Dynamic base station sleeping scheme for potential super density networks

The concept of super density network (SDN), which is founded by the idea of a very dense deployment of base stations (BSs), offers tremendous potential in terms of satisfying high data rate traffic requirements. On the other hand, the energy consumption of the cellular network, which has become a serious problem, is mostly due to the BSs rather than the mobile terminals. In this paper, we focus on reducing the energy consumption of the SDN by adjusting the BSs´ working mode (active or sleep). Specifically, taking algorithm complexity and user behavior into consideration, we propose a dynamic BS sleeping scheme to dynamically turn some BSs into sleep mode, and a two-stage algorithm is applied to specifically determine which BSs are going to sleep every a fixed time interval aiming to track the traffic variations in time domain. In addition, in our scheme, the active BSs will improve their maximum transmit power to guarantee coverage. Simulation results show that, the active BS pattern well meets the time variation. Moreover, our proposed scheme can reduce the energy consumption effectively while guaranteeing a tolerable blocking probability.