Method and apparatus for supporting synchronous HARQ transmission

• US 9,363,049 B2
• Filed: 04/23/2012
• Issued: 06/07/2016
• Est. Priority Date: 04/22/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Li, Yingyang, Sun, Chengjun
• Primary Examiner(s): Mills, Donald
• Assistant Examiner(s): Baron, Henry
• Application Number:
  US13/453,582
• Publication Number:
  US 20120269180A1
• Time in Patent Office: 1,506 Days
• Field of Search: 370/336
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

A method and apparatus for supporting synchronous Hybrid Automatic Repeat reQuest (HARQ) transmission of Uplink are disclosed. When uplink/downlink configurations of multiple CA cellsrrier Aggregation (CA) are different, by configuring the HARQ transmission timing relations of primary cell and secondary cell, it is guaranteed that, with cross-carrier scheduling, the timing relation between a transmission of PUSCH in the Pcell and subsequent retransmission of PUSCH in the Scell is the same as that in Long Term Evolution (LTE) and LTE Advanced (LTE-A).

Claims

1. A method for transmitting/receiving a signal in a user equipment (UE) in a wireless communication system supporting a hybrid automatic repeat request (HARQ) scheme, the method comprising:

receiving control information on a physical downlink control channel (PDCCH) in a primary cell at a predetermined downlink subframe; and

transmitting data on a physical uplink shared channel (PUSCH) at a first uplink subframe allocated in a secondary cell based on the received control information,

wherein the predetermined downlink subframe on the PDCCH is determined based on a type of a subframe in the primary cell posited at a same timing position with the first uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

2. The method of claim 1, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

3. The method of claim 1, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PDCCH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

4. The method of claim 1, further comprising:

receiving indication information on a physical HARQ indicator channel (PHICH) in the primary cell at a predetermined downlink subframe; and

retransmitting the data on the PUSCH at a second uplink subframe allocated in the secondary cell based on the received indication information,

wherein the predetermined downlink subframe on the PHICH is determined based on a type of a subframe in the primary cell posited at a same timing position with the second uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

5. The method of claim 4, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PHICH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

6. The method of claim 4, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PHICH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

7. A method for transmitting/receiving a signal in a base station (BS) in a wireless communication system supporting a hybrid automatic repeat request (HARQ) scheme, the method comprising:

transmitting control information on a physical downlink control channel (PDCCH) in a primary cell at a predetermined downlink subframe; and

receiving data on a physical uplink shared channel (PUSCH) at a first uplink subframe allocated in a secondary cell based on the control information,

wherein the predetermined downlink subframe on the PDCCH is determined based on a type of a subframe in the primary cell posited at a same timing position with the first uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

8. The method of claim 7, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PDCCH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

9. The method of claim 7, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PDCCH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

10. The method of claim 7, Further comprising:

transmitting indication information on a physical HARQ indicator channel (PHICH) in the primary cell at a predetermined downlink subframe; and

receiving the data on the PUSCH at a second uplink subframe allocated in a secondary cell based on the transmitted indication information,

wherein the predetermined downlink subframe on the PHICH is determined based on a type of a subframe in the primary cell posited at a same timing position with the second uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

11. The method of claim 10, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PHICH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

12. The method of claim 10, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PHICH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

13. A user equipment (UE) for transmitting/receiving a signal in a wireless communication system supporting a hybrid automatic repeat request (HARQ) scheme, comprising:

a receiver configured to receive control information on a physical downlink control channel (PDCCH) in a primary cell at a predetermined downlink subframe; and

a transmitter configured to transmit data on a physical uplink shared channel (PUSCH) at a first uplink subframe allocated in a secondary cell based on the received control information,

wherein the predetermined downlink subframe on the PDCCH is determined based on a type of a subframe in the primary cell posited at a same timing position with the first uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

14. The UE of claim 13, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PDCCH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

15. The UE of claim 13, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PDCCH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

16. The UE of claim 13, wherein the receiver receives indication information on a physical HARQ indicator channel (PHICH) in the primary cell at a predetermined downlink subframe, and the transmitter retransmits the data on the PUSCH at a second uplink subframe allocated in the secondary cell based on the received indication information, and

wherein the predetermined downlink subframe on the PHICH is determined based on a type of a subframe in the primary cell posited at a same timing position with the second uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

17. The UE of claim 16, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PHICH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

18. The UE of claim 16, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PHICH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

19. A base station (BS) for transmitting/receiving a signal in a wireless communication system supporting a hybrid automatic repeat request (HARQ) scheme, comprising:

a transmitter configured to transmit control information on a physical downlink control channel (PDCCH) in a primary cell at a predetermined downlink subframe; and

a receiver configured to receive data on a physical uplink shared channel (PUSCH) at a first uplink subframe allocated in a secondary cell based on the control information,

wherein the predetermined downlink subframe on the PDCCH is determined based on a type of a subframe in the primary cell posited at a same timing position with the first uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

20. The BS of claim 19, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PDCCH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

21. The BS of claim 19, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe on the PDCCH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.

22. The BS of claim 19, wherein the transmitter transmits indication information on a physical HARQ indicator channel (PHICH) in the primary cell at a predetermined downlink subframe, and the receiver receives the data on the PUSCH at a second uplink subframe allocated in a secondary cell based on the transmitted indication information,

wherein the predetermined downlink subframe on the PHICH is determined based on a type of a subframe in the primary cell posited at a same timing position with the second uplink subframe and at least one of a uplink/downlink configuration adopted in each of the primary cell and the secondary cell, and the uplink/downlink configuration adopted in the primary cell is different from the uplink/downlink configuration adopted in the secondary cell.

23. The BS of claim 22, when the type of the subframe in the primary cell is a uplink subframe, the predetermined downlink subframe on the PHICH is a downlink subframe allocated for scheduling of the uplink subframe in the primary cell.

24. The BS of claim 22, when the type of the subframe in the primary cell is a downlink subframe, the predetermined downlink subframe for the PHICH is determined among a plurality of uplink subframes allocated in the primary cell based on the uplink/downlink configuration adopted in each of the primary cell and the secondary cell.