SIST EN 300 195-4 V1.2.1:2004
(Main)Integrated Services Digital Network (ISDN); Supplementary service interactions; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user
General Information
- Abstract
Test specification for RE/SPS-05138-1
- Status
- Published
- Publication Date
- 31-Mar-2004
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Apr-2004
- Due Date
- 01-Apr-2004
- Completion Date
- 01-Apr-2004
Overview
SIST EN 300 195-4 V1.2.1:2004 defines the testing specifications for supplementary service interactions in the Integrated Services Digital Network (ISDN) environment, specifically using the Digital Subscriber Signalling System No. one (DSS1) protocol, focusing on the user side interface. The standard, developed by the Slovenski inštitut za standardizacijo (SIST), provides an Abstract Test Suite (ATS) and a partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma. These tools help ensure that ISDN implementations conform to supplementary service interaction requirements, as set out in the pan-European ISDN environment.
This standard plays a crucial role for developers, system integrators, and test laboratories involved in the validation and certification of ISDN supplementary services. By providing a structured approach to conformance testing, it ensures the interoperability, performance, and reliability of ISDN equipment in delivering advanced telecommunication services.
Key Topics
Abstract Test Suite (ATS):
- Defines formalized, abstract test cases for verifying that an ISDN implementation conforms to the DSS1 protocol and supplementary service requirements.
- Utilizes Tree and Tabular Combined Notation (TTCN) for test definition, supporting repeatable, consistent test execution.
Partial PIXIT Proforma:
- Serves as a questionnaire for implementers and testers to record additional protocol details and behaviors not captured in standard conformance statements.
- Ensures all necessary protocol options, parameters, and timer values are clearly detailed for accurate testing.
Testing Methodology:
- Supports remote testing methodologies as described in ISO/IEC 9646 standards.
- Emphasizes both static and dynamic test scenarios to comprehensively validate user-side supplementary service interactions.
Conformance Reporting:
- Includes Protocol Conformance Test Report (PCTR) templates for structured reporting of test results.
- Facilitates traceability and accountability through systematic documentation.
Applications
ISDN Equipment Certification:
- Manufacturers and system integrators can use the test suites to certify that their ISDN solutions meet European requirements for supplementary services, ensuring market acceptance and regulatory compliance.
Interoperability Validation:
- Network operators and service providers can use this standard to verify that different ISDN products interoperate correctly, especially in multi-vendor environments.
Quality Assurance in Development:
- Development teams benefit from structured test cases, reducing implementation errors and supporting automated test infrastructures.
Test Laboratory Operations:
- Accredited test labs rely on ATS and PIXIT proforma documentation to offer consistent, reproducible ISDN conformance assessments for the user side.
Troubleshooting and Support:
- Clear documentation of expected protocol behaviors and options aids in diagnosing and resolving interoperability or feature implementation issues.
Related Standards
- EN 300 195-1: Protocol specification for DSS1 supplementary service interactions.
- EN 300 195-2: PICS (Protocol Implementation Conformance Statement) proforma specification.
- EN 300 195-3: Test Suite Structure and Test Purposes (TSS&TP) for the user.
- EN 300 195-5 and 195-6: Network side ATS and PIXIT specifications.
- ISO/IEC 9646 Series: Core framework for open systems conformance testing methodology.
- ITU-T Recommendation I.411: Reference configurations for ISDN user-network interfaces.
By adhering to the SIST EN 300 195-4 V1.2.1:2004 standard, stakeholders in the ISDN ecosystem can ensure robust implementation and reliable verification of supplementary services, significantly enhancing service quality and customer satisfaction in digital telecommunication networks.
