/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Marco Miozzo <marco.miozzo@cttc.es>,

 *         Nicola Baldo <nbaldo@cttc.es>

 *         Dizhi Zhou <dizhi.zhou@gmail.com>

 */

#include <iostream>

#include <sstream>

#include <string>

#include <ns3/object.h>

#include <ns3/spectrum-interference.h>

#include <ns3/spectrum-error-model.h>

#include <ns3/log.h>

#include <ns3/test.h>

#include <ns3/simulator.h>

#include <ns3/packet.h>

#include <ns3/ptr.h>

#include "ns3/radio-bearer-stats-calculator.h"

#include <ns3/constant-position-mobility-model.h>

#include <ns3/eps-bearer.h>

#include <ns3/node-container.h>

#include <ns3/mobility-helper.h>

#include <ns3/net-device-container.h>

#include <ns3/lte-ue-net-device.h>

#include <ns3/lte-enb-net-device.h>

#include <ns3/lte-ue-rrc.h>

#include <ns3/lte-helper.h>

#include "ns3/string.h"

#include "ns3/double.h"

#include <ns3/lte-enb-phy.h>

#include <ns3/lte-ue-phy.h>

#include <ns3/boolean.h>

#include <ns3/enum.h>

#include "ns3/point-to-point-epc-helper.h"

#include "ns3/network-module.h"

#include "ns3/ipv4-global-routing-helper.h"

#include "ns3/internet-module.h"

#include "ns3/applications-module.h"

#include "ns3/point-to-point-helper.h"

#include "lte-test-fdtbfq-ff-mac-scheduler.h"

NS_LOG_COMPONENT_DEFINE ("LenaTestFdTbfqFfMacScheduler");

LenaTestFdTbfqFfMacSchedulerSuite::LenaTestFdTbfqFfMacSchedulerSuite ()

  : TestSuite ("lte-fdtbfq-ff-mac-scheduler", SYSTEM)

{

  NS_LOG_INFO ("creating LenaTestFdTbfqFfMacSchedulerSuite");

  bool errorModel = false;

  // General config

  // Traffic: UDP traffic with fixed rate

  // Token generation rate = traffic rate

  // RLC header length = 2 bytes, PDCP header = 2 bytes

  // Simulation time = 1.0 sec

  // Throughput in this file is calculated in RLC layer

  //Test Case 1: homogeneous flow test in FDTBFQ (same distance)

  // DOWNLINK -> DISTANCE 0 -> MCS 28 -> Itbs 26 (from table 7.1.7.2.1-1 of 36.2    13)

  // Traffic info

  //   UDP traffic: payload size = 200 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 232000 byte/rate 

  // Totol bandwidth: 24 PRB at Itbs 26 -> 2196 -> 2196000 byte/sec

  // 1 user -> 232000 * 1 = 232000 < 2196000 -> throughput = 232000 byte/sec

  // 3 user -> 232000 * 3 = 696000 < 2196000 -> througphut = 232000 byte/sec

  // 6 user -> 232000 * 6 = 139200 < 2196000 -> throughput = 232000 byte/sec

  // 12 user -> 232000 * 12 = 2784000 > 2196000 -> throughput = 2196000 / 12 = 183000 byte/sec

  // UPLINK -> DISTANCE 0 -> MCS 28 -> Itbs 26 (from table 7.1.7.2.1-1 of 36.2    13)

  // 1 user -> 25 PRB at Itbs 26 -> 2292 -> 2292000 > 232000 -> throughput = 232000 bytes/sec

  // 3 users -> 8 PRB at Itbs 26 -> 749 -> 749000 > 232000 -> throughput = 232000 bytes/sec 

  // 6 users -> 4 PRB at Itbs 26 -> 373 -> 373000 > 232000 -> throughput = 232000 bytes/sec

  // 12 users -> 2 PRB at Itbs 26 -> 185 -> 185000 < 232000 -> throughput = 185000 bytes/sec

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (1,0,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (3,0,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (6,0,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  //AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (12,0,183000,185000,200,1,errorModel));// simulation time = 1.5, otherwise, ul test will fail

  // DOWNLINK - DISTANCE 4800 -> MCS 22 -> Itbs 20 (from table 7.1.7.2.1-1 of 36.213)

  // Traffic info

  //   UDP traffic: payload size = 200 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 232000 byte/rate 

