METHOD FOR PERFORMING BEAMFORMING BASED ON PARTIAL ANTENNA ARRAY IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

• US 20160072572A1
• Filed: 06/25/2014
• Published: 03/10/2016
• Est. Priority Date: 06/25/2013
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KANG, Jiwon, CHUNG, Jaehoon, LEE, Kilbom, LEE, Kyunghaeng, KO, Hyunsoo
• Application Number:
  US14/888,330
• Publication Number:
  US 20160072572A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• 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: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04B 7/0802 using antenna selection H04B7/0868 takes precedence; antenna beam directivity switching H01Q3/24
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams

Abstract

A method for receiving a signal from a base station by a user equipment using beamforming based on a massive antenna array in a wireless communication system is disclosed. The method includes configuring a preferred antenna port set among a plurality of antenna ports included in the massive antenna array, measuring channel state information by receiving a reference signal corresponding to the preferred antenna port set and reporting the channel state information to the base station, and receiving a beam-formed signal from the base station using the preferred antenna port set based on the channel state information.

Claims

1. A method for receiving a signal from a base station by a user equipment using beamforming based on a massive antenna array in a wireless communication system, the method comprising:

configuring a preferred antenna port set among a plurality of antenna ports included in the massive antenna array;

measuring channel state information by receiving a reference signal corresponding to the preferred antenna port set and reporting the channel state information to the base station; and

receiving a beamformed signal from the base station using the preferred antenna port set based on the channel state information.

2. The method according to claim 1, further comprising:

transmitting, to the base station, information about the preferred antenna port set including information about the number of antenna ports and indexes of antenna ports included in the preferred antenna port set.

3. The method according to claim 1, further comprising:

receiving, from the base station, information about the preferred antenna port set including information about the number of antenna ports and indexes of antenna ports included in the preferred antenna port set.

4. The method according claim 2, wherein the number of antenna ports and the indexes of antenna ports are determined based on at least one of mobility of the user equipment, a Doppler characteristic of a channel between the user equipment and the base station, a characteristic parameter of a channel matrix between the user equipment and the base station, and a signal-to-noise ratio of the channel.

5. The method according to claim 1, wherein the reference signal is a user equipment-specific reference signal.

11. The method according to claim 3, wherein the number of antenna ports and the indexes of antenna ports are determined based on at least one of mobility of the user equipment, a Doppler characteristic of a channel between the user equipment and the base station, a characteristic parameter of a channel matrix between the user equipment and the base station, and a signal-to-noise ratio of the channel.

6. A method for transmitting a signal to a user equipment by a base station using beamforming based on a massive antenna array in a wireless communication system, the method comprising:

configuring a preferred antenna port set for the user equipment among a plurality of antenna ports included in the massive antenna array;

transmitting a reference signal corresponding to the preferred antenna port set to the user equipment;

receiving channel state information measured based on the reference signal from the user equipment; and

transmitting a beamformed signal to the user equipment using the preferred antenna port set based on the channel state information.

7. The method according to claim 6, further comprising:

receiving, from the user equipment, information about the preferred antenna port set including information about the number of antenna ports and indexes of antenna ports included in the preferred antenna port set.

8. The method according to claim 6, further comprising:

transmitting, to the user equipment, information about the preferred antenna port set including information about the number of antenna ports and indexes of antenna ports included in the preferred antenna port set.

9. The method according to claim 7, wherein the number of antenna ports and the indexes of antenna ports are determined based on at least one of mobility of the user equipment, a Doppler characteristic of a channel between the user equipment and the base station, a characteristic parameter of a channel matrix between the user equipment and the base station, and a signal-to-noise ratio of the channel.

10. The method according to claim 6, wherein the reference signal is a user equipment-specific reference signal.

12. The method according to claim 8, wherein the number of antenna ports and the indexes of antenna ports are determined based on at least one of mobility of the user equipment, a Doppler characteristic of a channel between the user equipment and the base station, a characteristic parameter of a channel matrix between the user equipment and the base station, and a signal-to-noise ratio of the channel.