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Base stations have been identified to be the most power consuming part in current mobile networks. Since their power profile only depends to a small fraction on the actual traffic load, putting some base stations in sleep mode has been identified as a solution to scale the network's power consumption with the actual load. However, the traditional cellular approach limits the achievable energy efficiency...
This paper introduces a new network architecture for green cellular networks. The basic concept is to separate signaling and data in the wireless access network. Transmitting the signaling information separately maintains coverage even when the whole data network is adapted to the current load situation. Such network-wide adaptation can power-down base stations when no data transmission is needed...
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