/* -*-  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 "lte-test-tta-ff-mac-scheduler.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>

NS_LOG_COMPONENT_DEFINE ("LenaTestTtaFfMacCheduler");

using namespace ns3;

LenaTestTtaFfMacSchedulerSuite::LenaTestTtaFfMacSchedulerSuite ()

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

{

  NS_LOG_INFO ("creating LenaTestTtaFfMacSchedulerSuite");

  //Test Case : AMC works in TTA

  // DOWNLINK - DISTANCE 0 -> MCS 28 -> Itbs 26 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 26 -> 2196 -> 2196000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 3 users -> 2196000 among 3 users -> 2196000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 6 users -> 2196000 among 6 users -> 2196000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 12 users -> 2196000 among 12 users -> 2196000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 15 users -> 2196000 among 15 users -> 2196000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // UPLINK- DISTANCE 0 -> MCS 28 -> Itbs 26 (from table 7.1.7.2.1-1 of 36.213)

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

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

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

  // 12 users -> 2 PRB at Itbs 26 -> 185 -> 185000 bytes/sec

  // 15 users -> 1 PRB at Itbs 26 -> 89 -> 89000 bytes/sec

  // DOWNLINK - DISTANCE 3000 -> MCS 24 -> Itbs 30 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 20 -> 1383 -> 1383000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 3 users -> 1383000 among 3 users -> 1383000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 6 users -> 1383000 among 6 users -> 1383000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 12 users -> 1383000 among 12 users -> 1383000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 15 users -> 1383000 among 15 users -> 1383000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // UPLINK - DISTANCE 3000 -> MCS 20 -> Itbs 18 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 25 PRB at Itbs 18 -> 1239 -> 1239000 bytes/sec

  // 3 users -> 8 PRB at Itbs 18 -> 389 -> 389000 bytes/sec

  // 6 users -> 4 PRB at Itbs 18 -> 193 -> 193000 bytes/sec

  // 12 users -> 2 PRB at Itbs 18 -> 97 -> 97000 bytes/sec

  // 15 users -> 1 PRB at Itbs 18 -> 47 -> 47000 bytes/sec 

  // DOWNLINK - DISTANCE 6000 -> MCS 16 -> Itbs 15 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 15 -> 903 -> 903000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 3 users -> 903000 among 3 users -> 903000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 6 users -> 903000 among 6 users -> 903000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 12 users -> 903000 among 12 users -> 903000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 15 users -> 903000 among 15 users -> 903000 bytes/sec for first UE; 0 bytes/sec for other UEs

  // 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 bytes/sec

  // 3 users -> 8 PRB at Itbs 11 -> 201 -> 201000 bytes/sec

  // 6 users -> 4 PRB at Itbs 11 -> 97 -> 97000 bytes/sec

  // 12 users -> 2 PRB at Itbs 11 -> 47 -> 47000 bytes/sec

  // 15 users -> 1 PRB at Itbs 11 -> 22 -> 22000 bytes/sec

  // DOWNLINK - DISTANCE 9000 -> MCS 12 -> Itbs 11 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 11 -> 597 -> 597000 bytes/sec

  // 3 users -> 597000 among 3 users -> 199000 bytes/sec

  // 6 users -> 597000 among 6 users -> 99500 bytes/sec

  // 12 users -> 597000 among 12 users -> 49750 bytes/sec

  // 15 users -> 597000 among 15 users -> 39800 bytes/sec 

  // UPLINK - DISTANCE 9000 -> MCS 8 -> Itbs 8 (from table 7.1.7.2.1-1 of 36.213)

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

  // 3 users -> 8 PRB at Itbs 8 -> 137 -> 137000 bytes/sec

  // 6 users -> 4 PRB at Itbs 8 -> 67 -> 67000 bytes/sec

  // 12 users -> 2 PRB at Itbs 8 -> 32 -> 32000 bytes/sec

  // 15 users -> 1 PRB at Itbs 8 -> 15 -> 15000 bytes/sec 

  // DONWLINK - DISTANCE 15000 -> MCS 6 -> Itbs 6 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 24 PRB at Itbs 6 -> 309 -> 309000 bytes/sec

