Manage a set of ns3::TxopHandle a set of independent ns3::Txop, each of which represents a single DCF within a MAC stack. More...

#include "channel-access-manager.h"

Inheritance diagram for ns3::ChannelAccessManager:

Collaboration diagram for ns3::ChannelAccessManager:

Public Member Functions
	ChannelAccessManager ()

virtual	~ChannelAccessManager ()

void	Add (Ptr< Txop > txop)

bool	IsBusy (void) const
	Check if the device is busy sending or receiving, or NAV or CCA busy. More...

bool	NeedBackoffUponAccess (Ptr< Txop > txop)
	Determine if a new backoff needs to be generated when a packet is queued for transmission. More...

void	NotifyAckTimeoutResetNow (void)
	Notify that ack timer has reset. More...

void	NotifyAckTimeoutStartNow (Time duration)
	Notify that ack timer has started for the given duration. More...

void	NotifyCtsTimeoutResetNow (void)
	Notify that CTS timer has reset. More...

void	NotifyCtsTimeoutStartNow (Time duration)
	Notify that CTS timer has started for the given duration. More...

void	NotifyMaybeCcaBusyStartNow (Time duration)

void	NotifyNavResetNow (Time duration)

void	NotifyNavStartNow (Time duration)

void	NotifyOffNow (void)
	Notify the Txop that the device has been put in off mode. More...

void	NotifyOnNow (void)
	Notify the Txop that the device has been resumed from off mode. More...

void	NotifyRxEndErrorNow (void)
	Notify the Txop that a packet reception was just completed unsuccessfully. More...

void	NotifyRxEndOkNow (void)
	Notify the Txop that a packet reception was just completed successfully. More...

void	NotifyRxStartNow (Time duration)

void	NotifySleepNow (void)
	Notify the Txop that the device has been put in sleep mode. More...

void	NotifySwitchingStartNow (Time duration)

void	NotifyTxStartNow (Time duration)

void	NotifyWakeupNow (void)
	Notify the Txop that the device has been resumed from sleep mode. More...

void	RemovePhyListener (Ptr< WifiPhy > phy)
	Remove current registered listener for PHY events. More...

void	RequestAccess (Ptr< Txop > txop, bool isCfPeriod=false)

void	SetupLow (Ptr< MacLow > low)
	Set up listener for MacLow events. More...

void	SetupPhyListener (Ptr< WifiPhy > phy)
	Set up listener for PHY events. More...

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

virtual	~Object ()
	Destructor. More...

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

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

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

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

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

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

template<>
Ptr< Object >	GetObject () const

template<>
Ptr< Object >	GetObject (TypeId tid) const

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...

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

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

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

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

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

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

Private Types
typedef std::vector< Ptr< Txop > >	Txops
	typedef for a vector of Txops More...

Private Member Functions
void	AccessTimeout (void)
	Called when access timeout should occur (e.g. More...

void	DoGrantDcfAccess (void)
	Grant access to Txop using DCF/EDCF contention rules. More...

void	DoGrantPcfAccess (Ptr< Txop > txop)
	Grant access to Txop using PCF preemption. More...

void	DoRestartAccessTimeoutIfNeeded (void)

Time	GetAccessGrantStart (bool ignoreNav=false) const
	Access will never be granted to the medium before the time returned by this method. More...

Time	GetBackoffEndFor (Ptr< Txop > txop)
	Return the time when the backoff procedure ended (or will ended) for the given Txop. More...

Time	GetBackoffStartFor (Ptr< Txop > txop)
	Return the time when the backoff procedure started for the given Txop. More...

virtual Time	GetEifsNoDifs (void) const
	Return the EIFS duration minus a DIFS. More...

virtual Time	GetSifs (void) const
	Return the Short Interframe Space (SIFS) for this PHY. More...

virtual Time	GetSlot (void) const
	Return the slot duration for this PHY. More...

Time	MostRecent (std::initializer_list< Time > list) const
	Return the most recent time. More...

void	UpdateBackoff (void)
	Update backoff slots for all Txops. More...

Private Attributes
EventId	m_accessTimeout
	the access timeout ID More...

Time	m_eifsNoDifs
	EIFS no DIFS time. More...

