METHOD FOR REPORTING CHANNEL STATE INFORMATION HAVING REFLECTED INTERFERENCE CANCELLATION CAPABILITY THEREIN, AND APPARATUS THEREFOR

• US 20150256280A1
• Filed: 03/06/2015
• Published: 09/10/2015
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Hanjun, Kim, Kijun, Kim, Hyungtae, Lee, Hyunho
• Granted Patent: US 9,680,591 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04J 11/005 of intercell interference

Abstract

A method for reporting channel state information (CSI) having reflected interference cancellation capability therein in a wireless communication system is performed by a terminal and includes receiving interference configuration information indicating a first group of cells corresponding to targets for which interference cancellation capability is reflected, and scheduling information of a serving cell, from the serving cell, receiving a specific sequence transmitted from a second group of cells, determining whether to reflect the interference cancellation capability for the first group of cells and the second group of cells, using the interference configuration information, the scheduling information or the specific sequence, and transmitting CSI having reflected the interference cancellation capability therein, wherein the second group of cells correspond to candidate cells capable of reflecting the interference cancellation capability other than the indicated cells.

Claims

1. A method for reporting channel state information (CSI) having reflected interference cancellation capability therein in a wireless communication system, the method performed by a terminal and comprising:

receiving interference configuration information indicating a first group of cells corresponding to targets for which interference cancellation capability is reflected, and scheduling information of a serving cell, from the serving cell;

receiving a specific sequence transmitted from a second group of cells;

determining whether to reflect the interference cancellation capability for the first group of cells and the second group of cells, using the interference configuration information, the scheduling information or the specific sequence; and

transmitting CSI having reflected the interference cancellation capability therein,

wherein the second group of cells correspond to candidate cells capable of reflecting the interference cancellation capability other than the indicated cells.

2. The method according to claim 1, wherein the specific sequence indicates that the second group of cells perform restricted scheduling for a specific period of time.

3. The method according to claim 1, wherein the first group of cells are indicated by physical cell identifiers (PCIs) or reference signal information, and

wherein the reference signal information comprises a sequence of reference signal, the number of transmission antenna port or a resource element (RE) mapping pattern.

4. The method according to claim 1, wherein the interference configuration information comprises information about characteristics of interference signals transmitted from the first group of cells, and

wherein the information about the characteristics of the interference signals comprises information about modulation order, the number of layers or precoding.

5. The method according to claim 1, wherein the scheduling information of the serving cell comprises information about a delay for processing the CSI and a scheduling period based on the CSI at a specific timing, and

wherein the specific timing is pre-configured or configured through higher layer signaling.

6. The method according to claim 2, wherein, if the specific period of time overlaps with the scheduling period based on the CSI, the interference cancellation capability is determined to be reflected for the second group of cells.

7. The method according to claim 1, wherein the interference configuration information includes information indicating cell(s) corresponding to targets for which interference cancellation capability is not reflected.

8. A terminal configured to report channel state information (CSI) in a wireless communication system, the terminal comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein the processor is further configured to receive interference configuration information indicating a first group of cells corresponding to targets for which interference cancellation capability is reflected, and scheduling information of a serving cell, from the serving cell, receive a specific sequence transmitted from a second group of cells, determine whether to reflect the interference cancellation capability for the first group of cells and the second group of cells, using the interference configuration information, the scheduling information or the specific sequence, and transmit CSI having reflected the interference cancellation capability therein, and

wherein the second group of cells correspond to candidate cells capable of reflecting the interference cancellation capability other than the indicated cells.

9. The terminal according to claim 8, wherein the specific sequence indicates that the second group of cells perform restricted scheduling for a specific period of time.

10. The terminal according to claim 8, wherein the first group of cells are indicated by physical cell identifiers (PCIs) or reference signal information, and

wherein the reference signal information comprises a sequence of reference signal, the number of transmission antenna port or a resource element (RE) mapping pattern.

11. The terminal according to claim 8, wherein the interference configuration information comprises information about characteristics of interference signals transmitted from the first group of cells, and

wherein the information about the characteristics of the interference signals comprises information about modulation order, the number of layers or precoding.

12. The terminal according to claim 8, wherein the scheduling information of the serving cell comprises information about a delay for processing the CSI and a scheduling period based on the CSI at a specific timing, and

wherein the specific timing is pre-configured or configured through higher layer signaling.

13. The terminal according to claim 9, wherein, if the specific period of time overlaps with the scheduling period based on the CSI, the interference cancellation capability is determined to be reflected for the second group of cells.

14. The terminal according to claim 8, wherein the interference configuration information includes information indicating cell(s) corresponding to targets for which interference cancellation capability is not reflected.