IP Location

Martin Dawson

James Winterbottom

Martin Thomson

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All rights reserved. Printed in the United States of America. Except as permitted under the Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher, with the exception that the program listings may be entered, stored, and executed in a computer system, but they may not be reproduced for publication.

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ISBN-13: 978-0-07-226377-0

ISBN-10:

0-07-226377-6

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Martin Dawson-To the Lyons-Dawson gang: Kate, Andrew, and Elena.

James Winterbottom-To my wife, Loraine; my children, Vanessa, Michael, and Emma; and to my parents, David and Elizabeth.

Martin Thomson-To Jamie, with thanks for the unquestioning support.

About the Authors

Martin Dawson (BEng-elec, MEngSc) is the chief product architect of the Andrew Geometrix Mobile Location Center development team based in Wollongong, Australia. Martin Dawson's engineering career has spanned 29 years, from work in real-time embedded microprocessor control systems (the early days of local area network deployments) to paying his dues in a university network admin role. The past 19 years have been spent in networking and telecommunications. This includes a period of time with British Telecom Research Laboratories in the UK developing Service Creation Environments for Intelligent Networks (IN), and with Telstra, where he also developed IN services. Prior to joining Andrew Corporation, he worked for Nortel for 11 years developing a wide range of solutions with a focus on wireless IN services and the development of cellular location systems for emergency and commercial services.

He is currently active in forums for cellular and IP location technologies, and acts as consultant to industry, government, regulatory authorities, and emergency agencies. He is a member of the North American National Emergency Number Association (NENA) and has contributed to the working group focused on the development of solutions for VoIP emergency services.

James Winterbottom has over 20 years of experience in the Telecom industry and is currently a Senior Product Architect with Andrew Corporation's Geometrix Mobile Location Center. In recent years, James has worked in the cellular location industry, but throughout his career he has developed an expertise in CDMA provisioning and management systems, as well as intelligent network services. Currently, James is active in standards forums for IP location technologies, and acts as a consultant to industry, government, and regulatory authorities. He is a member of the North American National Emergency Number Association (NENA) and is active in NENA working groups concerned with determining and using location to support VoIP emergency services. He is also an active participant in the IETF, developing solutions to address the problems of determining, acquiring, and conveying location in IP networks. James is the official liaison from the ESIF Next Generation Emergency Services (NGES) working group to the IETF Geopriv and ECRIT working groups.

Martin Thomson is an engineer with Andrew Corporation. He has spent five years developing cellular wireless products for Nortel and Andrew Corporation, in particular the Mobile Location Center (MLC). Since 2004, Martin has been working in research for IP location and has produced a number of specifications, including several IETF Internet drafts. Martin has also been involved in the development of prototype systems for location in IP networks.

About the Technical Editor

Greg Burdett has 18 years of telecom experience and has worked in numerous senior management leadership positions for telecom companies. Greg also has multiple patents in the field of telecommunications (two awarded; two pending). Since 2001, he has focused his energy in the area of location, for both the cellular as well as IP location contexts. He was the Business Lead for the Mobile Location Center (MLC) business at Nortel until 2005, and led the activity to divest the MLC business to Andrew Corporation, which completed in August 2005. In October 2005, Greg launched his own consulting company, Jagged Networks (www.Jaggednetworks.com), where he provides consulting/advisory services to broadband service providers and location solution vendors in order to assist them with their VoIP 911/IP location product strategies.

Acknowledgments

Martin Dawson

Firstly, I have to thank my co-authors; they never cease to amaze me with their output, ingenuity, skills, and downright cleverness. Most of all, to my beloved Rosemontatorium crew: Thank you for your forbearance and support despite my apparent state of perpetual distraction.

James Winterbottom

I would like to thank my co-authors, the two Martins, for the effort they have put into making sure that this book covers all its topics as thoroughly as possible. Thanks also to Hannes Tschofenig for pointing me toward various specifications that I may have otherwise missed.

Martin Thomson

I would like to thank my co-authors for the opportunities I have been given while working with them. There are also a number of people at the IETF who have vigorously opposed some of the concepts that are documented in this book, which has ultimately forced me to refine my thinking, and for which I am grateful.

And from All of Us

Thanks to the team at Andrew Network Solutions in Wollongong, Australia and Ashburn, VA, U.S.A. for giving us the latitude to focus beyond the world of cellular location. Thanks also to the many wonderful people and personalities in the industry who contributed to bringing the ideas in this book to life, including Barbara Stark, Nadine Abbott, Anand Akundi, Tom Breen, Brian Rosen, Patti McCalmont, Greg Burdett, Guy Caron, Ed Shrum, Tom Anschutz, Perry Prozeniuk, Carl Reed, and Bill Barnes. Our apologies to those many others that we have neglected to mention.