Method and apparatus for acquiring control information in wireless communication system

• US 9,401,794 B2
• Filed: 11/07/2012
• Issued: 07/26/2016
• Est. Priority Date: 11/08/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Kyujin, Cho, Hangyu, Han, Seunghee, Ko, Hyunsoo
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Hsiung, Hai-Chang
• Application Number:
  US14/357,061
• Publication Number:
  US 20140301343A1
• Time in Patent Office: 1,357 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

A method for acquiring control information in a wireless communication system according to one embodiment of the present invention includes the steps of: receiving E-PDCCH (Enhanced-Physical Downlink Control Channel) configuration information from a base station (BS); and transmitting a confirmation response for the E-PDCCH configuration information. The terminal performs blind decoding for downlink control information in a common search space on a PDCCH (Physical Downlink Control Channel) resource region and a search space on the E-PDCCH during a predetermined period after transmitting the confirmation response.

Claims

1. A method for acquiring control information of a user equipment (UE) in a wireless communication system, the method comprising:

receiving Enhanced-Physical Downlink Control Channel (E-PDCCH) configuration information from a base station (BS); and

transmitting an acknowledgement/negative acknowledgment (ACK/NACK) response to the E-PDCCH configuration information,

wherein, during a predetermined time after the transmission of the ACK/NACK response, the user equipment (UE) performs blind decoding for downlink control information (DCI) in a common search space of a physical downlink control channel (PDCCH) resource region and in a search space of an E-PDCCH resource region,

wherein the DCI is received through the search space of the E-PDCCH resource region, and

wherein the predetermined time starts from a next subframe of a subframe in which the ACK/NACK response is transmitted, and ends at a subframe in which a response to the received DCI is transmitted.

2. The method according to claim 1, wherein the user equipment (UE) performs blind decoding only in a UE-specific search space of the PDCCH resource region during a time period ranging from a reception time of the E-PDCCH configuration information to a transmission time of the ACK/NACK response.

3. The method according to claim 1, wherein the user equipment (UE) performs blind decoding for downlink control information (DCI) only in a search space of the E-PDCCH resource region, after predetermined time duration.

4. The method according to claim 1, wherein the search space of the E-PDCCH resource region is any one of a common search space or a UE-specific search space.

5. The method according to claim 1, wherein the E-PDCCH configuration information includes specific information that informs the user equipment (UE) that downlink control information (DCI) will be transferred through the E-PDCCH resource region.

6. A method for transmitting control information of a base station (BS) in a wireless communication system, the method comprising:

transmitting Enhanced-Physical Downlink Control Channel (E-PDCCH) configuration information; and

receiving an acknowledgement/negative acknowledgement (ACK/NACK) response to the E-PDCCH configuration information,

wherein, during a predetermined time after the reception of the ACK/NACK response, the base station (BS) transmits downlink control information (DCI) in a common search space of a physical downlink control channel (PDCCH) resource region and in a search space of an E-PDCCH resource region,

and

wherein the predetermined time starts from a next subframe of a subframe in which the ACK/NACK response is received, and ends at a subframe in which a response to the transmitted DCI is received.

7. A method for acquiring control information of a user equipment (UE) in a wireless communication system, the method comprising:

receiving Enhanced-Physical Downlink Control Channel (E-PDCCH) configuration information from a base station (BS); and

transmitting an acknowledgement/negative acknowledgement (ACK/NACK) response to the E-PDCCH configuration information,

wherein, during a predetermined time after the transmission of the ACK/NACK response, the user equipment (UE) performs blind decoding for downlink control information (DCI) in a common search space of a physical downlink control channel (PDCCH) resource region and in a search space of an E-PDCCH resource region,

wherein the DCI is received through the search space of the PDCCH resource region,

wherein the predetermined time starts from a next subframe of a subframe in which the ACK/NACK response is transmitted, and ends at a subframe in which a response to the received DCI is transmitted.

8. The method according to claim 7, wherein the user equipment (UE) performs blind decoding only in a UE-specific search space of the E-PDCCH resource region during a time period ranging from a reception time of the PDCCH configuration information to a transmission time of the ACK/NACK response.

9. The method according to claim 7, wherein the user equipment (UE) performs blind decoding for downlink control information (DCI) only in a search space of the PDCCH resource region, after predetermined time duration.

10. The method according to claim 7, wherein the search space of the PDCCH resource region is any one of a common search space or a UE-specific search space.

11. The method according to claim 7, wherein the PDCCH configuration information includes specific information that informs the user equipment (UE) that downlink control information (DCI) will be transferred through the PDCCH resource region.

12. A method for transmitting control information of a base station (BS) in a wireless communication system, the method comprising:

transmitting Physical Downlink Control Channel (PDCCH) configuration information; and

receiving an acknowledgement/negative acknowledgement (ACK/NACK) response to the PDCCH configuration information,

wherein, during a predetermined time after the reception of the ACK/NACK response, the base station (BS) transmits downlink control information (DCI) in a common search space of an E-PDCCH resource region and in a search space of a PDCCH resource region,

and

wherein the predetermined time starts from a next subframe of a subframe in which the ACK/NACK response is received, and ends at a subframe in which a response to the transmitted DCI is received.