QosFrameExchangeManager handles the frame exchange sequences for QoS stations. More...

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

Inheritance diagram for ns3::QosFrameExchangeManager:

Collaboration diagram for ns3::QosFrameExchangeManager:

Public Member Functions
	QosFrameExchangeManager ()

virtual	~QosFrameExchangeManager ()

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 parameters) without violating the given constraint on the PPDU transmission duration. More...

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. More...

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

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 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. More...

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

virtual	~FrameExchangeManager ()

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

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

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

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

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

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

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

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

void	NotifySwitchingStartNow (Time duration)

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 the reception of an A-MPDU is completed. More...

virtual void	ResetPhy (void)
	Remove WifiPhy associated with this MacLow. More...

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

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

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

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

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

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

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

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

void	SetPromisc (void)
	Enable promiscuous mode. More...

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

virtual void	SetWifiMac (const Ptr< RegularWifiMac > mac)
	Set the MAC layer to use. More...

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

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

virtual	~Object ()
	Destructor. More...

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

void	Dispose (void)
	Dispose of this Object. More...

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

virtual TypeId	GetInstanceTypeId (void) const
	Get the most derived TypeId for this Object. More...

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

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

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

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

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

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

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

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor. More...

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

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

void	Ref (void) const
	Increment the reference count. More...

void	Unref (void) const
	Decrement the reference count. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

Protected Member Functions
void	DoDispose () override
	Destructor implementation. More...

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. More...

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. More...

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. More...

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

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., setting the NAV or the TXOP holder). More...

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) More...

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

virtual void	SetTxopHolder (Ptr< const WifiPsdu > psdu, const WifiTxVector &txVector)
	Set the TXOP holder, if needed, based on the received frame. More...

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

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

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

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

Protected Member Functions inherited from ns3::FrameExchangeManager
virtual void	CtsTimeout (Ptr< WifiMacQueueItem > rts, const WifiTxVector &txVector)
	Called when the CTS timeout expires. More...

virtual void	DequeueMpdu (Ptr< WifiMacQueueItem > mpdu)
	Dequeue the given MPDU from the queue in which it is stored. More...

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

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

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

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

Ptr< WifiMacQueueItem >	GetNextFragment (void)
	Get the next fragment of the current MSDU. More...

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. More...

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

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

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

virtual void	NotifyReceivedNormalAck (Ptr< WifiMacQueueItem > mpdu)
	Notify other components that an MPDU was acknowledged. More...

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

virtual void	RetransmitMpduAfterMissedAck (Ptr< WifiMacQueueItem > mpdu) const
	Retransmit an MPDU that was not acknowledged. More...

virtual void	RetransmitMpduAfterMissedCts (Ptr< WifiMacQueueItem > mpdu) const
	Retransmit an MPDU that was not sent because a CTS was not received. More...

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

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

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

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

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

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

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. More...

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

virtual void	DoInitialize (void)
	Initialize() implementation. More...

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

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

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

Protected Attributes
Ptr< QosTxop >	m_edca
	the EDCAF that gained channel access More...

Mac48Address	m_txopHolder
	MAC address of the TXOP holder. More...

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

Mac48Address	m_bssid
	BSSID address (Mac48Address) More...

Ptr< ChannelAccessManager >	m_channelAccessManager
	the channel access manager More...

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

DroppedMpdu	m_droppedMpduCallback
	the dropped MPDU callback More...

Ptr< RegularWifiMac >	m_mac
	the MAC layer on this station More...

Time	m_navEnd
	NAV expiration time. More...

EventId	m_navResetEvent
	the event to reset the NAV after an RTS More...

Ptr< WifiPhy >	m_phy
	the PHY layer on this station More...

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

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

Mac48Address	m_self
	the MAC address of this device More...

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

WifiTxTimer	m_txTimer
	the timer set upon frame transmission More...

Private Member Functions
void	CancelPifsRecovery (void)
	Cancel the PIFS recovery event and have the EDCAF attempting PIFS recovery release the channel. More...

Private Attributes
Ptr< Txop >	m_edcaBackingOff
	channel access function that invoked backoff during TXOP More...

bool	m_initialFrame
	true if transmitting the initial frame of a TXOP More...

bool	m_pifsRecovery
	true if performing a PIFS recovery after failure More...

