ITU X.138:1997
ITU X.138:1997 Measurement Of Performance Values For Public Data Networks When Providing International Packet-switched Services Supplies measurements for the performance parameters defined in the X.130-Series Recommendations on PSPDN.
Table of Contents
1Introductionandscope1.1General
1.2Parameterstobemeasured
1.3Accuracyrequirementsofmeasurements
2References
3Abbreviations
4Measurementarchitectures
4.1Generalconsiderationsandmeasurementmethodologies
4.2Performanceparametersandmeasurementarchitectures
4.3Loopbacks
4.4Summaryofmeasurementarchitectures
5Measurementmethodusingcontrolledandmonitoredsource
andcontrolledandmonitoredsink(C.M/C,M)
5.1Generalassumptionsandconstraints
5.2Testdevices
5.3Testsequences
5.4Trialfailuresandrecovery
5.5Matchingpacketlevelreferenceevents
5.6Testingduringserviceoutages
5.7Accesstrial
5.8Datatransfertrial
5.9Disengagementtrial
5.10Estimatingavailabilityparameters
6Methodforsynchronizingequipment
6.1Equipmentsynchronization
AnnexACalculationofpacket-switchednetworkperformance
statistics
A.1Statistics
A.2Statisticalformulas
A.3Throughputmeasurementcorrectionfactor
AnnexBFactorswhichmayaffectmeasuredperformance
B.1Signallingrates
B.2DataLinkLayerwindowsize
B.3PacketLayerwindowsize
B.4Packetlength
B.5Othervirtualconnections
B.6Timeofday
B.7Throughputclass
B.8D-bitusage
B.9Inter-packetgaps
B.10Reportingmultipletestsmadebetweendifferent
locations
AnnexCExamplesofmeasurementuses
C.1Examples
C.2Pairwiseandmultiplecomparisons