Networked and Embedded Systems Laboratory

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With the growing interest in wireless sensor networks, techniques
for their systematic analysis design and optimization are essential.
Despite numerous research efforts in optimizing hardware,
algorithms and protocols for these networks, it remains largely
unexplored how these innovations can be all tied together to
design a sensor network for a specific practical application. We
propose a methodology that starts from four independent quality
of service (QoS) parameters and allows the user to completely and
unambiguously describe the desired performance, without having
to deal with the details of individual devices or protocols. By
making appropriate choices in terms of device capabilities and
run-time techniques, a design can be positioned in this fourdimensional
QoS space. Furthermore, we describe a technique to
explore the associated tradeoffs at design time, using both
analytical expressions and simulations. To illustrate the benefits
of our approach, a design example is worked out, which shows a
five fold improvement in network operational lifetime by adapting
the event reporting delay.

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