  // Totol bandwidth: 24 PRB at Itbs 20 -> 1383 -> 1383000 byte/sec

  // 1 user -> 903000 * 1 = 232000 < 1383000 -> throughput = 232000 byte/sec

  // 3 user -> 232000 * 3 = 696000 < 1383000 -> througphut = 232000 byte/sec

  // 6 user -> 232000 * 6 = 139200 > 1383000 -> throughput = 1383000 / 6 = 230500 byte/sec

  // 12 user -> 232000 * 12 = 2784000 > 1383000 -> throughput =  1383000 / 12 = 115250 byte/sec

  // UPLINK - DISTANCE 4800 -> MCS 14 -> Itbs 13 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 25 PRB at Itbs 13 -> 807 -> 807000 > 232000 -> throughput = 232000 bytes/sec

  // 3 users -> 8 PRB at Itbs 13 -> 253 -> 253000 > 232000 -> throughput = 232000 bytes/sec

  // 6 users -> 4 PRB at Itbs 13 -> 125 -> 125000 < 232000 -> throughput = 125000 bytes/sec

  // after the patch enforcing min 3 PRBs per UE:

  // 12 users -> 3 PRB at Itbs 13 -> 93  bytes * 8/12 UE/TTI  -> 62000 < 232000 -> throughput = 62000  bytes/sec

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (1,4800,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (3,4800,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (6,4800,230500,125000,200,1,errorModel), TestCase::EXTENSIVE);

  //AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (12,4800,75250,62000,200,1,errorModel)); // simulation time = 1.5, otherwise, ul test will fail

  // DOWNLINK - DISTANCE 6000 -> MCS 20 -> Itbs 18 (from table 7.1.7.2.1-1 of 36.213)

  // Traffic info

  //   UDP traffic: payload size = 200 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 232000 byte/rate 

  // Totol bandwidth: 24 PRB at Itbs 18 -> 1191 -> 1191000 byte/sec

  // 1 user -> 903000 * 1 = 232000 < 1191000 -> throughput = 232000 byte/sec

  // 3 user -> 232000 * 3 = 696000 < 1191000 -> througphut = 232000 byte/sec

  // 6 user -> 232000 * 6 = 1392000 > 1191000 -> throughput = 1191000 / 6 = 198500 byte/sec

  // 12 user -> 232000 * 12 = 2784000 > 1191000 -> throughput =  1191000 / 12 = 99250 byte/sec

  // UPLINK - DISTANCE 6000 -> MCS 12 -> Itbs 11 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 25 PRB at Itbs 11 -> 621 -> 621000 > 232000 -> throughput = 232000 bytes/sec

  // 3 users -> 8 PRB at Itbs 11 -> 201 -> 201000 < 232000 -> throughput = 201000  bytes/sec

  // 6 users -> 4 PRB at Itbs 11 -> 97 -> 97000 < 232000 -> throughput = 97000 bytes/sec

  // after the patch enforcing min 3 PRBs per UE:

  // 12 users -> 3 PRB at Itbs 11 -> 73 bytes * 8/12 UE/TTI -> 48667 < 232000 -> throughput = 48667 bytes/sec

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (1,6000,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (3,6000,232000,201000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (6,6000,198500,97000,200,1,errorModel), TestCase::EXTENSIVE);

  //AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (12,6000,99250,48667,200,1, errorModel)); // simulation time = 1.5, otherwise, ul test will fail

  // DOWNLINK - DISTANCE 10000 -> MCS 14 -> Itbs 13 (from table 7.1.7.2.1-1 of 36.213)

  // Traffic info

  //   UDP traffic: payload size = 200 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 232000 byte/rate 

  // Totol bandwidth: 24 PRB at Itbs 13 -> 775 -> 775000 byte/sec

  // 1 user -> 903000 * 1 = 232000 < 775000 -> throughput = 232000 byte/sec

  // 3 user -> 232000 * 3 = 696000 < 775000 -> througphut = 232000 byte/sec

  // 6 user -> 232000 * 6 = 139200 > 775000 -> throughput = 775000 / 6 = 129166 byte/sec

  // 12 user -> 232000 * 12 = 2784000 > 775000 -> throughput =  775000 / 12 = 64583 byte/sec

