The "Mean--Deviation" RTT estimator, as discussed by Van Jacobson. More...

#include <rtt-estimator.h>

Inheritance diagram for ns3::RttMeanDeviation:

Collaboration diagram for ns3::RttMeanDeviation:

Public Member Functions
	RttMeanDeviation ()

	RttMeanDeviation (const RttMeanDeviation &r)
	Copy constructor. More...

Ptr< RttEstimator >	Copy () const
	Copy object. More...

void	Gain (double g)
	Sets the estimator Gain. More...

virtual TypeId	GetInstanceTypeId (void) const

void	Measurement (Time measure)
	Add a new measurement to the estimator. More...

void	Reset ()
	Resets the estimator. More...

Time	RetransmitTimeout ()
	Returns the estimated RTO. More...

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

	RttEstimator (const RttEstimator &r)
	Copy constructor. More...

virtual	~RttEstimator ()

virtual Time	AckSeq (SequenceNumber32 ackSeq)
	Note that a particular ack sequence has been received. More...

virtual void	ClearSent ()
	Clear all history entries. More...

Time	GetCurrentEstimate (void) const
	gets the current RTT estimate. More...

Time	GetMinRto (void) const
	Get the Minimum RTO. More...

virtual void	IncreaseMultiplier ()
	Increase the estimation multiplier up to MaxMultiplier. More...

virtual void	ResetMultiplier ()
	Resets the estimation multiplier to 1. More...

virtual void	SentSeq (SequenceNumber32 seq, uint32_t size)
	Note that a particular sequence has been sent. More...

void	SetCurrentEstimate (Time estimate)
	Sets the current RTT estimate (forcefully). More...

void	SetMinRto (Time minRto)
	Sets the Minimum RTO. More...

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

virtual	~Object ()

void	AggregateObject (Ptr< Object > other)

void	Dispose (void)
	Run the DoDispose methods of this object and all the objects aggregated to it. More...

AggregateIterator	GetAggregateIterator (void) const

template<typename T >
Ptr< T >	GetObject (void) const

template<typename T >
Ptr< T >	GetObject (TypeId tid) const

void	Initialize (void)
	This method calls the virtual DoInitialize method on all the objects aggregated to this object. More...

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	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. 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

bool	GetAttributeFailSafe (std::string name, AttributeValue &attribute) const

void	SetAttribute (std::string name, const AttributeValue &value)

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)

Static Public Member Functions
static TypeId	GetTypeId (void)
	Get the type ID. More...

Static Public Member Functions inherited from ns3::RttEstimator
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::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void	Cleanup (void)
	Noop. More...

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

Private Attributes
double	m_gain
	Filter gain. More...

Time	m_variance
	Current variance. More...

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

virtual void	DoDispose (void)
	This method is called by Object::Dispose or by the object's destructor, whichever comes first. More...

virtual void	DoInitialize (void)
	This method is called only once by Object::Initialize. More...

virtual void	NotifyNewAggregate (void)
	This method is invoked whenever two sets of objects are aggregated together. More...

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)

virtual void	NotifyConstructionCompleted (void)
	This method is invoked once all member attributes have been initialized. More...

Protected Attributes inherited from ns3::RttEstimator
Time	m_currentEstimatedRtt
	Current estimate. More...

Time	m_minRto
	minimum value of the timeout More...

uint16_t	m_multiplier
	RTO Multiplier. More...

uint32_t	m_nSamples
	Number of samples. More...

Detailed Description

The "Mean--Deviation" RTT estimator, as discussed by Van Jacobson.

Doxygen introspection did not find any typical Config paths.

This class implements the "Mean--Deviation" RTT estimator, as discussed by Van Jacobson and Michael J. Karels, in "Congestion Avoidance and Control", SIGCOMM 88, Appendix A

Attributes

Gain: Gain used in estimating the RTT, must be 0 < Gain < 1
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 0.1
- Flags: construct write read

Attributes defined in parent class ns3::RttEstimator

MaxMultiplier: Maximum RTO Multiplier
- Set with class: ns3::UintegerValue
- Underlying type: uint16_t 0:65535
- Initial value: 64
- Flags: construct write read
InitialEstimation: Initial RTT estimation
- Set with class: ns3::TimeValue
- Underlying type: Time -9223372036854775808.0ns:+9223372036854775807.0ns
- Initial value: +1000000000.0ns
- Flags: construct write read
MinRTO: Minimum retransmit timeout value
- Set with class: ns3::TimeValue
- Underlying type: Time -9223372036854775808.0ns:+9223372036854775807.0ns
- Initial value: +200000000.0ns
- Flags: construct write read

No TraceSources are defined for this type.

Definition at line 187 of file rtt-estimator.h.

Constructor & Destructor Documentation

ns3::RttMeanDeviation::RttMeanDeviation ( )

Definition at line 253 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

ns3::RttMeanDeviation::RttMeanDeviation ( const RttMeanDeviation & r )

Copy constructor.

Parameters

r	the object to copy

Definition at line 259 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

Ptr< RttEstimator > ns3::RttMeanDeviation::Copy ( ) const

virtual

Copy object.

Returns: a copy of itself

Implements ns3::RttEstimator.

Definition at line 309 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

void ns3::RttMeanDeviation::Gain ( double g )

Sets the estimator Gain.

Parameters

g	the gain, where 0 < g < 1.

Definition at line 322 of file rtt-estimator.cc.

References m_gain, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

TypeId ns3::RttMeanDeviation::GetInstanceTypeId ( void ) const

virtual

Returns: the TypeId associated to the most-derived type of this instance.

This method is typically implemented by ns3::Object::GetInstanceTypeId but some classes which derive from ns3::ObjectBase directly have to implement it themselves.

Reimplemented from ns3::RttEstimator.

Definition at line 266 of file rtt-estimator.cc.

References GetTypeId().

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