How to implement VANET protocols in OMNeT++
To Implement Vehicular Ad-Hoc Network (VANET) protocols in OMNeT++ have contains numerous steps. The VANET protocols like Ad hoc On-Demand Distance Vector (AODV), Geographical Routing Protocols, or the Intelligent Driver Model (IDM) has needs to consider the incorporation with both the OMNeT++ simulation environment and the INET framework for networking capabilities. The below are the detailed procedures on how to implement the VANET protocols in OMNeT++:
Step-by-Step Implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Download and install the latest version of OMNeT++ from the OMNeT++
- Install INET Framework: Download and install the INET framework from the INET repository.
- Install Veins Framework: Veins is a framework for vehicular network simulations in OMNeT++ and SUMO (Simulation of Urban MObility). Download and install Veins from the Veins website.
Step 2: Understand VANET Protocols
VANET protocols are planned for vehicular communication that contains vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication. They can be reactive (like AODV), proactive (like OLSR), or geographic (like GPSR).
Step 3: Create the VANET Protocol Module
Define the Module in .ned File
Create a .ned file for the VANET protocol module.
simple VANETProtocol
{
parameters:
double helloInterval @unit(s) = default(1s);
double beaconInterval @unit(s) = default(5s);
gates:
input fromNetworkLayer;
output toNetworkLayer;
input fromMacLayer;
output toMacLayer;
}
Implement the Module in C++
Generate the corresponding .cc and .h files.
VANETProtocol.h
#ifndef __VANETPROTOCOL_H_
#define __VANETPROTOCOL_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/common/L3AddressResolver.h”
#include “inet/networklayer/ipv4/IPv4Datagram.h”
#include <map>
using namespace omnetpp;
using namespace inet;
class VANETProtocol : public cSimpleModule
{
private:
double helloInterval;
double beaconInterval;
IRoutingTable *routingTable;
cMessage *helloMsg;
cMessage *beaconMsg;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void sendHello();
void processHello(cMessage *msg);
void sendBeacon();
void processBeacon(cMessage *msg);
public:
VANETProtocol();
virtual ~VANETProtocol();
};
#endif
VANETProtocol.cc
#include “VANETProtocol.h”
Define_Module(VANETProtocol);
VANETProtocol::VANETProtocol()
{
helloMsg = nullptr;
beaconMsg = nullptr;
}
VANETProtocol::~VANETProtocol()
{
cancelAndDelete(helloMsg);
cancelAndDelete(beaconMsg);
}
void VANETProtocol::initialize()
{
helloInterval = par(“helloInterval”);
beaconInterval = par(“beaconInterval”);
routingTable = getModuleFromPar<IRoutingTable>(par(“routingTableModule”), this);
helloMsg = new cMessage(“sendHello”);
beaconMsg = new cMessage(“sendBeacon”);
scheduleAt(simTime() + helloInterval, helloMsg);
scheduleAt(simTime() + beaconInterval, beaconMsg);
}
void VANETProtocol::handleMessage(cMessage *msg)
{
if (msg == helloMsg)
{
sendHello();
scheduleAt(simTime() + helloInterval, helloMsg);
}
else if (msg == beaconMsg)
{
sendBeacon();
scheduleAt(simTime() + beaconInterval, beaconMsg);
}
else if (strcmp(msg->getName(), “Hello”) == 0)
{
processHello(msg);
}
else if (strcmp(msg->getName(), “Beacon”) == 0)
{
processBeacon(msg);
}
else
{
// Handle other messages
}
}
void VANETProtocol::sendHello()
{
cMessage *hello = new cMessage(“Hello”);
send(hello, “toNetworkLayer”);
}
void VANETProtocol::processHello(cMessage *msg)
{
// Implement processing of Hello message
delete msg;
}
void VANETProtocol::sendBeacon()
{
cMessage *beacon = new cMessage(“Beacon”);
send(beacon, “toNetworkLayer”);
}
void VANETProtocol::processBeacon(cMessage *msg)
{
// Implement processing of Beacon message
delete msg;
}
Step 4: Integrate with Simulation Model
Incorporate the VANET protocol module into a network simulation model.
Network Configuration .ned File
network VANETNetwork
{
submodules:
car1: StandardHost {
parameters:
@display(“p=100,100”);
routingTableModule = “^.routingTable”;
}
car2: StandardHost {
parameters:
@display(“p=300,100”);
routingTableModule = “^.routingTable”;
}
// Add more cars as needed
connections:
car1.pppg++ <–> { @display(“m=100,100”); } <–> car2.pppg++;
}
omnetpp.ini Configuration
network = VANETNetwork
*.car*.pppg[*].queue.typename = “DropTailQueue”
*.car*.ipv4.routingTable = “inet.networklayer.routing.manet.Router”
*.car*.networkLayer.networkProtocol.typename = “IPv4NetworkLayer”
*.car*.transportLayer.tcp.typename = “Tcp”
*.car*.transportLayer.udp.typename = “Udp”
*.car*.application[*].typename = “UdpBasicApp”
*.car*.application[*].destAddresses = “car1” // Set destination as needed
*.car*.application[*].destPort = 2000
*.car*.application[*].startTime = uniform(0s, 10s)
*.car*.application[*].sendInterval = uniform(1s, 2s)
*.car*.application[*].packetLength = 512B
*.car*.app[0].typename = “VANETProtocol”
Step 5: Test and Debug
- Run Simulations: Execute simulations to validate the characteristics of VANET protocol module under several network conditions.
- Analyze Results: Validate the correctness and performance of implementation.
- Debugging: Use OMNeT++’s debugging tools to troubleshoot any issues.
In the above procedure were explored how the VANET protocols like AODV, IDM were executed and validate the outcomes in OMNeT++ tool and also if you any doubts regarding the VANET simulation we will provide it. We work on all VANET protocols like AODV, IDM concepts share with us the details to guide you more with implementation guidance.