This queue implements the timeout procedure described in (Section 9.19.2.6 "Retransmit procedures" paragraph 6; IEEE 802.11-2012). More...

#include "wifi-mac-queue.h"

Inheritance diagram for ns3::WifiMacQueue:

Collaboration diagram for ns3::WifiMacQueue:

Public Member Functions
	WifiMacQueue (AcIndex ac=AC_UNDEF)
	Constructor.

	~WifiMacQueue () override

Ptr< WifiMpdu >	Dequeue () override
	Dequeue the packet in the front of the queue.

void	DequeueIfQueued (const std::list< Ptr< const WifiMpdu > > &mpdus)
	Dequeue the given MPDUs if they are stored in this queue.

bool	Enqueue (Ptr< WifiMpdu > item) override
	Enqueue the given Wifi MAC queue item at the end of the queue.

void	ExtractAllExpiredMpdus () const
	Move MPDUs with expired lifetime from all the container queues to the container queue storing MPDUs with expired lifetime.

void	ExtractExpiredMpdus (const WifiContainerQueueId &queueId) const
	Move MPDUs with expired lifetime from the container queue identified by the given queue ID to the container queue storing MPDUs with expired lifetime.

AcIndex	GetAc () const
	Get the Access Category of the packets stored in this queue.

Ptr< WifiMpdu >	GetAlias (Ptr< const WifiMpdu > mpdu, uint8_t linkId)

Time	GetMaxDelay () const
	Return the maximum delay before the packet is discarded.

uint32_t	GetNBytes (const WifiContainerQueueId &queueId) const
	Get the amount of bytes currently stored in the container queue identified by the given queue ID.

uint32_t	GetNPackets (const WifiContainerQueueId &queueId) const
	Get the number of MPDUs currently stored in the container queue identified by the given queue ID.

Ptr< WifiMpdu >	GetOriginal (Ptr< WifiMpdu > mpdu)
	Unlike the GetOriginal() method of WifiMpdu, this method returns a non-const pointer to the original copy of the given MPDU.

Ptr< const WifiMpdu >	Peek () const override
	Peek the packet in the front of the queue.

Ptr< WifiMpdu >	Peek (uint8_t linkId) const
	Peek the packet in the front of the queue for transmission on the given link.

Ptr< WifiMpdu >	PeekByQueueId (const WifiContainerQueueId &queueId, Ptr< const WifiMpdu > item=nullptr) const
	Search and return the first packet present in the container queue identified by the given queue ID.

Ptr< WifiMpdu >	PeekByTidAndAddress (uint8_t tid, Mac48Address dest, Ptr< const WifiMpdu > item=nullptr) const
	Search and return, if present in the queue, the first packet having the receiver address equal to dest, and TID equal to tid.

Ptr< WifiMpdu >	PeekFirstAvailable (uint8_t linkId, Ptr< const WifiMpdu > item=nullptr) const
	Return first available packet for transmission on the given link.

Ptr< WifiMpdu >	Remove () override
	Remove the packet in the front of the queue.

Ptr< WifiMpdu >	Remove (Ptr< const WifiMpdu > item)
	Remove the given item from the queue and return the item following the removed one, if any, or a null pointer otherwise.

void	Replace (Ptr< const WifiMpdu > currentItem, Ptr< WifiMpdu > newItem)
	Replace the given current item with the given new item.

void	SetMaxDelay (Time delay)
	Set the maximum delay before the packet is discarded.

void	SetScheduler (Ptr< WifiMacQueueScheduler > scheduler)
	Set the wifi MAC queue scheduler.

bool	TtlExceeded (Ptr< const WifiMpdu > item, const Time &now)
	Remove the given item if it has been in the queue for too long.

void	WipeAllExpiredMpdus ()
	Remove all MPDUs with expired lifetime from this WifiMacQueue object.

