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How To Implement Cloud Ran in NS3

Cloud radio access network (Cloud RAN or C-RAN) implementation in ns-3 contains to simulate a network where the baseband units (BBU) are unified in a cloud data center and are linked to remote radio heads (RRHs) through high speeds, low latency fronthaul links. For anytype of implementation in Cloud Ran in NS-3 you can contact us. Here is a procedure to set up a basic C-RAN simulation in ns-3:

Step-by-Step Guide to Implement Cloud RAN in ns-3

  1. Set Up Your Development Environment
  1. Install ns-3:
    • Follow the official ns-3 installation guide.
  2. Install mmWave Module:
    • Clone and install the mmWave module from its repository, as it provides necessary features for 5G simulations which are often used in C-RAN.

# Clone mmWave module

git clone https://github.com/nyuwireless-unipd/ns3-mmwave.git

cd ns3-mmwave

./waf configure –enable-examples –enable-tests

./waf build

  1. Create a Basic Cloud RAN Simulation Script

Here is a sample script to setup a basic C-RAN environments using ns-3 and the mmWave module:

#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/mmwave-helper.h”

#include “ns3/config-store-module.h”

#include “ns3/antenna-module.h”

#include “ns3/propagation-module.h”

#include “ns3/eps-bearer.h”

using namespace ns3;

using namespace mmwave;

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

    // Set default parameters

    Config::SetDefault(“ns3::MmWaveHelper::RlcAmEnabled”, BooleanValue(true));

    Config::SetDefault(“ns3::MmWaveHelper::HarqEnabled”, BooleanValue(true));

    Config::SetDefault(“ns3::MmWaveHelper::FixedTti”, BooleanValue(false));

    // Parse command-line arguments

    CommandLine cmd;

    cmd.Parse(argc, argv);

    // Create nodes for the BBU pool and RRHs

    NodeContainer bbuNodes;

    bbuNodes.Create(1);

    NodeContainer rrhNodes;

    rrhNodes.Create(2);

    NodeContainer ueNodes;

    ueNodes.Create(3);

    // Set up point-to-point fronthaul links between BBU pool and RRHs

    PointToPointHelper p2p;

    p2p.SetDeviceAttribute(“DataRate”, StringValue(“10Gbps”));

    p2p.SetChannelAttribute(“Delay”, StringValue(“1ms”));

    NetDeviceContainer fronthaulDevices;

    fronthaulDevices = p2p.Install(bbuNodes.Get(0), rrhNodes.Get(0));

    fronthaulDevices.Add(p2p.Install(bbuNodes.Get(0), rrhNodes.Get(1)));

    // Install the mmWave protocol stack on the RRH nodes

    Ptr<MmWaveHelper> mmWaveHelper = CreateObject<MmWaveHelper>();

    mmWaveHelper->SetHarqEnabled(true);

    mmWaveHelper->SetLteEpcHelper(CreateObject<EpcHelper>());

    mmWaveHelper->Initialize();

    NetDeviceContainer enbDevs = mmWaveHelper->InstallEnbDevice(rrhNodes);

    NetDeviceContainer ueDevs = mmWaveHelper->InstallUeDevice(ueNodes);

    // Set up mobility models

    MobilityHelper mobility;

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

    mobility.Install(bbuNodes);

    mobility.Install(rrhNodes);

    mobility.Install(ueNodes);

    // Install the Internet stack on the UE nodes

    InternetStackHelper internet;

    internet.Install(ueNodes);

    // Assign IP addresses

    Ipv4AddressHelper ipv4;

    ipv4.SetBase(“7.0.0.0”, “255.0.0.0”);

    Ipv4InterfaceContainer ueIpIface;

    ueIpIface = ipv4.Assign(ueDevs);

    // Attach the UEs to the eNodeB

    mmWaveHelper->AttachToClosestEnb(ueDevs, enbDevs);

    // Install applications

    uint16_t dlPort = 1234;

    uint16_t ulPort = 2000;

    // Downlink application

    OnOffHelper dlClient(“ns3::UdpSocketFactory”, InetSocketAddress(ueIpIface.GetAddress(0), dlPort));

    dlClient.SetAttribute(“OnTime”, StringValue(“ns3::ConstantRandomVariable[Constant=1]”));

    dlClient.SetAttribute(“OffTime”, StringValue(“ns3::ConstantRandomVariable[Constant=0]”));

    dlClient.SetAttribute(“DataRate”, DataRateValue(DataRate(“100Mb/s”)));

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

    ApplicationContainer clientApps = dlClient.Install(rrhNodes.Get(0));

    clientApps.Start(Seconds(0.1));

    clientApps.Stop(Seconds(10.0));

    // Uplink application

    OnOffHelper ulClient(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address(“7.0.0.1”), ulPort));

    ulClient.SetAttribute(“OnTime”, StringValue(“ns3::ConstantRandomVariable[Constant=1]”));

    ulClient.SetAttribute(“OffTime”, StringValue(“ns3::ConstantRandomVariable[Constant=0]”));

    ulClient.SetAttribute(“DataRate”, DataRateValue(DataRate(“50Mb/s”)));

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

    clientApps = ulClient.Install(ueNodes.Get(0));

    clientApps.Start(Seconds(0.1));

    clientApps.Stop(Seconds(10.0));

    // Run the simulation

    Simulator::Stop(Seconds(10.0));

    Simulator::Run();

    Simulator::Destroy();

 

    return 0;

}

Explanation of the Script

Below is the process explanation for the script:

  1. Include Necessary Headers:
    • Include the required headers for ns-3, mmWave, and the necessary modules.
  2. Set Default Configuration:
    • Set default parameters for the mmWave simulation such as enabling RLC AM and HARQ.
  3. Create and Configure Nodes:
    • Create nodes for the BBU pool, RRHs, and UEs using NodeContainer.
    • Configure point-to-point fronthaul links between the BBU pool and RRHs.
  4. Install Protocol Stack:
    • Install the mmWave protocol stack on the RRH nodes using MmWaveHelper.
  5. Set Up Mobility:
    • Use MobilityHelper to assign mobility models to the nodes.
  6. Install Internet Stack:
    • Install the Internet stack on the UE nodes using InternetStackHelper.
  7. Assign IP Addresses:
    • Assign IP addresses to the UE devices using Ipv4AddressHelper.
  8. Attach UEs to eNodeB:
    • Attach the UE nodes to the closest RRH using MmWaveHelper.
  9. Install Applications:
    • Install downlink and uplink applications using OnOffHelper.
  10. Run the Simulation:
    • Set the simulation stop time, run the simulation, and clean up using Simulator::Stop, Simulator::Run, and Simulator::Destroy.

Further Enhancements

Here we provide the future improvements in cloud RAN environment in ns-3:

  1. Advanced Mobility Models:
    • Implement more realistic mobility models to simulate user movement.
  2. Quality of Service (QoS):
    • Implement QoS classes and policies for different types of traffic.
  3. Network Slicing:
    • Implement network slicing to provide dedicated virtual networks for different applications.
  4. Handover Scenarios:
    • Simulate handover scenarios where UEs move between different cells.
  5. Interference Modeling:
    • Model interference between different cells and evaluate mitigation techniques.
  6. Performance Metrics:
    • Collect and analyze performance metrics such as throughput, latency, and packet loss.

C-RAN environment in ns-3 are explained briefly , we offer and support all kinds of cloud RAN environment coding assistance..