Method and apparatus for controlling interference in wireless communication system

• US 9,668,267 B2
• Filed: 09/13/2013
• Issued: 05/30/2017
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Kijun, Lim, Jaewon
• Primary Examiner(s): MATTIS, JASON E
• Application Number:
  US14/431,682
• Publication Number:
  US 20150257164A1
• Time in Patent Office: 1,355 Days
• CPC Class Codes: H04L 43/04 Processing captured monitoring data, e.g. for logfile generation
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/00 Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The method for a first base station for controlling interference between base stations in a wireless communication system according to one embodiment of the present invention comprises a step of receiving, from a second base station, fully blank subframe (FBS)-related information in which transmission power is set to zero (0) in a downlink control region and a downlink data region; and a step of transmitting resource allocation information based on the FBS-related information to a user device. The FBS-related information may be determined based on the almost blank subframe (ABS) pattern information of the second base station.

Claims

1. A method of controlling interference between base stations, by a first base station in a wireless communication system, the method comprising:

receiving FBS (fully blank subframe)-related information indicating at least one subframe of which transmission power of a downlink control region and a downlink data region is set to zero (0) from a second base station; and

transmitting resource allocation information based on the FBS-related information to a user equipment,

wherein the FBS-related information is determined based on ABS (almost blank subframe) pattern information of the second base station,

wherein the FBS-related information comprises an overlapped subframe indicator, and

wherein the overlapped subframe indicator corresponds to information indicating whether at least one subframe designated as both an ABS and an FBS is to be determined as an ABS or an FBS.

2. The method of claim 1, wherein the FBS-related information designates a part of at least one subframe, which is designated as the ABS by the ABS pattern information of the second base station, as the FBS.

3. The method of claim 1, wherein the FBS-related information further comprises an FBS start subframe, an FBS period, and an FBS duration,

wherein the FBS start subframe corresponds to a number or an index of a subframe to be firstly designated as the FBS in the ABS pattern information of the second base station,

wherein the FBS period corresponds to a period of repeating the FBS, and

wherein the FBS duration corresponds to the number of subframes to be designated as the FBS for the FBS period.

4. The method of claim 1, further comprising:

transmitting information on an interference measurement set based on the FBS-related information to the user equipment; and

receiving a result measured in the interference measurement set from the user equipment.

5. A method of controlling interference between base stations, by a user equipment in a wireless communication system, the method comprising:

receiving resource allocation information based on FBS (fully blank subframe)-related information from a first base station; and

performing a cell search in a subframe determined as an FBS based on the FBS-related information,

wherein the FBS-related information indicates at least one subframe of which transmission power of a downlink control region and a downlink data region is set to zero (0),

wherein the FBS-related information is determined based on ABS (almost blank subframe) pattern information of a second base station neighboring to the first base station,

wherein the FBS-related information comprises an overlapped subframe indicator, and

wherein the overlapped subframe indicator corresponds to information indicating whether at least one subframe designated as both an ABS and an FBS is to be determined as an ABS or an FBS.

6. The method of claim 5, further comprising:

receiving information on an interference measurement set based on the FBS-related information from the first base station; and

transmitting a result measured in the interference measurement set to the first base station.

7. A base station controlling interference between base stations in a wireless communication system, comprising:

an RF (radio frequency) unit; and

a processor configured to control the RF unit,

wherein the processor is configured to;

receive FBS (fully blank subframe)-related information indicating at least one subframe of which transmission power of a downlink control region and a downlink data region is set to zero (0) from a second base station, and

transmit resource allocation information based on the FBS-related information to a user equipment,

wherein the FBS-related information is determined based on ABS (almost blank subframe) pattern information of the second base station,

wherein the FBS-related information comprises an overlapped subframe indicator, and

wherein overlapped subframe indicator corresponds to information indicating whether at least one subframe designated as both an ABS and an FBS is to be determined as an ABS or an FBS.

8. The base station of claim 7, wherein the FBS-related information designates a part of at least one subframe, which is designated as the ABS by the ABS pattern information of the second base station, as the FBS.

9. The base station of claim 7, wherein the FBS-related information further comprises an FBS start subframe, an FBS period, and an FBS duration,

wherein the FBS start subframe corresponds to a number or an index of a subframe to be firstly designated as the FBS in the ABS pattern information of the second base station,

wherein the FBS period corresponds to a period of repeating the FBS, and

wherein the FBS duration corresponds to the number of subframes to be designated as the FBS for the FBS period.

10. The base station of claim 7, wherein the processor is configured to:

transmit information on an interference measurement set based on the FBS-related information to the user equipment, and

receive a result measured in the interference measurement set from the user equipment.

11. A user equipment controlling interference between base stations in a wireless communication system, the user equipment comprising:

an RF (radio frequency) unit; and

a processor configured to control the RF unit, the processor configured to;

receive resource allocation information based on FBS-related information from a first base station, and

perform a cell search in a subframe determined as an FBS based on the FBS-related information,

wherein the FBS-related information indicates at least one subframe of which transmission power of a downlink control region and a downlink data region is set to zero (0),

wherein the FBS-related information is determined based on ABS (almost blank subframe) pattern information of a second base station neighboring to the first base station,

wherein the FBS-related information comprises an overlapped subframe indicator, and

wherein the overlapped subframe indicator corresponds to information indicating whether at least one subframe designated as both an ABS and an FBS is to be determined as an ABS or an FBS.

12. The user equipment of claim 11, wherein the processor is configured to:

receive information on an interference measurement set based on the FBS-related information from the first base station, and

transmit a result measured in the interference measurement set to the first base station.