Public Member Functions inherited from ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >
	Queue ()

	~Queue () override

virtual Ptr< WifiMpdu >	Dequeue ()=0
	Remove an item from the Queue (each subclass defines the position), counting it and tracing it as dequeued.

virtual bool	Enqueue (Ptr< WifiMpdu > item)=0
	Place an item into the Queue (each subclass defines the position)

void	Flush ()
	Flush the queue by calling Remove() on each item enqueued.

virtual Ptr< const WifiMpdu >	Peek () const=0
	Get a copy of an item in the queue (each subclass defines the position) without removing it.

virtual Ptr< WifiMpdu >	Remove ()=0
	Remove an item from the Queue (each subclass defines the position), counting it and tracing it as both dequeued and dropped.

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

	~QueueBase () override

QueueSize	GetCurrentSize () const

QueueSize	GetMaxSize () const

uint32_t	GetNBytes () const

uint32_t	GetNPackets () const

uint32_t	GetTotalDroppedBytes () const

uint32_t	GetTotalDroppedBytesAfterDequeue () const

uint32_t	GetTotalDroppedBytesBeforeEnqueue () const

uint32_t	GetTotalDroppedPackets () const

uint32_t	GetTotalDroppedPacketsAfterDequeue () const

uint32_t	GetTotalDroppedPacketsBeforeEnqueue () const

uint32_t	GetTotalReceivedBytes () const

uint32_t	GetTotalReceivedPackets () const

bool	IsEmpty () const

void	ResetStatistics ()
	Resets the counts for dropped packets, dropped bytes, received packets, and received bytes.

void	SetMaxSize (QueueSize size)
	Set the maximum size of this queue.

bool	WouldOverflow (uint32_t nPackets, uint32_t nBytes) const
	Check if the queue would overflow with additional bytes or packets Note: the check is performed according to the queue's operating mode (bytes or packets).

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.

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) 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.

virtual TypeId	GetInstanceTypeId () const =0
	Get the most derived TypeId for this Object.

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::Queue< WifiMpdu, ns3::WifiMacQueueContainer >
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::QueueBase
static void	AppendItemTypeIfNotPresent (std::string &typeId, const std::string &itemType)
	Append the item type to the provided type ID if the latter does not end with '>'.

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::Queue< WifiMpdu, ns3::WifiMacQueueContainer >
Ptr< WifiMpdu >	DoDequeue (ConstIterator pos)
	Pull the item to dequeue from the queue.

void	DoDispose () override
	Destructor implementation.

bool	DoEnqueue (ConstIterator pos, Ptr< WifiMpdu > item)
	Push an item in the queue.

bool	DoEnqueue (ConstIterator pos, Ptr< WifiMpdu > item, Iterator &ret)
	Push an item in the queue.

Ptr< const WifiMpdu >	DoPeek (ConstIterator pos) const
	Peek the front item in the queue.

Ptr< WifiMpdu >	DoRemove (ConstIterator pos)
	Pull the item to drop from the queue.

void	DropAfterDequeue (Ptr< WifiMpdu > item)
	Drop a packet after dequeue.

void	DropBeforeEnqueue (Ptr< WifiMpdu > item)
	Drop a packet before enqueue.

const ns3::WifiMacQueueContainer &	GetContainer () const
	Get a const reference to the container of queue items.

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

virtual void	DoDispose ()
	Destructor implementation.

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 Member Functions
void	DoDequeue (const std::list< ConstIterator > &iterators)
	Wrapper for the DoDequeue method provided by the base class that additionally resets the iterator field of the dequeued items and notifies the scheduler, if any item was dequeued.

bool	DoEnqueue (ConstIterator pos, Ptr< WifiMpdu > item)
	Wrapper for the DoEnqueue method provided by the base class that additionally sets the iterator field of the item and updates internal statistics, if insertion succeeded.

Ptr< WifiMpdu >	DoRemove (ConstIterator pos)
	Wrapper for the DoRemove method provided by the base class that additionally resets the iterator field of the item and notifies the scheduleer, if an item was dropped.

Iterator	GetIt (Ptr< const WifiMpdu > mpdu) const

bool	Insert (ConstIterator pos, Ptr< WifiMpdu > item)
	Enqueue the given Wifi MAC queue item before the given position.

Private Attributes
AcIndex	m_ac
	the access category

Time	m_maxDelay
	Time to live for packets in the queue.