EventId	m_pifsRecoveryEvent
	event associated with an attempt of PIFS recovery More...

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

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

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

Detailed Description

QosFrameExchangeManager handles the frame exchange sequences for QoS stations.

Introspection did not find any typical Config paths.

Note that Basic Block Ack is not supported.

Attributes

PifsRecovery: Perform a PIFS recovery as a response to transmission failure within a TXOP
- Set with class: BooleanValue
- Underlying type: bool
- Initial value: true
- Flags: construct write read

No TraceSources are defined for this type.
Size of this type is 472 bytes (on a 64-bit architecture).

Definition at line 36 of file qos-frame-exchange-manager.h.

Constructor & Destructor Documentation

◆ QosFrameExchangeManager()

ns3::QosFrameExchangeManager::QosFrameExchangeManager ( )

Definition at line 54 of file qos-frame-exchange-manager.cc.

References NS_LOG_FUNCTION.

◆ ~QosFrameExchangeManager()

ns3::QosFrameExchangeManager::~QosFrameExchangeManager ( )

virtual

Definition at line 60 of file qos-frame-exchange-manager.cc.

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

◆ CancelPifsRecovery()

void ns3::QosFrameExchangeManager::CancelPifsRecovery ( void )

private

Cancel the PIFS recovery event and have the EDCAF attempting PIFS recovery release the channel.

Definition at line 133 of file qos-frame-exchange-manager.cc.

References ns3::EventId::Cancel(), ns3::EventId::IsRunning(), m_edca, m_pifsRecoveryEvent, ns3::QosTxop::NotifyChannelReleased(), NS_ASSERT, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartTransmission().

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◆ DoDispose()

void ns3::QosFrameExchangeManager::DoDispose ( void )

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 66 of file qos-frame-exchange-manager.cc.

References ns3::EventId::Cancel(), ns3::FrameExchangeManager::DoDispose(), m_edca, m_edcaBackingOff, m_pifsRecoveryEvent, and NS_LOG_FUNCTION.

Referenced by ns3::HtFrameExchangeManager::DoDispose().

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◆ GetCtsToSelfDurationId()

Time ns3::QosFrameExchangeManager::GetCtsToSelfDurationId	(	const WifiTxVector &	ctsTxVector,
		Time	txDuration,
		Time	response
	)		const

overrideprotectedvirtual

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.

Parameters

ctsTxVector	the TX vector used to send the CTS-to-self frame
txDuration	the TX duration of the data frame
response	the time taken by the response (acknowledgment) to the data frame

Returns: the computed Duration/ID value for the CTS-to-self frame

Reimplemented from ns3::FrameExchangeManager.

Definition at line 488 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::GetCtsSize(), ns3::FrameExchangeManager::GetCtsToSelfDurationId(), ns3::WifiPhy::GetPhyBand(), ns3::QosTxop::GetRemainingTxop(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), m_edca, ns3::FrameExchangeManager::m_phy, max, NS_LOG_FUNCTION, and ns3::Seconds().

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◆ GetFrameDurationId()

Time ns3::QosFrameExchangeManager::GetFrameDurationId	(	const WifiMacHeader &	header,
		uint32_t	size,
		const WifiTxParameters &	txParams,
		Ptr< Packet >	fragmentedPacket
	)		const

overrideprotectedvirtual

Compute how to set the Duration/ID field of a frame being transmitted with the given TX parameters.

Parameters

header	the MAC header of the frame
size	the size of the frame in bytes
txParams	the TX parameters used to send the frame
fragmentedPacket	the packet that originated the frame to transmit, in case the latter is a fragment

Returns: the computed Duration/ID value

Reimplemented from ns3::FrameExchangeManager.

Definition at line 436 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::FrameExchangeManager::GetFrameDurationId(), ns3::WifiPhy::GetPhyBand(), ns3::QosTxop::GetRemainingTxop(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), m_edca, ns3::FrameExchangeManager::m_phy, ns3::WifiTxParameters::m_txVector, max, NS_LOG_FUNCTION, and ns3::Seconds().

