HtFrameExchangeManager handles the frame exchange sequences for HT stations. More...

#include "ht-frame-exchange-manager.h"

Inheritance diagram for ns3::HtFrameExchangeManager:

Collaboration diagram for ns3::HtFrameExchangeManager:

Public Member Functions
	HtFrameExchangeManager ()

	~HtFrameExchangeManager () override

void	CalculateAcknowledgmentTime (WifiAcknowledgment *acknowledgment) const override
	Calculate the time required to acknowledge a frame according to the given acknowledgment method.

Ptr< WifiMpdu >	GetBar (AcIndex ac, std::optional< uint8_t > optTid=std::nullopt, std::optional< Mac48Address > optAddress=std::nullopt)
	Get the next BlockAckRequest or MU-BAR Trigger Frame to send, if any.

Ptr< MpduAggregator >	GetMpduAggregator () const
	Returns the aggregator used to construct A-MPDU subframes.

Ptr< MsduAggregator >	GetMsduAggregator () const
	Returns the aggregator used to construct A-MSDU subframes.

virtual bool	IsWithinAmpduSizeLimit (uint32_t ampduSize, Mac48Address receiver, uint8_t tid, WifiModulationClass modulation) const
	Check whether an A-MPDU of the given size meets the constraint on the maximum size for A-MPDUs sent to the given receiver, belonging to the given TID and transmitted using the given modulation class.

bool	IsWithinLimitsIfAddMpdu (Ptr< const WifiMpdu > mpdu, const WifiTxParameters &txParams, Time ppduDurationLimit) const override
	Check if the PSDU obtained by aggregating the given MPDU to the PSDU specified by the given TX parameters meets the constraints on the maximum A-MPDU size and its transmission time does not exceed the given PPDU duration limit (if different than Time::Min()).

virtual bool	IsWithinLimitsIfAggregateMsdu (Ptr< const WifiMpdu > msdu, const WifiTxParameters &txParams, Time ppduDurationLimit) const
	Check if the PSDU obtained by aggregating the given MSDU to the PSDU specified by the given TX parameters meets the constraints on the maximum A-MSDU size and its transmission time does not exceed the given PPDU duration limit (if different than Time::Min()).

void	SendAddBaResponse (const MgtAddBaRequestHeader &reqHdr, Mac48Address originator)
	This method can be called to accept a received ADDBA Request.

void	SendDelbaFrame (Mac48Address addr, uint8_t tid, bool byOriginator)
	Sends DELBA frame to cancel a block ack agreement with STA addressed by addr for TID tid.

void	SetWifiMac (const Ptr< WifiMac > mac) override
	Set the MAC layer to use.

bool	StartFrameExchange (Ptr< QosTxop > edca, Time availableTime, bool initialFrame) override
	Start a frame exchange (including protection frames and acknowledgment frames as needed) that fits within the given availableTime (if different than Time::Min()).

virtual bool	TryAggregateMsdu (Ptr< const WifiMpdu > msdu, WifiTxParameters &txParams, Time availableTime) const
	Check if aggregating an MSDU to the current MPDU (as specified by the given TX parameters) does not violate the size and time constraints, while taking into account the possibly updated protection and acknowledgment methods.

Public Member Functions inherited from ns3::QosFrameExchangeManager
	QosFrameExchangeManager ()

	~QosFrameExchangeManager () override

virtual Ptr< WifiMpdu >	CreateAliasIfNeeded (Ptr< WifiMpdu > mpdu) const
	Create an alias of the given MPDU for transmission by this Frame Exchange Manager.

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) does not exceed the given PPDU duration limit if the size of the PSDU addressed to the given receiver becomes ppduPayloadSize.

bool	StartTransmission (Ptr< Txop > edca, MHz_u allowedWidth) override
	Request the FrameExchangeManager to start a frame exchange sequence.

bool	TryAddMpdu (Ptr< const WifiMpdu > mpdu, WifiTxParameters &txParams, Time availableTime) const
	Recompute the protection and acknowledgment methods to use if the given MPDU is added to the frame being built (as described by the given TX parameters) and check whether the duration of the frame exchange sequence (including protection and acknowledgment) does not exceed the given available time.

Public Member Functions inherited from ns3::FrameExchangeManager
	FrameExchangeManager ()

	~FrameExchangeManager () override

virtual void	CalculateProtectionTime (WifiProtection *protection) const
	Calculate the time required to protect a frame according to the given protection method.

Ptr< WifiAckManager >	GetAckManager () const
	Get the Acknowledgment Manager used by this node.

Mac48Address	GetAddress () const
	Get the MAC address.

MHz_u	GetAllowedWidth () const

Mac48Address	GetBssid () const
	Get the Basic Service Set Identification.

std::optional< std::reference_wrapper< const OngoingRxInfo > >	GetOngoingRxInfo () const

const std::set< Mac48Address > &	GetProtectedStas () const

Ptr< WifiProtectionManager >	GetProtectionManager () const
	Get the Protection Manager used by this node.

std::optional< std::reference_wrapper< const WifiMacHeader > >	GetReceivedMacHdr () const

const WifiTxTimer &	GetWifiTxTimer () const
	Get a const reference to the WifiTxTimer object.

bool	IsPromisc () const
	Check if the device is operating in promiscuous mode.

virtual void	NotifyInternalCollision (Ptr< Txop > txop)
	Notify that an internal collision has occurred for the given Txop.

void	NotifyOffNow ()
	This method is typically invoked by the PhyListener to notify the MAC layer that the device has been put into off mode.

void	NotifySleepNow ()
	This method is typically invoked by the PhyListener to notify the MAC layer that the device has been put into sleep mode.

virtual void	NotifySwitchingStartNow (Time duration)

void	Receive (Ptr< const 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 the reception of an A-MPDU is completed.

virtual void	ResetPhy ()
	Remove WifiPhy associated with this FrameExchangeManager.

void	SetAckedMpduCallback (AckedMpdu callback)
	Set the callback to invoke when an MPDU is successfully acked.

virtual void	SetAckManager (Ptr< WifiAckManager > ackManager)
	Set the Acknowledgment Manager to use.

virtual void	SetAddress (Mac48Address address)
	Set the MAC address.

virtual void	SetBssid (Mac48Address bssid)
	Set the Basic Service Set Identification.

virtual void	SetChannelAccessManager (const Ptr< ChannelAccessManager > channelAccessManager)
	Set the channel access manager to use.

virtual void	SetDroppedMpduCallback (DroppedMpdu callback)
	Set the callback to invoke when an MPDU is dropped.

virtual void	SetLinkId (uint8_t linkId)
	Set the ID of the link this Frame Exchange Manager is associated with.

virtual void	SetMacRxMiddle (const Ptr< MacRxMiddle > rxMiddle)
	Set the MAC RX Middle to use.

virtual void	SetMacTxMiddle (const Ptr< MacTxMiddle > txMiddle)
	Set the MAC TX Middle to use.

void	SetPromisc ()
	Enable promiscuous mode.

virtual void	SetProtectionManager (Ptr< WifiProtectionManager > protectionManager)
	Set the Protection Manager to use.

virtual void	SetWifiPhy (const Ptr< WifiPhy > phy)
	Set the PHY layer to use.

virtual bool	VirtualCsMediumIdle () const

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor.

	~Object () override
	Destructor.

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.

void	Dispose ()
	Dispose of this Object.

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.

