Improving energy efficiency of femtocell network by joint estimation of downlink throughput and uplink power

With ever increasing number of mobile devices, operators have to search for new alternative to handle user demands. Deployment of additional base stations is always an option to improve coverage of capacity. However, it comes with the cost of increased operational and capital expenditure. Interestingly, it has been seen that nearly 80% of mobile data demands are originating from indoor home and office users. To handle these indoor demands, deployment of small, low power femtocell access points have been suggested. However, in current deployment scenario, most femtocell are underutilized. To improve user association and resource utilization in femtocell, various cell selection schemes have been suggested. However, most cell selection schemes fail to analyze end users power consumption in association criteria. In this paper, we suggest a cell selection scheme to incorporate both uplink power and downlink bitrate to make association decision. Our scheme shows improvement in both capacity and energy efficiency of the network. Obtained results are verified using extensive simulations.