Beijing, CN); Mingxin Gong (Beijing, CN); Bingyu Qu (Beijing, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04B7/0626H04B7/0632H04B7/0639

Abstract

Claims (48)

1. A communication method, comprising:

receiving, by a terminal device, first signaling, wherein the first signaling is used to configure K 1 channel state information-reference signal CSI-RS resources; and

reporting, by the terminal device, channel state information CSI, wherein the CSI comprises a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K 2 CSI-RS resources, and the K 2 CSI-RS resources are resources in the K 1 CSI-RS resources, wherein

both K 1 and K 2 are positive integers, K 1 is greater than 1, and K 2 is greater than 1 and less than or equal to K 1 ;

wherein the COI of the first codeword is determined conditionally based on a precoding matrix indicator PMI, and a quantity of rows of a precoding matrix indicated by the PMI is equal to a sum of all or some port quantities of the K 2 CSI-RS resources; and

wherein the CSI is determined based on a channel measurement result of a k th CSI-RS resource in the K 2 CSI-RS resources, a k th first parameter and a reference precoding matrix.

2. The communication method according to claim 1 , wherein

the k th first parameter is determined based on a matrix part corresponding to a port of the k th CSI-RS resource in the precoding matrix and the reference precoding matrix, k=1, 2, . . . , K 2 , and the reference precoding matrix is a matrix part corresponding to a port of one of the K 1 CSI-RS resources in the precoding matrix.

3. The communication method according to claim 2 , wherein the CSI is determined based on the following information:

the channel measurement result of the k th CSI-RS resource, the k th first parameter, and a second parameter of the k th CSI-RS resource, wherein

the second parameter of the k th CSI-RS resource is determined based on a physical downlink shared channel PDSCH and the k th CSI-RS resource.

4. The communication method according to claim 2 , wherein the first parameter is configured by a network device for the terminal device by using second signaling; or

the first parameter is reported by the terminal device, and the CSI comprises the first parameter.

5. A non-transitory computer-readable storage medium, configured to store a computer program, wherein the computer program comprises instructions used to perform the method according to claim 1 .

6. A chip, comprising a processor and an interface, configured to: invoke a computer program stored in a memory, and run the computer program to perform the method according to claim 1 .

7. A communication method, comprising:

transmitting, by a network device, first signaling to a terminal device, wherein the first signaling is used to configure K 1 channel state information-reference signal CSI-RS resources; and

receiving, by the network device, channel state information CSI from the terminal device, wherein the CSI comprises a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K 2 CSI-RS resources, and the K 2 CSI-RS resources are resources in the K 1 CSI-RS resources, wherein

both K 1 and K 2 are positive integers, K 1 is greater than 1, and K 2 is greater than 1 and less than or equal to K 1 ;

wherein the COI of the first codeword is determined conditionally based on a precoding matrix indicator PMI, and a quantity of rows of a precoding matrix indicated by the PMI is equal to a sum of all or some port quantities of the K 2 CSI-RS resources; and

wherein the CSI is determined based on a channel measurement result of a k th CSI-RS resource in the K 2 CSI-RS resources, a k th first parameter and a reference precoding matrix.

8. The communication method according to claim 7 , wherein the kth first parameter is determined based on a matrix part corresponding to a port of the kth CSI-RS resource in the precoding matrix and the reference precoding matrix, and the reference precoding matrix is a matrix part corresponding to a port of one of the K1 CSI-RS resources in the precoding matrix.

9. A communications apparatus, comprising:

a receiver, configured to receive first signaling, wherein the first signaling is used to configure K 1 channel state information-reference signal CSI-RS resources; and

a transmitter, configured to report channel state information CSI, wherein the CSI comprises a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K 2 CSI-RS resources, and the K 2 CSI-RS resources are resources in the K 1 CSI-RS resources, wherein

both K 1 and K 2 are positive integers, K 1 is greater than 1, and K 2 is greater than 1 and less than or equal to K 1 ;

wherein the COI of the first codeword is determined conditionally based on a precoding matrix indicator PMI, and a quantity of rows of a precoding matrix indicated by the PMI is equal to a sum of all or some port quantities of the K 2 CSI-RS resources; and

wherein the CSI is determined based on a channel measurement result of a k th CSI-RS resource in the K 2 CSI-RS resources, a k th first parameter and a reference precoding matrix.

10. The communication apparatus according to claim 9 , wherein

the k th first parameter is determined based on a matrix part corresponding to a port of the k th CSI-RS resource in the precoding matrix and the reference precoding matrix, k=1, 2, . . . , K 2 , and the reference precoding matrix is a matrix part corresponding to a port of one of the K 1 CSI-RS resources in the precoding matrix.

11. The communication apparatus according to claim 10 , wherein the CSI is determined based on the following information:

the channel measurement result of the k th CSI-RS resource, the k th first parameter, and a second parameter of the k th CSI-RS resource, wherein

the second parameter of the k th CSI-RS resource is determined based on a physical downlink shared channel PDSCH and the k th CSI-RS resource.

12. The communication apparatus according to claim 10 , wherein the first parameter is configured by a network device for the apparatus by using second signaling; or

the first parameter is determined by the apparatus, and the CSI comprises the first parameter.

13. A communications apparatus, comprising:

a transmitter, configured to transmit first signaling to a terminal device, wherein the first signaling is used to configure K 1 channel state information-reference signal CSI-RS resources; and

a receiver, configured to receive channel state information CSI from the terminal device, wherein the CSI comprises a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K 2 CSI-RS resources, and the K 2 CSI-RS resources are resources in the K 1 CSI-RS resources, wherein

both K 1 and K 2 are positive integers, K 1 is greater than 1, and K 2 is greater than 1 and less than or equal to K 1 ;

wherein the COI of the first codeword is determined conditionally based on a precoding matrix indicator PMI, and a quantity of rows of a precoding matrix indicated by the PMI is equal to a sum of all or some port quantities of the K 2 CSI-RS resources; and

wherein the CSI is determined based on a channel measurement result of a k th CSI-RS resource in the K 2 CSI-RS resources, a k th first parameter and a reference precoding matrix.

14. The communication apparatus according to claim 13 , wherein

the k th first parameter is determined based on a matrix part corresponding to a port of the k th CSI-RS resource in the precoding matrix and the reference precoding matrix, k=1, 2, . . . , K 2 , and the reference precoding matrix is a matrix part corresponding to a port of one of the K 1 CSI-RS resources in the precoding matrix.

15. The communication apparatus according to claim 14 , wherein the CSI is determined based on the following information:

the channel measurement result of the k th CSI-RS resource, the k th first parameter, and a second parameter of the k th CSI-RS resource, wherein

the second parameter of the k th CSI-RS resource is determined based on a physical downlink shared channel PDSCH and the k th CSI-RS resource.

16. The communication apparatus according to claim 14 , wherein the first parameter is configured by the apparatus for the terminal device by using second signaling; or

the first parameter is reported by the terminal device, and the CSI comprises the first parameter.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (21)