Ptr< WifiMacQueueScheduler >	m_scheduler
	the MAC queue scheduler

TracedCallback< Ptr< const WifiMpdu > >	m_traceExpired
	Traced callback: fired when a packet is dropped due to lifetime expiration.

	NS_LOG_TEMPLATE_DECLARE
	redefinition of the log component

Additional Inherited Members
Public Types inherited from ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >
typedef WifiMpdu	ItemType
	Define ItemType as the type of the stored elements.

Protected Types inherited from ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >
typedef Container::const_iterator	ConstIterator
	Const iterator.

typedef Container::iterator	Iterator
	Iterator.

Protected Attributes inherited from ns3::QueueBase
QueueSize	m_maxSize
	max queue size

TracedValue< uint32_t >	m_nBytes
	Number of bytes in the queue.

TracedValue< uint32_t >	m_nPackets
	Number of packets in the queue.

uint32_t	m_nTotalDroppedBytes
	Total dropped bytes.

uint32_t	m_nTotalDroppedBytesAfterDequeue
	Total dropped bytes after dequeue.

uint32_t	m_nTotalDroppedBytesBeforeEnqueue
	Total dropped bytes before enqueue.

uint32_t	m_nTotalDroppedPackets
	Total dropped packets.

uint32_t	m_nTotalDroppedPacketsAfterDequeue
	Total dropped packets after dequeue.

uint32_t	m_nTotalDroppedPacketsBeforeEnqueue
	Total dropped packets before enqueue.

uint32_t	m_nTotalReceivedBytes
	Total received bytes.

uint32_t	m_nTotalReceivedPackets
	Total received packets.

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

Detailed Description

This queue implements the timeout procedure described in (Section 9.19.2.6 "Retransmit procedures" paragraph 6; IEEE 802.11-2012).

When a packet is received by the MAC, to be sent to the PHY, it is queued in the internal queue after being tagged by the current time.

When a packet is dequeued, the queue checks its timestamp to verify whether or not it should be dropped. If dot11EDCATableMSDULifetime has elapsed, it is dropped. Otherwise, it is returned to the caller.

Compiling python bindings fails if the namespace (ns3) is not specified for WifiMacQueueContainerT.

Config Paths

ns3::WifiMacQueue is accessible through the following paths with Config::Set and Config::Connect:

"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/Txop/Queue"

Attributes

MaxDelay: If a packet stays longer than this delay in the queue, it is dropped.
- Set with class: ns3::TimeValue
- Underlying type: Time +9.22337e+18ns:+9.22337e+18ns
- Initial value: +5e+08ns
- Flags: constructwrite
MaxSize: The max queue size
- Set with class: ns3::QueueSizeValue
- Underlying type: QueueSize
- Initial value: 500p
- Flags: constructwriteread

TraceSources

Expired: MPDU dropped because its lifetime expired.
Callback signature: ns3::WifiMpdu::TracedCallback

TraceSources defined in parent class ns3::Queue<WifiMpdu,WifiMacQueueContainer>

Dequeue: Dequeue a packet from the queue.
Callback signature: ns3::WifiMpdu::TracedCallback
Drop: Drop a packet (for whatever reason).
Callback signature: ns3::WifiMpdu::TracedCallback
DropAfterDequeue: Drop a packet after dequeue.
Callback signature: ns3::WifiMpdu::TracedCallback
DropBeforeEnqueue: Drop a packet before enqueue.
Callback signature: ns3::WifiMpdu::TracedCallback
Enqueue: Enqueue a packet in the queue.
Callback signature: ns3::WifiMpdu::TracedCallback

TraceSources defined in parent class ns3::QueueBase

BytesInQueue: Number of bytes currently stored in the queue
Callback signature: ns3::TracedValueCallback::Uint32
PacketsInQueue: Number of packets currently stored in the queue
Callback signature: ns3::TracedValueCallback::Uint32

Size of this type is 392 bytes (on a 64-bit architecture).

Definition at line 65 of file wifi-mac-queue.h.

Constructor & Destructor Documentation

◆ WifiMacQueue()

ns3::WifiMacQueue::WifiMacQueue ( AcIndex ac = AC_UNDEF )

Constructor.

