Περίληψη:
The paper proposes an algorithm for collecting data front a wireless
sensor network modeled as a random geometric graph in the unit square.
The sensors are supposed to work in art asychronous communication mode
(they store the measures they perform. and transmit a message containing
the data, upon receival of a trigger signal). The model assumes a mobile
sink passing near the sensors, and asking the sensors to transmit their
data. The algorithm defines a route for the sink such that the number of
messages that a sensor needs to transmit be as low as possible.
We also present a kind of “controled” random walk in a (connected)
random. geometric graph that is based upon. the main idea of the sink
routing algorithm, reducing the graph cover time to Theta(n log log n)
instead of Theta(n log n) needed when a simple random walk is performed.
The model can be generalized for the case of more than one mobile sink,
and the algorithm can be modified to deal with locally uniform, density
of sensors deployed in the field.
Συγγραφείς:
Giannakos, Aristotelis
Karagiorgos, Gregory
Stavrakakis, Ioannis
