How to implement XY routing in OMNeT++
To implement the XY routing in OMNeT++ has needs to follow several steps and the XY routing is also defined as dimension-order routing, is a deterministic routing algorithm frequently used in network-on-chip (NoC) designs and mesh networks. In XY routing that packets are routed first beside the X-axis (horizontal direction) and then along the Y-axis (vertical direction) to reach their endpoint. This technique is simple, loop-free, and effective in grid or mesh network topologies. The given below are the procedures to implement XY routing in OMNeT++ using the INET framework:
Step-by-Step Implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++:
- Make sure OMNeT++ is installed on system. We need download it from the OMNeT++
- Install the INET Framework:
- Download and install the INET Framework, which delivers numerous networking protocols and models. INET can be downloaded from the INET GitHub repository.
Step 2: Create a New OMNeT++ Project
- Create the Project:
- Open OMNeT++ and generate a new OMNeT++ project through File > New > OMNeT++ Project.
- Name the project such as XYRoutingSimulation and set up the project directory.
- Set Up Project Dependencies:
- Make sure the project references of the INET Framework by right-clicking on project in the Project Explorer, navigating to Properties > Project References, and verifying the INET project.
Step 3: Define the Network Topology
- Create a NED File:
- To describe network topology use of the NED language. This topology should contains the routers to organized in a grid or mesh structure, with hosts connected to these routers.
Example:
network XYRoutingNetwork
{
submodules:
router[3][3]: Router {
@display(“p=100,200;i=block/routing”);
}
host[4]: StandardHost {
@display(“p=50,350;i=block/host”);
}
connections allowunconnected:
// Connect routers in a 3×3 grid
for i=0..2 for j=0..1 {
router[i][j].ethg++ <–> Eth10Mbps <–> router[i][j+1].ethg++;
}
for i=0..1 for j=0..2 {
router[i][j].ethg++ <–> Eth10Mbps <–> router[i+1][j].ethg++;
}
// Connect hosts to routers
host[0].ethg++ <–> Eth10Mbps <–> router[0][0].ethg++;
host[1].ethg++ <–> Eth10Mbps <–> router[2][0].ethg++;
host[2].ethg++ <–> Eth10Mbps <–> router[0][2].ethg++;
host[3].ethg++ <–> Eth10Mbps <–> router[2][2].ethg++;
}
- Configure Network Parameters:
- To mimic a realistic network environment set up necessary link parameters like bandwidth, delay, and packet loss.
Step 4: Implement the XY Routing Protocol
- Define the XY Routing Module:
- Generate a new module in NED for the XY routing algorithm. This module will manage the routing of packets along the X and Y axes.
Example (in NED):
simple XYRouting
{
parameters:
@display(“i=block/routing”);
gates:
inout lowerLayerIn[];
inout lowerLayerOut[];
}
- Implement XY Routing Logic in C++:
- To execute the routing logic in C++ that forwards packets first along the X-axis and then along the Y-axis to the accurate terminus point.
