11-10-2016, 09:20 AM
Co-operative Positioning andTracking in Disruption Tolerant Networks with Unsafe Networks using Pulse Counting Assess
1458543636-16PROJECTABSTRACT.docx (Size: 12.21 KB / Downloads: 4)
ABSTRACT
The increasing number of location-dependent applications, positioning and tracking a mobile device becomes more important to enable pervasive and context-aware service which performed in physical localization and logical localization for satellite, GSM and WiFi communication networks where fixed reference points are densely-deployed, positioning and tracking techniques in a sparse disruption tolerant network (DTN) have not been well addressed.we propose a decentralized cooperative method called PulseCounting for DTN localization and a probabilistic tracking method called ProbTracking to confront this challenge. PulseCounting evaluates the user walking steps and movement orientations using accelerometer and electronic compass equipped in cellphones.It estimates user location by accumulating the walking segments, and improves the estimation accuracy by exploiting the encounters of mobile nodes. To track user movement, the proposed ProbTracking method uses Markov chain to describe movement patterns and determines the most possible user walking trajectories without full record of user locations average deviation is less than 9m in our system compared to GPS.