Handle packet fragmentation and retransmissions for QoS data frames as well as MSDU aggregation (A-MSDU) and block ack sessions, for a given access class. More...

#include "qos-txop.h"

Inheritance diagram for ns3::QosTxop:

Public Member Functions
	QosTxop ()

virtual	~QosTxop ()

void	BaTxFailed (const WifiMacHeader &hdr)
	The packet we sent was successfully received by the receiver. More...

void	BaTxOk (const WifiMacHeader &hdr)
	The packet we sent was successfully received by the receiver. More...

void	CompleteAmpduTransfer (Mac48Address recipient, uint8_t tid)

void	CompleteConfig (void)
	Complete block ACK configuration. More...

void	CompleteMpduTx (Ptr< const Packet > packet, WifiMacHeader hdr, Time tstamp)
	Stores an MPDU (part of an A-MPDU) in blockackagreement (i.e. More...

void	EndTxNoAck (void)
	Event handler when a transmission that does not require an ACK has completed. More...

bool	GetAmpduExist (Mac48Address dest) const
	Return whether A-MPDU is used to transmit data to a peer station. More...

bool	GetBaAgreementExists (Mac48Address address, uint8_t tid) const

uint8_t	GetBlockAckThreshold (void) const
	Return the current threshold for block ACK mechanism. More...

Ptr< Packet >	GetFragmentPacket (WifiMacHeader *hdr)
	Get the next fragment from the packet with appropriate Wifi header for the fragment. More...

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

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

uint16_t	GetNextSequenceNumberFor (WifiMacHeader *hdr)
	Return the next sequence number for the given header. More...

TypeOfStation	GetTypeOfStation (void) const
	Return type of station. More...

void	GotAck (void)
	Event handler when an ACK is received. More...

void	GotAddBaResponse (const MgtAddBaResponseHeader *respHdr, Mac48Address recipient)
	Event handler when an ADDBA response is received. More...

void	GotBlockAck (const CtrlBAckResponseHeader *blockAck, Mac48Address recipient, double rxSnr, WifiMode txMode, double dataSnr)
	Event handler when a Block ACK is received. More...

void	GotDelBaFrame (const MgtDelBaHeader *delBaHdr, Mac48Address recipient)
	Event handler when a DELBA frame is received. More...

bool	IsQosTxop () const
	Check for QoS TXOP. More...

Mac48Address	MapDestAddressForAggregation (const WifiMacHeader &hdr)
	This functions are used only to correctly set destination address in A-MSDU subframes. More...

Mac48Address	MapSrcAddressForAggregation (const WifiMacHeader &hdr)
	This functions are used only to correctly set source address in A-MSDU subframes. More...

void	MissedAck (void)
	Event handler when an ACK is missed. More...

void	MissedBlockAck (uint8_t nMpdus)
	Event handler when a Block ACK timeout has occurred. More...

void	MissedCts (void)
	Event handler when a CTS timeout has occurred. More...

bool	NeedBarRetransmission (void)
	Check if Block ACK Request should be re-transmitted. More...

bool	NeedFragmentation (void) const
	Check if the current packet should be fragmented. More...

void	NotifyAccessGranted (void)
	Notify the EDCAF that access has been granted. More...

void	NotifyCollision (void)
	Notify the EDCAF that collision has occurred. More...

void	NotifyInternalCollision (void)
	Notify the EDCAF that internal collision has occurred. More...

Ptr< const Packet >	PeekNextRetransmitPacket (WifiMacHeader &header, uint8_t tid, Time *timestamp)
	Peek in retransmit queue and get the next packet without removing it from the queue. More...

uint16_t	PeekNextSequenceNumberFor (WifiMacHeader *hdr)
	Return the next sequence number for the Traffic ID and destination, but do not pick it (i.e. More...

void	PushFront (Ptr< const Packet > packet, const WifiMacHeader &hdr)

void	RemoveRetransmitPacket (uint8_t tid, Mac48Address recipient, uint16_t seqnumber)
	Remove a packet after you peek in the retransmit queue and get it. More...

void	RestartAccessIfNeeded (void)
	Restart access request if needed. More...

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

void	SetAccessCategory (AcIndex ac)
	Set the access category of this EDCAF. More...

void	SetAmpduExist (Mac48Address dest, bool enableAmpdu)
	Set indication whether A-MPDU is used to transmit data to a peer station. More...

void	SetBlockAckInactivityTimeout (uint16_t timeout)
	Set the Block Ack inactivity timeout. More...

void	SetBlockAckThreshold (uint8_t threshold)
	Set threshold for block ACK mechanism. More...

void	SetMpduAggregator (const Ptr< MpduAggregator > aggr)
	Set the aggregator used to construct A-MPDU subframes. More...

void	SetMsduAggregator (const Ptr< MsduAggregator > aggr)
	Set the aggregator used to construct A-MSDU subframes. More...

void	SetTypeOfStation (TypeOfStation type)
	Set type of station with the given type. More...

void	SetWifiRemoteStationManager (const Ptr< WifiRemoteStationManager > remoteManager)
	Set WifiRemoteStationsManager this QosTxop is associated to. More...

void	StartAccessIfNeeded (void)
	Request access from DCF manager if needed. More...

void	StartNextPacket (void)
	Start transmission for the next packet if allowed by the TxopLimit. More...

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

virtual	~Txop ()

int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model. More...

virtual void	Cancel (void)
	Cancel the transmission. More...

bool	CanStartNextPolling (void) const
	Check if the next PCF transmission can fit in the remaining CFP duration. More...

uint8_t	GetAifsn (void) const
	Return the number of slots that make up an AIFS. More...

Ptr< MacLow >	GetLow (void) const
	Return the MacLow associated with this Txop. More...

uint32_t	GetMaxCw (void) const
	Return the maximum contention window size. More...

uint32_t	GetMinCw (void) const
	Return the minimum contention window size. More...

Time	GetTxopLimit (void) const
	Return the TXOP limit. More...

Ptr< WifiMacQueue >	GetWifiMacQueue () const
	Return the packet queue associated with this Txop. More...

void	GotCfEnd (void)
	Event handler when a CF-END frame is received. More...

virtual bool	IsAccessRequested (void) const

void	MissedCfPollResponse (bool expectedCfAck)
	Event handler when a response to a CF-POLL frame is missed. More...

virtual void	NotifyChannelSwitching (void)
	When a channel switching occurs, enqueued packets are removed. More...

virtual void	NotifyOff (void)
	When off operation occurs, the queue gets cleaned up. More...

virtual void	NotifyOn (void)
	When on operation occurs, channel access will be started. More...

virtual void	NotifySleep (void)
	When sleep operation occurs, if there is a pending packet transmission, it will be reinserted to the front of the queue. More...

virtual void	NotifyWakeUp (void)
	When wake up operation occurs, channel access will be restarted. More...

virtual void	Queue (Ptr< const Packet > packet, const WifiMacHeader &hdr)

void	SendCfFrame (WifiMacType frameType, Mac48Address addr)
	Sends CF frame to sta with address addr. More...

void	SetAifsn (uint8_t aifsn)
	Set the number of slots that make up an AIFS. More...

void	SetChannelAccessManager (const Ptr< ChannelAccessManager > manager)
	Set ChannelAccessManager this Txop is associated to. More...

void	SetMacLow (const Ptr< MacLow > low)
	Set MacLow associated with this Txop. More...

void	SetMaxCw (uint32_t maxCw)
	Set the maximum contention window size. More...

void	SetMinCw (uint32_t minCw)
	Set the minimum contention window size. More...

void	SetTxDroppedCallback (TxDropped callback)

void	SetTxFailedCallback (TxFailed callback)

void	SetTxMiddle (const Ptr< MacTxMiddle > txMiddle)
	Set MacTxMiddle this Txop is associated to. More...

void	SetTxOkCallback (TxOk callback)

void	SetTxopLimit (Time txopLimit)
	Set the TXOP limit. More...

void	StartBackoffNow (uint32_t nSlots)

virtual void	StartNextFragment (void)
	Start transmission for the next fragment. 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 TypeId	GetTypeId (void)
	Get the type ID. More...

