IEEE 2010 - - Maximizing the Lifetime of Wireless Sensor Networks with Mobile Sink in Delay-Tolerant Applications

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IEEE 2010 - - Maximizing the Lifetime of Wireless Sensor Networks with Mobile Sink in Delay-Tolerant Applications Powered By Docstoc
					NCCT                                   IEEE PROJECTS 2010-11
Promise for the Best Projects             JAVA & .NET
IEEE TRANSACTIONS ON MOBILE COMPUTING
VOL. 9, NO. 9, SEPTEMBER 2010

         MAXIMIZING THE LIFETIME OF WIRELESS
         SENSOR NETWORKS WITH MOBILE SINK
          IN DELAY-TOLERANT APPLICATIONS

ABSTRACT
This paper proposes a framework to maximize the lifetime of the
wireless sensor networks (WSNs) by using a mobile sink when the
underlying applications tolerate delayed information delivery to the sink.
Within a prescribed delay tolerance level, each node does not need to
send the data immediately as it becomes available. Instead, the node
can store the data temporarily and transmit it when the mobile sink is at
the most favorable location for achieving the longest WSN lifetime.
To find the best solution within the proposed framework, we formulate
optimization problems that maximize the lifetime of the WSN subject to
the delay bound constraints, node energy constraints, and flow
conservation constraints.
We conduct extensive computational experiments on the optimization
problems and find that the lifetime can be increased significantly as
compared to not only the stationary sink model but also more traditional
mobile sink models. We also show that the delay tolerance level does
not affect the maximum lifetime of the WSN.


INDEX TERMS
Wireless sensor network, lifetime maximization, linear programming,
delay-tolerant applications, mobile sink.




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