Method for Setting Control Multi Point in Wireless Communication System and Apparatus Thereof

• US 20120021738A1
• Filed: 01/21/2010
• Published: 01/26/2012
• Est. Priority Date: 03/04/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Koo, Ja Ho, Ko, Hyun Soo, Ihm, Bin Chul, Lee, Wook Bong
• Granted Patent: US 8,688,105 B2
• Time in Patent Office: Days
• US Class Current: 455/422.1
• 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 1/0618 Space-time coding
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 2025/03808 Transmission of equaliser coefficients
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another

Abstract

The present invention relates to a method for setting a control multi point of a serving cell in a wireless communication system. The serving cell selects more than one adjacent base station as a control multi point set based on first link information between terminals and the adjacent base stations received from the terminals. Furthermore, the serving cell: receives a pre-coding matrix index corresponding to the adjacent base stations which is selected by the terminals, selects more than one pre-coding matrix index from the received pre-coding matrix indexes according to a preset condition, generates a pre-coding matrix index list, and transmits pre-coding matrix index list to the corresponding base station.

Claims

1. A method for setting a Coordinated Multi-Point (COMP) set of a serving enhanced Node B (eNB) in a wireless communication system, the method comprising:

receiving first associated information between neighbor eNBs and User Equipments (UEs) from the UEs;

selecting one or more neighbor eNBs from among the neighbor eNBs as a CoMP set based on the first associated information;

receiving precoding matrix indices corresponding respectively to the selected neighbor eNBs from the UEs;

selecting one or more precoding matrix indices from among the received precoding matrix indices according to a preset condition and generating a precoding matrix index list including the selected precoding matrix indices; and

transmitting the precoding matrix index list to a corresponding neighbor eNB.

2. The method according to claim 1, wherein selecting the one or more precoding matrix indices according to the preset condition includes selecting one or more precoding matrix indices whose reception frequencies are equal to or greater than a threshold from among the received precoding matrix indices.

3. The method according to claim 1, further comprising receiving second associated information between the selected neighbor eNBs and the UEs from the UEs at regular intervals or irregular intervals.

4. The method according to claim 3, wherein transmitting the precoding matrix index list to the corresponding neighbor eNB includes transmitting second associated information of the corresponding neighbor eNB together with the precoding matrix index list.

5. The method according to claim 3, wherein transmitting the precoding matrix index list to the corresponding neighbor eNB includes transmitting an average of first associated information and second associated information of the corresponding neighbor eNB together with the precoding matrix index list.

6. An enhanced Node B (eNB) apparatus in a wireless communication system, the eNB apparatus comprising:

a reception module for receiving precoding matrix indices and first associated information items of neighbor eNBs from UEs;

a processor including a Coordinated Multi-Point (COMP) selection module for selecting one or more neighbor eNBs to be included in a CoMP set from among the neighbor eNBs using the received first associated information items and a precoding matrix index list generation module for selecting one or more precoding matrix indices from among the received precoding matrix indices according to a preset condition and generating a precoding matrix index list including the selected precoding matrix indices; and

a transmission module for transmitting information of the selected neighbor eNBs to the UEs and transmitting the precoding matrix index list to a corresponding neighbor eNB.

7. The eNB apparatus according to claim 6, wherein selecting the one or more precoding matrix indices according to the preset condition includes selecting one or more precoding matrix indices whose reception frequencies are equal to or greater than a threshold from among the received precoding matrix indices.

8. The eNB apparatus according to claim 7, wherein the reception module receives second associated information between the selected neighbor eNBs and the UEs from the UEs at regular intervals or irregular intervals, the processor obtains an average of first associated information and second associated information of the corresponding neighbor eNB, and the transmission module transmits the average together with the precoding matrix index list to the corresponding neighbor eNB.