TypeId	GetInstanceTypeId () const override
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.

bool	IsInitialized () const
	Check if the object has been initialized.

void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.

void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::QosFrameExchangeManager
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::FrameExchangeManager
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Protected Types
typedef std::pair< Mac48Address, uint8_t >	AgreementKey
	agreement key typedef (MAC address and TID)

Protected Member Functions
virtual void	BlockAckTimeout (Ptr< WifiPsdu > psdu, const WifiTxVector &txVector)
	Called when the BlockAck timeout expires.

void	CtsTimeout (Ptr< WifiMpdu > rts, const WifiTxVector &txVector) override
	Called when the CTS timeout expires.

void	DequeuePsdu (Ptr< const WifiPsdu > psdu)
	Dequeue the MPDUs of the given PSDU from the queue in which they are stored.

void	DoDispose () override
	Destructor implementation.

void	EndReceiveAmpdu (Ptr< const WifiPsdu > psdu, const RxSignalInfo &rxSignalInfo, const WifiTxVector &txVector, const std::vector< bool > &perMpduStatus) override
	This method is called when the reception of an A-MPDU including multiple MPDUs is completed.

void	FinalizeMacHeader (Ptr< const WifiPsdu > psdu) override
	Finalize the MAC header of the MPDUs in the given PSDU before transmission.

void	ForwardMpduDown (Ptr< WifiMpdu > mpdu, WifiTxVector &txVector) override
	Forward an MPDU down to the PHY layer.

virtual void	ForwardPsduDown (Ptr< const WifiPsdu > psdu, WifiTxVector &txVector)
	Forward a PSDU down to the PHY layer.

Ptr< BlockAckManager >	GetBaManager (uint8_t tid) const
	Get the Block Ack Manager handling the given TID.

virtual Time	GetPsduDurationId (Time txDuration, const WifiTxParameters &txParams) const
	Compute how to set the Duration/ID field of PSDUs that do not include fragments.

virtual Ptr< WifiPsdu >	GetWifiPsdu (Ptr< WifiMpdu > mpdu, const WifiTxVector &txVector) const
	Get a PSDU containing the given MPDU.

virtual void	MissedBlockAck (Ptr< WifiPsdu > psdu, const WifiTxVector &txVector, bool &resetCw)
	Take necessary actions when a BlockAck is missed, such as scheduling a BlockAckReq frame or the retransmission of the unacknowledged frames.

virtual bool	NeedSetupBlockAck (Mac48Address recipient, uint8_t tid)
	A Block Ack agreement needs to be established with the given recipient for the given TID if it does not already exist (or exists and is in state RESET) and:

void	NotifyPacketDiscarded (Ptr< const WifiMpdu > mpdu) override
	Pass the given MPDU, discarded because of the max retry limit was reached, to the MPDU dropped callback.

void	NotifyReceivedNormalAck (Ptr< WifiMpdu > mpdu) override
	Notify other components that an MPDU was acknowledged.

virtual void	NotifyTxToEdca (Ptr< const WifiPsdu > psdu) const
	Notify the transmission of the given PSDU to the EDCAF associated with the AC the PSDU belongs to.

void	ProtectionCompleted () override
	Transmit prepared frame upon successful protection mechanism.

void	ReceiveMgtAction (Ptr< const WifiMpdu > mpdu, const WifiTxVector &txVector)
	Process a received management action frame that relates to Block Ack agreement.

void	ReceiveMpdu (Ptr< const WifiMpdu > mpdu, RxSignalInfo rxSignalInfo, const WifiTxVector &txVector, bool inAmpdu) override
	This method handles the reception of an MPDU (possibly included in an A-MPDU)

void	ReleaseSequenceNumbers (Ptr< const WifiPsdu > psdu) const override
	Make the sequence numbers of MPDUs included in the given PSDU available again if the MPDUs have never been transmitted.

void	RetransmitMpduAfterMissedAck (Ptr< WifiMpdu > mpdu) const override
	Retransmit an MPDU that was not acknowledged.

bool	SendAddBaRequest (Mac48Address recipient, uint8_t tid, uint16_t startingSeq, uint16_t timeout, bool immediateBAck, Time availableTime)
	Sends an ADDBA Request to establish a block ack agreement with STA addressed by recipient for TID tid.

void	SendBlockAck (const RecipientBlockAckAgreement &agreement, Time durationId, WifiTxVector &blockAckTxVector, double rxSnr)
	Create a BlockAck frame with header equal to blockAck and start its transmission.

virtual bool	SendDataFrame (Ptr< WifiMpdu > peekedItem, Time availableTime, bool initialFrame)
	Given a non-broadcast QoS data frame, prepare the PSDU to transmit by attempting A-MSDU and A-MPDU aggregation (if enabled), while making sure that the frame exchange (possibly including protection and acknowledgment) is completed within the given available time.

virtual bool	SendMpduFromBaManager (Ptr< WifiMpdu > mpdu, Time availableTime, bool initialFrame)
	If the given MPDU contains a BlockAckReq frame (the duration of which plus the response fits within the given available time, if the latter is not Time::Min() and this is not the initial frame of a TXOP), transmit the frame and return true.

void	SendPsduWithProtection (Ptr< WifiPsdu > psdu, WifiTxParameters &txParams)
	Send a PSDU (A-MPDU or BlockAckReq frame) requesting a BlockAck frame or a BlockAckReq frame followed by a BlockAck frame for the acknowledgment.

void	TransmissionSucceeded () override
	Take necessary actions upon a transmission success.

Protected Member Functions inherited from ns3::QosFrameExchangeManager
virtual void	ClearTxopHolderIfNeeded ()
	Clear the TXOP holder if the NAV counted down to zero (includes the case of NAV reset).

void	DoDispose () override
	Destructor implementation.

virtual std::optional< Mac48Address >	FindTxopHolder (const WifiMacHeader &hdr, const WifiTxVector &txVector)
	Determine the holder of the TXOP, if possible, based on the received frame.

void	ForwardMpduDown (Ptr< WifiMpdu > mpdu, WifiTxVector &txVector) override
	Forward an MPDU down to the PHY layer.

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 transmitted with the given TX vector.

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.

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 the given TX vector.

void	NavResetTimeout () override
	Reset the NAV upon expiration of the NAV reset timer.

void	PifsRecovery ()
	Perform a PIFS recovery as a response to transmission failure within a TXOP.

void	PostProcessFrame (Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector) override
	Perform actions that are possibly needed after receiving any frame, independently of whether the frame is addressed to this station (e.g., setting the NAV or the TXOP holder).

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 is addressed to this station (e.g., storing buffer status reports).

void	ReceiveMpdu (Ptr< const WifiMpdu > mpdu, RxSignalInfo rxSignalInfo, const WifiTxVector &txVector, bool inAmpdu) override
	This method handles the reception of an MPDU (possibly included in an A-MPDU)

virtual bool	SendCfEndIfNeeded ()
	Send a CF-End frame to indicate the completion of the TXOP, provided that the remaining duration is long enough to transmit this frame.

virtual bool	StartTransmission (Ptr< QosTxop > edca, Time txopDuration)
	Request the FrameExchangeManager to start a frame exchange sequence.

void	TransmissionFailed () override
	Take necessary actions upon a transmission failure.

void	TransmissionSucceeded () override
	Take necessary actions upon a transmission success.

void	UpdateNav (Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector) override
	Update the NAV, if needed, based on the Duration/ID of the given psdu.

Protected Member Functions inherited from ns3::FrameExchangeManager
virtual void	DequeueMpdu (Ptr< const WifiMpdu > mpdu)
	Dequeue the given MPDU from the queue in which it is stored.

void	DoCtsTimeout (Ptr< WifiPsdu > psdu)
	Take required actions when the CTS timer fired after sending an RTS to protect the given PSDU expires.

void	DoSendCtsAfterRts (const WifiMacHeader &rtsHdr, WifiTxVector &ctsTxVector, double rtsSnr)
	Send CTS after receiving RTS.

Ptr< WifiMpdu >	GetFirstFragmentIfNeeded (Ptr< WifiMpdu > mpdu)
	Fragment the given MPDU if needed.

Ptr< WifiMpdu >	GetNextFragment ()
	Get the next fragment of the current MSDU.

virtual uint32_t	GetPsduSize (Ptr< const WifiMpdu > mpdu, const WifiTxVector &txVector) const
	Get the size in bytes of the given MPDU, which is to be transmitted with the given TXVECTOR.

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 PSDU addressed to the given receiver becomes ppduPayloadSize.

