How to Start Hot Potato Routing Projects using OMNeT++

To create the Hot Potato Routing (HPR) is a routing method in which the data packets are forwarded as rapidly the possible to next router deprived of seeing the destination. The aim is to “offload” traffic onto the next hop as rapidly the possible and leaving the concern of reaching the final destination to which the next hop. This differences through traditional routing, in which every router chooses the optimize path according to some cost for sample shortest path, lowest latency.

Execute the Hot Potato Routing (HPR) in OMNeT++ contains the building a network topology and setting the routers to transfer the packets rapidly according to particular rules. OMNeT++ offers a flexible environment for replicate the routing methods and we can modify the execution the Hot Potato Routing concept.

Here is a step-by-step guide on how to implement Hot Potato Routing in OMNeT++:

Steps to Start Hot Potato Routing Projects using OMNeT++

Step 1: Install OMNeT++ and INET Framework

Before you start execute the Hot Potato Routing, create sure we have OMNeT++ and the INET Framework installed:

  1. Download and Install OMNeT++:
    • OMNeT++ can be install from the official OMNeT++ website.
    • Follow the installation procedures for the operating system.
  2. Install the INET Framework:
    • INET offers the necessary modules aimed at routing protocols and network replication.
    • Install INET from the OMNeT++ IDE such as using OMNeT++ Module Manager or directly through cloning it from INET GitHub.

Step 2: Create a New OMNeT++ Project for Hot Potato Routing

  1. Create a New OMNeT++ Project:
    • In OMNeT++, build a new project through going to File > New > OMNeT++ Project. Name it something such as HotPotatoRouting.
  2. Design the Network Topology:
    • Build a network topology for your Hot Potato routing replication. The topology should have involved the multiple routers, as Hot Potato Routing relies on forwarding congestion to the next router as quickly possible.
    • In this network, the routers should not necessarily select the minimum or optimize the path nevertheless instead transmit the packets as quickly as possible.

Here’s a sample for a simple network topology in which routers transmit packets deprived of considering the destination such as Hot Potato Routing style:

network HotPotatoRoutingNetwork {

submodules:

router1: Router;

router2: Router;

router3: Router;

host1: Host;

host2: Host;

connections:

host1.ethg++ <–> EthernetInterface <–> router1.ethg++;

router1.ethg++ <–> EthernetInterface <–> router2.ethg++;

router2.ethg++ <–> EthernetInterface <–> router3.ethg++;

router3.ethg++ <–> EthernetInterface <–> host2.ethg++;

}

In this example:

  • The host1 transmit the packets to host2.
  • The packets pass complete router1, router2, and router3.
  • Every router will transmit the packet to the next router as rapidly it arrives the replicating the Hot Potato Routing.

Step 3: Implement Hot Potato Routing Logic in Router Modules

To execute the Hot Potato Routing, we require to modify the routers so which they forward packets as quickly as possible. Basically, the router will pass the packet to the next router deprived of seeing the best route or destination.

We can alter the routing behaviour through encompass the cSimpleModule in OMNeT++ and execution the logic that transfer the packets nearly. Here’s how we can describe the routing logic for Hot Potato Routing.

  1. Create a Custom Router Module:
    • Build a alter the Router module which will transfer the packets as quickly they reach.

Sample code for a modify the router which executes the Hot Potato Routing:

class HotPotatoRouter : public cSimpleModule {

protected:

virtual void initialize() override {

// Router initialization (if needed)

}

virtual void handleMessage(cMessage *msg) override {

// Immediately forward the message to the next hop

// Assuming only one output gate

send(msg, “out”);

}

};

In this example:

  • After a packet reach the router, the handleMessage function are triggered.
  • The router nearly transfer the packet to the next hop such as the next connected router or destination using send(msg, “out”).
  1. Add the Router to the Network Topology:
    • In your .ned file, change the default router through your modification for HotPotatoRouter.