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◆ GetRtsDurationId()

Time ns3::QosFrameExchangeManager::GetRtsDurationId	(	const WifiTxVector &	rtsTxVector,
		Time	txDuration,
		Time	response
	)		const

overrideprotectedvirtual

Compute how to set the Duration/ID field of an RTS frame to send to protect a frame transmitted with the given TX vector.

Parameters

rtsTxVector	the TX vector used to send the RTS frame
txDuration	the TX duration of the data frame
response	the time taken by the response (acknowledgment) to the data frame

Returns: the computed Duration/ID value for the RTS frame

Reimplemented from ns3::FrameExchangeManager.

Definition at line 463 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::WifiPhy::GetPhyBand(), ns3::QosTxop::GetRemainingTxop(), ns3::FrameExchangeManager::GetRtsDurationId(), ns3::GetRtsSize(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), m_edca, ns3::FrameExchangeManager::m_phy, max, NS_LOG_FUNCTION, and ns3::Seconds().

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◆ GetTypeId()

TypeId ns3::QosFrameExchangeManager::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 38 of file qos-frame-exchange-manager.cc.

References m_pifsRecovery, ns3::MakeBooleanAccessor(), ns3::MakeBooleanChecker(), and ns3::TypeId::SetParent().

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◆ IsWithinLimitsIfAddMpdu()

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

virtual

Check whether the given MPDU can be added to the frame being built (as described by the given TX parameters) without violating the given constraint on the PPDU transmission duration.

Parameters

mpdu	the MPDU to add to the frame being built
txParams	the TX parameters describing the frame being built
ppduDurationLimit	the time limit on the PPDU transmission duration

Returns: true if the given MPDU can be added to the frame being built

Reimplemented in ns3::HtFrameExchangeManager.

Definition at line 387 of file qos-frame-exchange-manager.cc.

References IsWithinSizeAndTimeLimits(), NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by TryAddMpdu().

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◆ IsWithinSizeAndTimeLimits()

bool ns3::QosFrameExchangeManager::IsWithinSizeAndTimeLimits	(	uint32_t	ppduPayloadSize,
		Mac48Address	receiver,
		const WifiTxParameters &	txParams,
		Time	ppduDurationLimit
	)		const

virtual

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.

Also check that the PSDU size does not exceed the max PSDU size for the modulation class being used.

Parameters

ppduPayloadSize	the new PSDU size
receiver	the MAC address of the receiver of the PSDU
txParams	the TX parameters describing the frame being built
ppduDurationLimit	the limit on the PPDU duration

Returns: true if the constraints on the PPDU duration limit and the maximum PSDU size are met

Definition at line 401 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::GetMaxPsduSize(), ns3::WifiTxVector::GetModulationClass(), ns3::GetPpduMaxTime(), ns3::WifiTxVector::GetPreambleType(), ns3::FrameExchangeManager::GetTxDuration(), ns3::Time::IsNegative(), ns3::Time::IsStrictlyPositive(), ns3::WifiTxParameters::m_txVector, ns3::Time::Min(), ns3::Time::MS, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by IsWithinLimitsIfAddMpdu(), ns3::HtFrameExchangeManager::IsWithinLimitsIfAddMpdu(), and ns3::HtFrameExchangeManager::IsWithinLimitsIfAggregateMsdu().

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◆ PifsRecovery()

void ns3::QosFrameExchangeManager::PifsRecovery ( void )

protected

Perform a PIFS recovery as a response to transmission failure within a TXOP.

If the carrier sense indicates that the medium is idle, continue the TXOP. Otherwise, release the channel.

Definition at line 112 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::GetPifs(), ns3::WifiPhy::GetSifs(), ns3::QosTxop::IsTxopStarted(), ns3::FrameExchangeManager::m_channelAccessManager, m_edca, ns3::FrameExchangeManager::m_phy, ns3::QosTxop::NotifyChannelReleased(), ns3::Simulator::Now(), NS_ASSERT, NS_LOG_FUNCTION, ns3::Seconds(), and StartTransmission().

Referenced by TransmissionFailed().

