A Discrete-Event Network Simulator
API
ns3::RttEstimator Class Referenceabstract

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 &r)
 Copy constructor. More...
 
virtual ~RttEstimator ()
 
virtual Ptr< RttEstimatorCopy () const =0
 Copy object (including current internal state) More...
 
Time GetEstimate (void) const
 gets the RTT estimate. More...
 
virtual TypeId GetInstanceTypeId (void) const
 Get the most derived TypeId for this Object. More...
 
uint32_t GetNSamples (void) const
 gets the number of samples used in the estimates More...
 
Time GetVariation (void) const
 Note that this is not a formal statistical variance; it has the the same units as the estimate. More...
 
virtual void Measurement (Time t)=0
 Add a new measurement to the estimator. More...
 
virtual void Reset ()
 Resets the estimation to its initial state. 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...
 
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< ObjectGetObject () const
 
template<>
Ptr< ObjectGetObject (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...
 
SimpleRefCountoperator= (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::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...
 

Protected Attributes

Time m_estimatedRtt
 Current estimate. More...
 
Time m_estimatedVariation
 Current estimate variation. More...
 
uint32_t m_nSamples
 Number of samples. More...
 

Private Attributes

Time m_initialEstimatedRtt
 Initial RTT estimation. More...
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 Copy an Object. More...
 
virtual void DoDispose (void)
 Destructor implementation. 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...
 

Detailed Description

Base class for all RTT Estimators.


Introspection did not find any typical Config paths.

The RTT Estimator class computes an estimate of the round trip time observed in a series of Time measurements. The estimate is provided in the form of an estimate and a sample variation. Subclasses can implement different algorithms to provide values for the estimate and variation.


Attributes

  • InitialEstimation: Initial RTT estimate
    • Set with class: ns3::TimeValue
    • Underlying type: Time -9.22337e+18ns:+9.22337e+18ns
    • Initial value: +1e+09ns
    • Flags: construct write read

No TraceSources are defined for this type.
Size of this type is 64 bytes (on a 64-bit architecture).

Definition at line 43 of file rtt-estimator.h.

Constructor & Destructor Documentation

◆ RttEstimator() [1/2]

ns3::RttEstimator::RttEstimator ( )

◆ RttEstimator() [2/2]

ns3::RttEstimator::RttEstimator ( const RttEstimator r)

Copy constructor.

Parameters
rthe object to copy

Definition at line 87 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

◆ ~RttEstimator()

ns3::RttEstimator::~RttEstimator ( )
virtual

Definition at line 97 of file rtt-estimator.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

◆ Copy()

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

Copy object (including current internal state)

Returns
a copy of itself

Implemented in ns3::RttMeanDeviation.

◆ GetEstimate()

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

gets the RTT estimate.

Returns
The RTT estimate.

Definition at line 60 of file rtt-estimator.cc.

References m_estimatedRtt.

Referenced by RttEstimatorTestCase::CheckValues(), RttEstimatorTestCase::CheckValuesWithTolerance(), RttEstimatorTestCase::DoRun(), TcpRttEstimationTest::Tx(), and TcpTimeRtoTest::Tx().

+ Here is the caller graph for this function:

◆ GetInstanceTypeId()

TypeId ns3::RttEstimator::GetInstanceTypeId ( void  ) const
virtual

Get the most derived TypeId for this Object.

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

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

Reimplemented from ns3::Object.

Reimplemented in ns3::RttMeanDeviation.

Definition at line 103 of file rtt-estimator.cc.

References GetTypeId().

+ Here is the call graph for this function:

◆ GetNSamples()

uint32_t ns3::RttEstimator::GetNSamples ( void  ) const

gets the number of samples used in the estimates

Returns
the number of samples used in the estimates

Definition at line 118 of file rtt-estimator.cc.

References m_nSamples.

Referenced by RttEstimatorTestCase::DoRun().

+ Here is the caller graph for this function:

◆ GetTypeId()

TypeId ns3::RttEstimator::GetTypeId ( void  )
static

Get the type ID.

Returns
the object TypeId

Definition at line 45 of file rtt-estimator.cc.

References m_initialEstimatedRtt, ns3::MakeTimeAccessor(), ns3::MakeTimeChecker(), ns3::Seconds(), and ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ GetVariation()

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

Note that this is not a formal statistical variance; it has the the same units as the estimate.

Mean deviation or standard deviation are example quantities that could be provided here.

gets the RTT estimate variation.

Returns
The RTT estimate variation.

Definition at line 66 of file rtt-estimator.cc.

References m_estimatedVariation.

Referenced by RttEstimatorTestCase::CheckValues(), RttEstimatorTestCase::CheckValuesWithTolerance(), RttEstimatorTestCase::DoRun(), and TcpTimeRtoTest::Tx().

+ Here is the caller graph for this function:

◆ Measurement()

virtual void ns3::RttEstimator::Measurement ( Time  t)
pure virtual

Add a new measurement to the estimator.

Pure virtual function.

Parameters
tthe new RTT measure.

Implemented in ns3::RttMeanDeviation.

Referenced by RttEstimatorTestCase::CheckValues(), and RttEstimatorTestCase::CheckValuesWithTolerance().

+ Here is the caller graph for this function:

◆ Reset()

void ns3::RttEstimator::Reset ( void  )
virtual

Resets the estimation to its initial state.

Reimplemented in ns3::RttMeanDeviation.

Definition at line 108 of file rtt-estimator.cc.

References m_estimatedRtt, m_estimatedVariation, m_initialEstimatedRtt, m_nSamples, and NS_LOG_FUNCTION.

Referenced by ns3::RttMeanDeviation::Reset().

+ Here is the caller graph for this function:

Member Data Documentation

◆ m_estimatedRtt

Time ns3::RttEstimator::m_estimatedRtt
protected

◆ m_estimatedVariation

Time ns3::RttEstimator::m_estimatedVariation
protected

◆ m_initialEstimatedRtt

Time ns3::RttEstimator::m_initialEstimatedRtt
private

Initial RTT estimation.

Definition at line 102 of file rtt-estimator.h.

Referenced by GetTypeId(), Reset(), and RttEstimator().

◆ m_nSamples

uint32_t ns3::RttEstimator::m_nSamples
protected

Number of samples.

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

Referenced by GetNSamples(), ns3::RttMeanDeviation::Measurement(), and Reset().


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