Multichannel allocation for full‐duplex underlay device‐to‐device communication

Abstract

AbstractDevice‐to‐device (D2D) communication is a promising future wireless network technology that establishes a direct link between the devices in close vicinity. Along with the improved end‐to‐end latency and network rate, it also enhances the spectral and power efficiency. Most of the previous works on interference management and resource allocation have considered half‐duplex (HD) D2D systems and have assumed that D2D pairs cannot access more than a single channel at a time and a cellular channel is assigned to at most one D2D pair. In this article, we investigate multiple‐pair‐multiple‐channel (MPMC) allocation scenario over multiple‐input‐multiple‐output‐based full‐duplex D2D networks. The idea is to maximize the aggregate sum data rate of the D2D network by optimal allocation of the resources and maintaining a desired threshold rate for the cellular users. The cross‐tier interferences are intelligently handled by appropriate channel allocation and the co‐tier interferences by proper power allocation. The efficacy of the proposed MPMC algorithm has been evaluated through rigorous simulations, and an appreciably better network rate has been found as compared with the single‐pair‐single‐channel‐based allocation. Moreover, by allowing more users to communicate in tandem, with enhanced average rate, the results also ensure a better opportunity of higher utilization of the scarce licensed cellular spectrum. The presented algorithm has also been compared with random and uniform based allocations and further analyzed in HD‐MPMC communications.