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

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

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

Public Attributes
std::map< Mac48Address, bool >	m_aMpduEnabled
	list containing flags whether A-MPDU is enabled for a given destination address More...

Private Member Functions
void	CompleteTx (void)
	For now is typically invoked to complete transmission of a packets sent with ack policy Block Ack: the packet is buffered and dcf is reset. More...

void	DoDispose (void)
	Destructor implementation. More...

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

uint32_t	GetFragmentOffset (void) const
	Calculate the offset for the current fragment. More...

uint32_t	GetFragmentSize (void) const
	Calculate the size of the current fragment. More...

uint32_t	GetNextFragmentSize (void) const
	Calculate the size of the next fragment. More...

uint32_t	GetNextTxopFragmentSize (uint32_t fragmentNumber) const
	Calculate the size of the next TXOP fragment. More...

uint32_t	GetNTxopFragment () const
	Calculate the number of TXOP fragments needed for the transmission of the current packet. More...

uint32_t	GetTxopFragmentOffset (uint32_t fragmentNumber) const
	Calculate the offset for the fragment. More...

uint32_t	GetTxopFragmentSize () const
	Calculate the size of the current TXOP fragment. More...

Time	GetTxopRemaining (void) const
	Return the remaining duration in the current TXOP. More...

bool	HasTxop (void) const
	Check if the station has TXOP granted for the next MPDU. More...

bool	IsLastFragment (void) const
	Check if the current fragment is the last fragment. More...

bool	IsTxopFragmentation () const
	Check if the current packet is fragmented because of an exceeded TXOP duration. More...

void	SendAddBaRequest (Mac48Address recipient, uint8_t tid, uint16_t startSeq, uint16_t timeout, bool immediateBAck)
	Sends an ADDBA Request to establish a block ack agreement with sta addressed by recipient for tid tid. More...

void	SendBlockAckRequest (const Bar &bar)
	After that all packets, for which a block ack agreement was established, have been transmitted, we have to send a block ack request. More...

bool	SetupBlockAckIfNeeded ()
	If number of packets in the queue reaches m_blockAckThreshold value, an ADDBA Request frame is sent to destination in order to setup a block ack. More...

void	VerifyBlockAck (void)
	Verifies if dequeued packet has to be transmitted with ack policy Block Ack. More...

Private Attributes
AcIndex	m_ac
	the access category More...

TracedValue< uint32_t >	m_backoffTrace
	backoff trace value More...

Ptr< BlockAckManager >	m_baManager
	the Block ACK manager More...

uint16_t	m_blockAckInactivityTimeout
	the Block ACK inactivity timeout More...

uint8_t	m_blockAckThreshold
	the Block ACK threshold More...

BlockAckType	m_blockAckType
	the Block ACK type More...

Bar	m_currentBar
	the current BAR More...

bool	m_currentIsFragmented
	flag whether current packet is fragmented More...

Time	m_currentPacketTimestamp
	the current packet timestamp More...

TracedValue< uint32_t >	m_cwTrace
	CW trace value. More...

bool	m_isAccessRequestedForRts
	flag whether access is requested to transmit a RTS frame More...

Ptr< MpduAggregator >	m_mpduAggregator
	A-MPDU aggregator. More...

Ptr< MsduAggregator >	m_msduAggregator
	A-MSDU aggregator. More...

Ptr< QosBlockedDestinations >	m_qosBlockedDestinations
	QOS blocked destinations. More...

Time	m_startTxop
	the start TXOP time More...

TracedCallback< Time, Time >	m_txopTrace
	TXOP trace callback. More...

TypeOfStation	m_typeOfStation
	the type of station More...

Friends
class	::AmpduAggregationTest
	Allow test cases to access private members. More...

class	AggregationCapableTransmissionListener
	allow AggregationCapableTransmissionListener class access More...

Additional Inherited Members
Public Types inherited from ns3::Txop
typedef Callback< void, Ptr< const Packet > >	TxDropped
	typedef for a callback to invoke when a packet is dropped. More...

typedef Callback< void, const WifiMacHeader & >	TxFailed
	typedef for a callback to invoke when a packet transmission was failed. More...

typedef Callback< void, const WifiMacHeader & >	TxOk
	typedef for a callback to invoke when a packet transmission was completed successfully. More...

Protected Member Functions inherited from ns3::Txop
uint32_t	GetBackoffSlots (void) const
	Return the current number of backoff slots. More...

Time	GetBackoffStart (void) const
	Return the time when the backoff procedure started. More...

uint32_t	GetCw (void) const

bool	NeedDataRetransmission (Ptr< const Packet > packet, const WifiMacHeader &hdr)
	Check if DATA should be re-transmitted if ACK was missed. More...

bool	NeedRtsRetransmission (Ptr< const Packet > packet, const WifiMacHeader &hdr)
	Check if RTS should be re-transmitted if CTS was missed. More...

void	NextFragment (void)
	Continue to the next fragment. More...

virtual void	NotifyAccessRequested (void)
	Notify that access request has been received. More...

void	ResetCw (void)
	Update the value of the CW variable to take into account a transmission success or a transmission abort (stop transmission of a packet after the maximum number of retransmissions has been reached). More...

void	TxDroppedPacket (Ptr< const WifiMacQueueItem > item)
	Pass the packet included in the wifi MAC queue item to the packet dropped callback. More...

void	UpdateBackoffSlotsNow (uint32_t nSlots, Time backoffUpdateBound)
	Update backoff slots that nSlots has passed. More...

void	UpdateFailedCw (void)
	Update the value of the CW variable to take into account a transmission failure. More...

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

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

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

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

Protected Attributes inherited from ns3::Txop
bool	m_accessRequested
	flag whether channel access is already requested More...

uint8_t	m_aifsn
	the AIFSN More...

uint32_t	m_backoffSlots
	the backoff slots More...

Time	m_backoffStart
	the backoffStart variable is used to keep track of the time at which a backoff was started or the time at which the backoff counter was last updated. More...

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

WifiMacHeader	m_currentHdr
	the current header More...

Ptr< const Packet >	m_currentPacket
	the current packet More...

MacLowTransmissionParameters	m_currentParams
	current transmission parameters More...

uint32_t	m_cw
	the current CW More...

uint32_t	m_cwMax
	the CW maximum More...

uint32_t	m_cwMin
	the CW minimum More...

uint8_t	m_fragmentNumber
	the fragment number More...

Ptr< MacLow >	m_low
	the MacLow More...

Ptr< WifiMacQueue >	m_queue
	the wifi MAC queue More...

Ptr< UniformRandomVariable >	m_rng
	the random stream More...

Ptr< WifiRemoteStationManager >	m_stationManager
	the wifi remote station manager More...

TxDropped	m_txDroppedCallback
	the packet dropped callback More...

TxFailed	m_txFailedCallback
	the transmit failed callback More...

Ptr< MacTxMiddle >	m_txMiddle
	the MacTxMiddle More...

TxOk	m_txOkCallback
	the transmit OK callback More...

Time	m_txopLimit
	the txop limit time 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

Handle packet fragmentation and retransmissions for QoS data frames as well as MSDU aggregation (A-MSDU) and block ack sessions, for a given access class.

This class implements the packet fragmentation and retransmission policy for QoS data frames. It uses the ns3::MacLow and ns3::ChannelAccessManager helper classes to respectively send packets and decide when to send them. Packets are stored in a ns3::WifiMacQueue until they can be sent.

This queue contains packets for a particular access class. Possibles access classes are:

AC_VO : voice, tid = 6,7
AC_VI : video, tid = 4,5
AC_BE : best-effort, tid = 0,3
AC_BK : background, tid = 1,2

This class also implements block ack sessions and MSDU aggregation (A-MSDU). If A-MSDU is enabled for that access class, it picks several packets from the queue instead of a single one and sends the aggregated packet to ns3::MacLow.

