To simulate a Route Source Protocol in OMNeT++ has needs to configure a routing protocol that manage packet forwarding decisions according to the source address or source routing. Source routing is in which the sender requires the thorough path for the packet to take over the network, instead of depend on routers to define the route enthusiastically.
For this instance, we will demonstrate on how to simulate source routing using OMNeT++ and the INET framework, with customizations that permit source routing behaviour. This could implement to protocols such as Dynamic Source Routing (DSR) or similar source-based protocols.
Here is a procedure to simulate the route source protocol using OMNeT++
Steps to Simulate Route Source Protocol Projects in OMNeT++
Step 1: Install OMNeT++ and INET Framework
Ensure OMNeT++ and the INET framework is installed, by way of INET contains base classes and modules for network simulations, together with basic routing protocols.
- Download OMNeT++: OMNeT++.
- Download INET Framework: INET Framework
Step 2: Choose or Implement the Source Routing Protocol
We are using a predefined source routing protocol (such as DSR), it power will be enforced in INET. If not, we need to execute a custom source routing protocol that enable the source node to require the route for each packet.
Source routing protocols usually needs two things:
- Route Discovery: The source node discovers the entire path to the destination.
- Source Packet Forwarding: The packet is forwarded along the pre-discovered path specified by the source.
Step 3: Set Up Network Topology in the NED File
To replicate source routing, we need to configure a network of nodes (hosts and routers). Here’s a simple instance of a network with hosts and routers in a .ned file:
network SourceRoutingNetwork
{
submodules:
host1: StandardHost {
@display(“p=100,100”);
}
host2: StandardHost {
@display(“p=500,100”);
}
router1: Router {
@display(“p=300,200”);
}
router2: Router {
@display(“p=500,300”);
}
router3: Router {
@display(“p=300,300”);
}
connections:
host1.ethg++ <–> Eth100M <–> router1.ethg++;
router1.ethg++ <–> Eth100M <–> router2.ethg++;
router1.ethg++ <–> Eth100M <–> router3.ethg++;
router2.ethg++ <–> Eth100M <–> host2.ethg++;
router3.ethg++ <–> Eth100M <–> router2.ethg++;
}
This configuration describes a simple network with two hosts and three routers. The source node will require specifying the complete path to the destination.
Step 4: Configure the Source Routing Protocol in omnetpp.ini
To allow source routing, we want to describe the routing protocol for each node in the network. Here’s a sample of how we can set up a source routing protocol or custom source routing behaviour in the omnetpp.ini file:
[Config SourceRoutingSimulation]
network = SourceRoutingNetwork
sim-time-limit = 1000s
# Configure IP addresses for hosts and routers
*.host1.ipv4.ip = “10.0.0.1”
*.host2.ipv4.ip = “10.0.0.2”
*.router1.ipv4.ip = “10.0.0.3”
*.router2.ipv4.ip = “10.0.0.4”
*.router3.ipv4.ip = “10.0.0.5”
# Enable custom source routing on hosts and routers
*.host1.routingType = “SourceRouting”
*.host2.routingType = “SourceRouting”
*.router1.routingType = “SourceRouting”
*.router2.routingType = “SourceRouting”
*.router3.routingType = “SourceRouting”
# Source routing configuration
*.host1.routeDiscovery = true
*.host1.pathToHost2 = “router1 router2” # Explicit source route for host1 to host2
In this setup:
- host1 utilize source routing to certain the path it will take to reach host2. The route goes across router1 and router2.
- Each node is setting up to utilize a source routing protocol. This protocol is responsible for forwarding packets along the certain path specified by the source node.
Step 5: Implement the Source Routing Protocol
If the protocol (e.g., DSR) is not already executed, we will require executing the source routing logic yourself. Here’s an defination for a source routing protocol class in C++:
class SourceRouting : public cSimpleModule
{
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void handleRouteDiscovery(cMessage *msg);
void forwardPacket(cMessage *msg, std::vector<std::string> path);
};
In the handleRouteDiscovery function, the source node can explore the full path to the destination and store it in the routing table. In forwardPacket, the node forwards the packet along the pre-determined path.
Step 6: Generate Traffic and Test Source Routing
To create traffic among the hosts, we can set up applications like TCP or UDP servers and clients.
Example traffic generation configuration for host1 to send data to host2:
# Generate traffic: Host1 sends TCP packets to Host2
*.host1.numApps = 1
*.host1.app[0].typename = “TcpBasicClientApp”
*.host1.app[0].localAddress = “10.0.0.1”
*.host1.app[0].connectAddress = “10.0.0.2”
*.host1.app[0].startTime = 10s
*.host1.app[0].numRequestsPerSession = 10
# Configure Host2 as a TCP server
*.host2.numApps = 1
*.host2.app[0].typename = “TcpBasicServerApp”
This configuration will generate a TCP connection from host1 to host2, with the source routing protocol making sure that packets follow the path specified by the source (that is through router1 and router2).
Step 7: Run the Simulation
After configuring the NED files and setting up the protocol in omnetpp.ini, follow these steps:
- Build and compile the INET framework and project in OMNeT++.
- Run the simulation through OMNeT++’s GUI or from the command line.
- Observe packet forwarding: Utilize the OMNeT++ GUI to envision packet forwarding and making sure that packets follow the source-specified route.
Step 8: Analyse Simulation Results
Once the simulation execute, OMNeT++ will create output files (.sca and .vec), that contain the detailed simulation outcomes. We can measure parameter such as:
- End-to-end delay: How long it takes for packets to travel from source to destination.
- Routing efficiency: Assess on how well the source routing protocol prevents congestion or packet drops.
- Packet delivery ratio: How many packets successfully reach the destination?
- Overhead: assess the overhead triggered by route discovery and the storage of source routes.
We can utilize OMNeT++’s built-in result evaluation tools to envision these parameters and fine-tune the performance of source routing protocol.
Step 9: Fine-Tuning and Advanced Scenarios
- Link Failures: We can replicate link failures to validate on how the source routing protocol manage failures and route recovery.
- Mobility: For protocols such as DSR (which are usually utilized in mobile ad-hoc networks), we can add mobility models to replicate nodes moving and changing routes dynamically.
For example, using a RandomWaypointMobility model:
*.host1.mobility.typename = “RandomWaypointMobility”
*.host1.mobility.speed = uniform(5mps, 10mps)
*.router1.mobility.typename = “StationaryMobility” # Keep the router stationary
Example Scenarios:
- Dynamic Networks: If we need to simulate dynamic networks in which nodes change positions, utilize mobility models.
- Route Discovery Failures: Establish latency or link failures to learn on how source routing protocol adjust.
These project ideas explore various aspects of Route Source Protocol performance, optimization the path and the detailed installation procedures to simulate the Route Source Protocol in OMNeT++ tool. If you’d like more details on any specific project, feel free to ask!
To simulate Route Source Protocol projects utilizing the OMNeT++ tool, we provide the essential tools and resources necessary to complete your work efficiently and on schedule. Collaborate with us to receive expert guidance on protocols such as Dynamic Source Routing (DSR) and other similar source-based protocols. Submit all your research needs to phdprime.com, and we will offer you timely assistance.
