WLAN becomes a necessary facility for flexible Internet pro- visioning in enterprise networks. Usually this connection provisioning is designed to handle a peak load with high den- sity of Access Points (APs) to guarantee a desired level of quality of service (QoS). This design approach however leads to energy inefficiency due to the daily demand variability. In fact the off-peak period of the daily behavior is usually quite long and hence some resources consume power without any beneficiary activity. Resource-on-demand (RoD) provision- ing is among foreseeable solutions that satisfy both energy efficiency as well as QoS constraints. That is the network capacity is dynamically dimensioned to demand while extra resource goes to low energy consumption mode to save en- ergy. In dense WLAN scenarios, extra APs are turned off during low load until required due to increase in demand. Some theoretical analysis of RoD has been proposed by related works, but experiments on real production networks are still needed in order to investigate the practical issues related to RoD strategies. This paper addresses some of these issues through an experimental activity performed on RoD strategies. Two strategies, namely association-based and traffic-based policies, are implemented in one part of Po- litecnico di Torino Campus WLAN. Results from our testbed show that RoD strategies are effective and energy saving up to 70% is possible.
|Titolo:||Experimenting Resource-on-Demand Strategies for Green WLANs|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||10.1145/2695533.2695557|
|Appare nelle tipologie:||1.1 Articolo in rivista|