The fragmentation policy currently implemented uses a simple threshold: any packet bigger than this threshold is fragmented in fragments whose size is smaller than the threshold.

The retransmission policy is also very simple: every packet is retransmitted until it is either successfully transmitted or it has been retransmitted up until the ssrc or slrc thresholds.

The rts/cts policy is similar to the fragmentation policy: when a packet is bigger than a threshold, the rts/cts protocol is used.

Config Paths

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

"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/Txop/$ns3::QosTxop"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/VO_Txop"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/VI_Txop"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/BE_Txop"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/BK_Txop"

No Attributes are defined for this type.

Attributes defined in parent class ns3::Txop

MinCw: The minimum value of the contention window.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 15
- Flags: construct write read
MaxCw: The maximum value of the contention window.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 1023
- Flags: construct write read
Aifsn: The AIFSN: the default value conforms to non-QOS.
- Set with class: ns3::UintegerValue
- Underlying type: uint8_t 0:255
- Initial value: 2
- Flags: construct write read
TxopLimit: The TXOP limit: the default value conforms to non-QoS.
- Set with class: ns3::TimeValue
- Underlying type: Time –9223372036854775808.0ns:+9223372036854775807.0ns
- Initial value: +0.0ns
- Flags: construct write read
Queue: The WifiMacQueue object
- Set with class: ns3::PointerValue
- Underlying type: ns3::Ptr< ns3::WifiMacQueue>
- Flags: read

TraceSources

BackoffTrace: Trace source for backoff values
Callback signature: ns3::TracedValueCallback::Uint32
CwTrace: Trace source for contention window values
Callback signature: ns3::TracedValueCallback::Uint32
TxopTrace: Trace source for txop start and duration times
Callback signature: ns3::TracedValueCallback::Time

Size of this type is 448 bytes (on a 64-bit architecture).

Definition at line 90 of file qos-txop.h.

Constructor & Destructor Documentation

◆ QosTxop()

ns3::QosTxop::QosTxop ( )

Definition at line 71 of file qos-txop.cc.

References BaTxFailed(), BaTxOk(), ns3::QosBlockedDestinations::Block(), m_baManager, m_blockAckType, m_qosBlockedDestinations, ns3::Txop::m_queue, ns3::MakeCallback(), NS_LOG_FUNCTION, and ns3::QosBlockedDestinations::Unblock().

◆ ~QosTxop()

ns3::QosTxop::~QosTxop ( )

virtual

Definition at line 92 of file qos-txop.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

◆ BaTxFailed()

void ns3::QosTxop::BaTxFailed ( const WifiMacHeader & hdr )

The packet we sent was successfully received by the receiver.

Parameters

hdr	the header of the packet that we failed to sent.

Definition at line 1553 of file qos-txop.cc.

References ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), ns3::Txop::m_currentHdr, ns3::Txop::m_txFailedCallback, and NS_LOG_FUNCTION.

Referenced by QosTxop().

◆ BaTxOk()

void ns3::QosTxop::BaTxOk ( const WifiMacHeader & hdr )

The packet we sent was successfully received by the receiver.

Parameters

hdr	the header of the packet that we successfully sent.

Definition at line 1543 of file qos-txop.cc.

References ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), ns3::Txop::m_currentHdr, ns3::Txop::m_txOkCallback, and NS_LOG_FUNCTION.

Referenced by QosTxop().

◆ CompleteAmpduTransfer()

void ns3::QosTxop::CompleteAmpduTransfer	(	Mac48Address	recipient,
		uint8_t	tid
	)

Parameters

recipient	address of peer station involved in block ack mechanism.
tid	Ttraffic ID of transmitted packet.

This function resets the status of OriginatorBlockAckAgreement after the transfer of an A-MPDU with ImmediateBlockAck policy (i.e. no BAR is scheduled).

Definition at line 115 of file qos-txop.cc.

References m_baManager.

◆ CompleteConfig()

void ns3::QosTxop::CompleteConfig ( void )

Complete block ACK configuration.

Definition at line 1404 of file qos-txop.cc.

References m_ac, m_baManager, ns3::Txop::m_low, ns3::Txop::m_txMiddle, ns3::MakeCallback(), NS_LOG_FUNCTION, ns3::MacLow::RegisterEdcaForAc(), and SendDelbaFrame().

Referenced by AmpduAggregationTest::DoRun(), and TwoLevelAggregationTest::DoRun().

◆ CompleteMpduTx()

void ns3::QosTxop::CompleteMpduTx	(	Ptr< const Packet >	packet,
		WifiMacHeader	hdr,
		Time	tstamp
	)

Stores an MPDU (part of an A-MPDU) in blockackagreement (i.e.

the sender is waiting for a blockack containing the sequence number of this MPDU). It also calls NotifyMpdu transmission that updates the status of OriginatorBlockAckAgreement.

Parameters

packet	received packet.
hdr	received Wi-Fi header.
tstamp	timestamp.

Definition at line 1332 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::MacTxMiddle::GetNextSeqNumberByTidAndAddress(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::IsQosData(), m_baManager, ns3::Txop::m_txMiddle, ns3::WifiMacHeader::NORMAL_ACK, and NS_ASSERT.

◆ CompleteTx()

void ns3::QosTxop::CompleteTx ( void )

private

For now is typically invoked to complete transmission of a packets sent with ack policy Block Ack: the packet is buffered and dcf is reset.

Definition at line 1316 of file qos-txop.cc.

References ns3::WifiMacHeader::BLOCK_ACK, ns3::WifiMacHeader::GetAddr1(), ns3::MacTxMiddle::GetNextSeqNumberByTidAndAddress(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::IsQosBlockAck(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsRetry(), m_baManager, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, m_currentPacketTimestamp, ns3::Txop::m_txMiddle, and NS_LOG_FUNCTION.

Referenced by NotifyAccessGranted(), and StartNextPacket().

◆ DoDispose()

void ns3::QosTxop::DoDispose ( void )

privatevirtual

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::Txop.

Definition at line 98 of file qos-txop.cc.

References ns3::Txop::DoDispose(), m_baManager, m_mpduAggregator, m_msduAggregator, m_qosBlockedDestinations, and NS_LOG_FUNCTION.

◆ DoInitialize()

void ns3::QosTxop::DoInitialize ( void )

privatevirtual

Initialize() implementation.

This method is called only once by Initialize(). If the user calls Initialize() multiple times, DoInitialize() is called only the first time.

Subclasses are expected to override this method and chain up to their parent's implementation once they are done. It is safe to call GetObject() and AggregateObject() from within this method.

Reimplemented from ns3::Txop.

Definition at line 1533 of file qos-txop.cc.

References ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), m_backoffTrace, m_cwTrace, ns3::Txop::m_rng, NS_LOG_FUNCTION, ns3::Txop::ResetCw(), and ns3::Txop::StartBackoffNow().

◆ EndTxNoAck()

void ns3::QosTxop::EndTxNoAck ( void )

virtual

Event handler when a transmission that does not require an ACK has completed.

Reimplemented from ns3::Txop.

Definition at line 933 of file qos-txop.cc.

References ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), ns3::Txop::GetTxopLimit(), ns3::WifiMacHeader::IsQosBlockAck(), ns3::WifiMacHeader::IsQosData(), ns3::Time::IsStrictlyPositive(), m_backoffTrace, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, m_cwTrace, ns3::Txop::m_rng, m_startTxop, m_txopTrace, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Txop::ResetCw(), StartAccessIfNeeded(), and ns3::Txop::StartBackoffNow().

◆ GetAmpduExist()

bool ns3::QosTxop::GetAmpduExist ( Mac48Address dest ) const

Return whether A-MPDU is used to transmit data to a peer station.

Parameters

dest	address of peer station

Returns: true if A-MPDU is used by the peer station

Definition at line 1298 of file qos-txop.cc.

References m_aMpduEnabled, and NS_LOG_FUNCTION.

