ikr.simlib.distributions.continuous.statedep

Class OnOffInfinityDistribution

java.lang.Object

ikr.simlib.distributions.Distribution

ikr.simlib.distributions.continuous.ContinuousDistribution

ikr.simlib.distributions.continuous.statedep.OnOffInfinityDistribution

All Implemented Interfaces:

ReflectionConstructable, ReflectionConstructable3<SimNode,Parameters,RandomNumberGenerator>

public class OnOffInfinityDistribution
extends ContinuousDistribution

On-Off Infinity Model

Meaning:	Superposition of infinitely many on-off sources which allows the modelling of aggregated traffic. Bursts of traffic are generated according to an interarrival time distribution. The burst length distribution represents the length in number of packets which are sent within a burst with the specified intercell time. Usually a negative-exponential distribution is used as burst interarrival time distribution leading to an \(M/G/\infty\) source model.
Description:	Traffic is characterized by burst length distribution burst interarrival time inter cell time \(d\)
Parameters:	(discrete) distribution of the burst length \(X\) in number of packets (continuous) distribution of burst interarrival time \(T_A\) inter-cell time \(d\)
Characteristic values:	mean (packet interarrival time): \(\mu = \frac{E[T_A]}{E[X]}\)
Parser example:	[...].Dist = OnOffInfinityDistribution [...].Dist.BurstLengthDist = Geometric [...].Dist.BurstLengthDist.Mean = 2.3 [...].Dist.BurstIATDist = NegExp [...].Dist.BurstIATDist.Mean = 2.88 [...].Dist.BurstIATDist.InterCellTime = 1.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OnOffInfinityDistribution.BurstData

Field Summary

Fields

Modifier and Type	Field and Description
ContinuousDistribution	burstIATDist
DiscreteDistribution	burstLengthDist
java.util.Queue<OnOffInfinityDistribution.BurstData>	burstList
double	interCellTime

Fields inherited from class ikr.simlib.distributions.Distribution

rng

Fields inherited from interface ikr.simlib.parameters.reflection.ReflectionConstructable

CREATE_INSTANCE_METHOD_NAME

Constructor Summary

Constructors

Constructor and Description
OnOffInfinityDistribution(DiscreteDistribution burstLengthDist, ContinuousDistribution burstIATDist, double interCellTime)
OnOffInfinityDistribution(DiscreteDistribution burstLengthDist, ContinuousDistribution burstIATDist, double interCellTime, RandomNumberGenerator rng)

Method Summary

Methods

Modifier and Type	Method and Description
static OnOffInfinityDistribution	createInstance(SimNode ownNode, Parameters pars, RandomNumberGenerator rng) as required by ReflectionConstructable
double	getCurrentTime()
OnOffInfinityDistribution.BurstData	getNextBurst()
double	next() Create random numbers

Methods inherited from class ikr.simlib.distributions.Distribution

getDefaultRNG, getRandomNumberGenerator, reset

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

burstLengthDist

public final DiscreteDistribution burstLengthDist

burstIATDist

public final ContinuousDistribution burstIATDist

interCellTime

public final double interCellTime

burstList

public final java.util.Queue<OnOffInfinityDistribution.BurstData> burstList

Constructor Detail

OnOffInfinityDistribution

public OnOffInfinityDistribution(DiscreteDistribution burstLengthDist,
                         ContinuousDistribution burstIATDist,
                         double interCellTime,
                         RandomNumberGenerator rng)

OnOffInfinityDistribution

public OnOffInfinityDistribution(DiscreteDistribution burstLengthDist,
                         ContinuousDistribution burstIATDist,
                         double interCellTime)

Method Detail

createInstance

public static OnOffInfinityDistribution createInstance(SimNode ownNode,
                                       Parameters pars,
                                       RandomNumberGenerator rng)

as required by ReflectionConstructable

next

public double next()

Description copied from class: ContinuousDistribution

Create random numbers

Specified by:

next in class ContinuousDistribution

getCurrentTime

public double getCurrentTime()

getNextBurst

public OnOffInfinityDistribution.BurstData getNextBurst()