Parameters

ac	the Access Category of the packets stored in this queue

Definition at line 65 of file wifi-mac-queue.cc.

◆ ~WifiMacQueue()

ns3::WifiMacQueue::~WifiMacQueue ( )

override

Definition at line 71 of file wifi-mac-queue.cc.

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

◆ Dequeue()

Ptr< WifiMpdu > ns3::WifiMacQueue::Dequeue ( )

overridevirtual

Dequeue the packet in the front of the queue.

Returns: the packet

Implements ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >.

Definition at line 263 of file wifi-mac-queue.cc.

References NS_ABORT_MSG.

◆ DequeueIfQueued()

void ns3::WifiMacQueue::DequeueIfQueued ( const std::list< Ptr< const WifiMpdu > > & mpdus )

Dequeue the given MPDUs if they are stored in this queue.

Parameters

mpdus the given MPDUs

Definition at line 272 of file wifi-mac-queue.cc.

References DoDequeue(), GetIt(), m_ac, NS_ASSERT, and NS_LOG_FUNCTION.

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◆ DoDequeue()

void ns3::WifiMacQueue::DoDequeue ( const std::list< ConstIterator > & iterators )

private

Wrapper for the DoDequeue method provided by the base class that additionally resets the iterator field of the dequeued items and notifies the scheduler, if any item was dequeued.

Parameters

iterators the list of iterators pointing to the items to dequeue

Definition at line 485 of file wifi-mac-queue.cc.

References ns3::QueueBase::GetMaxSize(), m_ac, m_scheduler, NS_LOG_FUNCTION, and ns3::QueueBase::SetMaxSize().

Referenced by DequeueIfQueued(), and Replace().

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◆ DoDispose()

void ns3::WifiMacQueue::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 77 of file wifi-mac-queue.cc.

References ns3::Queue< Item, Container >::DoDispose(), m_scheduler, and NS_LOG_FUNCTION.

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◆ DoEnqueue()

bool ns3::WifiMacQueue::DoEnqueue	(	ConstIterator	pos,
		Ptr< WifiMpdu >	item
	)

private

Wrapper for the DoEnqueue method provided by the base class that additionally sets the iterator field of the item and updates internal statistics, if insertion succeeded.

Parameters

pos	the position before where the item will be inserted
item	the item to enqueue

Returns: true if success, false if the packet has been dropped.

Definition at line 436 of file wifi-mac-queue.cc.

References DoRemove(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), GetIt(), ns3::QueueBase::GetMaxSize(), ns3::WifiMacQueueContainer::GetQueueId(), m_ac, m_maxDelay, m_scheduler, ns3::Time::Max(), ns3::Simulator::Now(), NS_LOG_FUNCTION, and ns3::QueueBase::SetMaxSize().

Referenced by Insert().

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◆ DoRemove()

Ptr< WifiMpdu > ns3::WifiMacQueue::DoRemove ( ConstIterator pos )

private

Wrapper for the DoRemove method provided by the base class that additionally resets the iterator field of the item and notifies the scheduleer, if an item was dropped.

Parameters

pos	the position of the item to drop

Returns: the dropped item.

Definition at line 512 of file wifi-mac-queue.cc.

References ns3::Queue< Item, Container >::DoRemove(), ns3::QueueBase::GetMaxSize(), m_ac, m_scheduler, NS_LOG_FUNCTION, and ns3::QueueBase::SetMaxSize().

Referenced by DoEnqueue(), Remove(), and TtlExceeded().

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◆ Enqueue()

bool ns3::WifiMacQueue::Enqueue ( Ptr< WifiMpdu > item )

overridevirtual

Enqueue the given Wifi MAC queue item at the end of the queue.

Parameters

item	the Wifi MAC queue item to be enqueued at the end

Returns: true if success, false if the packet has been dropped

Implements ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >.

Definition at line 221 of file wifi-mac-queue.cc.

References ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), ns3::WifiMacQueueContainer::GetQueueId(), Insert(), and NS_LOG_FUNCTION.

