Product Description

Understand how new network technologies impact VoIP!

Voice over Internet Protocol (VoIP) is revolutionizing the way people communicate – both in the corporate world and in personal life. The enormous success of VoIP has led to its adoption in a wide range of networking technologies. Each network technology has its unique features and poses distinct challenges for the performance of VoIP.

VoIP: Wireless, P2P and New Enterprise Voice over IPdescribes the issues arising in the deployment of VoIP in an emerging heterogeneous network environment. Along with a brief overview of the concepts, protocols, algorithms, and equipment involved in realizing VoIP, this book focuses on two areas: quality and performance issues in deploying VoIP over various network settings, and the new mechanisms and protocols in these emerging networks to assist the deployment of VoIP.

VoIP: Wireless, P2P and New Enterprise Voice over IP:

• Discusses the basics of VoIP, VoIP codecs and VoIP Protocols including SIP and H.323.
• Details new technologies such as P2P technology, VoWiFi, WiMax, and 3G Networks.
• Explains the QoS issues arising from deploying VoIP using the new technologies.
• Solves the performance issues that arise when VoIP is deployed over different network technologies.

This book is an invaluable resource for professional network engineers, designers, managers, researchers, decision makers and project managers overseeing VoIP implementations.  Market analysts, consultants, and those studying advanced undergraduate and graduate courses on data, voice and multimedia communications will also find this book insightful. 

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Product Details

Publisher	Wiley
ISBN	0470319569
Format	Hardcover
Author	Samrat Ganguly,Sudeept Bhatnagar
EAN	9780470319567
Label	Wiley
Dewey Decimal Number	004.695
Studio	Wiley
Number Of Pages	276
Title	VoIP: Wireless, P2P and New Enterprise Voice over IP
Publication Date	2008-06-03
Manufacturer	Wiley

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Customer Reviews

Full of errors

Review by Robert Kulagowski, 2010-07-27

If I wasn't forced to use this book at Keller Graduate School for a telecom course, it would have been returned long ago. There are many, many grammatical errors throughout the text which take you out of the "flow" of reading it, if you know what I'm talking about. Then there are the factual errors, which are worse.

Chapter 1:
"
In this case, the adjacent prefixes could merge into single
entry if the corresponding outgoing interfaces for both sets of prefixes is the same. The
exact packet header matching algorithm is called Longest PrefixMatch. If there aremultiple
entries in the routing table that match the destination address of a packet, then the entry
which has the maximum number of prefix bits common with the destination IP address is
considered the valid matching entry and the packet is forwarded accordingly. For example,
for a packet with destination address 133.193.20.24, if there are two entries in the routing
table 133.192.0.0/24 and 133.193.0.0/16 (with corresponding forwarding interface), both
will match with the packet's destination address. However, we will use the entry with the
latter prefix as it hasmore prefix bits in commonwith the destination IP address and forward
the packet to the interface corresponding to that entry.
"

If you know anything about CIDR, you'll see that this is incorrect. 133.193.20.24 will _not_ match 133.192.0.0/24, so saying that it's a potential is wrong.

Chapter 5:
Whoever edited it wasn't paying attention, because how could figure 5.2 survive this long?
(5.2 says that it's a SIP call setup diagram, when in fact it's H.323)

"This chapters describes a small subset of such protocols."
"This chapters"?

"provide an exhaustive treaty on any single"
They mean "treatise" - [...]
A treatise is a formal and systematic written discourse on some subject, generally longer and treating it in greater depth than an essay, and more concerned with investigating or exposing the principles of the subject.

On page 66, in the discussion of gatekeeper, it's fine until this part:

"Like a gateway, a gatekeeper is an optional component in an H.323 system. Without a gateway, there is no bandwidth management functionality in the network. However, if the network does have a gateway, the terminals should become part of its controlled zone.
"

The authors have switched from gatekeeper to gateway! The above paragraph is incorrect; gateways don't have zones. Gatekeepers do. Gateways don't manage bandwidth. Gatekeepers do! This is such a fundamental error that if you're using this book to learn about things like H.323 (and you don't already know what a gatekeeper does) you're in trouble.

