METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20130329686A1
• Filed: 03/14/2012
• Published: 12/12/2013
• Est. Priority Date: 03/14/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hakseong, Seo, Hanbyul, Yang, Suckchel
• Granted Patent: US 9,844,030 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 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 2001/0097 Relays
• 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 5/1469 using time-sharing
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein a method for receiving a downlink control channel in a communication device having a plurality of cells in a wireless communication system comprises the steps of: receiving a subframe containing a plurality of search space resources which are preset to transmit a plurality of downlink control channel candidates, wherein each search space resource corresponds to each cell; and monitoring said plurality of the control channel candidates from at least a portion of said plurality of the search space resources, for said downlink control channel, wherein among said plurality of the cells, if there are one or more specific cells in which downlink transmission is limited at said subframe, search space resources corresponding to said one or more specific cells are used to transmit downlink control channel candidates or downlink shared channels of other cells.

Claims

1. A method of receiving a downlink control channel at a communication apparatus configured with a plurality of cells in a wireless communication system, the method comprising:

receiving a subframe including a plurality of predetermined search space resources for transmitting a plurality of downlink control channel candidates, wherein each search space resource corresponds to each cell; and

monitoring the plurality of control channel candidates in at least some of the plurality of search space resources, for the downlink control channel,

wherein, if one or more specific cells on which downlink transmission is restricted in the subframe are present in the plurality of cells, one or more search space resources corresponding to the one or more specific cells are used to transmit downlink control channel candidates of other cells or a downlink shared channel.

2. The method according to claim 1, wherein, if the search space resources corresponding to the one or more specific cells are used to transmit the downlink control channel candidates of the other cells,

the downlink control channel candidates of the other cells are configured to have the same information size and the downlink control channel candidates having the same information size are distinguished using a carrier indicator field (CIF) value.

3. The method according to claim 1, wherein, if the search space resources corresponding to the one or more specific cells are used to transmit the downlink control channel candidates of the other cells,

the search spaces resources corresponding to the one or more specific cells are merged into a search space resource of a reference cell among the plurality of cells.

4. The method according to claim 3, wherein the resources in which the downlink control channel candidates are started are non-contiguously configured within the merged search space resource.

5. The method according to claim 1, wherein the subframe includes a plurality of orthogonal frequency division multiple access (OFDMA) symbols and the plurality of predetermined search space resources are set within OFDMA symbols other than the first M OFDMA symbols in the subframe and M is a positive integer.

6. The method according to claim 1, further comprising receiving resource block allocation information through a radio resource control (RRC) message,

wherein the resource block allocation information is used to indicate the plurality of predetermined search space resources.

7. A communication apparatus configured to receive a downlink control channel in a state in which a plurality of cells is configured in a wireless communication system, the communication apparatus comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive a subframe including a plurality of predetermined search space resources for transmitting a plurality of downlink control channel candidates, wherein each search space resource corresponds to each cell, and to monitor the plurality of control channel candidates in at least some of the plurality of search space resources for the downlink control channel,

wherein, if one or more specific cells on which downlink transmission is restricted in the subframe are present in the plurality of cells, one or more search space resources corresponding to the one or more specific cells are used to transmit downlink control channel candidates of other cells or a downlink shared channel.

8. The communication apparatus according to claim 7, wherein, if the search space resources corresponding to the one or more specific cells are used to transmit the downlink control channel candidates of the other cells,

the downlink control channel candidates of the other cells are configured to have the same information size and the downlink control channel candidates having the same information size are distinguished using a carrier indicator field (CIF) value.

9. The communication apparatus according to claim 7, wherein, if the search space resources corresponding to the one or more specific cells are used to transmit the downlink control channel candidates of the other cells,

the search spaces resources corresponding to the one or more specific cells are merged into a search space resource of a reference cell among the plurality of cells.

10. The communication apparatus according to claim 9, wherein the resources in which the downlink control channel candidates are started are non-contiguously configured within the merged search space resource.

11. The communication apparatus according to claim 7, wherein the subframe includes a plurality of orthogonal frequency division multiple access (OFDMA) symbols and the plurality of predetermined search space resources are set within OFDMA symbols other than the first M OFDMA symbols in the subframe and M is a positive integer.

12. The communication apparatus according to claim 7, wherein the processor is configured to receive resource block allocation information through a radio resource control (RRC) message, and

wherein the resource block allocation information is used to indicate the plurality of predetermined search space resources.