Energy efficiency of 5G mobile networks with base station sleep modes

The paper presents system level simulation results on future base station energy saving using a time-triggered sleep model. The energy efficiency of future base station is compared in macro cellular network against a comparable baseline without usage of sleep modes. Furthermore, results for corresponding 4G case are shown using a restricted set of sleep modes supported by 4G networks. The paper also proposes an analytical method for approximating system level energy saving gains of a base station. The results show rising trend of energy saving gain, when increasing the SS burst period of a 5G base station. However, the gains are seen to saturate at certain SS burst periodicity of 20 msâ€"40 ms. Furthermore, the results illustrate the rising energy saving gains towards reduced system load. The results for 4G show energy saving gains up to 22 % due to reduced set of sleep modes available for use. Finally, the calculated energy saving gain values are closely aligned with the simulated values.