/*
 * Copyright (c) 2016 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Biljana Bojovic <bbojovic@cttc.es>
 *
 */

#include "lte-test-carrier-aggregation.h"

#include "ns3/boolean.h"
#include "ns3/constant-position-mobility-model.h"
#include "ns3/double.h"
#include "ns3/enum.h"
#include "ns3/eps-bearer.h"
#include "ns3/ff-mac-scheduler.h"
#include "ns3/log.h"
#include "ns3/lte-enb-net-device.h"
#include "ns3/lte-enb-phy.h"
#include "ns3/lte-helper.h"
#include "ns3/lte-ue-net-device.h"
#include "ns3/lte-ue-phy.h"
#include "ns3/lte-ue-rrc.h"
#include "ns3/mobility-helper.h"
#include "ns3/net-device-container.h"
#include "ns3/node-container.h"
#include "ns3/object.h"
#include "ns3/packet.h"
#include "ns3/ptr.h"
#include "ns3/radio-bearer-stats-calculator.h"
#include "ns3/simulator.h"
#include "ns3/spectrum-error-model.h"
#include "ns3/spectrum-interference.h"
#include "ns3/string.h"
#include "ns3/test.h"

#include <errno.h>
#include <iostream>
#include <map>

using namespace ns3;

NS_LOG_COMPONENT_DEFINE("TestCarrierAggregation");

bool CarrierAggregationTestCase::s_writeResults = false; // set to true to write response vectors
const std::string dlResultsFileName = "carrier_aggregation_results_dl.txt";
const std::string ulResultsFileName = "carrier_aggregation_results_ul.txt";

void
LteTestDlSchedulingCallback(CarrierAggregationTestCase* testcase,
                            std::string path,
                            DlSchedulingCallbackInfo dlInfo)
{
    testcase->DlScheduling(dlInfo);
}

void
LteTestUlSchedulingCallback(CarrierAggregationTestCase* testcase,
                            std::string path,
                            uint32_t frameNo,
                            uint32_t subframeNo,
                            uint16_t rnti,
                            uint8_t mcs,
                            uint16_t sizeTb,
                            uint8_t ccId)
{
    testcase->UlScheduling(frameNo, subframeNo, rnti, mcs, sizeTb, ccId);
}

TestCarrierAggregationSuite::TestCarrierAggregationSuite()
    : TestSuite("lte-carrier-aggregation", Type::SYSTEM)
{
    NS_LOG_INFO("creating CarrierAggregationTestCase");

    if (CarrierAggregationTestCase::s_writeResults) // write result vectors to file
    {
        std::cout << "\n Running TestCarrierAggregationSuite with activated option to write "
                     "results to files."
                     "Dl results will be written to "
                  << dlResultsFileName << " and uplink results to " << ulResultsFileName
                  << std::endl;

        bool abort = false;

        if (fopen(dlResultsFileName.c_str(), "r"))
        {
            std::cout << "\nResults file " << dlResultsFileName
                      << " already exists. Move it out of the way or specify another downlink "
                         "results file name."
                      << std::endl;
            abort = true;
        }
        if (fopen(ulResultsFileName.c_str(), "r"))
        {
            std::cout << "\nResults file " << ulResultsFileName
                      << " already exists. Move it out of the way or specify another uplink "
                         "results file name."
                      << std::endl;
            abort = true;
        }

        if (abort)
        {
            return;
        }

        AddTestCase(new CarrierAggregationTestCase(1, 0, 100, 100, 1), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 100, 100, 1), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 100, 100, 1), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 100, 100, 1), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 100, 100, 1), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 100, 100, 1), TestCase::Duration::QUICK);

        AddTestCase(new CarrierAggregationTestCase(1, 0, 100, 100, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 100, 100, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 100, 100, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 100, 100, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 100, 100, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 100, 100, 2), TestCase::Duration::QUICK);