Referenced by MissedAck(), MissedBlockAck(), MissedCts(), NeedFragmentation(), NotifyAccessGranted(), and StartNextPacket().

◆ GetBaAgreementExists()

bool ns3::QosTxop::GetBaAgreementExists	(	Mac48Address	address,
		uint8_t	tid
	)		const

Parameters

address	recipient address of the peer station
tid	traffic ID.

Returns: true if a block ack agreement exists, false otherwise.

Checks if a block ack agreement exists with station addressed by recipient for tid tid.

Definition at line 109 of file qos-txop.cc.

References first::address, and m_baManager.

Referenced by MissedAck(), MissedCts(), and NeedFragmentation().

◆ GetBlockAckThreshold()

uint8_t ns3::QosTxop::GetBlockAckThreshold ( void ) const

Return the current threshold for block ACK mechanism.

Returns: the current threshold for block ACK mechanism.

Definition at line 1428 of file qos-txop.cc.

References m_blockAckThreshold, and NS_LOG_FUNCTION.

Referenced by NotifyAccessGranted(), and SetupBlockAckIfNeeded().

◆ GetFragmentOffset()

uint32_t ns3::QosTxop::GetFragmentOffset ( void ) const

privatevirtual

Calculate the offset for the current fragment.

Returns: the offset for the current fragment.

Reimplemented from ns3::Txop.

Definition at line 1110 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiRemoteStationManager::GetFragmentOffset(), GetTxopFragmentOffset(), IsTxopFragmentation(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_fragmentNumber, and ns3::Txop::m_stationManager.

Referenced by GetFragmentPacket().

◆ GetFragmentPacket()

Ptr< Packet > ns3::QosTxop::GetFragmentPacket ( WifiMacHeader * hdr )

virtual

Get the next fragment from the packet with appropriate Wifi header for the fragment.

Parameters

hdr	Wi-Fi header.

Returns: the fragment with the current fragment number.

Reimplemented from ns3::Txop.

Definition at line 1142 of file qos-txop.cc.

References ns3::Packet::CreateFragment(), GetFragmentOffset(), GetFragmentSize(), IsLastFragment(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_fragmentNumber, NS_LOG_FUNCTION, ns3::WifiMacHeader::SetFragmentNumber(), ns3::WifiMacHeader::SetMoreFragments(), and ns3::WifiMacHeader::SetNoMoreFragments().

Referenced by NotifyAccessGranted().

◆ GetFragmentSize()

uint32_t ns3::QosTxop::GetFragmentSize ( void ) const

privatevirtual

Calculate the size of the current fragment.

Returns: the size of the current fragment.

Reimplemented from ns3::Txop.

Definition at line 1080 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiRemoteStationManager::GetFragmentSize(), GetNextTxopFragmentSize(), IsTxopFragmentation(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_fragmentNumber, and ns3::Txop::m_stationManager.

Referenced by GetFragmentPacket().

◆ GetMpduAggregator()

Ptr< MpduAggregator > ns3::QosTxop::GetMpduAggregator ( void ) const

Returns the aggregator used to construct A-MPDU subframes.

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

Definition at line 702 of file qos-txop.cc.

References m_mpduAggregator.

Referenced by ns3::RegularWifiMac::ConfigureAggregation(), NeedFragmentation(), and VerifyBlockAck().

◆ GetMsduAggregator()

Ptr< MsduAggregator > ns3::QosTxop::GetMsduAggregator ( void ) const

Returns the aggregator used to construct A-MSDU subframes.

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

Definition at line 696 of file qos-txop.cc.

References m_msduAggregator.

Referenced by ns3::RegularWifiMac::ConfigureAggregation().

◆ GetNextFragmentSize()

uint32_t ns3::QosTxop::GetNextFragmentSize ( void ) const

privatevirtual

Calculate the size of the next fragment.

Returns: the size of the next fragment.

Reimplemented from ns3::Txop.

Definition at line 1095 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiRemoteStationManager::GetFragmentSize(), GetNextTxopFragmentSize(), IsTxopFragmentation(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_fragmentNumber, and ns3::Txop::m_stationManager.

Referenced by NotifyAccessGranted().

◆ GetNextSequenceNumberFor()

uint16_t ns3::QosTxop::GetNextSequenceNumberFor ( WifiMacHeader * hdr )

Return the next sequence number for the given header.

Parameters

hdr	Wi-Fi header.

Returns: the next sequence number.

Definition at line 142 of file qos-txop.cc.

References ns3::MacTxMiddle::GetNextSequenceNumberFor(), and ns3::Txop::m_txMiddle.

◆ GetNextTxopFragmentSize()

uint32_t ns3::QosTxop::GetNextTxopFragmentSize ( uint32_t fragmentNumber ) const

private

Calculate the size of the next TXOP fragment.

Parameters

fragmentNumber number of the next fragment

Returns: the next TXOP fragment size

Definition at line 1061 of file qos-txop.cc.

References GetNTxopFragment(), ns3::Packet::GetSize(), GetTxopFragmentSize(), ns3::Txop::m_currentPacket, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by GetFragmentSize(), and GetNextFragmentSize().

◆ GetNTxopFragment()

uint32_t ns3::QosTxop::GetNTxopFragment ( ) const

private

Calculate the number of TXOP fragments needed for the transmission of the current packet.

Returns: the number of TXOP fragments needed for the transmission of the current packet

Definition at line 1022 of file qos-txop.cc.

References ns3::Packet::GetSize(), GetTxopFragmentSize(), ns3::Txop::m_currentPacket, and NS_LOG_DEBUG.

Referenced by GetNextTxopFragmentSize(), and IsLastFragment().

◆ GetTxopFragmentOffset()

uint32_t ns3::QosTxop::GetTxopFragmentOffset ( uint32_t fragmentNumber ) const

private

Calculate the offset for the fragment.

Parameters

fragmentNumber number of the fragment

Returns: the TXOP fragment offset

Definition at line 1035 of file qos-txop.cc.

References ns3::Packet::GetSize(), GetTxopFragmentSize(), ns3::Txop::m_currentPacket, NS_ASSERT, and NS_LOG_DEBUG.

Referenced by GetFragmentOffset().

◆ GetTxopFragmentSize()

uint32_t ns3::QosTxop::GetTxopFragmentSize ( ) const

private

Calculate the size of the current TXOP fragment.

Returns: the size of the current TXOP fragment

Definition at line 989 of file qos-txop.cc.

References ns3::MacLow::CalculateOverallTxTime(), ns3::Txop::GetLow(), ns3::Packet::GetSize(), ns3::Txop::GetTxopLimit(), ns3::Time::IsZero(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_currentParams, and NS_ASSERT.

Referenced by GetNextTxopFragmentSize(), GetNTxopFragment(), GetTxopFragmentOffset(), and IsTxopFragmentation().

◆ GetTxopRemaining()

Time ns3::QosTxop::GetTxopRemaining ( void ) const

private

Return the remaining duration in the current TXOP.

Returns: the remaining duration in the current TXOP.

Definition at line 882 of file qos-txop.cc.

References ns3::Txop::GetTxopLimit(), ns3::Time::IsStrictlyNegative(), m_startTxop, ns3::Simulator::Now(), NS_LOG_FUNCTION, and ns3::Seconds().

Referenced by HasTxop().

◆ GetTypeId()

TypeId ns3::QosTxop::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 49 of file qos-txop.cc.

References m_backoffTrace, m_cwTrace, m_txopTrace, ns3::MakeTraceSourceAccessor(), and ns3::TypeId::SetParent().

◆ GetTypeOfStation()

TypeOfStation ns3::QosTxop::GetTypeOfStation ( void ) const

Return type of station.

Returns: type of station.

Definition at line 136 of file qos-txop.cc.

References m_typeOfStation.

Referenced by MapDestAddressForAggregation(), and MapSrcAddressForAggregation().

◆ GotAck()

void ns3::QosTxop::GotAck ( void )

virtual

Event handler when an ACK is received.