Time	m_lastAckTimeoutEnd
	the last Ack timeout end time More...

Time	m_lastBusyDuration
	the last busy duration time More...

Time	m_lastBusyStart
	the last busy start time More...

Time	m_lastCtsTimeoutEnd
	the last CTS timeout end time More...

Time	m_lastNavDuration
	the last NAV duration time More...

Time	m_lastNavStart
	the last NAV start time More...

Time	m_lastRxDuration
	the last receive duration time More...

bool	m_lastRxReceivedOk
	the last receive OK More...

Time	m_lastRxStart
	the last receive start time More...

Time	m_lastSwitchingDuration
	the last switching duration time More...

Time	m_lastSwitchingStart
	the last switching start time More...

Time	m_lastTxDuration
	the last transmit duration time More...

Time	m_lastTxStart
	the last transmit start time More...

bool	m_off
	flag whether it is in off state More...

Ptr< WifiPhy >	m_phy
	pointer to the PHY More...

PhyListener *	m_phyListener
	the PHY listener More...

Time	m_sifs
	the SIFS time More...

bool	m_sleeping
	flag whether it is in sleeping state More...

Time	m_slot
	the slot time More...

Txops	m_txops
	the vector of managed Txops More...

Additional Inherited Members
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...

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

Manage a set of ns3::Txop

Handle a set of independent ns3::Txop, each of which represents a single DCF within a MAC stack.

Each ns3::Txop has a priority implicitly associated with it (the priority is determined when the ns3::Txop is added to the ChannelAccessManager: the first Txop to be added gets the highest priority, the second, the second highest priority, and so on.) which is used to handle "internal" collisions. i.e., when two local Txop are expected to get access to the medium at the same time, the highest priority local Txop wins access to the medium and the other Txop suffers a "internal" collision.

Definition at line 51 of file channel-access-manager.h.

Member Typedef Documentation

◆ Txops

typedef std::vector<Ptr<Txop> > ns3::ChannelAccessManager::Txops

private

typedef for a vector of Txops

Definition at line 292 of file channel-access-manager.h.

Constructor & Destructor Documentation

◆ ChannelAccessManager()

ns3::ChannelAccessManager::ChannelAccessManager ( )

Definition at line 101 of file channel-access-manager.cc.

References NS_LOG_FUNCTION.

◆ ~ChannelAccessManager()

ns3::ChannelAccessManager::~ChannelAccessManager ( )

virtual

Definition at line 122 of file channel-access-manager.cc.

References m_phyListener, and NS_LOG_FUNCTION.

Member Function Documentation

◆ AccessTimeout()

void ns3::ChannelAccessManager::AccessTimeout ( void )

private

Called when access timeout should occur (e.g.

backoff procedure expired).

Definition at line 392 of file channel-access-manager.cc.

References DoGrantDcfAccess(), DoRestartAccessTimeoutIfNeeded(), NS_LOG_FUNCTION, and UpdateBackoff().

Referenced by DoRestartAccessTimeoutIfNeeded().

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◆ Add()

void ns3::ChannelAccessManager::Add ( Ptr< Txop > txop )

Parameters

txop	a new Txop.

The ChannelAccessManager does not take ownership of this pointer so, the callee must make sure that the Txop pointer will stay valid as long as the ChannelAccessManager is valid. Note that the order in which Txop objects are added to a ChannelAccessManager matters: the first Txop added has the highest priority, the second Txop added, has the second highest priority, etc.

Definition at line 190 of file channel-access-manager.cc.

References m_txops, and NS_LOG_FUNCTION.

Referenced by ns3::Txop::SetChannelAccessManager().

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◆ DoDispose()

void ns3::ChannelAccessManager::DoDispose ( void )

protectedvirtual

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 130 of file channel-access-manager.cc.

References m_phy, m_txops, and NS_LOG_FUNCTION.

◆ DoGrantDcfAccess()

void ns3::ChannelAccessManager::DoGrantDcfAccess ( void )

private

Grant access to Txop using DCF/EDCF contention rules.

This is the first Txop we find with an expired backoff and which needs access to the medium. i.e., it has data to send.

all other Txops with a lower priority whose backoff has expired and which needed access to the medium must be notified that we did get an internal collision.

