A communication method of a terminal for saving a battery of a terminal and reducing a signaling overhead when small data are processed is provided. The communication method includes receiving, from a base station, a first message including at least one of first information indicating whether a first signaling optimization is allowed for the terminal, or second information indicating whether a second signaling optimization is allowed for the terminal, transmitting, to the base station, a second message including at least one of third information indicating whether the first signaling optimization is supported by the terminal, or fourth information indicating whether the second signaling optimization is supported by the terminal, and receiving, from the base station, a third message including fifth information indicating a signaling optimization supported for the terminal.