METHOD FOR TRANSCEIVING A SIGNAL, AND BASE STATION AND USER EQUIPMENT FOR SAME

• US 20120322492A1
• Filed: 01/28/2011
• Published: 12/20/2012
• Est. Priority Date: 02/26/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Koo, Ja Ho, Kang, Ji Won, Ihm, Bin Chul
• Granted Patent: US 8,983,511 B2
• Time in Patent Office: Days
• US Class Current: 455/517
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

The present invention relates to a method for mitigating inter-cell interference in a multi-cell DAS. In one embodiment of the present invention, user equipment estimates an interfering antenna of an adjacent cell on the basis of RS pattern information of the adjacent cell, provided by a base station of a serving cell, or the base station provides the user equipment with information which specifies an interfering cell of the adjacent cell.

Claims

1. A method for transmitting a signal in a base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the method comprising the steps of:

transmitting first information to a user equipment within the certain cell, the first information being used for specifying a first antenna used for communication with the user equipment among the plurality of distributed antennas within the certain cell; and

transmitting second information to the user equipment, the second information being used for specifying a second antenna interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell.

2. The method according to claim 1, wherein the second information includes information on a reference signal pattern of the neighboring cell.

3. The method according to claim 1 or 2, wherein the second information includes information indicating the number and index of the second antenna within the neighboring cell.

4. The method according to claim 3, wherein the first information includes information indicating the number and index of the first antenna within the certain cell.

5. A base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the base station comprising:

a transmitter configured to transmit a signal; and

a processor configured to control the transmitter to transmit first information to a user equipment within the certain cell, the first information being used for specifying a first antenna used for communication with the user equipment among the plurality of distributed antennas within the certain cell and transmit second information to the user equipment, the second information being used for specifying a second antenna interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell.

6. The base station according to claim 5, wherein the processor is configured to generate the second information, which includes information on a reference signal pattern of the neighboring cell, and provide the generated information to the transmitter.

7. The base station according to claim 5, wherein the processor is configured to generate the second information, which includes information indicating the number and index of the second antenna within the neighboring cell, and provide the generated information to the transmitter.

8. The base station according to claim 7, wherein the processor is configured to generate the first information, which includes information indicating the number and index of the first antenna within the certain cell, and provide the generated information to the transmitter.

9. A method for receiving a signal in user equipment from a base station, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the method comprising the steps of:

receiving first information used for specifying a first antenna used for communication with the user equipment among the plurality of distributed antennas within the base station;

receiving second information used for specifying a second antenna interfering with the user equipment among a plurality of distributed antennas within a neighboring base station of the base station; and

generating channel quality information on the basis of the first information and the second information.

10. The method according to claim 9, wherein the second information includes information on a reference signal pattern of the neighboring base station.

11. The method according to claim 9, wherein the second information includes information indicating the number and index of the second antenna within the neighboring base station.

12. The method according to claim 11, wherein the first information includes information indicating the number and index of the first antenna within the base station.

13. A user equipment receiving a signal from a base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the user equipment comprising:

a receiver configured to receive the signal; and

a processor configured to control the receiver to receive first information used for specifying a first antenna used for communication with the user equipment among the plurality of distributed antennas within the certain cell and receive second information used for specifying a second antenna interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell, and configured to generate channel quality information on the basis of the first information and the second information.

14. The user equipment according to claim 13, wherein the second information includes information on a reference signal pattern of the neighboring cell, and the processor is configured to acquire a reference signal of the neighboring cell on the basis of the reference signal pattern information of the neighboring cell.

15. The user equipment according to claim 14, wherein the processor is configured to determine the number and index of the second antenna interfering with the user equipment among the plurality of distributed antennas within the neighboring cell on the basis of the reference signal of the neighboring cell.

16. The user equipment according to claim 13, wherein the second information includes information indicating the number and index of the second antenna within the neighboring cell, and the processor is configured to calculate an interference signal from the second antennas on the basis of the reference signal within the neighboring cell and the number and index of the second antenna within the neighboring cell.

17. The user equipment according to claim 16, wherein the first information includes information indicating the number and index of the first antenna within the base station.