METHOD AND DEVICE FOR MONITORING CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM

• US 20120294248A1
• Filed: 12/15/2010
• Published: 11/22/2012
• Est. Priority Date: 12/15/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Dong Youn, Kim, Min Gyu, Yang, Suck Chel, Ahn, Joon Kui
• Granted Patent: US 9,294,934 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

Discloses are a method and device for monitoring a control channel in a wireless communication system. A user equipment receives a CFI (control format indicator), indicating a size of a control region within a subframe, via a first downlink control channel and confirms whether or not an extended control region is present in the subframe. If the extended control region is present in the subframe, the user equipment monitors a PDCCH (physical downlink control channel) within the control region and the extended control region.

Claims

1. A method for monitoring a control channel in a wireless communication system, the method comprising:

receiving a control format indicator (CFI) indicating a size of a control region in a subframe through a first downlink control channel;

determining whether an extended control region is present in the subframe; and

if the extended control region is present in the subframe, monitoring a physical downlink control channel (PDCCH) in the control region and the extended control region.

2. The method of claim 1, further comprising:

receiving extended control information regarding the extended control region in the subframe through a second downlink control channel in the control region,

and wherein whether the extended control region is present is determined based on the extended control information.

3. The method of claim 2, wherein the extended control information includes presence information regarding whether the extended control region is present.

4. The method of claim 2, wherein the extended control information includes resource allocation information regarding a resource to which the extended control region is allocated.

5. The method of claim 2, wherein the extended control information includes a cross-CFI indicating a size of a control region in a subframe of another component carrier.

6. The method of claim 2, wherein if the CFI indicates a specific value, the extended control information is received.

7. The method of claim 6, wherein if the CFI indicates a maximum size of the control region, the extended control information is received.

8. The method of claim 1, wherein if the CFI indicates a specific value, it is determined as that the extended control region is present.

9. The method of claim 1, wherein the second downlink control channel is detected by blind decoding.

10. A user equipment configured for monitoring a control channel in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit configured for transmitting and receiving a radio signal; and

a processor coupled to the RF unit, wherein the processor is configured for;

receiving a control format indicator (CFI) indicating a size of a control region in a subframe through a first downlink control channel;

determining whether an extended control region is present in the subframe; and

if the extended control region is present in the subframe, monitoring a physical downlink control channel (PDCCH) in the control region and the extended control region.

11. The user equipment of claim 10, wherein the processor is configured for receiving extended control information regarding the extended control region in the subframe through a second downlink control channel in the control region,

and wherein the processor is configured for determining whether the extended control region is present based on the extended control information.

12. The user equipment of claim 11, wherein the extended control information includes presence information regarding whether the extended control region is present.

13. The user equipment of claim 11, wherein the extended control information includes resource allocation information regarding a resource to which the extended control region is allocated.

14. The user equipment of claim 11, wherein if the CFI indicates a specific value, the extended control information is received.

15. The user equipment of claim 10, wherein if the CFI indicates a specific value, the processor is configured for determining as that the extended control region is present.