How to Implement spin protocol in OMNeT++
To implement the Sensor Protocols for Information via Negotiation (SPIN) protocol in OMNeT++ has includes to familiarize the operation, setup the OMNeT++ and INET framework scenario then generating the essential modules that incorporates them into the INET framework, and validated. Connect with us for best project performance and simulation results.
The given below are the detailed procedures on how to implement the spin protocol in OMNeT++ tool:
Step-by-Step Implementation:
Here’s a detailed guide to help you implement SPIN in OMNeT++ using the INET framework.
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Download and install the latest version of OMNeT++ from the OMNeT++
- Install INET Framework: Download and install the INET framework from the INET repository.
Step 2: Understand SPIN Protocol
The SPIN is a family of adaptive protocols that planned to effectively distribute information in sensor networks. The protocol uses metadata negotiation to eradicate redundant data transmissions and save energy. Key messages in SPIN include:
- ADV (Advertisement): Advertises new data.
- REQ (Request): Requests specific data.
- DATA: Carries the actual data.
Step 3: Create the SPIN Protocol Module
Define the Module in .ned File
Create a .ned file for the SPIN protocol module.
simple SPIN
{
parameters:
@display(“i=block/cogwheel”);
double advInterval @unit(s) = default(1s);
gates:
input fromNetworkLayer;
output toNetworkLayer;
input fromMacLayer;
output toMacLayer;
}
Implement the Module in C++
Create the corresponding .cc and .h files.
SPIN.h
#ifndef __SPIN_H_
#define __SPIN_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/common/INETDefs.h”
#include <map>
#include <set>
using namespace omnetpp;
using namespace inet;
class SPIN : public cSimpleModule
{
private:
double advInterval;
cMessage *advMsg;
std::set<std::string> dataItems; // Set of data items available at this node
std::set<std::string> requestedItems; // Set of data items requested by this node
std::map<std::string, cMessage*> pendingRequests; // Pending data requests
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void sendAdvertisement();
void processAdvertisement(cMessage *msg);
void sendRequest(const std::string& dataItem);
void processRequest(cMessage *msg);
void sendData(const std::string& dataItem);
void processData(cMessage *msg);
public:
SPIN();
virtual ~SPIN();
};
#endif
SPIN.cc
#include “SPIN.h”
Define_Module(SPIN);
SPIN::SPIN()
{
advMsg = nullptr;
}
SPIN::~SPIN()
{
cancelAndDelete(advMsg);
}
void SPIN::initialize()
{
advInterval = par(“advInterval”);
advMsg = new cMessage(“sendAdvertisement”);
scheduleAt(simTime() + advInterval, advMsg);
}
void SPIN::handleMessage(cMessage *msg)
{
if (msg == advMsg)
{
sendAdvertisement();
scheduleAt(simTime() + advInterval, advMsg);
}
else if (strcmp(msg->getName(), “ADV”) == 0)
{
processAdvertisement(msg);
}
else if (strcmp(msg->getName(), “REQ”) == 0)
{
processRequest(msg);
}
else if (strcmp(msg->getName(), “DATA”) == 0)
{
processData(msg);
}
else
{
// Handle other messages
}
}
void SPIN::sendAdvertisement()
{
cMessage *adv = new cMessage(“ADV”);
// Add metadata (e.g., dataItem) to the advertisement message
for (const std::string& dataItem : dataItems)
{
adv->addPar(“dataItem”) = dataItem.c_str();
}
send(adv, “toMacLayer”);
}
void SPIN::processAdvertisement(cMessage *msg)
{
// Process received advertisement message
std::string dataItem = msg->par(“dataItem”).stringValue();
if (dataItems.find(dataItem) == dataItems.end() && requestedItems.find(dataItem) == requestedItems.end())
{
sendRequest(dataItem);
}
delete msg;
}
void SPIN::sendRequest(const std::string& dataItem)
{
cMessage *req = new cMessage(“REQ”);
req->addPar(“dataItem”) = dataItem.c_str();
send(req, “toMacLayer”);
pendingRequests[dataItem] = req;
}
void SPIN::processRequest(cMessage *msg)
{
// Process received request message
std::string dataItem = msg->par(“dataItem”).stringValue();
if (dataItems.find(dataItem) != dataItems.end())
{
sendData(dataItem);
}
delete msg;
}
void SPIN::sendData(const std::string& dataItem)
{
cMessage *data = new cMessage(“DATA”);
data->addPar(“dataItem”) = dataItem.c_str();
send(data, “toMacLayer”);
}
void SPIN::processData(cMessage *msg)
{
// Process received data message
std::string dataItem = msg->par(“dataItem”).stringValue();
dataItems.insert(dataItem);
auto it = pendingRequests.find(dataItem);
if (it != pendingRequests.end())
{
cancelAndDelete(it->second);
pendingRequests.erase(it);
}
delete msg;
}
Step 4: Integrate with Simulation Model
Incorporate SPIN module into a network simulation model.
Network Configuration .ned File
network SPINNetwork
{
submodules:
node1: StandardHost {
parameters:
@display(“p=100,100”);
}
node2: StandardHost {
parameters:
@display(“p=300,100”);
}
// Add more nodes as needed
connections:
node1.pppg++ <–> { @display(“m=100,100”); } <–> node2.pppg++;
}
omnetpp.ini Configuration
network = SPINNetwork
*.node*.pppg[*].queue.typename = “DropTailQueue”
*.node*.ipv4.routingTable = “inet.networklayer.routing.manet.Router”
*.node*.networkLayer.networkProtocol.typename = “IPv4NetworkLayer”
*.node*.transportLayer.tcp.typename = “Tcp”
*.node*.transportLayer.udp.typename = “Udp”
*.node*.application[*].typename = “UdpBasicApp”
*.node*.application[*].destAddresses = “node1” // Set destination as needed
*.node*.application[*].destPort = 2000
*.node*.application[*].startTime = uniform(0s, 10s)
*.node*.application[*].sendInterval = uniform(1s, 2s)
*.node*.application[*].packetLength = 512B
*.node*.app[0].typename = “SPIN”
Step 5: Test and Debug
- Run Simulations: Implement the simulations to evaluate the features of SPIN module under numerous network conditions.
- Analyze Results: Verify the correctness and performance of implementation.
- Debugging: Use OMNeT++’s debugging tools to troubleshoot any challenges.
In the end, we demonstrate how the spin protocol will generate the essential module and how it integrates the INET framework to execute the simulation using the OMNeT++ tool. More information will be shared about the spin protocol.