Method and apparatus for inter-cell interference coordination for transmission point group

• US 9,264,204 B2
• Filed: 08/16/2012
• Issued: 02/16/2016
• Est. Priority Date: 08/17/2011
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Kim, Kijun, Kim, Byounghoon
• Primary Examiner(s): Nguyen, Anh Ngoc
• Application Number:
  US14/238,670
• Publication Number:
  US 20140211734A1
• Time in Patent Office: 1,279 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 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04B 7/0452 Multi-user MIMO 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: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04J 2211/001 using small cells within macro cells, e.g. femto, pico or microcells
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• 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: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for inter-cell interference coordination for a transmission point group. The method for carrying out an interference coordination in a wireless communication system according to one embodiment of the present invention comprises a step for exchanging interference coordination messages between transmission point groups, wherein one transmission group comprises a plurality of transmission points, and the interference coordination message can comprises interference coordination information about each individual transmission point unit within the one transmission point group, and interference coordination information about the overall transmission point unit within the one transmission point group.

Claims

1. A method of performing interference coordination in a wireless communication system, comprising:

transmitting an interference coordination message, by a first transmission point groups, to a second transmission point group,

wherein one transmission point group comprises a plurality of transmission points,

wherein the interference coordination message is transmitted by at least one of the transmission points in the first transmission point group to a east one of the transmission points in the second transmission point group,

wherein the interference coordination message comprises an interference coordination information on a unit of an individual transmission point within the first transmission point group, an interference coordination information on a unit of all transmission points within the first transmission point group, an information on a total amount of transmit power of a plurality of the transmission points within the first transmission point group,

wherein the total amount of transmit power is determined based on a weighted value for plurality of the transmission points, and

wherein the weighted value is determined based on a distance between each of a plurality of the transmission points within the first at transmission point group and the second transmission point group.

2. The method of claim 1, wherein the interference coordination message further comprises identification information on the individual transmission point.

3. The method of claim 2, wherein the identification information comprises at least one selected from the group consisting of an identifier of the transmission point, an antenna port index of a reference signal, and a configuration index of a channel state information-reference signal.

4. The method of claim 2, wherein the transmission points within the one transmission point group comprise an identical cell identifier.

5. The method of claim 1, wherein allocation of the transmit power allocated to a plurality of the transmission points is controlled while the total amount of transmit power is maintained in the first transmission point group.

6. The method of claim 1, wherein a cooperative communication performed by a plurality of the transmission points within the first transmission point group is performed in case that a performance gain obtained by the joint transmission (JT) is higher than a performance loss due to the increase of the amount of interference.

7. The method of claim 1, wherein the interference coordination message comprises at least one selected from the group consisting of ABS (almost blank subframe) configuration information, ABS status information, RNTP (relative narrowband transmission power) information, IOI (interference overhead indication) information, and HII (high interference indication) information.

8. A device performing interference coordination in a wireless communication system, comprising:

a transmission module configured to transmit an interference coordination message to a different transmission point group;

a reception module configured to receive the interference coordination message from the different transmission point group; and

a processor configured to control the transmission module to transmit the interference coordination message to the different transmission point group,

wherein one transmission point group comprises a plurality of transmission points,

wherein the interference coordination message is transmitted to at least one of the transmission points in the different transmission point group,

wherein the interference coordination message comprises an interference coordination information on a unit of an individual transmission point within one transmission point group and the interference coordination information on a unit of all transmission points within the one transmission point group and an information on a total amount of transmit power of a plurality of the transmission points within the one transmission point group,

wherein the total amount of transmit power is determined based on a weighted value for a, plurality of the transmission points, and

wherein the weighted value is determined based on a distance between each of a plurality of the transmission points within the one transmission point group and a different transmission point group.