Manages all block ack agreements for an originator station. More...

#include "block-ack-manager.h"

Inheritance diagram for ns3::BlockAckManager:

Collaboration diagram for ns3::BlockAckManager:

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

typedef void(*	AgreementStateTracedCallback) (Time now, const Mac48Address &recipient, uint8_t tid, OriginatorBlockAckAgreement::State state)
	TracedCallback signature for state changes.

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

using	OriginatorAgreementOptConstRef
	optional const reference to OriginatorBlockAckAgreement

using	RecipientAgreementOptConstRef
	optional const reference to RecipientBlockAckAgreement

typedef Callback< void, Ptr< const WifiMpdu > >	TxFailed
	typedef for a callback to invoke when an MPDU is negatively ack'ed.

typedef Callback< void, Ptr< const WifiMpdu > >	TxOk
	typedef for a callback to invoke when an MPDU is successfully ack'ed.

Public Member Functions
	BlockAckManager ()

	BlockAckManager (const BlockAckManager &)=delete

	~BlockAckManager () override

void	AddToSendBarIfDataQueuedList (const Mac48Address &recipient, uint8_t tid)
	Add the given (recipient, TID) pair to the list of BA agreements for which a BAR shall only be sent if there are queued data frames belonging to those agreements.

void	CreateOriginatorAgreement (const MgtAddBaRequestHeader &reqHdr, const Mac48Address &recipient)

void	CreateRecipientAgreement (const MgtAddBaResponseHeader &respHdr, const Mac48Address &originator, uint16_t startingSeq, Ptr< MacRxMiddle > rxMiddle)

void	DestroyOriginatorAgreement (const Mac48Address &recipient, uint8_t tid)

void	DestroyRecipientAgreement (const Mac48Address &originator, uint8_t tid)
	Destroy a recipient Block Ack agreement.

OriginatorAgreementOptConstRef	GetAgreementAsOriginator (const Mac48Address &recipient, uint8_t tid) const

RecipientAgreementOptConstRef	GetAgreementAsRecipient (const Mac48Address &originator, uint8_t tid) const

CtrlBAckRequestHeader	GetBlockAckReqHeader (const Mac48Address &recipient, uint8_t tid) const

uint32_t	GetNBufferedPackets (const Mac48Address &recipient, uint8_t tid) const

uint16_t	GetOriginatorStartingSequence (const Mac48Address &recipient, uint8_t tid) const
	This function returns the starting sequence number of the transmit window.

uint16_t	GetRecipientBufferSize (const Mac48Address &recipient, uint8_t tid) const
	This function returns the buffer size negotiated with the recipient.

const std::list< AgreementKey > &	GetSendBarIfDataQueuedList () const

bool	NeedBarRetransmission (uint8_t tid, const Mac48Address &recipient)
	This function returns true if a block ack agreement is established with the given recipient for the given TID and there is at least an outstanding MPDU for such agreement whose lifetime is not expired.

void	NotifyDiscardedMpdu (Ptr< const WifiMpdu > mpdu)

void	NotifyGotAck (uint8_t linkId, Ptr< const WifiMpdu > mpdu)
	Invoked upon receipt of an Ack frame on the given link after the transmission of a QoS data frame sent under an established block ack agreement.

std::pair< uint16_t, uint16_t >	NotifyGotBlockAck (uint8_t linkId, const CtrlBAckResponseHeader &blockAck, const Mac48Address &recipient, const std::set< uint8_t > &tids, size_t index=0)

void	NotifyGotBlockAckRequest (const Mac48Address &originator, uint8_t tid, uint16_t startingSeq)

void	NotifyGotMpdu (Ptr< const WifiMpdu > mpdu)

void	NotifyMissedAck (uint8_t linkId, Ptr< WifiMpdu > mpdu)
	Invoked upon missed reception of an Ack frame on the given link after the transmission of a QoS data frame sent under an established block ack agreement.

void	NotifyMissedBlockAck (uint8_t linkId, const Mac48Address &recipient, uint8_t tid)

void	NotifyOriginatorAgreementEstablished (const Mac48Address &recipient, uint8_t tid, uint16_t startingSeq)

void	NotifyOriginatorAgreementNoReply (const Mac48Address &recipient, uint8_t tid)

void	NotifyOriginatorAgreementRejected (const Mac48Address &recipient, uint8_t tid)

void	NotifyOriginatorAgreementReset (const Mac48Address &recipient, uint8_t tid)

BlockAckManager &	operator= (const BlockAckManager &)=delete

void	RemoveFromSendBarIfDataQueuedList (const Mac48Address &recipient, uint8_t tid)
	Remove the given (recipient, TID) pair from the list of BA agreements for which a BAR shall only be sent if there are queued data frames belonging to those agreements.

void	ScheduleBar (const CtrlBAckRequestHeader &reqHdr, const WifiMacHeader &hdr)

void	SetBlockAckInactivityCallback (Callback< void, Mac48Address, uint8_t, bool > callback)
	Set block ack inactivity callback.

void	SetBlockAckThreshold (uint8_t nPackets)

void	SetBlockDestinationCallback (Callback< void, Mac48Address, uint8_t > callback)
	Set block destination callback.

void	SetDroppedOldMpduCallback (DroppedOldMpdu callback)

void	SetQueue (const Ptr< WifiMacQueue > queue)

void	SetTxFailedCallback (TxFailed callback)

void	SetTxOkCallback (TxOk callback)

void	SetUnblockDestinationCallback (Callback< void, Mac48Address, uint8_t > callback)
	Set unblock destination callback.

void	StorePacket (Ptr< WifiMpdu > mpdu)

void	UpdateOriginatorAgreement (const MgtAddBaResponseHeader &respHdr, const Mac48Address &recipient, uint16_t startingSeq)

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::Object
static TypeId	GetTypeId ()
	Register this type.

