Aggregator used to construct A-MPDUs. More...

#include "mpdu-aggregator.h"

Inheritance diagram for ns3::MpduAggregator:

Collaboration diagram for ns3::MpduAggregator:

Public Types
typedef std::list< std::pair< Ptr< Packet >, AmpduSubframeHeader > >	DeaggregatedMpdus
	A list of deaggregated packets and their A-MPDU subframe headers. More...

typedef std::list< std::pair< Ptr< Packet >, AmpduSubframeHeader > >::const_iterator	DeaggregatedMpdusCI
	A constant iterator for a list of deaggregated packets and their A-MPDU subframe headers. More...

typedef std::map< AcIndex, Ptr< QosTxop > >	EdcaQueues
	EDCA queues typedef. More...

Public Member Functions
	MpduAggregator ()

virtual	~MpduAggregator ()

uint32_t	GetMaxAmpduSize (Mac48Address recipient, uint8_t tid, WifiModulationClass modulation) const
	Determine the maximum size for an A-MPDU of the given TID that can be sent to the given receiver when using the given modulation class. More...

std::vector< Ptr< WifiMacQueueItem > >	GetNextAmpdu (Ptr< const WifiMacQueueItem > mpdu, WifiTxVector txVector, Time ppduDurationLimit=Seconds(0)) const
	Attempt to aggregate other MPDUs to the given MPDU, while meeting the following constraints: More...

void	SetEdcaQueues (EdcaQueues edcaQueues)
	Set the map of EDCA queues. 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...

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 void	AddHeaderAndPad (Ptr< Packet > mpdu, bool last, bool isSingleMpdu)

static void	Aggregate (Ptr< const WifiMacQueueItem > mpdu, Ptr< Packet > ampdu, bool isSingle)
	Aggregate an MPDU to an A-MPDU. More...

static DeaggregatedMpdus	Deaggregate (Ptr< Packet > aggregatedPacket)
	Deaggregates an A-MPDU by removing the A-MPDU subframe header and padding. More...

static uint32_t	GetSizeIfAggregated (uint32_t mpduSize, uint32_t ampduSize)
	Compute the size of the A-MPDU resulting from the aggregation of an MPDU of size mpduSize and an A-MPDU of size ampduSize. More...

static TypeId	GetTypeId (void)
	Get the type ID. More...

static std::list< Ptr< const Packet > >	PeekAmpduSubframes (Ptr< const Packet > aggregatedPacket)
	Peeks the A-MPDU subframes of the provided A-MPDU. More...

static Ptr< const Packet >	PeekMpduInAmpduSubframe (Ptr< const Packet > ampduSubframe)
	Peeks the MPDU contained in the A-MPDU subframe. More...

static std::list< Ptr< const Packet > >	PeekMpdus (Ptr< const Packet > aggregatedPacket)
	Peeks the MPDUs of the provided A-MPDU. 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...

Static Private Member Functions
static uint8_t	CalculatePadding (uint32_t ampduSize)

Private Attributes
EdcaQueues	m_edca
	the map of EDCA queues More...

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

virtual void	DoDispose (void)
	Destructor implementation. 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...

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

Aggregator used to construct A-MPDUs.

Introspection did not find any typical Config paths.

No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 80 bytes (on a 64-bit architecture).

Definition at line 41 of file mpdu-aggregator.h.

Member Typedef Documentation

◆ DeaggregatedMpdus

typedef std::list<std::pair<Ptr<Packet>, AmpduSubframeHeader> > ns3::MpduAggregator::DeaggregatedMpdus

A list of deaggregated packets and their A-MPDU subframe headers.

Definition at line 47 of file mpdu-aggregator.h.

◆ DeaggregatedMpdusCI

typedef std::list<std::pair<Ptr<Packet>, AmpduSubframeHeader> >::const_iterator ns3::MpduAggregator::DeaggregatedMpdusCI

A constant iterator for a list of deaggregated packets and their A-MPDU subframe headers.

Definition at line 51 of file mpdu-aggregator.h.

◆ EdcaQueues

typedef std::map<AcIndex, Ptr<QosTxop> > ns3::MpduAggregator::EdcaQueues

EDCA queues typedef.

Definition at line 55 of file mpdu-aggregator.h.

Constructor & Destructor Documentation

◆ MpduAggregator()

ns3::MpduAggregator::MpduAggregator ( )

Definition at line 58 of file mpdu-aggregator.cc.

◆ ~MpduAggregator()

ns3::MpduAggregator::~MpduAggregator ( )

virtual

Definition at line 62 of file mpdu-aggregator.cc.

Member Function Documentation

◆ AddHeaderAndPad()

void ns3::MpduAggregator::AddHeaderAndPad	(	Ptr< Packet >	mpdu,
		bool	last,
		bool	isSingleMpdu
	)

static

Parameters

mpdu	the MPDU we want to insert into an A-MPDU subframe.
last	true if it is the last MPDU.
isSingleMpdu	true if it is a single MPDU

Adds A-MPDU subframe header and padding to each MPDU that is part of an A-MPDU before it is sent.

Definition at line 110 of file mpdu-aggregator.cc.