  // UPLINK - DISTANCE 10000 -> MCS 8 -> Itbs 8 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 8 -> 437 -> 437000 > 232000 -> throughput = 232000 bytes/sec

  // 3 users -> 8 PRB at Itbs 8 -> 137 -> 137000 < 232000 -> throughput = 137000 bytes/sec

  // 6 users -> 4 PRB at Itbs 8 -> 67 -> 67000 < 232000 -> throughput = 67000 bytes/sec

  // after the patch enforcing min 3 PRBs per UE:

  // 12 users -> 3 PRB at Itbs 8 -> 49 bytes * 8/12 UE/TTI -> 32667 < 232000 -> throughput = 32667  bytes/sec

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (1,10000,232000,232000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (3,10000,232000,137000,200,1,errorModel), TestCase::EXTENSIVE);

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (6,10000,129166,67000,200,1,errorModel), TestCase::EXTENSIVE);

  //AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase1 (12,10000,64583,32667,200,1,errorModel));// simulation time = 1.5, otherwise, ul test will fail

  // Test Case 2: homogeneous flow test in FDTBFQ (different distance)

  // Traffic1 info

  //   UDP traffic: payload size = 100 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 132000 byte/rate 

  // Maximum throughput = 4 / ( 1/2196000 + 1/1191000 + 1/1383000 + 1/775000 ) = 1209046 byte/s

  // 132000 * 4 = 528000 < 1209046 -> estimated throughput in downlink = 132000 byte/sec

  std::vector<uint16_t> dist1;

  dist1.push_back (0);       // User 0 distance --> MCS 28

  dist1.push_back (4800);    // User 1 distance --> MCS 22

  dist1.push_back (6000);    // User 2 distance --> MCS 20

  dist1.push_back (10000);   // User 3 distance --> MCS 14

  std::vector<uint16_t> packetSize1;

  packetSize1.push_back (100);

  packetSize1.push_back (100);

  packetSize1.push_back (100);

  packetSize1.push_back (100);

  std::vector<uint32_t> estThrFdTbfqDl1;

  estThrFdTbfqDl1.push_back (132000); // User 0 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl1.push_back (132000); // User 1 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl1.push_back (132000); // User 2 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl1.push_back (132000); // User 3 estimated TTI throughput from FDTBFQ

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase2 (dist1,estThrFdTbfqDl1,packetSize1,1,errorModel), TestCase::EXTENSIVE);

  // Traffic2 info

  //   UDP traffic: payload size = 300 bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> 332000 byte/rate

  // Maximum throughput = 4 / ( 1/2196000 + 1/1191000 + 1/1383000 + 1/775000 ) = 1209046 byte/s

  // 232000 * 4 = 1328000 > 1209046 -> estimated throughput in downlink = 1209046 / 4 = 302266 byte/sec

  std::vector<uint16_t> dist2;

  dist2.push_back (0);       // User 0 distance --> MCS 28

  dist2.push_back (4800);    // User 1 distance --> MCS 22

  dist2.push_back (6000);    // User 2 distance --> MCS 20

  dist2.push_back (10000);   // User 3 distance --> MCS 14

  std::vector<uint16_t> packetSize2;

  packetSize2.push_back (300);

  packetSize2.push_back (300);

  packetSize2.push_back (300);

  packetSize2.push_back (300);

  std::vector<uint32_t> estThrFdTbfqDl2;

  estThrFdTbfqDl2.push_back (302266); // User 0 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl2.push_back (302266); // User 1 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl2.push_back (302266); // User 2 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl2.push_back (302266); // User 3 estimated TTI throughput from FDTBFQ

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase2 (dist2,estThrFdTbfqDl2,packetSize2,1,errorModel), TestCase::EXTENSIVE);

  // Test Case 3: heterogeneous flow test in FDTBFQ

  //   UDP traffic: payload size = [100,200,300] bytes, interval = 1 ms

  //   UDP rate in scheduler: (payload + RLC header + PDCP header + IP header + UDP header) * 1000 byte/sec -> [132000, 232000, 332000] byte/rate 

  // Maximum throughput = 3 / ( 1/2196000 + 1/1191000 + 1/1383000) = 1486569 byte/s

