Method of transmitting and receiving data in wireless communication system and apparatus therefor

A base station transmitting downlink data in a wireless communication system, comprising:

• a radio frequency (RF) module for receiving and transmitting radio signals, and
• a processor functionally connected to the RF module,
• wherein the processor is configured to:
• transmit, to a user equipment, downlink control information, and
• transmit, to the user equipment, downlink data through downlink shared channel based on the downlink control information, and
• wherein, based on the downlink data is broadcasted, a bundling size for the downlink shared channel is based on a pre-defined value,
• wherein, based on the downlink data is not broadcasted, the bundling size is based on a specific number of physical resource blocks or a size of a frequency resource region allocated to the user equipment, and
• wherein a value representing the specific number of physical resource blocks is included in a bundling size set pre-configured for the downlink shared channel.