g., [2]) which simply discuss several important
problems, but without attributing them to any application class. In another
related work [49], the authors provide a taxonomy of sensor network models,
but do not discuss any design problems or their relative significance depending
on the application class.
The rest of this chapter is organized as follows. In Section 2, we provide a
classification of WSN applications, and give some examples for each application
class. Section 3 discusses the salient features of, and Section 4 discusses
the possible problems for, all sensor networks. In Section 5, we discuss the relative
significance of each of those problems, depending on the application class.
In Section 6, we discuss some of the currently implemented sensor networks,
and again highlight how the applications a?®ect the significant problems. Finally,
we conclude the chapter in Section 7, and provide some broad future
directions.
6
2 Classification of Sensor Network Applications
In this section, we provide a classification of WSNs based on their application
objectives, tra?±c characteristics and data delivery requirements. Most of the
current WSN applications fall into one of the following broad classes.
2.1 Event Detection and Reporting
Some examples of WSN applications in this class are intruder detection as
a part of military surveillance, detecting anomalous behavior or failures in a
manufacturing process, and detection of forest fires.
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