        AddTestCase(new CarrierAggregationTestCase(1, 0, 100, 100, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 100, 100, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 100, 100, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 100, 100, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 100, 100, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 100, 100, 3), TestCase::Duration::QUICK);
    }
    else
    {
        // bandwidth is 25 and there are 2 carriers
        AddTestCase(new CarrierAggregationTestCase(1, 0, 25, 25, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 25, 25, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 25, 25, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 25, 25, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 4800, 25, 25, 2), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 4800, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 4800, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 4800, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 4800, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 4800, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 6000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 20000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 20000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 20000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 20000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 20000, 25, 25, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 20000, 25, 25, 2),
                    TestCase::Duration::QUICK);

        // bandwidth is 25 and there are 3 carriers
        AddTestCase(new CarrierAggregationTestCase(1, 0, 25, 25, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 25, 25, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 25, 25, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 25, 25, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 4800, 25, 25, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 4800, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 4800, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 4800, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 4800, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 4800, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 6000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 20000, 25, 25, 3),
                    TestCase::Duration::EXTENSIVE);

        // bandwidth = 6 RB and there are 3 carriers
        AddTestCase(new CarrierAggregationTestCase(1, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 6, 6, 3), TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 4800, 6, 6, 3), TestCase::Duration::QUICK);
        AddTestCase(new CarrierAggregationTestCase(3, 4800, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 4800, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 4800, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 4800, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 4800, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(1, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 6000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(1, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 20000, 6, 6, 3),
                    TestCase::Duration::EXTENSIVE);

        // bandwidth = 6 RB and there are 2 carriers
        AddTestCase(new CarrierAggregationTestCase(1, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 0, 6, 6, 2), TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 4800, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);

        AddTestCase(new CarrierAggregationTestCase(1, 6000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 6000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 6000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 6000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 6000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 6000, 6, 6, 2), TestCase::Duration::QUICK);

        AddTestCase(new CarrierAggregationTestCase(1, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(3, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(6, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(9, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(12, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
        AddTestCase(new CarrierAggregationTestCase(15, 20000, 6, 6, 2),
                    TestCase::Duration::EXTENSIVE);
    }
}

/**
 * @ingroup lte-test
 * Static variable for test initialization
 */
static TestCarrierAggregationSuite lenaTestRrFfMacSchedulerSuite;

std::string
CarrierAggregationTestCase::BuildNameString(uint16_t nUser,
                                            uint16_t dist,
                                            uint32_t dlBandwidth,
                                            uint32_t ulBandwidth,
                                            uint32_t numberOfComponentCarriers)
{
    std::ostringstream oss;
    oss << nUser << " UEs, distance " << dist << " m"
        << " dlBandwidth " << dlBandwidth << " ulBandwidth " << ulBandwidth
        << " number of carriers " << numberOfComponentCarriers;
    return oss.str();
}

CarrierAggregationTestCase::CarrierAggregationTestCase(uint16_t nUser,
                                                       uint16_t dist,
                                                       uint32_t dlbandwidth,
                                                       uint32_t ulBandwidth,
                                                       uint32_t numberOfComponentCarriers)
    : TestCase(BuildNameString(nUser, dist, dlbandwidth, ulBandwidth, numberOfComponentCarriers)),
      m_nUser(nUser),
      m_dist(dist),
      m_dlBandwidth(dlbandwidth),
      m_ulBandwidth(ulBandwidth),
      m_numberOfComponentCarriers(numberOfComponentCarriers)
{
    m_dlThroughput = 0;
    m_statsDuration = 0.6;
}

CarrierAggregationTestCase::~CarrierAggregationTestCase()
{
}

void
CarrierAggregationTestCase::DoRun()
{
    NS_LOG_FUNCTION(this << m_nUser << m_dist << m_dlBandwidth << m_ulBandwidth
                         << m_numberOfComponentCarriers);
    SetDataDir(NS_TEST_SOURCEDIR);

