  The information and communication technology, ICT, a domain of the global
economy, consumes more and more energy, what is the effect of continuously
increasing wireless data traffic. Thus, there is a need for more
energy-efficient and sustainable network and resource management, and such a
goal can be achieved by the utilization of renewable energy sources. This paper
proposes a novel user allocation scheme applicable to the heterogeneous radio
access networks supplied with renewable energy sources. Presented results
proved that high-energy efficiency can be accomplished by reallocating some
traffic to the green wireless base station.