  // 132000 + 232000 + 332000 = 696000 < 1486569 -> estimated throughput in downlink = [132000, 232000, 332000] byte/sec

  std::vector<uint16_t> dist3;

  dist3.push_back (0);    // User 0 distance --> MCS 28

  dist3.push_back (4800);    // User 1 distance --> MCS 22

  dist3.push_back (6000);    // User 2 distance --> MCS 20

  std::vector<uint16_t> packetSize3;

  packetSize3.push_back (100);

  packetSize3.push_back (200);

  packetSize3.push_back (300);

  std::vector<uint32_t> estThrFdTbfqDl3;

  estThrFdTbfqDl3.push_back (132000); // User 0 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl3.push_back (232000); // User 1 estimated TTI throughput from FDTBFQ

  estThrFdTbfqDl3.push_back (332000); // User 2 estimated TTI throughput from FDTBFQ

  AddTestCase (new LenaFdTbfqFfMacSchedulerTestCase2 (dist3,estThrFdTbfqDl3,packetSize3,1,errorModel), TestCase::QUICK);

}

static LenaTestFdTbfqFfMacSchedulerSuite lenaTestFdTbfqFfMacSchedulerSuite;

// --------------- T E S T - C A S E   # 1 ------------------------------

std::string 

LenaFdTbfqFfMacSchedulerTestCase1::BuildNameString (uint16_t nUser, uint16_t dist)

{

  std::ostringstream oss;

  oss << nUser << " UEs, distance " << dist << " m";

  return oss.str ();

}

LenaFdTbfqFfMacSchedulerTestCase1::LenaFdTbfqFfMacSchedulerTestCase1 (uint16_t nUser, uint16_t dist, double thrRefDl, double thrRefUl, uint16_t packetSize, uint16_t interval,bool errorModelEnabled)

  : TestCase (BuildNameString (nUser, dist)),

    m_nUser (nUser),

    m_dist (dist),

    m_packetSize (packetSize),

    m_interval (interval),

    m_thrRefDl (thrRefDl),

    m_thrRefUl (thrRefUl),

    m_errorModelEnabled (errorModelEnabled)

{

}

LenaFdTbfqFfMacSchedulerTestCase1::~LenaFdTbfqFfMacSchedulerTestCase1 ()

{

}

void

LenaFdTbfqFfMacSchedulerTestCase1::DoRun (void)

{

  NS_LOG_FUNCTION (this << GetName ());

  if (!m_errorModelEnabled)

    {

      Config::SetDefault ("ns3::LteSpectrumPhy::CtrlErrorModelEnabled", BooleanValue (false));

      Config::SetDefault ("ns3::LteSpectrumPhy::DataErrorModelEnabled", BooleanValue (false));

    }

  Config::SetDefault ("ns3::LteHelper::UseIdealRrc", BooleanValue (true));

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

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

  lteHelper->SetEpcHelper (epcHelper);

  //LogComponentEnable ("FdTbfqFfMacScheduler", LOG_DEBUG);

  Ptr<Node> pgw = epcHelper->GetPgwNode ();

  // Create a single RemoteHost

  NodeContainer remoteHostContainer;

  remoteHostContainer.Create (1);

  Ptr<Node> remoteHost = remoteHostContainer.Get (0);

  InternetStackHelper internet;

  internet.Install (remoteHostContainer);

  // Create the Internet

  PointToPointHelper p2ph;

  p2ph.SetDeviceAttribute ("DataRate", DataRateValue (DataRate ("100Gb/s")));

  p2ph.SetDeviceAttribute ("Mtu", UintegerValue (1500));

  p2ph.SetChannelAttribute ("Delay", TimeValue (Seconds (0.001)));

  NetDeviceContainer internetDevices = p2ph.Install (pgw, remoteHost);

  Ipv4AddressHelper ipv4h;

  ipv4h.SetBase ("1.0.0.0", "255.0.0.0");

  Ipv4InterfaceContainer internetIpIfaces = ipv4h.Assign (internetDevices);

  // interface 0 is localhost, 1 is the p2p device

  Ipv4Address remoteHostAddr = internetIpIfaces.GetAddress (1);

  Ipv4StaticRoutingHelper ipv4RoutingHelper;

  Ptr<Ipv4StaticRouting> remoteHostStaticRouting = ipv4RoutingHelper.GetStaticRouting (remoteHost->GetObject<Ipv4> ());

  remoteHostStaticRouting->AddNetworkRouteTo (Ipv4Address ("7.0.0.0"), Ipv4Mask ("255.0.0.0"), 1);

