SIST EN 302 093-4 V1.1.1:2005

• Abstract:

  Develop part 4 (ATS&PIXIT for the user)

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Mandate: BC-T-338
• Ref Project: ETSI EN 302 093-4 V1.1.1 (2000-09) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Point-to-point multiconnection bearer control specification in a separated call and bearer environment; Part 4 : Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification

SIST EN 302 093-4 V1.1.1:2005 is the Slovenian adoption of ETSI EN 302 093-4 V1.1.1 for Broadband Integrated Services Digital Network (B-ISDN) DSS2 bearer control in a separated call and bearer environment. It specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma used to assess implementations at the TB reference point or coincident SB and TB reference point. It is aimed at test laboratories, test realizers, and implementers who need a conformance test basis for point-to-point multiconnection bearer control.

What does SIST EN 302 093-4 V1.1.1:2005 specify?

SIST EN 302 093-4 V1.1.1:2005 specifies the test material for the DSS2 protocol part defined in EN 302 093-1. Its scope is the user-network interface test area for implementations conforming to the bearer control specification for point-to-point multiconnection calls in pan-European B-ISDN.

The document is organized around the testing framework:

• Clause 4 explains the abstract test method.
• Clause 5 lists untestable test purposes.
• Clause 6 maps test purposes to ATS test cases.
• Clauses 7 to 9 define conformance for PCTR, PIXIT, and the ATS.
• Annex A gives the PCTR proforma.
• Annex B gives the partial PIXIT proforma.
• Annex C gives the ATS in TTCN formats.

Annex	What it covers
Annex A	Protocol Conformance Test Report (PCTR) proforma
Annex B	Partial PIXIT proforma
Annex C	Abstract Test Suite (ATS)

What are the key requirements of SIST EN 302 093-4 V1.1.1:2005?

SIST EN 302 093-4 V1.1.1:2005 requires conformance testing to focus on the network IUT at the user-network interface, not on the whole network. In practice, this means the tests target the DSS2 entity at one interface and use conformance evidence that is tied to that interface.

Test method and test architecture

Clause 4 uses a combination of remote and multi-party test methods. The test system includes one Main Test Component (MTC) and one or more Parallel Test Components (PTC), with points of control and observation at the interfaces under test.

This matters because the MTC controls the PTCs and assigns verdicts only from what is observed at the main interface under test. Events at the operator point are used for control, not for verdicts.

Verdict handling

Clause 4 states that failures in coordination between interfaces do not automatically produce a FAIL verdict. If a message is not seen at the tested interface after the proper stimulus on another interface, the result can be INCONCLUSIVE.

This is important in practice because it tells the tester how to interpret cross-interface behavior and prevents over-reporting failures when only indirect evidence is available.

Mapping and conformance

Clause 6 gives a one-to-one mapping between Test Purposes (TPs) and test case names. Clauses 7 to 9 require the PCTR, PIXIT, and ATS to conform to the templates and equivalence rules described there and in ISO/IEC 9646.

For a buyer or lab, this means the documentation and test artifacts must stay technically aligned with the standard’s annexes and conformance rules.

PIXIT data needed for testing

Annex B asks for practical test information such as the test configuration, timers, and parameter values. It includes the access role under test, management timers such as TAC, TNOAC, and TWAIT, and values related to call association, bearer identifier, broadband bearer capability, called party number, ATM traffic descriptor, and connection identifier.

This matters because a lab cannot run the ATS without knowing the exact setup and parameter values for the IUT and the test environment.

What terms does SIST EN 302 093-4 V1.1.1:2005 define?

• ATS (Abstract Test Suite) - The formal set of abstract test cases used to assess protocol conformance.
• PIXIT (Protocol Implementation eXtra Information for Testing) - Implementation-specific information needed to prepare and run the tests.
• PCTR (Protocol Conformance Test Report) - The report that records the conformance test identification, results, and observations.
• IUT (Implementation Under Test) - The protocol implementation being assessed.
• SUT (System Under Test) - The broader system being tested, including the IUT.
• MTC (Main Test Component) - The test component that controls the test and assigns verdicts from the main interface.
• PTC (Parallel Test Component) - A test component used in parallel to control or stimulate other interfaces.
• PCO (Point of Control and Observation) - The interface point where the test system controls and observes behavior.

Who uses SIST EN 302 093-4 V1.1.1:2005?

