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«Abstract. In a sensor network information from multiple nodes must usually be aggregated in order to accomplish a certain task. A natural way to view ...»

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In future work, it might be interesting to view the problem also from a producer’s perspective. In particular, we can try to trade off the producer’s effort to make its information available against the consumer’s effort to obtain that information. The exact tradeoff can depend on the relative frequencies of data collection operations vs. queries, in the style of [13]. Furthermore, even though the main focus of this paper has been the static case where sensor nodes do not move over the lifetime of the network, it might be interesting to extend our approach to allow for efficient routing and information brokerage in the presence of mobile sensor nodes. Also we believe that the use of our distancesensitive range queries can lead to interesting new in-network data-aggregation and processing algorithms.

Acknowledgements The authors would like to thank the anonymous referees for their constructive comments. The authors gratefully acknowledge the support of DoD Multidisciplinary University Research Initiative (MURI) program administered by the Ofce of Naval Research under Grant N00014-00-1-0637, NSF grants FRG-0354543 and CNS-0435111, and the Max Planck Center for Visual Computing. The 2nd author also wishes to thank Scott Shenker for many useful discussions.

References

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