Page 78: "Multicast: Several group communication applications such as audio/videoconferencing require that same data to be sent to multiple endpoints. This can be efficiently achieved by using the well-studied IP multicast mechanisms. However, these mechanisms have not been enabled by the ISPs. Thus, group communication
applications are reduced to doing multiple multicasts over the Internet."

Umm, no, group communication applications are reduced to doing multiple _unicasts_ over the Internet.

The last sentence in the paragraph doesn't even support what the previous sentence just said!

More wrongness. Pg 93, table 7.1

The function x^3 mod 10, where x=13 does not result in "3". It's "7".

Pg 92, 7.4. Makes little grammatical sense:
"
Hence, we need a mechanism efficiently to partition all the information among the constituent peer nodes. In order to find some desired information in the network, a user needs to locate a peer who has that information. The search mechanism should ensure that this information-searching process is fast, also.
"

"need a mechanism efficiently to"
"is fast, also".

Also: (pg 95)
"Small spread implies that a cached item be present at only a few nodes despite the presence of an item being ensured in at least one cache in each view."

Um, what?

(and so on, and so on)

There is no errata available from Wiley.

And the only 5-star review here at Amazon is from someone (Chatterjee) who seems to have written a paper with the authors:

pg 188:
Sengupta, S., Chatterjee, M. and Ganguly, S. Improving quality of VoIP streams over WiMax,
IEEE Transactions on Computers (2008).

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Just what I was looking for

Review by Mitch A. Schull, 2008-11-04

There are several books about VoIP in the market but for me this one stands out because of its unique approach. Rather than focusing on protocols and the bit/byte details, the book gave me insight into the concepts and issues arising in deploying VoIP over various technologies. The concepts that drive different technologies like P2P and Wireless networks are explained very clearly. The issues arising when we deploy VoIP in these settings are discussed. I believe the most unique aspect of the book is that it uses performance results reported in recent research publications to highlight the performance issues and their possible solutions. For a relatively short book, it contains a wealth of knowledge about the new technologies and corresponding VoIP related issue. I highly recommend this book to all users who are interested in understanding the core issues and are not merely interested in knowing the positions of different bits and bytes in various messages in protocols.

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Excellent book on VoIP

Review by Mainak Chatterjee, 2008-11-04

As VoIP is becoming one of the most important technologies for voice communications worldwide, it is important for us to know how this technology works and how will it evolve in the years to come. This book provides a comprehensive picture of the evolution, standards, protocols, and system deployment. The book is very timely and would be of much interest among the people working in this area.

The table of content is quite comprehensive and it covers both the theories and the applications of these theories for design and analysis, and deployment of VoIP system. The book is very well organized. The best part I liked about this book is the language and the presentation; it's written in such a lucid form - understanding is so very easy.

The book is technically very sound and covers all the aspects that somebody might want to know about VoIP. There is no topic that I feel has been left out. The book starts with the background and evolution of VoIP networks. A lot of emphasis has been given to the codecs; all standard codes have been discussed and their performance compared. The deployment of VoIP systems is also very well discussed-both for overlay networks and wireless networks. Since, I work on wireless networks; Part III (VoIP in Wireless Networks) was of much interest to me. I must say, the authors have done a fantastic job talking about the state-of-the-art technologies (including WiMax) that support VoIP. I think this book will be particularly useful to graduate students and researchers working in the area of voice/multimedia communication over IP.

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Very shallow and brief treatment.

Review by Johann, 2008-09-04

When you examine the table of contents you might get impressed because it looks so rich. It covers P2P, SIP, H.323, Megaco, IMS, VoWiFi, VoWimax, Codecs, etc. Table of contents is rich but this is a book with less than 280 pages so every major subject has been touched very briefly in layman terms. Normally it would have 900+ pages if all the subjects above in VoIP arena covered in reasonable details. In summary if you are not a technical person/engineer or a technical student and if you need a concise book covering VoIP technologies very briefly in general terms this book might be considerable but it is expensive for the detail level it contained because you can gather the same information easily by browsing in the Internet and from white papers available for free. For technical people in VoIP arena there are many better books available in the market which covers each subject individually.

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