METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20150181568A1
• Filed: 06/05/2013
• Published: 06/25/2015
• Est. Priority Date: 06/05/2012
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Inkwon, Seo, Hanbyul
• Application Number:
  US14/401,895
• Publication Number:
  US 20150181568A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• 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

Abstract

One embodiment of the present invention is a method in which a terminal receives control information through an Enhanced Physical Downlink Control Channel (EPDCCH) in a wireless communication system, the method comprising a step of trying EPDCCH decoding for each of a plurality of EPDCCH Physical Resource Block (PRB) sets. The terminal determines an EPDCCH-mapped resource element using a parameter set for each EPDCCH PRB set for each of the plurality of EPDCCH PRB sets when trying the decoding. The parameter set includes a Cell-specific Reference Signal (CRS)-related parameter, a Channel State Information-Reference Signal (CSI-RS)-related parameter, and a Physical Downlink Control Channel (PDCCH)-related parameter.

Claims

1. A method for receiving control information through an enhanced physical downlink control channel (EPDCCH) by a user equipment (UE) in a wireless communication system, the method comprising:

attempting to decode the EPDCCH in each of a plurality of EPDCCH physical resource block (PRB) sets,

wherein the UE determines a resource element for each of the plurality of EPDCCH PRB sets using a parameter set for each of the EPDCCH PRB sets in the attempting, the EPDCCH being mapped to the resource element,

wherein the parameter set comprises a cell-specific reference signal (CRS)-related parameter, a channel state Information-reference signal (CSI-RS)-related parameter, and a physical downlink control channel (PDCCH)-related parameter.

2. The method according to claim 1, wherein the CRS-related parameter comprises the number of antenna ports for a CRS, frequency shift information of the CRS, and multimedia broadcast single frequency network (MBSFN) subframe information.

3. The method according to claim 1, wherein the UE assumes that the EPDCCH is not mapped to resource elements related to the number of antenna ports for a CRS and frequency shift information of the CRS.

4. The method according to claim 1, wherein the CSI-RS-related parameter is a parameter is used to identify a zero power CSI-RS resource configuration.

5. The method according to claim 4, wherein the UE assumes that the EPDCCH is not mapped to a resource element related to the zero power CSI-RS resource configuration.

6. The method according to claim 1, wherein the PDCCH-related parameter comprises information about the number of OFDM symbols, a PDCCH being transmitted in the OFDM symbols.

7. The method according to claim 6, wherein the UE recognizes an OFDM symbol based on the PDCCH-related parameter, transmission of the PDSCH starting in the OFDM symbol.

8. The method according to claim 1, wherein the UE receives the parameter set through higher layer signaling.

9. The method according to claim 1, wherein the plurality of EPDCCH PRB sets is transmitted from a plurality of transmission points.

10. The method according to claim 9, wherein the plurality of transmission points is contained in a coordinate multi point (CoMP) cluster.

11. The method according to claim 1, wherein each of the plurality of EPDCCH PRB sets is configured for one of localized EPDCCH transmission and distributed EPDCCH transmission.

12. The method according to claim 1, wherein the plurality of EPDCCH PRB sets is configured by higher layer signaling.

13. A user equipment (UE) in a wireless communication system, comprising:

a receive module; and

a processor,

wherein the processor is configured to attempt to decode an enhanced physical downlink control channel (EPDCCH) for each of a plurality of EPDCCH physical resource block (PRB) sets, wherein the UE determines a resource element for each of the plurality of EPDCCH PRB sets using a parameter set for each of the EPDCCH PRB sets in attempting to decode the EPDCCH, the EPDCCH being mapped to the resource element, wherein the parameter set comprises a cell-specific reference signal (CRS)-related parameter, a channel state information-reference signal (CSI-RS)-related parameter, and a physical downlink control channel (PDCCH)-related parameter.