METHOD FOR TRANSMITTING SIGNAL IN MULTIPLE-ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME

• US 20170041057A1
• Filed: 04/14/2015
• Published: 02/09/2017
• Est. Priority Date: 04/14/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Youngtae, KIM, Kijun, PARK, Jonghyun
• Granted Patent: US 10,171,147 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0491 using two or more sectors, i.e. sector diversity
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/24 Reselection being triggered by specific parameters

Abstract

The present invention relates to a method and an apparatus for transmitting a signal of a first base station, for supporting a plurality of vertical directions in a wireless communication system which supports multiple antennas. Particularly, the method comprises the steps of: configuring a group so as to include at least one base station, among a plurality of base stations, for a first terminal having a position higher than those of the plurality of base stations; setting a specific sector for supporting coverage of the group; and determining whether to perform beamforming for the first terminal on the specific sector.

Claims

1. A method of transmitting a signal, by a first base station supporting a plurality of vertical beam directions in a wireless communication system supporting multiple antennas, comprising:

configuring a group containing at least one or more base stations for a first terminal of a location higher than locations of a plurality of base stations;

setting a specific sector for supporting coverage of the group; and

determining whether to perform beamforming for the first terminal on the specific sector.

2. The method of claim 1, if the beamforming for the first terminal is determined to be performed, further comprising:

transmitting information, which is transmitted by the first base station, indicating to perform the beamforming for the first terminal to a plurality of the base stations.

3. The method of claim 2, wherein if the information indicating to perform the beamforming for the first terminal is received from one of the plurality of base stations, the beamforming for the first terminal is configured to be terminated.

4. The method of claim 1, wherein the determining whether to perform the beamforming is determined based on information on whether or not beamforming to the first terminal is available received from at least one second base station contained in the group.

5. The method of claim 1, further comprising receiving a handover request of the first terminal from at least one second base station contained in the group.

6. The method of claim 1, wherein the determining whether to perform the beamforming comprises:

determining to perform the beamforming to the first terminal when traffic amount received from at least one second base station contained in the group is smaller than traffic amount of the first base station.

7. The method of claim 6, wherein the specific sector corresponds to a vertical sector which is determined according to the traffic amount of the first base station and the traffic amount of the second base station.

8. The method of claim 1, wherein the at least one or more base stations contained in the group are configured to have a CRS (cell-specific reference signal) of an identical identifier (ID).

9. The method of claim 1, wherein whether to perform the beamforming for the first terminal is configured to be periodically determined according to a predetermined period.

10. A method of transmitting a signal, which is transmitted by a first base station supporting a plurality of vertical beam directions in a wireless communication system supporting multiple antennas, comprising:

configuring a group containing at least one or more base stations for a first terminal targeted by a specific beam direction higher than a prescribed height among a plurality of the vertical beam directions among a plurality of base stations;

setting a specific sector for supporting coverage of the group; and

determining whether to perform beamforming for the first terminal on the specific sector.

11. A first base station supporting a plurality of vertical beam directions in a wireless communication system supporting multiple antennas, comprising:

a radio frequency unit; and

a processor, the processor configured to configure a group containing at least one or more base stations for a first terminal of a location higher than locations of a plurality of base stations, the processor configured to set a specific sector for supporting coverage of the group, the processor configured to determine whether to perform beamforming for the first terminal on the specific sector.