Optimal Energy Exchange Scheme for Energy Efficient Hybrid-Powered Communication Systems

The spread of the wireless communication devices resulted in a remarkable growth of power consumption for telecommunication systems to satisfy the users' demands. Thus, new revolutionary solutions are needed to enhance their energy efficiency. In this paper, we propose an enhanced energy efficiency scheme for wireless systems based on sharing the energy between different cells to optimize the overall cost. The objective is to encourage cooperation between cells/micro-grids to exchange additional/needed power function of their respective throughput demand and energy availability. We propose a pricing scheme for the energy exchange and a power procurement and resource allocation strategy per operator to maximize the revenue of each operator. We derive analytic expressions for power procurement considering uniform power allocation over users. Then, we consider adaptive power allocation per user depending on channels and Quality of Service (QoS) requirements and propose a scheme to derive the global power procurement solution. Our simulation results show the feasibility of the proposed scheme allowing to enhance the energy efficiency of the hybrid powered wireless system while optimizing the revenue of the different involved operators.