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

/*

 * Copyright (c) 2010 TELEMATICS LAB, DEE - Politecnico di Bari

 *

 * 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: Giuseppe Piro  <g.piro@poliba.it>

 *         Marco Miozzo <mmiozzo@cttc.es>

 */

#include <ns3/waveform-generator.h>

#include <ns3/object-factory.h>

#include <ns3/log.h>

#include <math.h>

#include <ns3/simulator.h>

#include "ns3/spectrum-error-model.h"

#include "lte-phy.h"

#include "lte-net-device.h"

NS_LOG_COMPONENT_DEFINE ("LtePhy");

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (LtePhy);

LtePhy::LtePhy ()

{

  NS_LOG_FUNCTION (this);

  NS_FATAL_ERROR ("This constructor should not be called");

}

LtePhy::LtePhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy)

  : m_downlinkSpectrumPhy (dlPhy),

    m_uplinkSpectrumPhy (ulPhy),

    m_tti (0.001),

    m_ulBandwidth (0),

    m_dlBandwidth (0),

    m_rbgSize (0),

    m_macChTtiDelay (0),

    m_cellId (0)

{

  NS_LOG_FUNCTION (this);

}

TypeId

LtePhy::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::LtePhy")

    .SetParent<Object> ()

  ;

  return tid;

}

LtePhy::~LtePhy ()

{

  NS_LOG_FUNCTION (this);

}

void

LtePhy::DoDispose ()

{

  NS_LOG_FUNCTION (this);

  m_packetBurstQueue.clear ();

  m_controlMessagesQueue.clear ();

  m_downlinkSpectrumPhy->Dispose ();

  m_downlinkSpectrumPhy = 0;

  m_uplinkSpectrumPhy->Dispose ();

  m_uplinkSpectrumPhy = 0;

  m_netDevice = 0;

  Object::DoDispose ();

}

void

LtePhy::SetDevice (Ptr<LteNetDevice> d)

{

  NS_LOG_FUNCTION (this << d);

  m_netDevice = d;

}

Ptr<LteNetDevice>

LtePhy::GetDevice ()

{

  NS_LOG_FUNCTION (this);

  return m_netDevice;

}

Ptr<LteSpectrumPhy> 

LtePhy::GetDownlinkSpectrumPhy ()

{

  return m_downlinkSpectrumPhy;

}

Ptr<LteSpectrumPhy> 

LtePhy::GetUplinkSpectrumPhy ()

{

  return m_uplinkSpectrumPhy;

}

void

LtePhy::SetDownlinkChannel (Ptr<SpectrumChannel> c)

{

  NS_LOG_FUNCTION (this << c);

  m_downlinkSpectrumPhy->SetChannel (c);

}

void

LtePhy::SetUplinkChannel (Ptr<SpectrumChannel> c)

{

  NS_LOG_FUNCTION (this << c);

  m_uplinkSpectrumPhy->SetChannel (c);

}

void

LtePhy::SetTti (double tti)

{

  NS_LOG_FUNCTION (this << tti);

  m_tti = tti;

}

double

LtePhy::GetTti (void) const

{

  NS_LOG_FUNCTION (this << m_tti);

  return m_tti;

}

uint16_t

LtePhy::GetSrsPeriodicity (uint16_t srcCi) const

{

  // from 3GPP TS 36.213 table 8.2-1 UE Specific SRS Periodicity

  uint16_t SrsPeriodicity[9] = {0, 2, 5, 10, 20, 40, 80, 160, 320};

  uint16_t SrsCiLow[9] = {0, 0, 2, 7, 17, 37, 77, 157, 317};

  uint16_t SrsCiHigh[9] = {0, 1, 6, 16, 36, 76, 156, 316, 636};

  uint8_t i;

  for (i = 8; i > 0; i --)

    {

      if ((srcCi>=SrsCiLow[i])&&(srcCi<=SrsCiHigh[i]))

        {

          break;

        }

    }

  return SrsPeriodicity[i];

}

uint16_t

LtePhy::GetSrsSubframeOffset (uint16_t srcCi) const

{

  // from 3GPP TS 36.213 table 8.2-1 UE Specific SRS Periodicity

  uint16_t SrsSubframeOffset[9] = {0, 0, 2, 7, 17, 37, 77, 157, 317};

  uint16_t SrsCiLow[9] = {0, 0, 2, 7, 17, 37, 77, 157, 317};

  uint16_t SrsCiHigh[9] = {0, 1, 6, 16, 36, 76, 156, 316, 636};

  uint8_t i;

  for (i = 8; i > 0; i --)

    {

      if ((srcCi>=SrsCiLow[i])&&(srcCi<=SrsCiHigh[i]))

        {

          break;

        }

    }

  return (srcCi - SrsSubframeOffset[i]);

}

uint8_t

LtePhy::GetRbgSize (void) const

{

  return m_rbgSize;

}

void

LtePhy::SetMacPdu (Ptr<Packet> p)

{

  m_packetBurstQueue.at (m_packetBurstQueue.size () - 1)->AddPacket (p);

}

Ptr<PacketBurst>

LtePhy::GetPacketBurst (void)

{

  if (m_packetBurstQueue.at (0)->GetSize () > 0)

    {

      Ptr<PacketBurst> ret = m_packetBurstQueue.at (0)->Copy ();

      m_packetBurstQueue.erase (m_packetBurstQueue.begin ());

      m_packetBurstQueue.push_back (CreateObject <PacketBurst> ());

      return (ret);

    }

  else

    {

      m_packetBurstQueue.erase (m_packetBurstQueue.begin ());

      m_packetBurstQueue.push_back (CreateObject <PacketBurst> ());

      return (0);

    }

}

void

LtePhy::SetControlMessages (Ptr<LteControlMessage> m)

{

  // In uplink the queue of control messages and packet are of different sizes

  // for avoiding TTI cancellation due to synchronization of subframe triggers

  m_controlMessagesQueue.at (m_controlMessagesQueue.size () - 1).push_back (m);

}

std::list<Ptr<LteControlMessage> >

LtePhy::GetControlMessages (void)

{

  NS_LOG_FUNCTION (this);

  if (m_controlMessagesQueue.at (0).size () > 0)

    {

      std::list<Ptr<LteControlMessage> > ret = m_controlMessagesQueue.at (0);

      m_controlMessagesQueue.erase (m_controlMessagesQueue.begin ());

      std::list<Ptr<LteControlMessage> > newlist;

      m_controlMessagesQueue.push_back (newlist);

      return (ret);

    }

  else

    {

      m_controlMessagesQueue.erase (m_controlMessagesQueue.begin ());

      std::list<Ptr<LteControlMessage> > newlist;

      m_controlMessagesQueue.push_back (newlist);

      std::list<Ptr<LteControlMessage> > emptylist;

      return (emptylist);

    }

}

void

LtePhy::DoSetCellId (uint16_t cellId)

{

  m_cellId = cellId;

  m_downlinkSpectrumPhy->SetCellId (cellId);

  m_uplinkSpectrumPhy->SetCellId (cellId);

}

} // namespace ns3