ofdm-phy.h

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/*
 * Copyright (c) 2020 Orange Labs
 *
 * 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: Rediet <getachew.redieteab@orange.com>
 *          Sébastien Deronne <sebastien.deronne@gmail.com> (for logic ported from wifi-phy)
 *          Mathieu Lacage <mathieu.lacage@sophia.inria.fr> (for logic ported from wifi-phy)
 */
 
#ifndef OFDM_PHY_H
#define OFDM_PHY_H
 
#include "ns3/phy-entity.h"
 
namespace ns3
{
 
enum OfdmPhyVariant
{
    OFDM_PHY_DEFAULT,
    OFDM_PHY_10_MHZ,
    OFDM_PHY_5_MHZ
};
 
class OfdmPhy : public PhyEntity
{
  public:
    OfdmPhy(OfdmPhyVariant variant = OFDM_PHY_DEFAULT, bool buildModeList = true);
    ~OfdmPhy() override;
 
    WifiMode GetSigMode(WifiPpduField field, const WifiTxVector& txVector) const override;
    const PpduFormats& GetPpduFormats() const override;
    Time GetDuration(WifiPpduField field, const WifiTxVector& txVector) const override;
    Time GetPayloadDuration(uint32_t size,
                            const WifiTxVector& txVector,
                            WifiPhyBand band,
                            MpduType mpdutype,
                            bool incFlag,
                            uint32_t& totalAmpduSize,
                            double& totalAmpduNumSymbols,
                            uint16_t staId) const override;
    Ptr<WifiPpdu> BuildPpdu(const WifiConstPsduMap& psdus,
                            const WifiTxVector& txVector,
                            Time ppduDuration) override;
    double GetCcaThreshold(const Ptr<const WifiPpdu> ppdu,
                           WifiChannelListType channelType) const override;
 
    static void InitializeModes();
    static WifiMode GetOfdmRate(uint64_t rate, uint16_t bw = 20);
    static WifiMode GetOfdmRate6Mbps();
    static WifiMode GetOfdmRate9Mbps();
    static WifiMode GetOfdmRate12Mbps();
    static WifiMode GetOfdmRate18Mbps();
    static WifiMode GetOfdmRate24Mbps();
    static WifiMode GetOfdmRate36Mbps();
    static WifiMode GetOfdmRate48Mbps();
    static WifiMode GetOfdmRate54Mbps();
    static WifiMode GetOfdmRate3MbpsBW10MHz();
    static WifiMode GetOfdmRate4_5MbpsBW10MHz();
    static WifiMode GetOfdmRate6MbpsBW10MHz();
    static WifiMode GetOfdmRate9MbpsBW10MHz();
    static WifiMode GetOfdmRate12MbpsBW10MHz();
    static WifiMode GetOfdmRate18MbpsBW10MHz();
    static WifiMode GetOfdmRate24MbpsBW10MHz();
    static WifiMode GetOfdmRate27MbpsBW10MHz();
    static WifiMode GetOfdmRate1_5MbpsBW5MHz();
    static WifiMode GetOfdmRate2_25MbpsBW5MHz();
    static WifiMode GetOfdmRate3MbpsBW5MHz();
    static WifiMode GetOfdmRate4_5MbpsBW5MHz();
    static WifiMode GetOfdmRate6MbpsBW5MHz();
    static WifiMode GetOfdmRate9MbpsBW5MHz();
    static WifiMode GetOfdmRate12MbpsBW5MHz();
    static WifiMode GetOfdmRate13_5MbpsBW5MHz();
 
    static WifiCodeRate GetCodeRate(const std::string& name);
    static uint16_t GetConstellationSize(const std::string& name);
    static uint64_t GetPhyRate(const std::string& name, uint16_t channelWidth);
 
    static uint64_t GetPhyRateFromTxVector(const WifiTxVector& txVector, uint16_t staId);
    static uint64_t GetDataRateFromTxVector(const WifiTxVector& txVector, uint16_t staId);
    static uint64_t GetDataRate(const std::string& name, uint16_t channelWidth);
    static bool IsAllowed(const WifiTxVector& txVector);
 
  protected:
    PhyFieldRxStatus DoEndReceiveField(WifiPpduField field, Ptr<Event> event) override;
    Ptr<SpectrumValue> GetTxPowerSpectralDensity(double txPowerW,
                                                 Ptr<const WifiPpdu> ppdu) const override;
    uint32_t GetMaxPsduSize() const override;
    uint16_t GetMeasurementChannelWidth(const Ptr<const WifiPpdu> ppdu) const override;
 
    virtual WifiMode GetHeaderMode(const WifiTxVector& txVector) const;
 
    virtual Time GetPreambleDuration(const WifiTxVector& txVector) const;
    virtual Time GetHeaderDuration(const WifiTxVector& txVector) const;
 
    uint8_t GetNumberServiceBits() const;
    Time GetSignalExtension(WifiPhyBand band) const;
 
    PhyFieldRxStatus EndReceiveHeader(Ptr<Event> event);
 
    virtual bool IsChannelWidthSupported(Ptr<const WifiPpdu> ppdu) const;
    virtual bool IsAllConfigSupported(WifiPpduField field, Ptr<const WifiPpdu> ppdu) const;
 
    static uint64_t CalculatePhyRate(WifiCodeRate codeRate, uint64_t dataRate);
    static double GetCodeRatio(WifiCodeRate codeRate);
    static uint64_t CalculateDataRate(WifiCodeRate codeRate,
                                      uint16_t constellationSize,
                                      uint16_t channelWidth);
    static uint64_t CalculateDataRate(Time symbolDuration,
                                      uint16_t usableSubCarriers,
                                      uint16_t numberOfBitsPerSubcarrier,
                                      double codingRate);
 
    static uint16_t GetUsableSubcarriers();
 
    static Time GetSymbolDuration(uint16_t channelWidth);
 
  private:
    static WifiMode CreateOfdmMode(std::string uniqueName, bool isMandatory);
 
    static const PpduFormats m_ofdmPpduFormats; 
 
    static const ModulationLookupTable
        m_ofdmModulationLookupTable; 
};                                   // class OfdmPhy
 
} // namespace ns3
 
#endif /* OFDM_PHY_H */