Location- and Context-Awareness

1. Front Matter

   PDF

2. Keynote

   1. Location Awareness: Potential Benefits and Risks

      • Vidal Ashkenazi

      Pages 1-1

3. Context Information Management and Distribution

   1. Context Modelling and Management in Ambient-Aware Pervasive Environments

      • Maria Strimpakou, Ioanna Roussaki, Carsten Pils, Michael Angermann, Patrick Robertson, Miltiades Anagnostou

      Pages 2-15

   2. A Context Architecture for Service-Centric Systems

      • Johanneke Siljee, Sven Vintges, Jos Nijhuis

      Pages 16-25

   3. Towards Realizing Global Scalability in Context-Aware Systems

      • Thomas Buchholz, Claudia Linnhoff-Popien

      Pages 26-39

4. Positioning Sensor Systems I

   1. Towards LuxTrace: Using Solar Cells to Measure Distance Indoors

      • Julian Randall, Oliver Amft, Gerhard Tröster

      Pages 40-51

   2. Three Step Bluetooth Positioning

      • Alessandro Genco

      Pages 52-62

   3. MoteTrack: A Robust, Decentralized Approach to RF-Based Location Tracking

      • Konrad Lorincz, Matt Welsh

      Pages 63-82

5. Positioning Sensor Systems II

   1. Correcting GPS Readings from a Tracked Mobile Sensor

      • Richard Milton, Anthony Steed

      Pages 83-94

   2. Web-Enhanced GPS

      • Ramaswamy Hariharan, John Krumm, Eric Horvitz

      Pages 95-104

   3. The COMPASS Location System

      • Frank Kargl, Alexander Bernauer

      Pages 105-112

   4. The xPOI Concept

      • Jens Krösche, Susanne Boll

      Pages 113-119

6. Positioning Sensor Systems III

   1. The GETA Sandals: A Footprint Location Tracking System

      • Kenji Okuda, Shun-yuan Yeh, Chon-in Wu, Keng-hao Chang, Hao-hua Chu

      Pages 120-131

   2. Improving the Accuracy of Ultrasound–Based Localisation Systems

      • Hubert Piontek, Matthias Seyffer, Jörg Kaiser

      Pages 132-143

   3. Position Estimation of Wireless Access Point Using Directional Antennas

      • Hirokazu Satoh, Seigo Ito, Nobuo Kawaguchi

      Pages 144-156

7. From Location to Context

   1. Exploiting Multiple Radii to Learn Significant Locations

      • Norio Toyama, Takashi Ota, Fumihiro Kato, Youichi Toyota, Takashi Hattori, Tatsuya Hagino

      Pages 157-168

   2. Modeling Cardinal Directional Relations Between Fuzzy Regions Based on Alpha-Morphology

      • Haibin Sun, Wenhui Li

      Pages 169-179

   3. Commonsense Spatial Reasoning for Context–Aware Pervasive Systems

      • Stefania Bandini, Alessandro Mosca, Matteo Palmonari

      Pages 180-188

   4. Contextually Aware Information Delivery in Pervasive Computing Environments

      • Ian Millard, David De Roure, Nigel Shadbolt

      Pages 189-197

8. Bayesian Networks

   1. Classifying the Mobility of Users and the Popularity of Access Points

      • Minkyong Kim, David Kotz

      Pages 198-210

Context-awareness is one of the drivers of the ubiquitous computing paradigm. Well-designed context modeling and context retrieval approaches are key p- requisites in any context-aware system. Location is one of the primary aspects of all major context models — together with time, identity and activity. From the technical side, sensing, fusing and distributing location and other context information is as important as providing context-awareness to applications and services in pervasive systems. Thematerialsummarizedinthisvolumewasselectedforthe1stInternational Workshop on Location- and Context-Awareness (LoCA 2005) held in coope- tion with the 3rd International Conference on Pervasive Computing 2005. The workshop was organized by the Institute of Communications and Navigation of the German Aerospace Center (DLR) in Oberpfa?enhofen, and the Mobile and Distributed Systems Group of the University of Munich. During the workshop, novel positioning algorithms and location sensing te- niques were discussed, comprising not only enhancements of singular systems, like positioning in GSM or WLAN, but also hybrid technologies, such as the integration of global satellite systems with inertial positioning. Furthermore, - provements in sensor technology, as well as the integration and fusion of sensors, were addressed both on a theoretical and on an implementation level. Personal and con?dential data, such as location data of users, have p- found implications for personal information privacy. Thus privacy protection, privacy-oriented location-aware systems, and how privacy a?ects the feasibility and usefulness of systems were also addressed in the workshop.

• Bluetooth
• GPS
• QoS
• antenna
• architecture
• context-aware computing
• filtering
• location sensing
• location-aware communication services
• location-aware systems
• pervasive computing
• positioning algorithms
• sensor integration
• sensor networks
• ubiquitous computing

• Institute of Communications and Navigation, German Aerospace Center, 82234 Wessling/Oberpfaffenhofen, Germany, and Digital Enterprise Research Institute (DERI), University of Innsbruck, 6020 Innsbruck,, Austria

  Thomas Strang

• Mobile and Distributed Systems Group, Institute for Informatics, Ludwig-Maximilian University Munich, Germany

  Claudia Linnhoff-Popien

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