METHOD FOR REDUCING INTER-CELL INTERFERENCE IN COOPERATIVE MULTI-CELL WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME

• US 20140370908A1
• Filed: 02/28/2013
• Published: 12/18/2014
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Seo, Hanbyul
• Granted Patent: US 9,515,790 B2
• Time in Patent Office: Days
• US Class Current: 455/452.1
• 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: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]

Abstract

The present invention relates to a method for reducing inter-cell interference in a wireless communication system and to an apparatus for same. More specifically, a method for reducing the inter-cell interference between serving cells in the cooperative multi-cell wireless communication system comprises the steps of: receiving from an adjacent cell interference information on a specific wireless resource region; and reducing interference with respect to the specific wireless resource region based on the interference information, wherein the specific wireless resource region is a wireless resource region that the serving cell uses by changing the purpose of a wireless resource.

Claims

1. A method for reducing inter-cell interference of a serving cell in a cooperative multi-cell wireless communication system, the method comprising the steps of:

receiving interference information on a specific radio resource region from a neighboring cell; and

reducing interference with respect to the specific radio resource region on the basis of the interference information,

wherein the specific radio resource region is a radio resource region used by the serving cell by changing usage of a radio resource.

2. The method according to claim 1, further comprising the step of transmitting transmission power information for the specific radio resource region to the neighboring cell.

3. The method according to claim 2, wherein the transmission power information includes information on a threshold value set in accordance with interference features of the specific radio resource region.

4. The method according to claim 1, wherein the interference information is UpLink Interference Overload Indication (UL IOI) that includes information indicating interference level in the specific radio resource region.

5. The method according to claim 1, wherein the interference information includes information on the amount of interference for allowing the neighboring cell to perform uplink communication in the specific radio resource region.

6. The method according to claim 4, wherein the interference information is received from a neighboring cell that performs uplink communication.

7. The method according to claim 1, wherein the interference information includes information indicating uplink or downlink on communication performed by the neighboring cell in the specific radio resource region.

8. The method according to claim 1, wherein the interference information includes information on the number of times of communication performed by the neighboring cell in a specific time interval, and the number of times of communication is for at least one of uplink communication and downlink communication.

9. The method according to claim 1, wherein the interference information is information indicating a specific time on a time period corresponding to the specific radio resource region.

10. The method according to claim 1, wherein the step of reducing interference is performed by controlling a transmission power configured with respect to the specific radio resource region.

11. A serving cell for reducing inter-cell interference in a cooperative multi-cell wireless communication system, the serving cell comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive interference information on a specific radio resource region from a neighboring cell and reduce interference with respect to the specific radio resource region on the basis of the interference information, and

the specific radio resource region is a radio resource region used by the serving cell by changing usage of a radio resource.