wifi-phy.h

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2005,2006 INRIA
 *
 * 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
 *
 * Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 *          Sébastien Deronne <sebastien.deronne@gmail.com>
 */
 
#ifndef WIFI_PHY_H
#define WIFI_PHY_H
 
#include "ns3/error-model.h"
#include "wifi-standards.h"
#include "interference-helper.h"
#include "wifi-phy-state-helper.h"
#include "phy-entity.h"
#include "wifi-phy-operating-channel.h"
 
namespace ns3 {
 
class Channel;
class NetDevice;
class MobilityModel;
class WifiPhyStateHelper;
class FrameCaptureModel;
class PreambleDetectionModel;
class WifiRadioEnergyModel;
class UniformRandomVariable;
 
class WifiPhy : public Object
{
public:
  friend class PhyEntity;
  static TypeId GetTypeId (void);
 
  WifiPhy ();
  virtual ~WifiPhy ();
 
  static const std::set<FrequencyChannelInfo> m_frequencyChannels;  
 
  Ptr<WifiPhyStateHelper> GetState (void) const;
 
  void SetReceiveOkCallback (RxOkCallback callback);
  void SetReceiveErrorCallback (RxErrorCallback callback);
 
  void RegisterListener (WifiPhyListener *listener);
  void UnregisterListener (WifiPhyListener *listener);
 
  void SetCapabilitiesChangedCallback (Callback<void> callback);
 
  void StartReceivePreamble (Ptr<WifiPpdu> ppdu, RxPowerWattPerChannelBand rxPowersW, Time rxDuration);
 
  void ResetReceive (Ptr<Event> event);
 
  void EndReceiveInterBss (void);
 
  static WifiConstPsduMap GetWifiConstPsduMap (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
 
  void Send (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
  void Send (WifiConstPsduMap psdus, WifiTxVector txVector);
 
  virtual void StartTx (Ptr<WifiPpdu> ppdu) = 0;
 
  void SetSleepMode (void);
  void ResumeFromSleep (void);
  void SetOffMode (void);
  void ResumeFromOff (void);
 
  bool IsStateIdle (void) const;
  bool IsStateCcaBusy (void) const;
  bool IsStateRx (void) const;
  bool IsStateTx (void) const;
  bool IsStateSwitching (void) const;
  bool IsStateSleep (void) const;
  bool IsStateOff (void) const;
 
  Time GetDelayUntilIdle (void);
 
  Time GetLastRxStartTime (void) const;
  Time GetLastRxEndTime (void) const;
 
  static Time CalculateTxDuration (uint32_t size, const WifiTxVector& txVector, WifiPhyBand band,
                                   uint16_t staId = SU_STA_ID);
  static Time CalculateTxDuration (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector, WifiPhyBand band);
  static Time CalculateTxDuration (WifiConstPsduMap psduMap, const WifiTxVector& txVector, WifiPhyBand band);
 
  static Time CalculatePhyPreambleAndHeaderDuration (const WifiTxVector& txVector);
  static Time GetPreambleDetectionDuration (void);
  static Time GetPayloadDuration (uint32_t size, const WifiTxVector& txVector, WifiPhyBand band, MpduType mpdutype = NORMAL_MPDU,
                                  uint16_t staId = SU_STA_ID);
  static Time GetPayloadDuration (uint32_t size, const WifiTxVector& txVector, WifiPhyBand band, MpduType mpdutype,
                                  bool incFlag, uint32_t &totalAmpduSize, double &totalAmpduNumSymbols,
                                  uint16_t staId);
  static Time GetStartOfPacketDuration (const WifiTxVector& txVector);
 
  std::list<WifiMode> GetModeList (void) const;
  std::list<WifiMode> GetModeList (WifiModulationClass modulation) const;
  bool IsModeSupported (WifiMode mode) const;
  WifiMode GetDefaultMode (void) const;
  bool IsMcsSupported (WifiModulationClass modulation, uint8_t mcs) const;
 
  double CalculateSnr (const WifiTxVector& txVector, double ber) const;
 
