's Advanced Location-Based Technologies and Services PDF

ISBN-10: 1466518189

ISBN-13: 9781466518186

As a result of the swift elevate within the variety of cellular gadget clients all over the world, location-based companies (LBSs) became pervasive, and the call for for them will keep growing. Exploring fresh alterations within the expertise and its makes use of, complex Location-Based applied sciences and prone takes an in-depth examine new and present applied sciences, recommendations, functions, and possibilities. lower than the editorial counsel of Hassan Karimi, with contributions from specialists within the box, the e-book examines the breadth and intensity of complicated LBS applied sciences and techniques.

The publication presents updated details on LBSs, together with WiFi fingerprinting, geo-crowdsouring, and placement privateness in addition to program parts equivalent to LBSs for public well-being, indoor navigation, pedestrian navigation, and advertisements. Highlights contain discussions of Location-Based Social Networking (LBSN) and the most recent advancements in geospatial clouds and the way they are often used. It takes a glance into the long run with insurance of rising applied sciences that may form the longer term new release of LBSs.

Carefully designed to hide a number themes for readers at assorted degrees and with diverse backgrounds, the booklet presents a stability of information among LBS theories, applied sciences, and functions. The quality of the contributions coupled with the intensity of assurance make the e-book a necessary source for someone exploring the potential for the newest advancements in LBSs.

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The time differences between the signal arrivals from different base stations are used to determine the user’s location with respect to the base stations, provided that the base stations’ coordinates are known and the base stations send time-synchronized signals. For the positioning and timing purposes, the base stations might be equipped with stationary GPS receivers. Thus, the base stations in E-OTD serve as reference points, similar to GPS satellites. However, this method is not subject to limitations in signal availability affecting GPS.

Commercial receivers are available today that can readily track both the GPS and GLONASS signals and make the relevant computations that account for timing offsets and differences in determining the satellite coordinates. These ­receivers are typically used for high-accuracy applications that benefit from the enhanced performance in terms of measurement redundancy and signal availability. 3 GALILEO Galileo is the European civilian Global Navigation Satellite System and is an ongoing initiative coordinated by the European Union and the European Space Agency (ESA).

As of 2000, according to a Federal Communication Commission (FCC) mandate, wireless carriers are to provide the location of all emergency calls. 7 Cellular Network-Based Techniques Supporting LBS: Cost, Latency, and Accuracy LBS Technique Total Costa Latency (TTFF) A-GPS; GPS Moderate E-OTD CGI-TA TOA TDOA AOA RSS Location/multipath pattern matching Hybrid system (A-GPS + CGI) High Low High High Low Low Moderate Moderate <10 s; up to 60 s (cold start) <10 s <10 s <10 s <10 s <10 s <10 s <10 s <10 s a b Accuracyb High (5–10 m) Moderate to high Low; depends on cell size Moderate to high Moderate to high Low to moderate Moderate Moderate High Total cost includes handset, infrastructure, and maintenance; for details, see SnapTrack, 2002, Location Technologies for GSM, GPRS, and WCDMA Networks, Snap Track Whitepaper.

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Advanced Location-Based Technologies and Services


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