METHOD FOR REPORTING CHANNEL STATE INFORMATION, METHOD FOR SUPPORTING SAME, AND APPARATUS FOR SAID METHODS

• US 20150029966A1
• Filed: 02/08/2013
• Published: 01/29/2015
• 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
• Granted Patent: US 9,768,930 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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

According to one embodiment of the present invention, the method for receiving a channel state information (CSI)-reference signal (RS) from a wireless communication system by a user device comprises the steps of: receiving resource configuration information on the CSI-RS; and receiving the CSI-RS on the basis of the resource configuration information on the CIS-RS, wherein the resource configuration information on the CSI-RS includes information on a cell specific-RS (CRS) related to the CSI-RS, and the user device can assume that an antenna port related to information on the CRS and an antenna port used for transmitting CSI-RS corresponding to the resource configuration information on the CSI-RS are quasi co-located.

Claims

1. A method for receiving, by user equipment (UE), a channel state information (CSI)-reference signal (RS) in a wireless communication system, comprising:

receiving CSI-RS resource configuration information o; and

receiving the CSI-RS based on the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on a cell specific-RS (CRS) related to the CSI-RS, and

the UE assumes that an antenna port associated with the information on the CRS and an antenna port used to transmit the CSI-RS corresponding to the CSI-RS resource configuration information are quasi-co-located.

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

3. The method according to claim 2, wherein the large-scale property of the radio channel from the antenna port 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 1, wherein the information on the CRS includes identification information about the CRS.

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

6. The method according to claim 1, wherein the UE assumes that an antenna port used to transmit a demodulation reference signal (DMRS) and the antenna port used to transmit the CSI-RS identified by the CSI-RS resource configuration information are quasi-co-located with respect to large-scale properties of radio channels from the antenna ports.

7. The method according to claim 1, wherein the CSI-RS resource configuration information is received through higher layer signaling.

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 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.

10. A method for transmitting, by an enhanced node B (eNB), CSI-RS in a wireless communication system, comprising:

transmitting CSI-RS resource configuration information to a user equipment (UE); and

transmitting the CSI-RS based on the CSI-RS resource configuration information to the UE,

wherein the CSI-RS resource configuration information includes information on a CRS related to the CSI-RS, and

the UE assumes that an antenna port associated with the information on the CRS and an antenna port used to transmit the CSI-RS corresponding to the resource configuration information on the CSI-RS are quasi-co-located.

11. A user equipment (UE) configured to receive a CSI-RS in a wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein the processor is configured to receive CSI-RS resource configuration information and to receive the CSI-RS based on the CSI-RS resource configuration information,

wherein the CSI-RS resource configuration information includes information on a CRS related to the CSI-RS, and

the UE assumes that an antenna port associated with the information on the CRS and an antenna port used to transmit the CSI-RS corresponding to the CSI-RS resource configuration information are quasi-co-located.

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

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

14. The UE according to claim 11, wherein the information on the CRS includes identification information about the CRS.

15. The UE according to claim 11, wherein the UE is configured in transmission mode 10.

16. The UE according to claim 11, wherein the UE assumes that an antenna port used to transmit a demodulation reference signal (DMRS) and the antenna port used to transmit the CSI-RS identified by the CSI-RS resource configuration information are quasi-co-located with respect to large-scale properties of radio channels from the antenna ports.

17. The UE according to claim 11, wherein the CSI-RS resource configuration information is received through higher layer signaling.

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

19. The UE 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.

20. An enhanced Node B (eNB) configured to transmit a CSI-RS in a wireless communication system, comprising:

an RF unit; and

a processor configured to control the RF unit,

wherein the processor is configured to transmit CSI-RS resource configuration information to a UE and to transmit the CSI-RS based on the CSI-RS resource configuration information to the UE,

wherein the CSI-RS resource configuration information includes information on a CRS related to the CSI-RS, and

the UE assumes that an antenna port associated with the information on the CRS and an antenna port used to transmit the CSI-RS corresponding to the CSI-RS resource configuration information are quasi-co-located.