  void SetSifs (Time sifs);
  Time GetSifs (void) const;
  void SetSlot (Time slot);
  Time GetSlot (void) const;
  void SetPifs (Time pifs);
  Time GetPifs (void) const;
  Time GetAckTxTime (void) const;
  Time GetBlockAckTxTime (void) const;
 
  static uint32_t GetMaxPsduSize (WifiModulationClass modulation);
 
  std::list<uint8_t> GetBssMembershipSelectorList (void) const;
  uint16_t GetNMcs (void) const;
  std::list<WifiMode> GetMcsList (void) const;
  std::list<WifiMode> GetMcsList (WifiModulationClass modulation) const;
  WifiMode GetMcs (WifiModulationClass modulation, uint8_t mcs) const;
 
  virtual void SetChannelNumber (uint8_t id);
  uint8_t GetChannelNumber (void) const;
  Time GetChannelSwitchDelay (void) const;
 
  virtual void ConfigureStandardAndBand (WifiPhyStandard standard, WifiPhyBand band);
 
  WifiPhyStandard GetPhyStandard (void) const;
 
  WifiPhyBand GetPhyBand (void) const;
 
  const WifiPhyOperatingChannel& GetOperatingChannel (void) const;
 
  virtual Ptr<Channel> GetChannel (void) const = 0;
 
  void NotifyTxBegin (WifiConstPsduMap psdus, double txPowerW);
  void NotifyTxEnd (WifiConstPsduMap psdus);
  void NotifyTxDrop (Ptr<const WifiPsdu> psdu);
  void NotifyRxBegin (Ptr<const WifiPsdu> psdu, RxPowerWattPerChannelBand rxPowersW);
  void NotifyRxEnd (Ptr<const WifiPsdu> psdu);
  void NotifyRxDrop (Ptr<const WifiPsdu> psdu, WifiPhyRxfailureReason reason);
 
  void NotifyMonitorSniffRx (Ptr<const WifiPsdu> psdu,
                             uint16_t channelFreqMhz,
                             WifiTxVector txVector,
                             SignalNoiseDbm signalNoise,
                             std::vector<bool> statusPerMpdu,
                             uint16_t staId = SU_STA_ID);
 
  typedef void (* MonitorSnifferRxCallback)(Ptr<const Packet> packet,
                                            uint16_t channelFreqMhz,
                                            WifiTxVector txVector,
                                            MpduInfo aMpdu,
                                            SignalNoiseDbm signalNoise,
                                            uint16_t staId);
 
  void NotifyMonitorSniffTx (Ptr<const WifiPsdu> psdu,
                             uint16_t channelFreqMhz,
                             WifiTxVector txVector,
                             uint16_t staId = SU_STA_ID);
 
  typedef void (* MonitorSnifferTxCallback)(const Ptr<const Packet> packet,
                                            uint16_t channelFreqMhz,
                                            WifiTxVector txVector,
                                            MpduInfo aMpdu,
                                            uint16_t staId);
 
  typedef void (* PsduTxBeginCallback)(WifiConstPsduMap psduMap, WifiTxVector txVector, double txPowerW);
 
  typedef void (* PhyRxPayloadBeginTracedCallback)(WifiTxVector txVector, Time psduDuration);
 
  virtual int64_t AssignStreams (int64_t stream);
 
  void SetRxSensitivity (double threshold);
  double GetRxSensitivity (void) const;
  void SetCcaEdThreshold (double threshold);
  double GetCcaEdThreshold (void) const;
  void SetRxNoiseFigure (double noiseFigureDb);
  void SetTxPowerStart (double start);
  double GetTxPowerStart (void) const;
  void SetTxPowerEnd (double end);
  double GetTxPowerEnd (void) const;
  void SetNTxPower (uint8_t n);
  uint8_t GetNTxPower (void) const;
  void SetTxGain (double gain);
  double GetTxGain (void) const;
  void SetRxGain (double gain);
  double GetRxGain (void) const;
 
  void SetDevice (const Ptr<NetDevice> device);
  Ptr<NetDevice> GetDevice (void) const;
  void SetMobility (const Ptr<MobilityModel> mobility);
  Ptr<MobilityModel> GetMobility (void) const;
 