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◆ ExtractAllExpiredMpdus()

void ns3::WifiMacQueue::ExtractAllExpiredMpdus ( ) const

Move MPDUs with expired lifetime from all the container queues to the container queue storing MPDUs with expired lifetime.

Each MPDU that is found to have an expired lifetime feeds the "Expired" trace source and is notified to the scheduler.

Note: that such MPDUs are not removed from the WifiMacQueue (and hence are still accounted for in the overall statistics kept by the Queue base class) in order to make this method const.

Definition at line 143 of file wifi-mac-queue.cc.

References ns3::WifiMacQueueContainer::ExtractAllExpiredMpdus(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), m_ac, m_scheduler, m_traceExpired, NS_LOG_FUNCTION, and ns3::Simulator::ScheduleNow().

Referenced by WipeAllExpiredMpdus().

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◆ ExtractExpiredMpdus()

void ns3::WifiMacQueue::ExtractExpiredMpdus ( const WifiContainerQueueId & queueId ) const

Move MPDUs with expired lifetime from the container queue identified by the given queue ID to the container queue storing MPDUs with expired lifetime.

Each MPDU that is found to have an expired lifetime feeds the "Expired" trace source and is notified to the scheduler.

Note: that such MPDUs are not removed from the WifiMacQueue (and hence are still accounted for in the overall statistics kept by the Queue base class) in order to make this method const.

Parameters

queueId the given queue ID

Definition at line 119 of file wifi-mac-queue.cc.

References ns3::WifiMacQueueContainer::ExtractExpiredMpdus(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), m_ac, m_scheduler, m_traceExpired, NS_LOG_FUNCTION, and ns3::Simulator::ScheduleNow().

Referenced by PeekByQueueId().

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◆ GetAc()

AcIndex ns3::WifiMacQueue::GetAc ( ) const

Get the Access Category of the packets stored in this queue.

Returns: the Access Category of the packets stored in this queue

Definition at line 85 of file wifi-mac-queue.cc.

References m_ac.

◆ GetAlias()

Ptr< WifiMpdu > ns3::WifiMacQueue::GetAlias	(	Ptr< const WifiMpdu >	mpdu,
		uint8_t	linkId
	)

Parameters

mpdu	the given MPDU
linkId	the ID of the given link

Returns: the alias of the given MPDU that is inflight on the given link, if any, or a null pointer, otherwise

Definition at line 104 of file wifi-mac-queue.cc.

References GetIt().

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◆ GetIt()

WifiMacQueue::Iterator ns3::WifiMacQueue::GetIt ( Ptr< const WifiMpdu > mpdu ) const

private

Parameters

mpdu	the given MPDU

Returns: the queue iterator stored by the given MPDU

Definition at line 91 of file wifi-mac-queue.cc.

References NS_ASSERT.

Referenced by DequeueIfQueued(), DoEnqueue(), GetAlias(), GetOriginal(), PeekByQueueId(), Remove(), Replace(), and TtlExceeded().

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◆ GetMaxDelay()

Time ns3::WifiMacQueue::GetMaxDelay ( ) const

Return the maximum delay before the packet is discarded.

Returns: the maximum delay

Definition at line 215 of file wifi-mac-queue.cc.

References m_maxDelay.

◆ GetNBytes()

uint32_t ns3::WifiMacQueue::GetNBytes ( const WifiContainerQueueId & queueId ) const

Get the amount of bytes currently stored in the container queue identified by the given queue ID.

Parameters

queueId the given queue ID

Returns: the amount of bytes currently stored in the container queue

Definition at line 430 of file wifi-mac-queue.cc.

References ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), and ns3::WifiMacQueueContainer::GetNBytes().

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◆ GetNPackets()

uint32_t ns3::WifiMacQueue::GetNPackets ( const WifiContainerQueueId & queueId ) const

Get the number of MPDUs currently stored in the container queue identified by the given queue ID.

Parameters

queueId the given queue ID

Returns: the number of MPDUs currently stored in the container queue

Definition at line 424 of file wifi-mac-queue.cc.

References ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), and ns3::WifiMacQueueContainer::GetQueue().