SIST EN 302 093-4 V1.1.1:2005 is used by telecommunications test laboratories, conformance test service providers, and vendors implementing DSS2 bearer control for B-ISDN equipment. It is also used by test realizers who build an Executable Test Suite (ExTS) from the ATS.

In practice, users apply it to:

• prepare PIXIT answers,
• run conformance tests,
• produce a PCTR,
• configure test timers and parameters,
• build or verify an MOT and ExTS,
• document whether an IUT meets the specified protocol behavior.

Which standards are used with SIST EN 302 093-4 V1.1.1:2005?

SIST EN 302 093-4 V1.1.1:2005 depends on these companion and reference documents:

• EN 302 093-1 - protocol specification for the bearer control protocol.
• EN 302 093-2 - PICS proforma specification used to state implementation support.
• EN 302 093-3 - Test Suite Structure and Test Purposes (TSS & TP) specification.
• EN 302 092-1 - call control in the separated call and bearer control environment.
• ITU-T Recommendation I.413 - the B-ISDN user-network interface reference for the TB/SB-TB reference point context.
• ISO/IEC 9646-1 to 9646-5 - the conformance testing framework, ATS notation, realization rules, and laboratory requirements.

What does the SIST EN 302 093-4 V1.1.1:2005 document contain?

The document contains the ATS in Tree and Tabular Combined Notation (TTCN), with both TTCN.GR and TTCN.MP representations. Annex C points to the graphical and machine-processable files that accompany the standard.

It also contains proformas for conformance reporting and test setup. Annex A structures a PCTR around identification, IUT status, static and dynamic conformance summaries, and test campaign results, while Annex B structures the PIXIT around the test laboratory, client, SUT, configuration, timers, and parameter values.