Ptr< WifiRemoteStationManager >	GetWifiRemoteStationManager () const

virtual void	NormalAckTimeout (Ptr< WifiMpdu > mpdu, const WifiTxVector &txVector)
	Called when the Ack timeout expires.

virtual void	NotifyChannelReleased (Ptr< Txop > txop)
	Notify the given Txop that channel has been released.

virtual void	PsduRxError (Ptr< const WifiPsdu > psdu)
	This method is called when the reception of a PSDU fails.

virtual void	ReceivedMacHdr (const WifiMacHeader &macHdr, const WifiTxVector &txVector, Time psduDuration)
	Store information about the MAC header of the MPDU being received.

virtual void	ReceivedNormalAck (Ptr< WifiMpdu > mpdu, const WifiTxVector &txVector, const WifiTxVector &ackTxVector, const RxSignalInfo &rxInfo, double snr)
	Perform the actions needed when a Normal Ack is received.

virtual void	Reset ()
	Reset this frame exchange manager.

virtual void	RxStartIndication (WifiTxVector txVector, Time psduDuration)

virtual void	SendCtsAfterRts (const WifiMacHeader &rtsHdr, WifiMode rtsTxMode, double rtsSnr)
	Send CTS after receiving RTS.

void	SendCtsToSelf (const WifiTxParameters &txParams)
	Send CTS for a CTS-to-self mechanism.

void	SendMpduWithProtection (Ptr< WifiMpdu > mpdu, WifiTxParameters &txParams)
	Send an MPDU with the given TX parameters (with the specified protection).

void	SendNormalAck (const WifiMacHeader &hdr, const WifiTxVector &dataTxVector, double dataSnr)
	Send Normal Ack.

void	SendRts (const WifiTxParameters &txParams)
	Send RTS to begin RTS-CTS-Data-Ack transaction.

virtual void	StartProtection (const WifiTxParameters &txParams)
	Start the protection mechanism indicated by the given TX parameters.

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 receiver has changed.

Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.

virtual void	DoInitialize ()
	Initialize() implementation.

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.

Protected Attributes
Ptr< MpduAggregator >	m_mpduAggregator
	A-MPDU aggregator.

Ptr< MsduAggregator >	m_msduAggregator
	A-MSDU aggregator.

std::map< AgreementKey, Ptr< WifiMpdu > >	m_pendingAddBaResp
	pending ADDBA_RESPONSE frames indexed by agreement key

Protected Attributes inherited from ns3::QosFrameExchangeManager
Ptr< QosTxop >	m_edca
	the EDCAF that gained channel access

bool	m_setQosQueueSize
	whether to set the Queue Size subfield of the QoS Control field of QoS data frames

std::optional< Mac48Address >	m_txopHolder
	MAC address of the TXOP holder.

Protected Attributes inherited from ns3::FrameExchangeManager
AckedMpdu	m_ackedMpduCallback
	the acknowledged MPDU callback

MHz_u	m_allowedWidth
	the allowed width for the current transmission

Mac48Address	m_bssid
	BSSID address (Mac48Address)

Ptr< ChannelAccessManager >	m_channelAccessManager
	the channel access manager

Ptr< Txop >	m_dcf
	the DCF/EDCAF that gained channel access

DroppedMpdu	m_droppedMpduCallback
	the dropped MPDU callback

uint8_t	m_linkId
	the ID of the link this object is associated with

Ptr< WifiMac >	m_mac
	the MAC layer on this station

Time	m_navEnd
	NAV expiration time.

EventId	m_navResetEvent
	the event to reset the NAV after an RTS

Ptr< WifiPhy >	m_phy
	the PHY layer on this station

bool	m_promisc
	Flag if the device is operating in promiscuous mode.

std::set< Mac48Address >	m_protectedStas
	STAs that have replied to an RTS in this TXOP.

Ptr< MacRxMiddle >	m_rxMiddle
	the MAC RX Middle on this station

Mac48Address	m_self
	the MAC address of this device

std::set< Mac48Address >	m_sentRtsTo
	the STA(s) which we sent an RTS to (waiting for CTS)

Ptr< MacTxMiddle >	m_txMiddle
	the MAC TX Middle on this station

WifiTxTimer	m_txTimer
	the timer set upon frame transmission

Private Member Functions
void	SendPsdu ()
	Send the current PSDU, which can be acknowledged by a BlockAck frame or followed by a BlockAckReq frame and a BlockAck frame.

Private Attributes
Ptr< WifiPsdu >	m_psdu
	the A-MPDU being transmitted

WifiTxParameters	m_txParams
	the TX parameters for the current frame

Friends
class	::AmpduAggregationTest
	allow AmpduAggregationTest class access

Additional Inherited Members
Public Types inherited from ns3::FrameExchangeManager
typedef Callback< void, Ptr< const WifiMpdu > >	AckedMpdu
	typedef for a callback to invoke when an MPDU is successfully acknowledged.

typedef Callback< void, WifiMacDropReason, Ptr< const WifiMpdu > >	DroppedMpdu
	typedef for a callback to invoke when an MPDU is dropped.

Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

HtFrameExchangeManager handles the frame exchange sequences for HT stations.

Definition at line 31 of file ht-frame-exchange-manager.h.

Member Typedef Documentation

◆ AgreementKey

typedef std::pair<Mac48Address, uint8_t> ns3::HtFrameExchangeManager::AgreementKey

protected

agreement key typedef (MAC address and TID)

Definition at line 347 of file ht-frame-exchange-manager.h.

Constructor & Destructor Documentation

◆ HtFrameExchangeManager()

ns3::HtFrameExchangeManager::HtFrameExchangeManager ( )

Definition at line 49 of file ht-frame-exchange-manager.cc.

References ns3::CreateObject(), m_mpduAggregator, m_msduAggregator, and NS_LOG_FUNCTION.

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◆ ~HtFrameExchangeManager()

ns3::HtFrameExchangeManager::~HtFrameExchangeManager ( )

override

Definition at line 56 of file ht-frame-exchange-manager.cc.

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

◆ BlockAckTimeout()

void ns3::HtFrameExchangeManager::BlockAckTimeout	(	Ptr< WifiPsdu >	psdu,
		const WifiTxVector &	txVector )

protectedvirtual

Called when the BlockAck timeout expires.

Parameters

psdu	the PSDU (BlockAckReq or A-MPDU) that solicited a BlockAck response
txVector	the TXVECTOR used to send the PSDU that solicited a BlockAck response

Reimplemented in ns3::HeFrameExchangeManager.

Definition at line 1336 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::QosFrameExchangeManager::m_edca, ns3::FrameExchangeManager::m_linkId, m_psdu, MissedBlockAck(), NS_ASSERT, NS_LOG_FUNCTION, ns3::Txop::ResetCw(), ns3::QosFrameExchangeManager::TransmissionFailed(), and ns3::Txop::UpdateFailedCw().

Referenced by SendPsdu().

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◆ CalculateAcknowledgmentTime()

void ns3::HtFrameExchangeManager::CalculateAcknowledgmentTime ( WifiAcknowledgment * acknowledgment ) const

overridevirtual

Calculate the time required to acknowledge a frame according to the given acknowledgment method.

The acknowledgment time is stored in the acknowledgment object itself.

Parameters

acknowledgment the acknowledgment method

Reimplemented from ns3::FrameExchangeManager.

Definition at line 629 of file ht-frame-exchange-manager.cc.

References ns3::WifiAcknowledgment::BAR_BLOCK_ACK, ns3::WifiAcknowledgment::BLOCK_ACK, ns3::FrameExchangeManager::CalculateAcknowledgmentTime(), ns3::WifiPhy::CalculateTxDuration(), ns3::GetBlockAckRequestSize(), ns3::GetBlockAckSize(), ns3::WifiPhy::GetPhyBand(), ns3::WifiPhy::GetSifs(), ns3::FrameExchangeManager::m_phy, ns3::WifiAcknowledgment::method, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by SendPsduWithProtection(), and TryAggregateMsdu().

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◆ CtsTimeout()

void ns3::HtFrameExchangeManager::CtsTimeout	(	Ptr< WifiMpdu >	rts,
		const WifiTxVector &	txVector )

overrideprotectedvirtual

Called when the CTS timeout expires.

