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on February 10, 2007
This is an very important book describing a comprehensive coherent vision of a converged network infrastructure (architecture and protocols) for the Next Generation Network (NGN) along with large scale case studies for the AT&T converged network using discrete event simulation, and other dimensioning tools developed by the author and his colleagues over the past two decades at AT&T. The author Dr Gerald Ash has pioneered the implementation of dynamic routing methods within AT&T and WIN over the past two decades and is a leading authority in this area. He has now turned his attention to extending these highly successful techniques to the Next Generation Network (NGN) where all communication and communication services are supported on a converged infrastructure. Dr Ash has been a tireless contributor to a number of standards bodies (ITU-T, ATM Forum and IETF). This direct experience places him in a unique position to assess the challenges of network convergence and indeed he has already removed potential obstacles to his vision of the NGN by participating in the necessary Traffic Engineering extensions to RSVP, LDP etc. This document advances an important class of evolution possibilities, namely for an IP/(G)MPLS/DWDM protocol stack in greater depth and scope than other proposals made to date. It is very timely in that we are now at a crossroads where there are various alternative visions extant indicating how the Internet could or should evolve. The articulation of a comprehensive coherent vision of the NGN and its evaluation is a monumental task and for this Dr Ash deserves commendation. It is made difficult not only because of technical challenges but also because of the divergent cultures humorously represented by the Bellhead/Nethead caricatures.

Dr. Lorne G. Mason,

Professor of Electrical and Computer Engineering

McGill University

Montreal Quebec. Canada
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on November 30, 2006
Jerry Ash draws on his long history at the forefront of research and development in traffic engineering and network planning to provide a comprehensive view of how traffic engineering and network optimization can be applied to provide quality of service in today's networks. Drawing on lessons from the past, he provides a thorough overview and worked examples for modern integrated networks.

This is an important read for anyone serious about studying the topic.
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on January 30, 2007
Jerry Ash is a well known expert in the field and managed to provide a thorough and comprehensive analysis on QoS and Traffic Engineering. The reader will undoubtedly find in this book a large amount of valuable information illustrated by case studies. A recommended reading for anyone interested in QoS & Traffic Engineering.
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on March 17, 2008
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