METHOD FOR CHANNEL-RELATED FEEDBACK AND APPARATUS FOR SAME

• US 20170338877A1
• Filed: 11/03/2015
• Published: 11/23/2017
• Est. Priority Date: 11/04/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YUM, Kunil, HWANG, Daesung, KIM, Kijun, YI, Yunjung
• Granted Patent: US 10,374,677 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/06 at the transmitting station
• 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 7/0636 Feedback format
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

In a method for performing, by a rank-restricted terminal, a downlink channel-related feedback in a wireless communication system according to an embodiment of the present invention, the method includes the steps of: measuring a downlink channel; and feeding back information for improving a coverage on the basis of the measured downlink channel value, wherein the information for improving the coverage may include a repetition level indicator for improving the coverage.

Claims

1. A method for performing reporting of information for coverage enhancement by a rank-limited terminal in a wireless communication system, the method comprising:

receiving a reporting configuration of the information for coverage enhancement;

measuring a downlink channel according to the reporting configuration; and

reporting the information for coverage enhancement determined based on a value of the measured downlink channel,

wherein the information for coverage enhancement comprises a repetition level indicator for coverage enhancement.

2. The method according to claim 1, wherein the information for coverage enhancement is transmitted in an instance for transmission of a rank indicator configured for the terminal.

3. The method according to claim 1, wherein the information for coverage enhancement comprises a repetition level indicator for downlink and a repetition level indicator for uplink

4. The method according to claim 1, wherein the information for coverage enhancement comprises a repetition level indicator for an individual physical channel.

5. The method according to claim 1, wherein the repetition level indicator comprises a repetition level for coverage enhancement or a repetition level offset for coverage enhancement.

6. The method according to claim 1, wherein the information for coverage enhancement has a higher priority than channel state information to be reported by the terminal.

7. The method according to claim 1, wherein a reporting of channel state information is dropped when the reporting of the information for coverage enhancement collides with reporting of the channel state information.

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

receiving downlink data transmitted using a coverage enhancement technique according to the information for coverage enhancement.

9. The method according to claim 1, wherein the reporting of the information for coverage enhancement is included and transmitted in a measurement report for a reference signal received power (RSRP) or a reference signal received quality (RSRQ).

10. A rank-limited terminal configured to perform reporting of information for coverage enhancement, the terminal comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein the processor is configured to;

receive a reporting configuration of the information for coverage enhancement;

measure a downlink channel according to the reporting configuration; and

report the information for coverage enhancement determined based on a value of the measured downlink channel,

wherein the information for coverage enhancement comprises a repetition level indicator for coverage enhancement.

11. The terminal according to claim 10, wherein the information for coverage enhancement is transmitted in an instance for transmission of a rank indicator configured for the terminal.

12. The terminal according to claim 10, wherein the information for coverage enhancement comprises a repetition level indicator for downlink and a repetition level indicator for uplink

13. The terminal according to claim 10, wherein the information for coverage enhancement comprises a repetition level indicator for an individual physical channel.

14. The terminal according to claim 10, wherein the repetition level indicator comprises a repetition level for coverage enhancement or a repetition level offset for coverage enhancement.

15. The terminal according to claim 10, wherein the information for coverage enhancement has a higher priority than channel state information to be reported by the terminal.

16. The terminal according to claim 10, wherein a reporting of channel state information is dropped when reporting of the information for coverage enhancement collides with reporting of the channel state information.

17. The terminal according to claim 10, wherein the processor is configured to receive downlink data transmitted using a coverage enhancement technique according to the information for coverage enhancement.

18. The terminal according to claim 10, wherein the reporting of the information for coverage enhancement is included and transmitted in a measurement report on a reference signal received power (RSRP) or a reference signal received quality (RSRQ).