Parameters

rts	the RTS that solicited a CTS response
txVector	the TXVECTOR used to transmit the RTS frame

Reimplemented from ns3::FrameExchangeManager.

Definition at line 960 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::CtsTimeout(), ns3::FrameExchangeManager::DoCtsTimeout(), m_psdu, and NS_LOG_FUNCTION.

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◆ DequeuePsdu()

void ns3::HtFrameExchangeManager::DequeuePsdu ( Ptr< const WifiPsdu > psdu )

protected

Dequeue the MPDUs of the given PSDU from the queue in which they are stored.

Parameters

psdu	the given PSDU

Definition at line 1113 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::DequeueMpdu(), NS_LOG_DEBUG, and ns3::PeekPointer().

Referenced by ns3::HeFrameExchangeManager::DoCtsAfterMuRtsTimeout(), MissedBlockAck(), ReceiveMpdu(), and SendPsdu().

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◆ DoDispose()

void ns3::HtFrameExchangeManager::DoDispose ( )

overrideprotectedvirtual

Destructor implementation.

This method is called by Dispose() or by the Object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overridden version of this method and chain up to their parent's implementation once they are done. i.e, for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose() method.

It is safe to call GetObject() from within this method.

Reimplemented from ns3::FrameExchangeManager.

Definition at line 62 of file ht-frame-exchange-manager.cc.

References ns3::WifiTxParameters::Clear(), ns3::QosFrameExchangeManager::DoDispose(), m_mpduAggregator, m_msduAggregator, m_pendingAddBaResp, m_psdu, m_txParams, and NS_LOG_FUNCTION.

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◆ EndReceiveAmpdu()

void ns3::HtFrameExchangeManager::EndReceiveAmpdu	(	Ptr< const WifiPsdu >	psdu,
		const RxSignalInfo &	rxSignalInfo,
		const WifiTxVector &	txVector,
		const std::vector< bool > &	perMpduStatus )

overrideprotectedvirtual

This method is called when the reception of an A-MPDU including multiple MPDUs is completed.

Parameters

psdu	the received PSDU
rxSignalInfo	the info on the received signal (

See also: RxSignalInfo)

Parameters

txVector	TxVector of the received PSDU
perMpduStatus	per MPDU reception status

Reimplemented from ns3::FrameExchangeManager.

Definition at line 1760 of file ht-frame-exchange-manager.cc.

References ns3::WifiPhy::GetSifs(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_phy, ns3::WifiMacHeader::NORMAL_ACK, NS_ASSERT, NS_LOG_DEBUG, ns3::Simulator::Schedule(), SendBlockAck(), and ns3::RxSignalInfo::snr.

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◆ FinalizeMacHeader()

void ns3::HtFrameExchangeManager::FinalizeMacHeader ( Ptr< const WifiPsdu > psdu )

overrideprotectedvirtual

Finalize the MAC header of the MPDUs in the given PSDU before transmission.

Tasks performed by this method include setting the Power Management flag in the MAC header.

Parameters

psdu	the given PSDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 1078 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::FinalizeMacHeader(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsQosEosp(), ns3::FrameExchangeManager::m_mac, ns3::QosFrameExchangeManager::m_setQosQueueSize, NS_LOG_FUNCTION, ns3::PeekPointer(), ns3::WifiMacHeader::SetQosEosp(), ns3::WifiMacHeader::SetQosQueueSize(), and ns3::STA.

Referenced by ForwardPsduDown().

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◆ ForwardMpduDown()

void ns3::HtFrameExchangeManager::ForwardMpduDown	(	Ptr< WifiMpdu >	mpdu,
		WifiTxVector &	txVector )

overrideprotectedvirtual

Forward an MPDU down to the PHY layer.

Parameters

mpdu	the MPDU to forward down
txVector	the TXVECTOR used to transmit the MPDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 663 of file ht-frame-exchange-manager.cc.

References ForwardPsduDown(), and GetWifiPsdu().

Referenced by ns3::HeFrameExchangeManager::SendMuRts(), and SendPsdu().

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◆ ForwardPsduDown()

void ns3::HtFrameExchangeManager::ForwardPsduDown	(	Ptr< const WifiPsdu >	psdu,
		WifiTxVector &	txVector )

protectedvirtual

Forward a PSDU down to the PHY layer.

Also, notify the Block Ack Manager of the transmission of the constituent MPDUs.

Parameters

psdu	the PSDU to forward down
txVector	the TXVECTOR used to transmit the MPDU

Reimplemented in ns3::EhtFrameExchangeManager.

Definition at line 1124 of file ht-frame-exchange-manager.cc.

References FinalizeMacHeader(), ns3::WifiTxVector::GetChannelWidth(), ns3::FrameExchangeManager::m_allowedWidth, ns3::FrameExchangeManager::m_phy, NotifyTxToEdca(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::WifiPhy::Send(), and ns3::WifiTxVector::SetAggregation().

Referenced by ForwardMpduDown(), ns3::EhtFrameExchangeManager::ForwardPsduDown(), SendBlockAck(), SendPsdu(), and ns3::HeFrameExchangeManager::SendPsduMap().

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◆ GetBaManager()

Ptr< BlockAckManager > ns3::HtFrameExchangeManager::GetBaManager ( uint8_t tid ) const

protected

Get the Block Ack Manager handling the given TID.

Parameters

tid	the given TID

Returns: the Block Ack Manager handling the given TID

Definition at line 94 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::m_mac.

Referenced by MissedBlockAck(), NotifyPacketDiscarded(), NotifyReceivedNormalAck(), ReceiveMgtAction(), ReceiveMpdu(), SendAddBaRequest(), SendAddBaResponse(), and SendPsdu().

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◆ GetBar()

Ptr< WifiMpdu > ns3::HtFrameExchangeManager::GetBar	(	AcIndex	ac,
		std::optional< uint8_t >	optTid = std::nullopt,
		std::optional< Mac48Address >	optAddress = std::nullopt )

Get the next BlockAckRequest or MU-BAR Trigger Frame to send, if any.

If TID and recipient address are given, then only return a BlockAckRequest, if any, addressed to that recipient and for the given TID.

Parameters

ac	the AC whose queue is searched for BlockAckRequest or Trigger Frames
optTid	the TID (optional)
optAddress	the recipient of the BAR (optional)

Returns: the next BAR or Trigger Frame to be sent, if any

Definition at line 399 of file ht-frame-exchange-manager.cc.

References ns3::Create(), ns3::FrameExchangeManager::DequeueMpdu(), ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_self, NS_ASSERT, NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::CtrlBAckRequestHeader::SetStartingSequence(), ns3::WIFI_CTL_QUEUE, and ns3::WIFI_UNICAST.

Referenced by ns3::HeFrameExchangeManager::StartFrameExchange(), StartFrameExchange(), and TransmissionSucceeded().

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◆ GetMpduAggregator()

Ptr< MpduAggregator > ns3::HtFrameExchangeManager::GetMpduAggregator ( ) const

Returns the aggregator used to construct A-MPDU subframes.

Returns: the aggregator used to construct A-MPDU subframes.

Definition at line 88 of file ht-frame-exchange-manager.cc.

References m_mpduAggregator.

◆ GetMsduAggregator()

Ptr< MsduAggregator > ns3::HtFrameExchangeManager::GetMsduAggregator ( ) const

Returns the aggregator used to construct A-MSDU subframes.

Returns: the aggregator used to construct A-MSDU subframes.

Definition at line 82 of file ht-frame-exchange-manager.cc.

References m_msduAggregator.

◆ GetPsduDurationId()

Time ns3::HtFrameExchangeManager::GetPsduDurationId	(	Time	txDuration,
		const WifiTxParameters &	txParams ) const

protectedvirtual

Compute how to set the Duration/ID field of PSDUs that do not include fragments.

Parameters

txDuration	the duration of the PSDU transmission
txParams	the TX parameters used to send the PSDU

Returns: the value for the Duration/ID field

Definition at line 882 of file ht-frame-exchange-manager.cc.

