METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20150063236A1
• Filed: 03/22/2013
• Published: 03/05/2015
• Est. Priority Date: 03/22/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Inkwon, Seo, Hanbyul, Kim, Hakseong
• Granted Patent: US 9,445,413 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• 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
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission.

Claims

1. A method for receiving control information by a user equipment (UE) in a wireless communication system, comprising:

performing blind decoding on a plurality of resource units corresponding to each of at least one resource set,

wherein;

the resource units are resource units for an enhanced physical downlink control channel (EPDCCH) among resource units related to a downlink bandwidth; and

each of the at least one resource set is configured for one of localized EPDCCH transmission and distributed EPCCH transmission.

2. The method according to claim 1, wherein each of the resource units is a physical resource block (PRB) pair, and the resource set is a PRB set.

3. The method according to claim 1, wherein information indicating each of the at least one resource set is configured for either the localized EPDCCH transmission or the distributed EPCCH transmission is signaled to the UE through higher layer signaling.

4. The method according to claim 1, wherein determination of the resource units for the EPDCCH is based on information about a resource set delivered through higher layer signaling.

5. The method according to claim 1, wherein:

the at least one resource set comprises a first resource set configured for the localized EPDCCH transmission and a second resource set configured for the distributed EPDCCH transmission; and

when an overlapping resource unit included in both the first and second resource sets is present among the resource units for the EPDCCH, the UE considers only at least one antenna port other than at least one antenna port related to the distributed EPDCCH transmission as valid on the overlapping resource unit, among at least one antenna port related to the localized EPDCCH transmission.

6. The method according to claim 1, wherein:

the at least one resource set comprises a first resource set configured for the localized EPDCCH transmission and a second resource set configured for the distributed EPDCCH transmission; and

when an overlapping resource unit included in both the first and second resource sets is present among the resource units for the EPDCCH, the UE uses a pre-configured antenna port to perform blind decoding for a localized EPDCCH on the overlapping resource unit.

7. The method according to claim 6, wherein the pre-configured antenna port is delivered through higher layer signaling.

8. The method according to claim 5, wherein the at least one antenna port related to the localized EPDCCH transmission comprises antenna ports 107, 108, 109, and 110, and the at least one antenna port related to the distributed EPDCCH transmission comprises antenna ports 107 and 109.

9. The method according to claim 2, wherein the PRB pair comprises four enhanced control channel elements (ECCEs).

10. The method according to claim 9, wherein each of the ECCEs comprises four enhanced resource element groups (EREGs).

11. The method according to claim 10, wherein the localized EPDCCH transmission is based on at least one consecutive ECCE according to aggregation level.

12. The method according to claim 10, wherein the distributed EPDCCH transmission is based on an ECCE comprising EREGs belonging to PRB pairs.

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

a receive module; and

a processor,

wherein the processor performs blind decoding on a plurality of resource units corresponding to each of at least one resource set,

wherein the resource units are resource units for an enhanced physical downlink control channel (EPDCCH) among resource units related to a downlink bandwidth, and each of the at least one resource set is configured for one of localized EPDCCH transmission and distributed EPCCH transmission.