How to Calculate Network Coverage Time in omnet++
To calculate the network coverage time in OMNeT++ has includes establishing the time taken over which a particular area or set of nodes remains in the coverage of one or more network nodes. Coverage time is a crucial metric, specifically in mobile and wireless networks, where nodes may transfer in and out of coverage zones.
Step-by-Step Implementations:
- Understand Network Coverage Time
Network coverage time denotes to the total time a particular area or set of nodes is always covered by the network. Key factors affecting coverage time contain:
- Node Mobility: Movement of nodes can affect them to enter or leave coverage areas.
- Network Topology: The arrangement and density of nodes affect how long an area or node remains covered.
- Environmental Factors: Obstacles and interference can affect coverage.
- Set up a Network with Coverage Components
Form a network topology that contains mobile or static nodes in OMNeT++. These nodes will establish the coverage over time as they transfer or communicate.
Example: Define a Network with Coverage Components in NED
network CoverageTimeNetwork {
submodules:
baseStation: BaseStation;
node[10]: MobileNode; // Array of 10 mobile nodes
}
- Implement Coverage Time Calculation
To estimate coverage time, we require to observe the time over which an area or node remains in the communication range of one or more network nodes.
Example: Implementing Coverage Time Monitoring
#include <omnetpp.h>
#include <cmath>
using namespace omnetpp;
class CoverageTime : public cSimpleModule {
private:
double coverageRadius = 100.0; // Communication range of each node
double areaWidth = 500.0; // Width of the area
double areaHeight = 500.0; // Height of the area
double coverageThreshold = 95.0; // Percentage of area coverage considered “covered”
simtime_t totalCoverageTime = 0; // Total time the area is covered
simtime_t lastCheckTime = 0; // Last time coverage was checked
protected:
virtual void initialize() override {
// Schedule periodic checks for coverage
scheduleAt(simTime() + 1.0, new cMessage(“checkCoverage”));
}
virtual void handleMessage(cMessage *msg) override {
if (strcmp(msg->getName(), “checkCoverage”) == 0) {
// Check if the area is covered and update coverage time
double areaCoverage = calculateAreaCoverage();
if (areaCoverage >= coverageThreshold) {
totalCoverageTime += simTime() – lastCheckTime;
}
lastCheckTime = simTime();
// Schedule the next coverage check
scheduleAt(simTime() + 1.0, msg);
}
}
double calculateAreaCoverage() {
int coveredPoints = 0;
int totalPoints = 0;
// Iterate over a grid of points in the area
for (double x = 0; x <= areaWidth; x += 10) {
for (double y = 0; y <= areaHeight; y += 10) {
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;
}
virtual void finish() override {
// Record the total coverage time at the end of the simulation
recordScalar(“Total Coverage Time”, totalCoverageTime.dbl());
}
};
Define_Module(CoverageTime);
- Simulate the Network
Run the simulation to permit the nodes to move and communicate. The CoverageTime module will periodically verify the coverage of the area or nodes and gather the total coverage time.
- Monitor and Analyse Coverage Time
The total coverage time is recorded as a scalar value after running the simulation. We can use OMNeT++’s analysis tools to observe this value and know how long the network offered coverage over the area or nodes.
- Advanced Coverage Time Analysis
For a further detailed analysis, we can:
- Vary Node Mobility: Mimic various mobility models like random waypoint, Gauss-Markov to see how they affect coverage time.
- Include Environmental Factors: Insert obstacles or interference models to see how they impact coverage time.
- Simulate Different Network Densities: Variant the number of nodes to see how density affects coverage time.
- Example Scenario
In this example, the CoverageTime module estimates the total time that the area remains covered by the network. The coverage time is noted as a scalar result for post-simulation analysis.
network CoverageTimeExample {
submodules:
baseStation: BaseStation;
node[10]: MobileNode; // Array of 10 mobile nodes
}
- Post-Simulation Coverage Time Analysis
Use the scalar results recorded during the simulation to analyse the coverage time. We can plot the results to see how coverage time changes over the duration of the simulation or under various conditions.
Hence, we had effectively executed the simple procedure to calculate and analyse the Network Coverage Time using the tool OMNeT++. Additional informations will provide based on your requirements. Please share your parameter information with us, and we will assist you with the Network Coverage Time in the omnet++ tool for your project. We manage network project performance depending on your requirements.