Energy Efficiency Optimization for Relay Deployment in Multi-User LTE-Advanced Networks

Abstract

This paper proposes an energy-efficient position of relay node (RN) for a cooperative single amplify-and-forward relay. The optimum position of RN based on a single carrier-frequency division multiple access of LTE-A network is proposed. The proposed scheme models load balance to maximize energy efficiency (EE) for multiple users. Two categories of users (UEs) are considered; guaranteed bit rate (GBR) and non-guaranteed bit rate. The optimal position of RN is achieved to maximize the average EE for single-relay and total EE by satisfying all UEs. Additionally, the load distribution index in the cell is calculated when multiple RNs are considered. The simulation results have demonstrated that the proposed GBR achieves the objective value in terms of total and average EE by balancing load. Therefore, it is concluded that the optimum position of RN is at 74.5% of the cell radius.