How to Calculate Network Node degree in ns3

To calculate node degree in ns3, we have to determine the number of direct connections (edges) each node has with other nodes. In network topology analysis, this is a fundamental metric and is useful in understanding the structure and connectivity of the network. Here is the quick guide on calculating network node degree in ns3.

Steps for calculating network node degree

1. Set up the simulation :

• Make sure that ns3 is installed in the computer. If not, install it and include necessary modules.

2. Define Network Topology:

• create the network topology by incorporating nodes and links.

3. Calculate Node Degree:

• To iterate over the network topology and count the number of direct connections each node has, Implement a method.

Example code

Here is an example to set up a basic simulation to calculate the node degree for each node in a point-to-point network in ns3.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/netanim-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NodeDegreeExample”);

void CalculateNodeDegree (NodeContainer nodes, NetDeviceContainer devices)

{

std::vector<int> nodeDegree (nodes.GetN (), 0);

for (NetDeviceContainer::Iterator it = devices.Begin (); it != devices.End (); ++it)

{

Ptr<NetDevice> device = *it;

Ptr<PointToPointNetDevice> p2pDevice = DynamicCast<PointToPointNetDevice> (device);

if (p2pDevice)

{

Ptr<Node> node = device->GetNode ();

nodeDegree[node->GetId ()]++;

}

}

for (uint32_t i = 0; i < nodes.GetN (); ++i)

{

NS_LOG_UNCOND (“Node ” << i << ” has degree ” << nodeDegree[i]);

}

}

int main (int argc, char *argv[])

{

CommandLine cmd;

cmd.Parse (argc, argv);

Time::SetResolution (Time::NS);

NodeContainer nodes;

nodes.Create (6);

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));

pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));

NetDeviceContainer devices;

// Create a star topology

for (uint32_t i = 1; i < nodes.GetN (); ++i)

{

NetDeviceContainer linkDevices = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (i)));

devices.Add (linkDevices);

}

InternetStackHelper stack;

stack.Install (nodes);

Ipv4AddressHelper address;

address.SetBase (“10.1.1.0”, “255.255.255.0”);

address.Assign (devices);

Simulator::Stop (Seconds (1.0));

Simulator::Run ();

CalculateNodeDegree (nodes, devices);

Simulator::Destroy ();

return 0;

}

Explanation

1. Setup:

Created one central node and several peripheral nodes for setting up a simple star topology network.

1. Devices:

To connect the nodes, Point-to-Point links are used.

1. CalculateNodeDegree Function:

By iterating over the devices and counting the number of connections each node has, this function calculates the degree of each node.

1. Node Degree Calculation:

The node degree for each node is printed to the console.

Running the Simulation

Compile and run the simulation using the following commands:

./waf configure

./waf build

./waf –run your-script-name

Replace your-script-name with the actual name of your script file.

On the whole we had a performance analysis on calculating network node degree in ns3 by determining the number of direct connections each node has with other nodes. Also, we provide more related content on Network Node Degree.Tell us all the details about your parameters so we can help you calculate the time it takes for a network node in an ns3 simulation. If you want to learn more about analyzing your network’s structure and connections, trust our experts to deliver top-notch project results.