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The explosive development of ICT (Information and Communication Technology) industry has emerged as one of the major sources of world energy consumption. Therefore, this paper concerns about the BS (Base Station) energy saving issue, for most energy consumption of the communication network comes from the BSs and the core network. Particularly, the authors consider dynamically turning off certain BSs when the network traffic is low. Centralized and decentralized implementations are investigated. Simulations demonstrate the energy efficiency of the proposed algorithms and the trade-off between energy saving and coverage guarantee.
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