eht-ppdu.h

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/*
 * Copyright (c) 2021 DERONNE SOFTWARE ENGINEERING
 *
 * 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: Sébastien Deronne <sebastien.deronne@gmail.com>
 */
 
#ifndef EHT_PPDU_H
#define EHT_PPDU_H
 
#include "ns3/he-ppdu.h"
 
#include <optional>
 
namespace ns3
{
 
class EhtPpdu : public HePpdu
{
  public:
    struct EhtTbPhyHeader
    {
        // U-SIG fields
        uint8_t m_phyVersionId{0}; 
        uint8_t m_bandwidth{0};    
        uint8_t m_bssColor{0};     
        uint8_t m_ppduType{0};     
 
    }; // struct EhtTbPhyHeader
 
    struct EhtMuPhyHeader
    {
        // U-SIG fields
        uint8_t m_phyVersionId{0}; 
        uint8_t m_bandwidth{0};    
        uint8_t m_bssColor{0};     
        uint8_t m_ppduType{0};     
        uint8_t m_ehtSigMcs{0};    
 
        // EHT-SIG fields
        uint8_t m_giLtfSize{0}; 
 
        std::optional<RuAllocation> m_ruAllocationA; 
        std::optional<RuAllocation> m_ruAllocationB; 
 
        HeSigBContentChannels m_contentChannels; 
    };                                           // struct EhtMuPhyHeader
 
    using EhtPhyHeader = std::variant<std::monostate, EhtTbPhyHeader, EhtMuPhyHeader>;
 
    EhtPpdu(const WifiConstPsduMap& psdus,
            const WifiTxVector& txVector,
            const WifiPhyOperatingChannel& channel,
            Time ppduDuration,
            uint64_t uid,
            TxPsdFlag flag);
 
    WifiPpduType GetType() const override;
    Ptr<WifiPpdu> Copy() const override;
 
    static std::pair<std::size_t, std::size_t> GetNumRusPerEhtSigBContentChannel(
        uint16_t channelWidth,
        uint8_t ehtPpduType,
        const std::vector<uint8_t>& ruAllocation,
        bool compression,
        std::size_t numMuMimoUsers);
 
    static HeSigBContentChannels GetEhtSigContentChannels(const WifiTxVector& txVector,
                                                          uint8_t p20Index);
 
    static uint32_t GetEhtSigFieldSize(uint16_t channelWidth,
                                       const std::vector<uint8_t>& ruAllocation,
                                       uint8_t ehtPpduType,
                                       bool compression,
                                       std::size_t numMuMimoUsers);
 
  private:
    bool IsDlMu() const override;
    bool IsUlMu() const override;
    void SetTxVectorFromPhyHeaders(WifiTxVector& txVector) const override;
 
    void SetPhyHeaders(const WifiTxVector& txVector, Time ppduDuration);
 
    void SetEhtPhyHeader(const WifiTxVector& txVector);
 
    EhtPhyHeader m_ehtPhyHeader; 
};                               // class EhtPpdu
 
} // namespace ns3
 
#endif /* EHT_PPDU_H */