METHOD AND APPARATUS FOR RECONFIGURING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM

• US 20110269442A1
• Filed: 05/02/2011
• Published: 11/03/2011
• Est. Priority Date: 05/03/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Jin-Ho, LIM, Jun-Sung, HAN, Jung-Su, MOON, Hi-Chan
• Granted Patent: US 9,420,591 B2
• Time in Patent Office: Days
• US Class Current: 455/418
• 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 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method for receiving control information by a User Equipment (UE) in a wireless communication system is provided. The method includes monitoring channel quality of a control channel, determining whether reconfiguration of the control channel is needed, based on the channel quality of the control channel, if the reconfiguration of the control channel is needed, requesting an evolved Node B (eNB) to reconfigure the control channel, and receiving the control information through the reconfigured control channel.

Claims

1. A method for receiving control information by a User Equipment (UE) in a wireless communication system, the method comprising:

monitoring channel quality of a control channel;

determining whether reconfiguration of the control channel is needed, based on the channel quality of the control channel;

if the reconfiguration of the control channel is needed, requesting an evolved Node B (eNB) to reconfigure the control channel; and

receiving the control information through the reconfigured control channel.

2. The method of claim 1, wherein the reconfigured control channel is allocated to a region of an extended control channel in a data channel.

3. The method of claim 1, wherein the reconfigured control channel is allocated to another Carrier Component (CC) in carrier aggregation.

4. The method of claim 1, wherein the receiving of the control information comprises performing blind decoding on at least one of the control channel and the reconfigured control channel.

5. The method of claim 4, wherein the performing of the blind decoding comprises performing blind decoding on the reconfigured control channel using a specific aggregation level.

6. The method of claim 4, wherein the receiving of the control information comprises receiving, from the eNB, a response message to the request to reconfigure the control channel.

7. The method of claim 6, wherein the receiving of the control information comprises:

sending a confirmation message for the response message to the eNB; and

upon receiving the response message to the confirmation message from the eNB, performing blind decoding on the reconfigured control channel using an existing aggregation level.

8. The method of claim 7, further comprising:

upon receiving the response message to the confirmation message from the eNB, receiving the control information through the reconfigured control channel.

9. The method of claim 1, further comprising:

receiving from the eNB a threshold for reconfiguring the control channel; and

determining whether reconfiguration of the control channel is needed, by comparing the channel quality with the threshold.

10. A User Equipment (UE) for receiving control information in a wireless communication system, the UE comprising:

a transmission/reception unit for receiving control information from an evolved Node B (eNB), and for transmitting and receiving a message associated with reconfiguration of a control channel carrying the control information; and

a controller for monitoring channel quality of the control channel, for determining whether reconfiguration of the control channel is needed, based on the channel quality of the control channel, for requesting the eNB to reconfigure the control channel if the reconfiguration of the control channel is needed, and for receiving the control information through the reconfigured control channel.

11. The UE of claim 10, wherein the reconfigured control channel is allocated to a region of an extended control channel in a data channel.

12. The UE of claim 10, wherein the reconfigured control channel is allocated to another Carrier Component (CC) in carrier aggregation.

13. The UE of claim 10, wherein the controller receives the control information by performing blind decoding on at least one of the control channel and the reconfigured control channel.

14. The UE of claim 13, wherein the controller performs the blind decoding on the reconfigured control channel using a specific aggregation level.

15. The UE of claim 13, wherein the controller receives, from the eNB, a response message to the request to reconfigure the control channel.

16. The UE of claim 13, wherein the controller sends a confirmation message for the response message to the eNB, and upon receiving the response message to the confirmation message from the eNB, performs the blind decoding on the reconfigured control channel using an existing aggregation level.

17. The UE of claim 16, wherein upon the receiving of the response message to the confirmation message from the eNB, the controller receives the control information through the reconfigured control channel.

18. The UE of claim 10, wherein the controller receives from the eNB a threshold for reconfiguring the control channel, and determines whether reconfiguration of the control channel is needed, by comparing the channel quality with the threshold.

19. A method for transmitting control information by an evolved Node B (eNB) in a wireless communication system, the method comprising:

determining whether a message requesting reconfiguration of a control channel has been received from a User Equipment (UE);

upon receiving the message, allocating a reconfigured control channel to a region of an extended control channel in a data channel; and

transmitting the control information through the reconfigured control channel.

20. The method of claim 19, wherein the reconfigured control channel is allocated to another Carrier Component (CC) in carrier aggregation.

21. The method of claim 19, wherein the allocating of the reconfigured control channel comprises allocating the reconfigured control channel using a specific aggregation level.

22. The method of claim 19, further comprising:

sending a first response message to the message requesting reconfiguration of the control channel, to the UE; and

upon receiving a confirmation message for the first response message from the UE, sending a second response message to the confirmation message to the UE.

23. The method of claim 22, further comprising:

upon receiving the message requesting reconfiguration of the control channel, allocating the reconfigured control channel using a specific aggregation level; and

upon receiving the confirmation message for the first response message, allocating the reconfigured control channel using an existing aggregation level.

24. An evolved Node B (eNB) for transmitting control information in a wireless communication system, the eNB comprising:

a transmission/reception unit for transmitting control information to a User Equipment (UE), and for transmitting and receiving a message associated with reconfiguration of a control channel carrying the control information; and

a controller for determining whether a message requesting reconfiguration of the control channel has been received from the UE, for allocating a reconfigured control channel to a region of an extended control channel in a data channel upon receiving the message, and for transmitting the control information through the reconfigured control channel.

25. The eNB of claim 24, wherein the controller allocates the reconfigured control channel to another Carrier Component (CC) in carrier aggregation.

26. The eNB of claim 24, wherein the controller allocates the reconfigured control channel using a specific aggregation level.

27. The eNB of claim 24, wherein the controller sends a first response message to the message requesting reconfiguration of the control channel, to the UE, and upon receiving a confirmation message for the first response message from the UE, sends a second response message to the confirmation message to the UE.

28. The eNB of claim 27, wherein the controller allocates the reconfigured control channel using a specific aggregation level upon receiving the message requesting reconfiguration of the control channel, and allocates the reconfigured control channel using an existing aggregation level upon receiving a confirmation message for the first response message.