  // 3 users -> 309000 among 3 users -> 103000 bytes/sec

  // 6 users -> 309000 among 6 users -> 51500 bytes/sec

  // 12 users -> 309000 among 12 users -> 25750 bytes/sec

  // 15 users -> 309000 among 15 users -> 20600 bytes/sec

  // UPLINK - DISTANCE 15000 -> MCS 6 -> Itbs 6 (from table 7.1.7.2.1-1 of 36.213)

  // 1 user -> 25 PRB at Itbs 6 -> 233 -> 233000 bytes/sec

  // 3 users -> 8 PRB at Itbs 6 -> 69 -> 69000 bytes/sec

  // 6 users -> 4 PRB at Itbs 6 -> 32 -> 32000 bytes/sec

  // 12 users -> 2 PRB at Itbs 6 -> 15 -> 15000 bytes/sec

  // 15 users -> 1 PRB at Itbs 6 -> 7 -> 7000 bytes/sec

}

static LenaTestTtaFfMacSchedulerSuite lenaTestTtaFfMacSchedulerSuite;

// --------------- T E S T - C A S E ------------------------------

std::string 

LenaTtaFfMacSchedulerTestCase::BuildNameString (uint16_t nUser, uint16_t dist)

{

  std::ostringstream oss;

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

  return oss.str ();

}

LenaTtaFfMacSchedulerTestCase::LenaTtaFfMacSchedulerTestCase (uint16_t nUser, uint16_t nLc, uint16_t dist, double thrRefDl, double thrRefUl)

  : TestCase (BuildNameString (nUser, dist)),

    m_nUser (nUser),

    m_nLc (nLc),

    m_dist (dist),

    m_thrRefDl (thrRefDl),

    m_thrRefUl (thrRefUl)

{

}

LenaTtaFfMacSchedulerTestCase::~LenaTtaFfMacSchedulerTestCase ()

{

}

void

LenaTtaFfMacSchedulerTestCase::DoRun (void)

{

  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));

  LogComponentDisableAll (LOG_LEVEL_ALL);

  //LogComponentEnable ("LenaTestTtaFfMacCheduler", LOG_LEVEL_ALL);

  /**

   * 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::TtaFfMacScheduler");

  enbDevs = lteHelper->InstallEnbDevice (enbNodes);

  ueDevs = lteHelper->InstallUeDevice (ueNodes);

  // Attach a UE to a eNB

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

  // Activate an EPS bearer

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

  EpsBearer bearer (q);

  lteHelper->ActivateEpsBearer (ueDevs, bearer, EpcTft::Default ());

  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));

    }

  lteHelper->EnableRlcTraces ();

  double simulationTime = 1.0;

  double tolerance = 0.1;

  Simulator::Stop (Seconds (simulationTime));

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

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

  Simulator::Run ();

  /**

   * Check that the downlink assignation is done in a "throughput to average" 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 = ueDevs.Get (i)->GetObject<LteUeNetDevice> ()->GetRrc ()->GetLcIdVector ().at (0);

      dlDataRxed.push_back (rlcStats->GetDlRxData (imsi, lcId));

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

    }

  /**

  * Check that the assignation is done in a "throughput to average" manner among users

  * with equal SINRs: all bandwidth should be allocated to the first UE in script

  */

  for (int i = 0; i < 1; i++)

    {

      if (i == 0)

        {

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

        }

      else

        {

          NS_TEST_ASSERT_MSG_EQ_TOL ((double)dlDataRxed.at (i) / simulationTime, 0, tolerance, " Invalid Throughput!");

        }

    }

  /**

  * Check that the uplink assignation is done in a "throughput to average" 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 = ueDevs.Get (i)->GetObject<LteUeNetDevice> ()->GetRrc ()->GetLcIdVector ().at (0);

      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) / simulationTime << " ref " << m_thrRefUl);

    }

  /**

  * Check that the assignation is done in a "throughput to average" manner among users

  * with equal SINRs: the bandwidht should be distributed according to the 

  * ratio of the estimated throughput per TTI of each user; therefore equally 

  * partitioning the whole bandwidth achievable from a single users in a TTI

  *

  */

  for (int i = 0; i < 1; i++)

    {

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

    }

  Simulator::Destroy ();

}