Abstract:

In existing energysaving methods for heterogeneous wireless networks, the potential for inter-network collaboration has not been brought into full play, lack of the comprehensive application and theoretical analysis of carrier frequency turn-off technology and base station turn off technology result in unsatisfactory energy-saving effect. In order to solve the problem, this paper proposes a cooperative ESDT(Energy Saving Algorithm Based on Dynamic Thresholds)  in heterogeneous wireless networks. Aiming at minimizing the overall system energy consumption, the algorithm combines carrier frequency turn-off tech nology and base station turn-off technology, and applies queuing theory to adjust thresholds and dynamically turn on/off multi-granularity resources acco rding to system load condition to achieve energy-saving effect. Simulation results show that the proposed algorithm compared to the algorithm dynamically switching the carrier frequency, has better energy-saving effect and higher resource utilization on the premise of the guarantee system performance.

Key words: heterogeneous wireless networks, dynamic thresholds, collaboration energy-saving algorithm