References ns3::QosTxop::GetRemainingTxop(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), ns3::WifiTxParameters::m_acknowledgment, ns3::QosFrameExchangeManager::m_edca, ns3::FrameExchangeManager::m_linkId, NS_ASSERT, NS_LOG_FUNCTION, and ns3::Seconds().

Referenced by SendPsdu(), and ns3::HeFrameExchangeManager::SendPsduMap().

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◆ GetTypeId()

TypeId ns3::HtFrameExchangeManager::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 40 of file ht-frame-exchange-manager.cc.

References ns3::TypeId::SetParent().

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◆ GetWifiPsdu()

Ptr< WifiPsdu > ns3::HtFrameExchangeManager::GetWifiPsdu	(	Ptr< WifiMpdu >	mpdu,
		const WifiTxVector &	txVector ) const

protectedvirtual

Get a PSDU containing the given MPDU.

Parameters

mpdu	the given MPDU
txVector	the TXVECTOR to use to send the MPDU

Returns: a PSDU containing the given MPDU

Reimplemented in ns3::VhtFrameExchangeManager.

Definition at line 669 of file ht-frame-exchange-manager.cc.

References ns3::Create().

Referenced by ForwardMpduDown(), SendBlockAck(), and SendMpduFromBaManager().

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◆ IsWithinAmpduSizeLimit()

bool ns3::HtFrameExchangeManager::IsWithinAmpduSizeLimit	(	uint32_t	ampduSize,
		Mac48Address	receiver,
		uint8_t	tid,
		WifiModulationClass	modulation ) const

virtual

Check whether an A-MPDU of the given size meets the constraint on the maximum size for A-MPDUs sent to the given receiver, belonging to the given TID and transmitted using the given modulation class.

Parameters

ampduSize	the size in bytes of the A-MPDU.
receiver	the address of the station that is the receiver of the A-MPDU
tid	the TID of the A-MPDU
modulation	the modulation class used to transmit the A-MPDU

Returns: true if the constraint on the max A-MPDU size is met.

Definition at line 1185 of file ht-frame-exchange-manager.cc.

References m_mpduAggregator, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by IsWithinLimitsIfAddMpdu(), and IsWithinLimitsIfAggregateMsdu().

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◆ IsWithinLimitsIfAddMpdu()

bool ns3::HtFrameExchangeManager::IsWithinLimitsIfAddMpdu	(	Ptr< const WifiMpdu >	mpdu,
		const WifiTxParameters &	txParams,
		Time	ppduDurationLimit ) const

overridevirtual

Check if the PSDU obtained by aggregating the given MPDU to the PSDU specified by the given TX parameters meets the constraints on the maximum A-MPDU size and its transmission time does not exceed the given PPDU duration limit (if different than Time::Min()).

Parameters

mpdu	the given MPDU
txParams	the TX parameters
ppduDurationLimit	the constraint on the PPDU transmission time

Returns: true if the size and time constraints are met, false otherwise

Reimplemented from ns3::QosFrameExchangeManager.

Definition at line 1142 of file ht-frame-exchange-manager.cc.

References ns3::WifiTxVector::GetModulationClass(), ns3::WifiTxParameters::GetPsduInfo(), ns3::WifiTxParameters::GetSize(), IsWithinAmpduSizeLimit(), ns3::QosFrameExchangeManager::IsWithinSizeAndTimeLimits(), ns3::WifiTxParameters::LastAddedIsFirstMpdu(), ns3::WifiTxParameters::m_txVector, NS_ABORT_MSG, NS_ASSERT, NS_LOG_FUNCTION, and ns3::WifiTxParameters::PsduInfo::seqNumbers.

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◆ IsWithinLimitsIfAggregateMsdu()

bool ns3::HtFrameExchangeManager::IsWithinLimitsIfAggregateMsdu	(	Ptr< const WifiMpdu >	msdu,
		const WifiTxParameters &	txParams,
		Time	ppduDurationLimit ) const

virtual

Check if the PSDU obtained by aggregating the given MSDU to the PSDU specified by the given TX parameters meets the constraints on the maximum A-MSDU size and its transmission time does not exceed the given PPDU duration limit (if different than Time::Min()).

Parameters

msdu	the given MSDU
txParams	the TX parameters
ppduDurationLimit	the constraint on the PPDU transmission time

Returns: true if the size and time constraints are met, false otherwise

Definition at line 1289 of file ht-frame-exchange-manager.cc.

References ns3::WifiTxParameters::PsduInfo::ampduSize, ns3::WifiTxVector::GetModulationClass(), ns3::WifiTxParameters::GetPsduInfo(), ns3::WifiTxParameters::GetSize(), IsWithinAmpduSizeLimit(), ns3::QosFrameExchangeManager::IsWithinSizeAndTimeLimits(), m_msduAggregator, ns3::WifiTxParameters::m_txVector, NS_ASSERT, NS_ASSERT_MSG, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by TryAggregateMsdu().

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◆ MissedBlockAck()

void ns3::HtFrameExchangeManager::MissedBlockAck	(	Ptr< WifiPsdu >	psdu,
		const WifiTxVector &	txVector,
		bool &	resetCw )

protectedvirtual

Take necessary actions when a BlockAck is missed, such as scheduling a BlockAckReq frame or the retransmission of the unacknowledged frames.

Parameters

	psdu	the PSDU (BlockAckReq or A-MPDU) that solicited a BlockAck response
	txVector	the TXVECTOR used to send the PSDU that solicited a BlockAck response
[out]	resetCw	true if we shall stop retransmitting the PSDU

The BlockAckReq must be sent on the same link as the data frames to avoid issues. As an example, assume that an A-MPDU is sent on link 0, the BlockAck timer expires and the BlockAckReq is sent on another link (e.g., on link 1). When the originator processes the BlockAck response, it will not interpret a '0' in the bitmap corresponding to the transmitted MPDUs as a negative acknowledgment, because the BlockAck is received on a different link than the one on which the MPDUs are (still) inflight. Hence, such MPDUs stay inflight and are not retransmitted.

Definition at line 1361 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::DequeueMpdu(), DequeuePsdu(), GetBaManager(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, NotifyPacketDiscarded(), NS_ABORT_MSG_IF, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::PeekPointer().

Referenced by BlockAckTimeout().

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◆ NeedSetupBlockAck()

bool ns3::HtFrameExchangeManager::NeedSetupBlockAck	(	Mac48Address	recipient,
		uint8_t	tid )

protectedvirtual

A Block Ack agreement needs to be established with the given recipient for the given TID if it does not already exist (or exists and is in state RESET) and:

the number of packets in the queue reaches the BlockAckThreshold value OR
MPDU aggregation is enabled and there is more than one packet in the queue OR
the station is a VHT station

Parameters

recipient	address of the recipient.
tid	traffic ID.

Returns: true if a Block Ack agreement needs to be established, false otherwise.

Definition at line 100 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, m_mpduAggregator, NS_LOG_FUNCTION, ns3::WIFI_MOD_CLASS_HT, ns3::WIFI_QOSDATA_QUEUE, and ns3::WIFI_UNICAST.

Referenced by StartFrameExchange().

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◆ NotifyPacketDiscarded()

void ns3::HtFrameExchangeManager::NotifyPacketDiscarded ( Ptr< const WifiMpdu > mpdu )

overrideprotectedvirtual

Pass the given MPDU, discarded because of the max retry limit was reached, to the MPDU dropped callback.

Parameters

mpdu	the discarded MPDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 766 of file ht-frame-exchange-manager.cc.

References ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_ADDBA_REQUEST, ns3::WifiActionHeader::ActionValue::blockAck, ns3::WifiActionHeader::GetAction(), GetBaManager(), ns3::WifiActionHeader::GetCategory(), ns3::GetTid(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::NotifyPacketDiscarded(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosTxop::ResetBa(), and ns3::Simulator::Schedule().

