Operation Cost Minimization for Base Stations With Heterogenous Energy Supplies and Sleep-Awake Mode: A Two-Timescale Approach.

In this paper, we study an energy cost minimization problem in cognitive mobile wireless networks, where base stations (BSs) are powered by hybrid energy sources including external power grids (PG), harvested renewable energy (RE), distributed local generators and energy storages. Based on sleep mode techniques, idle BSs can be switched to an energy-saving mode to cut down unnecessary expenditure....