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

Protected Member Functions
void	DoDispose () override
	Destructor implementation.

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.

Private Types
enum	MpduStatus : uint8_t { STAY_INFLIGHT = 0 , TO_RETRANSMIT , ACKNOWLEDGED }
	Enumeration for the statuses of a buffered MPDU. More...

using	OriginatorAgreements
	AgreementKey-indexed map of originator block ack agreements.

using	OriginatorAgreementsI = OriginatorAgreements::iterator
	typedef for an iterator for Agreements

typedef std::list< Ptr< WifiMpdu > >	PacketQueue
	typedef for a list of WifiMpdu.

typedef std::list< Ptr< WifiMpdu > >::iterator	PacketQueueI
	typedef for an iterator for PacketQueue.

using	RecipientAgreements = std::map<AgreementKey, RecipientBlockAckAgreement>
	AgreementKey-indexed map of recipient block ack agreements.

Private Member Functions
PacketQueueI	HandleInFlightMpdu (uint8_t linkId, PacketQueueI mpduIt, MpduStatus status, const OriginatorAgreementsI &it, const Time &now)
	Handle the given in flight MPDU based on its given status.

void	InactivityTimeout (const Mac48Address &recipient, uint8_t tid)
	Inactivity timeout function.

Private Attributes
Callback< void, Mac48Address, uint8_t, bool >	m_blockAckInactivityTimeout
	BlockAck inactivity timeout callback.

uint8_t	m_blockAckThreshold
	block ack threshold

Callback< void, Mac48Address, uint8_t >	m_blockPackets
	block packets callback

DroppedOldMpdu	m_droppedOldMpduCallback
	the dropped MPDU callback

OriginatorAgreements	m_originatorAgreements
	This data structure contains, for each originator block ack agreement (recipient, TID), a set of packets for which an ack by block ack is requested.

TracedCallback< Time, Mac48Address, uint8_t, OriginatorBlockAckAgreement::State >	m_originatorAgreementState
	The trace source fired when a state transition occurred.

Ptr< WifiMacQueue >	m_queue
	queue

RecipientAgreements	m_recipientAgreements
	Recipient Block Ack agreements.

std::list< AgreementKey >	m_sendBarIfDataQueued
	list of BA agreements for which a BAR shall only be sent if data is queued

TxFailed	m_txFailedCallback
	transmit failed callback

TxOk	m_txOkCallback
	transmit OK callback

Callback< void, Mac48Address, uint8_t >	m_unblockPackets
	unblock packets callback

Additional Inherited Members
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

Manages all block ack agreements for an originator station.

Definition at line 40 of file block-ack-manager.h.

Member Typedef Documentation

◆ AgreementKey

using ns3::BlockAckManager::AgreementKey = std::pair<Mac48Address, uint8_t>

agreement key typedef (MAC address and TID)

Definition at line 408 of file block-ack-manager.h.

◆ AgreementStateTracedCallback

typedef void(* ns3::BlockAckManager::AgreementStateTracedCallback) (Time now, const Mac48Address &recipient, uint8_t tid, OriginatorBlockAckAgreement::State state)

TracedCallback signature for state changes.

Parameters

[in]	now	Time when the state changed.
[in]	recipient	MAC address of the recipient.
[in]	tid	the TID.
[in]	state	The state.

Definition at line 369 of file block-ack-manager.h.

◆ DroppedOldMpdu

typedef Callback<void, Ptr<const WifiMpdu> > ns3::BlockAckManager::DroppedOldMpdu

typedef for a callback to invoke when an MPDU is dropped.

Definition at line 344 of file block-ack-manager.h.

◆ OriginatorAgreementOptConstRef

using ns3::BlockAckManager::OriginatorAgreementOptConstRef

Initial value:

std::optional<std::reference_wrapper<const OriginatorBlockAckAgreement>>

optional const reference to OriginatorBlockAckAgreement

Definition at line 68 of file block-ack-manager.h.

◆ OriginatorAgreements

using ns3::BlockAckManager::OriginatorAgreements

private

Initial value:

std::map<AgreementKey, std::pair<OriginatorBlockAckAgreement, PacketQueue>>

AgreementKey-indexed map of originator block ack agreements.

Definition at line 453 of file block-ack-manager.h.

◆ OriginatorAgreementsI

using ns3::BlockAckManager::OriginatorAgreementsI = OriginatorAgreements::iterator

private

typedef for an iterator for Agreements

Definition at line 456 of file block-ack-manager.h.

◆ PacketQueue

typedef std::list<Ptr<WifiMpdu> > ns3::BlockAckManager::PacketQueue

private

typedef for a list of WifiMpdu.

Definition at line 446 of file block-ack-manager.h.

◆ PacketQueueI

typedef std::list<Ptr<WifiMpdu>>::iterator ns3::BlockAckManager::PacketQueueI

private

typedef for an iterator for PacketQueue.

Definition at line 450 of file block-ack-manager.h.

◆ RecipientAgreementOptConstRef

using ns3::BlockAckManager::RecipientAgreementOptConstRef

Initial value:

std::optional<std::reference_wrapper<const RecipientBlockAckAgreement>>

optional const reference to RecipientBlockAckAgreement

Definition at line 71 of file block-ack-manager.h.

◆ RecipientAgreements

using ns3::BlockAckManager::RecipientAgreements = std::map<AgreementKey, RecipientBlockAckAgreement>

private

AgreementKey-indexed map of recipient block ack agreements.

