Method for setting reference signal in multi-cell based wireless communication system and apparatus therefor

Patent metadata

Field	Value
Publication number	US-9537631-B2
Application number	US-201414440820-A
Country	US
Kind code	B2
Filing date	Mar 26, 2014
Priority date	Mar 27, 2013
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

Disclosed is a method for transmitting and receiving a signal, by a terminal, in a wireless communication system. More particularly, the method comprises the steps of receiving information about a plurality of reference signal resources from a base station; receiving information about one channel state information (CSI) process from the base station; and reporting CSI on the basis of the information about the one CSI process, wherein the information about the one CSI process comprises information indicative of at least one of the plurality of reference signal resources.

First claim

The invention claimed is:

1. A method for transmitting a channel status information (CSI) feedback to a base station (BS) at a user equipment (UE) in a wireless communication system, the method comprising:
configuring, via a radio resource control (RRC) layer, a CSI process comprising a specific number of channel measurement resources and a specific number of interference measurement resources having a one to one correspondence with the specific number of channel measurement resources;
generating the CSI feedback for the CSI process based on one channel measurement resource of the specific number of channel measurement resources and one interference measurement resource, corresponding to the one channel measurement resource, of the specific number of interference measurement resources; and
transmitting the CSI feedback for the CSI process to the BS.

2. The method of claim 1 , wherein reference signals corresponding to the specific number of channel measurement resources are quasi co-located.

3. The method of claim 1 , wherein the CSI process further comprises a specific number of parameters having a one to one correspondence with the specific number of channel measurement resources, each of the specific number of parameters indicating a power ratio of a data channel to corresponding channel measurement resource.

4. The method of claim 1 , wherein the channel measurement resources are defined by CSI-RS (channel status information-reference signal) resource element configuration with non-zero transmission power and the interference measurement resources are defined by the CSI-RS resource element configuration with zero transmission power.

5. The method of claim 1 , wherein generating the CSI feedback for the CSI process further comprises:
receiving a reference signal corresponding to the one channel measurement resource from the BS;
performing a channel measurement using the reference signal; and
performing an interference measurement using the one interference measurement resource,
wherein the CSI feedback is generated based on results of the channel measurement and the interference measurement.

6. The method of claim 1 , wherein reference signals corresponding to the channel measurement resources are beamformed differently with each other.

7. A user equipment (UE) in a wireless communication system, the UE comprising:
a radio frequency (RF) unit that receives, via a radio resource control (RRC) layer from a base station (BS), information on a channel status information (CSI) process comprising a specific number of channel measurement resources and Ma a specific number of interference measurement resources having a one to one correspondence with the specific number of channel measurement resources; and
a processor that generates a CSI feedback for the CSI process based on one channel measurement resource of the specific number of channel measurement resources and one interference measurement resource, corresponding to the one channel measurement resource, of the specific number of interference measurement resources.

8. The UE of claim 7 , wherein Ma reference signals corresponding to the specific number of channel measurement resources are quasi co-located.

9. The UE of claim 7 , wherein the CSI process further comprises Ma a specific number of parameters having a one to one correspondence with the specific number of channel measurement resources, each of the specific number of parameters indicating a power ratio of a data channel to corresponding channel measurement resource.

10. The UE of claim 7 , wherein the channel measurement resources are defined by CSI-RS (channel status information-reference signal) resource element configuration with non-zero transmission power and the interference measurement resources are defined by the CSI-RS resource element configuration with zero transmission power.

11. The UE of claim 7 , wherein the processor further: performs a channel measurement using a reference signal corresponding to the one channel measurement resource from the BS, and
performs an interference measurement using the one interference measurement resource,
wherein the CSI feedback for the CSI process is generated based on results of the channel measurement and the interference measurement.

12. The UE of claim 7 , wherein reference signals corresponding to the channel measurement resources are beamformed differently with each other.

Assignees

• Lg Electronics Inc

Inventors

• Park Jonghyun
• Kim Kijun
• Seo Hanbyul

Classifications

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B7/0632

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

• H04W88/08

  Access point devices · CPC title

• H04B7/0417

  Feedback systems · CPC title