How to Implement Network Emergency Message in OMNeT++

To implement Network Emergency Message Dissemination in OMNeT++ has needs to generate the mechanism to effectively and quickly spread emergency messages through a network and this is vital in scenarios such as vehicular networks, disaster recovery networks, or IoT systems in which timely delivery of emergency information is serious. The below are the procedures to execute the network emergency dissemination in OMNeT++:

Step-by-Step Implementation:

Set up Your OMNeT++ Environment

Make sure OMNeT++ and the INET framework are installed and properly configured.
If the scenario has includes the mobility, like in vehicular networks, we might also use the Veins or SUMO frameworks together with OMNeT++.

Define the Network Topology

Generate a NED file that states the network topology. Relying on scenario, this could contains the mobile nodes like vehicles, fixed infrastructure such as roadside units, and communication links.

Example NED file:

network EmergencyNetwork

{

submodules:

node1: StandardHost;

node2: StandardHost;

node3: StandardHost;

node4: StandardHost;

node5: StandardHost;

controller: StandardHost;

connections:

node1.ethg++ <–> EthLink <–> node2.ethg++;

node2.ethg++ <–> EthLink <–> node3.ethg++;

node3.ethg++ <–> EthLink <–> node4.ethg++;

node4.ethg++ <–> EthLink <–> node5.ethg++;

controller.ethg++ <–> EthLink <–> node3.ethg++;

}

Implement the Emergency Message Generation

Execute a module on one or more nodes that create emergency messages when an event is detected. This module could be influenced by particular conditions or events within the simulation.

Example emergency message generation:

void EmergencyApp::generateEmergencyMessage() {

EmergencyMessage *msg = new EmergencyMessage(“EmergencyMessage”);

msg->setSourceAddress(getParentModule()->getId());

msg->setEmergencyType(“Fire”);

send(msg, “out”);

}

void EmergencyApp::handleMessage(cMessage *msg) {

if (msg->isSelfMessage()) {

generateEmergencyMessage();

scheduleAt(simTime() + par(“messageInterval”).doubleValue(), msg);

}

Example .ini file configuration:

**.node1.app[0].typename = “EmergencyApp”

**.node1.app[0].messageInterval = 5s

Design the Message Dissemination Protocol

Generate a protocol that commands how the emergency message is disseminated across the network and it can be a basic flooding protocol or a more sophisticated method such as multi-hop broadcast or opportunistic forwarding.

Example dissemination protocol:

void EmergencyApp::forwardEmergencyMessage(EmergencyMessage *msg) {

for (int i = 0; i < gateSize(“out”); i++) {

EmergencyMessage *copy = msg->dup();

send(copy, “out”, i);

}

void EmergencyApp::handleMessage(cMessage *msg) {

if (EmergencyMessage *emMsg = dynamic_cast<EmergencyMessage*>(msg)) {

if (!hasMessageBeenProcessed(emMsg)) {

markMessageAsProcessed(emMsg);

forwardEmergencyMessage(emMsg);

}

delete emMsg;

} else {

generateEmergencyMessage();

}

Execute checks to prevent message redundancy and loops, like using a message ID or hop count.

Simulate Network Conditions

Setup the simulation to simulate realistic network conditions that has node mobility (if applicable), changing the network traffic, and potential failures.

Example mobility configuration in the .ini file:

**.node*.mobility.typename = “StationaryMobility”

**.node*.mobility.x = uniform(0, 100)

**.node*.mobility.y = uniform(0, 100)

Simulate and Analyse

Execute the simulation and evaluate the performance of emergency message dissemination protocol. Key metrics to track include:
- Message Delivery Time: How long it takes for the message to reach all nodes.
- Delivery Ratio: The percentage of nodes that successfully receive the emergency message.
- Network Overhead: The number of redundant messages produced during dissemination.
- Hop Count: The number of hops the message takes to reach various parts of the network.

Example result recording in the .ini file:

**.node*.app[0].recordScalar = true

We can measure the outcomes using OMNeT++’s built-in tools or export the data for further analysis in tools such as MATLAB or Python.

Refine and Optimize

Based on the outcomes, refine the dissemination protocol to optimize the performance. Consider factors such as:
- Adaptive Dissemination: Adapt the forwarding strategy based on current network conditions.
- Prioritization: Make sure that more vital emergency messages are dispersed faster.
- Resource Management: Enhance network resources to reduce the overhead and prevent congestion.

Example OMNeT++ Configuration:

network = EmergencyNetwork

sim-time-limit = 200s

**.node*.numApps = 1

**.node*.app[0].typename = “EmergencyApp”

**.node*.app[0].messageInterval = exponential(5s)

**.node*.mobility.typename = “StationaryMobility”

**.node*.mobility.x = uniform(0, 100)

**.node*.mobility.y = uniform(0, 100)

**.controller.app[0].typename = “CentralControllerApp”

Additional Considerations:

Fault Tolerance: Make sure that dissemination protocol is robust to node failures or communication link disruptions.
Energy Efficiency: To deliberate the energy consumption of nodes specifically in battery-powered or mobile devices, and enhance the protocol accordingly.
Scalability: Examine the protocol with a large number of nodes to make sure it scales effectively.

References:

Assessment the existing research on emergency message dissemination in vehicular ad hoc networks (VANETs) and wireless sensor networks (WSNs) for cutting-edge approaches.
Discover the OMNeT++ and INET framework documentation to familarize available modules and configurations for message dissemination.

We had understand how to deploy the Network Emergency Message Dissemination in OMNet++ simulator that has generate the network to rapidly sends the messages then deploy in the network. More information regarding the Network Emergency Message Dissemination we will provide.

If you want to set up Network Emergency Message Dissemination in OMNeT++, our experts are here to help. Just reach out to omnet-manual.com for top-notch project advice.