How to Implement Network Telepresence in OMNeT++

To implement the network Telepresence in OMNeT++, we need to simulate a system that permits users to communicate remotely while they were physically present in other location. It is usually includes real-time audio, video and possibly control data (example: for robotic systems) exchanged through the network. It will concentrates on the transmission of these data kinds, making certain low latency and high availability to uphold the sense of presence.

It has the step-by-step guide to implementing a basic network telepresence system in OMNeT++:

Step-by-Step Implementation:

1. Set Up OMNeT++ and INET Framework

• Make certain that OMNeT++ and the INET framework are installed and configured properly.
• Generate a new project in OMNeT++ and attaching INET framework that offers the the necessary modules for network simulations.

2. Design the Network Topology

• Use ,ned file, State the network topology that should contain multiple clients (indicating telepresence participants) and a server or robot that they communicate with remotely.

Example .ned file:

network TelepresenceNetwork {

submodules:

client1: StandardHost {

@display(“p=100,200”);

}

client2: StandardHost {

@display(“p=300,200”);

}

telepresenceServer: StandardHost {

@display(“p=200,100”);

}

router: Router {

@display(“p=200,150”);

}

connections:

client1.ethg++ <–> Ethernet100M <–> router.pppg++;

client2.ethg++ <–> Ethernet100M <–> router.pppg++;

router.pppg++ <–> Ethernet1G <–> telepresenceServer.ethg++;

}

This network contains two clients and a telepresence server linked through a router. The server could denote a robotic system or a central telepresence platform.

3. Model Real-Time Audio, Video, and Control Streams

• Execute modules to simulate the transmission of real-time audio, video, and control data amongst the clients and the telepresence server. These streams can be modeled using UDP or RTP (Real-time Transport Protocol) for real-time communication.

Example of a basic video stream simulation:

class VideoStreamApp : public cSimpleModule

{

protected:

virtual void initialize() override;

virtual void handleMessage(cMessage *msg) override;

void sendVideoFrame();

};

void VideoStreamApp::initialize()

{

scheduleAt(simTime() + 0.04, new cMessage(“sendFrame”));  // Simulate 25 FPS

}

void VideoStreamApp::handleMessage(cMessage *msg)

{

if (strcmp(msg->getName(), “sendFrame”) == 0) {

sendVideoFrame();

scheduleAt(simTime() + 0.04, msg);  // Schedule next frame

}

}

void VideoStreamApp::sendVideoFrame()

{

cPacket *frame = new cPacket(“videoFrame”);

frame->setByteLength(50000);  // Example: 50 KB per frame

send(frame, “out”);

EV << “Sent video frame at ” << simTime() << endl;

}

Example of a control data stream simulation:

class ControlStreamApp : public cSimpleModule

{

protected:

virtual void initialize() override;

virtual void handleMessage(cMessage *msg) override;

void sendControlSignal();

};

void ControlStreamApp::initialize()

{

scheduleAt(simTime() + 0.1, new cMessage(“sendSignal”));  // Simulate control signal every 100ms

}

void ControlStreamApp::handleMessage(cMessage *msg)

{

if (strcmp(msg->getName(), “sendSignal”) == 0) {

sendControlSignal();

scheduleAt(simTime() + 0.1, msg);  // Schedule next control signal

}

}

void ControlStreamApp::sendControlSignal()

{

cPacket *signal = new cPacket(“controlSignal”);

signal->setByteLength(100);  // Example: 100 bytes per control signal

send(signal, “out”);

EV << “Sent control signal at ” << simTime() << endl;

}

This module mimics the transmission of control signals like commands to a remote robot.

4. Configure the Simulation

• Configure the simulation parameters in the .ini file to run the telepresence simulation.

Example .ini file configuration:

[Config TelepresenceSimulation]

network = TelepresenceNetwork

sim-time-limit = 100s

*.client1.numApps = 2

*.client1.app[0].typename = “VideoStreamApp”

*.client1.app[1].typename = “ControlStreamApp”

*.client2.numApps = 2

*.client2.app[0].typename = “VideoStreamApp”

*.client2.app[1].typename = “ControlStreamApp”

*.telepresenceServer.numApps = 2

*.telepresenceServer.app[0].typename = “VideoStreamApp”

*.telepresenceServer.app[1].typename = “ControlStreamApp”

This generation sets up each client and the telepresence server to send and receive both video and control streams.

5. Simulate Network Conditions

• Optionally, imitate various network conditions like latency, jitter, packet loss, and bandwidth restrictions to study their influence on telepresence quality.

Example of presenting network latency:

**.delay = 20ms  # Simulate 20ms latency on all connections

Example of introducing packet loss:

**.packetLossProbability = 0.01  # 1% packet loss on all connections

6. Run the Simulation

• Execute the simulation in OMNeT++ to monitor how the telepresence system operates. Observe the transmission of video, audio, and control data amongst the clients and the telepresence server.
• Use OMNeT++’s built-in tools to visualize the data flows and investigate the quality of the telepresence experience.

7. Analyze the Results

• After running the simulation, evaluate the performance of the telepresence setup. Concentrate on metrics like latency, jitter, packet loss, and throughput to analyze the quality of the video, audio, and control streams.
• Check the logs and output files to make certain that the data streams are transmitted properly and that the simulation reflects realistic telepresence actions.

8. Optimize and Extend

• Based on the analysis, enhance the telepresence simulation. it involve altering the bitrates, frame sizes, or packet intervals to maximize quality or decrease network load.
• Consider extending the imitation to include more difficult situations like multi-user sessions, robotic control with feedback, or adaptive bitrate streaming.
• Implement feedback mechanisms where the server fine-tunes the data rate or quality according to the network conditions to uphold a smooth telepresence experience.

We acquire distinct knowledge regarding the generation of network topology and modeling the real time audio, video and control streams to implement the Network Telepresence in OMNeT++ which is very helpful for users to communication remotely. If needed, we can offer the simulate them using another technique for you. For optimal implementation assistance regarding Network Telepresence and additional project concepts in this domain, please reach out to omnet-manual.com. We possess all the foremost research to provide you with guidance.