Abstract
In this study, a power consumption model as a function of the traffic is developed for macrocell base stations based on measurements on an actual base station. This model allows us to develop energy-efficient wireless access networks by combining the Green radio access network design (GRAND) tool designed by the authors, which develops an always-on network with a minimal power consumption for a predefined area, and an algorithm that introduces power reducing techniques in the network such as sleep modes and cell zooming. Green-field deployments and optimization of existing networks are investigated. For a green-field deployment, it was found that introducing sleep modes and cell zooming in the network can reduce the power consumption by up to 14.4% compared to the network without sleep modes and cell zooming. Optimizing existing networks by applying GRAND (without sleep modes and cell zooming) results in a power consumption reduction of 34.5% compared to the original network. A careful selection of base station locations already results in a significant energy saving. Introducing sleep modes and cell zooming to the current networks results in a saving of 8%. Sleep modes and cell zooming are promising energy-saving techniques for future wireless networks.
Highlights
Several studies indicate that within telecommunication networks, the wireless access networks are high power consumers [1,2,3]
In this study, a power consumption model as a function of the traffic load and temporal variations is developed for a macrocell base station based on measurements on an actual base station
By introducing sleep modes and cell zooming in this network, the power consumption can be reduced up to 14.4% compared to the network without sleep modes and cell zooming
Summary
Several studies indicate that within telecommunication networks, the wireless access networks are high power consumers [1,2,3]. The base stations (BSs) are responsible for a significant part of the power consumption caused by wireless access networks. A lot of effort has been put lately in designing new power reducing techniques such as sleep modes and cell zooming [4-12]. Sleep modes allow that a (part of the) BS can be switched off when there is no or little activity taking part in its coverage cell. The cell size is adjusted adaptively according to the level of activity in a BS’s cell. These techniques on their own can significantly reduce the power consumption in wireless access networks and combining them allows even higher power savings.
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