Information Propagation Speed in Bidirectional Vehicular Delay Tolerant Networks

1. Information Propagation Speed in Bidirectional Vehicular Delay Tolerant Networks Infocom 2011

2. Introduction • Analysis the information propagation speed in bidirectional vehicular delay tolerant networks on highways. • A threshold(phase transition) • Vehicular speed v.sdramatically propagation • Exact expression • A model based on Poisson point process on continuous space, finite and infinite radio propagation speed.

3. Introducion • Contribution • Develop a new vehicule-to-vehicule model • Show the existence of a threshold • Give the exact expression of this threshold • Under the threshold  the gain follows simple power law • Above the threshold  quasi-exponential • Infinite and finite radio propagation • Simulation

4. Model and result • : the intensity of eastbound vehicle density as Poisson. • : the intensity of westbound vehicle density as Poisson. • : the radio propagation speed • The radio range is 1 • A phase transition occurs when =

6. Model and result • : the duration the beacon waits when blocked for the ithtime • : the distance traveled by the beacon just after • L(t) : the distance traveled by the beacon during a time t on the eastbound lane • 3 • 2

7. Model and result

8. Phase trasition

9. See paper