Vanet Simulation NS3

Vanet Simulation NS3 – Vehicular Ad Hoc Networks (VANETs) are emerging new technology to integrate the capabilities of new generation wireless networks to vehicles

Applications of VANET:

• Real-time detour routes computation
• Co-operative traffic monitoring
• Blind crossing
• Control of traffic flows
• Prevention of collisions
• Nearby information services
• Providing internet connectivity to vehicular nodes etc.

Characteristics of VANET:

• It has various communication environments
• Sufficient energy and storage
• Hardware delay constraint
• High dynamic topology
• Geographical type of communication
• Interaction with on-board sensors
• Mobility modeling and predication
• Frequently disconnected network etc.

Researches on VANET:

• Defining security mechanisms in VANET
• To improve road and vehicle safety
• Design adaptive and efficient channel estimation algorithm
• Broadcasting schemes in VANET
• Enhancing privacy in VANET Projects etc.

VANET architecture:

Sample code for vanet:

bool Controller::ControlVehicle(Ptr<Highway> highway, Ptr<Vehicle> vehicle, double dt)
{
if(Plot==true)
{
bool newStep=false;
double now=Simulator::Now().GetHighPrecision().GetDouble();
if(now > T)
{
T = now;
newStep=true;
}
if(newStep==true)
{
if(T!=0.0)
{
cout << "e" << endl;
//cout << "pause " << dt << endl;
}
float xrange = highway->GetHighwayLength();
float yrange = highway->GetLaneWidth()*highway->GetNumberOfLanes();
if(highway->GetTwoDirectional()) yrange=2*yrange + highway->GetMedianGap();
cout << "set xrange [0:"<< xrange <<"]" << endl;
cout << "set yrange [0:"<< yrange <<"]" << endl;
cout << "plot '-' w points" << endl;
newStep=false;
}
if(newStep==false)
{
cout << vehicle->GetPosition().x << " " << vehicle->GetPosition().y << endl;
}
}
if(vehicle->GetVehicleId()==2 && vehicle->GetPosition().x >=400)
{
vehicle->SetAcceleration(-2.0);
return true;
}
return false;
}
void Controller::BroadcastWarning(Ptr<Vehicle> veh)
{
stringstream msg;
msg << veh->GetVehicleId()
<< " " << veh->GetPosition().x
<< " has blocked the road at x=" << veh->GetPosition().x
<< " direction=" << veh->GetDirection()
<< " lane=" << veh->GetLane();
Ptr<Packet> packet = Create<Packet>((uint8_t*) msg.str().c_str(), msg.str().length());
veh->SendTo(veh->GetBroadcastAddress(), packet);
Simulator::Schedule(Seconds(5.0),&Controller::BroadcastWarning, this, veh);  }