Energy conservation schemes based on mobility modeling in small cell networks

Traditional mobile networks will become dual-layer wireless networks due to small cells deployment. In the next generation of wireless mobile communications, it can be visualized that heterogeneous networks, including macro cells, micro cells and pico cells, are demanded to cooperate user-friendly in a seamless manner. One of the key factors for network cooperation is mobility of users, which causes disproportional distributions of traffic load in time-space domain. In the paper, a new mobility model is raised and analyzed by Markov theory. Furthermore, a novel energy conservation scheme based on the mobility model is proposed. Energy efficiency is improved through the deployment of sleeping strategies among small cells. And an optimized method is given to reduce energy consumption, on condition that users´ demands are satisfied. Finally, the validity of energy saving scheme is verified by simulations. The numerical results show that energy consumption could be reduced about 12%.