wifi-phy.h

Go to the documentation of this file.

/*
 * 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 "phy-entity.h"
#include "wifi-phy-operating-channel.h"
#include "wifi-phy-state-helper.h"
#include "wifi-standards.h"
 
#include "ns3/error-model.h"
 
#include <limits>
 
namespace ns3
{
 
class Channel;
class WifiNetDevice;
class MobilityModel;
class WifiPhyStateHelper;
class FrameCaptureModel;
class PreambleDetectionModel;
class WifiRadioEnergyModel;
class UniformRandomVariable;
class InterferenceHelper;
class ErrorRateModel;
 
class WifiPhy : public Object
{
  public:
    friend class PhyEntity;
    static TypeId GetTypeId();
 
    WifiPhy();
    ~WifiPhy() override;
 
    Ptr<WifiPhyStateHelper> GetState() 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<const WifiPpdu> ppdu,
                              RxPowerWattPerChannelBand& rxPowersW,
                              Time rxDuration);
 
    void EndReceiveInterBss();
 
    static WifiConstPsduMap GetWifiConstPsduMap(Ptr<const WifiPsdu> psdu,
                                                const WifiTxVector& txVector);
 
    void Send(Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
    void Send(WifiConstPsduMap psdus, const WifiTxVector& txVector);
 
    virtual void StartTx(Ptr<const WifiPpdu> ppdu) = 0;
 
    void SetSleepMode();
    void ResumeFromSleep();
    void SetOffMode();
    void ResumeFromOff();
 
    bool IsStateIdle() const;
    bool IsStateCcaBusy() const;
    bool IsStateRx() const;
    bool IsStateTx() const;
    bool IsStateSwitching() const;
    bool IsStateSleep() const;
    bool IsStateOff() const;
 
    Time GetDelayUntilIdle();
 
    Time GetLastRxStartTime() const;
    Time GetLastRxEndTime() 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();
    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() const;
    std::list<WifiMode> GetModeList(WifiModulationClass modulation) const;
    bool IsModeSupported(WifiMode mode) const;
    WifiMode GetDefaultMode() const;
    bool IsMcsSupported(WifiModulationClass modulation, uint8_t mcs) const;
 
    double CalculateSnr(const WifiTxVector& txVector, double ber) const;
 
    void SetSifs(Time sifs);
    Time GetSifs() const;
    void SetSlot(Time slot);
    Time GetSlot() const;
    void SetPifs(Time pifs);
    Time GetPifs() const;
    Time GetAckTxTime() const;
    Time GetBlockAckTxTime() const;
 
    static uint32_t GetMaxPsduSize(WifiModulationClass modulation);
 
    std::list<uint8_t> GetBssMembershipSelectorList() const;
    uint16_t GetNMcs() const;
    std::list<WifiMode> GetMcsList() const;
    std::list<WifiMode> GetMcsList(WifiModulationClass modulation) const;
    WifiMode GetMcs(WifiModulationClass modulation, uint8_t mcs) const;
 
    uint8_t GetChannelNumber() const;
    Time GetChannelSwitchDelay() const;
 
    virtual void ConfigureStandard(WifiStandard standard);
 
    WifiStandard GetStandard() const;
 
    WifiPhyBand GetPhyBand() const;
 
    const WifiPhyOperatingChannel& GetOperatingChannel() const;
 
    virtual Ptr<Channel> GetChannel() const = 0;
 
    void NotifyTxBegin(WifiConstPsduMap psdus, double txPowerW);
    void NotifyTxEnd(WifiConstPsduMap psdus);
    void NotifyTxDrop(Ptr<const WifiPsdu> psdu);
    void NotifyRxBegin(Ptr<const WifiPsdu> psdu, const 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 (*PhyTxBeginTracedCallback)(Ptr<const Packet> packet, double txPowerW);
 
    typedef void (*PsduTxBeginCallback)(WifiConstPsduMap psduMap,
                                        WifiTxVector txVector,
                                        double txPowerW);
 
    typedef void (*PhyRxBeginTracedCallback)(Ptr<const Packet> packet,
                                             RxPowerWattPerChannelBand rxPowersW);
 
    typedef void (*PhyRxPayloadBeginTracedCallback)(WifiTxVector txVector, Time psduDuration);
 
    virtual int64_t AssignStreams(int64_t stream);
 
    void SetRxSensitivity(double threshold);
    double GetRxSensitivity() const;
    void SetCcaEdThreshold(double threshold);
    double GetCcaEdThreshold() const;
    void SetCcaSensitivityThreshold(double threshold);
    double GetCcaSensitivityThreshold() const;
    void SetRxNoiseFigure(double noiseFigureDb);
    void SetTxPowerStart(double start);
    double GetTxPowerStart() const;
    void SetTxPowerEnd(double end);
    double GetTxPowerEnd() const;
    void SetNTxPower(uint8_t n);
    uint8_t GetNTxPower() const;
    void SetTxGain(double gain);
    double GetTxGain() const;
    void SetRxGain(double gain);
    double GetRxGain() const;
 
