Bluetooth and WAP push based location-aware mobile advertising system
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Universal real-time navigational assistance (URNA): an urban bluetooth beacon for the blind
Proceedings of the 1st ACM SIGMOBILE international workshop on Systems and networking support for healthcare and assisted living environments
Portable and Mobile Systems in Assistive Technology
ICCHP '08 Proceedings of the 11th international conference on Computers Helping People with Special Needs
Real-time walk light detection with a mobile phone
ICCHP'10 Proceedings of the 12th international conference on Computers helping people with special needs
The crosswatch traffic intersection analyzer: a roadmap for the future
ICCHP'12 Proceedings of the 13th international conference on Computers Helping People with Special Needs - Volume Part II
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We describe a complete hardware/software system, dubbed Universal Real-Time Navigational Assistance (URNA), which enables communication of relevant location-aware information to a blind person carrying a Bluetooth-enabled cell phone. Although URNA can be used for a number of different applications (e.g., an information kiosk at a shopping mall or public transit information at a bus stop), we concentrate on the challenging case of an urban intersection. Information provided to the user as he or she approaches the intersection includes a description of the intersection topology and real-time notification of the state of the traffic lights.