Throughput Optimization for Non-Linear Energy Harvesting Based Cooperative Device-to-Device Network using Time Switching Scheme

Abstract

Providing an achievable throughput performance with optimal resource allocation in energy constrained device-to-device (D2D) wireless communication via Energy harvesting (EH) scheme with sustainable lifetime extension is of curial concern. However, existing resource allocation methods used to achieve throughput performance is limited due to the impractical characteristic behaviour experienced in conventional EH models and the intractable complex characteristic of the non-linear model. These limitations have hindered the performance of simultaneous wireless information and power transfer (SWIPT) enabled D2D networks in attaining its optimal throughput performances. In this paper, the performance of Time Switching (TS) scheme on D2D relaying network using the piecewise linear EH model for Amplify-and-Forward (AF) protocol was performed. An achievable throughput maximization problem was formulated based on available instantaneous channel state information (CSI) and the solution was derived in terms of optimal TS ratio and allocated power. A resource allocation algorithm was proposed for the management of the derived solution. Simulation results obtained revealed that the developed resource allocation algorithm achieved a better throughput performance than the existing linear and non-linear EH models