Base class for all RTT Estimators. More...

#include <rtt-estimator.h>

Inheritance diagram for ns3::RttEstimator:

Collaboration diagram for ns3::RttEstimator:

Public Member Functions
	RttEstimator ()
	RttEstimator (const RttEstimator &)
virtual	~RttEstimator ()
virtual Time	AckSeq (SequenceNumber32 ackSeq)
	Note that a particular ack sequence has been received.
virtual void	ClearSent ()
	Clear all history entries.
virtual Ptr< RttEstimator >	Copy () const =0
Time	GetCurrentEstimate (void) const
	gets the current RTT estimate.
Time	GetMinRto (void) const
	Get the Minimum RTO.
virtual void	IncreaseMultiplier ()
	Increase the estimation multiplier up to MaxMultiplier.
virtual void	Measurement (Time t)=0
	Add a new measurement to the estimator. Pure virtual function.
virtual void	Reset ()
	Resets the estimation to its initial state.
virtual void	ResetMultiplier ()
	Resets the estimation multiplier to 1.
virtual Time	RetransmitTimeout ()=0
	Returns the estimated RTO. Pure virtual function.
virtual void	SentSeq (SequenceNumber32 seq, uint32_t size)
	Note that a particular sequence has been sent.
void	SetCurrentEstimate (Time estimate)
	Sets the current RTT estimate (forcefully).
void	SetMinRto (Time minRto)
	Sets the Minimum RTO.
Public Member Functions inherited from ns3::Object
	Object ()
virtual	~Object ()
void	AggregateObject (Ptr< Object > other)
void	Dispose (void)
AggregateIterator	GetAggregateIterator (void) const
virtual TypeId	GetInstanceTypeId (void) const
template<typename T >
Ptr< T >	GetObject (void) const
template<typename T >
Ptr< T >	GetObject (TypeId tid) const
void	Start (void)
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	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
virtual	~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)
	This method returns the TypeId associated to ns3::RttEstimator.

Protected Attributes
Time	m_currentEstimatedRtt
Time	m_minRto
uint16_t	m_multiplier
uint32_t	m_nSamples

Private Attributes
RttHistory_t	m_history
Time	m_initialEstimatedRtt
uint16_t	m_maxMultiplier
SequenceNumber32	m_next

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
virtual void	DoDispose (void)
virtual void	DoStart (void)
virtual void	NotifyNewAggregate (void)

Detailed Description

Base class for all RTT Estimators.

Definition at line 58 of file rtt-estimator.h.

Constructor & Destructor Documentation

ns3::RttEstimator::RttEstimator ( )

Definition at line 107 of file rtt-estimator.cc.

References ns3::ObjectBase::ConstructSelf(), ns3::Time::GetSeconds(), m_currentEstimatedRtt, m_initialEstimatedRtt, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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ns3::RttEstimator::RttEstimator ( const RttEstimator & c )

Definition at line 122 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

ns3::RttEstimator::~RttEstimator ( )

virtual

Definition at line 132 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

Time ns3::RttEstimator::AckSeq ( SequenceNumber32 ackSeq )

virtual

Note that a particular ack sequence has been received.

Parameters

ackSeq the ack sequence number.

Returns: The measured RTT for this ack.

Definition at line 165 of file rtt-estimator.cc.

References ns3::RttHistory::count, m_history, Measurement(), ns3::Now(), NS_LOG_FUNCTION, ResetMultiplier(), ns3::RttHistory::retx, ns3::Seconds(), ns3::RttHistory::seq, and ns3::RttHistory::time.

Referenced by ns3::TcpSocketBase::EstimateRtt().

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void ns3::RttEstimator::ClearSent ( )

virtual

Clear all history entries.

Definition at line 190 of file rtt-estimator.cc.

References m_history, m_next, and NS_LOG_FUNCTION.

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

pure virtual

Implemented in ns3::RttMeanDeviation.

Referenced by ns3::TcpSocketBase::TcpSocketBase().

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Time ns3::RttEstimator::GetCurrentEstimate ( void ) const

gets the current RTT estimate.

Returns: The current RTT estimate.

Definition at line 86 of file rtt-estimator.cc.

References m_currentEstimatedRtt.

Time ns3::RttEstimator::GetMinRto ( void ) const

Get the Minimum RTO.

Returns: The minimum RTO returned by the estimator.

Definition at line 75 of file rtt-estimator.cc.

References m_minRto.

Referenced by GetTypeId().

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TypeId ns3::RttEstimator::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::RttEstimator.

Attributes defined for this type:

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