Framework for Multi-Operator Collaboration for Green Communication

Network infrastructure sharing has been recently introduced as a promising solution toward energy reduction in cellular networks. In this paper, a framework for the potential power saving inherent in the network sharing approach is provided in multi-operator mobile networks. The overall downlink transmitted power consumption is derived in closed form expression as a function of relative inter-base stations (BSs) distance of cooperative operators. In addition, the optimal inter-BSs distance is deduced to obtain minimum power consumption in multi-operator networks. The proposed model is evaluated and compared with nonroaming scenario in order to provide an apparent vision for saving in power in mobile network operators networks. The proposed model provides a framework to guide the operators whether to roam the user equipment or not.