Method and apparatus for transmitting control information in wireless communication system

• US 10,015,002 B2
• Filed: 03/04/2016
• Issued: 07/03/2018
• 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
• Primary Examiner(s): Nowlin, Eric
• Application Number:
  US15/061,527
• Publication Number:
  US 20160191226A1
• Time in Patent Office: 851 Days
• 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:

determining a resource block (RB) pair set for a localized mapping, the RB pair set including a control channel element set; and

monitoring downlink control channel candidates on the control channel element set of the RB pair set in a subframe to detect the downlink control channel,

wherein the downlink control channel candidates include n^th and (n+1)^th downlink control channel candidates of an aggregation level,

wherein a spacing between starting positions of the n^th and (n+1)^th downlink control channel candidates of the aggregation level on the control channel element set depends on a number of control channel elements in the RB pair set, and

wherein RB pairs other than the RB pair set in a bandwidth are resources at least for physical downlink shared channel (PDSCH) transmission.

2. The method of claim 1, wherein the n^th and (n+1)^th downlink control channel candidates of the aggregation level are discontinuous on the control channel element set.

3. The method of claim 2, wherein each of the n^th and (n+1)^th downlink control channel candidates of the aggregation level consists of L consecutive control channel elements, and L represents the aggregation level.

4. The method of claim 1, wherein the 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 a starting OFDM symbol of the subframe.

5. The method of claim 1, wherein the downlink control channel candidates include enhanced physical downlink control channel (E-PDCCH) candidates, and the downlink control channel includes an E-PDCCH.

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

a radio frequency (RF) unit; and

a processor that;

determines a resource block (RB) pair set for a localized mapping, the RB pair set including a control channel element set, and monitors downlink control channel candidates on the control channel element set of the RB pair set in a subframe to detect the downlink control channel,

wherein the downlink control channel candidates include n^th and (n+1)^th downlink control channel candidates of an aggregation level,

wherein a spacing between starting positions of the n^th and (n+1)^th downlink control channel candidates of the aggregation level on the control channel element set depends on a number of control channel elements in the RB pair set, and

wherein RB pairs other than the RB pair set in a bandwidth are resources at least for physical downlink shared channel (PDSCH) transmission.

7. The communication apparatus of claim 6, wherein the n^th and (n+1)^th downlink control channel candidates of the aggregation level are discontinuous on the control channel element set.

8. The communication apparatus of claim 7, wherein each of the n^th and (n+1)^th downlink control channel candidates of the aggregation level consists of L consecutive control channel elements, and L represents the aggregation level.

9. The communication apparatus of claim 6, wherein the 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 a starting OFDM symbol of the subframe.

10. The communication apparatus of claim 6, wherein the downlink control channel candidates include enhanced physical downlink control channel (E-PDCCH) candidates, and the downlink control channel includes an E-PDCCH.