Method and apparatus for transmitting and receiving channel state information in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016204845-A1
Application number	US-201615075524-A
Country	US
Kind code	A1
Filing date	Mar 21, 2016
Priority date	Sep 18, 2012
Publication date	Jul 14, 2016
Grant date	—

Abstract

A method and an apparatus are provided for transmitting channel state information of a terminal is provided. A first Channel State Information Reference Signal (CSI-RS) and a second CSI-RS are received. Channel State Information (CSI) is generated based on both the first CSI-RS and the second CSI-RS. The CSI is transmitted.

First claim

What is claimed is:

1 . A method for transmitting channel state information in a terminal, the method comprising:
receiving, from a base station, first configuration information for a first channel state information reference signal (CSI-RS) and a second CSI-RS; receiving, from the base station, second configuration information for reporting channel state information (CSI), the second configuration information being associated with the first CSI-RS and the second CSI-RS; receiving, from the base station, the first CSI-RS and the second CSI-RS based on the first configuration information; generating the CSI based on the second configuration, the first CSI-RS, and the second CSI-RS; and reporting, to the base station, the CSI.

2 . The method of claim 1 , wherein the first CSI-RS and the second CSI-RS is for channel measurement.

3 . The method of claim 1 , wherein a characteristic of the first CSI-RS is different from a characteristic of the second CSI-RS.

4 . The method of claim 1 , wherein the CSI comprises a channel quality indicator (CQI), the CQI being calculated based on a first precoding matrix indicator (PMI) corresponding to the first CSI-RS and a second PMI corresponding to the second CSI-RS.

5 . The method of claim 4 , wherein the first PMI corresponds to the first CSI-RS and the second PMI corresponds to the second CSI-RS.

6 . A method for receiving channel state information in a base station, the method comprising:
configuring first configuration information for a first channel state information reference signal (CSI-RS) and a second CSI-RS; configuring second configuration information for reporting channel state information (CSI), the second configuration information being associated with the first CSI-RS and the second CSI-RS; transmitting, to a terminal, the first CSI-RS and the second CSI-RS based on the first configuration information; and receiving, from the terminal, the CSI based on the second configuration, the first CSI-RS, and the second CSI-RS.

7 . The method of claim 6 , wherein the first CSI-RS and the second CSI-RS is for channel measurement.

8 . The method of claim 6 , wherein a characteristic of the first CSI-RS is different from a characteristic of the second CSI-RS.

9 . The method of claim 6 , wherein the CSI comprises a channel quality indicator (CQI), the CQI being calculated based on a first precoding matrix indicator (PMI) corresponding to the first CSI-RS and a second PMI corresponding to the second CSI-RS.

10 . The method of claim 9 , wherein the first PMI corresponds to the first CSI-RS and the second PMI corresponds to the second CSI-RS.

11 . A terminal for transmitting channel state information, the terminal comprising:
a transceiver configured to transmit and receive a signal; and a controller configured to receive, from a base station, first configuration information for a first channel state information reference signal (CSI-RS) and a second CSI-RS, to receive, from the base station, second configuration information for reporting channel state information (CSI), the second configuration information being associated with the first CSI-RS and the second CSI-RS, to receive, from the base station, the first CSI-RS and the second CSI-RS based on the first configuration information, to generate the CSI based on the second configuration, the first CSI-RS, and the second CSI-RS, and to report, to the base station, the CSI.

12 . The terminal of claim 11 , wherein the first CSI-RS and the second CSI-RS is for channel measurement.

13 . The terminal of claim 11 , wherein a characteristic of the first CSI-RS is different from a characteristic of the second CSI-RS.

14 . The terminal of claim 11 , wherein the CSI comprises a channel quality indicator (CQI), the CQI being calculated based on a first precoding matrix indicator (PMI) corresponding to the first CSI-RS and a second PMI corresponding to the second CSI-RS.

15 . The terminal of claim 14 , wherein the first PMI corresponds to the first CSI-RS and the second PMI corresponds to the second CSI-RS.

16 . A base station for receiving channel state information, the base station comprising:
a transceiver configured to transmit and receive a signal; and a controller configured to configure first configuration information for a first channel state information reference signal (CSI-RS) and a second CSI-RS, to configure second configuration information for reporting channel state information (CSI), the second configuration information being associated with the first CSI-RS and the second CSI-RS, to transmit, to a terminal, the first CSI-RS and the second CSI-RS based on the first configuration information, and to receive, from the terminal, the CSI based on the second configuration, the first CSI-RS, and the second CSI-RS.

17 . The base station of claim 16 , wherein the first CSI-RS and the second CSI-RS is for channel measurement.

18 . The base station of claim 16 , wherein a characteristic of the first CSI-RS is different from a characteristic of the second CSI-RS.

19 . The base station of claim 16 , wherein the CSI comprises a channel quality indicator (CQI), the CQI being calculated based on a first precoding matrix indicator (PMI) corresponding to the first CSI-RS and a second PMI corresponding to the second CSI-RS.

20 . The base station of claim 19 , wherein the first PMI corresponds to the first CSI-RS and the second PMI corresponds to the second CSI-RS.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Younsun
• Lee Hyojin
• Ji Hyoungju
• Lee Juho
• Cho Joonyoung

Classifications

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04B7/063

  Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title