ht-frame-exchange-manager.h

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/*
 * Copyright (c) 2020 Universita' degli Studi di Napoli Federico II
 *
 * 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: Stefano Avallone <stavallo@unina.it>
 */
 
#ifndef HT_FRAME_EXCHANGE_MANAGER_H
#define HT_FRAME_EXCHANGE_MANAGER_H
 
#include "ns3/mpdu-aggregator.h"
#include "ns3/msdu-aggregator.h"
#include "ns3/qos-frame-exchange-manager.h"
#include "ns3/wifi-psdu.h"
 
class AmpduAggregationTest;
class TwoLevelAggregationTest;
class HeAggregationTest;
 
namespace ns3
{
 
class MgtAddBaResponseHeader;
class RecipientBlockAckAgreement;
 
class HtFrameExchangeManager : public QosFrameExchangeManager
{
  public:
    friend class ::AmpduAggregationTest;
    friend class ::TwoLevelAggregationTest;
    friend class ::HeAggregationTest;
 
    static TypeId GetTypeId();
    HtFrameExchangeManager();
    ~HtFrameExchangeManager() override;
 
    bool StartFrameExchange(Ptr<QosTxop> edca, Time availableTime, bool initialFrame) override;
    void SetWifiMac(const Ptr<WifiMac> mac) override;
    void CalculateAcknowledgmentTime(WifiAcknowledgment* acknowledgment) const override;
 
    Ptr<MsduAggregator> GetMsduAggregator() const;
    Ptr<MpduAggregator> GetMpduAggregator() const;
 
    bool IsWithinLimitsIfAddMpdu(Ptr<const WifiMpdu> mpdu,
                                 const WifiTxParameters& txParams,
                                 Time ppduDurationLimit) const override;
 
    virtual bool IsWithinAmpduSizeLimit(uint32_t ampduSize,
                                        Mac48Address receiver,
                                        uint8_t tid,
                                        WifiModulationClass modulation) const;
 
    virtual bool TryAggregateMsdu(Ptr<const WifiMpdu> msdu,
                                  WifiTxParameters& txParams,
                                  Time availableTime) const;
 
    virtual bool IsWithinLimitsIfAggregateMsdu(Ptr<const WifiMpdu> msdu,
                                               const WifiTxParameters& txParams,
                                               Time ppduDurationLimit) const;
 
    void CreateBlockAckAgreement(const MgtAddBaResponseHeader* respHdr,
                                 Mac48Address originator,
                                 uint16_t startingSeq);
    void DestroyBlockAckAgreement(Mac48Address originator, uint8_t tid);
    void SendAddBaResponse(const MgtAddBaRequestHeader* reqHdr, Mac48Address originator);
    virtual uint16_t GetSupportedBaBufferSize() const;
 
    bool GetBaAgreementEstablished(Mac48Address originator, uint8_t tid) const;
 
    BlockAckType GetBlockAckType(Mac48Address originator, uint8_t tid) const;
 
    void SendDelbaFrame(Mac48Address addr, uint8_t tid, bool byOriginator);
 
  protected:
    void DoDispose() override;
 
    void ReceiveMpdu(Ptr<const WifiMpdu> mpdu,
                     RxSignalInfo rxSignalInfo,
                     const WifiTxVector& txVector,
                     bool inAmpdu) override;
    void EndReceiveAmpdu(Ptr<const WifiPsdu> psdu,
                         const RxSignalInfo& rxSignalInfo,
                         const WifiTxVector& txVector,
                         const std::vector<bool>& perMpduStatus) override;
    void NotifyReceivedNormalAck(Ptr<WifiMpdu> mpdu) override;
    void NotifyPacketDiscarded(Ptr<const WifiMpdu> mpdu) override;
    void RetransmitMpduAfterMissedAck(Ptr<WifiMpdu> mpdu) const override;
    void ReleaseSequenceNumber(Ptr<WifiMpdu> mpdu) const override;
    void ForwardMpduDown(Ptr<WifiMpdu> mpdu, WifiTxVector& txVector) override;
    void CtsTimeout(Ptr<WifiMpdu> rts, const WifiTxVector& txVector) override;
    void TransmissionSucceeded() override;
 
    virtual Ptr<WifiPsdu> GetWifiPsdu(Ptr<WifiMpdu> mpdu, const WifiTxVector& txVector) const;
 
    Ptr<BlockAckManager> GetBaManager(uint8_t tid) const;
 
    virtual Time GetPsduDurationId(Time txDuration, const WifiTxParameters& txParams) const;
 
    void SendPsduWithProtection(Ptr<WifiPsdu> psdu, WifiTxParameters& txParams);
 
    virtual void NotifyTxToEdca(Ptr<const WifiPsdu> psdu) const;
 
    virtual void ForwardPsduDown(Ptr<const WifiPsdu> psdu, WifiTxVector& txVector);
 
    void DequeuePsdu(Ptr<const WifiPsdu> psdu);
 
    virtual bool SendMpduFromBaManager(Ptr<QosTxop> edca, Time availableTime, bool initialFrame);
 
    virtual bool SendDataFrame(Ptr<WifiMpdu> peekedItem, Time availableTime, bool initialFrame);
 
    virtual bool NeedSetupBlockAck(Mac48Address recipient, uint8_t tid);
 
    void SendAddBaRequest(Mac48Address recipient,
                          uint8_t tid,
                          uint16_t startingSeq,
                          uint16_t timeout,
                          bool immediateBAck);
 
    void SendBlockAck(const RecipientBlockAckAgreement& agreement,
                      Time durationId,
                      WifiTxVector& blockAckTxVector,
                      double rxSnr);
 
    virtual void BlockAckTimeout(Ptr<WifiPsdu> psdu, const WifiTxVector& txVector);
 
    virtual void MissedBlockAck(Ptr<WifiPsdu> psdu, const WifiTxVector& txVector, bool& resetCw);
 
    typedef std::pair<Mac48Address, uint8_t> AgreementKey;
 
    using RecipientBlockAckAgreementMap = std::map<AgreementKey, RecipientBlockAckAgreement>;
 
    RecipientBlockAckAgreementMap m_agreements;        
    RecipientBlockAckAgreementMap m_pendingAgreements; 
    Ptr<MsduAggregator> m_msduAggregator;              
    Ptr<MpduAggregator> m_mpduAggregator;              
 
    std::map<AgreementKey, Ptr<WifiMpdu>> m_pendingAddBaResp;
 
  private:
    void SendPsdu();
 
    Ptr<WifiPsdu> m_psdu;        
    WifiTxParameters m_txParams; 
};
 
} // namespace ns3
 
#endif /* HT_FRAME_EXCHANGE_MANAGER_H */