Include Index

Preface
कर्मणो यपि बोद्धव्यं बोद्धव्यं च विकर्मणः ।
अकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः ॥१७॥
karmano hy api boddhavyam boddhavyam ca vikarmanah
akarmanas ca boddhavyam gahana karmano gatih
The intricacies of action are very hard to understand. Therefore one should know
properly what action is, what forbidden action is, and what inaction is.
The Bhagvad Gita (4.17)
This book is the outcome of the research contribution of Hanane Fathi towards
her Ph.D. studies jointly with Shyam S. Chakraborty and Ramjee Prasad as su-
pervisors. To the best of the authors' knowledge, this is a first book on voice
over Internet protocol (VoIP) covering such a broad perspective as illustrated in
Figure P.1.
This book is a new, forward-looking resource that explores the present and
future trends of VoIP in the wireless heterogeneous networks. This book also
provides the discovery path that these network infrastructures are following from
a perspective of synergies with the present systems and how they will pave the
way for future systems.
This book is intended for everyone in the field of wireless information and
multimedia communications. It provides different levels of material suitable for
managers, researchers, network providers, and graduate students. We hope that
all readers will experience the benefits and power of this knowledge.
We have tried our best to make each chapter comprehensive and we cannot
claim that this book is without errors. Any remarks to improve the text and correct
the errors would be highly appreciated.