Definition at line 459 of file block-ack-manager.h.

◆ TxFailed

typedef Callback<void, Ptr<const WifiMpdu> > ns3::BlockAckManager::TxFailed

typedef for a callback to invoke when an MPDU is negatively ack'ed.

Definition at line 340 of file block-ack-manager.h.

◆ TxOk

typedef Callback<void, Ptr<const WifiMpdu> > ns3::BlockAckManager::TxOk

typedef for a callback to invoke when an MPDU is successfully ack'ed.

Definition at line 336 of file block-ack-manager.h.

Member Enumeration Documentation

◆ MpduStatus

enum ns3::BlockAckManager::MpduStatus : uint8_t

private

Enumeration for the statuses of a buffered MPDU.

Enumerator
STAY_INFLIGHT
TO_RETRANSMIT
ACKNOWLEDGED

Definition at line 46 of file block-ack-manager.h.

Constructor & Destructor Documentation

◆ BlockAckManager() [1/2]

ns3::BlockAckManager::BlockAckManager ( )

Definition at line 47 of file block-ack-manager.cc.

References NS_LOG_FUNCTION.

◆ ~BlockAckManager()

ns3::BlockAckManager::~BlockAckManager ( )

override

Definition at line 52 of file block-ack-manager.cc.

References NS_LOG_FUNCTION.

◆ BlockAckManager() [2/2]

ns3::BlockAckManager::BlockAckManager ( const BlockAckManager & )

delete

Member Function Documentation

◆ AddToSendBarIfDataQueuedList()

void ns3::BlockAckManager::AddToSendBarIfDataQueuedList	(	const Mac48Address &	recipient,
		uint8_t	tid )

Add the given (recipient, TID) pair to the list of BA agreements for which a BAR shall only be sent if there are queued data frames belonging to those agreements.

Parameters

recipient	the recipient
tid	the TID

Definition at line 687 of file block-ack-manager.cc.

References m_sendBarIfDataQueued, and NS_LOG_FUNCTION.

◆ CreateOriginatorAgreement()

void ns3::BlockAckManager::CreateOriginatorAgreement	(	const MgtAddBaRequestHeader &	reqHdr,
		const Mac48Address &	recipient )

Parameters

reqHdr	Relative Add block ack request (action frame).
recipient	Address of peer station involved in block ack mechanism.

Creates a new originator block ack agreement in pending state. When a ADDBA response with a successful status code is received, the relative agreement becomes established.

Definition at line 90 of file block-ack-manager.cc.

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◆ CreateRecipientAgreement()

void ns3::BlockAckManager::CreateRecipientAgreement	(	const MgtAddBaResponseHeader &	respHdr,
		const Mac48Address &	originator,
		uint16_t	startingSeq,
		Ptr< MacRxMiddle >	rxMiddle )

Parameters

respHdr	Add block ack response from originator (action frame).
originator	Address of peer station involved in block ack mechanism.
startingSeq	Sequence number of the first MPDU of all packets for which block ack was negotiated.
rxMiddle	the MAC RX Middle on this station

This function is typically invoked only by ns3::WifiMac when the STA (which may be non-AP in ESS, or in an IBSS) has received an ADDBA Request frame and is transmitting an ADDBA Response frame. At this point the frame exchange manager must allocate buffers to collect all correctly received packets belonging to the category for which block ack was negotiated.

Definition at line 184 of file block-ack-manager.cc.

References ns3::MgtAddBaResponseHeader::GetBufferSize(), ns3::MgtAddBaResponseHeader::GetTid(), ns3::MgtAddBaResponseHeader::GetTimeout(), ns3::MgtAddBaResponseHeader::IsAmsduSupported(), ns3::MgtAddBaResponseHeader::IsImmediateBlockAck(), m_recipientAgreements, NS_LOG_FUNCTION, ns3::BlockAckAgreement::SetDelayedBlockAck(), ns3::BlockAckAgreement::SetImmediateBlockAck(), and ns3::RecipientBlockAckAgreement::SetMacRxMiddle().

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◆ DestroyOriginatorAgreement()

void ns3::BlockAckManager::DestroyOriginatorAgreement	(	const Mac48Address &	recipient,
		uint8_t	tid )

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	traffic ID of transmitted packet.

Invoked when a recipient reject a block ack agreement or when a DELBA frame is Received/Transmitted.

Definition at line 128 of file block-ack-manager.cc.

References m_originatorAgreements, and NS_LOG_FUNCTION.

◆ DestroyRecipientAgreement()

void ns3::BlockAckManager::DestroyRecipientAgreement	(	const Mac48Address &	originator,
		uint8_t	tid )

Destroy a recipient Block Ack agreement.

Parameters

originator	the originator MAC address
tid	the TID associated with the Block Ack agreement

Definition at line 214 of file block-ack-manager.cc.

References m_recipientAgreements, and NS_LOG_FUNCTION.

◆ DoDispose()

void ns3::BlockAckManager::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::Object.

Definition at line 58 of file block-ack-manager.cc.

References m_originatorAgreements, m_queue, and NS_LOG_FUNCTION.

◆ GetAgreementAsOriginator()

BlockAckManager::OriginatorAgreementOptConstRef ns3::BlockAckManager::GetAgreementAsOriginator	(	const Mac48Address &	recipient,
		uint8_t	tid ) const

Parameters

recipient	MAC address of the recipient
tid	Traffic ID

Returns: a const reference to the block ack agreement with the given recipient, if it exists

Check if we are the originator of an existing block ack agreement with the given recipient.

Definition at line 66 of file block-ack-manager.cc.