Now, we notify all of these changes in one go. It is necessary to perform first the calculations of which Txops are colliding and then only apply the changes because applying the changes through notification could change the global state of the manager, and, thus, could change the result of the calculations.

Definition at line 338 of file channel-access-manager.cc.

References GetBackoffEndFor(), ns3::Txop::GetBackoffSlots(), ns3::Txop::IsAccessRequested(), m_txops, ns3::Txop::NotifyAccessGranted(), ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by AccessTimeout(), and RequestAccess().

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◆ DoGrantPcfAccess()

void ns3::ChannelAccessManager::DoGrantPcfAccess ( Ptr< Txop > txop )

private

Grant access to Txop using PCF preemption.

Parameters

txop the Txop

Definition at line 332 of file channel-access-manager.cc.

References ns3::Txop::NotifyAccessGranted().

Referenced by RequestAccess().

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◆ DoRestartAccessTimeoutIfNeeded()

void ns3::ChannelAccessManager::DoRestartAccessTimeoutIfNeeded ( void )

private

Is there a Txop which needs to access the medium, and, if there is one, how many slots for AIFS+backoff does it require ?

Definition at line 503 of file channel-access-manager.cc.

References AccessTimeout(), ns3::EventId::Cancel(), GetBackoffEndFor(), ns3::Simulator::GetDelayLeft(), ns3::Simulator::GetMaximumSimulationTime(), ns3::EventId::IsExpired(), ns3::EventId::IsRunning(), m_accessTimeout, m_txops, min, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

Referenced by AccessTimeout(), NotifyAckTimeoutResetNow(), NotifyCtsTimeoutResetNow(), NotifyNavResetNow(), and RequestAccess().

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◆ GetAccessGrantStart()

Time ns3::ChannelAccessManager::GetAccessGrantStart ( bool ignoreNav = false ) const

private

Access will never be granted to the medium before the time returned by this method.

Parameters

ignoreNav flag whether NAV should be ignored

Returns: the absolute time at which access could start to be granted

Definition at line 401 of file channel-access-manager.cc.

References GetEifsNoDifs(), GetSifs(), m_lastAckTimeoutEnd, m_lastBusyDuration, m_lastBusyStart, m_lastCtsTimeoutEnd, m_lastNavDuration, m_lastNavStart, m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, m_lastSwitchingDuration, m_lastSwitchingStart, m_lastTxDuration, m_lastTxStart, MostRecent(), ns3::Simulator::Now(), NS_LOG_FUNCTION, and NS_LOG_INFO.

Referenced by GetBackoffStartFor(), and RequestAccess().

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◆ GetBackoffEndFor()

Time ns3::ChannelAccessManager::GetBackoffEndFor ( Ptr< Txop > txop )

private

Return the time when the backoff procedure ended (or will ended) for the given Txop.

Parameters

txop the Txop

Returns: the time when the backoff procedure ended (or will ended)

Definition at line 458 of file channel-access-manager.cc.

References ns3::Time::As(), ns3::Txop::GetBackoffSlots(), GetBackoffStartFor(), GetSlot(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Time::US.

Referenced by DoGrantDcfAccess(), and DoRestartAccessTimeoutIfNeeded().

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◆ GetBackoffStartFor()

Time ns3::ChannelAccessManager::GetBackoffStartFor ( Ptr< Txop > txop )

private

Return the time when the backoff procedure started for the given Txop.

Parameters

txop the Txop

Returns: the time when the backoff procedure started

Definition at line 447 of file channel-access-manager.cc.

References ns3::Time::As(), GetAccessGrantStart(), ns3::Txop::GetAifsn(), ns3::Txop::GetBackoffStart(), GetSlot(), MostRecent(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Time::US.

Referenced by GetBackoffEndFor(), and UpdateBackoff().

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◆ GetEifsNoDifs()

Time ns3::ChannelAccessManager::GetEifsNoDifs ( void ) const

privatevirtual

Return the EIFS duration minus a DIFS.

Returns: the EIFS duration minus a DIFS

Reimplemented in ChannelAccessManagerStub.

Definition at line 184 of file channel-access-manager.cc.

References ns3::WifiPhy::GetAckTxTime(), ns3::WifiPhy::GetSifs(), and m_phy.

