NS3 Vanet Simulation

NS3 Vanet Simulation

Vehicular Ad hoc Network (VANET), a subclass of mobile Ad Hoc networks (MANETs), is a promising approach for future intelligent transportation system (ITS). These networks have no fixed infrastructure and instead rely on the vehicles themselves to provide network functionality.

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Challenges on VANET:

  • Admission control.
  • Service differentiation.
  • Geographical routing.
  • Power assignment.
  • Clustering.
  • Efficient broadcasting.
  • Opportunistic routing.
  • Trajectory forwarding.

Networking properties of NS3 VANET Simulation:

  • Content of messages can change the network topology.
  • Potentially large-scale network.
  • Variable network density.
  • Rapid changes in the VANETs topology is difficult to manage.
  • Rapid changes in link’s connectivity cause many paths to disconnect before they can be utilized.
  • No significant power constraints.
  • It’s subject to frequent fragmentation, even at a high rate of network deployment.
Architecture of NS3 Vanet Simulation

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Sample code for NS3 VANET Simulation:
This is the sample code of vanet routing protocol.
void
RoutingHelper::SetupRoutingProtocol (NodeContainer & c)
{
AodvHelper aodv;
OlsrHelper olsr;
DsdvHelper dsdv;
DsrHelper dsr;
DsrMainHelper dsrMain;
Ipv4ListRoutingHelper list;
InternetStackHelper internet;
Time rtt = Time (5.0);
AsciiTraceHelper ascii;
Ptr rtw = ascii.CreateFileStream (“routing_table”);
switch (m_protocol)
{
case 0:
m_protocolName = “NONE”;
break;
case 1:
if (m_routingTables != 0)
{
olsr.PrintRoutingTableAllAt (rtt, rtw);
}
list.Add (olsr, 100);
m_protocolName = “OLSR”;
break;
case 2:
if (m_routingTables != 0)
{
aodv.PrintRoutingTableAllAt (rtt, rtw);
}
list.Add (aodv, 100);
m_protocolName = “AODV”;
break;
case 3:
if (m_routingTables != 0)
{
dsdv.PrintRoutingTableAllAt (rtt, rtw);
}
list.Add (dsdv, 100);
m_protocolName = “DSDV”;
break;
case 4:
m_protocolName = “DSR”;
break;
default:
NS_FATAL_ERROR (“No such protocol:” << m_protocol);
break;
}
if (m_protocol < 4)
{
internet.SetRoutingHelper (list);
internet.Install (c);
}
else if (m_protocol == 4)
{
internet.Install (c);
dsrMain.Install (dsr, c);
}
if (m_log != 0)
{
NS_LOG_UNCOND (“Routing Setup for ” << m_protocolName);
}
}