  void SetOperatingChannel (uint8_t number, uint16_t frequency, uint16_t width);
  virtual void SetFrequency (uint16_t freq);
  uint16_t GetFrequency (void) const;
  void SetPrimary20Index (uint8_t index);
  void SetNumberOfAntennas (uint8_t antennas);
  uint8_t GetNumberOfAntennas (void) const;
  void SetMaxSupportedTxSpatialStreams (uint8_t streams);
  uint8_t GetMaxSupportedTxSpatialStreams (void) const;
  void SetMaxSupportedRxSpatialStreams (uint8_t streams);
  uint8_t GetMaxSupportedRxSpatialStreams (void) const;
  void SetShortPhyPreambleSupported (bool preamble);
  bool GetShortPhyPreambleSupported (void) const;
 
  void SetErrorRateModel (const Ptr<ErrorRateModel> rate);
  void SetPostReceptionErrorModel (const Ptr<ErrorModel> em);
  void SetFrameCaptureModel (const Ptr<FrameCaptureModel> frameCaptureModel);
  void SetPreambleDetectionModel (const Ptr<PreambleDetectionModel> preambleDetectionModel);
  void SetWifiRadioEnergyModel (const Ptr<WifiRadioEnergyModel> wifiRadioEnergyModel);
 
  uint16_t GetChannelWidth (void) const;
  virtual void SetChannelWidth (uint16_t channelWidth);
  void AddSupportedChannelWidth (uint16_t width);
  std::vector<uint16_t> GetSupportedChannelWidthSet (void) const;
 
  double GetPowerDbm (uint8_t power) const;
 
  void ResetCca (bool powerRestricted, double txPowerMaxSiso = 0, double txPowerMaxMimo = 0);
  double GetTxPowerForTransmission (Ptr<const WifiPpdu> ppdu) const;
  void NotifyChannelAccessRequested (void);
 
 
  virtual WifiSpectrumBand ConvertHeRuSubcarriers (uint16_t bandWidth, uint16_t guardBandwidth,
                                                   HeRu::SubcarrierRange range, uint8_t bandIndex = 0) const;
 
  static void AddStaticPhyEntity (WifiModulationClass modulation, Ptr<PhyEntity> phyEntity);
 
  static const Ptr<const PhyEntity> GetStaticPhyEntity (WifiModulationClass modulation);
 
  Ptr<PhyEntity> GetPhyEntity (WifiModulationClass modulation) const;
 
  uint64_t GetPreviouslyRxPpduUid (void) const;
 
  virtual uint16_t GetGuardBandwidth (uint16_t currentChannelWidth) const = 0;
  virtual std::tuple<double, double, double> GetTxMaskRejectionParams (void) const = 0;
 
protected:
  virtual void DoDispose (void);
 
  void Reset (void);
 
  Time DoChannelSwitch (void);
 
  void SwitchMaybeToCcaBusy (uint16_t channelWidth);
 
  uint16_t GetMeasurementChannelWidth (const Ptr<const WifiPpdu> ppdu) const;
 
  virtual WifiSpectrumBand GetBand (uint16_t bandWidth, uint8_t bandIndex = 0);
 
  WifiSpectrumBand GetPrimaryBand (uint16_t bandWidth);
 
  void AddPhyEntity (WifiModulationClass modulation, Ptr<PhyEntity> phyEntity);
 
  InterferenceHelper m_interference;   
  Ptr<UniformRandomVariable> m_random; 
  Ptr<WifiPhyStateHelper> m_state;     
 
  uint32_t m_txMpduReferenceNumber;    
  uint32_t m_rxMpduReferenceNumber;    
 
  EventId m_endPhyRxEvent;             
  EventId m_endTxEvent;                
 