Example:

network HotPotatoRoutingNetwork {

submodules:

router1: HotPotatoRouter;  // Custom Hot Potato Router

router2: HotPotatoRouter;

router3: HotPotatoRouter;

host1: Host;

host2: Host;

connections:

host1.ethg++ <–> EthernetInterface <–> router1.ethg++;

router1.ethg++ <–> EthernetInterface <–> router2.ethg++;

router2.ethg++ <–> EthernetInterface <–> router3.ethg++;

router3.ethg++ <–> EthernetInterface <–> host2.ethg++;

}

Step 4: Configure the Simulation in omnetpp.ini

In the omnetpp.ini file, you will be setting the network set up, congestion generation, and routing parameters. For Hot Potato Routing, we require to state the congestion among the hosts and assure that routers observe the Hot Potato behaviour for sample forwarding without delay.

  1. Basic Configuration:
    • Setting the replication for process a particular duration, build a traffic among hosts, and ensure your modify router modules.

Example omnetpp.ini configuration:

[General]

network = HotPotatoRoutingNetwork

sim-time-limit = 100s

[Config HotPotato]

*.router1.routingProtocol = “HotPotatoRouter”

*.router2.routingProtocol = “HotPotatoRouter”

*.router3.routingProtocol = “HotPotatoRouter”

# Traffic generation configuration

*.host1.app[0].typename = “PingApp”

*.host1.app[0].destAddr = “host2”

*.host1.app[0].startTime = 1s

*.host1.app[0].messageLength = 64B

*.host1.app[0].numMessages = 10

In this example:

  • We used PingApp to create the congestion among host1 and host2. We can also use the UDP or TCP applications depending on your requirement.
  • The routingProtocol parameter is setting to HotPotatoRouter for every router in the network.
  1. Define Custom Parameters (Optional):
    • We can add additional parameters metrices, like as the number of packets, delay among packets, or logging configurations.

Step 5: Run the Simulation

  1. Compile and Build the Project:
    • Create we OMNeT++ project through clicking Build in the OMNeT++ IDE. This can be compiling the code and assure there are no errors.
  2. Run the Simulation:
    • Process the replication used their Tkenv or Qtenv. The replication will display on how the packets are routed with the network according to the Hot Potato strategy.
  3. Observe Packet Forwarding:
    • We can use the EV logging we follow on how the routers are transmitting the packets as quickly they reach. We should show which every router forwards the packet to the ensuing router without waiting for the destination.

Example of logging within the HotPotatoRouter:

EV << “Router ” << getId() << ” forwarding packet to next hop.” << endl;

send(msg, “out”);

  1. Analyze Results:
    • Used their outcomes OMNeT++’s statistics and output logging we examine on how the packets are forwarded and how much time they spend in the network. This will support we follow the effectiveness for the Hot Potato Routing in various network environment.

Step 6: Extend and Optimize

Once we have executed the basic Hot Potato Routing, we can improve the replication through adding further features:

  1. Simulate Network Failures:
    • Establish the connection failures to display on how the routers react when they lose their connections. The routers should still transfer the packets deprived of delay, even if the connection goes down.
  2. Extend the Topology:
    • Enhance the further routers and hosts to replicate the larger networks. This will support you understand on how the Hot Potato strategy works in additional complex topologies.
  3. Custom Forwarding Rules:
    • Alter the router behaviour we involve the further modification rules such as forward based on some conditions, not just as quickly as possible.
  4. Traffic Load and Performance Analysis:
    • Used the congestion load for OMNeT++’s statistical tools to examine on how Hot Potato Routing effect for network performance, has involves the throughput, packet delivery time, and congestion.

To implement Hot Potato Routing (HPR) in OMNeT++, we require to build a network topology, build a alter router module that transmit packets immediately to the next hop, and setting the replication to build a traffic between hosts. The routers will forward packets as quickly as possible deprived of considering the destination, replicating the Hot Potato behaviour. Once the basic functionality is set up, you can further analyse performance, replicate the connection failures, and enhance the replication for more complex network scenarios. Any uncertainties about the project will be addressed in a follow-up manual.

Just share the information about your Hot Potato Routing Project with us, and we at phdprojects.org will give you excellent support. Join our research team! You can chill and not worry about the tough research and writing work because we’ll handle it for you.