N VFC the computational tasks

N VFC the computational tasks, storage services, and com-
munication facilities are provided at vehicles end. A layer
of fog server is established between the cloud server and the
vehicles. VFC takes the advantages of multihop characteristic
and moving features of the vehicles to carry the information
from one place to another 1. VFC can not only play a vital
role by improving the traditional traffic safety facilities, but
also by the efficient utilization of the wireless communication
capabilities.
However, the large-scale deployment and the realistic ex-
perimental testing of a VFC architecture is not feasible in
urban environments. Some important aspects that are related
to the complex vehicular mobility and communications, should
be realized in the simulation and analysis of the VFC. In
order to realize these aspects for many future ITS applications,
varying from the simple safety messages and infotainment
to the autonomous driving, a robust network of connected
vehicles is essential. A critical aspect is the requirement for
a model that would reflect a realistic imitation of vehicular
traffic, as it has a deep impact on the message delivery delay
in VANET 2. The Dynamic connection between the network
simulator and the traffic simulator has a key importance in
vehicular communications 3.
Recently, many VANET simulation frameworks have com-
bined different traffic and network simulators. They mostly
assign the simulation control to a third manager entity. How-
ever, in such case, the ability for evolution of the cooperative
framework cannot be fully ensured for the VFC. As a matter of
fact, if the third entity that implements the control management
gets obsolete, then its substitution is a big challenge for the
latest simulators. Therefore, there is an utmost requirement for
a cooperative framework model that is built inside the network
simulator. Such framework would update the control manage-
ment section of the network simulator, instead of acting as a
third manager entity. Hence it would totally ensure the ability
to evolve with the future versions of the connected simulators.
The prominent contribution of this work is summarized as
follows:
• We have proposed a simulation framework, which pro-
vides a dynamic connection of the realistic mobility
simulator (SUMO) with the networking simulator (NS3),
for the simulation and analysis of various VFC solutions.
• We have performed the analysis of VFC computation
capacity under varying nature of road traffic in order
to locate the optimum geographical regions for the
placement of VFC servers. The proposed scheme makes
a TCP socket connection with SUMO 4 and performs
thread handling to get heading information of each
vehicle. Then it computes the velocity components and
delivers to the NS3 simulation state at the exact required
time instant.
• The proposed model has the capability to evolve with
the upcoming versions of these simulators. We have also
performed the evaluation of the overall computational
gain that can be achieved using WAVE architecture along
with formation of fog computing clusters.
The paper is organized as follows. Section II portrays the
related work. Section III gives an overview of the VFC for
industry. Section IV briefly describes the proposed scheme and
simulation approach, Section V presents evaluation of PySNS3
and section VI shows the results and observations. Finally,
Section VII contains the conclusion of this work.