A Discrete-Event Network Simulator
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18  * Author: Stefano Avallone <stavallo@unina.it>
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24 #include "ns3/object.h"
25 #include "qos-txop.h"
26 #include "wifi-tx-vector.h"
27 #include "wifi-psdu.h"
28 #include "regular-wifi-mac.h"
29 #include "mac-rx-middle.h"
30 #include "mac-tx-middle.h"
31 #include "wifi-phy.h"
32 #include "wifi-tx-timer.h"
33 #include "wifi-tx-parameters.h"
35 namespace ns3 {
37 class ChannelAccessManager;
38 class WifiProtectionManager;
39 struct WifiProtection;
40 class WifiAckManager;
41 struct WifiAcknowledgment;
50 {
51 public:
56  static TypeId GetTypeId (void);
58  virtual ~FrameExchangeManager ();
67  virtual bool StartTransmission (Ptr<Txop> dcf);
80  void Receive (Ptr<WifiPsdu> psdu, RxSignalInfo rxSignalInfo,
81  WifiTxVector txVector, std::vector<bool> perMpduStatus);
88  virtual void SetWifiMac (const Ptr<RegularWifiMac> mac);
94  virtual void SetMacTxMiddle (const Ptr<MacTxMiddle> txMiddle);
100  virtual void SetMacRxMiddle (const Ptr<MacRxMiddle> rxMiddle);
106  virtual void SetChannelAccessManager (const Ptr<ChannelAccessManager> channelAccessManager);
112  virtual void SetWifiPhy (const Ptr<WifiPhy> phy);
116  virtual void ResetPhy (void);
122  virtual void SetProtectionManager (Ptr<WifiProtectionManager> protectionManager);
128  virtual void SetAckManager (Ptr<WifiAckManager> ackManager);
134  virtual void SetAddress (Mac48Address address);
140  virtual void SetBssid (Mac48Address bssid);
144  void SetPromisc (void);
151  bool IsPromisc (void) const;
167  virtual void CalculateProtectionTime (WifiProtection* protection) const;
174  Ptr<WifiAckManager> GetAckManager (void) const;
183  virtual void CalculateAcknowledgmentTime (WifiAcknowledgment* acknowledgment) const;
192  void NotifySwitchingStartNow (Time duration);
199  void NotifySleepNow (void);
206  void NotifyOffNow (void);
208 protected:
209  virtual void DoDispose ();
238  virtual void UpdateNav (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
243  virtual void NavResetTimeout (void);
253  virtual void ReceiveMpdu (Ptr<WifiMacQueueItem> mpdu, RxSignalInfo rxSignalInfo,
254  const WifiTxVector& txVector, bool inAmpdu);
265  virtual void EndReceiveAmpdu (Ptr<const WifiPsdu> psdu, double rxSnr,
266  const WifiTxVector& txVector, const std::vector<bool>& perMpduStatus);
277  virtual void ReceivedNormalAck (Ptr<WifiMacQueueItem> mpdu, const WifiTxVector& txVector,
278  const WifiTxVector& ackTxVector, RxSignalInfo rxSignalInfo, double snr);
292  virtual void RetransmitMpduAfterMissedAck (Ptr<WifiMacQueueItem> mpdu) const;
299  virtual void RetransmitMpduAfterMissedCts (Ptr<WifiMacQueueItem> mpdu) const;
317  virtual void PreProcessFrame (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
329  virtual Time GetTxDuration (uint32_t ppduPayloadSize, Mac48Address receiver,
330  const WifiTxParameters& txParams) const;
339  void UpdateTxDuration (Mac48Address receiver, WifiTxParameters& txParams) const;
352  bool m_promisc;
360  virtual void ForwardMpduDown (Ptr<WifiMacQueueItem> mpdu, WifiTxVector& txVector);
367  virtual void DequeueMpdu (Ptr<WifiMacQueueItem> mpdu);
380  virtual Time GetFrameDurationId (const WifiMacHeader& header, uint32_t size,
381  const WifiTxParameters& txParams,
382  Ptr<Packet> fragmentedPacket) const;
393  virtual Time GetRtsDurationId (const WifiTxVector& rtsTxVector, Time txDuration, Time response) const;
400  void SendRts (const WifiTxParameters& txParams);
409  void SendCtsAfterRts (const WifiMacHeader& rtsHdr, WifiMode rtsTxMode, double rtsSnr);
418  void DoSendCtsAfterRts (const WifiMacHeader& rtsHdr, WifiTxVector& ctsTxVector, double rtsSnr);
429  virtual Time GetCtsToSelfDurationId (const WifiTxVector& ctsTxVector, Time txDuration,
430  Time response) const;
437  void SendCtsToSelf (const WifiTxParameters& txParams);
446  void SendNormalAck (const WifiMacHeader& hdr, const WifiTxVector& dataTxVector, double dataSnr);
460  virtual void TransmissionSucceeded (void);
466  virtual void TransmissionFailed (void);
478  virtual void CtsTimeout (void);
480 private:
491  void RxStartIndication (WifiTxVector txVector, Time psduDuration);
496  void SendMpdu (void);
501  virtual void Reset (void);
511 };
513 } //namespace ns3
void NormalAckTimeout(Ptr< WifiMacQueueItem > mpdu)
Called when the Ack timeout expires.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
virtual void ReceivedNormalAck(Ptr< WifiMacQueueItem > mpdu, const WifiTxVector &txVector, const WifiTxVector &ackTxVector, RxSignalInfo rxSignalInfo, double snr)
Perform the actions needed when a Normal Ack is received.