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◆ GetOriginal()

Ptr< WifiMpdu > ns3::WifiMacQueue::GetOriginal ( Ptr< WifiMpdu > mpdu )

Unlike the GetOriginal() method of WifiMpdu, this method returns a non-const pointer to the original copy of the given MPDU.

Parameters

mpdu	the given MPDU

Returns: the original copy of the given MPDU

Definition at line 98 of file wifi-mac-queue.cc.

References GetIt().

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◆ GetTypeId()

TypeId ns3::WifiMacQueue::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 41 of file wifi-mac-queue.cc.

References ns3::QueueBase::GetMaxSize(), m_traceExpired, ns3::MakeTimeAccessor(), ns3::MakeTimeChecker(), ns3::MakeTraceSourceAccessor(), ns3::MilliSeconds(), SetMaxDelay(), ns3::QueueBase::SetMaxSize(), and ns3::TypeId::SetParent().

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◆ Insert()

bool ns3::WifiMacQueue::Insert	(	ConstIterator	pos,
		Ptr< WifiMpdu >	item
	)

private

Enqueue the given Wifi MAC queue item before the given position.

Parameters

pos	the position before which the item is to be inserted
item	the Wifi MAC queue item to be enqueued

Returns: true if success, false if the packet has been dropped

Definition at line 230 of file wifi-mac-queue.cc.

References DoEnqueue(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), ns3::QueueBase::GetMaxSize(), ns3::QueueBase::GetNPackets(), ns3::WifiMacQueueContainer::GetQueue(), ns3::WifiMacQueueContainer::GetQueueId(), ns3::Simulator::Now(), NS_ABORT_MSG_IF, NS_ASSERT_MSG, NS_LOG_FUNCTION, ns3::PACKETS, and WipeAllExpiredMpdus().

Referenced by Enqueue(), and Replace().

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◆ Peek() [1/2]

Ptr< const WifiMpdu > ns3::WifiMacQueue::Peek ( ) const

overridevirtual

Peek the packet in the front of the queue.

The packet is not removed.

Returns: the packet

Implements ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >.

Definition at line 293 of file wifi-mac-queue.cc.

References NS_ABORT_MSG.

Referenced by Remove().

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◆ Peek() [2/2]

Ptr< WifiMpdu > ns3::WifiMacQueue::Peek ( uint8_t linkId ) const

Peek the packet in the front of the queue for transmission on the given link.

The packet is not removed.

Parameters

linkId the ID of the link onto which we can transmit a packet

Returns: the packet

Definition at line 301 of file wifi-mac-queue.cc.

References ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), ns3::WifiMacQueueContainer::GetQueue(), m_ac, m_scheduler, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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◆ PeekByQueueId()

Ptr< WifiMpdu > ns3::WifiMacQueue::PeekByQueueId	(	const WifiContainerQueueId &	queueId,
		Ptr< const WifiMpdu >	item = `nullptr`
	)		const

Search and return the first packet present in the container queue identified by the given queue ID.

If item is a null pointer, the search starts from the head of the container queue; MPDUs with expired lifetime at the head of the container queue are ignored (and moved to the container queue storing MPDUs with expired lifetime). If item is not a null pointer, the search starts from the packet following item in the container queue (and we do not check for expired lifetime because we assume that a previous call was made with a null pointer as argument, which removed the MPDUs with expired lifetime).

Parameters

queueId	the given queue ID
item	the item after which the search starts from

Returns: the peeked packet or nullptr if no packet was found

Definition at line 326 of file wifi-mac-queue.cc.

References ExtractExpiredMpdus(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), GetIt(), ns3::WifiMacQueueContainer::GetQueue(), ns3::WifiMacQueueContainer::GetQueueId(), NS_ASSERT, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by PeekByTidAndAddress(), and PeekFirstAvailable().

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◆ PeekByTidAndAddress()

Ptr< WifiMpdu > ns3::WifiMacQueue::PeekByTidAndAddress	(	uint8_t	tid,
		Mac48Address	dest,
		Ptr< const WifiMpdu >	item = `nullptr`
	)		const

Search and return, if present in the queue, the first packet having the receiver address equal to dest, and TID equal to tid.