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Frequently Asked Questions
SIST EN 300 195-4 V1.2.1:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Supplementary service interactions; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user". This standard covers: Test specification for RE/SPS-05138-1
Test specification for RE/SPS-05138-1
SIST EN 300 195-4 V1.2.1:2004 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 195-4 V1.2.1:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YSOLYDQMHIntegrated Services Digital Network (ISDN); Supplementary service interactions; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 195-4 Version 1.2.1SIST EN 300 195-4 V1.2.1:2004en01-april-2004SIST EN 300 195-4 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300195-4V1.2.1(2000-11)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);Supplementaryserviceinteractions;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part4:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuserSIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)2ReferenceREN/SPAN-05138-4KeywordsISDN,DSS1,supplementaryservice,interaction,ATS,PIXIT,user,testingETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°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:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74AbstractTestMethod(ATM).85Untestabletestpurposes.86ATSconventions.86.1Declarationspart.86.1.1Typedefinitions.86.1.1.1Simpletypedefinitions.86.1.1.2Structuredtypedefinitions.96.1.1.2.1TTCNstructuredtypedefinitions.96.1.1.2.2ASN.1structuredtypedefinitions.96.1.1.3ASPtypedefinitions.106.1.1.3.1TTCNASPtypedefinitions.106.1.1.3.2ASN.1ASPtypedefinitions.116.1.1.4PDUtypedefinitions.116.1.1.4.1TTCNPDUtypedefinitions.116.1.1.4.2ASN.1PDUtypedefinitions.116.1.2Testsuiteconstants.116.1.3Testsuiteparameters.116.1.4Variables.116.1.4.1Testsuitevariables.116.1.4.2Testcasevariables.116.1.5Testsuiteoperationdefinitions.126.2Constraintspart.126.2.1Structuredtypeconstraintdeclaration.126.2.2ASN.1typeconstraintdeclaration.126.2.2.1Specificationofencodingrules.136.2.3ASPtypeconstraintdeclaration.146.2.3.1ASN.1ASPtypeconstraintdeclaration.146.2.3.2TTCNASPtypeconstraintdeclaration.146.2.4PDUtypeconstraintdeclaration.146.2.4.1ASN.1PDUtypeconstraintdeclaration.146.2.4.2TTCNPDUtypeconstraintdeclaration.146.2.5Chainingofconstraints.146.2.5.1Staticchaining.146.2.5.2Dynamicchaining.146.2.6Derivedconstraints.156.2.7Parameterizedconstraints.156.2.8Valueassignment.156.2.8.1Specificvalues.156.2.8.2Matchingvalues.156.3Dynamicpart.156.3.1Testcases.156.3.2Teststeps.156.3.3Defaults.16SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)47ATStoTPmap.168PCTRconformance.169PIXITconformance.1610ATSconformance.16AnnexA(normative):ProtocolConformanceTestReport(PCTR)proforma.17A.1Identificationsummary.17A.1.1Protocolconformancetestreport.17A.1.2IUTidentification.17A.1.3Testingenvironment.17A.1.4Limitsandreservations.18A.1.5Comments.18A.2IUTconformancestatus.18A.3Staticconformancesummary.18A.4Dynamicconformancesummary.18A.5Staticconformancereviewreport.19A.6Testcampaignreport.19A.7Observations.21AnnexB(normative):PartialPIXITproforma.22B.1Identificationsummary.22B.2Abstracttestsuitesummary.22B.3Testlaboratory.22B.4Client(ofthetestlaboratory).23B.5SystemUnderTest(SUT).23B.6Protocolinformation.24B.6.1Protocolidentification.24B.6.2Parametervalues.24B.6.3Actionsrequiredtoinvokesupplementaryservices.24B.6.4Actionsrequiredtoactivatesupplementaryservices.25B.6.5ActionsrequiredtoprovoketheIUT.25B.6.6OptionssupportedbytheIUT.26B.6.7Timervalues.26B.7BasiccallPIXITitems.27B.7.1Parametervalues-informationelementcodings.27AnnexC(normative):AbstractTestSuite(ATS).28C.1TheTTCNGraphicalform(TTCN.GR).28C.2TheTTCNMachineProcessableform(TTCN.MP).28AnnexD(informative):GeneralstructureofATS.29History.30SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)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-partdeliverablecoveringtheDigitalSubscriberSignallingSystemNo.one(DSS1)protocolspecificationfortheIntegratedServicesDigitalNetwork(ISDN)supplementaryserviceinteractions,asdescribedbelow:Part1:"Protocolspecification";Part2:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specificationfortheuser";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser";Part5:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork";Part6:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetwork".NationaltranspositiondatesDateofadoptionofthisEN:3November2000DateoflatestannouncementofthisEN(doa):28February2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31August2001DateofwithdrawalofanyconflictingNationalStandard(dow):31August2001SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)61ScopeThepresentdocumentspecifiestheAbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformafortheUsersideoftheTreferencepointorcoincidentSandTreferencepoint(asdefinedinITU-TRecommendationI.411[10])ofimplementationsconformingtothestagethreestandardforthesupplementaryserviceinteractionsforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)bymeansoftheDigitalSubscriberSignallingSystemNo.one(DSS1)protocol,EN300195-1[1].EN300195-3[3]specifiestheTestSuiteStructureandTestPurposes(TSS&TP)relatedtothisATSandpartialPIXITproforma.OtherpartsspecifytheTSS&TPandtheATSandpartialPIXITproformafortheNetworksideoftheTreferencepointorcoincidentSandTreferencepointofimplementationsconformingtoEN300195-1[1].2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ETSIEN300195-1:"IntegratedServicesDigitalNetwork(ISDN);Supplementaryserviceinteractions;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[2]ETSIEN300195-2:"IntegratedServicesDigitalNetwork(ISDN);Supplementaryserviceinteractions;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[3]ETSIEN300195-3:"IntegratedServicesDigitalNetwork(ISDN);Supplementaryserviceinteractions;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part3:TestSuiteStructureandTestPurposes(TSS&TP)specificationfortheuser".[4]ETSIEN300196-1:"IntegratedServicesDigitalNetwork(ISDN);Genericfunctionalprotocolforthesupportofsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[5]ISO/IEC9646-1:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part1:Generalconcepts".[6]ISO/IEC9646-2:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part2:AbstractTestSuitespecification".[7]ISO/IEC9646-3:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part3:TheTreeandTabularCombinedNotation(TTCN)".[8]ISO/IEC9646-4:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part4:Testrealization".[9]ISO/IEC9646-5:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part5:Requirementsontestlaboratoriesandclientsfortheconformanceassessmentprocess".[10]ITU-TRecommendationI.411(1993):"ISDNuser-networkinterfaces-Referenceconfigurations".SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)7[11]CCITTRecommendationX.209(1988):"SpecificationofbasicencodingrulesforAbstractSyntaxNotationOne(ASN.1)".[12]ETSIEN300102-1:"IntegratedServicesDigitalNetwork(ISDN);User-networkinterfacelayer3;Specificationsforbasiccallcontrol".