The active badge location system
ACM Transactions on Information Systems (TOIS)
Range-free localization schemes for large scale sensor networks
Proceedings of the 9th annual international conference on Mobile computing and networking
An architecture for privacy-sensitive ubiquitous computing
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Practical robust localization over large-scale 802.11 wireless networks
Proceedings of the 10th annual international conference on Mobile computing and networking
Delivering real-world ubiquitous location systems
Communications of the ACM - The disappearing computer
The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Pedestrian Tracking with Shoe-Mounted Inertial Sensors
IEEE Computer Graphics and Applications
A robustness analysis of multi-hop ranging-based localization approximations
Proceedings of the 5th international conference on Information processing in sensor networks
PinPoint: An Asynchronous Time-Based Location Determination System
Proceedings of the 4th international conference on Mobile systems, applications and services
Pedestrian localisation for indoor environments
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Spinning beacons for precise indoor localization
Proceedings of the 6th ACM conference on Embedded network sensor systems
Proceedings of the 6th ACM conference on Embedded network sensor systems
SurroundSense: mobile phone localization via ambience fingerprinting
Proceedings of the 15th annual international conference on Mobile computing and networking
Simultaneous localization and mapping for pedestrians using only foot-mounted inertial sensors
Proceedings of the 11th international conference on Ubiquitous computing
Did you see Bob?: human localization using mobile phones
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
AutoWitness: locating and tracking stolen property while tolerating GPS and radio outages
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
SensLoc: sensing everyday places and paths using less energy
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Accuracy Performance Analysis between War Driving and War Walking in Metropolitan Wi-Fi Localization
IEEE Transactions on Mobile Computing
Indoor localization without infrastructure using the acoustic background spectrum
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Collaborative PDR Localisation with Mobile Phones
ISWC '11 Proceedings of the 2011 15th Annual International Symposium on Wearable Computers
Employing user feedback for semantic location services
Proceedings of the 13th international conference on Ubiquitous computing
On the feasibility of real-time phone-to-phone 3D localization
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Virtual compass: relative positioning to sense mobile social interactions
Pervasive'10 Proceedings of the 8th international conference on Pervasive Computing
Proceedings of the 11th international conference on Information Processing in Sensor Networks
GPS-Equipped wireless sensor network node for high-accuracy positioning applications
EWSN'12 Proceedings of the 9th European conference on Wireless Sensor Networks
Scalable Activity-Travel Pattern Monitoring Framework for Large-Scale City Environment
IEEE Transactions on Mobile Computing
Encounter based sensor tracking
Proceedings of the thirteenth ACM international symposium on Mobile Ad Hoc Networking and Computing
SwordFight: enabling a new class of phone-to-phone action games on commodity phones
Proceedings of the 10th international conference on Mobile systems, applications, and services
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
Zee: zero-effort crowdsourcing for indoor localization
Proceedings of the 18th annual international conference on Mobile computing and networking
Probabilistic models for mobile phone trajectory estimation
Probabilistic models for mobile phone trajectory estimation
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Location-based services, such as targeted advertisement, geo-social networking and emergency services, are becoming increasingly popular for mobile applications. While GPS provides accurate outdoor locations, accurate indoor localization schemes still require either additional infrastructure support (e.g., ranging devices) or extensive training before system deployment (e.g., WiFi signal fingerprinting). In order to help existing localization systems to overcome their limitations or to further improve their accuracy, we propose Social-Loc, a middleware that takes the potential locations for individual users, which is estimated by any underlying indoor localization system as input and exploits both social encounter and non-encounter events to cooperatively calibrate the estimation errors. We have fully implemented Social-Loc on the Android platform and demonstrated its performance on two underlying indoor localization systems: Dead-reckoning and WiFi fingerprint. Experiment results show that Social-Loc improves user's localization accuracy of WiFi fingerprint and dead-reckoning by at least 22% and 37%, respectively. Large-scale simulation results indicate Social-Loc is scalable, provides good accuracy for a long duration of time, and is robust against measurement errors.