Referenced by ns3::HeFrameExchangeManager::DoCtsAfterMuRtsTimeout(), and MissedBlockAck().

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◆ NotifyReceivedNormalAck()

void ns3::HtFrameExchangeManager::NotifyReceivedNormalAck ( Ptr< WifiMpdu > mpdu )

overrideprotectedvirtual

Notify other components that an MPDU was acknowledged.

Parameters

mpdu	the MPDU that was acknowledged

Reimplemented from ns3::FrameExchangeManager.

Definition at line 675 of file ht-frame-exchange-manager.cc.

References ns3::QosTxop::AddBaResponseTimeout(), ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_ADDBA_REQUEST, ns3::WifiActionHeader::BLOCK_ACK_ADDBA_RESPONSE, ns3::WifiActionHeader::BLOCK_ACK_DELBA, ns3::WifiActionHeader::ActionValue::blockAck, ns3::WifiActionHeader::GetAction(), GetBaManager(), ns3::WifiActionHeader::GetCategory(), ns3::MgtAddBaRequestHeader::GetTid(), ns3::MgtAddBaResponseHeader::GetTid(), ns3::MgtDelBaHeader::GetTid(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::MgtDelBaHeader::IsByOriginator(), ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, m_pendingAddBaResp, ns3::FrameExchangeManager::NotifyReceivedNormalAck(), NS_ASSERT_MSG, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

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◆ NotifyTxToEdca()

void ns3::HtFrameExchangeManager::NotifyTxToEdca ( Ptr< const WifiPsdu > psdu ) const

protectedvirtual

Notify the transmission of the given PSDU to the EDCAF associated with the AC the PSDU belongs to.

Parameters

psdu	the PSDU to transmit

Definition at line 1061 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::m_mac, NS_LOG_FUNCTION, and ns3::PeekPointer().

Referenced by ForwardPsduDown().

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◆ ProtectionCompleted()

void ns3::HtFrameExchangeManager::ProtectionCompleted ( )

overrideprotectedvirtual

Transmit prepared frame upon successful protection mechanism.

Reimplemented from ns3::FrameExchangeManager.

Definition at line 946 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::m_protectedStas, m_psdu, ns3::FrameExchangeManager::m_sentRtsTo, NS_LOG_FUNCTION, ns3::FrameExchangeManager::ProtectionCompleted(), and SendPsdu().

Referenced by ReceiveMpdu().

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◆ ReceiveMgtAction()

void ns3::HtFrameExchangeManager::ReceiveMgtAction	(	Ptr< const WifiMpdu >	mpdu,
		const WifiTxVector &	txVector )

protected

Process a received management action frame that relates to Block Ack agreement.

Parameters

mpdu	the MPDU carrying the received management action frame
txVector	the TXVECTOR used to transmit the management action frame

Definition at line 1670 of file ht-frame-exchange-manager.cc.

References ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_ADDBA_REQUEST, ns3::WifiActionHeader::BLOCK_ACK_ADDBA_RESPONSE, ns3::WifiActionHeader::BLOCK_ACK_DELBA, ns3::WifiActionHeader::ActionValue::blockAck, ns3::WifiPhy::CalculateTxDuration(), ns3::GetAckSize(), ns3::WifiActionHeader::GetAction(), GetBaManager(), ns3::WifiActionHeader::GetCategory(), ns3::WifiPhy::GetPhyBand(), ns3::WifiPhy::GetSifs(), ns3::MgtDelBaHeader::GetTid(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::MgtDelBaHeader::IsByOriginator(), ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_phy, NS_ASSERT, NS_FATAL_ERROR, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), and SendAddBaResponse().

Referenced by ReceiveMpdu().

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◆ ReceiveMpdu()

void ns3::HtFrameExchangeManager::ReceiveMpdu	(	Ptr< const WifiMpdu >	mpdu,
		RxSignalInfo	rxSignalInfo,
		const WifiTxVector &	txVector,
		bool	inAmpdu )

overrideprotectedvirtual

This method handles the reception of an MPDU (possibly included in an A-MPDU)

Parameters

mpdu	the received MPDU
rxSignalInfo	the info on the received signal (

See also: RxSignalInfo)

Parameters

txVector	TxVector of the received PSDU
inAmpdu	true if the MPDU is part of an A-MPDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 1514 of file ht-frame-exchange-manager.cc.

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◆ ReleaseSequenceNumbers()

void ns3::HtFrameExchangeManager::ReleaseSequenceNumbers ( Ptr< const WifiPsdu > psdu ) const

overrideprotectedvirtual

Make the sequence numbers of MPDUs included in the given PSDU available again if the MPDUs have never been transmitted.

Parameters

psdu	the given PSDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 832 of file ht-frame-exchange-manager.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsRetry(), ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_txMiddle, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::FrameExchangeManager::ReleaseSequenceNumbers(), and ns3::SEQNO_SPACE_SIZE.

Referenced by ns3::HeFrameExchangeManager::DoCtsAfterMuRtsTimeout().

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◆ RetransmitMpduAfterMissedAck()

void ns3::HtFrameExchangeManager::RetransmitMpduAfterMissedAck ( Ptr< WifiMpdu > mpdu ) const

overrideprotectedvirtual

Retransmit an MPDU that was not acknowledged.

Parameters

mpdu	the MPDU to retransmit

Reimplemented from ns3::FrameExchangeManager.

Definition at line 812 of file ht-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, NS_LOG_FUNCTION, and ns3::FrameExchangeManager::RetransmitMpduAfterMissedAck().

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◆ SendAddBaRequest()

bool ns3::HtFrameExchangeManager::SendAddBaRequest	(	Mac48Address	recipient,
		uint8_t	tid,
		uint16_t	startingSeq,
		uint16_t	timeout,
		bool	immediateBAck,
		Time	availableTime )

protected

Sends an ADDBA Request to establish a block ack agreement with STA addressed by recipient for TID tid.

Parameters

recipient	address of the recipient.
tid	traffic ID.
startingSeq	the BA agreement starting sequence number
timeout	timeout value.
immediateBAck	flag to indicate whether immediate BlockAck is used.
availableTime	the amount of time allowed for the frame exchange. Equals Time::Min() in case the TXOP limit is null

Returns: true if ADDBA Request frame is transmitted, false otherwise

Definition at line 138 of file ht-frame-exchange-manager.cc.

Referenced by StartFrameExchange().

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◆ SendAddBaResponse()

void ns3::HtFrameExchangeManager::SendAddBaResponse	(	const MgtAddBaRequestHeader &	reqHdr,
		Mac48Address	originator )

This method can be called to accept a received ADDBA Request.

An ADDBA Response will be constructed and queued for transmission.

Parameters

reqHdr	the received ADDBA Request header.
originator	the MAC address of the originator.

Definition at line 212 of file ht-frame-exchange-manager.cc.

Referenced by ReceiveMgtAction().

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◆ SendBlockAck()

void ns3::HtFrameExchangeManager::SendBlockAck	(	const RecipientBlockAckAgreement &	agreement,
		Time	durationId,
		WifiTxVector &	blockAckTxVector,
		double	rxSnr )

protected

Create a BlockAck frame with header equal to blockAck and start its transmission.

Parameters

agreement	the agreement the Block Ack response belongs to
durationId	the Duration/ID of the frame soliciting this Block Ack response
blockAckTxVector	the transmit vector for the Block Ack response
rxSnr	the receive SNR

Definition at line 1463 of file ht-frame-exchange-manager.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::Create(), ns3::RecipientBlockAckAgreement::FillBlockAckBitmap(), ForwardPsduDown(), ns3::BlockAckAgreement::GetBlockAckType(), ns3::BlockAckAgreement::GetPeer(), ns3::WifiPhy::GetPhyBand(), ns3::WifiPhy::GetSifs(), ns3::BlockAckAgreement::GetTid(), GetWifiPsdu(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::Time::IsStrictlyNegative(), ns3::FrameExchangeManager::m_phy, ns3::FrameExchangeManager::m_self, NS_LOG_FUNCTION, ns3::Seconds(), ns3::SnrTag::Set(), ns3::WifiMacHeader::SetAddr1(), ns3::WifiMacHeader::SetAddr2(), ns3::WifiMacHeader::SetDsNotFrom(), ns3::WifiMacHeader::SetDsNotTo(), ns3::CtrlBAckResponseHeader::SetTidInfo(), ns3::CtrlBAckResponseHeader::SetType(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_BACKRESP.