bool m_moreFragments
true if a fragment has to be sent after a SIFS
virtual void DequeueMpdu(Ptr< WifiMacQueueItem > mpdu)
Dequeue the given MPDU from the queue in which it is stored.
void SendCtsToSelf(const WifiTxParameters &txParams)
Send CTS for a CTS-to-self mechanism.
WifiTxTimer m_txTimer
the timer set upon frame transmission
virtual void SetProtectionManager(Ptr< WifiProtectionManager > protectionManager)
Set the Protection Manager to use.
bool IsPromisc(void) const
Check if the device is operating in promiscuous mode.
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
void SendMpduWithProtection(Ptr< WifiMacQueueItem > mpdu, WifiTxParameters &txParams)
Send an MPDU with the given TX parameters (with the specified protection).
virtual void SetAddress(Mac48Address address)
Set the MAC address.
Ptr< WifiProtectionManager > GetProtectionManager(void) const
Get the Protection Manager used by this node.
Ptr< WifiPhy > m_phy
the PHY layer on this station
Ptr< Packet > m_fragmentedPacket
the MSDU being fragmented
void SetPromisc(void)
Enable promiscuous mode.
WifiAcknowledgment is an abstract base struct.
Ptr< WifiMacQueueItem > m_mpdu
the MPDU being transmitted
virtual void PreProcessFrame(Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector)
Perform actions that are possibly needed when receiving any frame, independently of whether the frame...
virtual void ForwardMpduDown(Ptr< WifiMacQueueItem > mpdu, WifiTxVector &txVector)
Forward an MPDU down to the PHY layer.
virtual void CalculateProtectionTime(WifiProtection *protection) const
Calculate the time required to protect a frame according to the given protection method.
bool m_promisc
Flag if the device is operating in promiscuous mode.
virtual void CtsTimeout(void)
Called when the CTS timeout expires.
void NotifySwitchingStartNow(Time duration)
TypeId m_protectionManagerTypeId
TypeId of the protection manager to install.
Ptr< ChannelAccessManager > m_channelAccessManager
the channel access manager
virtual void DoDispose()
Destructor implementation.
virtual void TransmissionFailed(void)
Take necessary actions upon a transmission failure.
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
Definition: wifi-mode.h:68
virtual void CalculateAcknowledgmentTime(WifiAcknowledgment *acknowledgment) const
Calculate the time required to acknowledge a frame according to the given acknowledgment method...
virtual void ResetPhy(void)
Remove WifiPhy associated with this MacLow.
Ptr< WifiAckManager > GetAckManager(void) const
Get the Acknowledgment Manager used by this node.
Ptr< RegularWifiMac > m_mac
the MAC layer on this station
virtual void SetMacRxMiddle(const Ptr< MacRxMiddle > rxMiddle)
Set the MAC RX Middle to use.
Definition: third.py:93
Ptr< WifiMacQueueItem > GetFirstFragmentIfNeeded(Ptr< WifiMacQueueItem > mpdu)
Fragment the given MPDU if needed.
virtual void SetAckManager(Ptr< WifiAckManager > ackManager)
Set the Acknowledgment Manager to use.
TypeId m_acknowledgmentManagerTypeId
TypeId of the acknowledgment manager to install.
RxSignalInfo structure containing info on the received signal.
Definition: phy-entity.h:66
Mac48Address m_bssid
BSSID address (Mac48Address)
virtual Time GetFrameDurationId(const WifiMacHeader &header, uint32_t size, const WifiTxParameters &txParams, Ptr< Packet > fragmentedPacket) const
Compute how to set the Duration/ID field of a frame being transmitted with the given TX parameters...
void Receive(Ptr< WifiPsdu > psdu, RxSignalInfo rxSignalInfo, WifiTxVector txVector, std::vector< bool > perMpduStatus)
This method is intended to be called by the PHY layer every time an MPDU is received and also when th...
virtual void UpdateNav(Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector)
Update the NAV, if needed, based on the Duration/ID of the given psdu.
virtual void SetMacTxMiddle(const Ptr< MacTxMiddle > txMiddle)
Set the MAC TX Middle to use.
void NotifyOffNow(void)
This method is typically invoked by the PhyMacLowListener to notify the MAC layer that the device has...
