How to Implement Trust based Routing in OMNeT++
To implement trust-based routing in OMNeT++ has encompasses to generate a routing protocol where the decision is to forward the packets is based on the reliability of the nodes. The term “Trust-based routing” is especially useful in scenarios like wireless sensor networks (WSNs) and mobile ad hoc networks (MANETs), where nodes can be unreliable or cooperated.You can rely on us for all types of implementation and project details. The below is the guide to implementing trust-based routing in OMNeT++ with examples:
Step-by-Step Implementation:
Step 1: Set Up the OMNeT++ Environment
Make sure that OMNeT++ and essential libraries, like INET, are installed and configured appropriately. INET delivers the numerous networking protocols and tools for building custom routing mechanisms.
Step 2: Define the Trust Model
The trust model has includes to allocate a trust value to each node in the network. The trust value can be based on factors like the history of packet forwarding, energy levels, or reports from neighbouring nodes.
Example Trust Model Definition
class TrustModel
{
public:
double trustValue;
int successfulForwards;
int totalInteractions;
TrustModel() : trustValue(1.0), successfulForwards(0), totalInteractions(0) {}
void updateTrust(bool success)
{
totalInteractions++;
if (success)
successfulForwards++;
// Example: Simple trust calculation based on forwarding success rate
trustValue = (double)successfulForwards / totalInteractions;
}
double getTrustValue()
{
return trustValue;
}
};
Step 3: Define the Trust-Based Routing Node
Describe a node that uses the trust model to create routing decisions and this node will forward packets based on the trustworthiness of its neighbours.
Example Trust-Based Routing Node Definition
module TrustBasedNode
{
parameters:
@display(“i=block/wifilaptop”); // Icon for visualization
gates:
inout wireless; // Wireless communication gate
submodules:
wlan: <default(“Ieee80211Nic”)>; // Wireless NIC for communication
mobility: <default(“MassMobility”)>; // Mobility module (optional)
connections:
wireless <–> wlan.radioIn; // Connect the wireless gate to the NIC
}
Step 4: Implement Trust-Based Routing Logic
Execute the logic for trust-based routing within the node and it encompasses to keep up trust values for neighbouring nodes and using those values to create routing decisions.
Example Trust-Based Routing Logic (Simplified)
class TrustBasedNode : public cSimpleModule
{
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void forwardPacket(cMessage *msg, int destination);
private:
std::map<int, TrustModel> neighborTrust; // Trust values for each neighbor
int nodeId;
int threshold = 0.5; // Trust threshold for forwarding
};
void TrustBasedNode::initialize()
{
nodeId = par(“nodeId”); // Unique ID for this node
}
void TrustBasedNode::handleMessage(cMessage *msg)
{
// Handle incoming packets
int senderId = msg->par(“senderId”).intValue();
int destination = msg->par(“destination”).intValue();
if (destination == nodeId)
{
EV << “Packet received at destination node ” << nodeId << endl;
delete msg;
}
else
{
forwardPacket(msg, destination);
}
}
void TrustBasedNode::forwardPacket(cMessage *msg, int destination)
{
// Find the best neighbor to forward the packet to
int bestNeighbor = -1;
double highestTrust = -1;
for (auto &neighbor : neighborTrust)
{
if (neighbor.second.getTrustValue() > highestTrust && neighbor.second.getTrustValue() > threshold)
{
highestTrust = neighbor.second.getTrustValue();
bestNeighbor = neighbor.first;
}
}
if (bestNeighbor != -1)
{
EV << “Forwarding packet to neighbor ” << bestNeighbor << ” with trust ” << highestTrust << endl;
msg->addPar(“senderId”) = nodeId;
send(msg, “wireless$o”, bestNeighbor);
neighborTrust[bestNeighbor].updateTrust(true);
}
else
{
EV << “No trustworthy neighbor found. Dropping packet.” << endl;
neighborTrust[senderId].updateTrust(false);
delete msg;
}
}
Step 5: Define the Network Scenario
Describe a network scenario where multiple trust-based routing nodes are implemented. This scenario can mimic various kinds of networks such as WSNs or MANETs.
Example Network Scenario Definition
network TrustBasedNetwork
{
parameters:
int numNodes = default(10); // Number of nodes in the network
submodules:
nodes[numNodes]: TrustBasedNode {
@display(“p=100,100”); // Position nodes in the network
}
connections allowunconnected:
for i=0..numNodes-2 {
nodes[i].wireless <–> IdealWirelessLink <–> nodes[i+1].wireless;
}
nodes[numNodes-1].wireless <–> IdealWirelessLink <–> nodes[0].wireless;
}
Step 6: Configure the Simulation Parameters
Setup the mimic the performance metrics in the .ini file has encompassing node-specific settings, initial trust values, and the threshold for forwarding packets.
Example Configuration in the .ini File
network = TrustBasedNetwork
sim-time-limit = 300s
# Node-specific parameters
*.nodes[*].nodeId = index
# Trust model parameters
*.nodes[*].threshold = 0.5 # Trust threshold for forwarding packets
Step 7: Run the Simulation
Compile and execute the simulation. During the simulation, nodes will create routing decisions based on the trustworthiness of their neighbours, which changes over time as they communication.
Step 8: Analyse the Results
To Assess the performance of the trust-based routing protocol using OMNeT++’s analysis tools. Analyse metrics such as:
- Packet Delivery Ratio: The percentage of packets successfully delivered to the destination.
- Trust Values: How trust values change over time for numerous nodes.
- Network Resilience: The ability of the network to function even though the presence of untrustworthy nodes.
Step 9: Extend the Simulation (Optional)
We can expand the simulation by:
- Implementing Different Trust Metrics: Consider various factors in trust calculation, like energy levels, historical data, or multi-hop trust aggregation.
- Simulating Attacks: Establish malicious nodes that drop or adjust packets and monitor how the trust-based routing protocol manages them.
- Testing in Different Environments: Implement the trust-based routing protocol in various types of networks like mobile ad hoc networks (MANETs) or wireless sensor networks (WSNs).
We have learn and understood how to execute the trust based routing using the OMNeT++ simulation tool that delivers the reliability of nodes. We will furnish more details on how the trust based routing is conducted in other simulations.