Method for Receiving Control Information in Wireless Communication System and Apparatus Therefor

• US 20110201333A1
• Filed: 12/02/2009
• Published: 08/18/2011
• Est. Priority Date: 12/04/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seung Hee, Kwon, Yeong Hyeon, Chung, Jae Hoon, Lee, Hyun Woo, Kim, So Yeon
• Granted Patent: US 8,463,262 B2
• Time in Patent Office: Days
• US Class Current: 455/434
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

A method of receiving a control signal by a user equipment in a wireless communication system is disclosed. The present invention includes receiving control regions including the control channel relevant to each of a plurality of component carriers via a plurality of component carriers and detecting the control channel for the user equipment by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in a search space included in the control regions. And, start positions of the search spaces in the plurality of component carriers is in a certain relationship. Moreover, the preset level is identically set for each of the plurality of component carriers.

Claims

1. A method of detecting a control channel by a user equipment in a wireless communication system, the method comprising the steps of:

receiving control regions including the control channel relevant to each of a plurality of component carriers via the plurality of component carriers; and

detecting the control channel by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in a search space included in the control regions.

2. The method of claim 1, wherein a start position of the search space is set by a certain scheme according to the plurality of component carriers.

3. The method of claim 1, the control channel detecting step comprising the steps of:

performing the blind decoding for a reference component carrier among the plurality of component carriers; and

performing the blind decoding for the rest of the plurality of component carriers except the reference component carrier,

wherein the blind decoding is performed for the rest of the plurality of component carriers except the reference component carrier using a search space having a size smaller than that of a search space successfully decoded for the reference component carrier.

4. The method of claim 1, wherein the preset level is identically set for each of the plurality of component carriers.

5. The method of claim 1, wherein the steps are related to carrier aggregation scheme.

6. A method of detecting control channels by a user equipment in a wireless communication system, the method comprising the steps of:

receiving a control region including control channels respectively relevant to a plurality of component carriers via one of the plurality of component carriers; and

detecting the control channels by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in an extended search space included in the control region.

7. The method of claim 6, wherein the steps are related to carrier aggregation scheme.

8. The method of claim 7, wherein the extended search space is formed by extending a size of a search space in a legacy system.

9. The method of claim 7, wherein the extended search space differs in size per corresponding aggregation level.

10. A user equipment, which performs communication using a plurality of component carriers, the user equipment comprising:

a radio frequency (RF) module configured to transmit or receive a signal via the plurality of component carriers; and

a processor configured to process the signal received from the RF module,

wherein the RF module receives control regions including a control channel relevant to each the plurality of component carriers via the plurality of component carriers and

wherein the processor detects the control channel by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in a control channel search space included in the control regions.

11. A user equipment, which performs communication using a plurality of component carriers, the user equipment comprising:

a radio frequency (RF) module configured to transmit or receive a signal via the plurality of component carriers; and

a processor configured to process the signal received from the RF module,

wherein the RF module receives a control region including control channels respectively relevant to the plurality of component carriers via one of the plurality of component carriers and

wherein the processor detects a control channel by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in an extended search space included in the control region.