  Ptr<Event> m_currentEvent; 
  std::map <std::pair<uint64_t /* UID*/, WifiPreamble>, Ptr<Event> > m_currentPreambleEvents; 
 
  uint64_t m_previouslyRxPpduUid;  
 
  std::map<WifiModulationClass, Ptr<PhyEntity> > m_phyEntities;
 
 
private:
  void Configure80211a (void);
  void Configure80211b (void);
  void Configure80211g (void);
  void Configure80211p (void);
  void Configure80211n (void);
  void Configure80211ac (void);
  void Configure80211ax (void);
  void ConfigureHtDeviceMcsSet (void);
  void PushMcs (WifiMode mode);
  void RebuildMcsMap (void);
 
  void AbortCurrentReception (WifiPhyRxfailureReason reason);
 
  void MaybeCcaBusyDuration (uint16_t channelWidth);
 
  Ptr<const WifiPsdu> GetAddressedPsduInPpdu (Ptr<const WifiPpdu> ppdu) const;
 
  TracedCallback<Ptr<const Packet>, double > m_phyTxBeginTrace;
  TracedCallback<WifiConstPsduMap, WifiTxVector, double /* TX power (W) */> m_phyTxPsduBeginTrace;
 
  TracedCallback<Ptr<const Packet> > m_phyTxEndTrace;
 
  TracedCallback<Ptr<const Packet> > m_phyTxDropTrace;
 
  TracedCallback<Ptr<const Packet>, RxPowerWattPerChannelBand > m_phyRxBeginTrace;
 
  TracedCallback<WifiTxVector, Time> m_phyRxPayloadBeginTrace;
 
  TracedCallback<Ptr<const Packet> > m_phyRxEndTrace;
 
  TracedCallback<Ptr<const Packet>, WifiPhyRxfailureReason > m_phyRxDropTrace;
 
  TracedCallback<Ptr<const Packet>, uint16_t /* frequency (MHz) */, WifiTxVector, MpduInfo, SignalNoiseDbm, uint16_t /* STA-ID*/> m_phyMonitorSniffRxTrace;
 
  TracedCallback<Ptr<const Packet>, uint16_t /* frequency (MHz) */, WifiTxVector, MpduInfo, uint16_t /* STA-ID*/> m_phyMonitorSniffTxTrace;
 
  static std::map<WifiModulationClass, Ptr<PhyEntity> > m_staticPhyEntities;
 
  WifiPhyStandard m_standard;               
  WifiPhyBand m_band;                       
  uint16_t m_initialFrequency;              
  uint8_t m_initialChannelNumber;           
  uint16_t m_initialChannelWidth;           
  uint8_t m_initialPrimary20Index;          
 
  WifiPhyOperatingChannel m_operatingChannel;       
  std::vector<uint16_t> m_supportedChannelWidthSet; 
 
  Time m_sifs;                              
  Time m_slot;                              
  Time m_pifs;                              
  Time m_ackTxTime;                         
  Time m_blockAckTxTime;                    
 
  double   m_rxSensitivityW;      
  double   m_ccaEdThresholdW;     
  double   m_txGainDb;            
  double   m_rxGainDb;            
  double   m_txPowerBaseDbm;      
  double   m_txPowerEndDbm;       
  uint8_t  m_nTxPower;            
  double m_powerDensityLimit;     
 
  bool m_powerRestricted;        
  double m_txPowerMaxSiso;       
  double m_txPowerMaxMimo;       
  bool m_channelAccessRequested; 
 
  bool m_shortPreamble;        
  uint8_t m_numberOfAntennas;  
  uint8_t m_txSpatialStreams;  
  uint8_t m_rxSpatialStreams;  
 
  Time m_channelSwitchDelay;     
 
  Ptr<NetDevice>     m_device;   
  Ptr<MobilityModel> m_mobility; 
 
  Ptr<FrameCaptureModel> m_frameCaptureModel;           
  Ptr<PreambleDetectionModel> m_preambleDetectionModel; 
  Ptr<WifiRadioEnergyModel> m_wifiRadioEnergyModel;     
  Ptr<ErrorModel> m_postReceptionErrorModel;            
  Time m_timeLastPreambleDetected;                      
 
  Callback<void> m_capabilitiesChangedCallback; 
};
 
std::ostream& operator<< (std::ostream& os, RxSignalInfo rxSignalInfo);
 
} //namespace ns3
 
#endif /* WIFI_PHY_H */