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How to Implement LiFi in OMNeT++

To implement the Lifi (Light Fidelity) in OMNeT++, we have to set up the essential frameworks, designing the network architecture, developing simulation modules, and configuring and running the simulation. Below is a step-by-step guide to help you get started:

Step-by-Step Implementation:

  1. Set Up OMNeT++
  1. Install OMNeT++:
    • Make certain that you have to install the OMNeT++.
    • We have to install the suitable version based on the operating system.
  2. Install INET Framework:
    • Install the INET framework, which provides models for network protocols and devices.
    • Inside the OMNeT++ workspace, unzip the INET framework.
    • Open OMNeT++ IDE, import the INET project, and build it.
  1. Design the LiFi Network Architecture
  1. Define the Network Structure:
    • Defining the components of LiFi network like LiFi Access Points (APs) and LiFi-enabled devices.
    • Among these components, determine the communication protocols and data flow.
  2. Create the Network Nodes:
    • Extend existing INET nodes or create new ones for specific components (example: LiFi APs, LiFi devices).
    • Define the parameters and characteristics of these nodes (like optical transmitter and receiver characteristics).
  1. Develop the Simulation Modules
  1. LiFi Access Point Module:
    • Create a new module or expand an existing one for LiFi APs.
    • Execute functionalities like data transmission, modulation, and handling multiple devices.
  2. LiFi Device Module:
    • Signifying the LiFi-enabled devices by defining a module.
    • Implement features like data reception, demodulation, and communication with the AP.
  1. Implement Communication Protocols
  1. Define Communication Interfaces:
    • Amongst the LiFi APs and devices, we have to determine the interfaces for communication.
    • Execute data exchange mechanisms using INET’s message-passing system.
  2. Simulate Network Traffic:
    • Amongst the LiFi APs and devices, we have to simulate data transmission and reception by generating traffic generators.
    • Implement algorithms for modulation, demodulation, and error correction.
  1. Implement LiFi-Specific Features
  1. Optical Channel Model:
    • Simulate the actions of light-based communication by building an optical channel model.
    • Contemplate factors like line-of-sight (LOS) and non-line-of-sight (NLOS) conditions, reflection, and ambient light interference.
  2. Modulation and Demodulation:
    • Implement modulation schemes appropriate for LiFi (for instance: On-Off Keying, Pulse-Position Modulation).
    • Develop corresponding demodulation algorithms for the receiving devices.
  3. Interference and Noise Handling:
    • Implement algorithms to handle optical interference and noise in the communication channel.
  1. Configure the Simulation
  1. Network Configuration File (NED):
    • Write NED files to define the network topology and configuration.
    • Specify the types and relations of nodes in the network.
  2. Simulation Configuration File (INI):
    • Create INI files to specify simulation parameters like simulation time, node properties, data generation rates, and logging options.
    • Configure various situations to evaluate the performance of LiFi network implementation.
  1. Run and Analyze the Simulation
  1. Run the Simulation:
    • Use the OMNeT++ IDE to compile and run the simulation.
    • Monitor the simulation for any errors or unexpected behavior.
  2. Collect and Analyze Results:
    • Use OMNeT++’s in-built analysis tools to aggregate simulation data
    • Analyze metrics includes data rate, latency, packet loss, and signal-to-noise ratio to evaluate the performance of your LiFi network implementation.

Example Code Snippets

Here are some example snippets to give you an idea of what the configuration files might look like:

NED File (LiFiNetwork.ned)

package lifi;

import inet.node.inet.Router;

import inet.node.inet.StandardHost;

import inet.node.ethernet.EtherSwitch;

network LiFiNetwork {

submodules:

lifiAp[5]: StandardHost {

@display(“p=100,100;i=device/accesspoint”);

}

lifiDevice[20]: StandardHost {

@display(“p=200,200;i=device/laptop”);

}

connections:

for i=0..19 {

lifiDevice[i].ethg++ <–> lifiAp[i % 5].ethg++;

}

}

INI File (omnetpp.ini)

[General]

network = lifi.LiFiNetwork

sim-time-limit = 1000s

*.lifiAp*.wlan[0].typename = “IdealWirelessNic”

*.lifiAp*.numApps = 1

*.lifiAp*.app[0].typename = “UdpBasicApp”

*.lifiAp*.app[0].destAddresses = “lifiDevice[*]”

*.lifiAp*.app[0].destPort = 5000

*.lifiAp*.app[0].messageLength = 1000B

*.lifiAp*.app[0].sendInterval = exponential(1s)

*.lifiDevice*.wlan[0].typename = “IdealWirelessNic”

*.lifiDevice*.numApps = 1

*.lifiDevice*.app[0].typename = “UdpSink”

*.lifiDevice*.app[0].localPort = 5000

In conclusion, we learned the overall detail that is a must to understand the Lifi and their implementation, frameworks extension in the OMNeT++. We will provide the extra information of Lifi or OMNeT++ in case you need them. We provide full support for implementing LiFi in OMNeT++, focusing on framework development, network architecture design, and the creation of simulation modules.

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