How to Implement Software defined WSN in ns3

To Implement a Software-Defined Wireless Sensor Network (SD-WSN) in ns-3 by setting up a network with centralized controller which manages the sensor nodes and can dynamically reconfigure the network based on the current state and requirements. SD-WSN simulation are done as per your ideas by our team. Given below steps guide to set up a basic SD-WSN simulation in ns-3.

Step-by-Step Guide to Implement Software-Defined WSN in ns-3

1. Set Up Your Development Environment

1. Install ns-3:
   • Follow the official ns-3 installation guide.
2. Install Required Modules:
   • Ensure you have all necessary ns-3 modules installed, such as WiFi, Mobility, and Internet modules.

2. Create a Basic Software-Defined WSN Simulation Script

Here’s an example script to set up a basic Software-Defined WSN scenario using ns-3:

#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-helper.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE(“SoftwareDefinedWSN”);

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

{

  // Set simulation parameters

  uint32_t numSensors = 5;

  double simTime = 20.0; // Simulation time in seconds

  CommandLine cmd;

  cmd.AddValue(“numSensors”, “Number of sensor nodes”, numSensors);

  cmd.AddValue(“simTime”, “Simulation time”, simTime);

  cmd.Parse(argc, argv);

  // Create sensor nodes

  NodeContainer sensorNodes;

  sensorNodes.Create(numSensors);

  // Create a controller node

  NodeContainer controllerNode;

  controllerNode.Create(1);

  // Configure WiFi for sensor communication

  WifiHelper wifi;

  wifi.SetStandard(WIFI_PHY_STANDARD_80211n_5GHZ);

  YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

  YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

  wifiPhy.SetChannel(wifiChannel.Create());

  WifiMacHelper wifiMac;

  wifiMac.SetType(“ns3::AdhocWifiMac”);

  NetDeviceContainer sensorDevices;

  sensorDevices = wifi.Install(wifiPhy, wifiMac, sensorNodes);

  NetDeviceContainer controllerDevice;

  controllerDevice = wifi.Install(wifiPhy, wifiMac, controllerNode);

  // Install the Internet stack on sensor nodes and controller node

  InternetStackHelper internet;

  internet.Install(sensorNodes);

  internet.Install(controllerNode);

  // Assign IP addresses to devices

  Ipv4AddressHelper ipv4;

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

  Ipv4InterfaceContainer sensorInterfaces;

  sensorInterfaces = ipv4.Assign(sensorDevices);

  Ipv4InterfaceContainer controllerInterface;

  controllerInterface = ipv4.Assign(controllerDevice);

  // Set up mobility

  MobilityHelper mobility;

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

  mobility.Install(sensorNodes);

  mobility.Install(controllerNode);

  // Example application: UDP echo server on controller

  uint16_t port = 9;

  UdpEchoServerHelper echoServer(port);

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

  serverApps.Start(Seconds(1.0));

  serverApps.Stop(Seconds(simTime));

  // Example application: UDP echo client on sensor nodes

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

  echoClient.SetAttribute(“MaxPackets”, UintegerValue(320));

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

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

  ApplicationContainer clientApps;

  for (uint32_t i = 0; i < numSensors; ++i)

  {

    clientApps.Add(echoClient.Install(sensorNodes.Get(i)));

  }

  clientApps.Start(Seconds(2.0));

  clientApps.Stop(Seconds(simTime));

  // Enable Flow Monitor

  FlowMonitorHelper flowmon;

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

  // Run the simulation

  Simulator::Stop(Seconds(simTime));

  Simulator::Run();

  // Print Flow Monitor statistics

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

  Simulator::Destroy();

  return 0;

}

Explanation of the Script

Below we have enlightened the process of setting up SD-WAN in ns-3:

1. Include Necessary Headers:
   • Include headers for ns-3 core, network, internet, WiFi, mobility, applications, and flow monitor modules.
2. Set Simulation Parameters:
   • Define the number of sensor nodes and simulation time.
3. Create Nodes:
   • Create sensor nodes and a controller node (centralized manager).
4. Configure WiFi for Sensor Communication:
   • Set up WiFi using WifiHelper, YansWifiPhyHelper, and WifiMacHelper for ad-hoc communication.
5. Install Internet Stack:
   • Install the Internet stack on sensor nodes and the controller node using InternetStackHelper.
6. Assign IP Addresses:
   • Assign IP addresses to the devices using Ipv4AddressHelper.
7. Set Up Mobility:
   • Define the positions and mobility models for the nodes using MobilityHelper.
8. Install Applications:
   • Install a UDP echo server on the controller node and UDP echo clients on the sensor nodes to simulate communication.
9. Enable Flow Monitor:
   • Install and configure the Flow Monitor to collect and analyze network performance statistics.
10. Run the Simulation:
    • Set the simulation stop time, run the simulation, print Flow Monitor statistics, and clean up using Simulator::Stop, Simulator::Run, and Simulator::Destroy.

Further Enhancements

1. Dynamic Network Configuration:
   • Implement a control application on the controller node to dynamically reconfigure the network based on sensor data and network conditions.
2. Advanced Mobility Models:
   • Implement more realistic mobility models for sensor nodes.
3. Quality of Service (QoS):
   • Implement QoS mechanisms to prioritize critical sensor data.
4. Routing Protocols:
   • Implement and assess different routing protocols for SD-WSNs.
5. Network Performance Metrics:
   • Collect and analyze performance metrics such as throughput, latency, packet delivery ratio, and energy consumption.
6. Fault Tolerance and Resilience:
   • Implement and estimate fault tolerance mechanisms and resilience strategies for sensor communication.

      Atlast, we all get to know how to implement Software-Defined Wireless Sensor Network (SD-WSN) in ns-3. Should you encounter challenges with programming Software-Defined Wireless Sensor Network (SD-WSN) in ns-3, do not hesitate to contact us for assistance.