The Definitive Guide to:
Mobile Positioning with GPS, Terrestrial Positioning, Non-cellular (RFID and WiFi) Positioning

Published: June 2005
141 Pages (PDF format)
Authors: David H. Williams and Gerry Christensen

Single-user license $ 95.00 US Secure Server

Company-wide license $ 995.00 US Secure Server

		No attribute is more distinguishing and valuable to mobile network operators and their constituents (customers, suppliers, and investors) than customer location information. Location-based Services (LBS) are predicted to finally take off beginning in late 2005 to early 2006. Many people do not understand the underlying technologies necessary to position wireless devices. This publication provides the reader with an easy to understand, step-by-step approach to location determination - crucial knowledge for exploiting location as a value-added service enabler for mobile communications. Features and Benefits This publication will answer your most important questions including: What are the primary positioning technologies for cellular communications and how do they work? What are the advantages and disadvantages of various positioning methods for various types of location-based services (LBS)? Target Audience for this Publication Entrepreneurs and investors in the LBS applications and services industry Infrastructure and service providers in the positioning and location management sector Wireless carriers and location-based services providers Engineers, planners, product managers, and business development personnel Note: This publication will be especially useful for those people only interested in positioning technologies and procedures.  For those people also interested in GIS and location management, we recommend the full Mobile Positioning and Location Management publication.
		Table of Contents Introduction Overall Purpose Why Is Mobile Positioning Important? Mobile Positioning Technologies Introduction to Positioning Location Determination Methods (Non-Telephony) Landmarks Dead Reckoning Celestial Navigation Magnetic Tracking Location Determination Methods for Mobile Applications Location Positioning Determination Technologies Satellite-Types Overview Geostationary Satellites Medium Earth Orbits Low Earth Orbit Satellites Elliptical Orbit Satellites The Global Positioning System Overview GPS Coverage GPS Calculations Satellite Position Determination GPS Device Distance From A Satellite Calculation GPS Device Location Calculation GPS Error Sources Selective Availability Tropospheric Delays Ionosphere Delays Multi-Path Delays GDOP/Visibility Delay GPS Calculation Refinement Pseudo-Ranges Differential Correction WAAS Other Considerations Alternatives to GPS Time To First Fix Cold Start Autonomous Start Warm Star Hot Start Obscuration GPS Technical Data Assisted GPS A-GPS Historical Background How A-GPS Works GPS-Based Mobile Applications Overview Critical Success Factors Business Case Development Terrestrial Network-Based Location Technologies Overview GSM History of GSM Architecture Mobile Station Base Station Subsystem BTS BSC LMU Network and Switching Subsystem MSC HLR VLR EIR SMLC GMLC Operations and Support Subsystem GSM Location Management (Cell Handover for LBS) GSM Basic Location Management Cell ID Cell and Sector Timing Advance Time Difference of Arrival (TDOA) and Angle of Arrival (AOA) What Happened to Enhanced Observed Time Difference (E-OTD) E-OTD versus TDOA Comparing Handset-Based and Network-Based Location Strategies RFID RFID Overview RFID Applications RFID Dimensions The Strategic Implications of Wal-Mart's RFID Mandate Wi-Fi Wi-Fi/802.11 Overview FHSS DSSS Specifications Overview 801.11 802.11a 802.11b 802.11g Wi-Fi Location Technology Received Signal Strength (RSSI) Pattern Matching Wireless Grid Wi-Fi Location-Enabled Applications

David H. Williams David Hilliard Williams is an internationally-known expert in the wireless/mobile communications field.  His particular specialty is in Wireless Location, including Wireless 911 (E911), Location-Based Services, Radio Frequency Identification (RFID), and location-related Wireless Fidelity (Wi-Fi).  He has developed industry-leading business and technology strategies and implementation approaches in these areas and provides consulting services to some of the leading enterprises in the U.S., South America, and Europe.  Mr. Williams is a member of the Association of Public Safety Communications Officers (APCO) and the National Emergency Number Association (NENA). Mr. Williams has over 16 years of consulting experience working at the most senior executive levels.  Prior to founding E911-LBS Consulting, Mr. Williams was an Associate Partner with Accenture, the world's largest technology consulting firm, and served as Practice Director for inCode Wireless.  He has also worked for Booz, Allen, & Hamilton and Deloitte Consulting.  He started his career as an electrical engineer for Hughes Electronics. Mr. Williams has an MBA in Information Systems Management from The University of Texas at Austin, and a Bachelor of Science in Electrical Engineering from Purdue University.    He is married with four children, and resides in Wilton, Connecticut.  David is available to answer questions and offer related consulting and training as well as independent and customized research. David@MindCommerce.com

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