The potential for location-aware power management

Authors:
R. K. Harle;A. Hopper
Affiliations:
University of Cambridge, UK;University of Cambridge, UK
Venue:
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Year:
2008

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Abstract

This paper explores the use of location-awareness to dynamically optimise the energy consumption of an office. It makes use of high-accuracy location data collected over 60 days randomly selected from a year in a commercial environment to evaluate the potential for energy savings and to motivate techniques that might be used. The results suggest that the energy expended on lighting and fast-response systems could have been cut by 50%; that 75.8% of the average user's working day was spent in their office; and that around 140Wh per PC per day could have been saved, compared to a policy that had machines on for the entirety of the working day. We also find inconsistent office usage that would make optimising slow response systems much harder.