Partial Contention-Free D2D Discovery for Proximity-Based Services in Cellular Networks

In this paper, we design a beacon-based Device-to-Device (D2D) neighbor discovery scheme as a key enabler for proximity-based services in the Long-Term Evolution-Advanced (LTE-A) system. The proposed scheme is based on the random access procedure of LTE-A system and it opts for contention-free access to enable the connection of D2D receivers while contention-based strategy is used to connect D2D t...