INTERFERENCE MEASUREMENT METHOD, BASE STATION AND USER EQUIPMENT

• US 20150200760A1
• Filed: 03/27/2015
• Published: 07/16/2015
• Est. Priority Date: 09/29/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: XIA, Liang, ZHOU, Yongxing, SUN, Jingyuan, MAZZARESE, David Jean-Marie
• Granted Patent: US 9,774,432 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0076 Distributed coding, e.g. network coding, involving channel coding coding in both space and time H04L1/0618; cooperative diversity H04B7/022
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Embodiments of the present invention provide an interference measurement method, a base station, and a user equipment. The method includes: determining, by a user equipment, a first resource for interference measurement in a first subframe or determining a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information; and performing interference measurement on the first resource, or performing no interference measurement on the second resource. The embodiments of the present invention can improve precision of interference measurement.

Claims

1. An interference measurement method, comprising:

receiving, by a user equipment, at least one of zero-power channel state information reference signal CSI-RS configuration information, non-zero power CSI-RS configuration information, and channel state information interference measurement CSI-IM configuration information that are sent by a base station;

determining, by the user equipment, a first resource for interference measurement in a first subframe or determining a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information; and

performing, by the user equipment, interference measurement on the first resource in the first subframe, or, performing no interference measurement on the second resource in the first subframe.

2. The method according to claim 1, wherein the first subframe is a subframe for receiving downlink data, and the determining, by the user equipment, a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, comprises:

determining, by the user equipment, existence of a CSI-IM resource in the subframe for receiving downlink data and existence of at least one resource element RE other than a zero-power CSI-RS resource in the CSI-IM resource according to the CSI-IM configuration information and the zero-power CSI-RS configuration information, so that the user equipment determines that the CSI-IM resource is the second resource not for interference measurement;

or

determining, by the user equipment, existence of a CSI-IM resource in the subframe for receiving downlink data and existence of at least one RE other than a non-zero power CSI-RS resource in the CSI-IM resource according to the CSI-IM configuration information and the non-zero power CSI-RS configuration information, so that the user equipment determines that the CSI-IM resource is the second resource not for interference measurement;

or

according to the CSI-IM configuration information, determining, by the user equipment, that a CSI-IM resource exists in the subframe for receiving downlink data, and determining that the CSI-IM resource is for receiving downlink data sent by the base station, so that the user equipment determines that the CSI-IM resource is the second resource not for interference measurement.

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

sending, by the base station, scheduling information to the user equipment, so that the user equipment determines, according to the scheduling information, information about a subframe for receiving downlink data.

3. An interference measurement method, comprising:

sending, by a base station, at least one of zero-power channel state information reference signal CSI-RS configuration information, non-zero power CSI-RS configuration information, and channel state information interference measurement CSI-IM configuration information to a user equipment, so that the user equipment determines a first resource for interference measurement in a first subframe or determines a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information.

5. A user equipment, comprising:

a receiver, configured to receive at least one of zero-power channel state information reference signal CSI-RS configuration information, non-zero power CSI-RS configuration information, and channel state information interference measurement CSI-IM configuration information that are sent by the base station; and

a processor, configured to determine a first resource for interference measurement in a first subframe or determine a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, wherein

the processor is further configured to perform interference measurement on the first resource in the first subframe, or, perform no interference measurement on the second resource in the first subframe.

6. The user equipment according to claim 5, wherein:

the first subframe is a subframe for receiving downlink data, the processor determines the second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, and the processor is specifically configured to;

determine existence of a CSI-IM resource in the subframe for receiving downlink data and existence of at least one resource element RE other than a zero-power CSI-RS resource in the CSI-IM resource according to the CSI-IM configuration information and the zero-power CSI-RS configuration information, so that the processor determines that the CSI-IM resource is the second resource not for interference measurement;

or

determine existence of a CSI-IM resource in the subframe for receiving downlink data and existence of at least one RE other than a non-zero power CSI-RS resource in the CSI-IM resource according to the CSI-IM configuration information and the non-zero power CSI-RS configuration information, so that the processor determines that the CSI-IM resource is the second resource not for interference measurement;

or

according to the CSI-IM configuration information, determine that a CSI-IM resource exists in the subframe for receiving downlink data, and determine that the CSI-IM resource is for receiving downlink data sent by the base station, so that the processor determines that the CSI-IM resource is the second resource not for interference measurement.

7. The user equipment according to claim 6, wherein the processor is specifically configured to:

perform no interference measurement on the second resource in the subframe for receiving downlink data.

