How to Begin Implementing a LiFi Projects Using NS3

To create a LiFi (Light Fidelity) project using NS-3tool has includes the data communication replicate a using visible light. LiFi is an emerging wireless communication method for according to optical wireless communication (OWC) and uses visible light to transmit data.

Here’s a step-by-step guide to help you begin implementing a LiFi project in NS-3:

Steps to Begin Implementing a LiFi Projects Using NS3

1. Understand LiFi and Its Implementation

LiFi projects contain:

• Light Sources: The LEDs performs the transmitters.
• Receivers: It has a Photo-detector or light sensors receive data.
• Modulation Techniques: Methods such as On-Off Keying (OOK) or Orthogonal Frequency Division Multiplexing (OFDM).
• Key Features: it includes the main features of Line-of-sight (LoS) communication, high bandwidth, and low interference.

2. Define the Project Objectives

• For replicate the simple functionality in LiFi communication.
• It examines the performance metrics like as throughput, latency, and packet delivery ratio.
• Apply the advanced characteristics such as interference management or mobility support.

3. NS-3 Modules for LiFi

NS-3 does not have a dedicated LiFi module, nevertheless we can:

1. Use or extend the Spectrum module to represent LiFi communication.
2. Incorporate the Optical Communication Library (OCL) or other custom models for improve the communication.

4. Install and Set Up NS-3

• Download NS-3: NS-3 Official Website
• Explore the Spectrum Framework: The tool NS-3 contains the spectrum component can be used for design the visible light communication.

5. Design the LiFi System

Key Components:

1. LiFi Transmitter:
   • LED light sources for forwarding the data.
2. LiFi Receiver:
   • The receiver is photo-detectors and seizure the light signals.
3. Channel:
   • Optical communication channel by element such as light intensity and line-of-sight.
4. Communication Nodes:
   • Data congestion by source and destination nodes.

6. Develop the Simulation Code

Step A: Create Nodes

Generate nodes for demonstrate the LiFi transmitters and receivers.

NodeContainer lifiNodes;

lifiNodes.Create(2); // 1 transmitter, 1 receiver

Step B: Configure the LiFi Channel

1. Optical Communication Channel:
   • Use the tool SpectrumChannel for replicate the optical channel.
   • State the spectrum elements for visible light such as wavelength.

Ptr<SpectrumChannel> lifiChannel = CreateObject<MultiModelSpectrumChannel>();

SpectrumModelHelper spectrumHelper;

Ptr<SpectrumModel> spectrumModel = spectrumHelper.CreateSpectrumModel({400e-9, 750e-9}); // Visible light range

1. Configure Devices:
   • Describe the transmitter and receiver features such as LED properties.

Step C: Install Internet Stack

Install the Internet stack for assure the communication.

InternetStackHelper internet;

internet.Install(lifiNodes);

Step D: Assign IP Addresses

It allocates the IP addresses for the nodes.

Ipv4AddressHelper ipv4;

ipv4.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = ipv4.Assign(lifiDevices);

Step E: Implement Traffic Applications

1. Traffic Generation:
   • Use the tool like OnOffApplication for replicate the LiFi data congestion.

OnOffHelper onOff(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address(“10.1.1.2”), 9));

onOff.SetAttribute(“DataRate”, StringValue(“1Gbps”));

onOff.SetAttribute(“PacketSize”, UintegerValue(1024));

ApplicationContainer app = onOff.Install(lifiNodes.Get(0));

app.Start(Seconds(1.0));

app.Stop(Seconds(10.0));

1. Receiver Application:
   • It use receive and amount of data for the receiver such as PacketSink.

PacketSinkHelper packetSink(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), 9));

ApplicationContainer sinkApp = packetSink.Install(lifiNodes.Get(1));

sinkApp.Start(Seconds(1.0));

sinkApp.Stop(Seconds(10.0));

7. Configure Simulation Parameters

We configure the duration of replication and process for the replication.

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

8. Add Advanced Features

1. Modulation Techniques:
   • Execute the methods for OOK or OFDM in data transmission.
2. Interference Management:
   • The management replicates the interference caused through ambient light or overlapping LiFi cells.
3. Mobility:
   • Increase the mobility designs for placed in the dynamic transmitter and receiver.
4. Network Integration:
   • It associates the LiFi by other methods such as WiFi for hybrid networks.

9. Evaluate Performance

• Metrics:
  • It calculates the performance of metrices such as throughput, latency, packet delivery ratio, and spectral effectiveness.
• Visualization:
  • Use tools like NetAnim or transfer the metrices for envision the Python or MATLAB.

Sample Code Framework

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/spectrum-module.h”

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

using namespace ns3;

int main() {

// Create Nodes

NodeContainer lifiNodes;

lifiNodes.Create(2); // Transmitter and Receiver

// Create LiFi Channel

Ptr<SpectrumChannel> lifiChannel = CreateObject<MultiModelSpectrumChannel>();

// Define Spectrum Model

SpectrumModelHelper spectrumHelper;

Ptr<SpectrumModel> spectrumModel = spectrumHelper.CreateSpectrumModel({400e-9, 750e-9}); // Visible light range

// Internet Stack

InternetStackHelper internet;

internet.Install(lifiNodes);

// Mobility Model

MobilityHelper mobility;

mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);

mobility.Install(lifiNodes);

// Applications

OnOffHelper onOff(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address(“10.1.1.2”), 9));

onOff.SetAttribute(“DataRate”, StringValue(“1Gbps”));

onOff.SetAttribute(“PacketSize”, UintegerValue(1024));

ApplicationContainer app = onOff.Install(lifiNodes.Get(0));

app.Start(Seconds(1.0));

app.Stop(Seconds(10.0));

PacketSinkHelper packetSink(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), 9));

ApplicationContainer sinkApp = packetSink.Install(lifiNodes.Get(1));

sinkApp.Start(Seconds(1.0));

sinkApp.Stop(Seconds(10.0));

// Run Simulation

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

In this manual, we explore the complete guide on get started the Light Fidelity in ns3 analysis tool and it is used for communication over the network. We also provide the key characteristics and the sample code snippets to execute the simulation. Should there be more queries we can address another document.