If item is not a null pointer, the search starts from the packet following item in the queue; otherwise, the search starts from the head of the queue. This method does not remove the packet from the queue. It is typically used by ns3::QosTxop in order to perform correct MSDU aggregation (A-MSDU).

Parameters

tid	the given TID
dest	the given destination
item	the item after which the search starts from

Returns: the peeked packet or nullptr if no packet was found

Definition at line 317 of file wifi-mac-queue.cc.

References ns3::Mac48Address::IsGroup(), NS_ABORT_IF, NS_LOG_FUNCTION, PeekByQueueId(), ns3::WIFI_QOSDATA_QUEUE, and ns3::WIFI_UNICAST.

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◆ PeekFirstAvailable()

Ptr< WifiMpdu > ns3::WifiMacQueue::PeekFirstAvailable	(	uint8_t	linkId,
		Ptr< const WifiMpdu >	item = `nullptr`
	)		const

Return first available packet for transmission on the given link.

If item is not a null pointer, the search starts from the packet following item in the queue; otherwise, the search starts from the head of the queue. The packet is not removed from queue.

Parameters

linkId	the ID of the given link
item	the item after which the search starts from

Returns: the peeked packet or nullptr if no packet was found

Definition at line 349 of file wifi-mac-queue.cc.

References ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), ns3::WifiMacQueueContainer::GetQueue(), ns3::WifiMacQueueContainer::GetQueueId(), m_ac, m_scheduler, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and PeekByQueueId().

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◆ Remove() [1/2]

Ptr< WifiMpdu > ns3::WifiMacQueue::Remove ( )

overridevirtual

Remove the packet in the front of the queue.

Returns: the packet

Implements ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >.

Definition at line 386 of file wifi-mac-queue.cc.

References Peek(), and Remove().

Referenced by Remove().

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◆ Remove() [2/2]

Ptr< WifiMpdu > ns3::WifiMacQueue::Remove ( Ptr< const WifiMpdu > item )

Remove the given item from the queue and return the item following the removed one, if any, or a null pointer otherwise.

If removeExpired is true, all the items in the queue from the head to the given position are removed if their lifetime expired.

Parameters

item	the item to be removed

Returns: the removed item

Definition at line 392 of file wifi-mac-queue.cc.

References DoRemove(), GetIt(), m_ac, NS_ASSERT, and NS_LOG_FUNCTION.

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◆ Replace()

void ns3::WifiMacQueue::Replace	(	Ptr< const WifiMpdu >	currentItem,
		Ptr< WifiMpdu >	newItem
	)

Replace the given current item with the given new item.

Actually, the current item is dequeued and the new item is enqueued in its place. In this way, statistics about queue size (in terms of bytes) are correctly updated.

Parameters

currentItem	the given current item
newItem	the given new item

Definition at line 404 of file wifi-mac-queue.cc.

References DoDequeue(), GetIt(), Insert(), m_ac, NS_ABORT_IF, NS_ASSERT, and NS_LOG_FUNCTION.

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◆ SetMaxDelay()

void ns3::WifiMacQueue::SetMaxDelay ( Time delay )

Set the maximum delay before the packet is discarded.

Parameters

delay the maximum delay

Definition at line 208 of file wifi-mac-queue.cc.

References m_maxDelay, and NS_LOG_FUNCTION.

Referenced by GetTypeId().

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◆ SetScheduler()

void ns3::WifiMacQueue::SetScheduler ( Ptr< WifiMacQueueScheduler > scheduler )

Set the wifi MAC queue scheduler.

Parameters

scheduler the wifi MAC queue scheduler

Definition at line 201 of file wifi-mac-queue.cc.

References m_scheduler, and NS_LOG_FUNCTION.

◆ TtlExceeded()

bool ns3::WifiMacQueue::TtlExceeded	(	Ptr< const WifiMpdu >	item,
		const Time &	now
	)

Remove the given item if it has been in the queue for too long.

Return true if the item is removed, false otherwise.

Parameters

item	the item whose lifetime is checked
now	a copy of Simulator::Now()

Returns: true if the item is removed, false otherwise

Definition at line 186 of file wifi-mac-queue.cc.

