A novel coding strategy for device-to-device communications

Device-to-device communication is currently an active research topic in the cellular industry. D2D communication enables two mobile users in vicinity to directly communicate over a dynamically assigned, licensed spectrum without going through the base station. D2D offers tremendous benefits such as increase in spectral and energy efficiency, offload traffic of the base station and reduce transmission delay. In this paper, we first present an overview of 3GPP proximity services. Then, we propose a new coding strategy that considerably increases the efficiency of the channel in the multicast setting. Specifically, we study the scenario where three mobile devices are nearby and want to exchange their messages via a relay. Performance evaluation of the proposed scheme using Raptor codes shows that this scheme approaches the theoretical limits at moderate to high signal-to-noise ratio.