A Discrete-Event Network Simulator
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3  * Copyright (c) 2020 Universita' degli Studi di Napoli Federico II
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18  * Author: Stefano Avallone <stavallo@unina.it>
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24 #include "frame-exchange-manager.h"
26 namespace ns3 {
37 {
38 public:
43  static TypeId GetTypeId (void);
45  virtual ~QosFrameExchangeManager ();
47  bool StartTransmission (Ptr<Txop> edca) override;
62  bool TryAddMpdu (Ptr<const WifiMacQueueItem> mpdu, WifiTxParameters& txParams, Time availableTime) const;
74  virtual bool IsWithinLimitsIfAddMpdu (Ptr<const WifiMacQueueItem> mpdu, const WifiTxParameters& txParams,
75  Time ppduDurationLimit) const;
90  virtual bool IsWithinSizeAndTimeLimits (uint32_t ppduPayloadSize, Mac48Address receiver,
91  const WifiTxParameters& txParams, Time ppduDurationLimit) const;
93 protected:
94  void DoDispose () override;
96  void ReceiveMpdu (Ptr<WifiMacQueueItem> mpdu, RxSignalInfo rxSignalInfo,
97  const WifiTxVector& txVector, bool inAmpdu) override;
98  void PreProcessFrame (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector) override;
99  Time GetFrameDurationId (const WifiMacHeader& header, uint32_t size,
100  const WifiTxParameters& txParams,
101  Ptr<Packet> fragmentedPacket) const override;
102  Time GetRtsDurationId (const WifiTxVector& rtsTxVector, Time txDuration,
103  Time response) const override;
104  Time GetCtsToSelfDurationId (const WifiTxVector& ctsTxVector, Time txDuration,
105  Time response) const override;
106  void TransmissionSucceeded (void) override;
107  void TransmissionFailed (void) override;
118  virtual bool StartTransmission (Ptr<QosTxop> edca, Time txopDuration);
133  virtual bool StartFrameExchange (Ptr<QosTxop> edca, Time availableTime, bool initialFrame);
140  void PifsRecovery (void);
148  virtual bool SendCfEndIfNeeded (void);
156  virtual void SetTxopHolder (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
161 private:
167  void CancelPifsRecovery (void);
173 };
175 } //namespace ns3
EventId m_pifsRecoveryEvent
event associated with an attempt of PIFS recovery
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
Time GetRtsDurationId(const WifiTxVector &rtsTxVector, Time txDuration, Time response) const override
Compute how to set the Duration/ID field of an RTS frame to send to protect a frame transmitted with ...
void PifsRecovery(void)
Perform a PIFS recovery as a response to transmission failure within a TXOP.
bool StartTransmission(Ptr< Txop > edca) override
Request the FrameExchangeManager to start a frame exchange sequence.
void DoDispose() override
Destructor implementation.
void TransmissionSucceeded(void) override
Take necessary actions upon a transmission success.
RxSignalInfo structure containing info on the received signal.
Definition: phy-entity.h:66
void PreProcessFrame(Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector) override
Perform actions that are possibly needed when receiving any frame, independently of whether the frame...
QosFrameExchangeManager handles the frame exchange sequences for QoS stations.
virtual bool IsWithinSizeAndTimeLimits(uint32_t ppduPayloadSize, Mac48Address receiver, const WifiTxParameters &txParams, Time ppduDurationLimit) const
Check whether the transmission time of the frame being built (as described by the given TX parameters...
static TypeId GetTypeId(void)
Get the type ID.
Ptr< Txop > m_edcaBackingOff
channel access function that invoked backoff during TXOP
virtual void SetTxopHolder(Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector)
Set the TXOP holder, if needed, based on the received frame.
virtual bool SendCfEndIfNeeded(void)
Send a CF-End frame to indicate the completion of the TXOP, provided that the remaining duration is l...
bool m_initialFrame
true if transmitting the initial frame of a TXOP
void CancelPifsRecovery(void)
Cancel the PIFS recovery event and have the EDCAF attempting PIFS recovery release the channel...
Every class exported by the ns3 library is enclosed in the ns3 namespace.
bool m_pifsRecovery
true if performing a PIFS recovery after failure
an EUI-48 address
Definition: mac48-address.h:43
Mac48Address m_txopHolder
MAC address of the TXOP holder.
Ptr< QosTxop > m_edca
the EDCAF that gained channel access
Time GetFrameDurationId(const WifiMacHeader &header, uint32_t size, const WifiTxParameters &txParams, Ptr< Packet > fragmentedPacket) const override
Compute how to set the Duration/ID field of a frame being transmitted with the given TX parameters...
FrameExchangeManager is a base class handling the basic frame exchange sequences for non-QoS stations...
An identifier for simulation events.
Definition: event-id.h:53
This class stores the TX parameters (TX vector, protection mechanism, acknowledgment mechanism...
void ReceiveMpdu(Ptr< WifiMacQueueItem > mpdu, RxSignalInfo rxSignalInfo, const WifiTxVector &txVector, bool inAmpdu) override
This method handles the reception of an MPDU (possibly included in an A-MPDU)
void TransmissionFailed(void) override
Take necessary actions upon a transmission failure.
bool TryAddMpdu(Ptr< const WifiMacQueueItem > mpdu, WifiTxParameters &txParams, Time availableTime) const
Recompute the protection and acknowledgment methods to use if the given MPDU is added to the frame be...
virtual bool StartFrameExchange(Ptr< QosTxop > edca, Time availableTime, bool initialFrame)
Start a frame exchange (including protection frames and acknowledgment frames as needed) that fits wi...
a unique identifier for an interface.
Definition: type-id.h:58
Time GetCtsToSelfDurationId(const WifiTxVector &ctsTxVector, Time txDuration, Time response) const override
Compute how to set the Duration/ID field of a CTS-to-self frame to send to protect a frame transmitte...
virtual bool IsWithinLimitsIfAddMpdu(Ptr< const WifiMacQueueItem > mpdu, const WifiTxParameters &txParams, Time ppduDurationLimit) const
Check whether the given MPDU can be added to the frame being built (as described by the given TX para...
Implements the IEEE 802.11 MAC header.