In the hit CBS crime show Person of Interest, which debuted in 2011,
the two heroes—one a former Central Intelligence Agency agent and
the other a billionaire technology genius—work together using the
ubiquitous surveillance system in New York City to try to stop violent
crime. It’s referred to by some as a science fiction cop show. But the
use of advanced technology for crime analysis in almost every major
police department in the United States may surpass what’s depicted
on TV crime dramas such as Person of Interest. Real-time crime cen-
ters (RTCCs) are a vital aspect of intelligent policing. Crime analysis
is no longer the stuff of science fiction. It’s real.
The concept of “smart city” is often used implying that the reader has a clear and
common notion of what it means. However, in the current literature it is very hard
to find a precise definition. what is even more interesting, it is not so easy to find a
precise definition of what a city is.
Duringthe past years, there has been a quickly rising interest in radio access technologies for providing
mobile as well as nomadic and fixed services for voice, video, and data. This proves that the difference
in design, implementation, and use between telecom and datacom technologies is also becoming more
blurred. what used to be a mobile phone used for voice communication is today increasingly
becoming the main data communication device for end-users, providing web browsing, social
networking, and many other services.
A decade ago, I first wrote that people moved, and networks needed to adapt to the
reality that people worked on the go. Of course, in those days, wireless LANs came
with a trade-off. Yes, you could use them while moving, but you had to trade a great
deal of throughput to get the mobility. Although it was possible to get bits anywhere,
even while in motion, those bits came slower. As one of the network engineers I worked
with put it, “We’ve installed switched gigabit Ethernet everywhere on campus, so I
don’t understand why you’d want to go back to what is a 25-megabit hub.” He un-
derestimated the allure of working on the go.
The genesis for this book was my involvement with the development of the
SystemView (now SystemVue) simulation program at Elanix, Inc. Over several
years of development, technical support, and seminars, several issues kept recur-
ring. One common question was, “How do you simulate (such and such)?” The sec-
ond set of issues was based on modern communication systems, and why particular
developers did what they did. This book is an attempt to gather these issues into a
single comprehensive source.
Wireless Fidelity (Wi-Fi) networks have become mainstream over the last few years. what
started out as cable replacement for static desktops in indoor networks has been extended
to fully mobile broadband applications involving moving vehicles, high-speed trains, and
even airplanes.
Wirelessmeshnetworkingisahotandgrowingtopic,stillinitsinfancyin
some ways, whilst already shown to be capable in others. From a military
beginning, mesh networks moved to civilian use and are now being
deployed worldwide as both local area networks (LANs) and metro-
politan area networks (MANs). However, these deployments are still
‘leading edge’ and it is not yet clear what the most enduring applications
of mesh will be – particularly as the market moves from early adopters
towards widespread take up.
During the past two decades there has been a substantial growth in research in
wireless communications. The number of journals published from various parts of
the world catering to the research community has grown exponentially. Despite
such a growth, the engineering community still needs more information so as to
thoroughly comprehend wireless channel characteristics. what specifically must be
understood are the effects of channel degradation brought on by statistical fluctua-
tions in the channel.
The genesis for this book was my involvement with the development of the
SystemView (now SystemVue) simulation program at Elanix, Inc. Over several
years of development, technical support, and seminars, several issues kept recur-
ring. One common question was, “How do you simulate (such and such)?” The sec-
ond set of issues was based on modern communication systems, and why particular
developers did what they did. This book is an attempt to gather these issues into a
single comprehensive source.