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:AbstractTestSuite(ATS):seeISO/IEC9646-1[5]ImplementationUnderTest(IUT):seeISO/IEC9646-1[5]LowerTester(LT):seeISO/IEC9646-1[5]PointofControlandObservation(PCO):seeISO/IEC9646-1[5]ProtocolImplementationConformanceStatement(PICS):seeISO/IEC9646-1[5]PICSproforma:seeISO/IEC9646-1[5]ProtocolImplementationeXtraInformationforTesting(PIXIT):seeISO/IEC9646-1[5]PIXITproforma:seeISO/IEC9646-1[5]SystemUnderTest(SUT):seeISO/IEC9646-1[5]UpperTester(UT):seeISO/IEC9646-1[5]3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ASPAbstractServicePrimitiveATMAbstractTestMethodATSAbstractTestSuiteBERBasicEncodingRulesExTSExecutableTestSuiteFIEFacilityInformationElementIUTImplementationUnderTestLTLowerTesterMOTMeansOfTestingPCOPointofControlandObservationPCTRProtocolConformanceTestReportPDUProtocolDataUnitPICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtraInformationforTestingSUTSystemUnderTestTCPTestCo-ordinationProceduresTPTestPurposeTTCNTreeandTabularCombinedNotationUTUpperTesterSIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)84AbstractTestMethod(ATM)TheremotetestmethodisappliedforthesupplementaryserviceinteractionsuserATS.ThePointofControlandObservation(PCO)residesattheserviceaccesspointbetweenlayers2and3.ThisPCOisnamed"L"(forLower).TheLPCOisusedtocontrolandobservethebehaviouroftheImplementationUnderTest(IUT)andtestcaseverdictsareassigneddependingonthebehaviourobservedatthisPCO.TesterSUTLTIUTPCOLayer2Layer2Layer1Layer1ServiceproviderFigure1:RemotetestmethodISO/IEC9646-2[6]allowstheinformalexpressionofTestCo-ordinationProcedures(TCP)betweentheSystemUnderTest(SUT)upperlayer(s)andtheLowerTester(LT).IntheATScontainedinannexC,TCPisachievedbyuseofasecond"informal"PCO,called"O"(forOperator).ThisPCOisusedtospecifycontrolbutnotobservationabovetheIUTandconsequently,eventsatthisPCOareneverusedtogeneratetestcaseverdicts.TheuseofthisOPCOisregardedasapreferredalternativetotheuseoftheimplicitsendevent,inthatitallowstheATStospecifyinaclearandmeaningfulwaywhatactionsarerequiredtobeperformedontheIUT.5UntestabletestpurposesTherearenountestabletestpurposesassociatedwiththisATS.6ATSconventionsThisclauseisstructuredsimilarlytothestructureofaTTCNATS.However,thenamesofthesubclausesarearrangedinawaymoresuitabletothepresentdocument.6.1Declarationspart6.1.1Typedefinitions6.1.1.1SimpletypedefinitionsWhereappropriate,simpletypeshavealength,avaluelistorarangerestrictionattached.Simpletypesdefinedasbeingofsomestringtype(e.g.BITSTRING,OCTETSTRING),havealengthrestrictionoravaluelistattached.Simpletypes,definedasbeingofINTEGERtype,haveavaluelistorarangerestrictionattached.SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)96.1.1.2Structuredtypedefinitions6.1.1.2.1TTCNstructuredtypedefinitionsAllstructuredtypedefinitionsareprovidedwithafullname.Allelementsineverystructuredtypedefinition,definedasbeingofsomestringtype(e.g.BITSTRING,OCTETSTRING),havealengthrestrictionattached.Ifanelementinastructuredtypedefinitionisdefinedasbeingofareferencedtype,the(possible)restrictionisdefinedinthatreferencedtype.Forinformationelementstheidentifier,whichisuniqueforeachelement,hasitstypedefinedasasimpletypewherethevaluelistisrestrictedtothesinglevaluewhichistheidentifieritself.ThishastheadvantagethatitallowsatestsystemderivedfromthisATStoeasilyidentifyinformationelementsembeddedinmessages.AnATSwhereinformationelementidentifiersarerepresentedasunrestrictedtypescanpresentdifficultiesforaderivedtestsysteminthecasewhereitneedstofindoneinformationelementembeddedinanumberofothersandtheconstraintsfortheotherelementshavetheany-or-omitvalue.Insuchacasethetestsystemcannoteasilyfindthebeginningofeachinformationelement.6.1.1.2.2ASN.1structuredtypedefinitionsASN.1hasbeenusedforthreemajorreasons.First,typesdefinedinASN.1canmodelproblemsthat"pure