Chatterjea, S. and van Hoesel, L.F.W. and Havinga, P.J.M.
A Framework for a Distributed and Adaptive Query Processing Engine for Wireless Sensor Networks.
Transactions of the Society of Instrument and Control Engineers, E-S-1 (1).
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Official URL: http://srv01.sice.or.jp/~e-trans/papers/E-S-1_09.pdf
Wireless sensor networks (WSNs) are formed of tiny, highly energy-constrained sensor nodes that are equipped
with wireless transceivers and can be used primarily in environmental monitoring applications. The nodes communicate
with one another by autonomously creating ad-hoc multihop networks which are subsequently used to
gather sensor data. WSNs also process the data within the network itself and only forward the result to the
requesting node. This is referred to as in-network data aggregation and results in the substantial reduction of
the amount of data that needs to be transmitted by any single node in the network. We present a framework
for WSNs which would allow optimised query execution plans to be generated in a distributed manner using
only locally available information within the network thus preventing the need to transmit network metadata all
the way to a central server. We also describe how this framework can be used to perform cross-layer optimisations
and illustrate this by presenting a MAC protocol that adapts its operation according to data gathered by
the query processing engine. Query plans also adapt continuously by monitoring varying network conditions to
maintain energy-efficient operation thus maximising network lifetime.
|Research Group:||EWI-CAES: Computer Architecture for Embedded Systems|
|Research Program:||CTIT-UBRICKS: Building Blocks for Ubiquitous Computing and Communication|
|Research Project:||Consensus: Collaborative Sensor Networks|
|Deposited On:||16 January 2007|
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