Method and apparatus for transmitting and receiving feedback information in mobile communication system using multiple antennas

• US 9,871,639 B2
• Filed: 02/28/2014
• Issued: 01/16/2018
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hyojin, Kim, Younsun, Kwak, Yongjun, Kim, Youngbum, Lee, Juho, Ji, Hyoungju
• Primary Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US14/193,741
• Publication Number:
  US 20140241274A1
• Time in Patent Office: 1,418 Days
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• 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 7/065 Variable contents, e.g. long-term or short-short
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI

Abstract

A method and an apparatus for transmitting/receiving feedback in a mobile communication system are provided. A method of configuring and receiving feedback information of an evolved Node B (eNB) includes transmitting configuration information on a plurality of reference signals including a first reference signal and a second reference signal to a User Equipment (UE); transmitting feedback configuration information including first feedback configuration information on the first reference signal and second feedback configuration information configured such that feedback information on the second reference signal is generated with reference to the first feedback configuration information to the UE; transmitting the reference signal to the UE according to the configuration information on the reference signal; and receiving feedback information including first feedback information according to the first feedback configuration information and second feedback information according to the second feedback configuration information from the UE.

Claims

1. A method in a mobile communication system, the method comprising:

transmitting a feedback configuration message including report mode information; and

receiving a feedback message including a channel quality indicator (CQI),

wherein the CQI is generated by using at least two channel status indication reference signal (CSI-RS) resource configurations when the feedback configuration message includes a type of multiple input multiple output (MIMO),

a precoding matrix indicator is determined based on codebook information associated with the type of MIMO, and

a rank indicator and the precoding matrix indicator are included in the feedback message based on the report mode information.

2. The method of claim 1, wherein the feedback configuration message further includes at least one CSI-RS resource configuration.

3. The method of claim 2, wherein the at least one CSI-RS resource configuration is associated with a number of antenna ports.

4. The method of claim 1, wherein a number of antenna ports associated with the CQI is determined based on a number of antenna ports associated with the at least two CSI-RS resource configurations.

5. The method of claim 1, wherein the precoding matrix indicator is selected within precoding matrixs defined by the codebook information.

6. A method in a mobile communication system, the method comprising:

receiving a feedback configuration message including report mode information; and

transmitting a feedback message including a channel quality indicator (CQI),

wherein the CQI is generated by using at least two channel status indication reference signal (CSI-RS) resource configurations when the feedback configuration message includes a type of multiple input multiple output (MIMO),

a precoding matrix indicator is determined based on codebook information associated with the type of MIMO, and

a rank indicator and the precoding matrix indicator are included in the feedback message based on the report mode information.

7. The method of claim 6, wherein the feedback configuration message further includes at least one CSI-RS resource configuration.

8. The method of claim 7, wherein the at least one CSI-RS resource configuration is associated with a number of antenna ports.

9. The method of claim 6, wherein a number of antenna ports associated with the CQI is determined based on a number of antenna ports associated with the at least two CSI-RS resource configurations.

10. The method of claim 6, wherein the precoding matrix indicator is selected within precoding matrixs defined by the codebook information.

11. An evolved Node B (eNB) in a mobile communication system, the eNB comprising:

a transceiver for transmitting and receiving signals; and

a controller configured to control to;

transmit a feedback configuration message including report mode information, and

receive a feedback message including a channel quality indicator (CQI),

wherein the CQI is generated by using at least two channel status indication reference signal (CSI-RS) resource configurations when the feedback configuration message includes a type of multiple input multiple output (MIMO),

a precoding matrix indicator is determined based on codebook information associated with the type of MIMO, and

a rank indicator and the precoding matrix indicator are included in the feedback message based on the report mode information.

12. The eNB of claim 11, wherein the feedback configuration message further includes at least one CSI-RS resource configuration.

13. The eNB of claim 12, wherein the at least one CSI-RS resource configuration is associated with a number of antenna ports.

14. The eNB of claim 11, wherein a number of antenna ports associated with the CQI is determined based on a number of antenna ports associated with the at least two CSI-RS resource configurations.

15. The eNB of claim 11, wherein the precoding matrix indicator is selected within precoding matrixs defined by the codebook information.

16. A user equipment (UE) in a mobile communication system, the UE comprising:

a transceiver for transmitting and receiving signals; and

a controller configured to control to;

receive a feedback configuration message including report mode information, and

transmit a feedback message including a channel quality indicator (CQI),

wherein the CQI is generated by using at least two channel status indication reference signal (CSI-RS) resource configurations when the feedback configuration message includes a type of multiple input multiple output (MIMO),

a precoding matrix indicator is determined based on codebook information associated with the type of MIMO, and

a rank indicator and the precoding matrix indicator are included in the feedback message based on the report mode information.

17. The UE of claim 16, wherein the feedback configuration message further includes at least one CSI-RS resource configuration.

18. The UE of claim 17, wherein the at least one CSI-RS resource configuration is associated with a number of antenna ports.

19. The UE of claim 16, wherein a number of antenna ports associated with the CQI is determined based on a number of antenna ports associated with the at least two CSI-RS resource configurations.

20. The UE of claim 16, wherein the precoding matrix indicator is selected within precoding matrixs defined by the codebook information.