Reimplemented from ns3::Txop.

Definition at line 490 of file qos-txop.cc.

References ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_DELBA, ns3::WifiActionHeader::ActionValue::blockAck, ns3::Packet::Copy(), ns3::MacLow::DestroyBlockAckAgreement(), ns3::WifiActionHeader::GetAction(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiActionHeader::GetCategory(), ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), ns3::Packet::GetSize(), ns3::MgtDelBaHeader::GetTid(), ns3::Txop::GetTxopLimit(), ns3::MacLowTransmissionParameters::HasNextPacket(), HasTxop(), ns3::WifiMacHeader::IsAction(), ns3::MgtDelBaHeader::IsByOriginator(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), ns3::WifiMacHeader::IsQosAmsdu(), ns3::WifiMacHeader::IsQosData(), ns3::Time::IsStrictlyPositive(), m_backoffTrace, m_baManager, ns3::Txop::m_currentHdr, m_currentIsFragmented, ns3::Txop::m_currentPacket, ns3::Txop::m_currentParams, m_cwTrace, ns3::Txop::m_fragmentNumber, ns3::Txop::m_low, ns3::Txop::m_rng, m_startTxop, ns3::Txop::m_txOkCallback, m_txopTrace, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Packet::PeekHeader(), ns3::Packet::RemoveHeader(), ns3::Txop::ResetCw(), RestartAccessIfNeeded(), and ns3::Txop::StartBackoffNow().

◆ GotAddBaResponse()

void ns3::QosTxop::GotAddBaResponse	(	const MgtAddBaResponseHeader *	respHdr,
		Mac48Address	recipient
	)

Event handler when an ADDBA response is received.

Parameters

respHdr	ADDBA response header.
recipient	address of the recipient.

Definition at line 1226 of file qos-txop.cc.

References ns3::MgtAddBaResponseHeader::GetStatusCode(), ns3::MgtAddBaResponseHeader::GetTid(), ns3::StatusCode::IsSuccess(), m_baManager, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::OriginatorBlockAckAgreement::PENDING, and RestartAccessIfNeeded().

◆ GotBlockAck()

void ns3::QosTxop::GotBlockAck	(	const CtrlBAckResponseHeader *	blockAck,
		Mac48Address	recipient,
		double	rxSnr,
		WifiMode	txMode,
		double	dataSnr
	)

virtual

Event handler when a Block ACK is received.

Parameters

blockAck	block ack.
recipient	address of the recipient.
rxSnr	SNR of the block ack itself.
txMode	wifi mode.
dataSnr	reported data SNR from the peer.

Reimplemented from ns3::Txop.

Definition at line 1256 of file qos-txop.cc.

References ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), ns3::Txop::GetTxopLimit(), ns3::WifiMode::GetUniqueName(), HasTxop(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), ns3::WifiMacHeader::IsQosData(), ns3::Time::IsStrictlyPositive(), m_backoffTrace, m_baManager, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, m_cwTrace, ns3::Txop::m_rng, m_startTxop, ns3::Txop::m_txOkCallback, m_txopTrace, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Txop::ResetCw(), RestartAccessIfNeeded(), and ns3::Txop::StartBackoffNow().

◆ GotDelBaFrame()

void ns3::QosTxop::GotDelBaFrame	(	const MgtDelBaHeader *	delBaHdr,
		Mac48Address	recipient
	)

Event handler when a DELBA frame is received.

Parameters

delBaHdr	DELBA header.
recipient	address of the recipient.

Definition at line 1248 of file qos-txop.cc.

References ns3::MgtDelBaHeader::GetTid(), m_baManager, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

◆ HasTxop()

bool ns3::QosTxop::HasTxop ( void ) const

privatevirtual

Check if the station has TXOP granted for the next MPDU.

Returns: true if the station has TXOP granted for the next MPDU, false otherwise.

Reimplemented from ns3::Txop.

Definition at line 895 of file qos-txop.cc.

References ns3::MacLow::CalculateOverallTxTime(), ns3::MacLowTransmissionParameters::DisableAck(), ns3::MacLowTransmissionParameters::EnableAck(), ns3::WifiMacHeader::GetAddr1(), ns3::Txop::GetLow(), ns3::WifiMacHeader::GetQosTid(), ns3::Txop::GetTxopLimit(), GetTxopRemaining(), ns3::WifiMacHeader::IsQosBlockAck(), ns3::WifiMacHeader::IsQosData(), ns3::Time::IsZero(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_currentParams, ns3::Txop::m_queue, and NS_LOG_FUNCTION.

Referenced by GotAck(), and GotBlockAck().

◆ IsLastFragment()

bool ns3::QosTxop::IsLastFragment ( void ) const

privatevirtual

Check if the current fragment is the last fragment.

Returns: true if the current fragment is the last fragment, false otherwise.

Reimplemented from ns3::Txop.

Definition at line 1126 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), GetNTxopFragment(), ns3::WifiRemoteStationManager::IsLastFragment(), IsTxopFragmentation(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_fragmentNumber, and ns3::Txop::m_stationManager.

Referenced by GetFragmentPacket(), and NotifyAccessGranted().

◆ IsQosTxop()

bool ns3::QosTxop::IsQosTxop ( ) const

virtual

Check for QoS TXOP.

Returns: true if QoS TXOP.

Reimplemented from ns3::Txop.

Definition at line 1563 of file qos-txop.cc.

◆ IsTxopFragmentation()

bool ns3::QosTxop::IsTxopFragmentation ( ) const

private

Check if the current packet is fragmented because of an exceeded TXOP duration.

Returns: true if the current packet is fragmented because of an exceeded TXOP duration, false otherwise

Definition at line 974 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiRemoteStationManager::GetFragmentSize(), GetTxopFragmentSize(), ns3::Txop::GetTxopLimit(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_stationManager, and ns3::WifiRemoteStationManager::NeedFragmentation().

Referenced by GetFragmentOffset(), GetFragmentSize(), GetNextFragmentSize(), and IsLastFragment().

◆ MapDestAddressForAggregation()

Mac48Address ns3::QosTxop::MapDestAddressForAggregation ( const WifiMacHeader & hdr )

This functions are used only to correctly set destination address in A-MSDU subframes.

If aggregating sta is a STA (in an infrastructured network): DA = Address3 If aggregating sta is an AP DA = Address1

Parameters

hdr	Wi-Fi header

Returns: Mac48Address

Definition at line 1186 of file qos-txop.cc.

References ns3::ADHOC_STA, ns3::AP, ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetAddr3(), GetTypeOfStation(), and NS_LOG_FUNCTION.

Referenced by NotifyAccessGranted().

◆ MapSrcAddressForAggregation()

Mac48Address ns3::QosTxop::MapSrcAddressForAggregation ( const WifiMacHeader & hdr )

This functions are used only to correctly set source address in A-MSDU subframes.

If aggregating sta is a STA (in an infrastructured network): SA = Address2 If aggregating sta is an AP SA = Address3

Parameters

hdr	Wi-Fi header

Returns: Mac48Address

Definition at line 1170 of file qos-txop.cc.

References ns3::ADHOC_STA, ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetAddr3(), GetTypeOfStation(), NS_LOG_FUNCTION, and ns3::STA.

Referenced by NotifyAccessGranted().

◆ MissedAck()

void ns3::QosTxop::MissedAck ( void )

virtual

Event handler when an ACK is missed.

Reimplemented from ns3::Txop.

Definition at line 556 of file qos-txop.cc.

Referenced by AmpduAggregationTest::DoRun().

◆ MissedBlockAck()

void ns3::QosTxop::MissedBlockAck ( uint8_t nMpdus )

virtual

Event handler when a Block ACK timeout has occurred.

Parameters

nMpdus number of MPDUs sent in the A-MPDU transmission that results in a Block ACK timeout.

Reimplemented from ns3::Txop.

Definition at line 622 of file qos-txop.cc.

◆ MissedCts()

void ns3::QosTxop::MissedCts ( void )

virtual

Event handler when a CTS timeout has occurred.