"TTCNcannot.Forinstance,datastructuresmodellingorderedorunorderedsequencesofdataarepreferablydefinedinASN.1.Second,ASN.1providesabetterrestrictionmechanismfortypedefinitionsbyusingsub-typedefinitions.Third,itisnecessarytouseASN.1toreproducethetypedefinitionsforremoteoperationcomponentsasspecifiedinthebasestandards.ThefactthatASN.1providesabetterrestrictionmechanismfortypedefinitionsisusedforthepurposeofachievingtype-compatibility.Intable1,theASN.1typeBIT7OR15isdefinedasbeingoftypeBITSTRINGwithasizeconstraintattachedtoit.ThesizeisdeterminedbythevalueofCR_LENGTH,atestsuiteparameter.Itcanhavethevalueofeither7or15.ThetypeBIT7OR15isusedinthestructuredtypeCR,fieldcr_rallowingthistypetorepresentaBasicAccessoraPrimaryRateAccesscallreference.Byusingthistypedefinitionthefieldcr_risalwaystypecompatiblewithvaluesoftypeBITSTRING(SIZE(7))andBITSTRING(SIZE(15)).AnotherapproachtosolvethistypeproblemwouldbetodefinethetypeBIT7OR15asBITSTRING(SIZE(7|15)).Thistypehasasmalldisadvantagecomparedwiththepreviousone.Itisimpossible,inrun-time,todeterminetheactuallengthofanyinstanceofthistype.Table1:ASN.1typedefinitionBIT7OR15ASN.1TypeDefinitionTypeName:BIT7OR15Comments:TypeDefinitionBITSTRING(SIZE(CR_LENGTH))Table2showsatypicaluseofASN.1.TheCHIelementwillhavetwodifferenttypedefinitionsdependingonwhetheritrepresentsbasicorprimaryrateaccess.InTTCN,thisneedstobedefinedastwodifferenttypes.InASN.1thiscanbedoneinone,thetypebeingachoiceofeitherBASIC_CHIorPRIMARY_CHI.Thesetwotypesarethen(locally)definedinthesametableandaccordingtothestandard.SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)10Table2:ASN.1typedefinitionCHIASN.1TypeDefinitionTypeName:CHIComments:InfoElementChannelIdentificationEN300102-1[12]clause4.5.13TypeDefinitionCHOICE{basicBASIC_CHI,primaryPRIMARY_CHI}--Localtypedefinitions--BASIC_CHI::=SEQUENCE{chi_iCHI_I,--Identifierchi_lBITSTRING(SIZE(8)),--Lengthchi_e3_csBITSTRING(SIZE(8))--Channelselection}PRIMARY_CHI::=SEQUENCE{chi_iCHI_I,--Identifierchi_lBITSTRING(SIZE(8)),--Lengthchi_e3_p1BITSTRING(SIZE(4)),--FirstnibbleofChannelselectionchi_e3_peBITSTRING(SIZE(1)),--Preferred/ExclusiveBitchi_e3_p3BITSTRING(SIZE(3)),--LastthreebitsofChannelselectionchi_e4BITSTRING(SIZE(8)),--Channeltypechi_e5_chlBITSTRING(SIZE(1)),chi_e5_ch2BITSTRING(SIZE(7))--Channelnumber}Table3showsanexampleofhowASN.1canbeusedtomodelunorderedsequences.Table3:ASN.1typedefinitionFIESASN.1TypeDefinitionTypeName:FIESComments:TypeDefinitionSETOFFIEThepossibilitytouseTTCNandASN.1incombinationisused,i.e.referringtoanASN.1typefromaTTCNtype.6.1.1.3ASPtypedefinitions6.1.1.3.1TTCNASPtypedefinitionsTTCNASPtypedefinitionsonlycontainonePDUornoPDUatall.TherelationshipbetweenanASPtypeandaPDUtypeisone-to-one.Thatis,thereexistsoneASPtypedefinitionforeachPDUtypedefinition(ifthatASPtypecontainsaPDU).AllTTCNASPtypedefinitionsareprovidedwithafullidentifier.SomeASPsarenotparameterizedasshownintheexampleintable4.SuchASPsareonlyusedforrequestingorreceivingservicefromthelowerlayer.Table4:TTCNASPtypedefinitionDL_REL_INTTCNASPTypeDefinitionASPNAME:DL_REL_IN(DL_RELEASE_INDICATION)PCOType:SAPComments:ParameterName|ParameterType|CommentsDetailedComments:SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)11Table5showsanexampleofaparameterizedASP.AllASPscontainingPDUscontainonlythatPDUandnootherparameters.Table5:TTCNASPtypedefinitionDL_DATA_RQ_ALERTTTCNASPTypeDefinitionASPNAME:DL_DATA_RQ_ALERT(DL_DATA_REQUEST)PCOType:SAPComments:ParameterName|ParameterType|Commentsmun(MessageUnit)|ALERT_PDU|DetailedComments:6.1.1.3.2ASN.1ASPtypedefinitionsTherearenoASN.1ASPtypedefinitionsintheATS.6.1.1.4PDUtypedefinitions6.1.1.4.1TTCNPDUtypedefinitionsTheTTCNPDUtypereflectstheactualdatabeingtransferredorreceived.AllPDUsareembeddedinASPs.IfaspecificPDUtypedefinitioncontainselementsdefinedintermsofapre-definedtype,thatelementhasarestrictionattachedtoit.6.1.1.4.2ASN.1PDUtypedefinitionsTherearenoASN.1PDUtypedefinitionsintheATS.6.1.2TestsuiteconstantsNotestsuiteconstantsareusedordefinedinthisATS.6.1.3TestsuiteparametersEachtestsuiteparameterisdefinedintermsofapredefinedtypeorareferencedtype.Areferencedtypeisusedwhenitisnecessarytoattachrestrictionstothesetypedefinitions(itisnotallowedtoincluderestrictionsdirectlyinthetestsuiteparametertable).Thereferencedtypecanhavealengthorvaluerestrictionattachedtoitinitsdeclarationtable.6.1.4Variables6.1.4.1TestsuitevariablesNotestsuitevariablesareusedordefinedinthisATS.6.1.4.2TestcasevariablesEachtestcasevariableisdefinedintermsofapredefinedtypeorareferencedtype.Areferencedtypeisusedwhenitisnecessarytoattachrestrictionstothesetypedefinitions(itisnotallowedtoincluderestrictionsdirectlyinthetestcasevariabletable).Thereferencedtypecanhavealengthorvaluerestrictionattachedtoitinitsdeclarationtable.Wheretestcasevariablesareusedinconstraints,theyarepassedasformalparameters.SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)126.1.5TestsuiteoperationdefinitionsThedescriptionpartofatestsuiteoperationdefinitionuseseithernaturallanguageormetaC.Table6:TestsuiteoperationdefinitionASSIGN_CHITestSuiteOperationDefinitionOperationName:ASSIGN_CHI(basic,primary:CHI;basic_flag:BOOLEAN)ResultType:CHIComments:ThisoperationisusedtoassignacorrectChannelidentificationinformationelementtoPDUsdependentonthetypeofaccessthatistested.Description{if(basic_flag)returnbasic;elsereturnprimary}Detailedcomments:Thetestsuiteoperationdefinitionshownintable6isusedintheconstraintspartwhenassigninganelementoftypeCHIavalue.Aspreviouslydescribed,theCHItypecanbedefinedintwowaysdependingonwhethertheATSistestingbasicorprimaryrateaccess.ToavoidduplicatetypesandtherebyduplicatetestcasestheCHItypeisdefinedinASN.1.ThisoperationisusedtoassignavaluetoanelementofCHItype.Ittakesthreeparameters:primary:aconstraintoftypeCHIvalidforprimaryrateaccess;basic:aconstraintoftypeCHIvalidforbasicaccess;basic_flag:aBooleanvalue:TRUEifbasicaccessisapplicable,FALSEotherwise.ThisoperationreturnsthecorrectconstraintaccordingtotheBooleanflagbasic_flag.ThatconstraintwillthenbeassignedtothespecificelementoftypeCHI.6.2Constraintspart6.2.1StructuredtypeconstraintdeclarationForeverystructuredtypedefinitionthereexistsoneormorestructuredtypeconstraint.6.2.2ASN.1typeconstraintdeclarationConstraintsofthistypeareusedtoassignthecorrespondingtypeaspecificvalue.TheseconstraintsareusedforthepurposeofmodellingunordereddataorspecifictypesthatcannotbeexpressedinTTCN.AvalueassignedtoanelementoftypeSETOFdiffersdependingonwhetheritisasendorreceiveconstraint.Table7:ASN.1typeconstraintdeclarationfIEs(sendconstraint)ASN.1TypeConstraintDeclarationConstraintName:fIEs(comp:Component)ASN.1Type:FIEDerivationPath:Comments:SendFIEwhichwillcontainonecomponent"comp".Description{informationElementIdentifier'00011100'B,lengthCALC_FIE_LENGTH(comp),extBit'1'B,spareBits'00'B,protocolProfile'10001'B,components{comp}}Detailedcomments:NOTE:Thelastelementintheconstraint,components,isoftypeSETOFComponentwhereComponentisstructureddataofsometype.SIST EN 300 195-4 V1.2.1:2004
ETSIETSIEN300195-4V1.2.1(2000-11)13Iftheconstraintisasendconstraint(seetable7)thevalueforthecomponentelementisstatedas"{comp}"wherecompisanargumentreceivedasaparameter.The"{"and"}"turnsthevalueintoaSETOFvaluewhichiscorrectaccordingtothatelement'
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