METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20140146768A1
• Filed: 06/28/2012
• Published: 05/29/2014
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Kim, Hakseong
• Granted Patent: US 9,312,993 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• 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 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention pertains to a wireless communication system, and more particularly, to a method of receiving a downlink (DL) control channel in a wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving a radio resource control (RRC) message including resource block (RB) allocation information; receiving a subframe having a plurality of physical RBs; and monitoring a plurality of downlink control channel candidates in a physical RB set corresponding to the RB allocation information from the plurality of physical RBs to detect a downlink control channel allocated to a communication device, wherein the plurality of downlink control channel candidates do not continuously exist in a virtual RB set corresponding to the physical RB set.

Claims

1. A method for receiving a downlink control channel by a communication device in a wireless communication system, the method comprising:

receiving a radio resource control (RRC) message including resource block (RB) allocation information;

receiving a subframe having a plurality of physical RBs; and

monitoring a plurality of downlink control channel candidates in a physical RB set corresponding to the RB allocation information from among the plurality of physical RBs to detect a downlink control channel allocated to the communication device,

wherein the plurality of downlink control channel candidates are non-consecutively present in a virtual RB set corresponding to the physical RB set.

2. The method according to claim 1, wherein the plurality of downlink control channel candidates are non-consecutively present in a plurality of sub-resources corresponding to the virtual RB set.

3. The method according to claim 1, wherein the plurality of downlink control channel candidates are consecutively present in a plurality of sub-resources corresponding to the virtual RB set in the order of indices,

wherein a plurality of sub-resources included in one virtual RB are non-sequentially indexed.

4. The method according to claim 3, wherein an index difference between sub-resources included in one virtual RB is proportional to the number of RBs included in the virtual RB set.

5. The method according to claim 1, wherein the plurality of downlink control channel candidates are present after a specific orthogonal frequency division multiplexing (OFDM) symbol in the subframe, and the specific OFDM symbol is not the first OFDM symbol of the subframe.

6. The method according to claim 1, wherein physical RBs other than the physical RB set from among the plurality of physical RBs are resources for physical downlink shared channel (PDSCH) transmission.

7. The method according to claim 1, wherein the downlink control channel includes an enhanced physical downlink control channel (E-PDCCH).

8. A communication apparatus for use in a wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive an RRC message including RB allocation information, to receive a subframe having a plurality of physical RBs and to monitor a plurality of downlink control channel candidates in a physical RB set corresponding to the RB allocation information from among the plurality of physical RBs to detect a downlink control channel allocated to the communication device,

wherein the plurality of downlink control channel candidates are non-consecutively present in a virtual RB set corresponding to the physical RB set.

9. The communication apparatus according to claim 8, wherein the plurality of downlink control channel candidates are non-consecutively present in a plurality of sub-resources corresponding to the virtual RB set.

10. The communication apparatus according to claim 8, wherein the plurality of downlink control channel candidates are consecutively present in a plurality of sub-resources corresponding to the virtual RB set in the order of indices,

wherein a plurality of sub-resources included in one virtual RB are non-sequentially indexed.

11. The communication apparatus according to claim 10, wherein an index difference between sub-resources included in one virtual RB is proportional to the number of RBs included in the virtual RB set.

12. The communication apparatus according to claim 8, wherein the plurality of downlink control channel candidates are present after a specific OFDM symbol in the subframe, and the specific OFDM symbol is not the first OFDM symbol of the subframe.

13. The communication apparatus according to claim 8, wherein physical RBs other than the physical RB set from among the plurality of physical RBs are resources for PDSCH transmission.

14. The communication apparatus according to claim 14, wherein the downlink control channel includes an E-PDCCH.