Method for transmitting or receiving signal in wireless communication system and device therefor

A user equipment (UE) for transmitting an uplink signal in a wireless communication system, the UE comprising:

• a processor configured to determine a data transmission mode;
• and
• a transmitter configured to transmit, to a base station, a control channel carrying control information including the data transmission mode, a data channel carrying at least one transport block (TB), and a preamble in a contention resource region under control of the processor,
• wherein the preamble indicates a location of a resource to which the control channel is mapped within the contention resource region, and
• wherein the data transmission mode determined by the UE corresponds to either a first transmission mode where one TB is divided into N sub-blocks and then transmitted or a second transmission mode where the one TB is repeatedly transmitted M times.

A method of receiving an uplink signal by a base station in a wireless communication system, the method comprising:

• detecting a preamble;
• receiving a control channel transmitted by a user equipment (UE) on a resource in a control resource region, wherein the resource is indicated by the preamble;
• and
• receiving a data channel carrying at least one transport block (TB) based on control information carried by the control channel,
• wherein the control information indicates a data transmission mode applied to the data channel carrying the at least one TB, and
• wherein the data transmission mode corresponds to either a first transmission mode where one TB is divided into N sub-blocks and then transmitted or a second transmission mode where the one TB is repeatedly transmitted M times.

A base station for receiving an uplink signal in a wireless communication system, the base station comprising:

• a processor;
• and
• a receiver configured to detect a preamble, receive a control channel transmitted by a user equipment (UE) on a resource in a control resource region, wherein the resource is indicated by the preamble, and receive a data channel carrying at least one transport block (TB) based on control information carried by the control channel under control of the processor,
• wherein the control information indicates a data transmission mode applied to the data channel carrying the at least one TB, and
• wherein the data transmission mode corresponds to either a first transmission mode where one TB is divided into N sub-blocks and then transmitted or a second transmission mode where the one TB is repeatedly transmitted M times.