The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Robotics-based location sensing using wireless ethernet
Proceedings of the 8th annual international conference on Mobile computing and networking
Numerical Recipes in C: The Art of Scientific Computing
Numerical Recipes in C: The Art of Scientific Computing
Link-level measurements from an 802.11b mesh network
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Practical robust localization over large-scale 802.11 wireless networks
Proceedings of the 10th annual international conference on Mobile computing and networking
Bayesian Filtering for Location Estimation
IEEE Pervasive Computing
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Social disclosure of place: from location technology to communication practices
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Particle filters for positioning, navigation, and tracking
IEEE Transactions on Signal Processing
A case study in building layered DHT applications
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
Self-management in chaotic wireless deployments
Proceedings of the 11th annual international conference on Mobile computing and networking
Experiences with place lab: an open source toolkit for location-aware computing
Proceedings of the 28th international conference on Software engineering
Improved access point selection
Proceedings of the 4th international conference on Mobile systems, applications and services
Army-Backed Flexible Display Effort: A Symbol of Public-Private Partnership
IEEE Pervasive Computing
Preserving location privacy in wireless lans
Proceedings of the 5th international conference on Mobile systems, applications and services
Loc{lib,trace,eva,ana}: research tools for 802.11-based positioning systems
Proceedings of the second ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Self-management in chaotic wireless deployments
Wireless Networks
The MobiSoC middleware for mobile social computing: challenges, design, and early experiences
Proceedings of the 1st international conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications
Micro-Blog: sharing and querying content through mobile phones and social participation
Proceedings of the 6th international conference on Mobile systems, applications, and services
Vehicular Ad Hoc Networks: A New Challenge for Localization-Based Systems
Computer Communications
BreadCrumbs: forecasting mobile connectivity
Proceedings of the 14th ACM international conference on Mobile computing and networking
AAMPL: accelerometer augmented mobile phone localization
Proceedings of the first ACM international workshop on Mobile entity localization and tracking in GPS-less environments
Indoor localization based on response rate of bluetooth inquiries
Proceedings of the first ACM international workshop on Mobile entity localization and tracking in GPS-less environments
Scale-dependency in IP-based positioning of network clusters
Journal of Location Based Services - 4th International Conference on LBS and TeleCartography Hong Kong
Nericell: rich monitoring of road and traffic conditions using mobile smartphones
Proceedings of the 6th ACM conference on Embedded network sensor systems
MobiSoC: a middleware for mobile social computing applications
Mobile Networks and Applications
Access Point Localization Using Local Signal Strength Gradient
PAM '09 Proceedings of the 10th International Conference on Passive and Active Network Measurement
Journal of Location Based Services
Constructing accurate, space-efficient, wireless coverage maps for vehicular contexts
Proceedings of the 4th Annual International Conference on Wireless Internet
Virtual WiFi network database construction for positioning services
CFI '09 Proceedings of the 4th International Conference on Future Internet Technologies
SurroundSense: mobile phone localization using ambient sound and light
ACM SIGMOBILE Mobile Computing and Communications Review
Error Estimation for Indoor 802.11 Location Fingerprinting
LoCA '09 Proceedings of the 4th International Symposium on Location and Context Awareness
Utilizing Wireless Positioning as a Tracking Data Source
SSTD '09 Proceedings of the 11th International Symposium on Advances in Spatial and Temporal Databases
Ubikequitous computing: designing interactive experiences for cyclists
Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services
SurroundSense: mobile phone localization via ambience fingerprinting
Proceedings of the 15th annual international conference on Mobile computing and networking
VTrack: accurate, energy-aware road traffic delay estimation using mobile phones
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Sentient bikes for collecting mobility traces in opportunistic networks
Proceedings of the 1st ACM International Workshop on Hot Topics of Planet-Scale Mobility Measurements
Navigation using environmental constraints
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Unsupervised Learning for Solving RSS Hardware Variance Problem in WiFi Localization
Mobile Networks and Applications
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
How computer vision can help in outdoor positioning
AmI'07 Proceedings of the 2007 European conference on Ambient intelligence
A taxonomy for radio location fingerprinting
LoCA'07 Proceedings of the 3rd international conference on Location-and context-awareness
Signal dragging: effects of terminal movement on war-driving in CDMA/WCDMA networks
LoCA'07 Proceedings of the 3rd international conference on Location-and context-awareness
Lightweight jammer localization in wireless networks: system design and implementation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Towards mobile phone localization without war-driving
INFOCOM'10 Proceedings of the 29th conference on Information communications
Did you see Bob?: human localization using mobile phones
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Accuracy characterization of cell tower localization
