Channel state measurement method and apparatus

1. A channel state measurement method, comprising:

selecting, by a network device from N channel state information-reference signal (CSI-RS) resources, a target CSI-RS resource and a target channel state information-interference measurement (CSI-IM) resource group associated with the target CSI-RS resource, wherein the target CSI-IM resource group comprises a CSI-RS resource in the N CSI-RS resources, an i th CSI-RS resource in the N CSI-RS resources is associated with n i CSI-IM resource groups, and a k th CSI-IM resource group in the n i CSI-IM resource groups comprises x ik CSI-RS resources in the N CSI-RS resources except the i th CSI-RS resource, wherein N, i, n i , k, and x ik are all integers, N≥2, 1≤n i ≤N, k=1, 2, . . . , n i , 0≤x ik ≤N−1, j∈{1, 2, . . . , N}, and n j ≥2, and wherein the quantity n i of CSI-IM resource groups associated with the i th CSI-RS resource meets 1≤n i ≤N 1 , N 1 , is an integer, and 2≤N 1 ≤N; and

sending, by the network device, first indication information by using first signaling, wherein the first indication information indicates the target CSI-RS resource and the target CSI-IM resource group, the first indication information comprises ┌log 2 N┐+┌log 2 N 1 ┐ bits, the ┌log 2 N┐ bits indicate the target CSI-RS resource, and the ┌log 2 N 1 ┐ bits indicate the target CSI-IM resource group.

2. The method according to claim 1 , wherein in n j CSI-IM resource groups associated with a j th CSI-RS resource in the N CSI-RS resources, different CSI-IM resource groups comprise different quantities of CSI-RS resources.

3. The method according to claim 1 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . ,N, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group in the n i CSI-IM resource groups associated with the i th CSI-RS resource is:

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4. A channel state measurement method, comprising:

receiving, by a terminal device, first signaling, wherein the first signaling carries first indication information, the first indication information indicates a target channel state information-reference signal (CSI-RS) resource and a target channel state information-interference measurement (CSI-IM) resource group, the target CSI-IM resource group comprises a CSI-RS resource in the N CSI-RS resources, an i th CSI-RS resource in the N CSI-RS resources is associated with n i CSI-IM resource groups, and a k th CSI-IM resource group in the n i CSI-IM resource groups comprises x ik CSI-RS resources in the N CSI-RS resources except the i th CSI-RS resource, wherein N, i, n i , k, and x ik are all integers, N≥2, 1≤n i ≤N, k=1, 2, . . . , n i , 0≤x ik ≤N−1, j∈{1, 2, . . . , N}, and n j ≥2, wherein the quantity n i of CSI-IM resource groups associated with the i th CSI-RS resource meets 1≤n i ≤N 1 , N 1 , is an integer, and 2≤N 1 ≤N, and wherein the first indication information comprises ┌log 2 N┐+┌log 2 N 1 ┐ bits, the ┌log 2 N┐ bits indicate the target CSI-RS resource, and the ┌log 2 N 1 ┐ bits indicate the target CSI-IM resource group; and

reporting, by the terminal device, a channel quality indicator (CQI), wherein the CQI is determined based on a channel coefficient measured by the terminal device on the target CSI-RS resource and interference measured by the terminal device on the CSI-RS resource in the target CSI-IM resource group.

5. The method according to claim 4 , wherein in n j CSI-IM resource groups associated with a j th CSI-RS resource in the N CSI-RS resources, different CSI-IM resource groups comprise different quantities of CSI-RS resources.

6. The method according to claim 4 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . , N, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group in the n i CSI-IM resource groups associated with the i th CSI-RS resource is:

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7. The method according to claim 4 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . , N, a quantity of CSI-IM resource groups associated with the i th CSI-RS resource is n i =N+1−i, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group is:

{1,2, . . . , i+k−1}/{i}, wherein

a set A/a set B represents a set of remaining elements in the set A after elements in the set B are removed from the set A.

8. The method according to claim 4 , wherein the N CSI-RS resources are non-zero power CSI-RS resources, and each CSI-IM resource group further comprises a zero power CSI-RS resource.

9. The method according to claim 4 , wherein before the receiving, by a terminal device, first signaling, the method further comprises:

receiving, by the terminal device, second signaling, wherein the second signaling carries first configuration information, and the first configuration information is used to configure the N CSI-RS resources.