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◆ PreProcessFrame()

void ns3::QosFrameExchangeManager::PreProcessFrame	(	Ptr< const WifiPsdu >	psdu,
		const WifiTxVector &	txVector
	)

overrideprotectedvirtual

Perform actions that are possibly needed when receiving any frame, independently of whether the frame is addressed to this station (e.g., setting the NAV or the TXOP holder).

Parameters

psdu	the received PSDU
txVector	TX vector of the received PSDU

Reimplemented from ns3::FrameExchangeManager.

Definition at line 593 of file qos-frame-exchange-manager.cc.

References ns3::AP, ns3::WifiPsdu::GetAddr1(), ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetQosQueueSize(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsQosEosp(), ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_self, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::PeekPointer(), ns3::FrameExchangeManager::PreProcessFrame(), and SetTxopHolder().

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◆ ReceiveMpdu()

void ns3::QosFrameExchangeManager::ReceiveMpdu	(	Ptr< WifiMacQueueItem >	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 636 of file qos-frame-exchange-manager.cc.

Referenced by ns3::HtFrameExchangeManager::ReceiveMpdu().

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◆ SendCfEndIfNeeded()

bool ns3::QosFrameExchangeManager::SendCfEndIfNeeded ( void )

protectedvirtual

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

Returns: true if a CF-End frame was sent, false otherwise

Definition at line 76 of file qos-frame-exchange-manager.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::Mac48Address::GetBroadcast(), ns3::WifiPhy::GetPhyBand(), ns3::QosTxop::GetRemainingTxop(), ns3::Txop::GetTxopLimit(), ns3::Time::IsStrictlyPositive(), m_edca, ns3::FrameExchangeManager::m_mac, ns3::FrameExchangeManager::m_phy, ns3::FrameExchangeManager::m_self, ns3::QosTxop::NotifyChannelReleased(), ns3::Txop::NotifyChannelReleased(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), ns3::Seconds(), ns3::WifiPhy::Send(), ns3::WifiMacHeader::SetType(), ns3::WIFI_MAC_CTL_END, and ns3::WIFI_MAC_FCS_LENGTH.

Referenced by StartTransmission().

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◆ SetTxopHolder()

void ns3::QosFrameExchangeManager::SetTxopHolder	(	Ptr< const WifiPsdu >	psdu,
		const WifiTxVector &	txVector
	)

protectedvirtual

Set the TXOP holder, if needed, based on the received frame.

Parameters

psdu	the received PSDU
txVector	TX vector of the received PSDU

Definition at line 619 of file qos-frame-exchange-manager.cc.

References ns3::WifiPsdu::GetAddr1(), ns3::WifiPsdu::GetAddr2(), ns3::WifiPsdu::GetHeader(), ns3::WifiMacHeader::IsAck(), ns3::WifiMacHeader::IsCts(), ns3::WifiMacHeader::IsMgt(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsRts(), m_txopHolder, and NS_LOG_FUNCTION.

Referenced by PreProcessFrame().

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◆ StartFrameExchange()

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

protectedvirtual

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 in ns3::HeFrameExchangeManager, and ns3::HtFrameExchangeManager.

Definition at line 256 of file qos-frame-exchange-manager.cc.

References ns3::FrameExchangeManager::GetFirstFragmentIfNeeded(), ns3::WifiMacQueueItem::GetHeader(), ns3::QosTxop::GetNextMpdu(), ns3::FrameExchangeManager::GetProtectionManager(), ns3::WifiMacHeader::IsQosAmsdu(), ns3::WifiMacHeader::IsQosData(), ns3::FrameExchangeManager::m_mac, ns3::WifiTxParameters::m_protection, ns3::WifiTxParameters::m_txVector, NS_ASSERT, NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosTxop::PeekNextMpdu(), and ns3::FrameExchangeManager::SendMpduWithProtection().

Referenced by ns3::HtFrameExchangeManager::StartFrameExchange(), and StartTransmission().

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◆ StartTransmission() [1/2]

bool ns3::QosFrameExchangeManager::StartTransmission ( Ptr< Txop > dcf )

overridevirtual

Request the FrameExchangeManager to start a frame exchange sequence.

Parameters

dcf	the channel access function that gained channel access. It is the DCF on non-QoS stations and an EDCA on QoS stations.

