METHOD AND DEVICE FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20150139093A1
• Filed: 04/01/2013
• Published: 05/21/2015
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Inkwon, Seo, Hanbyul
• Granted Patent: US 9,660,783 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

The present invention according to one embodiment relates to a method for enabling a terminal to receive control information in a wireless communication system, and the method for receiving the control information comprises the step of attempting to decode a set of enhanced physical downlink control channel (EPDCCH) candidates according to each set level, wherein a minimum value among the values available as the set levels is set according to the amount of available resources for an EPDCCH within a physical resource block (PRB) pair that is attempting to decode.

Claims

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

attempting to decode a set of enhanced physical downlink control channel (EPDCCH) candidates at each of aggregation levels,

wherein a minimum value among values available as the aggregation levels is determined according to the amount of available resources for the EPDCCH in a physical resource block (PRB) pair for the decoding attempt.

2. The method according to claim 1, wherein the minimum value among values available as the aggregation levels when the amount of available resources for the EPDCCH is less than a predetermined value is set to be greater than the minimum value among values available as the aggregation levels when the amount of available resources for the EPDCCH is greater than the predetermined value.

3. The method according to claim 2, wherein the minimum value of the values available as the aggregation levels corresponds to 2 when the amount of available resources for the EPDCCH is less than the predetermined value and corresponds to 1 when the amount of available resources for the EPDCCH is greater than the predetermined value.

4. The method according to claim 2, wherein the values available as the aggregation levels when the amount of available resources for the EPDCCH is less than the predetermined value are 2, 4, 8 and 16 and the values available as the aggregation levels when the amount of available resources for the EPDCCH is greater than the predetermined value are 1, 2, 4 and 8.

5. The method according to claim 1, wherein the resources are resource elements (REs).

6. The method according to claim 1, wherein the PRB pair includes four enhanced control channel elements (ECCEs).

7. The method according to claim 6, wherein the ECCE includes available resources for the EPDCCH and resources unrelated to the EPDCCH.

8. The method according to claim 7, wherein the UE extracts and decodes only the available resources for the EPDCCH from the ECCE.

9. The method according to claim 7, wherein the UE receives information for determining the resources unrelated to the EPDCCH from a base station.

10. The method according to claim 9, wherein the information is received via higher layer signaling.

11. The method according to claim 7, wherein the UE excludes an ECCE of a PRB pair, on which at least one of a physical broadcast channel (PBCH) or a synchronization channel is transmitted, upon attempting decoding.

12. The method according to claim 1, wherein the PRB pair is included in any one of PRB pairs for localized EPDCCH transmission and PRB pairs for distributed EPDCCH transmission.

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

a reception module; and

a processor,

wherein the processor attempts to decode a set of enhanced physical downlink control channel (EPDCCH) candidates at each of aggregation levels and a minimum value among values available as the aggregation levels is determined according to the amount of available resources for the EPDCCH in a physical resource block (PRB) pair for the decoding attempt.