10. A channel state measurement apparatus, comprising:

at least one processor;

one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to select, from N channel state information-reference signal (CSI-RS) resources, a target CSI-RS resource and a target channel state information-interference measurement (CSI-IM) resource group associated with the target CSI-RS resource, wherein the target CSI-IM resource group comprises a CSI-RS resource in the N CSI-RS resources, an i th CSI-RS resource in the N CSI-RS resources is associated with n i CSI-IM resource groups, and a k th CSI-IM resource group in the n i CSI-IM resource groups comprises x ik CSI-RS resources in the N CSI-RS resources except the i th CSI-RS resource, wherein N, i, n i , k, and x ik are all integers, N≥2, 1≤n i ≤N, k=1, 2, . . . , n i , 0≤x ik ≤N−1, j∈{1, 2, . . . , N}, and n j ≥2, and wherein the quantity n i of CSI-IM resource groups associated with the i th CSI-RS resource meets 1≤n i ≤N 1 , N 1 , is an integer, and 2≤N 1 ≤N; and

a transmitter, the transmitter configured to send first indication information by using first signaling, wherein the first indication information indicates the target CSI-RS resource and the target CSI-IM resource group, the first indication information comprises ┌log 2 N┐+┌log 2 N 1 ┐ bits, the ┌log 2 N┐ bits indicate the target CSI-RS resource, and the ┌log 2 N 1 ┐ bits indicate the target CSI-IM resource group.

11. The apparatus according to claim 10 , wherein in n j CSI-IM resource groups associated with a j th CSI-RS resource in the N CSI-RS resources, different CSI-IM resource groups comprise different quantities of CSI-RS resources.

12. The apparatus according to claim 10 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . , N, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group in the n i CSI-IM resource groups associated with the i th CSI-RS resource is:

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a set A/a set B represents a set of remaining elements in the set A after elements in the set B are removed from the set A.

13. A channel state measurement apparatus, comprising:

a receiver, the receiver configured to receive first signaling, wherein the first signaling carries first indication information, the first indication information indicates a target channel state information-reference signal (CSI-RS) resource and a target channel state information-interference measurement (CSI-IM) resource group, the target CSI-IM resource group comprises a CSI-RS resource in the N CSI-RS resources, an i th CSI-RS resource in the N CSI-RS resources is associated with n i CSI-IM resource groups, and a k th CSI-IM resource group in the n i CSI-IM resource groups comprises x ik CSI-RS resources in the N CSI-RS resources except the i th CSI-RS resource, wherein N, i, n i , k, and x ik are all integers, N≥2, 1≤n i ≤N, k=1, 2, . . . , n i , 0≤x ik ≤N−1, j∈{1, 2, . . . , N}, and n j ≥2, wherein the quantity n i of CSI-IM resource groups associated with the i th CSI-RS resource meets 1≤n i ≤N 1 , N 1 , is an integer, and 2≤N 1 ≤N, and wherein the first indication information comprises ┌log 2 N┐+┌log 2 N 1 ┐ bits, the ┌log 2 N┐ bits indicate the target CSI-RS resource, and the ┌log 2 N 1 ┐ bits indicate the target CSI-IM resource group; and

a transmitter, the transmitter configured to report a channel quality indicator (CQI), wherein the CQI is determined based on a channel coefficient measured by the apparatus on the target CSI-RS resource and interference measured by the apparatus on the CSI-RS resource in the target CSI-IM resource group.

14. The apparatus according to claim 13 , wherein in n j CSI-IM resource groups associated with a j th CSI-RS resource in the N CSI-RS resources, different CSI-IM resource groups comprise different quantities of CSI-RS resources.

15. The apparatus according to claim 13 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . , N, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group in the n i CSI-IM resource groups associated with the i th CSI-RS resource is:

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16. The apparatus according to any one of claim 13 , wherein identifiers of the N CSI-RS resources are 1, 2, . . . , N, a quantity of CSI-IM resource groups associated with the i th CSI-RS resource is n i =N+1−i, and a set of identifiers of CSI-RS resources comprised in the k th CSI-IM resource group is:

{1,2, . . . , i+k−1}/{i}, wherein

a set A/a set B represents a set of remaining elements in the set A after elements in the set B are removed from the set A.

17. The apparatus according to any one of claim 13 , wherein the N CSI-RS resources are non-zero power CSI-RS resources, and each CSI-IM resource group further comprises a zero power CSI-RS resource.

18. The apparatus according to any one of claim 13 , wherein the receiver is further configured to:

receive second signaling before receiving the first signaling, wherein the second signaling carries first configuration information, and the first configuration information is used to configure the N CSI-RS resources.