    Config::SetDefault("ns3::LteEnbNetDevice::DlEarfcn", UintegerValue(100));
    Config::SetDefault("ns3::LteEnbNetDevice::UlEarfcn", UintegerValue(100 + 18000));
    Config::SetDefault("ns3::LteEnbNetDevice::DlBandwidth", UintegerValue(m_dlBandwidth));
    Config::SetDefault("ns3::LteEnbNetDevice::UlBandwidth", UintegerValue(m_ulBandwidth));
    Config::SetDefault("ns3::LteUeNetDevice::DlEarfcn", UintegerValue(100));

    Config::SetDefault("ns3::LteHelper::UseCa", BooleanValue(true));
    Config::SetDefault("ns3::LteHelper::NumberOfComponentCarriers",
                       UintegerValue(m_numberOfComponentCarriers));
    Config::SetDefault("ns3::LteHelper::EnbComponentCarrierManager",
                       StringValue("ns3::RrComponentCarrierManager"));
    Config::SetDefault("ns3::LteSpectrumPhy::CtrlErrorModelEnabled", BooleanValue(false));
    Config::SetDefault("ns3::LteSpectrumPhy::DataErrorModelEnabled", BooleanValue(false));
    Config::SetDefault("ns3::LteHelper::UseIdealRrc", BooleanValue(true));

    Config::SetDefault("ns3::MacStatsCalculator::DlOutputFilename",
                       StringValue(CreateTempDirFilename("DlMacStats.txt")));
    Config::SetDefault("ns3::MacStatsCalculator::UlOutputFilename",
                       StringValue(CreateTempDirFilename("UlMacStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::DlRlcOutputFilename",
                       StringValue(CreateTempDirFilename("DlRlcStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::UlRlcOutputFilename",
                       StringValue(CreateTempDirFilename("UlRlcStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::DlPdcpOutputFilename",
                       StringValue(CreateTempDirFilename("DlPdcpStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::UlPdcpOutputFilename",
                       StringValue(CreateTempDirFilename("UlPdcpStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::DlRsrpSinrFilename",
                       StringValue(CreateTempDirFilename("DlRsrpSinrStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::UlSinrFilename",
                       StringValue(CreateTempDirFilename("UlSinrStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::UlInterferenceFilename",
                       StringValue(CreateTempDirFilename("UlInterferenceStats.txt")));
    Config::SetDefault("ns3::PhyRxStatsCalculator::DlRxOutputFilename",
                       StringValue(CreateTempDirFilename("DlRxPhyStats.txt")));
    Config::SetDefault("ns3::PhyRxStatsCalculator::UlRxOutputFilename",
                       StringValue(CreateTempDirFilename("UlRxPhyStats.txt")));
    Config::SetDefault("ns3::PhyTxStatsCalculator::DlTxOutputFilename",
                       StringValue(CreateTempDirFilename("DlTxPhyStats.txt")));
    Config::SetDefault("ns3::PhyTxStatsCalculator::UlTxOutputFilename",
                       StringValue(CreateTempDirFilename("UlTxPhyStats.txt")));

    /**
     * Initialize Simulation Scenario: 1 eNB and m_nUser UEs
     */

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

    lteHelper->SetAttribute("PathlossModel", StringValue("ns3::FriisSpectrumPropagationLossModel"));

    // Create Nodes: eNodeB and UE
    NodeContainer enbNodes;
    NodeContainer ueNodes;
    enbNodes.Create(1);
    ueNodes.Create(m_nUser);

    // Install Mobility Model
    MobilityHelper mobility;
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(enbNodes);
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(ueNodes);

    // Create Devices and install them in the Nodes (eNB and UE)
    NetDeviceContainer enbDevs;
    NetDeviceContainer ueDevs;
    lteHelper->SetSchedulerType("ns3::PfFfMacScheduler");
    lteHelper->SetSchedulerAttribute("UlCqiFilter", EnumValue(FfMacScheduler::SRS_UL_CQI));
    enbDevs = lteHelper->InstallEnbDevice(enbNodes);
    ueDevs = lteHelper->InstallUeDevice(ueNodes);