References m_originatorAgreements, and NS_LOG_FUNCTION.

Referenced by CreateOriginatorAgreement().

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◆ GetAgreementAsRecipient()

BlockAckManager::RecipientAgreementOptConstRef ns3::BlockAckManager::GetAgreementAsRecipient	(	const Mac48Address &	originator,
		uint8_t	tid ) const

Parameters

originator	MAC address of the originator
tid	Traffic ID

Returns: a const reference to the block ack agreement with the given originator, if it exists

Check if we are the recipient of an existing block ack agreement with the given originator.

Definition at line 78 of file block-ack-manager.cc.

References m_recipientAgreements, and NS_LOG_FUNCTION.

◆ GetBlockAckReqHeader()

CtrlBAckRequestHeader ns3::BlockAckManager::GetBlockAckReqHeader	(	const Mac48Address &	recipient,
		uint8_t	tid ) const

Parameters

recipient	the recipient
tid	the TID

Returns: the BlockAckRequest header for the established BA agreement

Get the BlockAckRequest header for the established BA agreement (recipient,tid).

Definition at line 635 of file block-ack-manager.cc.

References m_originatorAgreements, NS_ASSERT, NS_LOG_FUNCTION, ns3::CtrlBAckRequestHeader::SetStartingSequence(), ns3::CtrlBAckRequestHeader::SetTidInfo(), and ns3::CtrlBAckRequestHeader::SetType().

Referenced by NotifyDiscardedMpdu().

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◆ GetNBufferedPackets()

uint32_t ns3::BlockAckManager::GetNBufferedPackets	(	const Mac48Address &	recipient,
		uint8_t	tid ) const

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	Traffic ID.

Returns: the number of packets buffered for a specified agreement

Returns the number of packets buffered for a specified agreement. This methods doesn't return the number of buffered MPDUs but the number of buffered MSDUs.

Definition at line 275 of file block-ack-manager.cc.

References m_originatorAgreements, and NS_LOG_FUNCTION.

◆ GetOriginatorStartingSequence()

uint16_t ns3::BlockAckManager::GetOriginatorStartingSequence	(	const Mac48Address &	recipient,
		uint8_t	tid ) const

This function returns the starting sequence number of the transmit window.

Parameters

tid	Traffic ID
recipient	MAC address of the recipient

Returns: the starting sequence number of the transmit window (WinStartO)

Definition at line 870 of file block-ack-manager.cc.

References m_originatorAgreements.

◆ GetRecipientBufferSize()

uint16_t ns3::BlockAckManager::GetRecipientBufferSize	(	const Mac48Address &	recipient,
		uint8_t	tid ) const

This function returns the buffer size negotiated with the recipient.

Parameters

tid	Traffic ID
recipient	MAC address of the recipient

Returns: the buffer size negotiated with the recipient

Definition at line 858 of file block-ack-manager.cc.

References m_originatorAgreements.

◆ GetSendBarIfDataQueuedList()

const std::list< BlockAckManager::AgreementKey > & ns3::BlockAckManager::GetSendBarIfDataQueuedList ( ) const

Returns: the list of BA agreements (identified by the recipient and TID pair) for which a BAR shall only be sent if there are queued data frames belonging to those agreements

Definition at line 681 of file block-ack-manager.cc.

References m_sendBarIfDataQueued.

◆ GetTypeId()

TypeId ns3::BlockAckManager::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 33 of file block-ack-manager.cc.

References m_originatorAgreementState, ns3::MakeTraceSourceAccessor(), and ns3::TypeId::SetParent().

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◆ HandleInFlightMpdu()

BlockAckManager::PacketQueueI ns3::BlockAckManager::HandleInFlightMpdu	(	uint8_t	linkId,
		PacketQueueI	mpduIt,
		MpduStatus	status,
		const OriginatorAgreementsI &	it,
		const Time &	now )

private

Handle the given in flight MPDU based on its given status.

If the status is ACKNOWLEDGED, the MPDU is removed from both the EDCA queue and the queue of in flight MPDUs. If the status is TO_RETRANSMIT, the MPDU is only removed from the queue of in flight MPDUs. Note that the MPDU is removed from both queues (independently of the status) if the MPDU is not stored in the EDCA queue, is an old packet or its lifetime expired.

Parameters

linkId	the ID of the link on which the MPDU has been transmitted
mpduIt	an iterator pointing to the MPDU in the queue of in flight MPDUs
status	the status of the in flight MPDU
it	iterator pointing to the Block Ack agreement
now	the current time

Returns: an iterator pointing to the next MPDU in the queue of in flight MPDUs

Definition at line 294 of file block-ack-manager.cc.

References ACKNOWLEDGED, ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::Callback< R, UArgs >::IsNull(), ns3::WifiMacHeader::IsQosData(), m_droppedOldMpduCallback, m_queue, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::SEQNO_SPACE_HALF_SIZE, STAY_INFLIGHT, and TO_RETRANSMIT.

Referenced by NeedBarRetransmission(), NotifyGotAck(), NotifyGotBlockAck(), NotifyMissedAck(), and NotifyMissedBlockAck().

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◆ InactivityTimeout()

void ns3::BlockAckManager::InactivityTimeout	(	const Mac48Address &	recipient,
		uint8_t	tid )

private

Inactivity timeout function.

Parameters

recipient	the recipient MAC address
tid	Traffic ID

Definition at line 707 of file block-ack-manager.cc.

References m_blockAckInactivityTimeout, and NS_LOG_FUNCTION.

Referenced by NotifyGotBlockAck(), and UpdateOriginatorAgreement().

