Apparatus and method of avoiding control channel blocking

• US 9,554,377 B2
• Filed: 11/15/2013
• Issued: 01/24/2017
• Est. Priority Date: 12/17/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suck Chel, Kim, Min Gyu, Ahn, Joon Kui, Seo, Dong Youn
• Primary Examiner(s): Wong, Warner
• Application Number:
  US14/081,384
• Publication Number:
  US 20140153506A1
• Time in Patent Office: 1,166 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• 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 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present application is directed to a wireless communication system and, more particularly, a method of processing a control channel at a user equipment in a wireless communication system using multiple carriers. The method comprises receiving a plurality of search spaces, wherein each search space comprises a plurality of control channel candidates and each search space is corresponding to respective carrier. The method also includes monitoring the control channel candidates for the control channel.

Claims

1. A method of receiving a control channel at a user equipment configured with a carrier indicator field (CIF) in a wireless communication system, the method comprising:

receiving a subframe including a plurality of search spaces, wherein each of the plurality of search spaces is configured for a respective component carrier indicated by a respective CIF value; and

monitoring control channel candidates in the plurality of search spaces,

wherein the control channel candidates correspond to two or more CIF values for a downlink control information (DCI) format size, and

wherein one of the control channel candidates with the DCI format size is monitored in any search space corresponding to any of the CIF values for the DCI format size.

2. The method of claim 1, wherein each of the control channel candidates further includes a cyclic redundancy check (CRC) scrambled by an identifier.

3. The method of claim 2, wherein the identifier includes a cell radio network temporary identifier (C-RNTI).

4. The method of claim 1, wherein the control channel candidates are discriminated using the CIF values.

5. A method of transmitting at a base station in a wireless communication system, the method comprising:

generating control channel candidates, wherein each of the control channel candidates includes a respective carrier indicator field (CIF) value; and

transmitting the control channel candidates via a plurality of search spaces in a subframe,

wherein the control channel candidates correspond to two or more CIF values for a downlink control information (DCI) format size, and

wherein one of the control channel candidates with the DCI format size is monitored in any search space corresponding to any of the CIF values for the DCI format size.

6. The method of claim 5, wherein each of the control channel candidates further includes a cyclic redundancy check (CRC) scrambled by an identifier.

7. The method of claim 6, wherein the identifier includes a cell radio network temporary identifier (C-RNTI).

8. The method of claim 5, wherein the control channel candidates are discriminated using the CIF values.

9. A user equipment configured with a carrier indicator field (CIF) for operating in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive a subframe including a plurality of search spaces, wherein each of the plurality of search spaces is configured for a respective component carrier indicated by a respective CIF value, and to monitor control channel candidates in the plurality of search spaces,

wherein the control channel candidates correspond to two or more CIF values for a downlink control information (DCI) format size, and

wherein one of the control channel candidates with the DCI format size is monitored in any search space corresponding to any of the CIF values for the DCI format size.

10. The user equipment of claim 9, wherein each of the control channel candidates further includes a cyclic redundancy check (CRC) scrambled by an identifier.

11. The user equipment of claim 10, wherein the identifier includes a cell radio network temporary identifier (C-RNTI).

12. The user equipment of claim 9, wherein the control channel candidates are discriminated using the CIF values.

13. A base station for use in a wireless communication system, the base station comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to generate control channel candidates, wherein each of the control channel candidates includes a respective carrier indicator field (CIF) value, and to transmit the control channel candidates via a plurality of search spaces in a subframe,

wherein the control channel candidates correspond to two or more CIF values for a downlink control information (DCI) format size, and

wherein one of the control channel candidates with the DCI format size is monitored in any search space corresponding to any of the CIF values for the DCI format size.

14. The base station of claim 13, wherein each of the control channel candidates further includes a cyclic redundancy check (CRC) scrambled by an identifier.

15. The base station of claim 14, wherein the identifier includes a cell radio network temporary identifier (C-RNTI).

16. The base station of claim 13, wherein the control channel candidates are discriminated using the CIF values.