Method for transmitting and receiving uplink/downlink data with MTC device
A method is provided for transmitting uplink data. The method is performed by a machine type communication (MTC) device that transmits initially a bundle of repeated physical uplink shared channels (PUSCHs) including same uplink data to a base station on a plurality of uplink subframes, receives a hybrid automatic repeat request (HARQ) response signal from the base station in response to the bundle of repeated PUSCHs, receives an indication of a physical downlink shared channel (PDSCH) repetition number from the base station, determines a repetition number of a PUSCH including the same uplink data based on the indication, when the HARQ response signal is a negative-acknowledgement (NACK), and retransmits the bundle of repeated PUSCHs according to the determined repetition number of the PUSCH on the plurality of uplink subframes, to the base station. The indication is included in a modulation and coding scheme (MCS) field of a physical downlink control channel (PDCCH).
1. A method for transmitting uplink data, the method performed by a machine type communication (MTC) device and comprising:
transmitting initially a bundle of repeated physical uplink shared channels (PUSCHs) including same uplink data to a base station on a plurality of uplink subframes;
receiving a hybrid automatic repeat request (HARQ) response signal from the base station in response to the bundle of repeated PUSCHs;
receiving an indication of a physical downlink shared channel (PDSCH) repetition number from the base station;
determining a repetition number of a PUSCH including the same uplink data based on the indication, when the HARQ response signal is a negative-acknowledgement (NACK); and
retransmitting the bundle of repeated PUSCHs according to the determined repetition number of the PUSCH on the on a plurality of uplink subframes, to the base station,
wherein the indication is included in a modulation and coding scheme (MCS) field of a physical downlink control channel (PDCCH).
2. The method of claim 1 , wherein the determined repetition number of the PUSCH is different from a number of repeated PUSCHs of the bundle which is initially transmitted.
3. The method of claim 1 , wherein the determined repetition number of the PUSCH is less than a number of repeated PUSCHs of the bundle which is initially transmitted.
4. The method of claim 3 , wherein the determined repetition number of the PUSCH is decreased by a half whenever the NACK is received.
5. A method for transmitting downlink data, the method performed by a base station and comprising:
transmitting initially a bundle of repeated physical downlink shared channels (PDSCHs) including same downlink data to a machine type communication (MTC) device on a plurality of downlink subframes;
receiving a hybrid automatic repeat request (HARQ) response signal from the MTC device in response to the bundle of repeated PDSCHs;
determining a repetition number of a PDSCH including the same downlink data, when the HARQ response signal is a negative-acknowledgement (NACK);
transmitting an indication of the determined repetition number of the PDSCH to the MTC device; and
retransmitting the bundle of repeated PDSCHs according to the determined repetition number of the PDSCH on the plurality of downlink subframes, to the MTC device,
wherein the indication is included in a modulation and coding scheme (MCS) field of a physical downlink control channel (PDCCH).
6. The method of claim 5 , wherein the determined repetition number of the PDSCH is different from a number of repeated PDSCHs of the bundle which is initially transmitted.
7. The method of claim 5 , wherein the determined repetition number of the PDSCH is less than a number of repeated PDSCHs of the bundle which is initially transmitted.
8. The method of claim 7 , wherein the determined repetition number of the PDSCH is decreased by a half whenever the NACK is received.
9. A machine type communication (MTC) device, comprising:
a transceiver; and
a processor configured to:
control the transceiver to transmit initially a bundle of repeated physical uplink shared channels (PUSCHs) including same uplink data to a base station on a plurality of uplink subframes, and
control the transceiver to receive an indication of a physical downlink shared channel (PDSCH) repetition number from the base station,
wherein, when the transceiver receives a hybrid automatic repeat request (HARQ) negative-acknowledgement (NACK) from the base station in response to the bundle of repeated PUSCHs, the processor determines a repetition number of a PUSCH including the same uplink data based on the indication,
wherein the transceiver retransmits the bundle of repeated PUSCHs according to the determined repetition number on the plurality of uplink subframes, to the base station, and
wherein the indication is included in a modulation and coding scheme (MCS) field of a physical downlink control channel (PDCCH).
10. A base station for transmitting downlink data to a machine type communication (MTC) device, the base station comprising:
a transceiver; and
a processor configured to:
control the transceiver to transmit initially a bundle of repeated physical downlink shared channels (PDSCHs) including same downlink data to the MTC device on a plurality of downlink subframes, and
wherein, when the transceiver receives a hybrid automatic repeat request (HARQ) negative-acknowledgement (NACK) from the MTC device in response to the bundle of repeated PDSCHs, the processor determines a repetition number of a PDSCH including the same downlink data and controls the transceiver to transmit an indication of the determined reception number of the PDSCH to the MTC device,
wherein the transceiver retransmits the bundle of repeated PDSCHs according to the determined repetition number of the PDSCH on the plurality of downlink subframes, to the MTC device, and
wherein the indication is included in a modulation and coding scheme (MCS) field of a physical downlink control channel (PDCCH).