How to Calculate Network Coverage Reliability in omnet++
To calculate the network coverage reliability in OMNeT++ has encompasses measuring how constantly the network offers coverage to a particular area or set of nodes over time. Coverage reliability is vital in networks where continuous connectivity is essential, like in mobile networks, wireless communication systems, and sensor networks.
Step-by-Step Implementations:
- Understand Network Coverage Reliability
Network coverage reliability denotes to the probability that a given area or set of nodes remains in the communication range of one or more network nodes over a specific period. Key factors that affect coverage reliability contain:
- Node Mobility: Modifications in the positions of nodes over time.
- Node Failures: The possibility of nodes going offline or becoming inaccessible.
- Environmental Changes: Factors like obstacles or signal interference that might impact coverage.
- Set up a Network with Mobility and Failure Components
Generate a network topology that contains potential node failures, or dynamic environmental, mobile nodes conditions that might affect coverage in OMNeT++,.
Example: Define a Network with Mobility and Failures in NED
network CoverageReliabilityNetwork {
submodules:
baseStation: BaseStation;
node[10]: WirelessNode; // Array of 10 wireless nodes
}
- Implement Coverage Reliability Calculation
We require to compute how often the coverage area remains covered over time, considering potential node mobility and failures.
Example: Implementing Coverage Reliability Calculation
#include <omnetpp.h>
#include <vector>
#include <cmath>
using namespace omnetpp;
class CoverageReliability : public cSimpleModule {
private:
double coverageRadius = 100.0; // Example communication range radius
double areaWidth = 500.0; // Width of the area
double areaHeight = 500.0; // Height of the area
int gridResolution = 10; // Grid resolution for area coverage calculation
int totalTimeSteps = 1000; // Total time steps to simulate
int coveredTimeSteps = 0; // Number of time steps where the area is fully covered
protected:
virtual void initialize() override {
// Schedule the first coverage check
scheduleAt(simTime() + 1.0, new cMessage(“checkCoverage”));
}
virtual void handleMessage(cMessage *msg) override {
if (strcmp(msg->getName(), “checkCoverage”) == 0) {
// Check area coverage at the current time step
if (calculateAreaCoverage() >= 95.0) { // Assuming 95% coverage as reliable
coveredTimeSteps++;
}
// Schedule the next coverage check
if (simTime() < totalTimeSteps) {
scheduleAt(simTime() + 1.0, msg);
} else {
delete msg;
calculateCoverageReliability();
}
}
}
double calculateAreaCoverage() {
int coveredPoints = 0;
int totalPoints = 0;
// Iterate over a grid of points in the area
for (double x = 0; x <= areaWidth; x += gridResolution) {
for (double y = 0; y <= areaHeight; y += gridResolution) {
totalPoints++;
if (isPointCovered(x, y)) {
coveredPoints++;
}
}
}
return (double)coveredPoints / totalPoints * 100.0;
}
bool isPointCovered(double x, double y) {
// Check if the point (x, y) is within the coverage radius of any node
for (int i = 0; i < getParentModule()->par(“numNodes”); i++) {
cModule *node = getParentModule()->getSubmodule(“node”, i);
double nodeX = node->par(“x”);
double nodeY = node->par(“y”);
double distance = sqrt(pow(x – nodeX, 2) + pow(y – nodeY, 2));
if (distance <= coverageRadius) {
return true;
}
}
return false;
}
void calculateCoverageReliability() {
double reliability = (double)coveredTimeSteps / totalTimeSteps * 100.0;
EV << “Coverage Reliability: ” << reliability << “%” << std::endl;
recordScalar(“Coverage Reliability”, reliability);
}
};
Define_Module(CoverageReliability);
- Simulate Network with Mobility and Failures
In the OMNeT++ simulation, permit the nodes to move (if applicable) or fail along with a model to define. The CoverageReliability module will periodically verify the coverage and track how reliable it is over time.
Example: Node Mobility Implementation
class WirelessNode : public cSimpleModule {
protected:
virtual void initialize() override {
// Schedule the first mobility event
scheduleAt(simTime() + par(“mobilityInterval”).doubleValue(), new cMessage(“move”));
}
virtual void handleMessage(cMessage *msg) override {
if (strcmp(msg->getName(), “move”) == 0) {
// Randomly move the node within the area
double x = uniform(0, 500); // Example for 500×500 area
double y = uniform(0, 500);
par(“x”).setDoubleValue(x);
par(“y”).setDoubleValue(y);
// Schedule the next mobility event
scheduleAt(simTime() + par(“mobilityInterval”).doubleValue(), msg);
}
}
};
Define_Module(WirelessNode);
- Monitor and Analyse Coverage Reliability Data
The logs and metrics made by the CoverageReliability module can be analysed to evaluate how reliably the network covers the area over time.
Metrics:
- Coverage Reliability (%): The percentage of time the area remains covered according to the desired threshold like 95% coverage.
- Advanced Coverage Reliability Analysis
For further complete coverage reliability analysis, we might need to:
- Simulate Different Mobility Patterns: Use various mobility models like random waypoint, Gauss-Markov to understand how they affect coverage reliability.
- Vary Node Failure Rates: Mimic various node failure rates to know their impact on reliability.
- Include Environmental Factors: Simulate changing environmental conditions, like obstacles or interference, to see how they affect coverage.
- Example Scenario
In the below example, the CoverageReliability module determines the coverage reliability over time, considering node mobility and potential failures. The reliability metric is note down as a scalar result for post-simulation analysis.
network CoverageReliabilityExample {
submodules:
baseStation: BaseStation;
node[10]: WirelessNode; // Array of 10 wireless nodes
}
- Post-Simulation Coverage Reliability Analysis
To observe the recorded coverage reliability metric, which will help we know how constantly the network maintains coverage over time by using OMNeT++’s analysis tools.
From the following details are expressed how to monitor, analyse and calculate the Network courage reliability using the tool OMNeT++. We are provided more details following your needs. Give us the specifics of your parameters, and we’ll assist you with the Network Coverage Reliability in the Omnet++ tool for your project. Our network simulation performance is managed according to your specifications. The specialists at omnet-manual.com are available to help with your investigation.