How to Start Wireless Mesh Topology Projects using NS3

To Stimulate the Wireless Mesh Topology has involved the interconnected wireless nodes in which every node has act as together a host and router. This topology is generally used in ad hoc networks, IoT, and community wireless networks. We give the brief procedures for below method based on the topology.

Steps to Start Wireless Mesh Topology Projects using NS3

Step 1: Set Up NS-3

  1. Install NS-3:
    • Download NS-3.
    • Follow the installation process.
  2. Verify Installation: Processing a basic script to ensure NS-3 is correctly set up:

./waf –run scratch/my_first

Step 2: Understand Wireless Mesh Topology

  • Wireless Mesh Topology:
    • Every node has communicated the directly through neighbouring nodes.
    • The Nodes form a multi-hop wireless network topology in deprived of relying the centralized infrastructure.
    • Normal used in cases has involves the community networks, disaster recovery, and sensor networks.

Step 3: Plan the Topology

  1. Decide the number of nodes and layout:
    • For example, a 3×3 grid of wireless nodes.
  2. Choose a wireless standard:
    • Used a wireless standard in Wi-Fi (802.11) or another wireless protocol.
  3. Set simulation goals:
    • We calculate the simulation goals in throughput, latency, packet delivery ratio, or network connectivity.

Step 4: Set Up the Wireless Mesh Topology

  1. Create Nodes: state the wireless nodes for the mesh network topology .

NodeContainer meshNodes;

uint32_t numNodes = 9; // 3×3 grid

meshNodes.Create(numNodes);

  1. Set Up Wi-Fi Devices: Used in devices for WifiHelper and we setting the wireless devices.

WifiHelper wifi;

wifi.SetStandard(WIFI_PHY_STANDARD_80211g);

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.Set(“TxPowerStart”, DoubleValue(16.0));

phy.Set(“TxPowerEnd”, DoubleValue(16.0));

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

phy.SetChannel(channel.Create());

WifiMacHelper mac;

mac.SetType(“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install(phy, mac, meshNodes);

  1. Set Up Mobility: Dwelling the mobility nodes in a grid layout we replicate the mesh topology.

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);

  1. Install Internet Stack: Improve the Internet stack we ensure the routing stack.

InternetStackHelper stack;

stack.Install(meshNodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

  1. Configure Routing: Utilized through a set up in reactive or proactive routing protocol such as AODV, OLSR.

AodvHelper aodv;

Ipv4ListRoutingHelper list;

list.Add(aodv, 10);

stack.SetRoutingHelper(list);

stack.Install(meshNodes);

Step 5: Set Up Applications

  1. Install Traffic Generators: Replicate the traffic generators in communication among nodes.
    • UDP Echo Example:

UdpEchoServerHelper echoServer(9); // Port 9

ApplicationContainer serverApp = echoServer.Install(meshNodes.Get(8)); // Server on the last node

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

UdpEchoClientHelper echoClient(Ipv4Address(“10.1.1.9”), 9); // Server’s IP

echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));

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

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

ApplicationContainer clientApp = echoClient.Install(meshNodes.Get(0)); // Client on the first node

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

  1. Configure Flow Monitoring: Utilized their setting of FlowMonitorHelper we follow the performance metrics.

FlowMonitorHelper flowmon;

Ptr<FlowMonitor> monitor = flowmon.InstallAll();

Step 6: Run and Analyze

  1. Run the Simulation:

Simulator::Run();

Simulator::Destroy();

  1. Enable Packet Capture: Save .pcap files for traffic analysis.

phy.EnablePcapAll(“wireless_mesh_topology”);

  1. Analyze Results: Utilized their process of results in flow monitor or log outputs and we analyse the network performance.

monitor->SerializeToXmlFile(“mesh-flowmon.xml”, true, true);

Example: Minimal NS-3 Script for Wireless Mesh Topology

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/wifi-module.h”

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

#include “ns3/flow-monitor-module.h”

using namespace ns3;

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

uint32_t numNodes = 9;

// Create nodes

NodeContainer meshNodes;

meshNodes.Create(numNodes);

// Configure Wi-Fi

WifiHelper wifi;

wifi.SetStandard(WIFI_PHY_STANDARD_80211g);

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.Set(“TxPowerStart”, DoubleValue(16.0));

phy.Set(“TxPowerEnd”, DoubleValue(16.0));

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

phy.SetChannel(channel.Create());

WifiMacHelper mac;

mac.SetType(“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install(phy, mac, meshNodes);

// Configure mobility

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);

// Install Internet stack

InternetStackHelper stack;

stack.Install(meshNodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Set up UDP echo server

UdpEchoServerHelper echoServer(9);

ApplicationContainer serverApp = echoServer.Install(meshNodes.Get(8));

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

// Set up UDP echo client

UdpEchoClientHelper echoClient(interfaces.GetAddress(8), 9);

echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));

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

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

ApplicationContainer clientApp = echoClient.Install(meshNodes.Get(0));

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

// Enable packet capture

phy.EnablePcapAll(“wireless_mesh_topology”);

// Run simulation

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 7: Compile and Run

  1. Save the script as wireless_mesh_topology.cc.
  2. We compile and run it:

./waf –run wireless_mesh_topology

Step 8: Enhance the Simulation

  • Dynamic Mobility:
    • Utilized a dynamic mobility design such as RandomWalk2D or GaussMarkov for changing the nodes.
  • Analyze Performance:
    • Utilized the performance of FlowMonitor we evaluate the parameter metrics such as throughput, delay, and jitter.
  • Test Routing Protocols:
    • Compared the test routing protocols performance for AODV, OLSR, or DSDV.
  • Visualize:
    • Utilized their visualize for NetAnim we display the node connectivity and congestion.

In this presented manual elaborately provide the comprehensive procedures to help you to simulate the Wireless Mesh Topology over the network using the tool of NS3.

Do you require additional information, we can supply a dedicated manual. Do not hesitate to contact us regarding your simulation and project performance outcomes. Please ensure that you include all pertinent details about your Wireless Mesh Topology Project in NS-3 when reaching out to phdprojects.org, and we assure you that we will strive to achieve optimal results. We specialize in ad hoc networks, IoT, and community wireless networks, and we are committed to guiding you on the right path until the completion of your project.