Reimplemented from ns3::Txop.

Definition at line 427 of file qos-txop.cc.

◆ NeedBarRetransmission()

bool ns3::QosTxop::NeedBarRetransmission ( void )

Check if Block ACK Request should be re-transmitted.

Returns: true if BAR should be re-transmitted, false otherwise.

Definition at line 785 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::CtrlBAckResponseHeader::GetTidInfo(), ns3::WifiMacHeader::IsBlockAck(), ns3::WifiMacHeader::IsBlockAckReq(), ns3::WifiMacHeader::IsQosData(), m_baManager, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, and ns3::Packet::PeekHeader().

Referenced by MissedBlockAck().

◆ NeedFragmentation()

bool ns3::QosTxop::NeedFragmentation ( void ) const

virtual

Check if the current packet should be fragmented.

Returns: true if the current packet should be fragmented, false otherwise.

Reimplemented from ns3::Txop.

Definition at line 950 of file qos-txop.cc.

References ns3::MacLow::CalculateOverallTxTime(), ns3::WifiMacHeader::GetAddr1(), GetAmpduExist(), GetBaAgreementExists(), ns3::Txop::GetLow(), ns3::MpduAggregator::GetMaxAmpduSize(), GetMpduAggregator(), ns3::Packet::GetSize(), ns3::GetTid(), ns3::Txop::GetTxopLimit(), ns3::WifiRemoteStationManager::HasHeSupported(), ns3::WifiRemoteStationManager::HasHtSupported(), ns3::WifiRemoteStationManager::HasVhtSupported(), ns3::WifiMacHeader::IsData(), ns3::WifiMacHeader::IsQosData(), ns3::Time::IsStrictlyPositive(), ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, ns3::Txop::m_currentParams, ns3::Txop::m_stationManager, ns3::WifiRemoteStationManager::NeedFragmentation(), and NS_LOG_FUNCTION.

Referenced by NotifyAccessGranted().

◆ NotifyAccessGranted()

void ns3::QosTxop::NotifyAccessGranted ( void )

virtual

Notify the EDCAF that access has been granted.

Reimplemented from ns3::Txop.

Definition at line 166 of file qos-txop.cc.

◆ NotifyCollision()

void ns3::QosTxop::NotifyCollision ( void )

virtual

Notify the EDCAF that collision has occurred.

Reimplemented from ns3::Txop.

Definition at line 418 of file qos-txop.cc.

References ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), m_backoffTrace, ns3::Txop::m_rng, NS_LOG_FUNCTION, RestartAccessIfNeeded(), and ns3::Txop::StartBackoffNow().

◆ NotifyInternalCollision()

void ns3::QosTxop::NotifyInternalCollision ( void )

virtual

Notify the EDCAF that internal collision has occurred.

Reimplemented from ns3::Txop.

Definition at line 328 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::Mac48Address::GetBroadcast(), ns3::Txop::GetCw(), ns3::RandomVariableStream::GetInteger(), ns3::Packet::GetSize(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), m_backoffTrace, m_baManager, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, m_isAccessRequestedForRts, ns3::Txop::m_queue, ns3::Txop::m_rng, ns3::Txop::m_stationManager, ns3::Txop::m_txFailedCallback, ns3::Txop::NeedDataRetransmission(), ns3::Txop::NeedRtsRetransmission(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::WifiRemoteStationManager::ReportDataFailed(), ns3::WifiRemoteStationManager::ReportFinalDataFailed(), ns3::WifiRemoteStationManager::ReportFinalRtsFailed(), ns3::WifiRemoteStationManager::ReportRtsFailed(), ns3::Txop::ResetCw(), RestartAccessIfNeeded(), ns3::Txop::StartBackoffNow(), and ns3::Txop::UpdateFailedCw().

◆ PeekNextRetransmitPacket()

Ptr< const Packet > ns3::QosTxop::PeekNextRetransmitPacket	(	WifiMacHeader &	header,
		uint8_t	tid,
		Time *	timestamp
	)

Peek in retransmit queue and get the next packet without removing it from the queue.

Parameters

header	Wi-Fi header.
tid	traffic ID.
timestamp	the timestamp.

Returns: the packet.

Definition at line 154 of file qos-txop.cc.

References m_baManager.

◆ PeekNextSequenceNumberFor()

uint16_t ns3::QosTxop::PeekNextSequenceNumberFor ( WifiMacHeader * hdr )

Return the next sequence number for the Traffic ID and destination, but do not pick it (i.e.

the current sequence number remains unchanged).

Parameters

hdr	Wi-Fi header.

Returns: the next sequence number.

Definition at line 148 of file qos-txop.cc.

References ns3::Txop::m_txMiddle, and ns3::MacTxMiddle::PeekNextSequenceNumberFor().

◆ PushFront()

void ns3::QosTxop::PushFront	(	Ptr< const Packet >	packet,
		const WifiMacHeader &	hdr
	)

Parameters

packet	packet to send.
hdr	header of packet to send.

Store the packet in the front of the internal queue until it can be sent safely.

Definition at line 1216 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::Txop::m_queue, ns3::Txop::m_stationManager, NS_LOG_FUNCTION, ns3::WifiRemoteStationManager::PrepareForQueue(), and StartAccessIfNeeded().

Referenced by SendDelbaFrame().

◆ RemoveRetransmitPacket()

void ns3::QosTxop::RemoveRetransmitPacket	(	uint8_t	tid,
		Mac48Address	recipient,
		uint16_t	seqnumber
	)

Remove a packet after you peek in the retransmit queue and get it.

Parameters

tid	traffic ID of the packet to be removed.
recipient	address of the recipient the packet was intended for.
seqnumber	sequence number of the packet to be removed.

Definition at line 160 of file qos-txop.cc.

References m_baManager.

◆ RestartAccessIfNeeded()

void ns3::QosTxop::RestartAccessIfNeeded ( void )

virtual

Restart access request if needed.

Reimplemented from ns3::Txop.

Definition at line 708 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::MacLow::GetDataTxVector(), ns3::Txop::IsAccessRequested(), m_baManager, ns3::Txop::m_channelAccessManager, ns3::Txop::m_currentHdr, ns3::Txop::m_currentPacket, m_currentPacketTimestamp, m_isAccessRequestedForRts, ns3::Txop::m_low, m_qosBlockedDestinations, ns3::Txop::m_queue, ns3::Txop::m_stationManager, ns3::WifiRemoteStationManager::NeedRts(), NS_LOG_FUNCTION, and ns3::ChannelAccessManager::RequestAccess().

Referenced by GotAck(), GotAddBaResponse(), GotBlockAck(), MissedAck(), MissedBlockAck(), MissedCts(), NotifyCollision(), and NotifyInternalCollision().

◆ SendAddBaRequest()

void ns3::QosTxop::SendAddBaRequest	(	Mac48Address	recipient,
		uint8_t	tid,
		uint16_t	startSeq,
		uint16_t	timeout,
		bool	immediateBAck
	)

private

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

Parameters

recipient	address of the recipient.
tid	traffic ID.
startSeq	starting sequence.
timeout	timeout value.
immediateBAck	flag to indicate whether immediate block ack is used.

Definition at line 1435 of file qos-txop.cc.

Referenced by SetupBlockAckIfNeeded().

◆ SendBlockAckRequest()

void ns3::QosTxop::SendBlockAckRequest ( const Bar & bar )

private

After that all packets, for which a block ack agreement was established, have been transmitted, we have to send a block ack request.

Parameters

bar	the block ack request.

Definition at line 1362 of file qos-txop.cc.

Referenced by NotifyAccessGranted(), and StartNextPacket().

◆ SendDelbaFrame()

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

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

Parameters

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

Definition at line 1496 of file qos-txop.cc.