Proceedings of the 12th ACM international conference on Ubiquitous computing
Mobile location tracking in metro areas: malnets and others
Proceedings of the 17th ACM conference on Computer and communications security
SensLoc: sensing everyday places and paths using less energy
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
StarTrack next generation: a scalable infrastructure for track-based applications
OSDI'10 Proceedings of the 9th USENIX conference on Operating systems design and implementation
Energy-efficient mobile video management using smartphones
MMSys '11 Proceedings of the second annual ACM conference on Multimedia systems
Energy-efficient positioning for smartphones using Cell-ID sequence matching
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Third party geolocation services in LBS: privacy requirements and research issues
Transactions on Data Privacy
Autonomous construction of a WiFi access point map using multidimensional scaling
Pervasive'11 Proceedings of the 9th international conference on Pervasive computing
Lessons from touring a location-based experience
Pervasive'11 Proceedings of the 9th international conference on Pervasive computing
Seeker-assisted human navigation using smart phones
Proceedings of 1st international symposium on From digital footprints to social and community intelligence
Locating experience: touring a pervasive performance
Personal and Ubiquitous Computing
A 3-D indoor radio propagation model for WiFi and RFID
Proceedings of the 9th ACM international symposium on Mobility management and wireless access
Context guided and personalized activity classification system
Proceedings of the 2nd Conference on Wireless Health
Particle filters for position sensing with asynchronous ultrasonic beacons
LoCA'06 Proceedings of the Second international conference on Location- and Context-Awareness
Risks of using AP locations discovered through war driving
PERVASIVE'06 Proceedings of the 4th international conference on Pervasive Computing
Practical metropolitan-scale positioning for GSM phones
UbiComp'06 Proceedings of the 8th international conference on Ubiquitous Computing
Augmenting mobile localization with activities and common sense knowledge
AmI'11 Proceedings of the Second international conference on Ambient Intelligence
You are facing the Mona Lisa: spot localization using PHY layer information
Proceedings of the 10th international conference on Mobile systems, applications, and services
No need to war-drive: unsupervised indoor localization
Proceedings of the 10th international conference on Mobile systems, applications, and services
Centaur: locating devices in an office environment
Proceedings of the 18th annual international conference on Mobile computing and networking
Zee: zero-effort crowdsourcing for indoor localization
Proceedings of the 18th annual international conference on Mobile computing and networking
Wearable mixed reality system In less than 1 pound
EGVE'06 Proceedings of the 12th Eurographics conference on Virtual Environments
Proceedings of the Fourth ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness
A survey on smartphone-based systems for opportunistic user context recognition
ACM Computing Surveys (CSUR)
Stop questioning me!: towards optimizing user involvement during data collection on mobile devices
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
ParkSense: a smartphone based sensing system for on-street parking
Proceedings of the 19th annual international conference on Mobile computing & networking
SmartLoc: push the limit of the inertial sensor based metropolitan localization using smartphone
Proceedings of the 19th annual international conference on Mobile computing & networking
LocateMe: Magnetic-fields-based indoor localization using smartphones
ACM Transactions on Intelligent Systems and Technology (TIST) - Survey papers, special sections on the semantic adaptive social web, intelligent systems for health informatics, regular papers
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
Dejavu: an accurate energy-efficient outdoor localization system
Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Smart cities software: customized messages for mobile subscribers
WiFlex'13 Proceedings of the First international conference on Wireless Access Flexibility
Bluetooth aided mobile phone localization: A nonlinear neural circuit approach
ACM Transactions on Embedded Computing Systems (TECS)
Smartphone-based indoor pedestrian tracking using geo-magnetic observations
Mobile Information Systems
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Location systems have long been identified as an important component of emerging mobile applications. Most research on location systems has focused on precise location in indoor environments. However, many location applications (for example, location-aware web search) become interesting only when the underlying location system is available ubiquitously and is not limited to a single office environment. Unfortunately, the installation and calibration overhead involved for most of the existing research systems is too prohibitive to imagine deploying them across, say, an entire city. In this work, we evaluate the feasibility of building a wide-area 802.11 Wi-Fi-based positioning system. We compare a suite of wireless-radio-based positioning algorithms to understand how they can be adapted for such ubiquitous deployment with minimal calibration. In particular, we study the impact of this limited calibration on the accuracy of the positioning algorithms. Our experiments show that we can estimate a user's position with a median positioning error of 13-40 meters (depending upon the characteristics of the environment). Although this accuracy is lower than existing positioning systems, it requires substantially lower calibration overhead and provides easy deployment and coverage across large metropolitan areas.