Abstract:

For purpose of energy saving in wireless access networks, a regional autonomous energy saving mechanism, consisted of energy saving phase division based on traffic load, was proposed. The method of stepwise choosing closed base stations was adopted when energy saving period begins as well as choosing closed base stations to resume before end of saving period. Improved energy consumption model and evaluation method are also proposed to estimate the efficiency of proposed energy saving mechanism. Simulation using situation similar to existing network was given to verify the proposed energy saving mechanism and reveal that effective energy saving of 17.5% could be achieved, while guaranteeing regional coverage and service quality. It is shown much better in terms of block rate control and user received signal strength than that of the other energy saving mechanisms.

Key words: wireless access network, energy saving mechanism, base station energy consumption