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How to Calculate Network Efficiency in omnet++

To calculate the network efficiency in OMNeT++ has contains examining numerous metrics associated to the network’s performance, like overhead, packet loss, latency, and throughput. The following is step-by-step process on how to calculate network efficiency in OMNeT++:

Step-by-Step Implementations:

  1. Set up the Simulation Environment
  • Define the Network Topology: Use the .ned files to make the network topology. This contains describing the nodes like hosts, routers, switches and the relations among them.
  • Configure Parameters: In the .ini file, set up the essential simulation parameters like the number of nodes, simulation duration, packet size and data rate.
  1. Collect Data during Simulation
  • Throughput: Calculate the amount of data effectively transferred from sender to receiver over a given period. This can be done by computing the whole bytes received at the destination nodes and dividing it by the simulation time.
  • Latency: Compute the time it takes for a packet to travel from the source to the end.
  • Packet Loss: During transmission count the number of packets that were dropped or lost.
  •  Overhead: Measure the extra information like headers added to the data packets.
  1. Implement Custom Statistics Collection
  • To log the essential data during the simulation using OMNeT++’s built-in statistics recording mechanisms. We can use @statistic in .ned files to track particular metrics.
  • Otherwise, we can implement custom data collection using C++ in the model’s source code, where we can programmatically estimate and store metrics such as throughput, latency, etc.
  1. Calculate Network Efficiency

Network efficiency can be evaluated using the following formula:

Network Efficiency=Useful ThroughputTotal Throughput×100%\text{Network Efficiency} = \frac{\text{Useful Throughput}}{\text{Total Throughput}} \times 100\%Network Efficiency=Total ThroughputUseful Throughput​×100%

Where:

  • Useful Throughput: The amount of data that effectively reaches the end without errors.
  • Total Throughput: The total amount of data transmitted, with retransmissions due to control packets, overheads, and errors.

Steps to calculate:

  • Extract Throughput Data: To extract the throughput data by using OMNeT++’s output vector or scalar files. This can be done using the opp_scavetool or by exporting the results to a CSV file.
  • Compute Efficiency: Using the collected data, calculate the useful throughput and divide it by the total throughput. Multiply the result by 100 to get the efficiency percentage.
  1. Analyse Results
  • To plot the results and interpret the efficiency of the network by using OMNeT++’s built-in analysis tools or external tools like MATLAB, Python, or Excel.
  • Compare the network efficiency under various conditions or configurations to appraise the impact of numerous parameters on network performance.

Example Code Snippet

Below is an example of how we might set up the throughput measurement in a .ned file:

module SimpleNetwork

{

@statistic[throughput](“Throughput”, vector, record=bytesReceived

// Rest of your module setup

}

network MyNetwork

{

// Define your network topology here

}

In the corresponding .cc file, we might have something like:

void SimpleHost::handleMessage(cMessage *msg)

{

if (msg->isSelfMessage())

{

// Handle self messages

}

else

{

// Handle incoming messages

bytesReceived += msg->getByteLength();

emit(throughputSignal, bytesReceived);

}

}

This method gathers throughput data during the simulation, which we can later use to estimate the network efficiency.

  1. Run the Simulation
  • Perform the simulation and gather the results.
  • Examine the efficiency using the gathered data.

By following these steps, we can successfully measure and analyse network efficiency in OMNeT++.

Overall this paper, we are proceed more informations and step-by-step procedure to implement and calculate the Network Efficiency using OMNeT++. We will offer further details based on your desires. omnet-manual.com can help you improve Network Efficiency using the omnet++ tool for your project. Please share your parameter details with us. We will keep tracking the performance of your network project according to your standards by analyzing the parameter data.

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