METHOD AND APPARATUS FOR TRANSMITTING CQI IN WIRELESS COMMUNICATION SYSTEM

• US 20120044894A1
• Filed: 05/14/2010
• Published: 02/23/2012
• Est. Priority Date: 05/14/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyun Soo, Lee, Moon Il, Chung, Jae Hoon, Kim, So Yeon, Kwon, Yeong Hyeon
• Granted Patent: US 9,025,473 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

A method and apparatus for transmitting a channel quality indicator (CQI) in a wireless communication system are provided. The method includes: receiving a CQI request message requesting a CQI report over a first downlink component carrier; and transmitting a CQI for at least one second downlink component carrier over an uplink component carrier.

Claims

1. A method for transmitting a channel quality indicator (CQI), performed by a user equipment, in a wireless communication system, the method comprising:

receiving a CQI request message requesting a CQI report over a first downlink component carrier from a base station; and

transmitting a CQI for at least one second downlink component carrier over an uplink component carrier to the base station.

2. The method of claim 1, wherein the uplink component carrier is linked to the first downlink component carrier.

3. The method of claim 1, wherein the at least one second downlink component carrier is linked to the uplink component carrier.

4. The method of claim 1, wherein the at least one second downlink component carrier is the first downlink component carrier.

5. The method of claim 1, wherein the at least one second downlink component carrier is configured by radio resource control (RRC) signaling.

6. The method of claim 1, wherein the uplink component carrier is configured by RRC signaling.

7. The method of claim 1, wherein the uplink request message comprises a downlink component carrier information field indicating the at least one second downlink component carrier.

8. The method of claim 1, wherein the uplink request message comprises an uplink component carrier information field indicating the uplink component carrier.

9. The method of claim 1, wherein the first downlink component carrier is a primary downlink component carrier, and the uplink component carrier is a primary uplink component carrier.

10. The method of claim 1, wherein the at least one second downlink component carrier is selected by the user equipment.

11. The method of claim 1, wherein the uplink request message comprises a resource allocation field that allocates a radio resource for the CQI transmission.

12. The method of claim 11, wherein the number of the second downlink component carriers is determined according to a size of the radio resource allocated by the resource allocation field.

13. The method of claim 1, wherein the CQI request message is transmitted by being included in an uplink grant.

14. The method of claim 13, wherein the CQI for the at least one second downlink component carrier is transmitted based on the uplink grant.

15. A wireless communication apparatus comprising:

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

a processor coupled to the RF unit and configured for receiving a channel quality indicator (CQI) request message requesting a CQI report over a first downlink component carrier, and for transmitting a CQI for at least one second downlink component carrier over an uplink component carrier.