Method for transceiving signals, and apparatus therefor

Patent metadata

Field	Value
Publication number	US-9319213-B2
Application number	US-201314395590-A
Country	US
Kind code	B2
Filing date	Apr 22, 2013
Priority date	Apr 20, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for a terminal to perform a HARQ process in which a scheduling cell of a first UL-DL configuration and a P-scheduling cell of a second TDD UL-DL configuration are set in a wireless communication system that supports carrier aggregation (CA), as well as to an apparatus for the method. The method comprises the steps of: receiving a UL grant through the scheduling cell; transmitting data corresponding to the UL grant through the P-scheduling cell according to the HARQ timing of a specific UL-DL configuration; and receiving data acknowledgement information through the scheduling cell according to the HARQ timing of the specific UL-DL configuration.

First claim

The invention claimed is:

1. A method for performing a hybrid automatic repeat request (HARQ) process by a UE for which a scheduling cell having a first uplink-downlink (UL-DL) configuration and a scheduled cell having a second TDD UL-DL configuration are configured in a wireless communication system, the method comprising:
receiving a UL grant through the scheduling cell;
transmitting, through the scheduled cell, data corresponding to the UL grant according to HARQ timing of a specific UL-DL configuration; and
receiving, through the scheduling cell, acknowledgement information for the data according to the HARQ timing of the specific UL-DL configuration,
wherein the HARQ timing of the specific UL-DL configuration includes UL grant reception in a first DL subframe (DL SF) followed by data transmission in a first UL SF followed by acknowledgement information or UL grant reception in a second DL SF followed by data transmission in a second UL SF followed by acknowledgement information/UL grant reception in a third DL SF followed by data transmission in a third UL SF,
wherein, when the scheduling cell is not a DL SF at the timing of the second DL SF, the HARQ timing of the specific UL-DL configuration is reset to include UL grant reception in the first DL SF followed by data transmission in the first UL SF followed by acknowledgement information/UL grant reception in the third DL SF followed by data transmission in the third UL SF.

2. The method according to claim 1 , wherein, when the scheduling cell is not a DL SF at the timing of the second DL SF, the second UL SF is reset to UL SF timing closest to the first UL SF, including the first UL SF, in the specific DL-UL configuration, the UL SF timing following the first UL SF.

3. The method according to claim 1 , wherein, when the scheduled cell is not a UL SF at the timing of the second UL SF, the HARQ timing of the specific UL-DL configuration is reset to include UL grant reception in the first DL SF followed by UL data transmission in the first UL SF followed by acknowledgement information reception in the second DL SF followed by UL grant reception in the third DL SF followed by data transmission in the third UL SF.

4. The method according to claim 3 , wherein, when the scheduled cell is not a UL SF at the timing of the second UL SF, the third DL SF is reset to DL SF timing closest to the second DL SF, including the second DL SF, in the specific UL-DL configuration, the DL SF timing following the second DL SF.

5. The method according to claim 1 , wherein subframe configurations according to the UL-DL configuration are defined as follows,

Uplink-downlink
Subframe number

configuration
0
1
2
3
4
5
6
7
8
9

0
D
S
U
U
U
D
S
U
U
U

1
D
S
U
U
D
D
S
U
U
D

2
D
S
U
D
D
D
S
U
D
D

3
D
S
U
U
U
D
D
D
D
D

4
D
S
U
U
D
D
D
D
D
D

5
D
S
U
D
D
D
D
D
D
D

6
D
S
U
U
U
D
S
U
U
D

wherein D denotes a downlink subframe, S denotes a special subframe and U denotes an uplink subframe.

6. The method according to claim 1 , wherein the specific UL-DL configuration is a UL-DL configuration having a smallest number of Us from among UL-DL configurations in which SFs, in which the scheduling cell or the scheduled cell corresponds to U, are all set to U.

7. A UE, for which a scheduling cell having a first uplink-downlink (UL-DL) configuration and a scheduled cell having a second TDD UL-DL configuration are configured, which is configured to perform a HARQ process, comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor is configured to receive a UL grant through the scheduling cell, to transmit, through the scheduled cell, data corresponding to the UL grant according to HARQ timing of a specific UL-DL configuration and to receive, through the scheduling cell, acknowledgement information for the data according to the HARQ timing of the specific UL-DL configuration,
wherein the HARQ timing of the specific UL-DL configuration includes UL grant reception in a first DL subframe (DL SF) followed by data transmission in a first UL SF followed by acknowledgement information or UL grant reception in a second DL SF followed by data transmission in a second UL SF followed by acknowledgement information/UL grant reception in a third DL SF followed by data transmission in a third UL SF,
wherein, when the scheduling cell is not a DL SF at the timing of the second DL SF, the HARQ timing of the specific UL-DL configuration is reset to include UL grant reception in the first DL SF followed by data transmission in the first UL SF followed by acknowledgement information/UL grant reception in the third DL SF followed by data transmission in the third UL SF.

8. The UE according to claim 7 , wherein, when the scheduling cell is not a DL SF at the timing of the second DL SF, the second UL SF is reset to UL SF timing closest to the first UL SF, including the first UL SF, in the specific DL-UL configuration, the UL SF timing following the first UL SF.

9. The UE according to claim 7 , wherein, when the scheduled cell is not a UL SF at the timing of the second UL SF, the HARQ timing of t

Assignees

• Lg Electronics Inc

Inventors

• Yang Suckchel
• Ahn Joonkui

Classifications

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W74/006

  in the downlink, i.e. towards the terminal · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04W74/04

  Scheduled access (hybrid access H04W74/02) · CPC title