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◆ NeedBarRetransmission()

bool ns3::BlockAckManager::NeedBarRetransmission	(	uint8_t	tid,
		const Mac48Address &	recipient )

This function returns true if a block ack agreement is established with the given recipient for the given TID and there is at least an outstanding MPDU for such agreement whose lifetime is not expired.

Parameters

tid	Traffic ID
recipient	MAC address of the recipient

Returns: true if BAR retransmission needed

Definition at line 790 of file block-ack-manager.cc.

References HandleInFlightMpdu(), m_originatorAgreements, ns3::Simulator::Now(), ns3::SINGLE_LINK_OP_ID, and STAY_INFLIGHT.

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◆ NotifyDiscardedMpdu()

void ns3::BlockAckManager::NotifyDiscardedMpdu ( Ptr< const WifiMpdu > mpdu )

Parameters

mpdu	the discarded frame

Notify the block ack manager that an MPDU has been discarded, e.g., because the MSDU lifetime expired. If there is an established block ack agreement, make the transmit window advance beyond the discarded frame. This also involves (i) the removal of frames that consequently become old from the retransmit queue and from the queue of the block ack agreement, and (ii) the scheduling of a BlockAckRequest.

Definition at line 532 of file block-ack-manager.cc.

References GetBlockAckReqHeader(), ns3::Callback< R, UArgs >::IsNull(), m_droppedOldMpduCallback, m_originatorAgreements, m_queue, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosUtilsIsOldPacket(), ScheduleBar(), ns3::SEQNO_SPACE_HALF_SIZE, ns3::WifiMacHeader::SetAddr1(), ns3::WifiMacHeader::SetAddr2(), ns3::WifiMacHeader::SetDsNotFrom(), ns3::WifiMacHeader::SetDsNotTo(), ns3::WifiMacHeader::SetNoMoreFragments(), ns3::WifiMacHeader::SetNoRetry(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_BACKREQ.

Referenced by ns3::QosTxop::CreateQueue().

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◆ NotifyGotAck()

void ns3::BlockAckManager::NotifyGotAck	(	uint8_t	linkId,
		Ptr< const WifiMpdu >	mpdu )

Invoked upon receipt of an Ack frame on the given link after the transmission of a QoS data frame sent under an established block ack agreement.

Remove the acknowledged frame from the outstanding packets and update the starting sequence number of the transmit window, if needed.

Parameters

linkId	the ID of the given link
mpdu	The acknowledged MPDU.

Definition at line 359 of file block-ack-manager.cc.

References ACKNOWLEDGED, HandleInFlightMpdu(), m_originatorAgreements, m_queue, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

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◆ NotifyGotBlockAck()

std::pair< uint16_t, uint16_t > ns3::BlockAckManager::NotifyGotBlockAck	(	uint8_t	linkId,
		const CtrlBAckResponseHeader &	blockAck,
		const Mac48Address &	recipient,
		const std::set< uint8_t > &	tids,
		size_t	index = 0 )

Parameters

linkId	the ID of the given link
blockAck	The received BlockAck frame.
recipient	Sender of BlockAck frame.
tids	the set of TIDs the acknowledged MPDUs belong to
index	the index of the Per AID TID Info subfield, in case of Multi-STA Block Ack, or 0, otherwise

Returns: a pair of values indicating the number of successfully received MPDUs and the number of failed MPDUs

Invoked upon receipt of a BlockAck frame on the given link. Typically, this function is called by ns3::QosTxop object. Performs a check on which MPDUs, previously sent with Ack Policy set to Block Ack, were correctly received by the recipient. An acknowledged MPDU is removed from the buffer, retransmitted otherwise. Note that tids is only used if blockAck is a Multi-STA Block Ack using All-ack context.

Definition at line 411 of file block-ack-manager.cc.

References ACKNOWLEDGED, ns3::CtrlBAckResponseHeader::GetAckType(), ns3::CtrlBAckResponseHeader::GetTidInfo(), HandleInFlightMpdu(), InactivityTimeout(), ns3::CtrlBAckResponseHeader::IsBasic(), ns3::CtrlBAckResponseHeader::IsCompressed(), ns3::CtrlBAckResponseHeader::IsExtendedCompressed(), ns3::CtrlBAckResponseHeader::IsMultiSta(), ns3::CtrlBAckResponseHeader::IsMultiTid(), ns3::Callback< R, UArgs >::IsNull(), ns3::CtrlBAckResponseHeader::IsPacketReceived(), m_originatorAgreements, m_queue, m_txFailedCallback, m_txOkCallback, ns3::MicroSeconds(), ns3::Simulator::Now(), NS_ABORT_MSG_IF, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), STAY_INFLIGHT, timeout, and TO_RETRANSMIT.

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◆ NotifyGotBlockAckRequest()

void ns3::BlockAckManager::NotifyGotBlockAckRequest	(	const Mac48Address &	originator,
		uint8_t	tid,
		uint16_t	startingSeq )

Parameters

originator	MAC address of the sender of the Block Ack Request
tid	Traffic ID
startingSeq	the starting sequence number in the Block Ack Request

Perform required actions upon receiving a Block Ack Request frame.

Definition at line 605 of file block-ack-manager.cc.

References m_recipientAgreements, and NS_LOG_FUNCTION.

◆ NotifyGotMpdu()

void ns3::BlockAckManager::NotifyGotMpdu ( Ptr< const WifiMpdu > mpdu )

Parameters

mpdu	the received MPDU

Perform required actions upon receiving an MPDU.

Definition at line 619 of file block-ack-manager.cc.

References m_recipientAgreements, NS_ASSERT, and NS_LOG_FUNCTION.

