How to Start Partial Mesh Topology Projects Using OMNeT++

To stimulate a Partial Mesh Topology project in OMNeT++ has been including the network set up in which some nodes are interrelated by another one nevertheless all nodes are directly linked in each node. This topology is used in this environment that full linked in the unwanted and some connections are can be known avoid for the cost of performance or other model reasons. It generally views in network environment such as backbone networks or ad hoc networks in which not each node require to transmission through each other node is directly.

Here is a step-by-step guide to create a Partial Mesh Topology in OMNeT++:

Steps to Start Partial Mesh Topology Projects Using OMNeT++

Step 1: Install OMNeT++ and INET Framework

Previously starting the project, we assure have together OMNeT++ and the INET Framework installed.

Install OMNeT++:
- Download OMNeT++ from the official website and observe the installation procedures.
Install INET Framework:
- Download the INET Framework from the INET GitHub repository and track the steps.

Step 2: Create a New OMNeT++ Project

Open OMNeT++ IDE.
Create a New OMNeT++ Project:
- Start File → New → OMNeT++ Project.
- Select a name for your project for sample PartialMeshTopology and set the project location.

Step 3: Define the Partial Mesh Topology

In Partial Mesh Topology, not all nodes are linked to every other node. We want to manually detail the linked among the nodes. This can be complete in a .ned file, in which we describe the network and the interrelated among the nodes.

Example: Partial Mesh Topology with 6 Nodes

Create a .ned file for sample PartialMesh.ned we explain the network:

network PartialMesh

{

parameters:

int numNodes = 6; // Number of nodes in the network

submodules:

nodes[par(numNodes): Node]; // Array of nodes

connections:

// Partial mesh connections: nodes are connected based on the design

// Connecting nodes 0 and 1

nodes[0].ethg++ <–> EtherInterface <–> nodes[1].ethg++;

// Connecting nodes 1 and 2

nodes[1].ethg++ <–> EtherInterface <–> nodes[2].ethg++;

// Connecting nodes 2 and 3

nodes[2].ethg++ <–> EtherInterface <–> nodes[3].ethg++;

// Connecting nodes 3 and 4

nodes[3].ethg++ <–> EtherInterface <–> nodes[4].ethg++;

// Connecting nodes 4 and 5

nodes[4].ethg++ <–> EtherInterface <–> nodes[5].ethg++;

// Additional connections for partial mesh (optional)

// For instance, connecting nodes 0 and 3

nodes[0].ethg++ <–> EtherInterface <–> nodes[3].ethg++;

// Connecting nodes 1 and 4

nodes[1].ethg++ <–> EtherInterface <–> nodes[4].ethg++;

}

Explanation:

numNodes: The total number of nodes in the network such as 6 in this case.
nodes: An array classify the nodes in the network for a node.
connections: This part explain that nodes are linked to every other node. In a Partial Mesh, however nodes are linked to each other, only choose the nodes are directly linked the network.

For instance:

The nodes 0, 1, and 2 form section for the network and are linked the sequentially.
Improve the connections such as nodes 0 and 3, or nodes 1 and 4 are enhance to build a partial mesh.

We can alter the number of nodes and links to certain the particular partial mesh model.

Step 4: Define the Node Module

After, state the behavior of every node. For simplicity, we can use the EtherHost component to signify the every node in the network. That will replicate the Ethernet communication.

Create a .ned file for instance Node.ned for the node component:

module Node

{

parameters:

@display(“i=block/server”); // Display properties (for visualization)

submodules:

ethg: EtherHost; // Ethernet host (communication interface)

connections:

ethg++ <–> EtherInterface <–> ethg++; // Ethernet connection

}

Explanation:

EtherHost: It classify the node through an Ethernet interface for communication.
EtherInterface: It links the node for the network.

This module is used to explain the transmission interface for every node in the network.

Step 5: Configure Simulation Parameters

After topology and node modules are explain configure for the replication parameters in the omnetpp.ini file.

Create or edit the omnetpp.ini file:

[General]

network = PartialMesh # Name of the network model

# Simulation settings

sim-time-limit = 100s # Total simulation time

*.numNodes = 6 # Total number of nodes in the network

# Packet generation configuration for each node

*.nodes[*].app.packetRate = 100pkts/s # Example packet rate for each node

Explanation:

network: It detailed explain the network component to use like as defined in the .ned file.
sim-time-limit: It configure the number of replication duration.
numNodes: Describe the total number of nodes in the partial mesh network for a numNodes.
packetRate: It has detailed the packet generation rate for every node.

Step 6: Build and Run the Simulation

Build the Project:
- Right-click on the project and choose the Build Project to compile the .ned files and any other necessary components.
Run the Simulation:
- Next create the project, Press the Run button we start the replication.
Visualize the Simulation:
- OMNeT++ Delivers the GUI which assigns you to envision for the network and the connections among nodes. We can also track the packet transmission and examine the behavior of the topology.

Step 7: Enhance the Partial Mesh Topology

Next, the essential process are replicate, we can improve the topology through increase the further advanced features or settings.

Traffic Patterns:

Execute the various kinds of congestion such as TCP or UDP for several applications. For sample, the nodes could replicate the web servers and clients, or file-sharing applications.

Routing Protocols:

Increase the routing protocols such as AODV, OSPF, or RIP for further complex network behavior. These protocols will supports the nodes route congestion by network intelligently.

Mobility:

Improve the mobility models for sample Random Waypoint, Gauss-Markov to replicate the dynamic networks in which nodes are actions the over time. This is used for mobile networks or vehicular ad hoc networks (VANETs).

Security and Fault Tolerance:

Introduce security attacks (e.g., DoS, eavesdropping) or simulate node/link failures to test the network’s robustness in a partial mesh configuration.

Quality of Service (QoS):

Execute and measure the Quality of Service (QoS) parameters metrics like as latency, jitter, and throughput we assigns the network performance below various environment.

Step 8: Analyze the Results

Next process for the replication to use the OMNeT++’s analysis tools we track the parameter metrics such as:

Packet loss: The number of packets are delete in the during transmission.
Throughput: The total number of data transmitted over the network.
Latency: The duration it takes for a packet we travel from source to destination.
Routing Performance: If routing protocols are used the calculate their effectiveness, for routing performance.

We can use Wireshark for deeper packet-level analysis if required.

Conclusion

We build a Partial Mesh Topology in OMNeT++:

Define the topology in a .ned file through detailed a subset for node linked to the partial mesh.
Create node modules using EtherHost we replicate the network’s transmission interfaces.
Configure simulation parameters in omnetpp.ini for node setting, traffic rates, and replication time.
Build and run the simulation in OMNeT++ generate the process for the replication.
Enhance the topology through imporve the congestion models, routing protocols, mobility, security features, and QoS measurements.
Analyze the simulation results we assigns the network performance, connectivity, and behavior.

With these steps, you can successfully simulate and experiment with a Partial Mesh Topology in OMNeT++.

From the demonstration we completely aggregate the information about the installation process and simulation procedure for Partial Mesh Topology that were deploy in the tool of OMNeT++. A separate document will be available to resolve your project-related queries.