Clause 4 includes the test method description and a figure showing the multi-party arrangement with MTC and PTCs. That helps the reader understand how the ATS is intended to be realized and how verdicts are assigned during testing.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.UPLOMHQMDBroadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Point-to-point multiconnection bearer control specification in a separated call and bearer environment; Part 4 : Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 302 093-4 Version 1.1.1SIST EN 302 093-4 V1.1.1:2005en01-januar-2005SIST EN 302 093-4 V1.1.1:2005SLOVENSKI
STANDARD
ETSIEN302093-4V1.1.1(2000-09)EuropeanStandard(Telecommunicationsseries)BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Point-to-pointmulticonnectionbearercontrolspecificationinaseparatedcallandbearerenvironment;Part4:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationSIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)2ReferenceDEN/SPAN-05155-4KeywordsB-ISDN,DSS2,ATS,bearer,control,testing,PIXITETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74AbstractTestMethod.84.1DescriptionofATMused.84.2ConventionsfortestcomponentsandPCOs.85Untestabletestpurposes.96ATStoTPmap.107PCTRconformance.108PIXITconformance.109ATSConformance.10AnnexA(normative):ProtocolConformanceTestReport(PCTR)proforma.11A.1Identificationsummary.11A.1.1Protocolconformancetestreport.11A.1.2IUTidentification.11A.1.3Testingenvironment.11A.1.4Limitsandreservations.12A.1.5Comments.12A.2IUTConformancestatus.12A.3Staticconformancesummary.12A.4Dynamicconformancesummary.13A.5Staticconformancereviewreport.13A.6Testcampaignreport.13A.7Observations.13AnnexB(normative):PartialPIXITproforma.14B.1Identificationsummary.14B.2Abstracttestsuitesummary.14B.3Testlaboratory.14B.4Client(oftheTestLaboratory).15B.5SUT.15B.6Protocolinformation.16B.6.1Protocolidentification.16B.6.2Configurationtobetested.16B.6.3Testmanagementtimers.16B.6.4ParameterValues.17SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)4AnnexC(Normative):AbstractTestSuite(ATS).18C1TheTTCNGraphicalform(TTCN.GR).18C2TheTTCNMachineProcessableform(TTCN.MP).18History.19SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).Thepresentdocumentispart4ofamulti-partstandardcoveringtheDigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Point-to-pointmulticonnectionbearercontrolspecificationinaseparatedcallandbearerenvironment,asidentifiedbelow:Part1:"Protocolspecification";Part2:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specification";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecification".NationaltranspositiondatesDateofadoptionofthisEN:25August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)61ScopeThepresentdocumenttheAbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformafortheTBreferencepointorcoincidentSBandTBreferencepoint(asdefinedinITU-TRecommendationI.413[10])ofimplementationsconformingtothestandardsforthesignallinguser-networklayer3specificationforthebearercontrolprotocolforpoint-to-pointmulticonnectioncallsoftheDigitalSubscriberSignallingSystemNo.two(DSS2)protocolforthepan-EuropeanBroadbandIntegratedServicesDigitalNetwork(B-ISDN),EN302093-1[1].AfurtherpartofthepresentdocumentspecifiestheTestSuiteStructureandTestPurposes(TSS&TP)relatedtothisATSandpartialPIXITproforma.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN302093-1:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Point-to-pointmulticonnectionbearercontrolspecificationinaseparatedcallandbearerenvironment;Part1:Protocolspecification".[2]ETSIEN302093-2:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Point-to-pointmulticonnectionbearercontrolspecificationinaseparatedcallandbearerenvironment;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[3]ETSIEN302093-3:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Point-to-pointmulticonnectionbearercontrolspecificationinaseparatedcallandbearerenvironment;Part3:TestSuiteStructureandTestPurposes(TSS&TP)specification".[4]ISO/IEC9646-1:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework,Part1:Generalconcepts".[5]ISO/IEC9646-2:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework,Part2:AbstractTestSuiteSpecification".[6]ISO/IEC9646-3:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework,Part3:TheTreeandTabularCombinedNotation".[7]ISO/IEC9646-4:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework,Part4:Testrealization".[8]ISO/IEC9646-5:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework,Part5:Requirementsontestlaboratoriesandclientsfortheconformanceassessmentprocess".[9]ETSIEN302092-1:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN)andBroadbandPrivateIntegratedServicesNetwork(B-PISN);DigitalSubscriberSignallingSystemNo.two(DSS2),BroadbandInter-ExchangeSignalling(B-QSIG),andSignallingSystemNo.7(SS7);Callcontrolinaseparatedcallandbearercontrolenvironment;Part1:Protocolspecification".[10]ITU-TRecommendationI.413:"B-ISDNuser-networkinterface".SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)73Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapplyinadditiontothedefinitionsinEN302092-1[9]:Abstracttestcase:RefertoISO/IEC9646-1[4]AbstractTestMethod(ATM):RefertoISO/IEC9646-1[4]AbstractTestSuite(ATS):RefertoISO/IEC9646-1[4]ImplementationUnderTest(IUT):RefertoISO/IEC9646-1[4]Lowertester(LT):RefertoISO/IEC9646-1[4]ProtocolImplementationConformanceStatement(PICS):RefertoISO/IEC9646-1[4]PICSproforma:RefertoISO/IEC9646-1[4]ProtocolImplementationeXtraInformationforTesting(PIXIT):RefertoISO/IEC9646-1[4]PIXITproforma:RefertoISO/IEC9646-1[4]PointofControlandObservation(PCO):RefertoISO/IEC9646-1[4]SystemUnderTest(SUT):RefertoISO/IEC9646-1[4]TestPurpose(TP):RefertoISO/IEC9646-1[4]UpperTester(UT):RefertoISO/IEC9646-1[4]3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ATMAbstractTestMethodATSAbstractTestSuiteB-ISDNBroadbandIntegratedServicesDigitalNetworkCMCo-ordinationMessageCPCo-ordinationPointDSS2DigitalSubscriberSignallingSystemNo.twoExTSExecutableTestSuiteIUTImplementationUnderTestLTLowerTesterMOTMeansOfTestingMTCMainTestComponentPCOPointofControlandObservationPDUProtocolDataUnitPICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtraInformationforTestingPTCParallelTestComponentSUTSystemUnderTestTCPTestCo-ordinationProceduresTPTestPurposeTTCNTreeandTabularCombinedNotationUTUpperTesterSIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)84AbstractTestMethod4.1DescriptionofATMusedTherequirementfortestingthenetworkIUTistofocusonthebehaviourofthenetworkIUTattheuser-networkinterfacewhereaTBreferencepointorcoincidentSBandTBreferencepointapplies.ThustheIUTisthenetworkDSS2protocolentityataparticularuser-networkinterfaceandisnotthewholenetwork.ItispossibletospecifyanATSbasedonaSingleparty(remote)testmethodforsuchanIUT.However,itisconsideredthatanATSbasedonsuchanapproachisoflimiteduseastheonlywaytospecifyIUTgeneratedPDUsistousethe"implicitsend"statement.ManyusersofsuchanATSwouldreplacethe"implicitsend"statementswithdescriptionsofthebehaviouratotherinterfaces.AnATSbasedonamulti-partytestmethodisconsideredtobemoreusefulinthatitisclosertohowarealtestsuitewouldbeconstructed.Suchatestmethodspecifiesbehaviouratmultiplenetworkinterfaces.Oneveryimportantlimitationhereisthattestsarefocussedononeparticularinterface.ThusthetestsystemismadeuponeMainTestComponent(MTC)andoneormoreParallelTestComponents(PTC),seefigure1.4.2ConventionsfortestcomponentsandPCOsMasterpartOPERATORSlavepartO(PCO)A1(CP)L0(PCO)L1(PCO)IUTNETWORKFigure1:Multi-partytestmethodInamaster/slavearrangement,theMTCisconsideredtobethemasterwhilethePTCsaretheslaves.The"slave"testersareonlyanexplicitdescriptionofhowtodealwiththeremoteinterfacesduringthetestingprocess,i.e."howtomaketheIUTsendtherequiredmessage".SIST EN 302 093-4 V1.1.1:2005

