How to Calculate Network Achievable sum rate in ns3

To calculate the network achievable sum rate in ns3 can be computed by total of throughput of all UEs in the network. It includes measuring the total data rate that can be attained by all user equipment (UE) in the network. The Metrics for computing the performance of cellular networks, like LTE or 5G.

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Below are the procedures to compute the Network Achievable Sum Rate in ns3

Step-by-Step Guide to Calculate Network Achievable Sum Rate in ns3

1. Set Up the Simulation Environment:
   • Make sure ns3 is installed in the computer.
   • Download all the necessary modules in the simulation.(e.g., LTE, EPC, Internet).
2. Create Network Topology:
   • Define nodes for the eNodeBs (base stations) and UEs.
   • Set up the cellular network with appropriate configurations.
3. Configure Applications:
   • Install traffic generating applications (e.g., UDP, TCP) on the UEs.
4. Enable Tracing and Metrics Collection:
   • Permit tracing to capture relevant metrics such as throughput for each UE.
5. Run the Simulation:
   • Perform the simulation and gather the trace data.
6. Analyze the Results:
   • Post-process the trace data to calculate the achievable sum rate for the network.

Example Code Snippet

Here is the sample on how to set up the LTE network, generate traffic, and compute the achievable sum rate for the network:

#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/lte-module.h”

#include “ns3/epc-helper.h”

#include “ns3/mobility-module.h”

#include “ns3/flow-monitor-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“LteAchievableSumRateExample”);

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

{

// Set up logging

LogComponentEnable (“UdpClient”, LOG_LEVEL_INFO);

LogComponentEnable (“UdpServer”, LOG_LEVEL_INFO);

// Create LTE network nodes

NodeContainer ueNodes;

NodeContainer enbNodes;

ueNodes.Create (10);

enbNodes.Create (3);

// Install Mobility model

MobilityHelper mobility;

mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);

mobility.Install (enbNodes);

mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,

“MinX”, DoubleValue (0.0),

“MinY”, DoubleValue (0.0),

“DeltaX”, DoubleValue (50.0),

“DeltaY”, DoubleValue (50.0),

“GridWidth”, UintegerValue (3),

“LayoutType”, StringValue (“RowFirst”));

mobility.Install (ueNodes);

// Create LTE helper and EPC helper

Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();

Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();

lteHelper->SetEpcHelper (epcHelper);

// Install LTE devices to the nodes

NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice (enbNodes);

NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice (ueNodes);

// Install Internet stack on UEs

InternetStackHelper internet;

internet.Install (ueNodes);

// Assign IP addresses to UEs

Ipv4InterfaceContainer ueIpIface;

ueIpIface = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevs));

// Attach UEs to eNodeBs

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

{

lteHelper->Attach (ueLteDevs.Get (i), enbLteDevs.Get (i % enbNodes.GetN ()));

}

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

ApplicationContainer clientApps;

ApplicationContainer serverApps;

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

{

UdpServerHelper myServer (dlPort);

serverApps.Add (myServer.Install (ueNodes.Get (i)));

UdpClientHelper myClient (ueIpIface.GetAddress (i), dlPort);

myClient.SetAttribute (“MaxPackets”, UintegerValue (1000));

myClient.SetAttribute (“Interval”, TimeValue (MilliSeconds (100)));

myClient.SetAttribute (“PacketSize”, UintegerValue (1024));

clientApps.Add (myClient.Install (ueNodes.Get (i)));

}

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

// Set up FlowMonitor to collect performance metrics

FlowMonitorHelper flowmon;

Ptr<FlowMonitor> monitor = flowmon.InstallAll ();

// Run the simulation

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

// Calculate achievable sum rate for the network

monitor->CheckForLostPackets ();

Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier> (flowmon.GetClassifier ());

std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();

double totalThroughput = 0.0; // Sum rate

for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)

{

double throughput = i->second.rxBytes * 8.0 /

(i->second.timeLastRxPacket.GetSeconds () – i->second.timeFirstRxPacket.GetSeconds ()) / 1000 / 1000;

totalThroughput += throughput;

}

NS_LOG_UNCOND (“Network Achievable Sum Rate: ” << totalThroughput << ” Mbps”);

// Clean up

Simulator::Destroy ();

return 0;

}

Explanation:

Here, we are provided the brief explanation for Network Achievable sum rate in ns3:

1. Setup Logging:
   • Enable logging for the UDP applications to track their activities.
2. Create Nodes and Network:
   • Create nodes representing UEs and eNodeBs.
   • Configure mobility models for UEs and eNodeBs.
3. Install LTE and EPC Helper:
   • Create and configure LTE and EPC helpers.
   • Install LTE devices on the UEs and eNodeBs.
4. Install Internet Stack:
   • Install the Internet stack on UEs.
   • Assign IP addresses to the UEs.
5. Attach UEs to eNodeBs:
   • Attach each UE to an eNodeB. Here, a round-robin attachment is used for simplicity.
6. Install Applications:
   • Install UDP server applications on the UEs.
   • Install UDP client applications on the UEs, sending traffic to the server.
7. Flow Monitor:
   • Set up a FlowMonitor to collect and analyze flow statistics.
8. Run Simulation:
   • Run the simulation for the specified duration.
9. Calculate Achievable Sum Rate:
   • After the simulation, extract the flow statistics.
   • Calculate the throughput for each flow and sum the throughput for the entire network to get the achievable sum rate.

Analysing the Results:

• Achievable Sum Rate:
  • The achievable sum rate for the network is calculated by summing the throughput of all UEs.
  • The throughput is calculated using the received bytes over time.

The Network Achievable sum rate can be computed by total of throughput of all UEs in the network incorporated with ns3. Then we help and share further insights about how the Network Achievable sum rate will perform in other simulated tools.