Method and system for transmitting and receiving data in narrow band wireless communication system

A method for receiving, by a user equipment (UE), a feedback in a narrowband (NB)-Internet of Things (IoT) system, the method comprising:

• receiving, from a base station, a preconfigured uplink (UL) resource (PUR) configuration via radio resource control (RRC) signaling;
• while in an idle mode, transmitting, to the base station, uplink data on the PUR ending in subframe n;
• and
• receiving, from the base station, Control Information (DCI) related to a feedback for the uplink data through a narrowband physical downlink control channel (NPDCCH) in a feedback window whose a starting subframe is a Downlink (DL) subframe after 4 DL subframes from the subframe n, such that monitoring of the UE for the feedback window is stopped after the transmission of the DCI,
• wherein a first state of a specific field included in the DCI is related to the feedback, and a second state of the specific field is related to a fallback indication for the UE.

A base station transmitting a feedback in a narrowband (NB)-Internet of Things (IoT) system, the base station comprising:

• a radio frequency (RF) module configured to transmit and receive a radio signal;
• and
• a processor functionally connected to the RF module,
• wherein the processor is configured to:
• transmit, to a user equipment (UE) a preconfigured uplink (UL) resource (PUR) configuration via radio resource control (RRC) signaling;
• receive, from the UE in an idle mode, uplink data on the PUR ending in subframe n;
• and
• transmit, to the UE, Downlink Control Information (DCI) related to a feedback for the uplink data through a narrowband physical downlink control channel (NPDCCH) in a feedback window whose a starting subframe is a Downlink (DL) subframe after 4 DL subframes from the subframe n, such that monitoring of the UE for the feedback window is stopped after the transmission of the DCI,
• wherein a first state of a specific field included in the DCI is related to the feedback, and a second state of the specific field is related to a fallback indication for the UE.

A user equipment (UE) receiving a feedback in a narrowband (NB)-Internet of Things (IoT) system, the UE comprising:

• a radio frequency (RF) module configured to transmit and receive a radio signal;
• and
• a processor functionally connected to the RF module,
• wherein the processor is configured to:
• receive, from a base station, a preconfigured uplink (UL) resource (PUR) configuration via radio resource control (RRC) signaling;
• while in an idle mode, transmit, to the base station, uplink data on the PUR ending in subframe n;
• and
• receive, from the base station, Downlink Control Information (DCI) related to a feedback for the uplink data through a narrowband physical downlink control channel (NPDCCH) in a feedback window whose a starting subframe is a Downlink (DL) subframe after 4 DL subframes from the subframe n, such that monitoring of the UE for the feedback window is stopped after the transmission of the DCI,
• wherein a first state of a specific field included in the DCI is related to the feedback, and a second state of the specific field is related to a fallback indication for the UE.