    // Attach a UE to a eNB
    lteHelper->Attach(ueDevs, enbDevs.Get(0));

    // Activate an EPS bearer
    EpsBearer::Qci q = EpsBearer::GBR_CONV_VOICE;
    EpsBearer bearer(q);
    lteHelper->ActivateDataRadioBearer(ueDevs, bearer);

    Ptr<LteEnbNetDevice> lteEnbDev = enbDevs.Get(0)->GetObject<LteEnbNetDevice>();
    Ptr<LteEnbPhy> enbPhy = lteEnbDev->GetPhy();
    enbPhy->SetAttribute("TxPower", DoubleValue(30.0));
    enbPhy->SetAttribute("NoiseFigure", DoubleValue(5.0));

    // Set UEs' position and power
    for (int i = 0; i < m_nUser; i++)
    {
        Ptr<ConstantPositionMobilityModel> mm =
            ueNodes.Get(i)->GetObject<ConstantPositionMobilityModel>();
        mm->SetPosition(Vector(m_dist, 0.0, 0.0));
        Ptr<LteUeNetDevice> lteUeDev = ueDevs.Get(i)->GetObject<LteUeNetDevice>();
        Ptr<LteUePhy> uePhy = lteUeDev->GetPhy();
        uePhy->SetAttribute("TxPower", DoubleValue(23.0));
        uePhy->SetAttribute("NoiseFigure", DoubleValue(9.0));
    }

    double statsStartTime = 0.300; // need to allow for RRC connection establishment + SRS

    Simulator::Stop(Seconds(statsStartTime + m_statsDuration - 0.0001));

    Config::Connect("/NodeList/*/DeviceList/*/ComponentCarrierMap/*/LteEnbMac/DlScheduling",
                    MakeBoundCallback(&LteTestDlSchedulingCallback, this));

    Config::Connect("/NodeList/*/DeviceList/*/ComponentCarrierMap/*/LteEnbMac/UlScheduling",
                    MakeBoundCallback(&LteTestUlSchedulingCallback, this));

    lteHelper->EnableTraces();

    Simulator::Run();

    /**
     * Check that the assignment is done in a RR fashion
     */
    NS_LOG_INFO("DL - Test with " << m_nUser << " user(s) at distance " << m_dist);
    std::vector<uint64_t> dlDataRxed;

    // tolerance increases with the number of users because the lc 0 and lc 1 will go always over
    // primary carrier, so as the number of users increases the difference between primary and
    // secondary
    // carrier will increase

    bool testDownlinkShare = true;

    for (auto itDownlink = m_ccDownlinkTraffic.begin(); itDownlink != m_ccDownlinkTraffic.end();
         itDownlink++)
    {
        if (itDownlink == m_ccDownlinkTraffic.begin())
        {
            NS_LOG_INFO("Downlink traffic per carrier:" << itDownlink->second);
        }
        else
        {
            if (itDownlink->second != m_ccDownlinkTraffic.begin()->second)
            {
                testDownlinkShare = false;
                break;
            }
        }
    }

    bool testUplinkShare = true;

    for (auto itUplink = m_ccUplinkTraffic.begin(); itUplink != m_ccUplinkTraffic.end(); itUplink++)
    {
        if (itUplink == m_ccUplinkTraffic.begin())
        {
            NS_LOG_INFO("Uplink traffic per carrier:" << itUplink->second);
        }
        else
        {
            if (itUplink->second != m_ccUplinkTraffic.begin()->second)
            {
                testUplinkShare = false;
                break;
            }
        }
    }

    NS_TEST_ASSERT_MSG_EQ(m_ccUplinkTraffic.size(),
                          m_numberOfComponentCarriers,
                          "Number of carriers in uplink does not correspond to number of carriers "
                          "being configured in test.");
    NS_TEST_ASSERT_MSG_EQ(m_ccDownlinkTraffic.size(),
                          m_numberOfComponentCarriers,
                          "Number of carriers in downlink does not correspond to number of "
                          "carriers being configured in test.");