Example (C++ implementation):
#include “inet/common/INETDefs.h”
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/ipv4/IPv4RoutingTable.h”
#include “inet/networklayer/ipv4/IPv4Route.h”
#include “inet/networklayer/common/L3Address.h”
class XYRouting : public cSimpleModule
{
private:
IRoutingTable *inetRoutingTable;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void forwardPacket(cPacket *packet, const L3Address& destAddr);
int getXCoordinate(const L3Address& address);
int getYCoordinate(const L3Address& address);
};
Define_Module(XYRouting);
void XYRouting::initialize() {
inetRoutingTable = getModuleFromPar<IRoutingTable>(par(“routingTableModule”), this);
}
void XYRouting::handleMessage(cMessage *msg) {
cPacket *packet = check_and_cast<cPacket *>(msg);
L3Address destAddr = packet->getContextPointer(); // Assuming the packet contains the destination address in its context
forwardPacket(packet, destAddr);
}
void XYRouting::forwardPacket(cPacket *packet, const L3Address& destAddr) {
int destX = getXCoordinate(destAddr);
int destY = getYCoordinate(destAddr);
int currentX = getXCoordinate(inetRoutingTable->getRouterId());
int currentY = getYCoordinate(inetRoutingTable->getRouterId());
if (currentX != destX) {
// Forward along X-axis
if (destX > currentX) {
send(packet, “lowerLayerOut”, 1); // Assuming port 1 is to the right
} else {
send(packet, “lowerLayerOut”, 0); // Assuming port 0 is to the left
}
} else if (currentY != destY) {
// Forward along Y-axis
if (destY > currentY) {
send(packet, “lowerLayerOut”, 3); // Assuming port 3 is up
} else {
send(packet, “lowerLayerOut”, 2); // Assuming port 2 is down
}
} else {
// Packet has reached its destination router
send(packet, “lowerLayerOut”, 4); // Forward to the final destination host
}
}
int XYRouting::getXCoordinate(const L3Address& address) {
// Extract the X-coordinate from the address
// This is a simplified example; in a real scenario, you would map the address to coordinates
return (address.toIPv4().getDByte(2) >> 4) & 0x0F;
}
int XYRouting::getYCoordinate(const L3Address& address) {
// Extract the Y-coordinate from the address
// This is a simplified example; in a real scenario, you would map the address to coordinates
return address.toIPv4().getDByte(2) & 0x0F;
}
-
- X and Y Coordinates: The getXCoordinate and getYCoordinate functions regulate the X and Y coordinates of the terminus based on its IP address. This sample shows that the IP address can be mapped to coordinates, which may need a custom mapping in a real-world scenario.
- Routing Logic: The forwardPacket function first validates if the packet should be routed along the X-axis or the Y-axis, and forwards the packet respectively.
Step 5: Set Up the Simulation
- Configure the Simulation in omnetpp.ini:
- Set up the simulation parameters like simulation time, network settings, and traffic patterns.
Example:
network = XYRoutingNetwork
sim-time-limit = 100s
**.scalar-recording = true
**.vector-recording = true
# Configure routing protocol for routers
**.router*.ipv4.routingTable.routingProtocol = “XYRouting”
- Traffic Configuration:
- Configure the traffic patterns like UDP or TCP applications running on the hosts, to create network activity and validate the XY routing.
Step 6: Run the Simulation
- Compile the Project:
- Make sure everything is correctly applied and compiled.
- Run Simulations:
- Implement the simulations using OMNeT++’s IDE or command line. Monitor how XY routing directs packets across the network according to the predefined routes.
Step 7: Analyse the Results
- Monitor Routing Behaviour:
- We implement the XY routing logic according to how the packets routes are evaluated. Validate that all routers are ensuing the XY routing paths as planned.
- Evaluate Performance:
- Measure the key performance metrics like packet delivery ratio, end-to-end delay, and the effectiveness of the routing paths.
- Scalars and Vectors: Use OMNeT++ tools to record and evaluate scalar and vector data, like the number of packets sent, received, and dropped, besides the time taken to deliver packets.
- Check for Issues:
- Look for challenges like routing loops, packet loss, or excessive delay that may designate issues with the XY routing implementation.
Step 8: Refine and Optimize the Implementation
- Address Any Issues:
- Regulate the XY routing techniques or network configuration based on the simulation outcomes to improve performance.
- Re-Test:
- To validate improvements run the model again with the enhanced configuration.
In the end, we will understand and get knowledge about how to setup the network topology and it arranged in mesh network and configure it essential parameter to implement the XY routing in OMNeT++ tool in C++ language. We have implemented XY routing in the OMNeT++ simulator tool; send us the details of your project, and we will provide you with the best simulation outcomes. You can get the best project execution support from omnet-manual.com. Get in touch with us to discuss project ideas as we employ all the cutting-edge online tool techniques.