Changeset 2754
- Timestamp:
- 10/30/09 03:14:01 (4 weeks ago)
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- 1 modified
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HydroWatch/Tim/doc/ipsn10/sec_conc.tex (modified) (1 diff)
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HydroWatch/Tim/doc/ipsn10/sec_conc.tex
r2747 r2754 1 1 %%%%%%%%%%%%%% 2 2 \section{Conclusions and Future Work} 3 We have presented 3 We have presented a framework for changing the way we believe environmental wireless sensor networks should be utilized for long-term deployments. Building on previous work in this area, we argue that the ``always on'' approach to environmental sensing places an inherent bias towards network responsiveness being the key performance metric. By turning \emph{off} the radio for long periods, we believe we can achieve a much greater network utility by redirecting energy away from idle listening towards increasing data fidelity at the same time as maintaining a reasonable level of network responsiveness. 4 4 5 Given this model of thinking we propose a means by which nodes can adapt and optimize their operating point in order to maximize network utility given some prediction of future energy resources. As such we are advocating moving away from the ``slow and steady'' approach to long-term sensing where a node adopts a fixed operating point and attempts to consume as little energy as possible. Given we have the ability to estimate future energy resources, we believe nodes should consume as \emph{much} energy as possible in order to fully utilize all available harvested energy and maximize both the data fidelity and network responsiveness. Using retrospective environmental data we have shown our system performs over extended periods in being able to sustain long-term operation whilst maximizing network utility given energy constraints. Finally we compare our approach with other proposed methods for adapting node operating point, and show that we are able to achieve greater levels of network utility. 5 6 6 What is the impact of moving to this model of thinking? Can this take environmental sampling to the next level? 7 8 - Long-term field trials. 9 - Feed back into the title 10 7 Moving forward we intend to further demonstrate the benefit of our proposed approach via long-term field trials.