  //Config::SetDefault ("ns3::LteAmc::AmcModel", EnumValue (LteAmc::PiroEW2010));

  //Config::SetDefault ("ns3::LteAmc::Ber", DoubleValue (0.00005));

  //Config::SetDefault ("ns3::LteSpectrumPhy::CtrlErrorModelEnabled", BooleanValue (false));

  //Config::SetDefault ("ns3::LteSpectrumPhy::DataErrorModelEnabled", BooleanValue (false));

  //Config::SetDefault ("ns3::LteEnbRrc::EpsBearerToRlcMapping", EnumValue (LteHelper::RLC_UM_ALWAYS));

//   LogComponentDisableAll (LOG_LEVEL_ALL);

  //LogComponentEnable ("LenaTestFdTbfqFfMacCheduler", LOG_LEVEL_ALL);

  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::FdTbfqFfMacScheduler");

  enbDevs = lteHelper->InstallEnbDevice (enbNodes);

  ueDevs = lteHelper->InstallUeDevice (ueNodes);

  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));

    }

  // Install the IP stack on the UEs

  internet.Install (ueNodes);

  Ipv4InterfaceContainer ueIpIface;

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

  // Assign IP address to UEs

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

    {

      Ptr<Node> ueNode = ueNodes.Get (u);

      // Set the default gateway for the UE

      Ptr<Ipv4StaticRouting> ueStaticRouting = ipv4RoutingHelper.GetStaticRouting (ueNode->GetObject<Ipv4> ());

      ueStaticRouting->SetDefaultRoute (epcHelper->GetUeDefaultGatewayAddress (), 1);

    }

  // Attach a UE to a eNB

  lteHelper->Attach (ueDevs, enbDevs.Get (0));

  // Activate an EPS bearer on all UEs

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

    {

      Ptr<NetDevice> ueDevice = ueDevs.Get (u);

      GbrQosInformation qos;

      qos.gbrDl = (m_packetSize + 32) * (1000 / m_interval) * 8;  // bit/s, considering IP, UDP, RLC, PDCP header size

      qos.gbrUl = 0;

      qos.mbrDl = qos.gbrDl;

      qos.mbrUl = 0;

      enum EpsBearer::Qci q = EpsBearer::GBR_CONV_VOICE;

      EpsBearer bearer (q, qos);

      lteHelper->ActivateDedicatedEpsBearer (ueDevice, bearer, EpcTft::Default ());  

    }

  // Install downlind and uplink applications

  uint16_t dlPort = 1234;

  uint16_t ulPort = 2000;

  PacketSinkHelper dlPacketSinkHelper ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), dlPort));

  PacketSinkHelper ulPacketSinkHelper ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), ulPort));

  ApplicationContainer clientApps;

  ApplicationContainer serverApps;

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

    {

      ++ulPort;

      serverApps.Add (dlPacketSinkHelper.Install (ueNodes.Get (u))); // receive packets from remotehost

      serverApps.Add (ulPacketSinkHelper.Install (remoteHost));  // receive packets from UEs

      UdpClientHelper dlClient (ueIpIface.GetAddress (u), dlPort); // uplink packets generator

      dlClient.SetAttribute ("Interval", TimeValue (MilliSeconds (m_interval)));

      dlClient.SetAttribute ("MaxPackets", UintegerValue (1000000));

      dlClient.SetAttribute ("PacketSize", UintegerValue (m_packetSize));

      UdpClientHelper ulClient (remoteHostAddr, ulPort);           // downlink packets generator

      ulClient.SetAttribute ("Interval", TimeValue (MilliSeconds (m_interval)));

      ulClient.SetAttribute ("MaxPackets", UintegerValue (1000000));

      ulClient.SetAttribute ("PacketSize", UintegerValue (m_packetSize));

      clientApps.Add (dlClient.Install (remoteHost));

      clientApps.Add (ulClient.Install (ueNodes.Get (u)));

    }

  serverApps.Start (Seconds (0.001));

  clientApps.Start (Seconds (0.001));

  double statsStartTime = 0.001; // need to allow for RRC connection establishment + SRS

  double statsDuration = 1;

  double tolerance = 0.1;

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

  lteHelper->EnableRlcTraces ();

  lteHelper->EnableMacTraces ();

