/* -*-  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: Manuel Requena <manuel.requena@cttc.es>

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

 */

#include "lte-common.h"

#include <ns3/log.h>

#include <ns3/abort.h>

namespace ns3 {

LteFlowId_t::LteFlowId_t ()

{

}

LteFlowId_t::LteFlowId_t (const uint16_t a, const uint8_t b)

  : m_rnti (a),

    m_lcId (b)

{

}

bool

operator == (const LteFlowId_t &a, const LteFlowId_t &b)

{

  return ( (a.m_rnti == b.m_rnti) && (a.m_lcId == b.m_lcId) );

}

bool

operator < (const LteFlowId_t& a, const LteFlowId_t& b)

{

  return ( (a.m_rnti < b.m_rnti) || ( (a.m_rnti == b.m_rnti) && (a.m_lcId < b.m_lcId) ) );

}

ImsiLcidPair_t::ImsiLcidPair_t ()

{

}

ImsiLcidPair_t::ImsiLcidPair_t (const uint64_t a, const uint8_t b)

  : m_imsi (a),

    m_lcId (b)

{

}

bool

operator == (const ImsiLcidPair_t &a, const ImsiLcidPair_t &b)

{

  return ((a.m_imsi == b.m_imsi) && (a.m_lcId == b.m_lcId));

}

bool

operator < (const ImsiLcidPair_t& a, const ImsiLcidPair_t& b)

{

  return ((a.m_imsi < b.m_imsi) || ((a.m_imsi == b.m_imsi) && (a.m_lcId

                                                               < b.m_lcId)));

}

LteUeConfig_t::LteUeConfig_t ()

{

}

bool

operator == (const LteUeConfig_t &a, const LteUeConfig_t &b)

{

  return (a.m_rnti == b.m_rnti);

}

bool

operator < (const LteUeConfig_t& a, const LteUeConfig_t& b)

{

  return (a.m_rnti < b.m_rnti);

}

uint16_t

LteFfConverter::double2fpS11dot3 (double val)

{

  // convert from double to fixed point notation Sxxxxxxxxxxx.xxx

  // truncate val to notation limits

  if (val > 4095.88)

    {

      val = 4095.88;

    }

  if (val < -4096)

    {

      val = -4096;

    }

  int16_t valFp = (int16_t)(val * 8);

  return (valFp);

}

double

LteFfConverter::fpS11dot3toDouble (uint16_t val)

{

  // convert from fixed point notation Sxxxxxxxxxxx.xxx to double

  double valD = ((int16_t)val) / 8.0;

  return (valD);

}

double 

LteFfConverter::getMinFpS11dot3Value ()

{

  return (-4096);        // -4096 = 0x8000 = 1000 0000 0000 0000 b

}

//static double g_lowestFpS11dot3Value = -4096; // 0x8001 (1000 0000 0000 0000)

static const uint32_t BufferSizeLevelBsrTable[64] = {

  0, 10, 12, 14, 17, 19, 22, 26, 31, 36, 42, 49, 57, 67, 78, 91, 

  107, 125, 146, 171, 200, 234, 274, 321, 376, 440, 515, 603, 

  706, 826, 967, 1132, 1326, 1552, 1817, 2127, 2490, 2915, 3413,

  3995, 4677, 5476, 6411, 7505, 8787, 10287, 12043, 14099, 16507,

  19325, 22624, 26487, 31009, 36304, 42502, 49759, 58255,

  68201, 79846, 93749, 109439, 128125, 150000, 150000

};

uint32_t

BufferSizeLevelBsr::BsrId2BufferSize (uint8_t val)

{

  NS_ABORT_MSG_UNLESS (val < 64, "val = " << val << " is out of range");

  return BufferSizeLevelBsrTable[val];

}

uint8_t

BufferSizeLevelBsr::BufferSize2BsrId (uint32_t val)

{

  int index = 0;

  if (BufferSizeLevelBsrTable[63] < val)

    {

      index = 63;

    }

  else

    {

      while (BufferSizeLevelBsrTable[index] < val)

        {

          NS_ASSERT (index < 64);

          index++;

        }

    }

  return (index);

}

uint8_t

TransmissionModesLayers::TxMode2LayerNum (uint8_t txMode)

{

  uint8_t nLayer = 0;

  switch (txMode)

    {

    case 0: // Tx MODE 1: SISO

      nLayer = 1;

      break;

    case 1: // Tx MODE 2: MIMO Tx Diversity

      nLayer = 1;

      break;

    case 2: // Tx MODE 3: MIMO Spatial Multiplexity Open Loop

      nLayer = 2;

      break;

    case 3: // Tx MODE 4: MIMO Spatial Multiplexity Closed Loop

      nLayer = 2;

      break;

    case 4: // Tx MODE 5: MIMO Multi-User

      nLayer = 2;

      break;

    case 5: // Tx MODE 6: Closer loop single layer percoding

      nLayer = 1;

      break;

    case 6: // Tx MODE 7: Single antenna port 5

      nLayer = 1;

      break;

    }

  return (nLayer);

