32 #include "ns3/double.h" 49 .SetGroupName (
"Internet")
50 .AddAttribute (
"InitialEstimation",
51 "Initial RTT estimate",
89 m_initialEstimatedRtt (c.m_initialEstimatedRtt),
90 m_estimatedRtt (c.m_estimatedRtt),
91 m_estimatedVariation (c.m_estimatedVariation),
92 m_nSamples (c.m_nSamples)
134 .SetGroupName (
"Internet")
136 .AddAttribute (
"Alpha",
137 "Gain used in estimating the RTT, must be 0 <= alpha <= 1",
140 MakeDoubleChecker<double> (0, 1))
141 .AddAttribute (
"Beta",
142 "Gain used in estimating the RTT variation, must be 0 <= beta <= 1",
145 MakeDoubleChecker<double> (0, 1))
156 :
RttEstimator (c), m_alpha (c.m_alpha), m_beta (c.m_beta)
251 if (rttShift && variationShift)
264 NS_LOG_DEBUG (
"(first sample) m_estimatedVariation += " << m);
273 return CopyObject<RttMeanDeviation> (
this);
Simulation virtual time values and global simulation resolution.
Smart pointer class similar to boost::intrusive_ptr.
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by "...
static TypeId GetTypeId(void)
Get the type ID.
virtual TypeId GetInstanceTypeId(void) const
Get the most derived TypeId for this Object.
double m_alpha
Filter gain for average.
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
int64_t GetInteger(void) const
Get the raw time value, in the current resolution unit.
void IntegerUpdate(Time m, uint32_t rttShift, uint32_t variationShift)
Method to update the rtt and variation estimates using integer arithmetic, used when the values of Al...
double GetSeconds(void) const
Get an approximation of the time stored in this instance in the indicated unit.
The "Mean--Deviation" RTT estimator, as discussed by Van Jacobson.
static Time From(const int64x64_t &value)
Create a Time in the current unit.
uint32_t CheckForReciprocalPowerOfTwo(double val) const
Utility function to check for possible conversion of a double value (0 < value < 1) to a reciprocal p...
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Time GetEstimate(void) const
gets the RTT estimate.
double ToDouble(enum Unit unit) const
Get the Time value expressed in a particular unit.
void(* Time)(Time oldValue, Time newValue)
TracedValue callback signature for Time.
static TypeId GetTypeId(void)
Get the type ID.
Time m_initialEstimatedRtt
Initial RTT estimation.
Ptr< const AttributeChecker > MakeTimeChecker(const Time min, const Time max)
Helper to make a Time checker with bounded range.
AttributeValue implementation for Time.
Base class for all RTT Estimators.
List of Attribute name, value and checker triples used to construct Objects.
virtual TypeId GetInstanceTypeId(void) const
Get the most derived TypeId for this Object.
int64x64_t Abs(const int64x64_t &value)
Absolute value.
Time m_estimatedRtt
Current estimate.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
uint32_t GetNSamples(void) const
gets the number of samples used in the estimates
void ConstructSelf(const AttributeConstructionList &attributes)
Complete construction of ObjectBase; invoked by derived classes.
uint32_t m_nSamples
Number of samples.
Time GetVariation(void) const
Note that this is not a formal statistical variance; it has the the same units as the estimate...
Ptr< const AttributeAccessor > MakeTimeAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
virtual void Reset()
Resets the estimation to its initial state.
void Reset()
Resets the estimator.
double m_beta
Filter gain for variation.
void FloatingPointUpdate(Time m)
Method to update the rtt and variation estimates using floating point arithmetic, used when the value...
Ptr< const AttributeAccessor > MakeDoubleAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
static Time FromDouble(double value, enum Unit unit)
Create a Time equal to value in unit unit.
void Measurement(Time measure)
Add a new measurement to the estimator.
#define NS_LOG_DEBUG(msg)
Use NS_LOG to output a message of level LOG_DEBUG.
Time Seconds(double value)
Construct a Time in the indicated unit.
Ptr< RttEstimator > Copy() const
Copy object (including current internal state)
static const double TOLERANCE
Tolerance used to check reciprocal of two numbers.
A base class which provides memory management and object aggregation.
This class can be used to hold variables of floating point type such as 'double' or 'float'...
a unique identifier for an interface.
TypeId SetParent(TypeId tid)
Set the parent TypeId.
Time m_estimatedVariation
Current estimate variation.