Method and apparatus for transreceiving channel state information in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016119099-A1
Application number	US-201414893501-A
Country	US
Kind code	A1
Filing date	Jul 25, 2014
Priority date	Jul 26, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

The present invention relates to a wireless communication system. A method for a terminal reporting channel state information (CSI) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a second cell, which is a serving cell and neighboring a first cell, resource block allocation information related to downlink data of the second cell; selecting, based on the resource block allocation information, either a first interface measurement resource (IMR) in which interference from the second cell is present or a second IMR in which interference from the second cell is absent; and transmitting, to the first cell, a channel quality indicator (CQI) calculated based on the IMR which has been selected.

First claim

What is claimed is:

1 . A method for reporting a channel state information (CSI) by a user equipment in a wireless communication system, the method comprising:
receiving a resource block assignment information on downlink data of a second cell from the second cell adjacent to a first cell corresponding to a serving cell; selecting either a first IMR (interference measurement resource) having interference from the second cell or a second IMR without the interference from the second cell based on the resource block assignment information; and transmitting a CQI (channel quality indicator) calculated based on the selected IMR to the first cell.

2 . The method of claim 1 , further comprising:
receiving a DCI (downlink control information) including a 1-bit flag, wherein if the 1-bit flag corresponds to a first value, a remaining payload of the DCI comprises the resource block assignment information, and wherein if the 1-bit flag corresponds to a second value, the remaining payload of the DCI comprises a scheduling information.

3 . The method of claim 1 , further comprising:
transmitting an indication information on presence or non-presence of muting of the second cell to the first cell.

4 . The method of claim 3 ,
wherein the indication information is transmitted in a same subframe as the CQI.

5 . The method of claim 1 ,
wherein the resource block assignment information is determined as either a first pattern information to transmit data only in an even-numbered resource block and to perform muting on an odd-numbered resource block or a second pattern information to transmit the data only in the odd-numbered resource block and to perform the muting on the even-numbered resource block.

6 . The method of claim 1 ,
wherein the resource block assignment information is received through EPDCCH (Enhanced Physical Downlink Control Channel).

7 . The method of claim 1 ,
wherein after a second PMI is received from the second cell, the second PMI is transmitted to the first cell through a first PUSCH (Physical Uplink Shared Channel).

8 . A user equipment for reporting a CSI (Channel State Information) in a wireless communication system, the user equipment comprising:
a radio frequency (RF) unit; and a processor, wherein the processor is configured: to receive a resource block assignment information on downlink data of a second cell from the second cell adjacent to a first cell corresponding to a serving cell, to select either a first IMR (Interference Measurement Resource) having an interference from the second cell or a second IMR without the interference from the second cell based on the resource block assignment information, and to transmit a CQI (Channel Quality Indicator) calculated based on the selected IMR to the first cell.

9 . The user equipment of claim 8 ,
wherein the processor is further configured to receive a DCI (downlink control information) including a 1-bit flag, wherein if the 1-bit flag corresponds to a first value, a remaining payload of the DCI comprises the resource block assignment information, and wherein if the 1-bit flag corresponds to a second value, the remaining payload of the DCI comprises a scheduling information.

10 . The user equipment of claim 8 ,
wherein the processor is further configured to transmit an indication information on presence or non-presence of muting of the second cell to the first cell.

11 . The user equipment of claim 10 ,
wherein the indication information is transmitted in a same subframe as the CQI.

12 . The user equipment of claim 8 ,
wherein the resource block assignment information is determined as either a first pattern information to transmit data only in an even-numbered resource block and to perform muting on an odd-numbered resource block or a second pattern information to transmit the data only in the odd-numbered resource block and to perform the muting on the even-numbered resource block.

13 . The user equipment of claim 8 ,
wherein the resource block assignment information is received through EPDCCH (Enhanced Physical Downlink Control Channel).

14 . The user equipment of claim 8 ,
wherein after a second PMI is received from the second cell, the second PMI is transmitted to the first cell through a first PUSCH (Physical Uplink Shared Channel).

Assignees

• Lg Electronics Inc

Inventors

• Kim Hyungtae
• Park Jonghyun
• Seo Hanbyul

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0057

  Physical resource allocation for CQI · 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

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title