How to Start Optical Communication Projects Using NS2

To create an Optical Communication project in NS2 has includes the modifying the replicator to design the optical networks, it contains the features such as high-speed data transmission, wavelength division multiplexing (WDM), and fibre optics. NS2 does not natively help for the optical communication, so extensions or modifications to the replicator are necessary.

Here’s a step-by-step guide to get started with optical communication projects using NS2:

Steps to Start Optical Communication Projects Using NS2

  1. Understand Optical Communication Basics

The Optical communication has includes the transmitting information using light through optical fibers. Main features are include:

  • Techniques: WDM, Dense Wavelength Division Multiplexing (DWDM), optical amplifiers.
  • Components:
    • Optical transmitter and receiver.
    • Fiber links.
    • Optical switches and routers.
  • Applications: It contains the high-speed internet, backbone networks, and data centers.
  1. Install NS2
  1. Download NS2 from the official website.
  2. Install NS2 on a Linux-based system for compatibility.
  3. Validate the installation through processing the sample scripts.
  1. Define Project Scope

Explain the concentrate the optical communication project:

  • Wavelength Allocation: Replicate the wavelength allocation for WDM or DWDM.
  • Routing: The Optical routing and wavelength assignment (RWA).
  • Performance Metrics: It involves the parameter metrices such as Throughput, delay, BER (Bit Error Rate).
  1. Add Optical Communication Support
  2. Search for Optical Network Extensions
  • Use extensions like:
    • NS2 Optical Extensions: Accessible the GitHub or research repositories.
    • OWN (Optical WDM Network): An NS2 module for WDM replication.
  1. Customize NS2

If extensions are unavailable:

  1. Define Optical Links:
    • Encompass the NS2’s Link class to signify optical fibre connection.
    • It Contain the properties such as wavelength capacity and attenuation.
  2. Model WDM:
    • Apply the wavelength-based packet forwarding.
    • Increase the model for multiplexing and demultiplexing logic.
  3. Modify the MAC Layer:
    • Encompass the Mac/802_11 module for optical transmission.
  1. Write TCL Script

Create a TCL script to simulate the optical communication network.

Step 1: Define Simulation Parameters

set ns [new Simulator]

# Define simulation parameters

set val(chan)   Channel/WirelessChannel  ;# Use as base

set val(prop)   Propagation/FreeSpace    ;# Use free-space propagation for simplicity

set val(ll)     LL

set val(mac)    Mac/802_11               ;# Custom MAC for optical

set val(ifq)    Queue/DropTail/PriQueue

set val(ant)    Antenna/OmniAntenna      ;# Antenna for optical (customize for fiber links)

set val(x)      1000                     ;# X-dimension of topology

set val(y)      1000                     ;# Y-dimension of topology

Step 2: Create Nodes

State the nodes for the optical network:

# Create optical nodes

set node_0 [$ns node]

$node_0 set X_ 50

$node_0 set Y_ 50

set node_1 [$ns node]

$node_1 set X_ 950

$node_1 set Y_ 50

Step 3: Configure Links

Replicate the optical fiber connection:

# Add optical link between nodes

$ns duplex-link $node_0 $node_1 10Gb 10ms DropTail

Step 4: Add Traffic

Replicate the optical data transmission:

# Attach TCP agent for data transmission

set tcp [new Agent/TCP]

$ns attach-agent $node_0 $tcp

 

set sink [new Agent/TCPSink]

$ns attach-agent $node_1 $sink

# Connect agents

$ns connect $tcp $sink

# Add FTP traffic over TCP

set ftp [new Application/FTP]

$ftp attach-agent $tcp

$ns at 1.0 “$ftp start”

  1. Run the Simulation

Store the script for sample optical_comm.tcl and implementation:

ns optical_comm.tcl

  1. Analyze Results
  1. Trace File:
    • Extract the parameter metrics such as throughput, delay, and packet loss from the trace file.
  2. Visualization:
    • Use the envision for NAM (Network Animator) to demonstrate the optical network:

nam output.nam

  1. Graphical Analysis:
    • Mark the outcomes using tools such as Xgraph or MATLAB.
  1. Extend the Simulation
  2. Implement WDM or DWDM
  1. Define Wavelengths:
    • Allocate the unique wavelengths to various congestion streams.
  2. Routing and Wavelength Assignment (RWA):
    • Apply the procedures to permits the wavelengths and routes dynamically.
  1. Model BER (Bit Error Rate)
  1. Replicate the model for optical noise and interference.
  2. Measure the BER according to the signal quality and distance.
  1. Add Optical Switches and Amplifiers
  1. Encompass the nodes to perform as an optical routers or amplifiers.
  2. It contains the gain and attenuation factors.
  1. Example Applications
  1. WDM Network Simulation:
    • Estimate the performance of various wavelength allocation schemes.
  2. RWA Algorithms:
    • Apply and associate the methods for optical routing and wavelength assignment.
  3. Performance Metrics:
    • Examine the effect for connection attenuation and noise on throughput and BER.
  1. Consider Alternative Tools

If NS2 does not meet your requirements:

  • NS3: Improve the modern help for the optical network replications.
  • OMNeT++: Stable and modular for optical communication modeling in the OMNeT++.
  • MATLAB: The MATLAB tool useful for physical layer and signal-level optical replication.

Through this approach, we offered the overall information regarding the implementation of Network Optical Communication using ns2 tool. If needed, we can offer extra details of these attacks and their functions.