References DoRemove(), GetIt(), m_maxDelay, m_traceExpired, NS_ASSERT, and NS_LOG_DEBUG.

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◆ WipeAllExpiredMpdus()

void ns3::WifiMacQueue::WipeAllExpiredMpdus ( )

Remove all MPDUs with expired lifetime from this WifiMacQueue object.

Definition at line 167 of file wifi-mac-queue.cc.

References ns3::Queue< Item, Container >::DoRemove(), ExtractAllExpiredMpdus(), ns3::WifiMacQueueContainer::GetAllExpiredMpdus(), ns3::Queue< WifiMpdu, ns3::WifiMacQueueContainer >::GetContainer(), and NS_LOG_FUNCTION.

Referenced by Insert().

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Member Data Documentation

◆ m_ac

AcIndex ns3::WifiMacQueue::m_ac

private

the access category

Definition at line 345 of file wifi-mac-queue.h.

Referenced by DequeueIfQueued(), DoDequeue(), DoEnqueue(), DoRemove(), ExtractAllExpiredMpdus(), ExtractExpiredMpdus(), GetAc(), Peek(), PeekFirstAvailable(), Remove(), and Replace().

◆ m_maxDelay

Time ns3::WifiMacQueue::m_maxDelay

private

Time to live for packets in the queue.

Definition at line 344 of file wifi-mac-queue.h.

Referenced by DoEnqueue(), GetMaxDelay(), SetMaxDelay(), and TtlExceeded().

◆ m_scheduler

Ptr<WifiMacQueueScheduler> ns3::WifiMacQueue::m_scheduler

private

the MAC queue scheduler

Definition at line 346 of file wifi-mac-queue.h.

Referenced by DoDequeue(), DoDispose(), DoEnqueue(), DoRemove(), ExtractAllExpiredMpdus(), ExtractExpiredMpdus(), Peek(), PeekFirstAvailable(), and SetScheduler().

◆ m_traceExpired

TracedCallback<Ptr<const WifiMpdu> > ns3::WifiMacQueue::m_traceExpired

private

Traced callback: fired when a packet is dropped due to lifetime expiration.

Definition at line 349 of file wifi-mac-queue.h.

Referenced by ExtractAllExpiredMpdus(), ExtractExpiredMpdus(), GetTypeId(), and TtlExceeded().

◆ NS_LOG_TEMPLATE_DECLARE

ns3::WifiMacQueue::NS_LOG_TEMPLATE_DECLARE

private

redefinition of the log component

Definition at line 351 of file wifi-mac-queue.h.

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

src/wifi/model/wifi-mac-queue.h
src/wifi/model/wifi-mac-queue.cc

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Config Paths

Attributes

TraceSources

TraceSources defined in parent class ns3::Queue<WifiMpdu,WifiMacQueueContainer>

TraceSources defined in parent class ns3::QueueBase

Constructor & Destructor Documentation

◆ WifiMacQueue()

◆ ~WifiMacQueue()

Member Function Documentation

◆ Dequeue()

◆ DequeueIfQueued()

◆ DoDequeue()

◆ DoDispose()

◆ DoEnqueue()

◆ DoRemove()

◆ Enqueue()

◆ ExtractAllExpiredMpdus()

◆ ExtractExpiredMpdus()

◆ GetAc()

◆ GetAlias()

◆ GetIt()

◆ GetMaxDelay()

◆ GetNBytes()

◆ GetNPackets()

◆ GetOriginal()

◆ GetTypeId()

◆ Insert()

◆ Peek() [1/2]

◆ Peek() [2/2]

◆ PeekByQueueId()

◆ PeekByTidAndAddress()

◆ PeekFirstAvailable()

◆ Remove() [1/2]

◆ Remove() [2/2]

◆ Replace()

◆ SetMaxDelay()

◆ SetScheduler()

◆ TtlExceeded()

◆ WipeAllExpiredMpdus()

Member Data Documentation

◆ m_ac

◆ m_maxDelay

◆ m_scheduler

◆ m_traceExpired

◆ NS_LOG_TEMPLATE_DECLARE