Hysteretic Base Station Sleeping Control for Energy Saving in 5G Cellular Network

Base station (BS) sleeping operation in transient process has been widely analyzed in current studies to save cellular network energy consumption. In this paper, we propose a hysteretic BS sleeping strategy in 5G cellular network. The BS adjusts its transmitting power to adapt to the traffic load in active state, and frequently goes to sleep state and keeps sleeping until N requests assembled. When the BS wakes up or shuts off, it will experience a state transition delay, which means the BS actions somehow lag behind the BS decisions. This paper explored the impact of state transition delay on the power consumption and traffic delay performance, and discussed the tradeoff between power-saving and traffic delay requirements. Numerical results show that the longer transition delay is, the worse system performance the BS is suffered. And the BS sleeping operation is energy-efficient only under a short transition delay.