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How to Implement Network VSN in ns3

To implement the Vehicular Sensor Network (VSN) in ns3 has to follow the steps to generate the simulation scenarios for the vehicles models as nodes that were equipped with sensors and communication capabilities and we use the nodes to interact with one another like roadside units, RSUs.

Here, we offer the detailed procedure on how to implement the network VSN in ns3:

Step-by-Step Implementation:

Step 1: Setup ns3 Environment

Make certain ns3 is installed in the system and checks it configured properly.

git clone https://gitlab.com/nsnam/ns-3-dev.git

cd ns-3-dev

./waf configure

./waf build

Step 2: Understand ns3 Structure

The structure of ns3 delivers the modules for numerous kinds of networks that contain WiFi and LTE, which can be used for vehicular communication. Additionally, the Mobility module is essential for simulating the movement of vehicles.

Step 3: Create Mobility Model for Vehicles

To simulate VSN, we need to define the mobility model for vehicles.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/mobility-module.h”

#include “ns3/wave-module.h”

#include “ns3/netanim-module.h”

using namespace ns3;

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

{

CommandLine cmd;

cmd.Parse(argc, argv);

// Create nodes for vehicles and RSUs

NodeContainer vehicles;

vehicles.Create(10);

NodeContainer rsu;

rsu.Create(1);

// Install Mobility Model

MobilityHelper mobility;

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

mobility.Install(vehicles);

Ptr<ConstantVelocityMobilityModel> mob = vehicles.Get(0)->GetObject<ConstantVelocityMobilityModel>();

mob->SetPosition(Vector(0.0, 0.0, 0.0));

mob->SetVelocity(Vector(20.0, 0.0, 0.0));

for (uint32_t i = 1; i < vehicles.GetN(); ++i)

{

Ptr<ConstantVelocityMobilityModel> mob = vehicles.Get(i)->GetObject<ConstantVelocityMobilityModel>();

mob->SetPosition(Vector(0.0, i * 10.0, 0.0));

mob->SetVelocity(Vector(20.0, 0.0, 0.0));

}

// Set RSU position

MobilityHelper rsuMobility;

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

rsuMobility.Install(rsu);

Ptr<ConstantPositionMobilityModel> rsuMob = rsu.Get(0)->GetObject<ConstantPositionMobilityModel>();

rsuMob->SetPosition(Vector(100.0, 50.0, 0.0));

// Install WAVE (802.11p) devices

YansWifiChannelHelper waveChannel = YansWifiChannelHelper::Default();

YansWifiPhyHelper wavePhy = YansWifiPhyHelper::Default();

wavePhy.SetChannel(waveChannel.Create());

NqosWaveMacHelper waveMac = NqosWaveMacHelper::Default();

WaveHelper waveHelper = WaveHelper::Default();

NetDeviceContainer waveDevices = waveHelper.Install(wavePhy, waveMac, vehicles);

NetDeviceContainer rsuDevice = waveHelper.Install(wavePhy, waveMac, rsu);

// Install Internet stack

InternetStackHelper internet;

internet.Install(vehicles);

internet.Install(rsu);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer vehicleInterfaces = address.Assign(waveDevices);

Ipv4InterfaceContainer rsuInterface = address.Assign(rsuDevice);

// Install applications (e.g., UDP echo)

uint16_t port = 9;

UdpEchoServerHelper echoServer(port);

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

serverApps.Start(Seconds(1.0));

serverApps.Stop(Seconds(20.0));

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

echoClient.SetAttribute(“MaxPackets”, UintegerValue(100));

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

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

ApplicationContainer clientApps = echoClient.Install(vehicles);

clientApps.Start(Seconds(2.0));

clientApps.Stop(Seconds(20.0));

// Enable animation

AnimationInterface anim(“vsn-animation.xml”);

Simulator::Stop(Seconds(20.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 4: Run the Simulation

  1. Compile the Simulation:

./waf configure –enable-examples

./waf build

Run the Simulation:

./waf –run scratch/<your-simulation-script>

Step 5: Analyse Results

Use the NetAnim tool to visualize the simulation results.

netanim vsn-animation.xml

Additional Considerations:

  • Advanced Mobility Models: Use the SUMO (Simulation of Urban MObility) tool to create realistic vehicular mobility traces and import them into ns3.
  • Data Collection: Implement data collection methods to gather metrics like packet delivery ratio, latency, and throughput.
  • Protocol Optimization: Explore different communication protocols and their optimization for VSNs.

Overall, here we can describe the Vehicular Sensor Network that had implemented in ns3 simulator and also analyse the Vehicular Sensor Network. We provide further information related to Vehicular Sensor Network how it adjusts with diverse simulations.

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