How to Implement Optical Communication in NS3

How to Implement Optical Communication in NS3

To implement optical communication in ns-3, create a network which uses optical signals to transmit the data. Ns-3 does not have a specific built-in module for optical communications like fiber optics. Hence, we need to simulate optical communication by using point-to-point links with high data rates and low propagation delays. By using this simulation, we implement the behaviour of optical communication systems.

Here are the steps to set up a basic optical communication simulation in ns-3 :

Prerequisites

• You should have a system with ns-3 installed in it.
• You should have a basic understanding of ns-3 and C++ programming language.

Steps to Implement Optical Communication in ns-3

Install ns-3: Make sure that you have ns-3 installed in your computer. You can download it from the official website and follow the installation instructions.

wget https://www.nsnam.org/release/ns-allinone-3.xx.tar.bz2

tar -xjf ns-allinone-3.xx.tar.bz2

cd ns-allinone-3.xx

./build.py –enable-examples –enable-tests

Include Necessary Headers: Include the headers for network modules, mobility, internet, and point-to-point links.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/applications-module.h”

Create Network Topology: Create nodes that represents the devices in the optical network.

NodeContainer nodes;

nodes.Create(2); // Create 2 nodes: sender and receiver

Set Up Point-to-Point Links: set point-to-point links to simulate optical communication. Note that you have to Set high data rates and low propagation delays.

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Gbps”));

pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));

NetDeviceContainer devices;

devices = pointToPoint.Install(nodes);

            Install Internet Stack: Install the internet stack on the nodes.

InternetStackHelper stack;

stack.Install(nodes);

Assign IP Addresses: Assign IP addresses to the devices.

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

Create Applications: Create and install applications to transmit the data between the nodes.

uint16_t port = 9;

OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(interfaces.GetAddress(1), port)));

onoff.SetConstantRate(DataRate(“1Gbps”));

ApplicationContainer app = onoff.Install(nodes.Get(0));

app.Start(Seconds(1.0));

app.Stop(Seconds(10.0));

PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), port)));

app = sink.Install(nodes.Get(1));

app.Start(Seconds(0.0));

app.Stop(Seconds(10.0));

Run the Simulation: Finally, you can set the simulation stopping time and start the simulator.

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

Example Complete Script

Here is an example complete script for setting up a basic optical communication simulation in ns-3:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/applications-module.h”

using namespace ns3;

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

{

    NodeContainer nodes;

    nodes.Create(2); // Create 2 nodes: sender and receiver

    PointToPointHelper pointToPoint;

    pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Gbps”));

    pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));

    NetDeviceContainer devices;

    devices = pointToPoint.Install(nodes);

    InternetStackHelper stack;

    stack.Install(nodes);

    Ipv4AddressHelper address;

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

    Ipv4InterfaceContainer interfaces = address.Assign(devices);

    uint16_t port = 9;

OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(interfaces.GetAddress(1), port)));

    onoff.SetConstantRate(DataRate(“1Gbps”));

    ApplicationContainer app = onoff.Install(nodes.Get(0));

    app.Start(Seconds(1.0));

    app.Stop(Seconds(10.0));

PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), port)));

    app = sink.Install(nodes.Get(1));

    app.Start(Seconds(0.0));

    app.Stop(Seconds(10.0));

    Simulator::Stop(Seconds(10.0));

    Simulator::Run();

    Simulator::Destroy();

    return 0;

}

Running the Script

Use the following commands to compile and run the script.

./waf configure –enable-examples

./waf build

./waf –run <script-name>

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