Method for canceling a sidelnk buffer status report in a d2d communication system and device therefor

The present invention relates to a wireless communication system. In particular, the invention relates to a method and apparatus for cancellation of the SR triggered by the BSR from the side links D2D communication system. Method comprising: triggering a buffer status report one or more of the side links of the side link data available for transmission (Buffer Status Report, BSR); Further comprising: configuring at least one side link acknowledgment in one or more specific sub-frame period; A first step to determine whether the remaining side links approval can accommodate all pending data available for transmission in the first subframe; And the remaining case the side links approved that can accommodate all pending data available for transmission, comprising the step of canceling all side links BSR triggered, and the remaining side links authorization for a specific time period starting from the first sub-frame the side links are configured to approve the end of one or more sub-frames.