◆ NotifyMissedAck()

void ns3::BlockAckManager::NotifyMissedAck	(	uint8_t	linkId,
		Ptr< WifiMpdu >	mpdu )

Invoked upon missed reception of an Ack frame on the given link after the transmission of a QoS data frame sent under an established block ack agreement.

Remove the acknowledged frame from the outstanding packets and insert it in the retransmission queue.

Parameters

linkId	the ID of the given link
mpdu	The unacknowledged MPDU.

Definition at line 386 of file block-ack-manager.cc.

References HandleInFlightMpdu(), m_originatorAgreements, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_FUNCTION, and TO_RETRANSMIT.

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◆ NotifyMissedBlockAck()

void ns3::BlockAckManager::NotifyMissedBlockAck	(	uint8_t	linkId,
		const Mac48Address &	recipient,
		uint8_t	tid )

Parameters

linkId	the ID of the given link
recipient	Sender of the expected BlockAck frame.
tid	Traffic ID.

Invoked upon missed reception of a block ack frame on the given link. Typically, this function is called by ns3::QosTxop object. Performs a check on which MPDUs, previously sent with ack policy set to Block Ack, should be placed in the retransmission queue.

Definition at line 504 of file block-ack-manager.cc.

References HandleInFlightMpdu(), m_originatorAgreements, ns3::Simulator::Now(), NS_LOG_FUNCTION, STAY_INFLIGHT, and TO_RETRANSMIT.

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◆ NotifyOriginatorAgreementEstablished()

void ns3::BlockAckManager::NotifyOriginatorAgreementEstablished	(	const Mac48Address &	recipient,
		uint8_t	tid,
		uint16_t	startingSeq )

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	Traffic ID of transmitted packet.
startingSeq	starting sequence field

Puts corresponding originator agreement in established state and updates number of packets and starting sequence field. Invoked typically after a block ack refresh.

Definition at line 714 of file block-ack-manager.cc.

References ns3::OriginatorBlockAckAgreement::ESTABLISHED, m_originatorAgreements, m_originatorAgreementState, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

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◆ NotifyOriginatorAgreementNoReply()

void ns3::BlockAckManager::NotifyOriginatorAgreementNoReply	(	const Mac48Address &	recipient,
		uint8_t	tid )

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	Traffic ID of transmitted packet.

Marks an originator agreement after not receiving response to ADDBA request. During this state any packets in queue will be transmitted using normal MPDU. This also unblocks recipient address.

Definition at line 750 of file block-ack-manager.cc.

References m_originatorAgreements, m_originatorAgreementState, m_unblockPackets, ns3::OriginatorBlockAckAgreement::NO_REPLY, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

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◆ NotifyOriginatorAgreementRejected()

void ns3::BlockAckManager::NotifyOriginatorAgreementRejected	(	const Mac48Address &	recipient,
		uint8_t	tid )

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	Traffic ID of transmitted packet.

Marks an originator agreement as rejected. This happens if recipient station reject block ack setup by an ADDBA Response frame with a failure status code. For now we assume that every QoS station accepts a block ack setup.

Definition at line 733 of file block-ack-manager.cc.

References m_originatorAgreements, m_originatorAgreementState, m_unblockPackets, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_FUNCTION, and ns3::OriginatorBlockAckAgreement::REJECTED.

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◆ NotifyOriginatorAgreementReset()

void ns3::BlockAckManager::NotifyOriginatorAgreementReset	(	const Mac48Address &	recipient,
		uint8_t	tid )

Parameters

recipient	Address of peer station involved in block ack mechanism.
tid	Traffic ID of transmitted packet.

Set Originator BA agreement to a transitory state to reset it after not receiving response to ADDBA request.

Definition at line 767 of file block-ack-manager.cc.

References m_originatorAgreements, m_originatorAgreementState, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_FUNCTION, and ns3::OriginatorBlockAckAgreement::RESET.

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◆ operator=()

BlockAckManager & ns3::BlockAckManager::operator= ( const BlockAckManager & )

delete

◆ RemoveFromSendBarIfDataQueuedList()

void ns3::BlockAckManager::RemoveFromSendBarIfDataQueuedList	(	const Mac48Address &	recipient,
		uint8_t	tid )

Remove the given (recipient, TID) pair from the list of BA agreements for which a BAR shall only be sent if there are queued data frames belonging to those agreements.

Parameters

recipient	the recipient
tid	the TID

Definition at line 700 of file block-ack-manager.cc.

References m_sendBarIfDataQueued, and NS_LOG_FUNCTION.

◆ ScheduleBar()

void ns3::BlockAckManager::ScheduleBar	(	const CtrlBAckRequestHeader &	reqHdr,
		const WifiMacHeader &	hdr )

Parameters

reqHdr	the BlockAckRequest header
hdr	the 802.11 MAC header

Enqueue the given BlockAckRequest into the queue storing the next BAR frames to transmit. If a BAR for the same recipient and TID is already present in the queue, it is replaced by the new one. If the given BAR is retransmitted, it is placed at the head of the queue, otherwise at the tail.

Definition at line 649 of file block-ack-manager.cc.

References ns3::Create(), ns3::WifiMacHeader::GetAddr1(), ns3::CtrlBAckRequestHeader::GetTidInfo(), m_queue, NS_LOG_FUNCTION, ns3::WIFI_CTL_QUEUE, and ns3::WIFI_UNICAST.

Referenced by NotifyDiscardedMpdu().

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◆ SetBlockAckInactivityCallback()

void ns3::BlockAckManager::SetBlockAckInactivityCallback ( Callback< void, Mac48Address, uint8_t, bool > callback )

Set block ack inactivity callback.

