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How to Implement Wireless Mesh Topology in ns3

To implement the wireless mesh topology in ns3, we need to generate the network where each node can interact with its neighbours to developing the mesh of interconnected nodes. The give below are the steps to setup the mesh topology in ns3:

Step-by-Step Implementation

Step 1: Install ns3

  • Make sure ns3 is installed in the computer.

Step 2: Create a New Simulation Script

  • Create a new C++ script for your simulation.

Step 3: Include Necessary Headers

  • In your script, include the necessary ns3 headers:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/mobility-module.h”

#include “ns3/mesh-module.h”

#include “ns3/applications-module.h”

Step 4: Set Up the Wireless Mesh Topology

This is the sample to set up the wireless mesh topology in ns3:

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“WirelessMeshTopology”);

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

{

// Configure command line parameters

CommandLine cmd;

cmd.Parse (argc, argv);

// Create nodes

NodeContainer meshNodes;

meshNodes.Create (9); // Create 9 nodes

// Configure mobility model

MobilityHelper mobility;

mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,

“MinX”, DoubleValue (0.0),

“MinY”, DoubleValue (0.0),

“DeltaX”, DoubleValue (50.0),

“DeltaY”, DoubleValue (50.0),

“GridWidth”, UintegerValue (3),

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

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

mobility.Install (meshNodes);

// Configure the mesh helper

MeshHelper mesh;

mesh.SetStackInstaller (“ns3::Dot11sStack”);

mesh.SetSpreadInterfaceChannels (MeshHelper::SPREAD_CHANNELS);

mesh.SetMacType (“RandomStart”, TimeValue (Seconds (0.1)));

mesh.SetNumberOfInterfaces (1);

// Install the mesh devices

NetDeviceContainer meshDevices = mesh.Install (wifiPhy, meshNodes);

// Install the internet stack

InternetStackHelper internet;

internet.Install (meshNodes);

// Assign IP addresses

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (meshDevices);

// Set up applications (e.g., UDP echo server and client)

uint16_t port = 9; // Port number for applications

// Install UDP Echo Server on node 0

UdpEchoServerHelper echoServer (port);

ApplicationContainer serverApps = echoServer.Install (meshNodes.Get (0));

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

// Install UDP Echo Client on node 8 to communicate with node 0

UdpEchoClientHelper echoClient (interfaces.GetAddress (0), port);

echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));

echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));

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

ApplicationContainer clientApps = echoClient.Install (meshNodes.Get (8));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

// Run simulation

Simulator::Stop (Seconds (10.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Step 5: Build and Run the Simulation

  1. Save the script as wireless-mesh-topology.cc.
  2. Build the script using waf:

./waf configure –enable-examples

./waf build

  1. Run the simulation:

./waf –run scratch/wireless-mesh-topology

Explanation of the Script

  • Node Creation: Creates nine nodes for the mesh network.
  • Mobility Model: Sets the position of nodes in a grid layout using GridPositionAllocator and ConstantPositionMobilityModel.
  • Mesh Configuration: Configures the mesh helper to install the mesh stack, spread interface channels, set MAC type, and specify the number of interfaces.
  • Internet Stack: Installs the internet stack on all nodes.
  • IP Addressing: Assigns IP addresses to the mesh devices.
  • Applications: Sets up a UDP echo server on node 0 and a UDP echo client on node 8 to demonstrate communication between nodes.

In the end, we learned and understand how the Wireless Mesh Topology will estimate in the ns3 framework. We will give further insights regarding to Wireless Mesh Topology for your project, how it works in diverse simulation tools.

Even after reading it if you find hard in Implementing Wireless Mesh Topology in ns3 then reach us out at ns3simulation.com our developers will give you good outcome we also carry out networking performance so share with us all your parameter details and get a productive result with us.