To implement the network path prediction in ns3 has needs to generate the mechanism, based on the current network criteria and the historical data we expect the prospect path of packets. The given below is the detailed procedure on how to implement the network path prediction in ns3:
Step-by-Step Implementation:
Step 1: Set Up the ns3 Environment
- Install ns3: Make sure ns3 is installed in the computer.
sudo apt-get update
sudo apt-get install ns3
Create a New ns3 Project: Create a directory for your new project within the ns3 workspace.
cd ns-3
mkdir scratch/path-prediction-project
Step 2: Choose a Routing Protocol
To use dynamic routing protocols like AODV, DSR, or OLSR. Here, we will use AODV as an example for path prediction,
Step 3: Implement the Simulation Script
- Create a New Simulation Script: Create a new script in your scratch directory to implement the simulation scenario.
// path-prediction-project.cc
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
#include “ns3/mobility-module.h”
#include “ns3/aodv-module.h”
#include “ns3/ipv4-routing-table-entry.h”
using namespace ns3;
void PrintRoutingTable(Ptr<Node> node) {
Ptr<Ipv4> ipv4 = node->GetObject<Ipv4>();
Ptr<Ipv4RoutingTableEntry> route;
std::cout << “Routing table for node ” << node->GetId() << “:\n”;
for (uint32_t i = 0; i < ipv4->GetNInterfaces(); ++i) {
for (uint32_t j = 0; j < ipv4->GetNAddresses(i); ++j) {
Ipv4Address addr = ipv4->GetAddress(i, j).GetLocal();
std::cout << “Interface ” << i << ” address: ” << addr << “\n”;
}
}
Ptr<Ipv4RoutingProtocol> rp = ipv4->GetRoutingProtocol();
Ptr<aodv::RoutingProtocol> aodv = DynamicCast<aodv::RoutingProtocol>(rp);
if (aodv) {
std::cout << “AODV Routing Table:\n”;
aodv->PrintRoutingTable(std::cout);
}
}
void PathPrediction(Ptr<Node> node) {
// Implement path prediction logic here
PrintRoutingTable(node);
// Example: Predict path based on current routing table
Ptr<Ipv4> ipv4 = node->GetObject<Ipv4>();
Ptr<Ipv4RoutingProtocol> rp = ipv4->GetRoutingProtocol();
Ptr<aodv::RoutingProtocol> aodv = DynamicCast<aodv::RoutingProtocol>(rp);
if (aodv) {
std::map<Ipv4Address, aodv::RoutingTableEntry> rt;
aodv->GetRoutingTable(rt);
for (auto it = rt.begin(); it != rt.end(); ++it) {
Ipv4Address dest = it->first;
aodv::RoutingTableEntry entry = it->second;
// Example prediction logic: Log predicted path for a specific destination
std::cout << “Predicted path to ” << dest << “: “;
for (uint32_t i = 0; i < entry.GetHop(); ++i) {
std::cout << entry.GetNextHop() << ” -> “;
}
std::cout << dest << “\n”;
}
}
}
void SchedulePathPredictions(NodeContainer nodes) {
for (uint32_t i = 0; i < nodes.GetN(); ++i) {
Simulator::Schedule(Seconds(10.0), &PathPrediction, nodes.Get(i));
}
}
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(4);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes);
InternetStackHelper stack;
AodvHelper aodv;
stack.SetRoutingHelper(aodv);
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
// Create traffic source and sink
UdpEchoServerHelper echoServer(9);
ApplicationContainer serverApps = echoServer.Install(nodes.Get(1));
serverApps.Start(Seconds(1.0));
serverApps.Stop(Seconds(20.0));
UdpEchoClientHelper echoClient(interfaces.GetAddress(1), 9);
echoClient.SetAttribute(“MaxPackets”, UintegerValue(100));
echoClient.SetAttribute(“Interval”, TimeValue(Seconds(1.0)));
echoClient.SetAttribute(“PacketSize”, UintegerValue(1024));
ApplicationContainer clientApps = echoClient.Install(nodes.Get(0));
clientApps.Start(Seconds(2.0));
clientApps.Stop(Seconds(20.0));
// Enable pcap tracing
pointToPoint.EnablePcapAll(“path-prediction”);
// Schedule path predictions
SchedulePathPredictions(nodes);
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Compile the Script: Compile your script using the waf build system.
./waf build
Run the Simulation: Run your simulation script and observe the results.
./waf –run scratch/path-prediction-project
Step 4: Implement Path Prediction Logic
- Define Path Prediction Function: Generate a function that executes the logic for predicting paths. This can be based on numerous metrics like link quality, traffic load, or historical routing data.
- Integrate with ns3 Events: To periodically check network conditions and predict paths accordingly we need to use ns3 event scheduler.
Additional Tips:
- Custom Metrics: Implement custom metrics for path prediction based on your specific requirements.
- Dynamic Adjustments: Guarantee that your path prediction logic dynamically responds to changing network conditions.
- Documentation: Keep your code well-documented to ensure clarity and ease of maintenance.
Example: Dynamic Path Prediction
You can enhance the PathPrediction function to predict paths based on specific conditions.
void PathPrediction(Ptr<Node> node) {
PrintRoutingTable(node);
Ptr<Ipv4> ipv4 = node->GetObject<Ipv4>();
Ptr<Ipv4RoutingProtocol> rp = ipv4->GetRoutingProtocol();
Ptr<aodv::RoutingProtocol> aodv = DynamicCast<aodv::RoutingProtocol>(rp);
if (aodv) {
// Example prediction logic: Predict future paths based on current routing table
std::map<Ipv4Address, aodv::RoutingTableEntry> rt;
aodv->GetRoutingTable(rt);
for (auto it = rt.begin(); it != rt.end(); ++it) {
Ipv4Address dest = it->first;
aodv::RoutingTableEntry entry = it->second;
// Example: Log predicted path for a specific destination
std::cout << “Predicted path to ” << dest << “: “;
for (uint32_t i = 0; i < entry.GetHop(); ++i) {
std::cout << entry.GetNextHop() << ” -> “;
}
std::cout << dest << “\n”;
}
}
}
In the whole, we understand the procedures, sample snippets to perform the network path prediction using the ns3 that has creates the function and observe the results for path prediction and further we support and provide the additional information related to the network path prediction.
Explore project ideas and performance analysis for network Path Prediction in ns3tool. We offer a range of project ideas for your consideration, along with detailed implementation plans. Our projects are based on current network standards and historical data, all developed using ns3tool.