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امتیاز کاربران

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انتشارات: McGraw-Hill

اثر: Anurag Kumar & D. Manjunath & Joy Kuri

تعداد صفحه: 447

حجم: 2.03MB

جلد کتاب

توضیحات کتاب (خلاصه پیشگفتار):

From the ubiquitous WiFi coffee shop and airport networks to the emerging WiMAX systems, which promise broadband wireless access to mobile users, the menu of wireless access networks promises to become so comprehensive that wired access from user devices may soon become a relic of the past. Today, the variety and scale of wireless networks is unprecedented, and, in teaching courses in our institutions, we have felt the need for a comprehensive analytical treatment of wireless networking, keeping in mind the technical developments in the past, the present, and the future. This book is the outcome of our efforts to address this need.

The foremost aspect of networking, wireline or wireless, is the design of efficient protocols that work. Taking the view that the devil is in the detail, protocols with “working code” often gain widespread acceptance. Although computer simulation is a useful vehicle for understanding the performance of protocols, it is not always sufficient. Further, large simulation models, although possibly closer to reality, take a lot of effort to develop and debug, and are slow to execute, thus rendering them not very useful in the early stages of experimentation with algorithms.

This is where analytical models become very important. First, the process of deriving such models from the standards, or from system descriptions, provides very useful insights. Second, the analytical models can be used to help verify large simulation programs, by providing exact results for subcases of the model being simulated. Third, research in analytical modeling is necessary to develop models that can be programmed into simulators, so as to increase simulation speed. Finally, the analytical approach is very important for the development of new and efficient protocols, and there is a trend toward optimization via reverse engineering of well-accepted protocols.

In addition to the variety of networks and protocols that need to be understood, there is a large body of fundamental results on wireless networks that have been developed over the last fifteen years that give important insights into optimal design and the limits of performance. Examples of such results include distributed power control in CDMA networks, optimal scheduling in wireless networks (with a variety of optimization objectives involving issues such as network stability, performance, revenue, and fairness), transmission range thresholds for connectivity in a wireless mesh network, and the transport capacity of these networks. Further, the imminence of sensor networks has generated a large class of fundamental problems in the areas of stochastic networks and distributed algorithms that are intrinsically important and interesting. This book aims (1) to provide an analytical perspective on the design and analysis of the traditional and emerging wireless networks, and (2) to discuss the nature of, and solution methods to, the fundamental problems in wireless networking.

After the specification of the protocols and the verification of their correctness, we believe that networking is about resource allocation. In wireless networks, the resources are typically spectrum, time, and power. That theme pervades much of this book in our quest for models for performance analysis, for developing design insights, and also for exploring the fundamental limits.

This is a graduate text, though a final year undergraduate course could be supplemented with material from this text. Some understanding of networking concepts is assumed. A quick introduction may also be obtained from Chapter 2 of our earlier book, Communication Networking: An Analytical Approach. Wherever possible, we have used only elementary concepts taught in basic courses in engineering mathematics. A brief overview of most of the advanced mathematical material that we use is provided in the appendix.

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