Method for reporting channel state information, method for supporting same, and apparatus for said methods

• US 10,084,583 B2
• Filed: 08/24/2017
• Issued: 09/25/2018
• Est. Priority Date: 02/11/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Jonghyun, Sohn, Illsoo, Kim, Kijun, Seo, Hanbyul
• Primary Examiner(s): Ghowrwal, Omar J
• Assistant Examiner(s): Detse, Kokou R
• Application Number:
  US15/685,454
• Publication Number:
  US 20170353282A1
• Time in Patent Office: 397 Days
• Field of Search: 370329
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/0014 Three-dimensional division time-code-space division H04B7/0413, H04B7/0697
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated

Abstract

A method for channel measurement based on a channel state information (CSI)-reference signal (RS) in a wireless communication system including receiving, by a terminal, CSI-RS resource configuration information through higher layer signaling and receiving, by the terminal, the CSI-RS according to the CSI-RS resource configuration information; wherein the CSI-RS resource configuration information includes information on one or more cell specific-RS (CRS) antenna ports assumed to be quasi-co-located with one or more antenna ports used to transmit the CSI-RS, and deriving, by the terminal, CSI based on the CSI-RS using the information on the one or more CRS antenna ports.

Claims

1. A method for channel measurement based on a channel state information (CSI)-reference signal (RS) in a wireless communication system, comprising:

receiving, by a terminal, CSI-RS resource configuration information through higher layer signaling and receiving, by the terminal, the CSI-RS according to the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on one or more cell specific-RS (CRS) antenna ports assumed to be quasi-co-located with one or more antenna ports used to transmit the CSI-RS; and

deriving, by the terminal, CSI based on the CSI-RS using the information on the one or more CRS antenna ports.

2. The method according to claim 1, wherein the information on the one or more CRS antenna ports is used to acquire a large-scale property of a radio channel from the one or more antenna ports used to transmit the CSI-RS.

3. The method according to claim 2, wherein the large-scale property of the radio channel from the one or more antenna ports used to transmit the CSI-RS is derived from a radio channel from an antenna port used to transmit the CRS.

4. The method according to claim 2, wherein the large-scale property of the radio channel includes at least one of delay spread, Doppler spread, Doppler shift, average gain and average delay.

5. The method according to claim 1, wherein the information on the one or more CRS antenna ports includes identification information about the CRS.

6. The method according to claim 1, wherein the terminal is configured in transmission mode 10.

7. The method according to claim 1, wherein the CSI-RS resource configuration information further includes information on one or more antenna ports used to transmit a demodulation reference signal (DMRS) assumed to be quasi-co-located with the antenna ports used to transmit the CSI-RS.

8. The method according to claim 1, wherein the CSI-RS and the CRS are transmitted from different cells.

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

reporting, by the terminal, the derived CSI.

10. A method for channel measurement based on a channel state information (CSI)-reference signal (RS) in a wireless communication system, comprising:

transmitting, by a base station, CSI-RS resource configuration information through higher layer signaling to a terminal and transmitting the CSI-RS according to the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on one or more cell specific-RS (CRS) antenna ports assumed to be quasi-co-located with one or more antenna ports used to transmit the CSI-RS; and

receiving, by the base station, CSI derived by the terminal based on the CSI-RS using the information on the one or more CRS antenna ports.

11. A terminal for channel measurement based on a channel state information (CSI)-reference signal (RS) in a wireless communication system, the terminal comprising:

a transmitter and a receiver; and

a processor that controls the transmitter and the receiver,

wherein the processor controls the receiver to receive CSI-RS resource configuration information through higher layer signaling and receive the CSI-RS according to the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on one or more cell specific-RS (CRS) antenna ports assumed to be quasi-co-located with one or more antenna ports used to transmit the CSI-RS, and

wherein the processor derives CSI based on the CSI-RS using the information on the one or more CRS antenna ports.

12. The terminal according to claim 11, wherein the information on the one or more CRS antenna ports is used to acquire a large-scale property of a radio channel from the one or more antenna ports used to transmit the CSI-RS.

13. The terminal according to claim 12, wherein the large-scale property of the radio channel from the one or more antenna ports used to transmit the CSI-RS is derived from a radio channel from an antenna port used to transmit the CRS.

14. The terminal according to claim 12, wherein the large-scale property of the radio channel includes at least one of delay spread, Doppler spread, Doppler shift, average gain and average delay.

15. The terminal according to claim 11, wherein the information on the one or more CRS antenna ports includes identification information about the CRS.

16. The terminal according to claim 11, wherein the terminal is configured in transmission mode 10.

17. The terminal according to claim 11, wherein the CSI-RS resource configuration information further includes information on one or more antenna ports used to transmit a demodulation reference signal (DMRS) assumed to be quasi-co-located with the antenna ports used to transmit the CSI-RS.

18. The terminal according to claim 11, wherein the CSI-RS and the CRS are transmitted from different cells.

19. The terminal according to claim 11, wherein the processor controls the transmitter to report the derived CSI.

20. A base station for channel measurement based on a channel state information (CSI)-reference signal (RS) in a wireless communication system, the base station comprising:

a transmitter and a receiver; and

a processor that controls the transmitter and the receiver,

wherein the processor controls the transmitter to transmit CSI-RS resource configuration information through higher layer signaling to a terminal and transmit the CSI-RS according to the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on one or more cell specific-RS (CRS) antenna ports assumed to be quasi-co-located with one or more antenna ports used to transmit the CSI-RS, and

wherein the processor controls the receiver to receive, from the terminal, CSI derived by the terminal based on the CSI-RS using the information on the one or more CRS antenna ports.