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Energy consumption of wireless access networks is in permanent increase, what results with higher operational expenditures of network operators and negative impact on environment. In this paper we consider possible energy savings of wireless access networks through development of ILP model based on energy efficient network management. To cope with the problem of high computational time characteristic for ILP model, we have developed own heuristic algorithm based on greedy methods and local search. Although heuristics results have been up to 10% higher in comparison to the ones obtained for ILP model, heuristic algorithm ensures minimization of network energy consumption in reasonable amount of time. This makes heuristics algorithms applicable for practical implementation in real network management systems.