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Fundamentals of Mobile and Pervasive Computing by Loren Schwiebert, Golden Richard III, Sandeep Gupta, Frank Adelstein

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Chapter 17Security in Wide Area Networks

Wireless wide area networks (WWANs) are very large-scale wireless networks. 802.16 provided coverage in a metropolitan area, say, 10 miles, to a fixed location. A WWAN must provide continuous coverage across a much larger area, such as an entire state or country. And nodes in a WWAN can move and must remain connected. Currently, the only technology that provides this type of coverage is satellite and cell phones. Although satellite technology provides truly global coverage, the current cost makes it impractical for common use. Cell phone technology, on the other hand, is practically ubiquitous and much more affordable. Therefore, we focus on cell-based WWANs in this chapter.

17.1 Basic Idea

Low-power cells ...

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