Method and apparatus for transmitting and receiving data

1. A method of receiving a downlink control channel by a user equipment (UE) in a wireless communication system, the method comprising: receiving a radio resource control (RRC) signal including redundant information of the downlink control channel from a base station (BS);

performing first blind decoding on a first downlink sub-frame in order to receive the downlink control channel;

performing second blind decoding on a second downlink sub-frame based on the redundant information in order to again receive the downlink control channel that is repeated in the second downlink sub-frame; and

transmitting repetitions of a physical uplink shared channel (PUSCH) on a plurality of uplink subframes based on repetition numbers,

wherein the redundant information includes information related to a number of times the downlink control channel is repeated in a plurality of downlink sub-frames including the first and second downlink sub-frames,

wherein the downlink control channel includes information related to a number of repetitions of the PUSCH, and

wherein the downlink control channel further includes a modulation and coding scheme (MCS) field that does indicate an MCS index value with a maximum of 10 for the UE.

2. The method of claim 1 , further comprising determining a control channel element (CCE) aggregation level for transmitting the downlink control channel,

wherein the second blind decoding is further performed based on the CCE aggregation level.

3. The method of claim 1 , further comprising determining a first downlink control information (DCI) candidate index used for transmitting the downlink control channel in the first downlink sub-frame,

wherein the second blind decoding is further performed based on a second DCI candidate index having a same value as the first DCI candidate index,

wherein the first DCI candidate index indicates a resource for transmitting the downlink control channel in the first downlink sub-frame, and

wherein the second DCI candidate index indicates a resource for transmitting the downlink control channel in the second downlink sub-frame.

4. The method of claim 1 , further comprising determining a first control channel element (CCE) region for transmitting the downlink control channel in the first downlink sub-frame,

wherein the second blind decoding is further performed on a second CCE region of the second downlink sub-frame, the second CCE region indicating a same resource allocation region as the first CCE region.

5. The method of claim 1 , further comprising receiving information from the BS that specifies a constraint aggregation level used to perform the first blind decoding and the second blind decoding.

6. The method of claim 1 , wherein receiving the RRC signal comprises:

determining whether an index included in the MCS field indicates the redundant information.

7. A user equipment (UE) receiving a downlink control channel in a wireless communication system, the UE comprising:

a radio frequency (RF) unit configured to receive information; and a processor configured to:

control the RF unit to receive a radio resource control (RRC) signal including redundant information of the downlink control channel from a base station (BS);

perform first blind decoding on a first downlink sub-frame in order to receive the downlink control channel;

perform second blind decoding on a second downlink sub-frame based on the redundant information in order to again receive the downlink control channel that is repeated in the second downlink sub-frame; and

control the RF unit to transmit repetitions of a physical uplink shared channel (PUSCH) on a plurality of uplink subframes based on repetition numbers,

wherein the redundant information includes information related to a number of times the downlink control channel is repeated in a plurality of downlink sub-frames including the first and second downlink sub-frames,

wherein the downlink control channel includes information related to a number of repetitions of the PUSCH, and

wherein the downlink control channel further includes a modulation and coding scheme (MCS) field that does indicate an MCS index value with a maximum of 10 for the UE.

8. The UE of claim 7 , wherein the processor is further configured to:

determine a control channel element (CCE) aggregation level for transmitting the downlink control channel; and

perform the second blind decoding based on the CCE aggregation level.

9. The UE of claim 7 , wherein the processor is further configured to:

determine a first downlink control information (DCI) candidate index used for transmitting the downlink control channel in the first downlink sub-frame; and

perform the second blind decoding based on a second DCI candidate index having a same value as the first DCI candidate index,

wherein the first DCI candidate index indicates a resource for transmitting the downlink control channel in the first downlink sub-frame, and

wherein the second DCI candidate index indicates a resource for transmitting the downlink control channel in the second downlink sub-frame.

10. The UE of claim 7 , wherein the processor is further configured to:

determine a first control channel element (CCE) region for transmitting the downlink control channel in the first downlink sub-frame; and

perform the second blind decoding on a second CCE region of the second downlink sub-frame, the second CCE region indicating a same resource allocation region as the first CCE region.

11. The UE of claim 7 , wherein the processor is further configured to receive information from the BS that specifies a constraint aggregation level and use the constraint aggregation level to perform the first blind decoding and the second blind decoding.

12. The UE of claim 7 , wherein receiving the RRC signal comprises:

determining whether an index included in the MCS field indicates the redundant information.