Parameters

callback the block ack inactivity callback function

Definition at line 819 of file block-ack-manager.cc.

References m_blockAckInactivityTimeout, and NS_LOG_FUNCTION.

◆ SetBlockAckThreshold()

void ns3::BlockAckManager::SetBlockAckThreshold ( uint8_t nPackets )

Parameters

nPackets Minimum number of packets for use of block ack.

Upon receipt of a BlockAck frame, if total number of packets (packets in WifiMacQueue and buffered packets) is greater of nPackets, they are transmitted using block ack mechanism.

Definition at line 287 of file block-ack-manager.cc.

References m_blockAckThreshold, and NS_LOG_FUNCTION.

◆ SetBlockDestinationCallback()

void ns3::BlockAckManager::SetBlockDestinationCallback ( Callback< void, Mac48Address, uint8_t > callback )

Set block destination callback.

Parameters

callback the block destination callback

Definition at line 826 of file block-ack-manager.cc.

References m_blockPackets, and NS_LOG_FUNCTION.

◆ SetDroppedOldMpduCallback()

void ns3::BlockAckManager::SetDroppedOldMpduCallback ( DroppedOldMpdu callback )

Parameters

callback the callback to invoke when an old MPDU is dropped

Definition at line 852 of file block-ack-manager.cc.

References m_droppedOldMpduCallback.

◆ SetQueue()

void ns3::BlockAckManager::SetQueue ( const Ptr< WifiMacQueue > queue )

Parameters

queue The WifiMacQueue object.

Definition at line 783 of file block-ack-manager.cc.

References m_queue, and NS_LOG_FUNCTION.

◆ SetTxFailedCallback()

void ns3::BlockAckManager::SetTxFailedCallback ( TxFailed callback )

Parameters

callback the callback to invoke when a packet transmission was completed unsuccessfuly.

Definition at line 846 of file block-ack-manager.cc.

References m_txFailedCallback.

◆ SetTxOkCallback()

void ns3::BlockAckManager::SetTxOkCallback ( TxOk callback )

Parameters

callback the callback to invoke when a packet transmission was completed successfully.

Definition at line 840 of file block-ack-manager.cc.

References m_txOkCallback.

◆ SetUnblockDestinationCallback()

void ns3::BlockAckManager::SetUnblockDestinationCallback ( Callback< void, Mac48Address, uint8_t > callback )

Set unblock destination callback.

Parameters

callback the unblock destination callback

Definition at line 833 of file block-ack-manager.cc.

References m_unblockPackets, and NS_LOG_FUNCTION.

◆ StorePacket()

void ns3::BlockAckManager::StorePacket ( Ptr< WifiMpdu > mpdu )

Parameters

mpdu	MPDU to store.

Stores mpdu for a possible future retransmission. Retransmission occurs if the packet, in a BlockAck frame, is indicated by recipient as not received.

Definition at line 228 of file block-ack-manager.cc.

References m_originatorAgreements, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::SEQNO_SPACE_HALF_SIZE.

◆ UpdateOriginatorAgreement()

void ns3::BlockAckManager::UpdateOriginatorAgreement	(	const MgtAddBaResponseHeader &	respHdr,
		const Mac48Address &	recipient,
		uint16_t	startingSeq )

Parameters

respHdr	Relative Add block ack response (action frame).
recipient	Address of peer station involved in block ack mechanism.
startingSeq	the updated starting sequence number

Invoked upon receipt of a ADDBA response frame from recipient.

Definition at line 139 of file block-ack-manager.cc.

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Member Data Documentation

◆ m_blockAckInactivityTimeout

Callback<void, Mac48Address, uint8_t, bool> ns3::BlockAckManager::m_blockAckInactivityTimeout

private

BlockAck inactivity timeout callback.

Definition at line 497 of file block-ack-manager.h.

Referenced by InactivityTimeout(), and SetBlockAckInactivityCallback().

◆ m_blockAckThreshold

uint8_t ns3::BlockAckManager::m_blockAckThreshold

private

block ack threshold

Definition at line 494 of file block-ack-manager.h.

Referenced by SetBlockAckThreshold().

◆ m_blockPackets

Callback<void, Mac48Address, uint8_t> ns3::BlockAckManager::m_blockPackets

private

block packets callback

Definition at line 498 of file block-ack-manager.h.

Referenced by CreateOriginatorAgreement(), and SetBlockDestinationCallback().

◆ m_droppedOldMpduCallback

DroppedOldMpdu ns3::BlockAckManager::m_droppedOldMpduCallback

private

the dropped MPDU callback

Definition at line 502 of file block-ack-manager.h.

Referenced by HandleInFlightMpdu(), NotifyDiscardedMpdu(), and SetDroppedOldMpduCallback().

◆ m_originatorAgreements

OriginatorAgreements ns3::BlockAckManager::m_originatorAgreements

private

This data structure contains, for each originator block ack agreement (recipient, TID), a set of packets for which an ack by block ack is requested.

Every packet or fragment indicated as correctly received in BlockAck frame is erased from this data structure. Pushed back in retransmission queue otherwise.

Definition at line 488 of file block-ack-manager.h.

Referenced by CreateOriginatorAgreement(), DestroyOriginatorAgreement(), DoDispose(), GetAgreementAsOriginator(), GetBlockAckReqHeader(), GetNBufferedPackets(), GetOriginatorStartingSequence(), GetRecipientBufferSize(), NeedBarRetransmission(), NotifyDiscardedMpdu(), NotifyGotAck(), NotifyGotBlockAck(), NotifyMissedAck(), NotifyMissedBlockAck(), NotifyOriginatorAgreementEstablished(), NotifyOriginatorAgreementNoReply(), NotifyOriginatorAgreementRejected(), NotifyOriginatorAgreementReset(), StorePacket(), and UpdateOriginatorAgreement().

