Expediting D2D discovery by using temporary discovery resource

Recently, Device-to-Device (D2D) communication has been under discussion with great attention. In particular, D2D discovery, as the first step of D2D communication, is a matter in dispute. In this paper, we propose a novel D2D discovery protocol to significantly reduce the participation delay, i.e., the time duration from the user's entrance into the network to the first beacon transmission, compared with the existing protocols incurring long participation delay. For the verification of our work, we evaluate our work via both mathematical analysis and simulation. Through our thorough investigation with a few resource selection algorithms, we observe that our proposed scheme reduces participation delay by 66% and that it barely degrades the performance in guaranteed distance among users which share the same resource.