Location-based services (LBS) are a new concept integrating a user’s geographic location with the general notion of services, such as dialing an emergency number from a cell phone or using a navigation system in a car. Incorporating both mobile communication and spatial data, these applications represent a novel challenge both conceptually and technically.
The purpose of this book is to describe, in an accessible fashion, the various concepts underlying mobile location-based services. These range from general application-related ideas to technical aspects. Each chapter starts with a high level of abstraction and drills down to the technical details. Contributors examine each application from all necessary perspectives, namely, requirements, services, data, and scalability. An illustrative example begins early in the book and runs throughout, serving as a reference.
· This book defines the LBS field and identifies its capabilities, challenges, and technologies.
· The contributors are recognized experts from academia and industry.
· Coverage includes navigation systems, middleware, interoperability, standards, and mobile communications.
· A sample application, the "find-friend" application, is used throughout the book to integrate the concepts discussed in each chapter.
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accuracy Active Badge ad-hoc networks algorithm architecture B+ tree base station cell client Computing connection coordinates data model data rates determine developed digital road map distance entities example f-cost Figure frequency friend finder function geocoding geographic geographic coordinates geometry GeoMobility Server geospatial GLONASS GPRS graph IEEE infrastructure integrated interfaces Internet interoperability layer LBS applications linear element linear referencing location information Location Services location-based games location-based services matching middleware mobile communication systems mobile phone mobile terminal mobile user multiple navigation systems nearest neighbor objects OpenLS operators Oracle Spatial packet positioning systems protocols publish/subscribe query R-tree radio representation request reverse geocoding road network route satellite sender service location protocols Spatial Database spatial index specific standards subject spaces subscriber subscription tracking tuple space UMTS updates user’s wireless communication wireless LAN WLAN
Strana 17 - December 1997 concerning the processing of personal data and the protection of privacy in the telecommunications sector, OJ 1998 L 24/1; Directive 2002/58/EC of the European Parliament and of the Council on the processing of personal data and the protection of privacy in the electronic communications sector (Directive on privacy and electronic communications), OJ 2002 L 201/37.
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