Referenced by EndReceiveAmpdu(), and ReceiveMpdu().

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◆ SendDataFrame()

bool ns3::HtFrameExchangeManager::SendDataFrame	(	Ptr< WifiMpdu >	peekedItem,
		Time	availableTime,
		bool	initialFrame )

protectedvirtual

Given a non-broadcast QoS data frame, prepare the PSDU to transmit by attempting A-MSDU and A-MPDU aggregation (if enabled), while making sure that the frame exchange (possibly including protection and acknowledgment) is completed within the given available time.

Parameters

peekedItem	the given non-broadcast QoS data frame
availableTime	the amount of time allowed for the frame exchange. Equals Time::Min() in case the TXOP limit is null
initialFrame	true if the frame being transmitted is the initial frame of the TXOP. This is used to determine whether the TXOP limit can be exceeded

Returns: true if frame is transmitted, false otherwise

Definition at line 582 of file ht-frame-exchange-manager.cc.

References ns3::WifiAcknowledgment::BAR_BLOCK_ACK, ns3::Create(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::WifiTxParameters::m_acknowledgment, ns3::FrameExchangeManager::m_allowedWidth, ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_mac, m_mpduAggregator, ns3::WifiTxParameters::m_txVector, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::FrameExchangeManager::SendMpduWithProtection(), and SendPsduWithProtection().

Referenced by StartFrameExchange().

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◆ SendDelbaFrame()

void ns3::HtFrameExchangeManager::SendDelbaFrame	(	Mac48Address	addr,
		uint8_t	tid,
		bool	byOriginator )

Sends DELBA frame to cancel a block ack agreement with STA addressed by addr for TID tid.

Parameters

addr	address of the recipient.
tid	traffic ID.
byOriginator	flag to indicate whether this is set by the originator.

Definition at line 311 of file ht-frame-exchange-manager.cc.

References ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_DELBA, ns3::Create(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::FrameExchangeManager::m_bssid, ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_self, NS_LOG_FUNCTION, ns3::WifiActionHeader::SetAction(), ns3::WifiMacHeader::SetAddr1(), ns3::WifiMacHeader::SetAddr2(), ns3::WifiMacHeader::SetAddr3(), ns3::MgtDelBaHeader::SetByOriginator(), ns3::MgtDelBaHeader::SetByRecipient(), ns3::WifiMacHeader::SetDsNotFrom(), ns3::WifiMacHeader::SetDsNotTo(), ns3::MgtDelBaHeader::SetTid(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_MGT_ACTION.

Referenced by SendAddBaResponse().

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◆ SendMpduFromBaManager()

bool ns3::HtFrameExchangeManager::SendMpduFromBaManager	(	Ptr< WifiMpdu >	mpdu,
		Time	availableTime,
		bool	initialFrame )

protectedvirtual

If the given MPDU contains a BlockAckReq frame (the duration of which plus the response fits within the given available time, if the latter is not Time::Min() and this is not the initial frame of a TXOP), transmit the frame and return true.

Otherwise, return false.

Parameters

mpdu	the given MPDU
availableTime	the amount of time allowed for the frame exchange. Equals Time::Min() in case the TXOP limit is null
initialFrame	true if the frame being transmitted is the initial frame of the TXOP. This is used to determine whether the TXOP limit can be exceeded

Returns: true if frame is transmitted, false otherwise

Definition at line 543 of file ht-frame-exchange-manager.cc.

References ns3::WifiAcknowledgment::BLOCK_ACK, GetWifiPsdu(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::WifiTxParameters::m_acknowledgment, ns3::FrameExchangeManager::m_allowedWidth, ns3::WifiTxParameters::m_txVector, NS_ABORT_IF, NS_LOG_DEBUG, NS_LOG_FUNCTION, SendPsduWithProtection(), and ns3::QosFrameExchangeManager::TryAddMpdu().

Referenced by StartFrameExchange().

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◆ SendPsdu()

void ns3::HtFrameExchangeManager::SendPsdu ( )

private

Send the current PSDU, which can be acknowledged by a BlockAck frame or followed by a BlockAckReq frame and a BlockAck frame.

Definition at line 977 of file ht-frame-exchange-manager.cc.

References ns3::WifiAcknowledgment::BAR_BLOCK_ACK, ns3::WifiPsdu::begin(), ns3::WifiAcknowledgment::BLOCK_ACK, BlockAckTimeout(), ns3::WifiPhy::CalculatePhyPreambleAndHeaderDuration(), ns3::WifiPhy::CalculateTxDuration(), DequeuePsdu(), ForwardMpduDown(), ForwardPsduDown(), ns3::WifiPsdu::GetAckPolicyForTid(), ns3::WifiPsdu::GetAddr1(), GetBaManager(), ns3::WifiPsdu::GetNMpdus(), ns3::WifiPhy::GetPhyBand(), GetPsduDurationId(), ns3::WifiPhy::GetSifs(), ns3::WifiPsdu::GetSize(), ns3::WifiPhy::GetSlot(), ns3::WifiPsdu::GetTids(), ns3::WifiTxTimer::IsRunning(), ns3::WifiTxParameters::m_acknowledgment, ns3::FrameExchangeManager::m_channelAccessManager, ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_phy, m_psdu, m_txParams, ns3::FrameExchangeManager::m_txTimer, ns3::WifiTxParameters::m_txVector, ns3::WifiMacHeader::NO_ACK, ns3::WifiAcknowledgment::NONE, NS_ABORT_MSG, NS_ABORT_MSG_IF, NS_ASSERT, NS_ASSERT_MSG, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), ns3::WifiTxTimer::Set(), ns3::WifiPsdu::SetDuration(), timeout, TransmissionSucceeded(), and ns3::WifiTxTimer::WAIT_BLOCK_ACK.

Referenced by ProtectionCompleted().

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◆ SendPsduWithProtection()

void ns3::HtFrameExchangeManager::SendPsduWithProtection	(	Ptr< WifiPsdu >	psdu,
		WifiTxParameters &	txParams )

protected

Send a PSDU (A-MPDU or BlockAckReq frame) requesting a BlockAck frame or a BlockAckReq frame followed by a BlockAck frame for the acknowledgment.

Note that txParams is moved to m_txParams and hence is left in an undefined state.

Parameters

psdu	the PSDU to send
txParams	the TX parameters to use to transmit the PSDU

Definition at line 903 of file ht-frame-exchange-manager.cc.

References CalculateAcknowledgmentTime(), ns3::WifiTxParameters::m_acknowledgment, ns3::FrameExchangeManager::m_linkId, ns3::WifiTxParameters::m_protection, m_psdu, m_txParams, ns3::WifiProtection::NONE, NS_ASSERT, NS_LOG_FUNCTION, ns3::PeekPointer(), ns3::WifiAckManager::SetQosAckPolicy(), and ns3::FrameExchangeManager::StartProtection().

Referenced by SendDataFrame(), and SendMpduFromBaManager().

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◆ SetWifiMac()

void ns3::HtFrameExchangeManager::SetWifiMac ( const Ptr< WifiMac > mac )

overridevirtual

Set the MAC layer to use.

Parameters

mac	the MAC layer to use

Reimplemented from ns3::FrameExchangeManager.

Definition at line 74 of file ht-frame-exchange-manager.cc.

References m_mpduAggregator, m_msduAggregator, and ns3::FrameExchangeManager::SetWifiMac().

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◆ StartFrameExchange()

bool ns3::HtFrameExchangeManager::StartFrameExchange	(	Ptr< QosTxop >	edca,
		Time	availableTime,
		bool	initialFrame )

overridevirtual

Start a frame exchange (including protection frames and acknowledgment frames as needed) that fits within the given availableTime (if different than Time::Min()).

