Method and apparatus for supporting synchronous HARQ transmission
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).
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.