How to Implement Network Mobility Control in OMNeT++

To implement the Network Mobility Control in OMNeT++ requires us to configure a simulated environment which contains mobile nodes, stating mobility models and executing control features to handle the movement of these nodes inside the network. Below is a step-by-step guide to help you implement network mobility control in OMNeT++:

Step-by-Step Implementation:

1. Set Up OMNeT++ and INET Framework

• Make sure that you have both OMNeT++ and INET framework is installed.
• Build a new project in OMNeT++ and include the INET framework that offers mobility models and modules for mobile networks.

2. Define the Network Topology with Mobile Nodes

• State a network topology that has mobile nodes (like vehicles, drones, or mobile devices) using an .ned file.
• Use the MobileHost or AdhocHost modules from the INET framework, which are designed to help mobility.

Example .ned file:

network MobilityControlNetwork {

submodules:

host1: AdhocHost {

@display(“p=100,100”);

}

host2: AdhocHost {

@display(“p=200,100”);

}

host3: AdhocHost {

@display(“p=150,150”);

}

connections:

host1.wlan[0] <–> AdhocHost.wlan[0] <–> host2.wlan[0];

host2.wlan[0] <–> AdhocHost.wlan[0] <–> host3.wlan[0];

host3.wlan[0] <–> AdhocHost.wlan[0] <–> host1.wlan[0];

}

3. Specify Mobility Models

• Create the mobility model for each mobile node in the .ini file. INET offers numerous built-in mobility models like ConstantSpeedMobility, RandomWaypointMobility, GaussMarkovMobility, etc.

Example .ini file:

[Config MobilityControl]

network = MobilityControlNetwork

sim-time-limit = 100s

*.host1.mobility.typename = “ConstantSpeedMobility”

*.host1.mobility.speed = 10mps

*.host1.mobility.startPosition = “100,100”

*.host1.mobility.angle = 90deg

*.host2.mobility.typename = “RandomWaypointMobility”

*.host2.mobility.speed = uniform(5mps, 15mps)

*.host2.mobility.x = uniform(0m, 300m)

*.host2.mobility.y = uniform(0m, 300m)

*.host3.mobility.typename = “GaussMarkovMobility”

*.host3.mobility.speed = 10mps

*.host3.mobility.alpha = 0.8

*.host3.mobility.positionRange = “300m,300m”

4. Implement Mobility Control Mechanisms

• To control mobility, you can implement algorithms that dynamically modify the mobility model parameters or switch amongst various mobility models depends on network conditions or objectives.
• This can be achieved by writing custom modules or by altering existing ones.

Example of dynamic mobility control:

• You could develop a new module that alters the speed or direction of a mobile node based on network conditions like signal strength or congestion.

Custom mobility control code snippet:

class DynamicMobilityControl : public cSimpleModule

{

protected:

virtual void initialize() override;

virtual void handleMessage(cMessage *msg) override;

void adjustMobility();

};

void DynamicMobilityControl::initialize()

{

// Initialization code

scheduleAt(simTime() + 1, new cMessage(“adjustMobility”));

}

void DynamicMobilityControl::handleMessage(cMessage *msg)

{

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

adjustMobility();

scheduleAt(simTime() + 1, msg); // Reschedule

}

}

void DynamicMobilityControl::adjustMobility()

{

// Example: Increase speed if node is in a congested area

auto mobility = check_and_cast<MovingMobilityBase*>(getParentModule()->getSubmodule(“mobility”));

double currentSpeed = mobility->getSpeed().get();

mobility->setSpeed(currentSpeed + 1); // Increase speed

}

5. Run the Simulation

• Run the simulation and see how the mobile nodes acts based on the mobility models and control mechanisms you’ve implemented.
• Use OMNeT++’s graphical output to visualize the movement of nodes over time.

6. Analyze the Results

• Analyze the simulation results to analyze the performance of the mobility control mechanisms. Metrics to consider such as node coverage, connectivity, signal strength, and network performance.
• Use OMNeT++’s built-in analysis tools or export data for further analysis.

7. Optimization and Fine-Tuning

• Adjust the mobility control algorithms based on the simulation results. This could involve fine-tuning parameters or altering the control logic to better meet your objectives.
• Experiment with various situations like changing node density, speed, or network conditions, to examine the robustness of your mobility control mechanism.

8. Extend and Customize

• Consider extending the simulation to encompass more difficult mobility scenarios like multi-hop communication, handovers amongst base stations, or mobility patterns in urban environments.
• You can also incorporate other network features like routing protocols (e.g., AODV, DSR) to study the communication amongst mobility and routing.

In this demonstration, we provided the step-by-step approach on how to implement the Network Mobility Control in OMNeT++ with the help of INET framework. We covered the information such as defining the network topology has mobile nodes and deploy the mobility nodes mechanisms into the network.

To enhance the simulation performance in Network Mobility Control, our services are at your disposal. Please provide us with the details of your project so that we can offer you tailored guidance. For additional project ideas in Network Mobility Control, do not hesitate to reach out to our researchers for optimal results.