Referenced by GetAccessGrantStart().

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◆ GetSifs()

Time ns3::ChannelAccessManager::GetSifs ( void ) const

privatevirtual

Return the Short Interframe Space (SIFS) for this PHY.

Returns: the SIFS duration

Reimplemented in ChannelAccessManagerStub.

Definition at line 178 of file channel-access-manager.cc.

References ns3::WifiPhy::GetSifs(), and m_phy.

Referenced by GetAccessGrantStart(), NeedBackoffUponAccess(), and NotifyTxStartNow().

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◆ GetSlot()

Time ns3::ChannelAccessManager::GetSlot ( void ) const

privatevirtual

Return the slot duration for this PHY.

Returns: the slot duration

Reimplemented in ChannelAccessManagerStub.

Definition at line 172 of file channel-access-manager.cc.

References ns3::WifiPhy::GetSlot(), and m_phy.

Referenced by GetBackoffEndFor(), GetBackoffStartFor(), NeedBackoffUponAccess(), RequestAccess(), and UpdateBackoff().

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◆ IsBusy()

bool ns3::ChannelAccessManager::IsBusy ( void ) const

Check if the device is busy sending or receiving, or NAV or CCA busy.

Returns: true if the device is busy, false otherwise

Definition at line 204 of file channel-access-manager.cc.

References m_lastBusyDuration, m_lastBusyStart, m_lastNavDuration, m_lastNavStart, m_lastRxDuration, m_lastRxStart, m_lastTxDuration, m_lastTxStart, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

Referenced by ns3::Txop::CanStartNextPolling(), and NeedBackoffUponAccess().

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◆ MostRecent()

Time ns3::ChannelAccessManager::MostRecent ( std::initializer_list< Time > list ) const

private

Return the most recent time.

Parameters

list	the initializer list including the times to compare

Returns: the most recent time

Definition at line 197 of file channel-access-manager.cc.

References list, and NS_ASSERT.

Referenced by GetAccessGrantStart(), GetBackoffStartFor(), and RequestAccess().

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◆ NeedBackoffUponAccess()

bool ns3::ChannelAccessManager::NeedBackoffUponAccess ( Ptr< Txop > txop )

Determine if a new backoff needs to be generated when a packet is queued for transmission.

Parameters

txop	the Txop requesting to generate a backoff

Returns: true if backoff needs to be generated, false otherwise

Definition at line 234 of file channel-access-manager.cc.

References ns3::Txop::GetAifsn(), ns3::Txop::GetBackoffSlots(), ns3::Txop::GetLow(), GetSifs(), GetSlot(), ns3::Txop::HasFramesToTransmit(), IsBusy(), ns3::Txop::IsQosTxop(), m_off, m_sleeping, ns3::Simulator::Now(), NS_LOG_FUNCTION, ns3::Seconds(), UpdateBackoff(), and ns3::Txop::UpdateBackoffSlotsNow().

Referenced by ns3::Txop::Queue().

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◆ NotifyAckTimeoutResetNow()

void ns3::ChannelAccessManager::NotifyAckTimeoutResetNow ( void )

Notify that ack timer has reset.

Definition at line 781 of file channel-access-manager.cc.

References DoRestartAccessTimeoutIfNeeded(), m_lastAckTimeoutEnd, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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◆ NotifyAckTimeoutStartNow()

void ns3::ChannelAccessManager::NotifyAckTimeoutStartNow ( Time duration )

Notify that ack timer has started for the given duration.

Parameters

duration the duration of the timer

Definition at line 773 of file channel-access-manager.cc.

References m_lastAckTimeoutEnd, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

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◆ NotifyCtsTimeoutResetNow()

void ns3::ChannelAccessManager::NotifyCtsTimeoutResetNow ( void )

Notify that CTS timer has reset.

Definition at line 796 of file channel-access-manager.cc.

References DoRestartAccessTimeoutIfNeeded(), m_lastCtsTimeoutEnd, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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◆ NotifyCtsTimeoutStartNow()

void ns3::ChannelAccessManager::NotifyCtsTimeoutStartNow ( Time duration )

Notify that CTS timer has started for the given duration.

Parameters

duration the duration of the timer

Definition at line 789 of file channel-access-manager.cc.

