Method and apparatus for transceiving a downlink control channel in a wireless communication system

• US 9,516,636 B2
• Filed: 12/07/2012
• Issued: 12/06/2016
• Est. Priority Date: 12/07/2011
• Status: Expired due to Fees

• 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
• Primary Examiner(s): SHIVERS, ASHLEY L
• Application Number:
  US14/355,789
• Publication Number:
  US 20140286288A1
• Time in Patent Office: 1,460 Days
• Field of Search: None
• US Class Current: 1/1
• 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, by the base station, enhanced physical downlink control channel (E-PDCCH) allocation resource information, through a RRC (Radio Resource Control) message, indicating E-PDCCH resource regions in which one or more E-PDCCHs can be transmitted to the UE;

transmitting, by the base station, the one or more E-PDCCHs to the UE, wherein each of the one or more E-PDCCHs includes downlink control information (DCI) on a first E-PDCCH resource region,

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is a resource region that excludes the first E-PDCCH resource region, and

wherein the first E-PDCCH resource region is identified by blind decoding by the UE, and

wherein the DCI of each of the one or more E-PDCCHs includes information on a second E-PDCCH resource region other than the first E-PDCCH resource region.

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

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

4. 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.

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

6. The method according to claim 5, wherein the bitmap is configured at an enhanced-control channel element (E-CCE) level.

7. The method according to claim 5, wherein the bitmap is configured at a resource block level.

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

9. The method according to claim 8, wherein:

the plurality of partitions is a plurality of subbands, and

one subband includes a plurality of resource blocks.

10. The method according to claim 1, wherein the DCI of each of the one or more E-PDCCHs includes information on whether the second part of the E-PDCCH resource is used for another UE.

11. 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:

receiving, at the UE, enhanced-physical downlink control channel (E-PDCCH) allocation resource information, through a RRC (Radio Resource Control) message, indicating E-PDCCH resource regions in which one or more E-PDCCHs can be received, from the base station,

detecting the one or more E-PDCCHs on a first E-PDCCH resource region based on a blind decoding by the UE, wherein each of the one or more E-PDCCHs includes downlink control information (DCI); and

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is a resource region that excludes the first E-PDCCH resource region

wherein the DCI of each of the one or more E-PDCCHs includes information on a second E-PDCCH resource region other than the first E-PDCCH resource region.

12. The method according to claim 11, wherein the DCI of each of the one or more E-PDCCHs includes information on whether the second part of the E-PDCCH resource is used for another UE.

13. 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 that;

controls the transmission module to transmit enhanced physical downlink control channel (E-PDCCH) allocation resource information, through a RRC (Radio Resource Control) message, indicating E-PDCCH resource regions in which one or more E-PDCCHs can be transmitted to the UE,

and controls the transmission module to transmit the one or more E-PDCCHs to the UE,

wherein each of the one or more E-PDCCHs includes downlink control information (DCI) on a first E-PDCCH resource region,

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is a resource region that excludes the first E-PDCCH resource region, and

wherein the first E-PDCCH resource region is identified by blind decoding by the UE, and

wherein the DCI of each of the one or more E-PDCCHs includes information on a second E-PDCCH resource region other than the first E-PDCCH resource region.

14. The base station apparatus according to claim 13, wherein the DCI of each of the one or more E-PDCCHs includes information on whether the second part of the E-PDCCH resource is used for another UE.

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 that;

controls the reception module to receive enhanced-physical downlink control channel (E-PDCCH) allocation resource information, through a RRC (Radio Resource Control) message, indicating E-PDCCH resource regions in which one or more E-PDCCHs can be received, from the base station,

and to detect the one or more E-PDCCHs on a first E-PDCCH resource region based on a blind decoding, wherein each of the one or more E-PDCCHs includes downlink control information (DCI),

wherein a valid physical downlink shared channel (PDSCH) allocation resource region for the UE is a resource region that excludes the first E-PDCCH resource region, and

wherein the DCI of each of the one or more E-PDCCHs includes information on a second E-PDCCH resource region other than the first E-PDCCH resource region.

16. The UE apparatus according to claim 15, wherein the DCI of each of the one or more E-PDCCHs includes information on whether the second part of the E-PDCCH resource is used for another UE.