METHOD BY WHICH A TERMINAL RECEIVES ENHANCED DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME

• US 20150223211A1
• Filed: 09/11/2013
• Published: 08/06/2015
• Est. Priority Date: 09/16/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Daewon, Kim, Hakseong, Seo, Hanbyul
• Granted Patent: US 9,480,060 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• 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 72/00 Local resource management
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a method by which a terminal receives an enhanced downlink control channel in a wireless communication system, and to an apparatus for same. In detail, the method for detecting downlink control information includes the steps of receiving information about a specific subframe for an enhanced physical downlink control channel (EPDCCH), and monitoring the determined number of resource blocks according to available resource regions of the specific subframe in order to detect downlink control information, wherein, when the available resource region is restricted, the number of resource blocks is increased.

Claims

1. A method of receiving downlink control information by a user equipment in a wireless communication system, the method comprising the steps of:

receiving information related to a specific subframe for an enhanced physical downlink control channel (EPDCCH); and

receiving the downlink control information by monitoring the number of resource blocks determined in accordance with available resource regions of the specific subframe,

wherein, when the available resource regions are restricted, the number of resource blocks is increased.

2. The method according to claim 1, wherein the information on the specific subframe is received through higher layer signaling.

3. The method according to claim 1, wherein, when the resource regions are restricted, the resource blocks are configured in accordance with a distributed mode.

4. The method according to claim 3, wherein antenna ports allocated in association with the resource blocks are configured in accordance with a localized mode.

5. The method according to claim 3, wherein antenna ports allocated in association with the resource blocks are configured in accordance with a distributed mode.

6. The method according to claim 1, wherein the number of the resource blocks is additionally increased on the basis of a predetermined value defined in accordance with an aggregation level if the available resource regions are restricted.

7. The method according to claim 1, wherein the number of the resource blocks is increased to a multiple of the number of available orthogonal frequency division multiplexing (OFDM) symbols if the available resource regions are restricted.

8. The method according to claim 1, wherein the information on the specific subframe includes at least one of the number of OFDM symbols for the EPDCCH, the number of the resource blocks, and locations of the resource blocks.

9. The method according to claim 1, wherein a location of a demodulation reference signal (DM-RS) at the specific subframe number is changed if the available resource regions are restricted.

10. The method according to claim 1, wherein the resource regions include at least one OFDM symbol.

11. The method according to claim 1, wherein the specific subframe includes at least one of a downlink pilot time slot (DwPTS), a positioning reference signal (PRS), and a physical multicast channel (PMCH).

12. A user equipment for receiving downlink control information in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive information on a specific subframe for an enhanced physical downlink control channel (EPDCCH) and receive the downlink control information by monitoring the number of resource blocks determined in accordance with available resource regions of the specific subframe, and

when the available resource regions are restricted, the number of resource blocks is increased.