References m_lastCtsTimeoutEnd, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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◆ NotifyMaybeCcaBusyStartNow()

void ns3::ChannelAccessManager::NotifyMaybeCcaBusyStartNow ( Time duration )

Parameters

duration expected duration of CCA busy period

Notify the Txop that a CCA busy period has just started.

Definition at line 599 of file channel-access-manager.cc.

References m_lastBusyDuration, m_lastBusyStart, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateBackoff().

Referenced by ns3::OcbWifiMac::MakeVirtualBusy(), and ns3::PhyListener::NotifyMaybeCcaBusyStart().

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◆ NotifyNavResetNow()

void ns3::ChannelAccessManager::NotifyNavResetNow ( Time duration )

Parameters

duration the value of the received NAV.

Called at end of RX

If the NAV reset indicates an end-of-NAV which is earlier than the previous end-of-NAV, the expected end of backoff might be later than previously thought so, we might need to restart a new access timeout.

Definition at line 740 of file channel-access-manager.cc.

References DoRestartAccessTimeoutIfNeeded(), m_lastNavDuration, m_lastNavStart, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateBackoff().

Referenced by ns3::MeshWifiInterfaceMac::SwitchFrequencyChannel().

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◆ NotifyNavStartNow()

void ns3::ChannelAccessManager::NotifyNavStartNow ( Time duration )

Parameters

duration the value of the received NAV.

Called at end of RX

Definition at line 757 of file channel-access-manager.cc.

References m_lastNavDuration, m_lastNavStart, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateBackoff().

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◆ NotifyOffNow()

void ns3::ChannelAccessManager::NotifyOffNow ( void )

Notify the Txop that the device has been put in off mode.

Definition at line 684 of file channel-access-manager.cc.

References ns3::EventId::Cancel(), ns3::EventId::IsRunning(), m_accessTimeout, m_off, m_txops, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifyOff().

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◆ NotifyOnNow()

void ns3::ChannelAccessManager::NotifyOnNow ( void )

Notify the Txop that the device has been resumed from off mode.

Definition at line 721 of file channel-access-manager.cc.

References m_off, m_txops, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifyOn().

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◆ NotifyRxEndErrorNow()

void ns3::ChannelAccessManager::NotifyRxEndErrorNow ( void )

Notify the Txop that a packet reception was just completed unsuccessfully.

Definition at line 563 of file channel-access-manager.cc.

References m_lastBusyDuration, m_lastBusyStart, m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifyRxEndError().

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◆ NotifyRxEndOkNow()

void ns3::ChannelAccessManager::NotifyRxEndOkNow ( void )

Notify the Txop that a packet reception was just completed successfully.

Definition at line 554 of file channel-access-manager.cc.

References m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifyRxEndOk().

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◆ NotifyRxStartNow()

void ns3::ChannelAccessManager::NotifyRxStartNow ( Time duration )

Parameters

duration expected duration of reception

Notify the Txop that a packet reception started for the expected duration.

Definition at line 543 of file channel-access-manager.cc.

References m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateBackoff().

Referenced by ns3::PhyListener::NotifyRxStart().

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◆ NotifySleepNow()

void ns3::ChannelAccessManager::NotifySleepNow ( void )

Notify the Txop that the device has been put in sleep mode.

Definition at line 666 of file channel-access-manager.cc.

References ns3::EventId::Cancel(), ns3::EventId::IsRunning(), m_accessTimeout, m_sleeping, m_txops, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifySleep(), and ns3::OcbWifiMac::Suspend().

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◆ NotifySwitchingStartNow()

void ns3::ChannelAccessManager::NotifySwitchingStartNow ( Time duration )

Parameters

duration expected duration of channel switching period

Notify the Txop that a channel switching period has just started. During switching state, new packets can be enqueued in Txop/QosTxop but they won't access to the medium until the end of the channel switching.

Definition at line 609 of file channel-access-manager.cc.

References ns3::EventId::Cancel(), ns3::EventId::IsRunning(), m_accessTimeout, m_lastAckTimeoutEnd, m_lastBusyDuration, m_lastBusyStart, m_lastCtsTimeoutEnd, m_lastNavDuration, m_lastNavStart, m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, m_lastSwitchingDuration, m_lastSwitchingStart, m_lastTxDuration, m_lastTxStart, m_txops, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifySwitchingStart(), and ns3::OcbWifiMac::Reset().