References ns3::Packet::AddHeader(), ns3::WifiActionHeader::BLOCK_ACK, ns3::WifiActionHeader::BLOCK_ACK_DELBA, ns3::WifiActionHeader::ActionValue::blockAck, ns3::MacLow::DestroyBlockAckAgreement(), ns3::MacLow::GetAddress(), m_baManager, ns3::Txop::m_low, NS_LOG_FUNCTION, PushFront(), ns3::WifiActionHeader::SetAction(), ns3::WifiMacHeader::SetAddr1(), ns3::WifiMacHeader::SetAddr2(), ns3::WifiMacHeader::SetAddr3(), ns3::MgtDelBaHeader::SetByOriginator(), ns3::MgtDelBaHeader::SetByRecipient(), ns3::WifiMacHeader::SetDsNotFrom(), ns3::WifiMacHeader::SetDsNotTo(), ns3::MgtDelBaHeader::SetTid(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_MGT_ACTION.

Referenced by CompleteConfig(), ns3::MacLow::CreateBlockAckAgreement(), and ns3::MacLow::ResetBlockAckInactivityTimerIfNeeded().

◆ SetAccessCategory()

void ns3::QosTxop::SetAccessCategory ( AcIndex ac )

Set the access category of this EDCAF.

Parameters

ac	access category.

Definition at line 1163 of file qos-txop.cc.

References m_ac, and NS_LOG_FUNCTION.

Referenced by AmpduAggregationTest::DoRun(), and TwoLevelAggregationTest::DoRun().

◆ SetAmpduExist()

void ns3::QosTxop::SetAmpduExist	(	Mac48Address	dest,
		bool	enableAmpdu
	)

Set indication whether A-MPDU is used to transmit data to a peer station.

Parameters

dest	address of peer station.
enableAmpdu	flag whether A-MPDU is used or not.

Definition at line 1309 of file qos-txop.cc.

References m_aMpduEnabled, and NS_LOG_FUNCTION.

◆ SetBlockAckInactivityTimeout()

void ns3::QosTxop::SetBlockAckInactivityTimeout ( uint16_t timeout )

Set the Block Ack inactivity timeout.

Parameters

timeout the Block Ack inactivity timeout.

Definition at line 1421 of file qos-txop.cc.

References m_blockAckInactivityTimeout, NS_LOG_FUNCTION, and timeout.

Referenced by ns3::RegularWifiMac::SetBeBlockAckInactivityTimeout(), ns3::RegularWifiMac::SetBkBlockAckInactivityTimeout(), ns3::RegularWifiMac::SetViBlockAckInactivityTimeout(), and ns3::RegularWifiMac::SetVoBlockAckInactivityTimeout().

◆ SetBlockAckThreshold()

void ns3::QosTxop::SetBlockAckThreshold ( uint8_t threshold )

Set threshold for block ACK mechanism.

If number of packets in the queue reaches the threshold, block ACK mechanism is used.

Parameters

threshold block ack threshold value.

Definition at line 1413 of file qos-txop.cc.

References m_baManager, m_blockAckThreshold, and NS_LOG_FUNCTION.

Referenced by ns3::RegularWifiMac::SetBeBlockAckThreshold(), ns3::RegularWifiMac::SetBkBlockAckThreshold(), ns3::RegularWifiMac::SetViBlockAckThreshold(), and ns3::RegularWifiMac::SetVoBlockAckThreshold().

◆ SetMpduAggregator()

void ns3::QosTxop::SetMpduAggregator ( const Ptr< MpduAggregator > aggr )

Set the aggregator used to construct A-MPDU subframes.

Parameters

aggr	pointer to the MPDU aggregator.

Definition at line 1209 of file qos-txop.cc.

References m_mpduAggregator, and NS_LOG_FUNCTION.

Referenced by AmpduAggregationTest::DoRun(), and TwoLevelAggregationTest::DoRun().

◆ SetMsduAggregator()

void ns3::QosTxop::SetMsduAggregator ( const Ptr< MsduAggregator > aggr )

Set the aggregator used to construct A-MSDU subframes.

Parameters

aggr	pointer to the MSDU aggregator.

Definition at line 1202 of file qos-txop.cc.

References m_msduAggregator, and NS_LOG_FUNCTION.

Referenced by TwoLevelAggregationTest::DoRun().

◆ SetTypeOfStation()

void ns3::QosTxop::SetTypeOfStation ( TypeOfStation type )

Set type of station with the given type.

Parameters

type	the type of station.

Definition at line 129 of file qos-txop.cc.

References m_typeOfStation, and NS_LOG_FUNCTION.

◆ SetupBlockAckIfNeeded()

bool ns3::QosTxop::SetupBlockAckIfNeeded ( )

private

If number of packets in the queue reaches m_blockAckThreshold value, an ADDBA Request frame is sent to destination in order to setup a block ack.

Returns: true if we tried to set up block ACK, false otherwise.

Definition at line 1342 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), GetBlockAckThreshold(), ns3::MpduAggregator::GetMaxAmpduSize(), ns3::MacTxMiddle::GetNextSeqNumberByTidAndAddress(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiRemoteStationManager::HasHeSupported(), ns3::WifiRemoteStationManager::HasVhtSupported(), m_blockAckInactivityTimeout, ns3::Txop::m_currentHdr, m_mpduAggregator, ns3::Txop::m_queue, ns3::Txop::m_stationManager, ns3::Txop::m_txMiddle, NS_LOG_FUNCTION, and SendAddBaRequest().

Referenced by NotifyAccessGranted().

◆ SetWifiRemoteStationManager()

void ns3::QosTxop::SetWifiRemoteStationManager ( const Ptr< WifiRemoteStationManager > remoteManager )

virtual

Set WifiRemoteStationsManager this QosTxop is associated to.

Parameters

remoteManager WifiRemoteStationManager.

Reimplemented from ns3::Txop.

Definition at line 121 of file qos-txop.cc.

References m_baManager, ns3::Txop::m_stationManager, NS_LOG_FUNCTION, and ns3::Txop::SetWifiRemoteStationManager().

Referenced by AmpduAggregationTest::DoRun(), and TwoLevelAggregationTest::DoRun().

◆ StartAccessIfNeeded()

void ns3::QosTxop::StartAccessIfNeeded ( void )

virtual

Request access from DCF manager if needed.

Reimplemented from ns3::Txop.

Definition at line 749 of file qos-txop.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::MacLow::GetDataTxVector(), ns3::Txop::IsAccessRequested(), m_baManager, ns3::Txop::m_channelAccessManager, ns3::Txop::m_currentPacket, m_currentPacketTimestamp, m_isAccessRequestedForRts, ns3::Txop::m_low, m_qosBlockedDestinations, ns3::Txop::m_queue, ns3::Txop::m_stationManager, ns3::WifiRemoteStationManager::NeedRts(), and ns3::ChannelAccessManager::RequestAccess().

Referenced by EndTxNoAck(), and PushFront().

◆ StartNextPacket()

void ns3::QosTxop::StartNextPacket ( void )

virtual

Start transmission for the next packet if allowed by the TxopLimit.

Reimplemented from ns3::Txop.

Definition at line 812 of file qos-txop.cc.

◆ VerifyBlockAck()

void ns3::QosTxop::VerifyBlockAck ( void )

private

Verifies if dequeued packet has to be transmitted with ack policy Block Ack.

This happens if an established block ack agreement exists with the receiver.

Definition at line 1281 of file qos-txop.cc.

References ns3::WifiMacHeader::BLOCK_ACK, ns3::OriginatorBlockAckAgreement::ESTABLISHED, ns3::WifiMacHeader::GetAddr1(), ns3::MpduAggregator::GetMaxAmpduSize(), GetMpduAggregator(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::OriginatorBlockAckAgreement::INACTIVE, m_baManager, ns3::Txop::m_currentHdr, NS_LOG_FUNCTION, and ns3::WifiMacHeader::SetQosAckPolicy().

Referenced by NotifyAccessGranted(), and StartNextPacket().

Friends And Related Function Documentation

◆ ::AmpduAggregationTest

friend class ::AmpduAggregationTest

friend

Allow test cases to access private members.

