Accuracy characterization for metropolitan-scale Wi-Fi localization
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Enhancing Security and Privacy in Traffic-Monitoring Systems
IEEE Pervasive Computing
CarTel: a distributed mobile sensor computing system
Proceedings of the 4th international conference on Embedded networked sensor systems
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
Surface street traffic estimation
Proceedings of the 5th international conference on Mobile systems, applications and services
Preserving privacy in gps traces via uncertainty-aware path cloaking
Proceedings of the 14th ACM conference on Computer and communications security
Virtual trip lines for distributed privacy-preserving traffic monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
Micro-Blog: sharing and querying content through mobile phones and social participation
Proceedings of the 6th international conference on Mobile systems, applications, and services
Nericell: rich monitoring of road and traffic conditions using mobile smartphones
Proceedings of the 6th ACM conference on Embedded network sensor systems
Inference attacks on location tracks
PERVASIVE'07 Proceedings of the 5th international conference on Pervasive computing
ParkNet: drive-by sensing of road-side parking statistics
Proceedings of the 8th international conference on Mobile systems, applications, and services
Energy-accuracy trade-off for continuous mobile device location
Proceedings of the 8th international conference on Mobile systems, applications, and services
Challenges in ubiquitous context recognition with personal mobile devices
Proceedings of the 4th ACM International Workshop on Context-Awareness for Self-Managing Systems
Prioritized gossip in vehicular networks
Proceedings of the 6th International Workshop on Foundations of Mobile Computing
Vehicular speed estimation using received signal strength from mobile phones
Proceedings of the 12th ACM international conference on Ubiquitous computing
A survey of mobile phone sensing
IEEE Communications Magazine
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
Cooperative transit tracking using smart-phones
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Mobile data offloading: how much can WiFi deliver?
Proceedings of the 6th International COnference
StarTrack next generation: a scalable infrastructure for track-based applications
OSDI'10 Proceedings of the 9th USENIX conference on Operating systems design and implementation
PLASH: a platform for location aware services with human computation
IEEE Communications Magazine
Accurate, low-energy trajectory mapping for mobile devices
Proceedings of the 8th USENIX conference on Networked systems design and implementation
Improving wireless network performance using sensor hints
Proceedings of the 8th USENIX conference on Networked systems design and implementation
A new paradigm for urban surveillance with vehicular sensor networks
Computer Communications
MELOS: a low-cost and low-energy generic sensing attachment for mobile phones
NSDR '11 Proceedings of the 5th ACM workshop on Networked systems for developing regions
SignalGuru: leveraging mobile phones for collaborative traffic signal schedule advisory
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Scheduling for real-time mobile MapReduce systems
Proceedings of the 5th ACM international conference on Distributed event-based system
Review: From wireless sensor networks towards cyber physical systems
Pervasive and Mobile Computing
HartFi: an energy-efficient localization system
Proceedings of the 2nd ACM SIGCOMM workshop on Green networking
Driving with knowledge from the physical world
Proceedings of the 17th ACM SIGKDD international conference on Knowledge discovery and data mining
Seeker-assisted human navigation using smart phones
Proceedings of 1st international symposium on From digital footprints to social and community intelligence
Route classification using cellular handoff patterns
Proceedings of the 13th international conference on Ubiquitous computing
Mobile sensing: challenges, opportunities and future directions
Proceedings of the 13th international conference on Ubiquitous computing
A survey on privacy in mobile participatory sensing applications
Journal of Systems and Software
Distributed road surface condition monitoring using mobile phones
UIC'11 Proceedings of the 8th international conference on Ubiquitous intelligence and computing
EasyTracker: automatic transit tracking, mapping, and arrival time prediction using smartphones
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
V-Cloud: vehicular cyber-physical systems and cloud computing
Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
EnAcq: energy-efficient GPS trajectory data acquisition based on improved map matching
Proceedings of the 19th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
ScanTraffic: smart camera network for traffic information collection
EWSN'12 Proceedings of the 9th European conference on Wireless Sensor Networks
Online windowed subsequence matching over probabilistic sequences
SIGMOD '12 Proceedings of the 2012 ACM SIGMOD International Conference on Management of Data
AutoWitness: Locating and tracking stolen property while tolerating GPS and radio outages
ACM Transactions on Sensor Networks (TOSN)
Android genetic programming framework
EuroGP'12 Proceedings of the 15th European conference on Genetic Programming
How long to wait?: predicting bus arrival time with mobile phone based participatory sensing
Proceedings of the 10th international conference on Mobile systems, applications, and services
Dynamic QoS-aware event sampling for community-based participatory sensing systems
Proceedings of the 6th ACM International Conference on Distributed Event-Based Systems
An integrated cloud-based framework for mobile phone sensing
Proceedings of the first edition of the MCC workshop on Mobile cloud computing
Crowdsourcing to smartphones: incentive mechanism design for mobile phone sensing
Proceedings of the 18th annual international conference on Mobile computing and networking
Personalized driving behavior monitoring and analysis for emerging hybrid vehicles
