To simulate Fiber Optic Topology projects using OMNeT++, which encompasses modeling high-speed, long-distance communication links, normally utilizing optical fibers. The INET framework in OMNeT++ offers support for wired and wireless networks however it does not have built-in support for fiber optic transmission. But, we can model fiber optic networks by replicating high-speed, low-latency channels, and optical transmission systems are utilizing custom sets up.
Here, we see how we can simulate a Fiber Optic Topology project in OMNeT++:
Steps for Simulating Fiber Optic Topology in OMNeT++
- Install OMNeT++ and INET Framework:
- Install OMNeT++ and the INET Framework.
- We can download and install the INET framework from INET’s GitHub or use OMNeT++’s package manager.
- Create a New OMNeT++ Project:
- Make a new OMNeT++ project for the fiber optic topology simulation.
- Name the project (e.g., FiberOpticSimulation).
- Configure Fiber Optic Transmission Parameters in NED File:
- Since OMNeT++/INET does not natively support optical fiber-specific metrics (like optical signal-to-noise ratio or wavelength-division multiplexing), we can model the fiber link by setting up too high-speed channels with minimal delay and packet loss.
- We can use DatarateChannel to signify the fiber optic link.
Here’s an instance of a Fiber Optic Topology using NED:
package fiberopticsimulation;
import inet.node.inet.Router;
import inet.node.inet.StandardHost;
import inet.common.misc.ThruputMeteringChannel;
network FiberOpticNetwork
{
types:
// Define a custom fiber optic link (high speed, low latency)
channel FiberOpticLink extends ned.DatarateChannel {
delay = 0.1us; // Very low delay for fiber optics
datarate = 100Gbps; // High data rate for optical fiber
ber = 1e-10; // Low bit error rate for high-quality fiber optic
}
submodules:
// Two routers to simulate fiber optic nodes
router1: Router {
@display(“p=100,100”);
}
router2: Router {
@display(“p=400,100”);
}
// Host devices connected to routers
host1: StandardHost {
@display(“p=50,200”);
}
host2: StandardHost {
@display(“p=450,200”);
}
connections allowunconnected:
// Hosts to routers connections (wired connections, not fiber optic)
host1.ethg++ <–> ThruputMeteringChannel <–> router1.ethg++;
host2.ethg++ <–> ThruputMeteringChannel <–> router2.ethg++;
// Fiber optic link between routers
router1.ethg++ <–> FiberOpticLink <–> router2.ethg++;
}
Explanation of the NED File:
- FiberOpticLink Channel:
- The FiberOpticLink mimics a fiber optic connection with a high datarate of 100Gbps, too low delay of 0.1 microseconds, and a low bit error rate (BER) to reflect the dependability of optical fiber communication.
- Routers:
- The router1 and router2 are the endpoints of the fiber optic link. They can be substituted with switches or other nodes, according to the network setup.
- Hosts:
- The host1 and host2 are standard network devices are associated to the routers. These hosts can transmit and receive data through the fiber optic link among the routers.
- Connections:
- The ThruputMeteringChannel is utilized to estimate throughput among the nodes. The FiberOpticLink connects the two routers that mimicking a fiber optic backbone.
- Configure the Simulation in INI File:
The omnetpp.ini file sets up metrics for the fiber optic simulation, containing packet size, traffic patterns, and logging.
Here’s an instance configuration in omnetpp.ini:
[General]
network = fiberopticsimulation.FiberOpticNetwork
sim-time-limit = 100s
# Fiber optic transmission properties
*.router1.ethg[*].datarate = 100Gbps
*.router2.ethg[*].datarate = 100Gbps
# Traffic generation between hosts
*.host1.numApps = 1
*.host1.app[0].typename = “UdpBasicApp”
*.host1.app[0].destAddresses = “host2”
*.host1.app[0].destPort = 5000
*.host1.app[0].messageLength = 1500B
*.host1.app[0].sendInterval = exponential(1s)
*.host2.numApps = 1
*.host2.app[0].typename = “UdpSink”
*.host2.app[0].localPort = 5000
# Logging and throughput visualization
**.eth[*].displayDatarate = true
Explanation of the INI File:
- Network Selection:
- The network = fiberopticsimulation.FiberOpticNetwork indicates that the simulation will utilize the FiberOpticNetwork described in the NED file.
- Traffic Configuration:
- A UDP application (UdpBasicApp) is configure on host1 to transmit data to host2. The message length is 1500 bytes, and the traffic pattern is described by an exponential distribution for the transmit interval.
- host2 is set up with a UDP Sink application (UdpSink) to receive informations from host1.
- Visualization and Logging:
- The datarate for the Ethernet links is showed in the course of simulation for easy visualization of traffic flow and data rates.
- Run the Simulation:
- We can compile and run the project in OMNeT++. For the period of the simulation, we can envision the data being transmitted over the fiber optic link and examine network performance parameters such as throughput, delay, and packet loss.
Extending the Model:
- Optical Features:
- Even though OMNeT++ does not support advanced fiber optic aspects out-of-the-box, we can execyte or integrate modules for Wavelength-Division Multiplexing (WDM), optical signal attenuation, or optical amplifiers if rerquired.
- Traffic Patterns:
- We can make more complex traffic patterns utilizing TCP, UDP, or custom applications for realistic scenarios, like backbone traffic or data center traffic.
- Multiple Fiber Links:
- Prolong the model by inserting several fiber optic links or redundant connections among the nodes, which denoting real-world scenarios such as metropolitan area networks (MANs) or backbone links among data centers.
- Performance Metrics:
- We can be used OMNeT++’s integrated tools to estimate and visualize performance parameters like throughput, end-to-end delay, packet loss, and error rates.
As illustrated above, simulation approach and extend the model for Fiber Optic Topology projects that were replicated using optical fibers in OMNeT++ platform. We plan to deliver extra details relevant to this projects in upcoming manual.
To successfully simulate Fiber Optic Topology Projects using OMNeT++, the team at phdprime.com is uniquely equipped to assist you. Simply provide us with your project details, and we will offer you comprehensive research guidance tailored to your needs.
