Method and apparatus for transmitting and receiving data

1. An uplink transmission method, comprising:

transmitting a first acknowledgement/negative-acknowledgement (ACK/NACK) for downlink transmission of a primary cell (P-cell) to the P-cell through a first uplink ACK/NACK channel by a user equipment (UE); and

transmitting a second ACK/NACK for downlink transmission of a first secondary cell (S-cell) to the first S-cell through a second uplink ACK/NACK channel by the UE,

wherein the first uplink ACK/NACK channel is a channel assigned to an uplink frequency bandwidth of the P-cell, wherein the second uplink ACK/NACK channel is a channel assigned to an uplink frequency bandwidth of the first S-cell,

wherein at least one of the first uplink ACK/NACK channel and the second uplink ACK/NACK channel is an ACK/NACK semi-persistent scheduling (SPS) uplink channel semi-persistently assigned by a base station,

wherein the ACK/NACK SPS uplink channel is an ACK/NACK SPS physical uplink shared channel (PUSCH) or an ACK/NACK SPS physical uplink shared channel (PUCCH) assigned to an uplink data region, wherein the P-cell and the first S-cell have been carrier-aggregated, and wherein the first S-cell is activated by the P-cell,

wherein the first S-cell is set to a target cell and an uplink cell,

wherein the target cell is a cell that transmits an aggregation ACK/NACK signal obtained by aggregating an ACK/NACK signal for downlink transmission to an uplink channel of the uplink cell, and

wherein the uplink cell is a cell that transmits the aggregation ACK/NACK signal.

2. The method of claim 1 , further comprising:

when the first uplink ACK/NACK channel is the ACK/NACK SPS uplink channel, receiving resource allocation information of the first uplink ACK/NACK channel for transmitting the first ACK/NACK from the base station by the UE.

3. The method of claim 2 , further comprising:

when the second uplink ACK/NACK channel is the ACK/NACK SPS uplink channel, receiving resource allocation information of the second uplink ACK/NACK channel for transmitting the second ACK/NACK from the base station by the UE.

4. The method of claim 3 , further comprising:

receiving resource allocation information of the second uplink ACK/NACK channel for transmitting a third ACK/NACK for downlink transmission of a second S-cell from the base station by the UE; and

transmitting the third ACK/NACK to the first S-cell through the second uplink ACK/NACK channel by the UE, wherein the second S-cell has been carrier-aggregated with the P-cell and the first S-cell, and wherein the second S-cell is activated by the P-cell.

5. The method of claim 4 , wherein the second S-Cell is also set to the target cell.

6. The method of claim 4 ,

wherein the first uplink ACK/NACK channel is a channel assigned to an nth uplink sub-frame (n is a natural number) of the P-cell,

wherein the first ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the P-cell

wherein the k is a natural number more than 4 and is equal to or smaller than a transmission interval+4−1 of the first uplink ACK/NACK channel, and

wherein the transmission interval of the first uplink ACK/NACK channel is information regarding an interval on a time axis where the first uplink ACK/NACK channel is assigned.

7. The method of claim 4 ,

wherein the second uplink ACK/NACK channel is a channel assigned to an nth uplink sub-frame (n is a natural number) of the first S-cell,

wherein the second ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the first S-cell,

wherein the third ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the second S-cell,

wherein the k is a natural number more than 4 and is equal to or smaller than a transmission interval+4−1 of the second uplink ACK/NACK channel), and

wherein the transmission interval of the second uplink ACK/NACK channel is information regarding an interval on a time axis where the second uplink ACK/NACK channel is assigned.

8. A user equipment (UE) conducting uplink transmission in a wireless communication system, the UE comprising a processor,

wherein the processor is implemented to:

transmit a first acknowledgement/negative-acknowledgement (ACK/NACK) for downlink transmission of a primary cell (P-cell) to the P-cell through a first uplink ACK/NACK channel; and

transmit a second ACK/NACK for downlink transmission of a first secondary cell (S-cell) to the first S-cell through a second uplink ACK/NACK channel,

wherein the first uplink ACK/NACK channel is a channel assigned to an uplink frequency bandwidth of the P-cell,

wherein the second uplink ACK/NACK channel is a channel assigned to an uplink frequency bandwidth of the first S-cell,

wherein at least one of the first uplink ACK/NACK channel and the second uplink ACK/NACK channel is an ACK/NACK SPS (semi-persistent scheduling) uplink channel semi-persistently assigned by a base station,

wherein the ACK/NACK SPS uplink channel is an ACK/NACK SPS PUSCH (physical uplink shared channel) or an ACK/NACK SPS PUCCH (physical uplink shared channel) assigned to an uplink data region,

wherein the P-cell and the first S-cell have been carrier-aggregated, and wherein the first S-cell is activated by the P-cell,

wherein the first S-cell is set to a target cell and an uplink cell,

wherein the target cell is a cell that transmits an aggregation ACK/NACK signal obtained by aggregating an ACK/NACK signal for downlink transmission to an uplink channel of the uplink cell, and

wherein the uplink cell is a cell that transmits the aggregation ACK/NACK signal.

9. The UE of claim 8 ,

wherein, when the first uplink ACK/NACK channel is the ACK/NACK SPS uplink channel, the processor is implemented to receive resource allocation information of the first uplink ACK/NACK channel for transmitting the first ACK/NACK from the base station.

10. The UE of claim 9 ,

wherein, when the second uplink ACK/NACK channel is the ACK/NACK SPS uplink channel, the processor is implemented to receive resource allocation information of the second uplink ACK/NACK channel for transmitting the second ACK/NACK from the base station.

11. The UE of claim 10 ,

wherein the processor is implemented to receive resource allocation information of the second uplink ACK/NACK channel for transmitting a third ACK/NACK for downlink transmission of a second S-cell from the base station; and

transmit the third ACK/NACK to the first S-cell through the second uplink ACK/NACK channel, wherein the second S-cell has been carrier-aggregated with the P-cell and the first S-cell, and wherein the second S-cell is activated by the P-cell.

12. The UE of claim 11 , wherein the second S-Cell is also set to the target cell.

13. The UE of claim 11 ,

wherein the first uplink ACK/NACK channel is a channel assigned to an nth uplink sub-frame (n is a natural number) of the P-cell,

wherein the first ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the P-cell,

wherein the k is a natural number more than 4 and is equal to or smaller than a transmission interval+4−1 of the first uplink ACK/NACK channel), and

wherein the transmission interval of the first uplink ACK/NACK channel is information regarding an interval on a time axis where the first uplink ACK/NACK channel is assigned.

14. The UE of claim 11 ,

wherein the second uplink ACK/NACK channel is a channel assigned to an nth uplink sub-frame (n is a natural number) of the first S-cell,

wherein the second ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the first S-cell,

wherein the third ACK/NACK is an ACK/NACK for an n-kth downlink sub-frame of the second S-cell,

wherein the k is a natural number more than 4 and is equal to or smaller than a transmission interval+4−1 of the second uplink ACK/NACK channel, and

wherein the transmission interval of the second uplink ACK/NACK channel is information regarding an interval on a time axis where the second uplink ACK/NACK channel is assigned.