◆ m_originatorAgreementState

TracedCallback<Time, Mac48Address, uint8_t, OriginatorBlockAckAgreement::State> ns3::BlockAckManager::m_originatorAgreementState

private

The trace source fired when a state transition occurred.

Definition at line 508 of file block-ack-manager.h.

Referenced by CreateOriginatorAgreement(), GetTypeId(), NotifyOriginatorAgreementEstablished(), NotifyOriginatorAgreementNoReply(), NotifyOriginatorAgreementRejected(), NotifyOriginatorAgreementReset(), and UpdateOriginatorAgreement().

◆ m_queue

Ptr<WifiMacQueue> ns3::BlockAckManager::m_queue

private

queue

Definition at line 495 of file block-ack-manager.h.

Referenced by DoDispose(), HandleInFlightMpdu(), NotifyDiscardedMpdu(), NotifyGotAck(), NotifyGotBlockAck(), ScheduleBar(), and SetQueue().

◆ m_recipientAgreements

RecipientAgreements ns3::BlockAckManager::m_recipientAgreements

private

Recipient Block Ack agreements.

Definition at line 489 of file block-ack-manager.h.

Referenced by CreateRecipientAgreement(), DestroyRecipientAgreement(), GetAgreementAsRecipient(), NotifyGotBlockAckRequest(), and NotifyGotMpdu().

◆ m_sendBarIfDataQueued

std::list<AgreementKey> ns3::BlockAckManager::m_sendBarIfDataQueued

private

list of BA agreements for which a BAR shall only be sent if data is queued

Definition at line 491 of file block-ack-manager.h.

Referenced by AddToSendBarIfDataQueuedList(), GetSendBarIfDataQueuedList(), and RemoveFromSendBarIfDataQueuedList().

◆ m_txFailedCallback

TxFailed ns3::BlockAckManager::m_txFailedCallback

private

transmit failed callback

Definition at line 501 of file block-ack-manager.h.

Referenced by NotifyGotBlockAck(), and SetTxFailedCallback().

◆ m_txOkCallback

TxOk ns3::BlockAckManager::m_txOkCallback

private

transmit OK callback

Definition at line 500 of file block-ack-manager.h.

Referenced by NotifyGotBlockAck(), and SetTxOkCallback().

◆ m_unblockPackets

Callback<void, Mac48Address, uint8_t> ns3::BlockAckManager::m_unblockPackets

private

unblock packets callback

Definition at line 499 of file block-ack-manager.h.

Referenced by NotifyOriginatorAgreementNoReply(), NotifyOriginatorAgreementRejected(), SetUnblockDestinationCallback(), and UpdateOriginatorAgreement().

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

src/wifi/model/block-ack-manager.h
src/wifi/model/block-ack-manager.cc

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ AgreementKey

◆ AgreementStateTracedCallback

◆ DroppedOldMpdu

◆ OriginatorAgreementOptConstRef

◆ OriginatorAgreements

◆ OriginatorAgreementsI

◆ PacketQueue

◆ PacketQueueI

◆ RecipientAgreementOptConstRef

◆ RecipientAgreements

◆ TxFailed

◆ TxOk

Member Enumeration Documentation

◆ MpduStatus

Constructor & Destructor Documentation

◆ BlockAckManager() [1/2]

◆ ~BlockAckManager()

◆ BlockAckManager() [2/2]

Member Function Documentation

◆ AddToSendBarIfDataQueuedList()

◆ CreateOriginatorAgreement()

◆ CreateRecipientAgreement()

◆ DestroyOriginatorAgreement()

◆ DestroyRecipientAgreement()

◆ DoDispose()

◆ GetAgreementAsOriginator()

◆ GetAgreementAsRecipient()

◆ GetBlockAckReqHeader()

◆ GetNBufferedPackets()

◆ GetOriginatorStartingSequence()

◆ GetRecipientBufferSize()

◆ GetSendBarIfDataQueuedList()

◆ GetTypeId()

◆ HandleInFlightMpdu()

◆ InactivityTimeout()

◆ NeedBarRetransmission()

◆ NotifyDiscardedMpdu()

◆ NotifyGotAck()

◆ NotifyGotBlockAck()

◆ NotifyGotBlockAckRequest()

◆ NotifyGotMpdu()

◆ NotifyMissedAck()

◆ NotifyMissedBlockAck()

◆ NotifyOriginatorAgreementEstablished()

◆ NotifyOriginatorAgreementNoReply()

◆ NotifyOriginatorAgreementRejected()

◆ NotifyOriginatorAgreementReset()

◆ operator=()

◆ RemoveFromSendBarIfDataQueuedList()

◆ ScheduleBar()

◆ SetBlockAckInactivityCallback()

◆ SetBlockAckThreshold()

◆ SetBlockDestinationCallback()

◆ SetDroppedOldMpduCallback()

◆ SetQueue()

◆ SetTxFailedCallback()

◆ SetTxOkCallback()

◆ SetUnblockDestinationCallback()

◆ StorePacket()

◆ UpdateOriginatorAgreement()

Member Data Documentation

◆ m_blockAckInactivityTimeout

◆ m_blockAckThreshold

◆ m_blockPackets

◆ m_droppedOldMpduCallback

◆ m_originatorAgreements

◆ m_originatorAgreementState

◆ m_queue

◆ m_recipientAgreements

◆ m_sendBarIfDataQueued