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1. GLOBALSOFT TECHNOLOGIES
Trajectory Improves Data Delivery in Urban Vehicular
Networks
Abstract
Efficient data delivery is of great importance, but highly challenging for vehicular
networks because of frequent network disruption, fast topological change and
mobility uncertainty. The vehicular trajectory knowledge plays a key role in data
delivery. Existing algorithms have largely made predictions on the trajectory with
coarse-grained patterns such as spatial distribution or/and the inter-meeting time
distribution, which has led to poor data delivery performance. In this paper, we mine
the extensive data sets of vehicular traces from two large cities in China, i.e.,
Shanghai and Shenzhen, through conditional entropy analysis, we find that there
exists strong spatiotemporal regularity with vehicle mobility. By extracting mobility
patterns from historical vehicular traces, we develop accurate trajectory predictions
by using multiple order Markov chains. Based on an analytical model, we
theoretically derive packet delivery probability with predicted trajectories. We then
propose routing algorithms taking full advantage of predicted probabilistic vehicular
trajectories. Finally, we carry out extensive simulations based on three large data
sets of real GPS vehicular traces, i.e., Shanghai taxi data set, Shanghai bus data set
and Shenzhen taxi data set. The conclusive results demonstrate that our proposed
routing algorithms can achieve significantly higher delivery ratio at lower cost when
compared with existing algorithms.
Existing system
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2. Efficient data delivery is of great importance, but highly challenging for vehicular
networks because of frequent network disruption, fast topological change and
mobility uncertainty. The vehicular trajectory knowledge plays a key role in data
delivery. Existing algorithms have largely made predictions on the trajectory with
coarse-grained patterns such as spatial distribution or/and the inter-meeting time
distribution, which has led to poor data delivery performance.
Proposed system
, we mine the extensive data sets of vehicular traces from two large cities in China,
i.e., Shanghai and Shenzhen, through conditional entropy analysis, we find that
there exists strong spatiotemporal regularity with vehicle mobility. By extracting
mobility patterns from historical vehicular traces, we develop accurate trajectory
predictions by using multiple order Markov chains. Based on an analytical model, we
theoretically derive packet delivery probability with predicted trajectories. We then
propose routing algorithms taking full advantage of predicted probabilistic vehicular
trajectories. Finally, we carry out extensive simulations based on three large data
sets of real GPS vehicular traces, i.e., Shanghai taxi data set, Shanghai bus data set
and Shenzhen taxi data set. The conclusive results demonstrate that our proposed
routing algorithms can achieve significantly higher delivery ratio at lower cost when
compared with existing algorithms.
SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)
 Hard Disk - 20 GB

3. SOFTWARE CONFIGURATION:-
 Operating System : Windows XP
 Programming Language : JAVA
 Java Version : JDK 1.6 & above.