Parameters

edca	the EDCAF which has been granted the opportunity to transmit
availableTime	the amount of time allowed for the frame exchange. Pass Time::Min() in case the TXOP limit is null
initialFrame	true if the frame being transmitted is the initial frame of the TXOP. This is used to determine whether the TXOP limit can be exceeded

Returns: true if a frame exchange is started, false otherwise

Reimplemented from ns3::QosFrameExchangeManager.

Definition at line 340 of file ht-frame-exchange-manager.cc.

References ns3::QosFrameExchangeManager::CreateAliasIfNeeded(), ns3::WifiMacHeader::GetAddr1(), GetBar(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::FrameExchangeManager::GetWifiRemoteStationManager(), ns3::Mac48Address::IsGroup(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsRetry(), ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_txMiddle, NeedSetupBlockAck(), NS_LOG_DEBUG, NS_LOG_FUNCTION, SendAddBaRequest(), SendDataFrame(), SendMpduFromBaManager(), and ns3::QosFrameExchangeManager::StartFrameExchange().

Referenced by ns3::HeFrameExchangeManager::StartFrameExchange().

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◆ TransmissionSucceeded()

void ns3::HtFrameExchangeManager::TransmissionSucceeded ( )

overrideprotectedvirtual

Take necessary actions upon a transmission success.

A non-QoS station transmits the next fragment, if any, or releases the channel, otherwise.

Reimplemented from ns3::FrameExchangeManager.

Definition at line 742 of file ht-frame-exchange-manager.cc.

References ns3::QosTxop::GetAccessCategory(), GetBar(), ns3::WifiPhy::GetSifs(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), ns3::QosFrameExchangeManager::m_edca, ns3::FrameExchangeManager::m_linkId, ns3::FrameExchangeManager::m_phy, NS_LOG_DEBUG, ns3::Simulator::Schedule(), ns3::Seconds(), ns3::FrameExchangeManager::StartTransmission(), and ns3::QosFrameExchangeManager::TransmissionSucceeded().

Referenced by ReceiveMpdu(), and SendPsdu().

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◆ TryAggregateMsdu()

bool ns3::HtFrameExchangeManager::TryAggregateMsdu	(	Ptr< const WifiMpdu >	msdu,
		WifiTxParameters &	txParams,
		Time	availableTime ) const

virtual

Check if aggregating an MSDU to the current MPDU (as specified by the given TX parameters) does not violate the size and time constraints, while taking into account the possibly updated protection and acknowledgment methods.

If size and time constraints are met, the TX parameters are modified with the updated protection and acknowledgment methods.

Parameters

msdu	the given MSDU
txParams	the TX parameters
availableTime	the constraint on the TX time of the PSDU, if different than Time::Min()

Returns: true if aggregating an MSDU to the current PSDU does not violate the size and time constraints

Definition at line 1210 of file ht-frame-exchange-manager.cc.

References ns3::WifiTxParameters::AggregateMsdu(), CalculateAcknowledgmentTime(), ns3::FrameExchangeManager::CalculateProtectionTime(), ns3::FrameExchangeManager::GetAckManager(), ns3::FrameExchangeManager::GetProtectionManager(), IsWithinLimitsIfAggregateMsdu(), ns3::WifiTxParameters::m_acknowledgment, ns3::WifiTxParameters::m_protection, ns3::WifiTxParameters::m_txDuration, ns3::Time::Min(), NS_ASSERT, NS_LOG_FUNCTION, ns3::WifiTxParameters::UndoAddMpdu(), and ns3::FrameExchangeManager::UpdateTxDuration().

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Friends And Related Symbol Documentation

◆ ::AmpduAggregationTest

friend class ::AmpduAggregationTest

friend

allow AmpduAggregationTest class access

Definition at line 35 of file ht-frame-exchange-manager.h.

Member Data Documentation

◆ m_mpduAggregator

Ptr<MpduAggregator> ns3::HtFrameExchangeManager::m_mpduAggregator

protected

A-MPDU aggregator.

Definition at line 350 of file ht-frame-exchange-manager.h.

Referenced by HtFrameExchangeManager(), DoDispose(), GetMpduAggregator(), IsWithinAmpduSizeLimit(), NeedSetupBlockAck(), SendDataFrame(), ns3::EhtFrameExchangeManager::SetLinkId(), and SetWifiMac().

◆ m_msduAggregator

Ptr<MsduAggregator> ns3::HtFrameExchangeManager::m_msduAggregator

protected

A-MSDU aggregator.

Definition at line 349 of file ht-frame-exchange-manager.h.

Referenced by HtFrameExchangeManager(), DoDispose(), GetMsduAggregator(), IsWithinLimitsIfAggregateMsdu(), ns3::EhtFrameExchangeManager::SetLinkId(), and SetWifiMac().

◆ m_pendingAddBaResp

std::map<AgreementKey, Ptr<WifiMpdu> > ns3::HtFrameExchangeManager::m_pendingAddBaResp

protected

pending ADDBA_RESPONSE frames indexed by agreement key

Definition at line 353 of file ht-frame-exchange-manager.h.

Referenced by DoDispose(), NotifyReceivedNormalAck(), and SendAddBaResponse().

◆ m_psdu

Ptr<WifiPsdu> ns3::HtFrameExchangeManager::m_psdu

private

the A-MPDU being transmitted

Definition at line 362 of file ht-frame-exchange-manager.h.

Referenced by BlockAckTimeout(), CtsTimeout(), DoDispose(), ProtectionCompleted(), ReceiveMpdu(), SendPsdu(), and SendPsduWithProtection().

◆ m_txParams

WifiTxParameters ns3::HtFrameExchangeManager::m_txParams

private

the TX parameters for the current frame

Definition at line 363 of file ht-frame-exchange-manager.h.

Referenced by DoDispose(), ReceiveMpdu(), SendPsdu(), and SendPsduWithProtection().

The documentation for this class was generated from the following files:

src/wifi/model/ht/ht-frame-exchange-manager.h
src/wifi/model/ht/ht-frame-exchange-manager.cc

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ AgreementKey

Constructor & Destructor Documentation

◆ HtFrameExchangeManager()

◆ ~HtFrameExchangeManager()

Member Function Documentation

◆ BlockAckTimeout()

◆ CalculateAcknowledgmentTime()

◆ CtsTimeout()

◆ DequeuePsdu()

◆ DoDispose()

◆ EndReceiveAmpdu()

◆ FinalizeMacHeader()

◆ ForwardMpduDown()

◆ ForwardPsduDown()

◆ GetBaManager()

◆ GetBar()

◆ GetMpduAggregator()

◆ GetMsduAggregator()

◆ GetPsduDurationId()

◆ GetTypeId()

◆ GetWifiPsdu()

◆ IsWithinAmpduSizeLimit()

◆ IsWithinLimitsIfAddMpdu()

◆ IsWithinLimitsIfAggregateMsdu()

◆ MissedBlockAck()

◆ NeedSetupBlockAck()

◆ NotifyPacketDiscarded()

◆ NotifyReceivedNormalAck()

◆ NotifyTxToEdca()

◆ ProtectionCompleted()

◆ ReceiveMgtAction()

◆ ReceiveMpdu()

◆ ReleaseSequenceNumbers()

◆ RetransmitMpduAfterMissedAck()

◆ SendAddBaRequest()

◆ SendAddBaResponse()

◆ SendBlockAck()

◆ SendDataFrame()

◆ SendDelbaFrame()

◆ SendMpduFromBaManager()

◆ SendPsdu()

◆ SendPsduWithProtection()

◆ SetWifiMac()

◆ StartFrameExchange()

◆ TransmissionSucceeded()

◆ TryAggregateMsdu()

Friends And Related Symbol Documentation

◆ ::AmpduAggregationTest

Member Data Documentation

◆ m_mpduAggregator

◆ m_msduAggregator

◆ m_pendingAddBaResp

◆ m_psdu

◆ m_txParams