Returns: true if a frame exchange sequence was started, false otherwise

Reimplemented from ns3::FrameExchangeManager.

Definition at line 145 of file qos-frame-exchange-manager.cc.

References CancelPifsRecovery(), ns3::Txop::GetTxopLimit(), ns3::Txop::IsQosTxop(), ns3::EventId::IsRunning(), m_edca, m_pifsRecoveryEvent, NS_LOG_FUNCTION, and ns3::FrameExchangeManager::StartTransmission().

Referenced by PifsRecovery(), TransmissionSucceeded(), and ns3::HtFrameExchangeManager::TransmissionSucceeded().

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◆ StartTransmission() [2/2]

bool ns3::QosFrameExchangeManager::StartTransmission	(	Ptr< QosTxop >	edca,
		Time	txopDuration
	)

protectedvirtual

Request the FrameExchangeManager to start a frame exchange sequence.

Parameters

edca	the EDCA that gained channel access
txopDuration	the duration of a TXOP. This value is only used when a new TXOP is started (and hence the TXOP limit for the given EDCAF is non-zero)

Returns: true if a frame exchange sequence was started, false otherwise

Definition at line 168 of file qos-frame-exchange-manager.cc.

References ns3::WifiTxTimer::Cancel(), CancelPifsRecovery(), ns3::QosTxop::GetRemainingTxop(), ns3::Txop::GetTxopLimit(), ns3::EventId::IsRunning(), ns3::WifiTxTimer::IsRunning(), ns3::Time::IsStrictlyPositive(), ns3::QosTxop::IsTxopStarted(), ns3::Time::IsZero(), ns3::FrameExchangeManager::m_dcf, m_edca, m_edcaBackingOff, m_initialFrame, m_pifsRecovery, m_pifsRecoveryEvent, ns3::FrameExchangeManager::m_txTimer, ns3::Time::Min(), ns3::QosTxop::NotifyChannelAccessed(), ns3::QosTxop::NotifyChannelReleased(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Seconds(), SendCfEndIfNeeded(), and StartFrameExchange().

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◆ TransmissionFailed()

void ns3::QosFrameExchangeManager::TransmissionFailed ( void )

overrideprotectedvirtual

Take necessary actions upon a transmission failure.

A non-QoS station releases the channel when this method is called.

Reimplemented from ns3::FrameExchangeManager.

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

References ns3::WifiPhy::GetPifs(), ns3::Txop::GetTxopLimit(), ns3::EventId::IsRunning(), ns3::Time::IsStrictlyPositive(), m_edca, m_edcaBackingOff, m_initialFrame, ns3::FrameExchangeManager::m_phy, m_pifsRecovery, m_pifsRecoveryEvent, ns3::QosTxop::NotifyChannelReleased(), NS_ASSERT, NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, PifsRecovery(), ns3::Simulator::Schedule(), and ns3::FrameExchangeManager::TransmissionFailed().

Referenced by ns3::HtFrameExchangeManager::BlockAckTimeout(), and ns3::HtFrameExchangeManager::CtsTimeout().

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◆ TransmissionSucceeded()

void ns3::QosFrameExchangeManager::TransmissionSucceeded ( void )

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 514 of file qos-frame-exchange-manager.cc.

References ns3::QosTxop::GetRemainingTxop(), ns3::WifiPhy::GetSifs(), ns3::Txop::GetTxopLimit(), ns3::Time::IsStrictlyPositive(), m_edca, m_initialFrame, ns3::FrameExchangeManager::m_phy, ns3::QosTxop::NotifyChannelReleased(), NS_LOG_DEBUG, ns3::Simulator::Schedule(), ns3::Seconds(), StartTransmission(), and ns3::FrameExchangeManager::TransmissionSucceeded().

Referenced by ns3::HtFrameExchangeManager::TransmissionSucceeded().

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◆ TryAddMpdu()

bool ns3::QosFrameExchangeManager::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 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.

The protection and acknowledgment methods held by the given TX parameters are only updated if the given MPDU can be added.

Parameters

mpdu	the MPDU to add to the frame being built
txParams	the TX parameters describing the frame being built
availableTime	the time limit on the frame exchange sequence