How to Start Point-to-Point Topology Projects Using OMNeT++

To start a Point-to-Point Topology Simulation using OMNeT++ we need to create a network topology in which nodes are associated directly with a dedicated link. This topology is frequently utilised in simple networks or for replicating interaction among two devices.

Following is a comprehensive approach to starting a Point-to-Point Topology Project in OMNeT++:

Steps to Start Point-to-Point Topology Project in OMNeT++

  1. Understand Point-to-Point Topology
  • Definition: A point-to-point topology has two nodes that are associated directly with a dedicated interaction link.
  • Characteristics:
    • Simple and reliable.
    • High performance by reason of dedicated bandwidth.
    • Generally utilised within wired interactions and simple testing coinfigurations.
  • Applications:
    • Simple wired networks like LAN segments.
    • Direct device-to-device interaction.
  1. Set Up OMNeT++ and INET Framework
  • Install OMNeT++: We should download and install the new version of OMNeT++ environment on the system.
  • Install INET Framework:
    • INET framework offers modules for wired and wireless interaction.
  1. Define Project Scope

Step 3.1: Goals

  • Replicate the data transfer among two nodes through point-to-point link.
  • Measure the basic performance parameters such as:
    • Latency.
    • Throughput.

Step 3.2: Metrics

  • Latency: Compute the duration to pass through the link for packets.
  • Throughput: Volume of data that are sent across the link.
  1. Design the Point-to-Point Topology

Create a network topology containing two nodes that are directly associated using point-to-point link.

Example .ned File:

network PointToPointTopology {

submodules:

nodeA: StandardHost;  // Source node

nodeB: StandardHost;  // Destination node

connections:

nodeA.ethg++ <–> EthernetLink <–> nodeB.ethg++;

}

  1. Configure Node Behavior

Step 5.1: Data Transmission

Replicate the traffic among two nodes to utilise INET’s UdpBasicApp.

Example .ini File Configuration:

[Config PointToPointTopologySimulation]

network = PointToPointTopology

# Traffic configuration for nodeA (source)

**.nodeA.numApps = 1

**.nodeA.app[0].typename = “UdpBasicApp”

**.nodeA.app[0].destAddress = “nodeB”

**.nodeA.app[0].startTime = 1s

**.nodeA.app[0].sendInterval = uniform(1s, 2s)

**.nodeA.app[0].packetLength = 512B

# Traffic configuration for nodeB (sink)

**.nodeB.numApps = 1

**.nodeB.app[0].typename = “UdpSink”

# Simulation time

sim-time-limit = 50s

  1. Run and Visualize the Simulation
  • Run the Simulation: In OMNeT++, we can execute the simulation.
  • Monitor Behavior:
    • Packets are transmitted from nodeA to nodeB.
    • Observe the key performance indicators like latency and throughput.
  1. Analyze Results

Metrics to Evaluate:

  1. Latency:
    • Compute the duration passing through from nodeA to nodeB for packets.
  2. Throughput:
    • Measure the rate of transfer data among the two nodes.

Visualization:

  • Envision traffic flows and node communications with the support of OMNeT++’s built-in tools for visualization.
  1. Enhance the Project

Step 8.1: Add Traffic Types

  • Mimic various kinds of traffic like TCP, UDP.
  • Transmit simultaneous traffic to utilise several applications on the similar nodes.

Step 8.2: Simulate Errors

  • Launch the link errors or delays for examining its influence over the interaction.

Step 8.3: Increase Complexity

  • Integrate more point-to-point connections for replicating a chain or a ring topology.

Step 8.4: Wireless Point-to-Point Communication

  • Mimic point-to-point interaction devoid of physical link to utilise wireless modules of INET framework.

Example Wireless Configuration:

*.nodeA.wlan.radio.channelNumber = 11

*.nodeB.wlan.radio.channelNumber = 11

*.nodeA.wlan.snrThreshold = 10dB

*.nodeB.wlan.snrThreshold = 10dB

  1. Example Output
  • Before Enhancements:
    • Data passes through from nodeA to nodeB.
    • Under typical conditions, the performance metrics like latency and throughput are reliable.
  • After Enhancements:
    • Errors or delays influence interaction parameters to offer detailed insights to network performance in diverse conditions.

We provided brief simulation techniques that support you to start and simulate the Point-to-Point Topology projects through OMNeT++ simulation environment. If you want any more assistance for executing specific features like error simulation, advanced traffic types, or dynamic conditions, we will guide you.