    NS_TEST_ASSERT_MSG_EQ(testDownlinkShare,
                          true,
                          " Downlink traffic not split equally between carriers!");
    NS_TEST_ASSERT_MSG_EQ(testUplinkShare,
                          true,
                          " Uplink traffic not split equally between carriers");

    if (s_writeResults)
    {
        WriteResultToFile();
    }

    Simulator::Destroy();
}

void
CarrierAggregationTestCase::DlScheduling(DlSchedulingCallbackInfo dlInfo)
{
    // NS_LOG_FUNCTION (dlInfo.frameNo << dlInfo.subframeNo << dlInfo.rnti << (uint32_t)
    // dlInfo.mcsTb1 << dlInfo.sizeTb1 << (uint32_t) dlInfo.mcsTb2 <<
    // dlInfo.sizeTb2<<(uint16_t)dlInfo.componentCarrierId);
    //  need to allow for RRC connection establishment + CQI feedback reception + persistent data
    //  transmission
    if (Simulator::Now() > MilliSeconds(300))
    {
        if (m_ccDownlinkTraffic.find(dlInfo.componentCarrierId) == m_ccDownlinkTraffic.end())
        {
            m_ccDownlinkTraffic.insert(
                std::pair<uint8_t, uint32_t>(dlInfo.componentCarrierId,
                                             dlInfo.sizeTb1 + dlInfo.sizeTb2));
        }
        else
        {
            m_ccDownlinkTraffic[dlInfo.componentCarrierId] += (dlInfo.sizeTb1 + dlInfo.sizeTb2);
        }

        m_dlThroughput += dlInfo.sizeTb1 + dlInfo.sizeTb2;
    }
}

void
CarrierAggregationTestCase::UlScheduling(uint32_t frameNo,
                                         uint32_t subframeNo,
                                         uint16_t rnti,
                                         uint8_t mcs,
                                         uint16_t sizeTb,
                                         uint8_t componentCarrierId)
{
    // NS_LOG_FUNCTION (frameNo << subframeNo << rnti << (uint32_t) mcs << sizeTb);
    //  need to allow for RRC connection establishment + SRS transmission
    if (Simulator::Now() > MilliSeconds(300))
    {
        if (m_ccUplinkTraffic.find(componentCarrierId) == m_ccUplinkTraffic.end())
        {
            m_ccUplinkTraffic.insert(std::pair<uint8_t, uint32_t>(componentCarrierId, sizeTb));
        }
        else
        {
            m_ccUplinkTraffic[componentCarrierId] += sizeTb;
        }

        m_ulThroughput += sizeTb;
    }
}

void
CarrierAggregationTestCase::WriteResultToFile() const
{
    std::ofstream dlOutFile;
    dlOutFile.open(dlResultsFileName, std::ofstream::out | std::ofstream::app);
    dlOutFile.setf(std::ios_base::fixed);

    if (!dlOutFile.is_open())
    {
        NS_LOG_ERROR("Can't open file " << dlResultsFileName);
        return;
    }
    dlOutFile << m_nUser << " " << m_numberOfComponentCarriers << " "
              << ((m_dlThroughput * 8) / m_statsDuration) / m_nUser << std::endl;
    dlOutFile.close();

    std::ofstream ulOutFile;
    ulOutFile.open(ulResultsFileName, std::ofstream::out | std::ofstream::app);
    ulOutFile.setf(std::ios_base::fixed);

    if (!ulOutFile.is_open())
    {
        NS_LOG_ERROR("Can't open file " << ulResultsFileName);
        return;
    }
    ulOutFile << m_nUser << " " << m_numberOfComponentCarriers << " "
              << ((m_ulThroughput * 8) / m_statsDuration) / m_nUser << std::endl;
    ulOutFile.close();
}