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◆ NotifyTxStartNow()

void ns3::ChannelAccessManager::NotifyTxStartNow ( Time duration )

Parameters

duration expected duration of transmission

Notify the Txop that a packet transmission was just started and is expected to last for the specified duration.

Definition at line 579 of file channel-access-manager.cc.

References GetSifs(), m_lastRxDuration, m_lastRxReceivedOk, m_lastRxStart, m_lastTxDuration, m_lastTxStart, ns3::Simulator::Now(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateBackoff().

Referenced by ns3::PhyListener::NotifyTxStart().

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◆ NotifyWakeupNow()

void ns3::ChannelAccessManager::NotifyWakeupNow ( void )

Notify the Txop that the device has been resumed from sleep mode.

Definition at line 702 of file channel-access-manager.cc.

References m_sleeping, m_txops, ns3::Simulator::Now(), NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::PhyListener::NotifyWakeup(), and ns3::OcbWifiMac::Resume().

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◆ RemovePhyListener()

void ns3::ChannelAccessManager::RemovePhyListener ( Ptr< WifiPhy > phy )

Remove current registered listener for PHY events.

Parameters

phy	the WifiPhy to listen to

Definition at line 152 of file channel-access-manager.cc.

References m_phy, m_phyListener, NS_LOG_FUNCTION, and third::phy.

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

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◆ RequestAccess()

void ns3::ChannelAccessManager::RequestAccess	(	Ptr< Txop >	txop,
		bool	isCfPeriod = `false`
	)

Parameters

txop	a Txop
isCfPeriod	flag whether it is called during the CF period

Notify the ChannelAccessManager that a specific Txop needs access to the medium. The ChannelAccessManager is then responsible for starting an access timer and, invoking Txop::DoNotifyAccessGranted when the access is granted if it ever gets granted.

Definition at line 290 of file channel-access-manager.cc.

References DoGrantDcfAccess(), DoGrantPcfAccess(), DoRestartAccessTimeoutIfNeeded(), GetAccessGrantStart(), ns3::Txop::GetAifsn(), ns3::Txop::GetBackoffStart(), GetSlot(), ns3::Txop::IsAccessRequested(), ns3::Txop::IsQosTxop(), m_accessTimeout, m_off, m_phy, m_sleeping, MostRecent(), ns3::Txop::NotifyAccessRequested(), ns3::WifiPhy::NotifyChannelAccessRequested(), ns3::Simulator::Now(), NS_ASSERT, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), UpdateBackoff(), and ns3::Txop::UpdateBackoffSlotsNow().

Referenced by ns3::QosTxop::RestartAccessIfNeeded(), ns3::Txop::RestartAccessIfNeeded(), ns3::Txop::SendCfFrame(), ns3::QosTxop::StartAccessIfNeeded(), and ns3::Txop::StartAccessIfNeeded().

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◆ SetupLow()

void ns3::ChannelAccessManager::SetupLow ( Ptr< MacLow > low )

Set up listener for MacLow events.

Parameters

low	the MacLow to listen to

Definition at line 165 of file channel-access-manager.cc.

References NS_LOG_FUNCTION.

Referenced by ns3::OcbWifiMac::EnableForWave(), and ns3::RegularWifiMac::RegularWifiMac().

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◆ SetupPhyListener()

void ns3::ChannelAccessManager::SetupPhyListener ( Ptr< WifiPhy > phy )

Set up listener for PHY events.

Parameters

phy	the WifiPhy to listen to

Definition at line 142 of file channel-access-manager.cc.

References m_phy, m_phyListener, NS_ASSERT, NS_LOG_FUNCTION, and third::phy.

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

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◆ UpdateBackoff()

void ns3::ChannelAccessManager::UpdateBackoff ( void )

private

Update backoff slots for all Txops.

Definition at line 468 of file channel-access-manager.cc.

References GetBackoffStartFor(), GetSlot(), m_txops, min, sample-rng-plot::n, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by AccessTimeout(), NeedBackoffUponAccess(), NotifyMaybeCcaBusyStartNow(), NotifyNavResetNow(), NotifyNavStartNow(), NotifyRxStartNow(), NotifyTxStartNow(), and RequestAccess().

