To implement interoperability with 5G in ns3, we need to use the mmWave module. This module allows existing LTE networks to simulate 5G NR (New Radio) functionalities and their integration and also extends the ns3 with support for millimeter wave (mmWave) frequencies used in 5G networks. The following steps will guide on how to implement interoperability 5G in ns3
Step-by-step guide on how to set up a 5G network in ns3
Step 1: Install ns3 with mmWave Module
Make sure that ns3 is installed along with the mmWave module. we can clone the mmWave repository and integrate it with ns3.
# Clone the mmWave module repository
git clone https://github.com/nyuwireless-unipd/ns3-mmwave.git
# Navigate to the ns3 directory
cd ns3-mmwave
# Build the ns3 with the mmWave module
./waf configure
./waf build
Step 2: Set Up the Simulation Environment
Create a new simulation script or modify an existing one. This script will define the network topology, nodes, and communication channels.
Step 3: Define Network Topology
Create nodes and define the network topology, focusing on both gNB (next-generation Node B, or 5G base station) and UEs (User Equipment).
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/mobility-module.h”
#include “ns3/point-to-point-helper.h”
#include “ns3/applications-module.h”
#include “ns3/mmwave-helper.h”
#include “ns3/config-store-module.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE (“5GInteroperabilityExample”);
int main (int argc, char *argv[])
{
// Enable logging
LogComponentEnable (“5GInteroperabilityExample”, LOG_LEVEL_INFO);
// Create nodes
NodeContainer gNbNodes;
gNbNodes.Create (1); // One gNB
NodeContainer ueNodes;
ueNodes.Create (2); // Two UEs
// Set up the mmWave helper
Ptr<mmWaveHelper> mmwaveHelper = CreateObject<mmWaveHelper> ();
// Install the mmWave Devices to the nodes
NetDeviceContainer gNbDevs = mmwaveHelper->InstallEnbDevice (gNbNodes);
NetDeviceContainer ueDevs = mmwaveHelper->InstallUeDevice (ueNodes);
// Install the IP stack on the UEs
InternetStackHelper internet;
internet.Install (ueNodes);
// Assign IP addresses to UEs
Ipv4InterfaceContainer ueIpIface = mmwaveHelper->AssignUeIpv4Address (NetDeviceContainer (ueDevs));
// Attach one UE per gNB
mmwaveHelper->AttachToClosestEnb (ueDevs, gNbDevs);
// Set mobility model
MobilityHelper mobility;
mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);
mobility.Install (gNbNodes);
mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,
“MinX”, DoubleValue (0.0),
“MinY”, DoubleValue (0.0),
“DeltaX”, DoubleValue (5.0),
“DeltaY”, DoubleValue (10.0),
“GridWidth”, UintegerValue (3),
“LayoutType”, StringValue (“RowFirst”));
mobility.SetMobilityModel (“ns3::RandomWalk2dMobilityModel”,
“Bounds”, RectangleValue (Rectangle (0, 50, 0, 50)));
mobility.Install (ueNodes);
// Install and start applications on UEs
uint16_t port = 8080;
ApplicationContainer clientApps, serverApps;
for (uint32_t i = 0; i < ueNodes.GetN (); ++i)
{
UdpClientHelper client (ueIpIface.GetAddress (i), port);
client.SetAttribute (“MaxPackets”, UintegerValue (1000));
client.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));
client.SetAttribute (“PacketSize”, UintegerValue (1024));
clientApps.Add (client.Install (ueNodes.Get (i)));
}
UdpServerHelper server (port);
serverApps = server.Install (ueNodes);
serverApps.Start (Seconds (1.0));
clientApps.Start (Seconds (2.0));
serverApps.Stop (Seconds (10.0));
clientApps.Stop (Seconds (10.0));
// Run the simulation
Simulator::Stop (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Step 4: Set Up Mobility Models
In the example, the ConstantPositionMobilityModel is used for the gNB to keep it stationary, while the RandomWalk2dMobilityModel is used for UEs to simulate movement.
Step 5: Set Up Traffic Generation
We set up a UDP server on each UE and UDP clients on each UE to generate traffic. The traffic configuration can be adjusted to simulate different types of communication.
Step 6: Run the Simulation
Compile and run your simulation script to see the effect of 5G interoperability on network performance. The output will include statistics such as the number of packets transmitted and received, throughput, and any packet loss.
In this above script and example we can clearly understand that how to implement interoperability 5g in ns3 environment by using the mmWave module, setting up the mobility model and traffic generation and running the simulation.
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