lte-rlc-um.h

Go to the documentation of this file.

/* -*-  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>
 */
 
#ifndef LTE_RLC_UM_H
#define LTE_RLC_UM_H
 
#include "ns3/lte-rlc-sequence-number.h"
#include "ns3/lte-rlc.h"
 
#include <ns3/event-id.h>
#include <map>
 
namespace ns3 {
 
class LteRlcUm : public LteRlc
{
public:
  LteRlcUm ();
  virtual ~LteRlcUm ();
  static TypeId GetTypeId (void);
  virtual void DoDispose ();
 
  virtual void DoTransmitPdcpPdu (Ptr<Packet> p);
 
  virtual void DoNotifyTxOpportunity (LteMacSapUser::TxOpportunityParameters txOpParams);
  virtual void DoNotifyHarqDeliveryFailure ();
  virtual void DoReceivePdu (LteMacSapUser::ReceivePduParameters rxPduParams);
 
private:
  void ExpireReorderingTimer (void);
  void ExpireRbsTimer (void);
 
  bool IsInsideReorderingWindow (SequenceNumber10 seqNumber);
 
  void ReassembleOutsideWindow (void);
  void ReassembleSnInterval (SequenceNumber10 lowSeqNumber, SequenceNumber10 highSeqNumber);
 
  void ReassembleAndDeliver (Ptr<Packet> packet);
 
  void DoReportBufferStatus ();
 
private:
  uint32_t m_maxTxBufferSize; 
  uint32_t m_txBufferSize; 
  struct TxPdu
  {
    TxPdu (const Ptr<Packet> &pdu, const Time &time) :
      m_pdu (pdu),
      m_waitingSince (time)
    { }
 
    TxPdu () = delete;
 
    Ptr<Packet> m_pdu;           
    Time        m_waitingSince;  
  };
 
  std::vector < TxPdu > m_txBuffer; 
  std::map <uint16_t, Ptr<Packet> > m_rxBuffer; 
  std::vector < Ptr<Packet> > m_reasBuffer;     
 
  std::list < Ptr<Packet> > m_sdusBuffer;       
 
  SequenceNumber10 m_sequenceNumber; 
 
  SequenceNumber10 m_vrUr;           
  SequenceNumber10 m_vrUx;           
  SequenceNumber10 m_vrUh;           
 
  uint16_t m_windowSize; 
 
  Time    m_reorderingTimerValue; 
  EventId m_reorderingTimer; 
  EventId m_rbsTimer; 
 
  typedef enum { NONE            = 0,
                 WAITING_S0_FULL = 1,
                 WAITING_SI_SF   = 2 } ReassemblingState_t;
  ReassemblingState_t m_reassemblingState; 
  Ptr<Packet> m_keepS0; 
 
  SequenceNumber10 m_expectedSeqNumber;
 
};
 
 
} // namespace ns3
 
#endif // LTE_RLC_UM_H