Based on an embodiment of the present disclosure, provided is a method for performing sidelink communication by a first device. The method may comprise: receiving, from a second device, a CSI-RS; transmitting, to a base station, a SR or a BSR, based on triggering of sidelink CSI MAC CE transmission to the second device by channel-related information measured based on the CSI-RS; receiving, from the base station, a sidelink grant related to the SR or the BSR; and canceling the triggered sidelink CSI MAC CE transmission to the second device, based on a latency bound related to the sidelink CSI MAC CE transmission and a time period based on the sidelink grant for the sidelink CSI MAC CE transmission.