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Member Data Documentation

◆ m_accessTimeout

EventId ns3::ChannelAccessManager::m_accessTimeout

private

the access timeout ID

Definition at line 311 of file channel-access-manager.h.

Referenced by DoRestartAccessTimeoutIfNeeded(), NotifyOffNow(), NotifySleepNow(), NotifySwitchingStartNow(), and RequestAccess().

◆ m_eifsNoDifs

Time ns3::ChannelAccessManager::m_eifsNoDifs

private

EIFS no DIFS time.

Definition at line 310 of file channel-access-manager.h.

◆ m_lastAckTimeoutEnd

Time ns3::ChannelAccessManager::m_lastAckTimeoutEnd

private

the last Ack timeout end time

Definition at line 295 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), NotifyAckTimeoutResetNow(), NotifyAckTimeoutStartNow(), and NotifySwitchingStartNow().

◆ m_lastBusyDuration

Time ns3::ChannelAccessManager::m_lastBusyDuration

private

the last busy duration time

Definition at line 305 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyMaybeCcaBusyStartNow(), NotifyRxEndErrorNow(), and NotifySwitchingStartNow().

◆ m_lastBusyStart

Time ns3::ChannelAccessManager::m_lastBusyStart

private

the last busy start time

Definition at line 304 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyMaybeCcaBusyStartNow(), NotifyRxEndErrorNow(), and NotifySwitchingStartNow().

◆ m_lastCtsTimeoutEnd

Time ns3::ChannelAccessManager::m_lastCtsTimeoutEnd

private

the last CTS timeout end time

Definition at line 296 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), NotifyCtsTimeoutResetNow(), NotifyCtsTimeoutStartNow(), and NotifySwitchingStartNow().

◆ m_lastNavDuration

Time ns3::ChannelAccessManager::m_lastNavDuration

private

the last NAV duration time

Definition at line 298 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyNavResetNow(), NotifyNavStartNow(), and NotifySwitchingStartNow().

◆ m_lastNavStart

Time ns3::ChannelAccessManager::m_lastNavStart

private

the last NAV start time

Definition at line 297 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyNavResetNow(), NotifyNavStartNow(), and NotifySwitchingStartNow().

◆ m_lastRxDuration

Time ns3::ChannelAccessManager::m_lastRxDuration

private

the last receive duration time

Definition at line 300 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyRxEndErrorNow(), NotifyRxEndOkNow(), NotifyRxStartNow(), NotifySwitchingStartNow(), and NotifyTxStartNow().

◆ m_lastRxReceivedOk

bool ns3::ChannelAccessManager::m_lastRxReceivedOk

private

the last receive OK

Definition at line 301 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), NotifyRxEndErrorNow(), NotifyRxEndOkNow(), NotifyRxStartNow(), NotifySwitchingStartNow(), and NotifyTxStartNow().

◆ m_lastRxStart

Time ns3::ChannelAccessManager::m_lastRxStart

private

the last receive start time

Definition at line 299 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifyRxEndErrorNow(), NotifyRxEndOkNow(), NotifyRxStartNow(), NotifySwitchingStartNow(), and NotifyTxStartNow().

◆ m_lastSwitchingDuration

Time ns3::ChannelAccessManager::m_lastSwitchingDuration

private

the last switching duration time

Definition at line 307 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), and NotifySwitchingStartNow().

◆ m_lastSwitchingStart

Time ns3::ChannelAccessManager::m_lastSwitchingStart

private

the last switching start time

Definition at line 306 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), and NotifySwitchingStartNow().

◆ m_lastTxDuration

Time ns3::ChannelAccessManager::m_lastTxDuration

private

the last transmit duration time

Definition at line 303 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifySwitchingStartNow(), and NotifyTxStartNow().

◆ m_lastTxStart

Time ns3::ChannelAccessManager::m_lastTxStart

private

the last transmit start time

Definition at line 302 of file channel-access-manager.h.

Referenced by GetAccessGrantStart(), IsBusy(), NotifySwitchingStartNow(), and NotifyTxStartNow().

