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.

2. 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.

3. 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.

4. 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++;

}

5. 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

6. 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.

7. 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.

8. 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

9. 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.