Vehicular safety critical communications: a case study for unsupervised LTE D2D

This research report explores the recent 3GPP LTE D2D rel. 14 Radio Resource Management specification to identify the challenges and evaluate the potentials of Unsupervised LTE D2D (mode 2) for Safety-critical V2X Communications. It also proposes two distributed resource allocation strategies for unlicensed band access. Complementary to DSRC/ITS-G5, Unsupervised LTE D2D is an opportunity to provide redundancy for ultra-reliable systems, such as safety-critical V2X communications.