METHOD AND APPARATUS FOR SUPPORTING MULTIPLE CARRIERS

• US 20120039179A1
• Filed: 03/03/2010
• Published: 02/16/2012
• Est. Priority Date: 03/03/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Dongyoun, Kim, Mingyu, Ahn, Joon Kui, Lee, Jung Hoon, Yang, Suckchel
• Granted Patent: US 8,824,394 B2
• Time in Patent Office: Days
• US Class Current: 370/241
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

A method and apparatus supporting multiple carriers is provided. A user equipment receives a self-control format indicator (CFI) indicating a size of a control region of a first carrier by using the first carrier. The user equipment receives downlink control information (DCI) comprising a cross-CFI indicating a size of a control region of a second carrier over a first downlink control channel in the control region of the first carrier. The user equipment monitors a second downlink control channel in the control region of the second carrier.

Claims

1. A method of monitoring a control channel in a multiple carrier system, the method comprising:

receiving, at a user equipment, a self-control format indicator (CFI) indicating a size of a control region of a first carrier by using the first carrier;

receiving, at a user equipment, downlink control information (DCI) comprising a cross-CFI indicating a size of a control region of a second carrier over a first downlink control channel in the control region of the first carrier; and

monitoring, at a user equipment, a second downlink control channel in the control region of the second carrier.

2. The method of claim 1, wherein the DCI comprises a plurality of cross-CFIs for a plurality of carriers.

3. The method of claim 1, wherein the DCI further comprises a carrier indicator (CI) indicating an index of the second carrier.

4. The method of claim 3, wherein the DCI further comprises a downlink grant for resource allocation of a downlink data channel in a data region of the second carrier.

5. The method of claim 1, wherein the cross-CFI is masked to a cyclic redundancy check (CRC) of the DCI.

6. The method of claim 1, further comprising receiving from a base station whether the self-CFI is received.

7. A user equipment supporting multiple carriers, comprising:

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

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

receive a self-control format indicator (CFI) indicating a size of a control region of a first carrier by using the first carrier, receive downlink control information (DCI) comprising a cross-CFI indicating a size of a control region of a second carrier over a first downlink control channel in the control region of the first carrier, and monitor a second downlink control channel in the control region of the second carrier.

8. The user equipment of claim 7, wherein the DCI further comprises a carrier indicator (CI) indicating an index of the second carrier.

9. The user equipment of claim 8, wherein the DCI further comprises a downlink grant for resource allocation of a downlink data channel in a data region of the second carrier.