Apparatus and method of avoiding control channel blocking

• US 10,015,784 B2
• Filed: 12/14/2016
• Issued: 07/03/2018
• 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:
  US15/378,416
• Publication Number:
  US 20170094648A1
• Time in Patent Office: 566 Days
• 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

A method is provided of receiving a control channel at a user equipment in a wireless communication system. A subframe including a plurality of search spaces is received. Each of the plurality of search spaces is associated with a respective carrier indicator field (CIF) value. At least one control channel candidate for a cell indicated by a first CIF value is monitored in two or more of the plurality of search spaces for control channel candidates having a same downlink control information (DCI) format size and different CIF values.

Claims

1. A method of receiving a control channel at a user equipment 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 associated with a respective carrier indicator field (CIF) value; and

monitoring at least one control channel candidate for a cell indicated by a first CIF value in two or more search spaces of the plurality of search spaces for control channel candidates having a same downlink control information (DCI) format size and different CIF values.

2. The method according to claim 1, wherein the two or more search spaces of the plurality of search spaces do not include a search space associated with the first CIF value.

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

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

5. The method according to claim 1, wherein two or more control channel candidates are discriminated using the different CIF values.

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

generating the control channel, wherein a carrier indicator field (CIF) value in the control channel indicates that the control channel is for a carrier indicated by the CIF value; and

transmitting the control channel in two or more search spaces of a subframe,

wherein the two or more search spaces are for control channel candidates having different CIF values and a same downlink control information (DCI) format size.

7. The method according to claim 6, wherein the control channel further includes a cyclic redundancy check (CRC) scrambled by an identifier.

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

9. A user equipment for operating in a wireless communication system, the user equipment comprising:

a radio frequency (RF) module; and

a processor operably coupled with the RF module and configured to;

receive a subframe including a plurality of search spaces, wherein each of the plurality of search spaces is associated with a respective carrier indicator field (CIF) value, and

monitor at least one control channel candidate for a first cell indicated by a first CIF value in two or more search spaces of the plurality of search spaces for control channel candidates having different CIF values and a same downlink control information (DCI) format size.

10. The user equipment according to claim 9, wherein the two or more search spaces of the plurality of search spaces do not include a search space associated with the first CIF value.

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

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

13. The user equipment according to claim 9, wherein two or more control channel candidates are discriminated using the different CIF values.

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

a radio frequency (RF) module; and

a processor operably coupled with the RF module and configured to;

generate a control channel, wherein a carrier indicator field (CIF) value in the control channel indicates that the control channel is for a carrier indicated by the CIF value, and

transmit the control channel in two or more search spaces of a subframe,

wherein the two or more search spaces are for control channel candidates having different CIF values and a same downlink control information (DCI) format size.

15. The base station according to claim 14, wherein the control channel further includes a cyclic redundancy check (CRC) scrambled by an identifier.

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