Definition at line 94 of file qos-txop.h.

◆ AggregationCapableTransmissionListener

friend class AggregationCapableTransmissionListener

friend

allow AggregationCapableTransmissionListener class access

Definition at line 425 of file qos-txop.h.

Member Data Documentation

◆ m_ac

AcIndex ns3::QosTxop::m_ac

private

the access category

Definition at line 540 of file qos-txop.h.

Referenced by CompleteConfig(), and SetAccessCategory().

◆ m_aMpduEnabled

std::map<Mac48Address, bool> ns3::QosTxop::m_aMpduEnabled

list containing flags whether A-MPDU is enabled for a given destination address

Definition at line 96 of file qos-txop.h.

Referenced by GetAmpduExist(), and SetAmpduExist().

◆ m_backoffTrace

TracedValue<uint32_t> ns3::QosTxop::m_backoffTrace

private

backoff trace value

Definition at line 555 of file qos-txop.h.

Referenced by DoInitialize(), EndTxNoAck(), GetTypeId(), GotAck(), GotBlockAck(), MissedAck(), MissedBlockAck(), MissedCts(), NotifyCollision(), and NotifyInternalCollision().

◆ m_baManager

Ptr<BlockAckManager> ns3::QosTxop::m_baManager

private

◆ m_blockAckInactivityTimeout

uint16_t ns3::QosTxop::m_blockAckInactivityTimeout

private

the Block ACK inactivity timeout

Definition at line 549 of file qos-txop.h.

Referenced by SetBlockAckInactivityTimeout(), and SetupBlockAckIfNeeded().

◆ m_blockAckThreshold

uint8_t ns3::QosTxop::m_blockAckThreshold

private

the Block ACK threshold

Definition at line 546 of file qos-txop.h.

Referenced by GetBlockAckThreshold(), and SetBlockAckThreshold().

◆ m_blockAckType

BlockAckType ns3::QosTxop::m_blockAckType

private

the Block ACK type

Definition at line 547 of file qos-txop.h.

Referenced by NotifyAccessGranted(), QosTxop(), and SendBlockAckRequest().

◆ m_currentBar

Bar ns3::QosTxop::m_currentBar

private

the current BAR

Definition at line 550 of file qos-txop.h.

Referenced by MissedAck(), MissedBlockAck(), MissedCts(), NotifyAccessGranted(), and StartNextPacket().

◆ m_currentIsFragmented

bool ns3::QosTxop::m_currentIsFragmented

private

flag whether current packet is fragmented

Definition at line 553 of file qos-txop.h.

Referenced by GotAck(), and NotifyAccessGranted().

◆ m_currentPacketTimestamp

Time ns3::QosTxop::m_currentPacketTimestamp

private

the current packet timestamp

Definition at line 548 of file qos-txop.h.

Referenced by CompleteTx(), NotifyAccessGranted(), RestartAccessIfNeeded(), and StartAccessIfNeeded().

◆ m_cwTrace

TracedValue<uint32_t> ns3::QosTxop::m_cwTrace

private

CW trace value.

Definition at line 556 of file qos-txop.h.

Referenced by DoInitialize(), EndTxNoAck(), GetTypeId(), GotAck(), GotBlockAck(), MissedAck(), MissedBlockAck(), and MissedCts().

◆ m_isAccessRequestedForRts

bool ns3::QosTxop::m_isAccessRequestedForRts

private

flag whether access is requested to transmit a RTS frame

Definition at line 552 of file qos-txop.h.

Referenced by NotifyAccessGranted(), NotifyInternalCollision(), RestartAccessIfNeeded(), and StartAccessIfNeeded().

◆ m_mpduAggregator

Ptr<MpduAggregator> ns3::QosTxop::m_mpduAggregator

private

A-MPDU aggregator.

Definition at line 542 of file qos-txop.h.

Referenced by DoDispose(), GetMpduAggregator(), SetMpduAggregator(), and SetupBlockAckIfNeeded().

◆ m_msduAggregator

Ptr<MsduAggregator> ns3::QosTxop::m_msduAggregator

private

A-MSDU aggregator.

Definition at line 541 of file qos-txop.h.

Referenced by DoDispose(), GetMsduAggregator(), NotifyAccessGranted(), and SetMsduAggregator().

◆ m_qosBlockedDestinations

Ptr<QosBlockedDestinations> ns3::QosTxop::m_qosBlockedDestinations

private

QOS blocked destinations.

Definition at line 544 of file qos-txop.h.

Referenced by DoDispose(), NotifyAccessGranted(), QosTxop(), RestartAccessIfNeeded(), and StartAccessIfNeeded().

◆ m_startTxop

Time ns3::QosTxop::m_startTxop

private

the start TXOP time

Definition at line 551 of file qos-txop.h.

Referenced by EndTxNoAck(), GetTxopRemaining(), GotAck(), GotBlockAck(), NotifyAccessGranted(), and StartNextPacket().

◆ m_txopTrace

TracedCallback<Time, Time> ns3::QosTxop::m_txopTrace

private

TXOP trace callback.

Definition at line 557 of file qos-txop.h.

Referenced by EndTxNoAck(), GetTypeId(), GotAck(), GotBlockAck(), and StartNextPacket().

◆ m_typeOfStation

TypeOfStation ns3::QosTxop::m_typeOfStation

private

the type of station

Definition at line 543 of file qos-txop.h.

Referenced by GetTypeOfStation(), and SetTypeOfStation().

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

src/wifi/model/qos-txop.h
src/wifi/model/qos-txop.cc

Public Member Functions

Static Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Config Paths

Attributes defined in parent class ns3::Txop

TraceSources

Constructor & Destructor Documentation

◆ QosTxop()

◆ ~QosTxop()

Member Function Documentation

◆ BaTxFailed()

◆ BaTxOk()

◆ CompleteAmpduTransfer()

◆ CompleteConfig()

◆ CompleteMpduTx()

◆ CompleteTx()

◆ DoDispose()

◆ DoInitialize()

◆ EndTxNoAck()

◆ GetAmpduExist()

◆ GetBaAgreementExists()

◆ GetBlockAckThreshold()

◆ GetFragmentOffset()

◆ GetFragmentPacket()

◆ GetFragmentSize()

◆ GetMpduAggregator()

◆ GetMsduAggregator()

◆ GetNextFragmentSize()

◆ GetNextSequenceNumberFor()

◆ GetNextTxopFragmentSize()

◆ GetNTxopFragment()

◆ GetTxopFragmentOffset()

◆ GetTxopFragmentSize()

◆ GetTxopRemaining()

◆ GetTypeId()

◆ GetTypeOfStation()

◆ GotAck()

◆ GotAddBaResponse()

◆ GotBlockAck()

◆ GotDelBaFrame()

◆ HasTxop()

◆ IsLastFragment()

◆ IsQosTxop()

◆ IsTxopFragmentation()

◆ MapDestAddressForAggregation()

◆ MapSrcAddressForAggregation()

◆ MissedAck()

◆ MissedBlockAck()

◆ MissedCts()

◆ NeedBarRetransmission()

◆ NeedFragmentation()

◆ NotifyAccessGranted()

◆ NotifyCollision()

◆ NotifyInternalCollision()

◆ PeekNextRetransmitPacket()

◆ PeekNextSequenceNumberFor()

◆ PushFront()

◆ RemoveRetransmitPacket()

◆ RestartAccessIfNeeded()

◆ SendAddBaRequest()

◆ SendBlockAckRequest()

◆ SendDelbaFrame()

◆ SetAccessCategory()

◆ SetAmpduExist()

◆ SetBlockAckInactivityTimeout()

◆ SetBlockAckThreshold()

◆ SetMpduAggregator()

◆ SetMsduAggregator()

◆ SetTypeOfStation()

◆ SetupBlockAckIfNeeded()

◆ SetWifiRemoteStationManager()

◆ StartAccessIfNeeded()

◆ StartNextPacket()

◆ VerifyBlockAck()

Friends And Related Function Documentation