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

#include <rtt-estimator.h>

Inheritance diagram for ns3::RttMeanDeviation:

Public Member Functions
	RttMeanDeviation (const RttMeanDeviation &)

Ptr< RttEstimator >	Copy () const

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 sthe estimator.

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

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

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

virtual void	ClearSent ()
	Clear all history entries.

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.

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

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
void	AggregateObject (Ptr< Object > other)

void	Dispose (void)

AggregateIterator	GetAggregateIterator (void) const

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

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

void	Initialize (void)

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

uint32_t	GetReferenceCount (void) const

SimpleRefCount &	operator= (const SimpleRefCount &o)

void	Ref (void) const

void	Unref (void) const

Public Member Functions inherited from ns3::ObjectBase
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)

Static Public Member Functions inherited from ns3::RttEstimator
static TypeId	GetTypeId (void)

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId (void)

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

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId (void)

Private Attributes
double	m_gain

Time	m_variance

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

virtual void	DoDispose (void)

virtual void	DoInitialize (void)

virtual void	NotifyNewAggregate (void)

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

virtual void	NotifyConstructionCompleted (void)

Protected Attributes inherited from ns3::RttEstimator
Time	m_currentEstimatedRtt

Time	m_minRto

uint16_t	m_multiplier

uint32_t	m_nSamples

Detailed Description

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

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

Doxygen introspection did not find any typical Config paths.

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: TimeValue
- Underlying type: Time
- Initial value: +1000000000.0ns
- Flags: construct write read
MinRTO: Minimum retransmit timeout value
- Set with class: TimeValue
- Underlying type: Time
- Initial value: +200000000.0ns
- Flags: construct write read

No TraceSources are defined for this type.

Definition at line 164 of file rtt-estimator.h.

Member Function Documentation

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

Sets the estimator Gain.

Parameters

g	the gain, where 0 < g < 1.

Definition at line 320 of file rtt-estimator.cc.

References 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 264 of file rtt-estimator.cc.

void ns3::RttMeanDeviation::Measurement ( Time measure )

virtual

Add a new measurement to the estimator.

Parameters

measure the new RTT measure.

Implements ns3::RttEstimator.

Definition at line 269 of file rtt-estimator.cc.

References ns3::Time::FromDouble(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Time::ToDouble().

Referenced by RttTestCase::DoRun().

Time ns3::RttMeanDeviation::RetransmitTimeout ( )