Design of Cooperative Vehicle Safety Systems Based on Tight Coupling of Communication, Computing and Physical Vehicle Dynamics. Yaser P. Fallah , ChingLing Huang, Raja Sengupta , Hariharan Krishnan
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Design of Cooperative Vehicle Safety Systems Based onTight Coupling of Communication, Computing andPhysical Vehicle Dynamics
Yaser P. Fallah, ChingLingHuang, Raja Sengupta,Hariharan Krishnan
Univ of California, BerkleyUniv of California, BerkleyUniv of California, BerkleyGeneral Motors R&D
Fig 1: V2V CVS Communication using DSRC
Fig 2: Network Traveler Soft Safety warning system
For a given values of rate R and traffic density ρ, there exists a value of D which
Yields maximum IDR.
For a selected R, an optimal operation can be reached by varying the D value.
Figure 5 Information Dissemination Rate vs. range of transmission for different
transmission rates, ρ=.1
Figure 6 5 Information Dissemination Ratevs. range of transmission for different
transmission rates, ρ=.2
Figure 7 The effect of transmission range (D) and rate (R) choices on channel occupancy (U)
Figure 8 IDR vs. channel occupancy for different values of R(5-115 msg/sec), D(20-400m), and ρ (0.1-0.2
In the relation between IDR and U, For different values of R, D, ρ it can be
observed that all the IDR values fall on a single curve which means that IDR and
U are related.
It means that a controller must be designed to run at an optimal channel occupancy
Where IDR is maximum. (in this case, channel occupancy is 0.6)
Range control algorithm
Controller must maintain U between Umin = 0.4 and Umax= 0.8.
Figure 12 OPNET and SHIFT simulation results for different
traffic scenarios, the proposed range control scheme vs. fixed