    virtual void SetDevice(const Ptr<WifiNetDevice> device);
    Ptr<WifiNetDevice> GetDevice() const;
    void SetMobility(const Ptr<MobilityModel> mobility);
    Ptr<MobilityModel> GetMobility() const;
 
    using ChannelTuple =
        std::tuple<uint8_t /* channel number */,
                   uint16_t /* channel width */,
                   int /* WifiPhyBand */,
                   uint8_t /* primary20 index*/>; 
 
    void SetOperatingChannel(const ChannelTuple& channelTuple);
    void SetOperatingChannel(const WifiPhyOperatingChannel& channel);
    void SetFixedPhyBand(bool enable);
    bool HasFixedPhyBand() const;
    uint16_t GetFrequency() const;
    uint8_t GetPrimary20Index() const;
    uint16_t GetTxBandwidth(
        WifiMode mode,
        uint16_t maxAllowedBandWidth = std::numeric_limits<uint16_t>::max()) const;
    void SetNumberOfAntennas(uint8_t antennas);
    uint8_t GetNumberOfAntennas() const;
    void SetMaxSupportedTxSpatialStreams(uint8_t streams);
    uint8_t GetMaxSupportedTxSpatialStreams() const;
    void SetMaxSupportedRxSpatialStreams(uint8_t streams);
    uint8_t GetMaxSupportedRxSpatialStreams() const;
    void SetShortPhyPreambleSupported(bool preamble);
    bool GetShortPhyPreambleSupported() const;
 
    virtual void SetInterferenceHelper(const Ptr<InterferenceHelper> helper);
 
    void SetErrorRateModel(const Ptr<ErrorRateModel> model);
    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() 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();
 
    virtual WifiSpectrumBandFrequencies ConvertIndicesToFrequencies(
        const WifiSpectrumBandIndices& indices) const = 0;
 
    static void AddStaticPhyEntity(WifiModulationClass modulation, Ptr<PhyEntity> phyEntity);
 
    static const Ptr<const PhyEntity> GetStaticPhyEntity(WifiModulationClass modulation);
 
    Ptr<PhyEntity> GetPhyEntityForPpdu(const Ptr<const WifiPpdu> ppdu) const;
 
    Ptr<PhyEntity> GetPhyEntity(WifiModulationClass modulation) const;
    Ptr<PhyEntity> GetPhyEntity(WifiStandard standard) const;
    Ptr<PhyEntity> GetLatestPhyEntity() const;
 
    uint64_t GetPreviouslyRxPpduUid() const;
 
    void SetPreviouslyRxPpduUid(uint64_t uid);
 
    virtual uint16_t GetGuardBandwidth(uint16_t currentChannelWidth) const = 0;
    virtual std::tuple<double, double, double> GetTxMaskRejectionParams() const = 0;
 
    uint8_t GetPrimaryChannelNumber(uint16_t primaryChannelWidth) const;
 
    virtual WifiSpectrumBandInfo GetBand(uint16_t bandWidth, uint8_t bandIndex = 0) = 0;
 
    virtual FrequencyRange GetCurrentFrequencyRange() const = 0;
 
    uint32_t GetSubcarrierSpacing() const;
 
  protected:
    void DoInitialize() override;
    void DoDispose() override;
 
    void Reset();
 
    Time GetDelayUntilChannelSwitch();
    virtual void DoChannelSwitch();
 
    void SwitchMaybeToCcaBusy(const Ptr<const WifiPpdu> ppdu);
    void NotifyCcaBusy(const Ptr<const WifiPpdu> ppdu, Time duration);
 
    void AddPhyEntity(WifiModulationClass modulation, Ptr<PhyEntity> phyEntity);
 
    Ptr<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 Configure80211b();
    void Configure80211g();
    void Configure80211p();
    void Configure80211n();
    void Configure80211ac();
    void Configure80211ax();
    void Configure80211be();
    void ConfigureHtDeviceMcsSet();
    void PushMcs(WifiMode mode);
    void RebuildMcsMap();
 
    void AbortCurrentReception(WifiPhyRxfailureReason reason);
 
    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>>& GetStaticPhyEntities();
 
    WifiStandard m_standard;        
    WifiPhyBand m_band;             
    ChannelTuple m_channelSettings; 
    WifiPhyOperatingChannel m_operatingChannel; 
    bool m_fixedPhyBand; 
 
    Time m_sifs;           
    Time m_slot;           
    Time m_pifs;           
    Time m_ackTxTime;      
    Time m_blockAckTxTime; 
 
    double m_rxSensitivityW;  
    double m_ccaEdThresholdW; 
    double m_ccaSensitivityThresholdW; 
 
    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; 
 
    double m_noiseFigureDb; 
 
    Time m_channelSwitchDelay; 
 
    Ptr<WifiNetDevice> 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 */