Device to Device Communication Underlaying Cellular Network

Abstract

Device to device communication (D2D) refers to a technology that enables the communication between multiple devices or users without having base station. It holds a great promise in improving energy efficiency, throughput and spectral efficiency and thus regarded as a key technology component in LTE-Advanced. Also D2D transmission reduces transmission delay and power consumption taking the advantages of short transmission distance. The objective of this paper is to prove the energy efficiency of D2D communication and to introduce a distance based mode selection procedure. The mode selection mechanism is proposed to limit the number of user equipments (UEs) which carry out D2D communication to obtain maximum spectral efficiency. So first the distance-based D2D mode selection procedure is explained and then simulation results are presented as a proof of explanation. By this mode selection procedure, a suitable mode selection threshold that achieves maximum data rate has been found out. Stochastic geometry is used to analyze the performance of this mode selection mechanism.