DOCOMO is pursuing the practical utilization of next-generation green base stations that are particularly useful during disasters and friendly to the environment. Compared to conventional base stations that operate on commercial power from electric utilities, these advanced base stations consume reduced amounts of commercial electricity through the use of solar panels, wind-power generation equipment, fuel cells and green power controller technology. They also are equipped with lithium-ion batteries that store electricity for use during disasters and other power outages and spikes in public power demand. DOCOMO is also making progress with its development of a system that renders power distribution to base stations nationwide visible, and research and development of an internal smart grid framework to control the distribution of power among multiple green base stations.