Pervasive'12 Proceedings of the 10th international conference on Pervasive Computing
Hardware and software for skateboard trick visualisation on a mobile phone
Proceedings of the South African Institute for Computer Scientists and Information Technologists Conference
A case for automatic sharing over social networks
Proceedings of the First ACM International Workshop on Hot Topics on Interdisciplinary Social Networks Research
A hierarchical back-end architecture for smartphone sensing
Proceedings of the 2012 ACM Research in Applied Computation Symposium
Developing a mobile recommender system
Proceedings of the 5th International Conference on PErvasive Technologies Related to Assistive Environments
Map inference in the face of noise and disparity
Proceedings of the 20th International Conference on Advances in Geographic Information Systems
Matching GPS traces to (possibly) incomplete map data: bridging map building and map matching
Proceedings of the 20th International Conference on Advances in Geographic Information Systems
Fast Viterbi map matching with tunable weight functions
Proceedings of the 20th International Conference on Advances in Geographic Information Systems
IODetector: a generic service for indoor outdoor detection
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Kyun queue: a sensor network system to monitor road traffic queues
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Tracking unmodified smartphones using wi-fi monitors
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Sense-And-Trace: a privacy preserving distributed geolocation tracking system
SP'12 Proceedings of the 20th international conference on Security Protocols
Uncaught signal imputation for accuracy enhancement of WLAN-based positioning systems
Proceedings of the First ACM SIGSPATIAL International Workshop on Mobile Geographic Information Systems
Quantifying the potential of ride-sharing using call description records
Proceedings of the 14th Workshop on Mobile Computing Systems and Applications
On assessing the accuracy of positioning systems in indoor environments
EWSN'13 Proceedings of the 10th European conference on Wireless Sensor Networks
Proceedings of the International Conference on Management of Emergent Digital EcoSystems
ε-Matching: event processing over noisy sequences in real time
Proceedings of the 2013 ACM SIGMOD International Conference on Management of Data
Intelligent search in social communities of smartphone users
Distributed and Parallel Databases
Efficient event detection by exploiting crowds
Proceedings of the 7th ACM international conference on Distributed event-based systems
A DIY power monitor to compare mobile energy consumption in situ
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
Mobile applications need targeted micro-updates
Proceedings of the 4th Asia-Pacific Workshop on Systems
Mobile data offloading: how much can WiFi deliver?
IEEE/ACM Transactions on Networking (TON)
Exploiting social networks for healthcare
Proceedings of the 6th International Conference on PErvasive Technologies Related to Assistive Environments
Whose "city of tomorrow" is it?: on urban computing, utopianism, and ethics
Proceedings of the 2nd ACM SIGKDD International Workshop on Urban Computing
Proceedings of the 2013 ACM SIGPLAN international conference on Object oriented programming systems languages & applications
Proceedings of the third ACM international symposium on Design and analysis of intelligent vehicular networks and applications
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
Smart traffic monitoring with participatory sensing
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
Map matching: comparison of approaches using sparse and noisy data
Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Thrifty tracking: online GPS tracking with low data uplink usage
Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Managing smartphone testbeds with smartlab
LISA'13 Proceedings of the 27th international conference on Large Installation System Administration
From big smartphone data to worldwide research: The Mobile Data Challenge
Pervasive and Mobile Computing
Synergistic approaches to mobile intelligent transportation systems considering low penetration rate
Pervasive and Mobile Computing
Hi-index | 0.00 |
Traffic delays and congestion are a major source of inefficiency, wasted fuel, and commuter frustration. Measuring and localizing these delays, and routing users around them, is an important step towards reducing the time people spend stuck in traffic. As others have noted, the proliferation of commodity smartphones that can provide location estimates using a variety of sensors---GPS, WiFi, and/or cellular triangulation---opens up the attractive possibility of using position samples from drivers' phones to monitor traffic delays at a fine spatiotemporal granularity. This paper presents VTrack, a system for travel time estimation using this sensor data that addresses two key challenges: energy consumption and sensor unreliability. While GPS provides highly accurate location estimates, it has several limitations: some phones don't have GPS at all, the GPS sensor doesn't work in "urban canyons" (tall buildings and tunnels) or when the phone is inside a pocket, and the GPS on many phones is power-hungry and drains the battery quickly. In these cases, VTrack can use alternative, less energy-hungry but noisier sensors like WiFi to estimate both a user's trajectory and travel time along the route. VTrack uses a hidden Markov model (HMM)-based map matching scheme and travel time estimation method that interpolates sparse data to identify the most probable road segments driven by the user and to attribute travel times to those segments. We present experimental results from real drive data and WiFi access point sightings gathered from a deployment on several cars. We show that VTrack can tolerate significant noise and outages in these location estimates, and still successfully identify delay-prone segments, and provide accurate enough delays for delay-aware routing algorithms. We also study the best sampling strategies for WiFi and GPS sensors for different energy cost regimes.