Aspects presented herein may improve the resource allocation of sidelink communications and reduce power consumption for sidelink devices. In one aspect, a first wireless device selects a resource for a discovery message from a sidelink resource pool that is partitioned into a first portion and a second portion. The first wireless device transmits a discovery message to a second wireless device using the resource selected from the first portion of the sidelink resource pool. The first wireless device monitor for a discovery response message from the second wireless device in the sidelink resource pool.