期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2014
卷号：2014
DOI：10.1155/2014/250236
出版社：Hindawi Publishing Corporation
摘要：Recently, energy harvesting has been emerging as a
promising technique to prolong the lifetime for wireless sensor
nodes. Most existing efforts address the design of energy harvesting
and sensor node subsystem separately or ignore some
real-world constraints. In this paper, we study how to codesign
the two subsystems and how to jointly manage energy harvesting,
storage, and usage. We first propose a novel system architecture
for energy harvesting which employs several supercapacitors
to eliminate the conflicts on charging and discharging among
different system components. Then, we present a method to
schedule their charging and discharging, which is proved to be
able to guarantee zero waste of the harvested energy if the battery
is not full. Third, we propose an optimal algorithm to minimize
different components’ capacity and two heuristic algorithms to
maximize the system reward. We conduct extensive experiments
based on real-life data traces. Results show that the proposed
system architecture can harvest more energy compared to the
state of the art, and the capacity optimization algorithm can
choose the most suitable size for each system component.
