METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM

• US 20140286288A1
• Filed: 12/07/2012
• Published: 09/25/2014
• Est. Priority Date: 12/07/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sungho, Chun, Jinyoung, Kim, Kitae, Kim, Sunam, Kang, Jiwon, Ihm, Binchul
• Granted Patent: US 9,516,636 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink control channel. According to one embodiment of the present invention, a method in which a base station transmits a downlink control channel to a terminal in a wireless communication system comprises the steps of: transmitting one or more enhanced-physical downlink control channels (E-PDCCHs) within a resource region allocable for an E-PDCCH; and transmitting E-PDCCH allocation resource information for the one or more E-PDCCHs to the terminal. The E-PDCCH allocation resource information indicates the resource in which the one or more E-PDCCHs exist from among the resource region allocable to the E-PDCCH. An effective physical downlink shared channel (PDSCH) allocation resource region for the terminal can be determined on the basis of the E-PDCCH allocation resource information.

Claims

1. A method for transmitting a downlink control channel by a base station to a user equipment (UE) in a wireless communication system, the method comprising:

transmitting one or more enhanced-physical downlink control channels (E-PDCCHs) in an E-PDCCH allocable resource region; and

transmitting E-PDCCH allocation resource information of the one or more E-PDCCHs to the UE,

wherein the E-PDCCH allocation resource information indicates resources in which the one or more E-PDCCHs are present in the E-PDCCH allocable resource region, and

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is determined based on the E-PDCCH allocation resource information.

2. The method according to claim 1, wherein the valid PDSCH allocation resource region is determined as a resource region except for a resource region in which the one or more E-PDCCHs are determined to be present based on the E-PDCCH allocation resource information in a PDSCH allocation resource region indicated by downlink control information provided via the E-PDCCH of the UE.

3. The method according to claim 1, wherein the one or more E-PDCCHs include a plurality of E-PDCCHs for a plurality of UEs participating in multiple user-multiple input multiple output (MU-MIMO).

4. The method according to claim 1, wherein the one or more E-PDCCHs include a plurality of E-PDCCHs of one UE.

5. The method according to claim 1, wherein, after the E-PDCCH allocation resource information is transmitted to the UE, an additional E-PDCCH for the UE is detected in a resource region in which the one or more E-PDCCHs are determined to be present based on the E-PDCCH allocation resource information.

6. The method according to claim 1, wherein the E-PDCCH allocation resource information is included in downlink control information transmitted via the E-PDCCH.

7. The method according to claim 1, wherein the E-PDCCH allocation resource information is provided to the UE via higher layer signaling.

8. The method according to claim 1, wherein the E-PDCCH allocation resource information is configured as a bitmap.

9. The method according to claim 8, wherein the bitmap is configured at an enhanced-control channel element (E-CCE) level.

10. The method according to claim 8, wherein the bitmap is configured at a resource block level.

11. The method according to claim 1, wherein, if downlink system bandwidth includes a plurality of partitions, the E-PDCCH allocable resource region is configured as a set of partial resource regions of each of the plurality of partitions.

12. The method according to claim 12, wherein:

the plurality of partitions is a plurality of subbands, and

one subband includes a plurality of resource blocks.

13. A method for receiving a downlink control channel by a user equipment (UE) from a base station in a wireless communication system, the method comprising:

detecting an enhanced-physical downlink control channel (E-PDCCH) in an E-PDCCH allocable resource region; and

receiving E-PDCCH allocation resource information from the base station,

wherein the E-PDCCH allocation resource information indicates resources, in which one or more E-PDCCHs are present, in the E-PDCCH allocable resource region, and

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is determined based on the E-PDCCH allocation resource information.

14. A base station apparatus for transmitting a downlink control channel to a user equipment (UE) in a wireless communication system, the base station apparatus comprising:

a reception module;

a transmission module; and

a processor,

wherein the processor is configured to transmit one or more enhanced-physical downlink control channels (E-PDCCHs) in an E-PDCCH allocable resource region using the transmission module and to transmit E-PDCCH allocation resource information of the one or more E-PDCCHs to the UE using the transmission module,

wherein the E-PDCCH allocation resource information indicates resources, in which the one or more E-PDCCHs are present, in the E-PDCCH allocable resource region, and

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is determined based on the E-PDCCH allocation resource information.

15. A user equipment (UE) apparatus for receiving a downlink control channel from a base station in a wireless communication system, the UE apparatus comprising:

a reception module;

a transmission module; and

a processor,

wherein the processor is configured to detect an enhanced-physical downlink control channel (E-PDCCH) in an E-PDCCH allocable resource region and to receive E-PDCCH allocation resource information from the base station using the reception module,

wherein the E-PDCCH allocation resource information indicates resources, in which one or more E-PDCCHs are present, in the E-PDCCH allocable resource region, and

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is determined based on the E-PDCCH allocation resource information.