8. The user equipment according to claim 5, wherein:

the first subframe is a candidate interference measurement reference resource subframe, the processor determines the second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, and the processor is specifically configured to;

determine existence of a CSI-IM resource in the first subframe and existence of at least one RE, which is a non-zero power CSI-RS resource, in the CSI-IM resource according to the CSI-IM configuration information and the non-zero power CSI-RS configuration information, so that the processor determines that the CSI-IM resource is the second resource not for interference measurement.

9. The user equipment according to claim 5, wherein:

the first subframe is a candidate interference measurement reference resource subframe, the processor determines the first resource for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, and the processor is specifically configured to;

determine existence of a CSI-IM resource in the first subframe and nonexistence of any RE, which is a non-zero power CSI-RS resource, in the CSI-IM resource according to the CSI-IM configuration information and the non-zero power CSI-RS configuration information, so that the processor determines that the CSI-IM resource is the first resource for interference measurement.

10. The user equipment according to claim 5, wherein:

the first subframe is a subframe not for receiving downlink data, the processor determines the first resource for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, and the processor is specifically configured to;

determine existence of a CSI-IM resource in the subframe not for receiving downlink data and existence of at least one RE other than a zero-power CSI-RS resource in the CSI-IM resource according to the CSI-IM configuration information and the zero-power CSI-RS configuration information, so that the processor determines that the CSI-IM resource is the first resource for interference measurement.

11. The user equipment according to claim 10, wherein the processor is further specifically configured to:

perform interference measurement on the first resource in the subframe not for receiving downlink data.

12. The user equipment according to claim 5, wherein:

the first subframe is a subframe for receiving downlink data, the processor determines the first resource for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information, and the processor is specifically configured to;

determine existence of a CSI-IM resource in the subframe for receiving downlink data and existence of at least one RE, which is a zero-power CSI-RS resource, in the CSI-IM resource according to the CSI-IM configuration information and the zero-power CSI-RS configuration information, so that the processor determines that an RE, which is a zero-power CSI-RS resource, in the CSI-IM resource is the first resource for interference measurement;

or

according to the CSI-IM configuration information, determine that a CSI-IM resource exists in the subframe for receiving downlink data, and determine that at least one RE in the CSI-IM resource is not for receiving downlink data sent by the base station, so that the processor determines that the RE not for receiving downlink data sent by the base station in the CSI-IM resource is the first resource for interference measurement.

13. The user equipment according to claim 12, wherein the processor is further specifically configured to:

perform interference measurement on the first resource in the subframe for receiving downlink data.

14. The user equipment according to claim 5, wherein:

before a first resource for interference measurement in the first subframe is determined or a second resource not for interference measurement in the first subframe is determined, the receiver is further specifically configured to;

receive scheduling information sent by the base station; and

determine, according to the scheduling information, information about the subframe for receiving downlink data.

15. The user equipment according to claim 5, wherein:

before a first resource for interference measurement in the first subframe is determined or a second resource not for interference measurement in the first subframe is determined, the receiver is further specifically configured to;

detect scheduling information sent by the base station; and

if the scheduling information is not detected, determine that a detected subframe is subframe not for receiving downlink data.

16. The user equipment according to claim 5, wherein:

before a first resource for interference measurement in the first subframe is determined or a second resource not for interference measurement in the first subframe is determined, the receiver is further specifically configured to;

receive interference measurement indication information sent by the base station, wherein the interference measurement indication information is used as an instruction of determining the first resource and performing interference measurement on the first resource in the subframe or an instruction of determining the second resource and performing no interference measurement on the second resource in the subframe.

17. The user equipment according to claim 16, wherein the interference measurement indication information corresponds to at least one CSI-IM resource configured by the base station for the user equipment, or corresponds to at least one CSI process configured by the base station for the user equipment.

18. A base station, comprising:

a sender, configured to send at least one of zero-power channel state information reference signal CSI-RS configuration information, non-zero power CSI-RS configuration information, and channel state information interference measurement CSI-IM configuration information to a user equipment, so that the user equipment determines a first resource for interference measurement in a first subframe or determines a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information.

19. The base station according to claim 18, wherein the sender is further configured to:

send scheduling information to the user equipment, so that the user equipment determines, according to the scheduling information, information about a subframe for receiving downlink data.

20. The base station according to claim 18, wherein the sender is further specifically configured to:

send interference measurement indication information to the user equipment, wherein the interference measurement indication information is used as an instruction of determining the first resource and performing interference measurement on the first resource in the subframe or an instruction of determining the second resource and performing no interference measurement on the second resource in the subframe.