Integrated Mode Selection and Bandwidth Allocation Scheme for Interference Mitigation in D2D Networks

Abstract

As the steep growth in mobile data traffic continues to gain lots of attention in recent years, discussions of the next generation of mobile networks - the fifth generation (5G), have gained significant traction both in the academia and industry. In addition to more capacity, stringent requirements for improving energy efficiency, decreasing delays, and increasing reliability have been envisioned in 5G. Many solutions have been put forward, one of them being Device-to-Device (D2D) communications where users in proximity can communicate directly with one another. Interference management between Cellular User Equipment (CUE) and D2D user Equipment (DUE) is one of the most critical issues when D2D is introduced to cellular network because D2D users share the same licensed spectrum with cellular users. This work considers an overlaying network scenario where a Mode Selection and Bandwidth Allocation Scheme (MS-BAS) is developed to mitigate cross-tier interference, while delivering an average data rate of more than 50 Mbps across the network, indicating an over 12% improvement when compared with the existing Selective Overlay Mode Operation (SOMO). The results obtained show the efficacy of the algorithm in significantly mitigating cross tier interference in the network.