ETSIETSIEN302093-4V1.1.1(2000-09)9Thismeans,inparticular,thattheverdictwillonlybeassignedfromtheprotocolaspectsobservedontheinterfaceundertest(i.e.bythe"master"tester),asitwouldbeobservedbyaterminalconnectedtothisinterface.Afailureinthecorrelationbetweentheprotocolatthedifferentinterfacestowhichthedifferenttestersareconnected,i.e.inthemechanismofthefunctionalserviceitself,willnotcauseaFAILverdict.Forinstance,iftheIUTfailstosendamessageonthetestedinterfaceafteranotherinterfacehasreceivedtheproperstimulus,theverdictwillbeINCONCLUSIVE.TheMTCMTCAhastwofunctionsinthisconfiguration.Firstly,ithastheMTCfunctionofcontrollingtheoneormorePTCs.ThusitisresponsibleforstartingthePTCsandafterwardsco-ordinatesactivitiesbyexchangingCo-ordinationMessages(CM)withthePTCs.SecondlyitisresponsibleforthebehaviouroftheLowerTester(LT)atPCOL0.Acombinationoftheremoteandmulti-partytestmethodsisapplied.Ascanbeseenfromfigure1,severalPCOsareused.AllPCOsresideattheserviceaccesspointsbetweenlayers2and3.MTCSUTPTC1Layer3Layer2Layer1L0IUTL1Layer3Layer2Layer1ServiceproviderFigure2:Combinationoftheremoteandmulti-partytestmethodsTheMTCPCOisnamed"L0"("L"forLower)and"O".TheL0PCOisusedtocontrolandobservethebehaviouroftheIUTandtestcaseverdictsareassigneddependingonthebehaviourobservedatthisPCO.ISO/IEC9646-2[5]allowstheinformalexpressionofTestCo-ordinationProcedures(TCP)betweentheSystemUnderTest(SUT)upperlayer(s)andtheLowerTester(LT).IntheATScontainedinannexC,TCPisachievedbyuseofasecond"informal"PCO,called"O"(forOperator).ThisPCOisusedtospecifycontrolbutnotobservationabovetheIUTandconsequently,eventsatthisPCOareneverusedtogeneratetestcaseverdicts.TheuseofthisOPCOisregardedasapreferredalternativetotheuseoftheimplicitsendevent,inthatitallowstheATStospecifyinaclearandmeaningfulwaywhatactionsarerequiredtobeperformedontheIUT.AsanalternativeofL1,theOPCOisusedforanendCCenity.ThePTCPTC1usesPCOsL1.ThesePCOisusedtocontroland,inalimitedway,observethebehaviourofthenetworkequipmentatinterfaceotherthantheoneundertest.NoverdictsareassignedatthisPCO.Asstatedinapreviousparagraph,thenon-receiptofnetworkgeneratedmessagesatL0,whicharestimulatedbyeventsattheL1,willresultinINCONCLUSIVEratherthanFAILverdictsbeinga
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