rrpaa-wifi-manager.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2017 Universidad de la República - Uruguay
 *
 * 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: Matías Richart <mrichart@fing.edu.uy>
 */

#ifndef RRPAA_WIFI_MANAGER_H
#define RRPAA_WIFI_MANAGER_H

#include "ns3/nstime.h"
#include "ns3/random-variable-stream.h"
#include "wifi-remote-station-manager.h"

namespace ns3 {

struct RrpaaWifiRemoteStation;

struct WifiRrpaaThresholds
{
  double m_ori; 
  double m_mtl; 
  uint32_t m_ewnd; 
};

typedef std::vector<std::pair<WifiRrpaaThresholds,WifiMode> > RrpaaThresholdsTable;

typedef std::vector<std::vector<double> > RrpaaProbabilitiesTable;

class RrpaaWifiManager : public WifiRemoteStationManager
{
public:
  static TypeId GetTypeId (void);
  RrpaaWifiManager ();
  virtual ~RrpaaWifiManager ();

  // Inherited from WifiRemoteStationManager
  virtual void SetupPhy (const Ptr<WifiPhy> phy);
  virtual void SetupMac (const Ptr<WifiMac> mac);

  int64_t AssignStreams (int64_t stream);

private:
  // Overridden from base class.
  void DoInitialize (void);
  virtual WifiRemoteStation * DoCreateStation (void) const;
  virtual void DoReportRxOk (WifiRemoteStation *station,
                             double rxSnr, WifiMode txMode);
  virtual void DoReportRtsFailed (WifiRemoteStation *station);
  virtual void DoReportDataFailed (WifiRemoteStation *station);
  virtual void DoReportRtsOk (WifiRemoteStation *station,
                              double ctsSnr, WifiMode ctsMode, double rtsSnr);
  virtual void DoReportDataOk (WifiRemoteStation *station,
                               double ackSnr, WifiMode ackMode, double dataSnr);
  virtual void DoReportFinalRtsFailed (WifiRemoteStation *station);
  virtual void DoReportFinalDataFailed (WifiRemoteStation *station);
  virtual WifiTxVector DoGetDataTxVector (WifiRemoteStation *station);
  virtual WifiTxVector DoGetRtsTxVector (WifiRemoteStation *station);
  virtual bool DoNeedRts (WifiRemoteStation *st,
                          Ptr<const Packet> packet, bool normally);
  virtual bool IsLowLatency (void) const;

  void CheckInit (RrpaaWifiRemoteStation *station);

  void CheckTimeout (RrpaaWifiRemoteStation *station);
  void RunBasicAlgorithm (RrpaaWifiRemoteStation *station);
  void RunAdaptiveRtsAlgorithm (RrpaaWifiRemoteStation *station);
  void ResetCountersBasic (RrpaaWifiRemoteStation *station);

  void InitThresholds (RrpaaWifiRemoteStation *station);

  WifiRrpaaThresholds GetThresholds (RrpaaWifiRemoteStation *station, WifiMode mode) const;

  WifiRrpaaThresholds GetThresholds (RrpaaWifiRemoteStation *station, uint8_t rate) const;

  Time GetCalcTxTime (WifiMode mode) const;
  void AddCalcTxTime (WifiMode mode, Time t);

  typedef std::vector<std::pair<Time,WifiMode> > TxTime;

  TxTime m_calcTxTime;     
  Time m_sifs;             
  Time m_difs;             

  uint32_t m_frameLength;  
  uint32_t m_ackLength;    

  bool m_basic;            
  Time m_timeout;          
  double m_alpha;          
  double m_beta;           
  double m_tau;            
  double m_gamma;          
  double m_delta;          

  uint8_t m_minPowerLevel;     
  uint8_t m_maxPowerLevel;     
  uint8_t m_nPowerLevels;      

  TracedCallback<double, double, Mac48Address> m_powerChange;
  TracedCallback<DataRate, DataRate, Mac48Address> m_rateChange;

  Ptr<UniformRandomVariable> m_uniformRandomVariable; 
};

} //namespace ns3

#endif /* RRPAA__WIFI_MANAGER_H */