An operation method related to sidelink of a second user equipment (UE) in a wireless communication system includes transmitting, by the second UE, assistance information including a plurality of first discontinuous reception (DRX) configuration related information to a first UE, wherein the plurality of first DRX configuration related information is transmitted to a base station (BS) by the first UE, and receiving, by the second UE, one or more second DRX configuration related information transmitted by the BS. The second DRX configuration related information is determined based on the assistance information including the plurality of first DRX configuration related information.