}

double 

EutranMeasurementMapping::RsrpRange2Dbm (uint8_t range)

{

  // 3GPP TS 36.133 section 9.1.4 RSRP Measurement Report Mapping

  NS_ASSERT_MSG (range <= 97, "value " << range << " is out of range");

  return (double) range - 141.0;

}

uint8_t 

EutranMeasurementMapping::Dbm2RsrpRange (double dbm)

{

  // 3GPP TS 36.133 section 9.1.4 RSRP Measurement Report Mapping

  double range = std::min (std::max (std::floor (dbm + 141), 0.0), 97.0);

  return (uint8_t) range;

}

double 

EutranMeasurementMapping::RsrqRange2Db (uint8_t range)

{

  // 3GPP TS 36.133 section 9.1.7 RSRQ Measurement Report Mapping

  NS_ASSERT_MSG (range <= 34, "value " << (uint16_t) range << " is out of range");

  return ((double) range - 40.0)*0.5;

}

uint8_t 

EutranMeasurementMapping::Db2RsrqRange (double db)

{

  // 3GPP TS 36.133 section 9.1.7 RSRQ Measurement Report Mapping

  double range = std::min (std::max (std::floor (db*2 + 40), 0.0), 34.0);

  return (uint8_t) range;

}

double 

EutranMeasurementMapping::QuantizeRsrp (double v)

{

  return RsrpRange2Dbm (Dbm2RsrpRange (v));

}

double 

EutranMeasurementMapping::QuantizeRsrq (double v)

{

  return RsrqRange2Db (Db2RsrqRange (v));

}

double

EutranMeasurementMapping::IeValue2ActualHysteresis (uint8_t hysteresisIeValue)

{

  if (hysteresisIeValue > 30)

    {

      NS_FATAL_ERROR ("The value " << (uint16_t) hysteresisIeValue

                                   << " is out of the allowed range (0..30)"

                                   << " for Hysteresis IE value");

    }

  double actual = static_cast<double> (hysteresisIeValue) * 0.5;

  NS_ASSERT (actual >= 0.0);

  NS_ASSERT (actual <= 15.0);

  return actual;

}

uint8_t

EutranMeasurementMapping::ActualHysteresis2IeValue (double hysteresisDb)

{

  if ((hysteresisDb < 0.0) || (hysteresisDb > 15.0))

    {

      NS_FATAL_ERROR ("The value " << hysteresisDb

                                   << " is out of the allowed range (0..15) dB"

                                   << " for hysteresis");

    }

  uint8_t ieValue = lround (hysteresisDb * 2.0);

  NS_ASSERT (ieValue <= 30);

  return ieValue;

}

double

EutranMeasurementMapping::IeValue2ActualA3Offset (int8_t a3OffsetIeValue)

{

  if ((a3OffsetIeValue < -30) || (a3OffsetIeValue > 30))

    {

      NS_FATAL_ERROR ("The value " << (int16_t) a3OffsetIeValue

                                   << " is out of the allowed range (-30..30)"

                                   << " for a3-Offset IE value");

    }

  double actual = static_cast<double> (a3OffsetIeValue) * 0.5;

  NS_ASSERT (actual >= -15.0);

  NS_ASSERT (actual <= 15.0);

  return actual;

}

int8_t

EutranMeasurementMapping::ActualA3Offset2IeValue (double a3OffsetDb)

{

  if ((a3OffsetDb < -15.0) || (a3OffsetDb > 15.0))

    {

      NS_FATAL_ERROR ("The value " << a3OffsetDb

                                   << " is out of the allowed range (-15..15) dB"

                                   << " for A3 Offset");

    }

  int8_t ieValue = lround (a3OffsetDb * 2.0);

  NS_ASSERT (ieValue >= -30);

  NS_ASSERT (ieValue <= 30);

  return ieValue;

}

double

EutranMeasurementMapping::IeValue2ActualQRxLevMin (int8_t qRxLevMinIeValue)

{

  if ((qRxLevMinIeValue < -70) || (qRxLevMinIeValue > -22))

    {

      NS_FATAL_ERROR ("The value " << (int16_t) qRxLevMinIeValue

                                   << " is out of the allowed range (-70..-22)"

                                   << " for Q-RxLevMin IE value");

    }

  double actual = static_cast<double> (qRxLevMinIeValue) * 2;

  NS_ASSERT (actual >= -140.0);

  NS_ASSERT (actual <= -44.0);

  return actual;

}

double

EutranMeasurementMapping::IeValue2ActualQQualMin (int8_t qQualMinIeValue)

{

  if ((qQualMinIeValue < -34) || (qQualMinIeValue > -3))

    {

      NS_FATAL_ERROR ("The value " << (int16_t) qQualMinIeValue

                                   << " is out of the allowed range (-34..-3)"

                                   << " for Q-QualMin IE value");

    }

  double actual = static_cast<double> (qQualMinIeValue);

  NS_ASSERT (actual >= -34.0);

  NS_ASSERT (actual <= -3.0);

  return actual;

}

}; // namespace ns3