How to implement ODMRP protocol in ns3

To implement the On-Demand Multicast Routing Protocol (ODMRP) in ns3 has various steps that have been given below, let’s get started. We work on comparative analysis so stay in touch with us for more guidance on On-Demand Multicast Routing Protocol.

Prerequisites

1. ns3 Installation: Make sure ns3 is installed. If, not then you can download it from ns3 official website.
2. Basic Understanding of ns-3: understand the basics of ns3 that contains modules, script and to build simulation script.
3. C++ Programming: Familiarity of C++ is important since ns-3 is primarily C++ based.

Steps to Implement ODMRP in ns-3

1. Set Up Your Development Environment

• Download the required tools and dependencies.
• Set up your ns-3 workspace.

2. Create ODMRP Module

• Navigate to the ns-3 directory and create a new directory for the ODMRP protocol inside the src folder.

cd ns-3.XX/src

mkdir odmrp

cd odmrp

• Create necessary subdirectories:

mkdir model

mkdir helper

mkdirtest

3. Define ODMRP Classes and Headers

• Implement the core functionality of ODMRP by creating the required classes and header files inside the model directory.
• For example, create odmrp.h and odmrp.cc.

odmrp.h

#ifndef ODMRP_H

#define ODMRP_H

#include “ns3/ipv4-routing-protocol.h”

#include “ns3/ipv4-address.h”

#include “ns3/timer.h”

namespace ns3 {

class Odrmp : public Ipv4RoutingProtocol {

public:

static TypeId GetTypeId (void);

Odrmp ();

virtual ~Odrmp ();

virtual void DoDispose (void);

// Implement virtual functions from Ipv4RoutingProtocol here

private:

// Define internal states and methods

};

} // namespace ns3

#endif // ODMRP_H

odmrp.cc

#include “odmrp.h”

#include “ns3/log.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“Odrmp”);

NS_OBJECT_ENSURE_REGISTERED (Odrmp);

TypeId Odrmp::GetTypeId (void) {

static TypeId tid = TypeId (“ns3::Odrmp”)

.SetParent<Ipv4RoutingProtocol> ()

.SetGroupName (“Internet”)

.AddConstructor<Odrmp> ();

return tid;

}

Odrmp::Odrmp () {

// Constructor implementation

}

Odrmp::~Odrmp () {

// Destructor implementation

}

void Odrmp::DoDispose (void) {

// Dispose implementation

}

} // namespace ns3

4. Implement ODMRP Helper

• Create a helper class to facilitate the use of the ODMRP protocol in simulations.

odmrp-helper.h

#ifndef ODMRP_HELPER_H

#define ODMRP_HELPER_H

#include “ns3/odmrp.h”

#include “ns3/node-container.h”

#include “ns3/ipv4-routing-helper.h”

namespace ns3 {

class OdrmpHelper : public Ipv4RoutingHelper {

public:

OdrmpHelper ();

OdrmpHelper* Copy (void) const;

virtual Ptr<Ipv4RoutingProtocol> Create (Ptr<Node> node) const;

 

private:

// Define internal states and methods

};

} // namespace ns3

#endif // ODMRP_HELPER_H

odmrp-helper.cc

#include “odmrp-helper.h”

#include “ns3/odmrp.h”

#include “ns3/node.h”

#include “ns3/log.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“OdrmpHelper”);

OdrmpHelper::OdrmpHelper () {

// Constructor implementation

}

OdrmpHelper* OdrmpHelper::Copy (void) const {

return new OdrmpHelper (*this);

}

Ptr<Ipv4RoutingProtocol> OdrmpHelper::Create (Ptr<Node> node) const {

Ptr<Odrmp> agent = CreateObject<Odrmp> ();

node->AggregateObject (agent);

return agent;

}

} // namespace ns3

5. Integrate ODMRP with ns-3

• Register the ODMRP module with ns-3 by modifying the wscript in the src directory.
• Add the odmrp module to the src/wscript.

src/wscript

def build(bld):

…

obj = bld.create_ns3_module(‘odmrp’, [‘core’, ‘network’, ‘internet’])

obj.source = [

‘model/odmrp.cc’,

‘helper/odmrp-helper.cc’,

]

headers = bld(features=’ns3header’)

headers.module = ‘odmrp’

headers.source = [

‘model/odmrp.h’,

‘helper/odmrp-helper.h’,

]

…

6. Build the ODMRP Module

• Build ns-3 with the new ODMRP module.

./waf configure

./waf build

7. Create a Simulation Script

• Use the ODMRP helper in your simulation script to set up a network using ODMRP.

odmrp-simulation.cc

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/odmrp-helper.h”

#include “ns3/mobility-module.h”

using namespace ns3;

int main (int argc, char *argv[]) {

CommandLine cmd;

cmd.Parse (argc, argv);

NodeContainer nodes;

nodes.Create (10);

MobilityHelper mobility;

mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,

“MinX”, DoubleValue (0.0),

“MinY”, DoubleValue (0.0),

“DeltaX”, DoubleValue (5.0),

“DeltaY”, DoubleValue (10.0),

“GridWidth”, UintegerValue (5),

“LayoutType”, StringValue (“RowFirst”));

mobility.SetMobilityModel (“ns3::RandomWalk2dMobilityModel”,

“Bounds”, RectangleValue (Rectangle (-50, 50, -50, 50)));

mobility.Install (nodes);

OdrmpHelper odmrp;

InternetStackHelper stack;

stack.SetRoutingHelper (odmrp); // has effect on the next Install

stack.Install (nodes);

Ipv4AddressHelper address;

address.SetBase (“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign (devices);

// Simulation details

Simulator::Stop (Seconds (100.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

8. Run the Simulation

• Compile and run the simulation script.

./waf build

./waf –run odmrp-simulation

Here we discussed about how to implement the ODMRP in ns3 tool. We also provide the related information for ODMRP based on your project type with programming results.