Method for performing antenna shuffling using partial antenna array based beamforming in wireless communication system, and apparatus therefor

Patent metadata

Field	Value
Publication number	US-9525476-B2
Application number	US-201414902792-A
Country	US
Kind code	B2
Filing date	Jun 24, 2014
Priority date	Jul 30, 2013
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A method for receiving a signal from a base station by a user equipment, using massive antenna array based beamforming of the base station in a wireless communication system is disclosed. The method includes receiving, from the base station, antenna shuffling information corresponding to a preferred antenna port set among a plurality of antenna ports included in the massive antenna array, measuring channel state information according to the antenna shuffling information and reporting the channel state information to the base station, and receiving, from the base station, a beamformed signal using the preferred antenna port set based on the channel state information, wherein the antenna shuffling information includes at least one of information about a start index of antenna ports included in the preferred antenna port set and information about a direction to which antenna port indexes are allocated.

First claim

The invention claimed is:

1. A method for receiving a signal from a base station by a user equipment, using massive antenna array based beamforming of the base station in a wireless communication system, the method comprising:
receiving, from the base station, antenna shuffling information corresponding to a preferred antenna port set among a plurality of antenna ports included in the massive antenna array;
measuring channel state information according to the antenna shuffling information and reporting the channel state information to the base station; and
receiving, from the base station, a beamformed signal using the preferred antenna port set based on the channel state information,
wherein the antenna shuffling information includes at least one of information about a start index of antenna ports included in the preferred antenna port set and information about a direction to which antenna port indexes are allocated.

2. The method according to claim 1 , wherein the information about a direction to which antenna port indexes are allocated is information indicating whether antenna port indexes corresponding to the number of the antenna ports included in the preferred antenna port set is allocated in a forward direction or a backward direction from the start index of the antenna ports.

3. The method according to claim 1 , wherein the antenna shuffling information further includes information indicating a rule for reordering a plurality of antenna ports included in the massive antenna array.

4. The method according to claim 1 , further comprising transmitting information about the number of the antenna ports included in the preferred antenna port set to the base station.

5. The method according to claim 1 , further comprising receiving information about the number of the antenna ports included in the preferred antenna port set from the base station.

6. The method according to claim 1 , further comprising receiving a reference signal from the base station through the preferred antenna port set, wherein the channel state information is measured based on the reference signal.

7. A method for transmitting a signal to a user equipment by a base station, using massive antenna array based beamforming of the base station in a wireless communication system, the method comprising:
transmitting, to the user equipment, antenna shuffling information corresponding to a preferred antenna port set among a plurality of antenna ports included in the massive antenna array;
receiving channel state information according to the antenna shuffling information from the user equipment; and
transmitting, to the user equipment, a beamformed signal using the preferred antenna port set based on the channel state information,
wherein the antenna shuffling information includes at least one of information about a start index of antenna ports included in the preferred antenna port set and information about a direction to which antenna port indexes are allocated.

8. The method according to claim 7 , wherein the information about a direction to which antenna port indexes are allocated is information indicating whether antenna port indexes corresponding to the number of the antenna ports included in the preferred antenna port set is allocated in a forward direction or a backward direction from the start index of the antenna ports.

9. The method according to claim 7 , wherein the antenna shuffling information further includes information indicating a rule for reordering a plurality of antenna ports included in the massive antenna array.

10. The method according to claim 7 , further comprising receiving information about the number of the antenna ports included in the preferred antenna port set from the user equipment.

11. The method according to claim 7 , further comprising transmitting information about the number of the antenna ports included in the preferred antenna port set to the user equipment.

12. The method according to claim 7 , further comprising transmitting a reference signal to the user equipment through the preferred antenna port set, wherein the channel state information is measured by the user equipment based on the reference signal.

Assignees

• Lg Electronics Inc

Inventors

• Kang Jiwon
• Lee Kilbom
• Ko Hyunsoo
• Chung Jaehoon

Classifications

• H04B7/0619

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B7/0691 Primary

  using subgroups of transmit antennas · CPC title

• H01Q1/246

  specially adapted for base stations · CPC title

• H01Q3/06

  over a restricted angle · CPC title