◆ m_off

bool ns3::ChannelAccessManager::m_off

private

flag whether it is in off state

Definition at line 309 of file channel-access-manager.h.

Referenced by NeedBackoffUponAccess(), NotifyOffNow(), NotifyOnNow(), and RequestAccess().

◆ m_phy

Ptr<WifiPhy> ns3::ChannelAccessManager::m_phy

private

pointer to the PHY

Definition at line 315 of file channel-access-manager.h.

Referenced by DoDispose(), GetEifsNoDifs(), GetSifs(), GetSlot(), RemovePhyListener(), RequestAccess(), and SetupPhyListener().

◆ m_phyListener

PhyListener* ns3::ChannelAccessManager::m_phyListener

private

the PHY listener

Definition at line 314 of file channel-access-manager.h.

Referenced by RemovePhyListener(), SetupPhyListener(), and ~ChannelAccessManager().

◆ m_sifs

Time ns3::ChannelAccessManager::m_sifs

private

the SIFS time

Definition at line 313 of file channel-access-manager.h.

◆ m_sleeping

bool ns3::ChannelAccessManager::m_sleeping

private

flag whether it is in sleeping state

Definition at line 308 of file channel-access-manager.h.

Referenced by NeedBackoffUponAccess(), NotifySleepNow(), NotifyWakeupNow(), and RequestAccess().

◆ m_slot

Time ns3::ChannelAccessManager::m_slot

private

the slot time

Definition at line 312 of file channel-access-manager.h.

◆ m_txops

Txops ns3::ChannelAccessManager::m_txops

private

the vector of managed Txops

Definition at line 294 of file channel-access-manager.h.

Referenced by Add(), DoDispose(), DoGrantDcfAccess(), DoRestartAccessTimeoutIfNeeded(), NotifyOffNow(), NotifyOnNow(), NotifySleepNow(), NotifySwitchingStartNow(), NotifyWakeupNow(), and UpdateBackoff().

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

src/wifi/model/channel-access-manager.h
src/wifi/model/channel-access-manager.cc

Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Txops

Constructor & Destructor Documentation

◆ ChannelAccessManager()

◆ ~ChannelAccessManager()

Member Function Documentation

◆ AccessTimeout()

◆ Add()

◆ DoDispose()

◆ DoGrantDcfAccess()

◆ DoGrantPcfAccess()

◆ DoRestartAccessTimeoutIfNeeded()

◆ GetAccessGrantStart()

◆ GetBackoffEndFor()

◆ GetBackoffStartFor()

◆ GetEifsNoDifs()

◆ GetSifs()

◆ GetSlot()

◆ IsBusy()

◆ MostRecent()

◆ NeedBackoffUponAccess()

◆ NotifyAckTimeoutResetNow()

◆ NotifyAckTimeoutStartNow()

◆ NotifyCtsTimeoutResetNow()

◆ NotifyCtsTimeoutStartNow()

◆ NotifyMaybeCcaBusyStartNow()

◆ NotifyNavResetNow()

◆ NotifyNavStartNow()

◆ NotifyOffNow()

◆ NotifyOnNow()

◆ NotifyRxEndErrorNow()

◆ NotifyRxEndOkNow()

◆ NotifyRxStartNow()

◆ NotifySleepNow()

◆ NotifySwitchingStartNow()

◆ NotifyTxStartNow()

◆ NotifyWakeupNow()

◆ RemovePhyListener()

◆ RequestAccess()

◆ SetupLow()

◆ SetupPhyListener()

◆ UpdateBackoff()

Member Data Documentation

◆ m_accessTimeout

◆ m_eifsNoDifs

◆ m_lastAckTimeoutEnd

◆ m_lastBusyDuration

◆ m_lastBusyStart

◆ m_lastCtsTimeoutEnd

◆ m_lastNavDuration

◆ m_lastNavStart

◆ m_lastRxDuration

◆ m_lastRxReceivedOk

◆ m_lastRxStart

◆ m_lastSwitchingDuration

◆ m_lastSwitchingStart

◆ m_lastTxDuration

◆ m_lastTxStart

◆ m_off

◆ m_phy

◆ m_phyListener

◆ m_sifs

◆ m_sleeping

◆ m_slot

◆ m_txops