Energy efficient BS Cooperation in DPS CoMP based cellular networks with hybrid power supply

Energy efficient cellular networking has recently drawn increasing attention for reducing network operation cost without sacrificing the quality of service (QoS). This paper proposes a framework for energy cooperation among base stations (BSs) in coordinated multi-point (CoMP) transmission based cellular networks, where the BSs are powered by hybrid power supplies including both the conventional grid and renewable energy sources. The considered network deploys BSs having independent energy storages, which are assumed interconnected by resistive power lines for energy sharing. The network also integrates dynamic point selection (DPS) CoMP technique for selecting the best serving BSs for an user equipment. The objective of the proposed cooperation is to maximize the usage of renewable solar energy leading to reduced on-grid power consumption. The proposed energy cooperation among BSs exploits the tempo-spatial diversities of both the renewable energy generation and the traffic demand. Monte Carlo based simulations are carried out for analyzing the energy efficiency (EE) performance of the proposed network. Simulation results validate the proposed inter-BS cooperation demonstrating substantial energy savings.