On the Construction of Radio Environment Map for Underlay Device-to-Device Networks

Device-to-Device (D2D) networks would play a paramount role in meeting the steep operational targets of 5G. D2D networks enable proximity based communication links, allowing the cellular network to scale up substantially with minimal impact on core network resources. Adoption of Radio Environment Map (REM) would help in transcending the performance gains from upper layers to physical layer as well. In this paper, performance evaluation of prevalent REM techniques and sensor deployment strategies has been carried out in Nakagami-m and Nakagami-lognormal channels. The results obtained support adoption of Crowd-Sensing (CS) with Inverse Distance Weighting (IDW) in D2D scenario, especially in public safety applications.