How to Begin Implement Network Coverage Reliability in NS3

To implement the network coverage reliability in NS-3 environment has includes the estimating on how the consistently of network delivers coverage the complete time or below the different environment for instance mobility, interference, node failure. This performance of parameter metric has calculated the probability which specified the area or set of nodes remains are enclosed the complete time.

Here’s how to implement network coverage reliability in NS-3:

Steps to Begin Implement Network Coverage Reliability in NS3

Step 1: Define Coverage Reliability

1. Key Metric:
   • Coverage Reliability is the probability which a precise zone or set of goal nodes remains the coverage range for one or further active nodes in complete the time.
2. Mathematical Representation:

Coverage Reliability=Time CoveredTotal Time\text{Coverage Reliability} = \frac{\text{Time Covered}}{\text{Total Time}}Coverage Reliability=Total TimeTime Covered​

where “Time Covered” is the duration for the aimed area or nodes are remain covered.

Step 2: Plan Implementation Scope

1. Network Type:
   • Then kinds of network such as Wireless Sensor Networks (WSN), Wi-Fi, cellular, or custom networks.
2. Coverage Conditions:
   • The coverage environments are static or mobile nodes.
   • Effect of intrusion, failures, or dynamic node distribution.
3. Evaluation Targets:
   • Complete the replication zone.
   • Precise the aimed zones or nodes.

Step 3: Create a Coverage Reliability Module

Header File (coverage-reliability.h)

#include “ns3/node-container.h”

#include “ns3/mobility-model.h”

#include “ns3/simulator.h”

#include <set>

class CoverageReliability {

public:

CoverageReliability ();

virtual ~CoverageReliability ();

void SetSimulationArea (double width, double height);

void AddNode (ns3::Ptr<ns3::Node> node, double range);

void SetTargetArea (double xMin, double xMax, double yMin, double yMax);

void StartMonitoring (double interval);

double GetCoverageReliability ();

private:

struct Circle {

double x, y, radius;

};

struct Area {

double xMin, xMax, yMin, yMax;

};

double m_width;

double m_height;

double m_totalTime;

double m_coveredTime;

std::vector<Circle> m_coverageCircles;

Area m_targetArea;

void CheckCoverage ();

bool IsPointCovered (double x, double y);

};

Implementation File (coverage-reliability.cc)

Constructor and Area Setup

CoverageReliability::CoverageReliability () : m_width(0), m_height(0), m_totalTime(0), m_coveredTime(0) {}

CoverageReliability::~CoverageReliability () {}

void CoverageReliability::SetSimulationArea (double width, double height) {

m_width = width;

m_height = height;

}

void CoverageReliability::SetTargetArea (double xMin, double xMax, double yMin, double yMax) {

m_targetArea = {xMin, xMax, yMin, yMax};

}

Add Nodes and Their Coverage Areas

void CoverageReliability::AddNode (ns3::Ptr<ns3::Node> node, double range) {

ns3::Ptr<ns3::MobilityModel> mobility = node->GetObject<ns3::MobilityModel>();

double x = mobility->GetPosition().x;

double y = mobility->GetPosition().y;

Circle coverageCircle = {x, y, range};

m_coverageCircles.push_back(coverageCircle);

}

Start Monitoring

Schedule periodic checks for coverage reliability.

void CoverageReliability::StartMonitoring (double interval) {

ns3::Simulator::Schedule(ns3::Seconds(interval), &CoverageReliability::CheckCoverage, this);

ns3::Simulator::Schedule(ns3::Seconds(interval), &CoverageReliability::StartMonitoring, this, interval);

}

Check Coverage

Estimate the aimed zone is covered.

void CoverageReliability::CheckCoverage () {

m_totalTime += 1.0; // Increment time step (assume 1 second)

bool isCovered = false;

for (double x = m_targetArea.xMin; x <= m_targetArea.xMax; x += 1.0) {

for (double y = m_targetArea.yMin; y <= m_targetArea.yMax; y += 1.0) {

if (IsPointCovered(x, y)) {

isCovered = true;

break;

}

}

if (isCovered) {

break;

}

}

if (isCovered) {

m_coveredTime += 1.0;

}

}

Point Coverage Check

Define the point in many node’s coverage area.

bool CoverageReliability::IsPointCovered (double x, double y) {

for (const auto& circle : m_coverageCircles) {

double dx = x – circle.x;

double dy = y – circle.y;

if (dx * dx + dy * dy <= circle.radius * circle.radius) {

return true;

}

}

return false;

}

Calculate Coverage Reliability

double CoverageReliability::GetCoverageReliability () {

return (m_coveredTime / m_totalTime) * 100.0;

}

Step 4: Integrate with an NS-3 Simulation

Example Simulation Script

#include “ns3/core-module.h”

#include “ns3/mobility-module.h”

#include “ns3/wifi-module.h”

#include “coverage-reliability.h”

using namespace ns3;

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

NodeContainer nodes;

nodes.Create(10);

MobilityHelper mobility;

mobility.SetPositionAllocator(“ns3::RandomRectanglePositionAllocator”,

“X”, StringValue(“ns3::UniformRandomVariable[Min=0.0|Max=100.0]”),

“Y”, StringValue(“ns3::UniformRandomVariable[Min=0.0|Max=100.0]”));

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

mobility.Install(nodes);

CoverageReliability reliabilityCalculator;

reliabilityCalculator.SetSimulationArea(100.0, 100.0);

reliabilityCalculator.SetTargetArea(40.0, 60.0, 40.0, 60.0);

double communicationRange = 20.0;

for (uint32_t i = 0; i < nodes.GetN(); ++i) {

reliabilityCalculator.AddNode(nodes.Get(i), communicationRange);

}

reliabilityCalculator.StartMonitoring(1.0);

Simulator::Stop(Seconds(100.0));

Simulator::Run();

double reliability = reliabilityCalculator.GetCoverageReliability();

std::cout << “Network Coverage Reliability: ” << reliability << “%” << std::endl;

Simulator::Destroy();

return 0;

}

Step 5: Compile and Run

1. Build the Simulation:

./waf configure

./waf build

1. Run the Simulation:

./waf –run your-script

Step 6: Analyze and Extend

1. Dynamic Scenarios:
   • Launch the node mobility and examine the effect of dependability.
   • It replicates the node failures or dynamic range variations.
2. Performance Improvements:
   • Enhance the test for coverage using a spatial data structures for instance Quadtrees.
   • Used the Monte Carlo procedures for calculate the probabilistic coverage.
3. Advanced Features:
   • Integrate the intrusion and environmental factors.
   • Intended for detailed the node groups are calculating the reliability or devices.

General, we had learned about what coverage reliability is and how it implemented and calculated with the help of ns3 simulation. We also deliver the additional information regarding how coverage reliability investigates in different simulating tools.