CPC Class H04W

In one embodiment, a method for performing an operation for a first terminal in a wireless communication system comprises the steps of: determining that a physical layer problem has occurred during communication with a base station; starting a recovery timer for the physical layer problem; and transmitting, to a second terminal, sidelink data by using a sidelink resource, wherein the first terminal determines whether to perform switching from resource allocation mode 1 to resource allocation mode 2 in consideration of the latency budget of the sidelink data and the expiration time of the recovery timer.