  Ptr<RadioBearerStatsCalculator> rlcStats = lteHelper->GetRlcStats ();

  rlcStats->SetAttribute ("StartTime", TimeValue (Seconds (statsStartTime)));

  rlcStats->SetAttribute ("EpochDuration", TimeValue (Seconds (statsDuration)));

  Simulator::Run ();

  /**

   * Check that the downlink assignation is done in a "token bank fair queue" manner

   */

  NS_LOG_INFO ("DL - Test with " << m_nUser << " user(s) at distance " << m_dist);

  std::vector <uint64_t> dlDataRxed;

  for (int i = 0; i < m_nUser; i++)

    {

      // get the imsi

      uint64_t imsi = ueDevs.Get (i)->GetObject<LteUeNetDevice> ()->GetImsi ();

      // get the lcId

      uint8_t lcId = 4;

      uint64_t data = rlcStats->GetDlRxData (imsi, lcId);

      dlDataRxed.push_back (data);

      NS_LOG_INFO ("\tUser " << i << " imsi " << imsi << " bytes rxed " << (double)dlDataRxed.at (i) << "  thr " << (double)dlDataRxed.at (i) / statsDuration << " ref " << m_thrRefDl);

    }

  for (int i = 0; i < m_nUser; i++)

    {

      NS_TEST_ASSERT_MSG_EQ_TOL ((double)dlDataRxed.at (i) / statsDuration, m_thrRefDl, m_thrRefDl * tolerance, " Unfair Throughput!");

    }

  /**

  * Check that the uplink assignation is done in a "round robin" manner

  */

  NS_LOG_INFO ("UL - Test with " << m_nUser << " user(s) at distance " << m_dist);

  std::vector <uint64_t> ulDataRxed;

  for (int i = 0; i < m_nUser; i++)

    {

      // get the imsi

      uint64_t imsi = ueDevs.Get (i)->GetObject<LteUeNetDevice> ()->GetImsi ();

      // get the lcId

      uint8_t lcId = 4;

      ulDataRxed.push_back (rlcStats->GetUlRxData (imsi, lcId));

      NS_LOG_INFO ("\tUser " << i << " imsi " << imsi << " bytes rxed " << (double)ulDataRxed.at (i) << "  thr " << (double)ulDataRxed.at (i) / statsDuration << " ref " << m_thrRefUl);

    }

  for (int i = 0; i < m_nUser; i++)

    {

      NS_TEST_ASSERT_MSG_EQ_TOL ((double)ulDataRxed.at (i) / statsDuration, m_thrRefUl, m_thrRefUl * tolerance, " Unfair Throughput!");

    }

  Simulator::Destroy ();

}

// --------------- T E S T - C A S E   # 2 ------------------------------

std::string 

LenaFdTbfqFfMacSchedulerTestCase2::BuildNameString (uint16_t nUser, std::vector<uint16_t> dist)

{

  std::ostringstream oss;

  oss << "distances (m) = [ " ;

  for (std::vector<uint16_t>::iterator it = dist.begin (); it != dist.end (); ++it)

    {

      oss << *it << " ";

    }

  oss << "]";

  return oss.str ();

}

LenaFdTbfqFfMacSchedulerTestCase2::LenaFdTbfqFfMacSchedulerTestCase2 (std::vector<uint16_t> dist, std::vector<uint32_t> estThrFdTbfqDl, std::vector<uint16_t> packetSize, uint16_t interval,bool errorModelEnabled)

  : TestCase (BuildNameString (dist.size (), dist)),

    m_nUser (dist.size ()),

    m_dist (dist),

    m_packetSize (packetSize),

    m_interval (interval),

    m_estThrFdTbfqDl (estThrFdTbfqDl),

    m_errorModelEnabled (errorModelEnabled)

{

}

LenaFdTbfqFfMacSchedulerTestCase2::~LenaFdTbfqFfMacSchedulerTestCase2 ()

{

}

void

LenaFdTbfqFfMacSchedulerTestCase2::DoRun (void)

{

  if (!m_errorModelEnabled)

    {

      Config::SetDefault ("ns3::LteSpectrumPhy::CtrlErrorModelEnabled", BooleanValue (false));

      Config::SetDefault ("ns3::LteSpectrumPhy::DataErrorModelEnabled", BooleanValue (false));

    }