To implement the network route readjustment in ns3 needs to generate a mechanism and then it regulates the routing decision enthusiastically based on their network criteria. Explore project ideas and performance evaluation for Network Route Readjustment in the ns3 tool. Project concepts and thorough comparative analysis are offered by us to bring your ideas to life with detailed execution.
The below is the structured procedure on how to implement the network route readjustments in ns3:
Step-by-Step Implementation:
Step 1: Set Up the ns3 Environment
- Install ns3: Make sure ns3 is installed in the system.
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/route-readjustment-project
Step 2: Choose a Routing Protocol
To use dynamic routing protocols like AODV, DSR, or OLSR for route readjustment. Here, we will use AODV as an example.
Step 3: Implement the Simulation Script
- Create a New Simulation Script: Create a new script in your scratch directory to implement the simulation scenario.
// route-readjustment-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 AdjustRoutes(Ptr<Node> node) {
// Example of route adjustment logic: print routing table and potentially modify routes
PrintRoutingTable(node);
// Implement any specific logic for route readjustment here
// For instance, you can remove/add routes based on specific conditions
}
void ScheduleRouteAdjustments(NodeContainer nodes) {
for (uint32_t i = 0; i < nodes.GetN(); ++i) {
Simulator::Schedule(Seconds(10.0), &AdjustRoutes, 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(“route-readjustment”);
// Schedule route adjustments
ScheduleRouteAdjustments(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/route-readjustment-project
Step 4: Implement Route Adjustment Logic
- Define Route Adjustment Function: Create a function that implements the logic for adjusting routes. This can be based on various metrics such as link quality, traffic load, or node energy levels.
- Integrate with ns3 Events: To occasionally check network criteria and adjust routes accordingly by use of ns3 event scheduler.
Additional Tips:
- Custom Metrics: For route adjustment based on your specific requirements execute custom metrics.
- Dynamic Adjustments: Ensure that your route adjustment logic dynamically responds to changing network conditions.
- Documentation: To safeguard clarity and ease of maintenance retain your code well-documented.
Example: Dynamic Route Adjustment
You can enhance the AdjustRoutes function to modify the routing table based on specific conditions. For example, you can remove routes with high delay or low throughput.
void AdjustRoutes(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) {
// Iterate through routing table and adjust routes based on custom conditions
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 condition: remove route if hop count is greater than 5
if (entry.GetHop() > 5) {
aodv->InvalidateRoute(dest);
std::cout << “Invalidating route to ” << dest << ” due to high hop count.\n”;
}
}
}
}
In this script, we had completed learn and understand about how the network route readjustment will successfully implemented and evaluated in ns3 tool. Also we provide the further support related to network route readjustment.