References ns3::Packet::AddAtEnd(), ns3::Packet::AddHeader(), CalculatePadding(), ns3::Packet::GetSize(), NS_LOG_FUNCTION, ns3::AmpduSubframeHeader::SetEof(), and ns3::AmpduSubframeHeader::SetLength().

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◆ Aggregate()

void ns3::MpduAggregator::Aggregate	(	Ptr< const WifiMacQueueItem >	mpdu,
		Ptr< Packet >	ampdu,
		bool	isSingle
	)

static

Aggregate an MPDU to an A-MPDU.

Parameters

mpdu	the MPDU.
ampdu	the A-MPDU.
isSingle	whether it is a single MPDU.

Definition at line 73 of file mpdu-aggregator.cc.

References ns3::Packet::AddAtEnd(), ns3::Packet::AddHeader(), ns3::AddWifiMacTrailer(), CalculatePadding(), ns3::Packet::GetSize(), NS_ASSERT, NS_LOG_FUNCTION, ns3::AmpduSubframeHeader::SetEof(), and ns3::AmpduSubframeHeader::SetLength().

Referenced by ns3::WifiPsdu::GetPacket().

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◆ CalculatePadding()

uint8_t ns3::MpduAggregator::CalculatePadding ( uint32_t ampduSize )

staticprivate

Parameters

ampduSize the size of the A-MPDU that needs to be padded

Returns: the size of the padding that must be added to the end of an A-MPDU

Calculates how much padding must be added to the end of an A-MPDU of the given size (once another MPDU is aggregated). Each A-MPDU subframe is padded so that its length is multiple of 4 octets.

Definition at line 220 of file mpdu-aggregator.cc.

Referenced by AddHeaderAndPad(), Aggregate(), and GetSizeIfAggregated().

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◆ Deaggregate()

MpduAggregator::DeaggregatedMpdus ns3::MpduAggregator::Deaggregate ( Ptr< Packet > aggregatedPacket )

static

Deaggregates an A-MPDU by removing the A-MPDU subframe header and padding.

Parameters

aggregatedPacket the aggregated packet

Returns: list of deaggragted packets and their A-MPDU subframe headers

Definition at line 226 of file mpdu-aggregator.cc.

References ns3::Packet::CreateFragment(), ns3::AmpduSubframeHeader::GetLength(), ns3::Packet::GetSize(), NS_LOG_FUNCTION_NOARGS, NS_LOG_INFO, ns3::Packet::RemoveAtStart(), and ns3::Packet::RemoveHeader().

Referenced by ns3::MacLow::DeaggregateAmpduAndReceive().

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◆ GetMaxAmpduSize()

uint32_t ns3::MpduAggregator::GetMaxAmpduSize	(	Mac48Address	recipient,
		uint8_t	tid,
		WifiModulationClass	modulation
	)		const

Determine the maximum size for an A-MPDU of the given TID that can be sent to the given receiver when using the given modulation class.

Parameters

recipient	the receiver station address.
tid	the TID.
modulation	the modulation class.

Returns: the maximum A-MPDU size.

Definition at line 142 of file mpdu-aggregator.cc.

References ns3::AC_BE, ns3::AC_BK, ns3::AC_VI, ns3::AC_VO, ns3::UintegerValue::Get(), ns3::Txop::GetLow(), ns3::WifiNetDevice::GetMac(), ns3::WifiNetDevice::GetRemoteStationManager(), ns3::WifiRemoteStationManager::GetStationHeCapabilities(), ns3::WifiRemoteStationManager::GetStationHtCapabilities(), ns3::WifiRemoteStationManager::GetStationVhtCapabilities(), m_edca, min, NS_ABORT_MSG, NS_ABORT_MSG_IF, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosUtilsMapTidToAc(), ns3::WIFI_MOD_CLASS_HE, ns3::WIFI_MOD_CLASS_HT, and ns3::WIFI_MOD_CLASS_VHT.

Referenced by GetNextAmpdu().

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◆ GetNextAmpdu()

std::vector< Ptr< WifiMacQueueItem > > ns3::MpduAggregator::GetNextAmpdu	(	Ptr< const WifiMacQueueItem >	mpdu,
		WifiTxVector	txVector,
		Time	ppduDurationLimit = `Seconds (0)`
	)		const

Attempt to aggregate other MPDUs to the given MPDU, while meeting the following constraints:

the size of the resulting A-MPDU does not exceed the maximum A-MPDU size as determined for the modulation class indicated by the given TxVector
the time to transmit the resulting PPDU, according to the given TxVector, does not exceed both the maximum PPDU duration allowed by the corresponding modulation class (if any) and the given PPDU duration limit (if non null)

For now, only non-broadcast QoS Data frames can be aggregated (do not pass other types of frames to this method). MPDUs to aggregate are looked for among those with the same TID and receiver as the given MPDU.

The resulting A-MPDU is returned as a vector of the constituent MPDUs (including the given MPDU), which are not actually aggregated (call the Aggregate method afterwards to get the actual A-MPDU). If aggregation was not possible (aggregation is disabled, there is no Block Ack agreement established with the receiver, or another MPDU to aggregate was not found), the returned vector is empty.

Parameters