EventId m_navResetEvent
the event to reset the NAV after an RTS
Definition: third.py:99
virtual void SetChannelAccessManager(const Ptr< ChannelAccessManager > channelAccessManager)
Set the channel access manager to use.
virtual bool StartTransmission(Ptr< Txop > dcf)
Request the FrameExchangeManager to start a frame exchange sequence.
virtual Time GetRtsDurationId(const WifiTxVector &rtsTxVector, Time txDuration, Time response) const
Compute how to set the Duration/ID field of an RTS frame to send to protect a frame transmitted with ...
Ptr< WifiAckManager > m_ackManager
Acknowledgment manager.
virtual void NotifyPacketDiscarded(Ptr< const WifiMacQueueItem > mpdu)
Pass the packet included in the given MPDU to the packet dropped callback.
Mac48Address m_self
the MAC address of this device
WifiProtection is an abstract base struct.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
void SendRts(const WifiTxParameters &txParams)
Send RTS to begin RTS-CTS-Data-Ack transaction.
This class is used to handle the timer that a station starts when transmitting a frame that solicits ...
Definition: wifi-tx-timer.h:37
Definition: first.py:44
an EUI-48 address
Definition: mac48-address.h:43
void SendCtsAfterRts(const WifiMacHeader &rtsHdr, WifiMode rtsTxMode, double rtsSnr)
Send CTS after receiving RTS.
virtual void SetWifiMac(const Ptr< RegularWifiMac > mac)
Set the MAC layer to use.
WifiTxParameters m_txParams
the TX parameters for the current frame
static TypeId GetTypeId(void)
Get the type ID.
void SendNormalAck(const WifiMacHeader &hdr, const WifiTxVector &dataTxVector, double dataSnr)
Send Normal Ack.
FrameExchangeManager is a base class handling the basic frame exchange sequences for non-QoS stations...
virtual Time GetTxDuration(uint32_t ppduPayloadSize, Mac48Address receiver, const WifiTxParameters &txParams) const
Get the updated TX duration of the frame associated with the given TX parameters if the size of the P...
Ptr< WifiProtectionManager > m_protectionManager
Protection manager.
void NotifySleepNow(void)
This method is typically invoked by the PhyMacLowListener to notify the MAC layer that the device has...
An identifier for simulation events.
Definition: event-id.h:53
virtual void Reset(void)
Reset this frame exchange manager.
virtual void SetBssid(Mac48Address bssid)
Set the Basic Service Set Identification.
This class stores the TX parameters (TX vector, protection mechanism, acknowledgment mechanism...
Ptr< Txop > m_dcf
the DCF/EDCAF that gained channel access
virtual Time GetCtsToSelfDurationId(const WifiTxVector &ctsTxVector, Time txDuration, Time response) const
Compute how to set the Duration/ID field of a CTS-to-self frame to send to protect a frame transmitte...
Time m_navEnd
NAV expiration time.
virtual void ReceiveMpdu(Ptr< WifiMacQueueItem > mpdu, RxSignalInfo rxSignalInfo, const WifiTxVector &txVector, bool inAmpdu)
This method handles the reception of an MPDU (possibly included in an A-MPDU)
virtual void RetransmitMpduAfterMissedAck(Ptr< WifiMacQueueItem > mpdu) const
Retransmit an MPDU that was not acknowledged.
virtual void TransmissionSucceeded(void)
Take necessary actions upon a transmission success.
void RxStartIndication(WifiTxVector txVector, Time psduDuration)
void DoSendCtsAfterRts(const WifiMacHeader &rtsHdr, WifiTxVector &ctsTxVector, double rtsSnr)
Send CTS after receiving RTS.
Ptr< WifiMacQueueItem > GetNextFragment(void)
Get the next fragment of the current MSDU.
virtual void NotifyReceivedNormalAck(Ptr< WifiMacQueueItem > mpdu)
Notify other components that an MPDU was acknowledged.
A base class which provides memory management and object aggregation.
Definition: object.h:87
void UpdateTxDuration(Mac48Address receiver, WifiTxParameters &txParams) const
Update the TX duration field of the given TX parameters after that the PSDU addressed to the given re...
Ptr< MacRxMiddle > m_rxMiddle
the MAC RX Middle on this station
virtual void SetWifiPhy(const Ptr< WifiPhy > phy)
Set the PHY layer to use.
virtual void EndReceiveAmpdu(Ptr< const WifiPsdu > psdu, double rxSnr, const WifiTxVector &txVector, const std::vector< bool > &perMpduStatus)
This method is called when the reception of an A-MPDU including multiple MPDUs is completed...
Ptr< MacTxMiddle > m_txMiddle
the MAC TX Middle on this station
a unique identifier for an interface.
Definition: type-id.h:58
void SendMpdu(void)
Send the current MPDU, which can be acknowledged by a Normal Ack.
Implements the IEEE 802.11 MAC header.
virtual void NavResetTimeout(void)
Reset the NAV upon expiration of the NAV reset timer.
virtual void RetransmitMpduAfterMissedCts(Ptr< WifiMacQueueItem > mpdu) const
Retransmit an MPDU that was not sent because a CTS was not received.