This module specializes the TrafficGeneratorBase module to provide a Constant Bit Rate (CBR) background traffic generator. This generator produces fixed-size packets at regular intervals in either downlink or uplink bands, or both.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
TrafficGeneratorBase	simple module	This module provides the basic functions and parameters that a traffic generator submodule (implementing the ITrafficGenerator interface) can utilize. It enables the configuration of parameters such as the starting time of the traffic, the size and inter-generation timing of packets, the rate of retransmissions, and so on. Custom background traffic generators can be implemented by extending this module.

Parameters

Name	Type	Default value	Description
computeAvgInterference	bool
enablePeriodicCqiUpdate	bool
useProbabilisticCqi	bool
backgroundTrafficManagerModule	string	"^.^.manager"
startTimeDl	double	-1s
startTimeUl	double	-1s
headerLen	int	33B
txPower	double	26dBm
fbPeriod	int	6tti
periodDl	double	uniform(10ms,50ms)
periodUl	double	uniform(10ms,50ms)
packetSizeDl	int	intuniform(20B,100B)
packetSizeUl	int	intuniform(20B,100B)
rtxRateDl	double	0.1
rtxDelayDl	double	0.006s
rtxRateUl	double	0.1
rtxDelayUl	double	0.006s
cqiMeanDl	double	15	these values are only considered when periodicCqi == false && computeAvgInterference == false
cqiMeanUl	double	15
cqiStddevDl	double	0
cqiStddevUl	double	0

Properties

Name	Value	Description
display	i=block/source
class	TrafficGeneratorCbr

Signals

Name	Type	Unit	Description
bgMeasuredSinrDl			statistics
bgAverageCqiDl
bgMeasuredSinrUl
bgAverageCqiUl
bgHarqErrorRateUl
bgHarqErrorRateDl

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
bgMeasuredSinrDl	Average DL SINR for background UEs	bgMeasuredSinrDl	mean, count, vector
bgAverageCqiDl	Average DL CQI for background UEs	bgAverageCqiDl	mean, count, vector
bgMeasuredSinrUl	Average UL SINR for background UEs	bgMeasuredSinrUl	mean, count, vector
bgAverageCqiUl	Average UL CQI for background UEs	bgAverageCqiUl	mean, count, vector
bgHarqErrorRateUl	Average UL HARQ error rate for background UEs	bgHarqErrorRateUl	mean, count, vector
bgHarqErrorRateDl	Average DL HARQ error rate for background UEs	bgHarqErrorRateDl	mean, count, vector

Source code

//
// This module specializes the ~TrafficGeneratorBase module to provide a
// Constant Bit Rate (CBR) background traffic generator. This generator
// produces fixed-size packets at regular intervals in either downlink
// or uplink bands, or both.
//
simple TrafficGeneratorCbr extends TrafficGeneratorBase
{
    parameters:
        @display("i=block/source");
        @class("TrafficGeneratorCbr");
}

File: src/stack/backgroundTrafficGenerator/generators/TrafficGeneratorCbr.ned

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