Location-based services fundamentals and operation
Location-based Services (LBSs) are mobile services for providing information that has been created, compiled, selected or filtered under consideration of the users' current locations or those of other persons or mobile devices. Typical examples are restaurant finders, buddy trackers, navigation...
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| Format: | eBook |
| Language: | Inglés |
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Chichester, England ; Hoboken, NJ :
John Wiley
c2005.
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| Edition: | 1st edition |
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| See on Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009627015706719 |
Table of Contents:
- Location-based Services; Contents; Preface; List of Abbreviations; 1 Introduction; 1.1 What are Location-based Services?; 1.2 Application Scenarios; 1.2.1 Business Initiatives; 1.2.2 Public Initiatives; 1.3 LBS Actors; 1.4 Standardization; 1.5 Structure of this Book; Part I Fundamentals; 2 What is Location?; 2.1 Location Categories; 2.2 Spatial Location; 2.2.1 Coordinate Systems; 2.2.2 Datums; 2.2.3 Map Projections; 2.3 Conclusion; 3 Spatial Databases and GIS; 3.1 What are Spatial Databases and GIS?; 3.2 Geographic versus Spatial Data Models; 3.3 Representing Spatial Objects
- 3.3.1 Raster Mode3.3.2 Vector Mode; 3.3.3 Representing Topological Relationships; 3.3.4 Database Approaches for Spatial Objects; 3.4 Features and Themes; 3.4.1 Conceptual Schemes; 3.4.2 Operations; 3.4.3 Topological Predicates; 3.4.4 Queries; 3.5 Algorithms of Computational Geometry; 3.6 Geography Markup Language; 3.7 Conclusion; 4 Basics of Wireless Communications; 4.1 Signals; 4.1.1 Modulation; 4.1.2 Representing Signals in the Frequency Domain; 4.1.3 Signal Spectrum and Bandwidth; 4.2 Propagation of Radio Signals; 4.2.1 The Electromagnetic Spectrum; 4.2.2 Antennas
- 4.2.3 Speed of Electromagnetic Waves4.2.4 Attenuation; 4.2.5 Multipath Propagation; 4.2.6 Doppler Effect; 4.3 Multiplexing and Multiple Access; 4.3.1 SDM and SDMA; 4.3.2 FDM and FDMA; 4.3.3 TDM and TDMA; 4.3.4 CDM and CDMA; 4.4 Conclusion; 5 Cellular Networks and Location Management; 5.1 Overview of Cellular Systems; 5.2 Principles of Cellular Networks; 5.2.1 GSM Architecture; 5.2.2 GPRS Architecture; 5.2.3 UMTS Architecture; 5.3 Mobility Management; 5.4 Common Concepts of Location Management; 5.4.1 Location Update and Paging; 5.4.2 Database Concepts; 5.5 Location Management in CS Networks
- 5.5.1 Identifiers and Addresses5.5.2 Localization and Routing; 5.5.3 Location Updates; 5.6 Location Management in PS Networks; 5.6.1 Localization and Routing; 5.6.2 Characteristics of CS and PS Traffic; 5.6.3 Location Updates; 5.7 Conclusion; Part II Positioning; 6 Fundamentals of Positioning; 6.1 Classification of Positioning Infrastructures; 6.1.1 Integrated and Stand-alone Infrastructures; 6.1.2 Network and Terminal-based Positioning; 6.1.3 Satellites, Cellular, and Indoor Infrastructures; 6.2 Basic Positioning Methods; 6.2.1 Proximity Sensing; 6.2.2 Lateration; 6.2.3 Angulation
- 6.2.4 Dead Reckoning6.2.5 Pattern Matching; 6.2.6 Hybrid Approaches; 6.3 Range Measurements; 6.3.1 Time Measurements; 6.3.2 Received Signal Strength; 6.4 Accuracy and Precision; 6.5 Error Sources; 6.6 Conclusion; 7 Satellite Positioning; 7.1 Historical Background; 7.2 Orbital Motion of Satellite Systems; 7.2.1 Satellite Orbits; 7.2.2 Keplerian Elements; 7.3 Global Positioning System; 7.3.1 GPS Segments; 7.3.2 Satellite Constellation; 7.3.3 Pilot Signals and Spreading Codes; 7.3.4 Navigation Message; 7.3.5 GPS Services; 7.3.6 GPS Positioning; 7.3.7 GPS Error Budget; 7.4 Differential GPS
- 7.5 Galileo
