ETSI ETS 300 195-4-1998 Integrated Services Digital Network (ISDN) Supplementary Service Interactions Digital Subscriber Signalling System No One (DSS1) Protocol Part 4 Abstract Te_1.pdf

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1、 STD.ETS1 ETS 300 195-4-ENGL 1998 3400855 0285100 33T M IUROPEAN ELECOMMUNICATION STAN DARD ETS 300 195-4 April 1998 Source: SPS Reference: DE/SPS-05061-2-4 ICs: 33.020 Key words: ISDN, DSSl , supplementary service, interaction, testing, ATS, PIXIT, user Integrated Services Digital Network (ISDN); S

2、upplementary service interactions; Digital Subscriber Signalling System No. one (DSSI) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation extra Information for Testing (PIXIT) proforma specification for the user ETSI European Telecommunications Standards Institute ETSI S

3、ecretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Internet: secretariat Qetsi.fr - http:/www.etsi.fr - http:/www.etci.org Tel.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: No part ma

4、y be reproduced except as authorized by writen permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 1998. All rights reserved. STD-ETSI ET3 300 195-4-ENGL 3998 3400855 0285303 27b W Page 2 ETS 300 195-4: April

5、1998 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. STD-ET

6、SI ETS 300 195-4-ENGL 1998 3400855 0285302 302 9 Page 3 ETC 300 195-4: April 1998 Contents Foreword 5 1 Scope . 7 2 Normative references 7 3 Definitions and abbreviations . 8 Definit ions 3.1 ._ _. 8 3.2 Abbreviations . _ 8 4 Abstract Test Method (ATM) . 9 5 Untestable test purposes . 9 6 ATS conven

7、tions . 9 6.1 Declarations part 9 Structured type definitions . 10 TTCN structured type definitions 10 ASN.l structured type definitions 10 ASP type definitions . 11 TTCN ASP type definitions . 11 ASN.1 ASP type definitions 12 PDU type definitions 12 TTCN PDU type definitions . 12 ASN.1 PDU type def

8、initions 12 6.1.2 Test suite constants 12 6.1.3 6.1.4 Variables 12 6.1.1 Type definitions . 9 6.1.1.1 6.1.1.2 Simple type definitions . 9 6.1.1.2.1 6.1.1.2.2 6.1.1.3.1 6.1.1.3.2 6.1.1.4.1 6.1.1.4.2 6.1.1.3 6.1.1.4 Test suite parameters . 12 6.1.4.1 Test suite variables . . 12 6.1.4.2 Test case varia

9、bles 12 Test suite operation definitions 13 Structured type constraint declaration . 13 ASN.1 type constraint declaration . 13 6.2.2.1 Specification of encoding rules 14 ASP type constraint declaration 15 6.2.3.1 ASN.l ASP type constraint declaration . 15 6.2.3.2 TTCN ASP type constraint declaration

10、 15 PDU type constraint declaration 15 6.2.4.1 ASN.l PDU type constraint declaration . 15 6.2.4.2 TTCN PDU type constraint declaration . 15 Chaining of constraints 15 6.2.5.1 Static chaining . 15 6.2.5.2 Dynamic chaining 15 6.2.6 Derived constraints 16 6.2.7 Parameterized constraints . 16 Value assi

11、gnment 16 6.2.8 6.2.8.1 Specific values . 16 6.2.8.2 Matching values . 16 6.1.5 6.2.1 6.2.2 6.2.3 6.2 Constraints pari . . 13 6.2.4 6.2.5 6.3 Dynamic part _ 16 6.3.1 Test cases . 16 6.3.2 Test steps 16 6.3.3 Defaults . 16 7 ATS to TP map . 17 STD-ETSI ETS 300 195-4-ENGL 2998 3400855 0285103 049 D Pa

12、ge 4 ETS 300 195-4: April 1998 8 PCTR conformance 17 9 PIXIT conformance . 17 10 ATS conformance . 17 Annex A (normative): Protocol Conformance Test Report (PCTR) proforma 18 A.l A.2 A.3 A . 4 A.5 A.6 A.7 Identification summary 18 A.l.l Protocol conformance test report 18 A.1.2 IUT identification 18

13、 A.1.3 Testing environment . 18 A.1.4 Limits and reservations 19 A.1.5 Comments . 19 IUT conformance status . 19 Static conformance summary . I . 19 Dynamic conformance summary . 19 Static conformance review report 20 Test campaign report 20 Observations . _._ . 22 Annex B (normative): Partial PIXIT

14、 proforma . 22 B.l Identification summary 23 8.2 Abstract test suite summary . 23 B.3 Test laboratory 23 8.4 Client (of the test laboratory) . 24 8.5 System Under Test (SUT) 24 B.6 Protocol information 25 B.6.1 Protocol identification 25 8.6.2 Parameter values 25 B.6.3 B.6.4 B.6.5 B.6.6 Actions requ

15、ired to invoke supplementary services 25 Actions required to activate supplementary services 25 Actions required to provoke the IUT 26 Options supported by the IUT . 26 Annex C (normative): Abstract Test Suite (ATS) 27 C.l The TTCN Graphical form (TTCN.GR) -. 27 (2.2 The TTCN Machine Processable for

16、m (lTCN.MP) . 27 Annex D (informative): General structure of ATS . 28 History 29 STD-ETSI ETS 300 195-4-ENGL 1998 = 3400855 0285104 T85 Page 5 ETS 300 195-4: April 1998 Foreword This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols and Switching (SPS) Technical

17、 Committee of the European Telecommunications Standards Institute (ETSI). This ETS is part 4 of a multi-part standard covering the Digital Subscriber Signalling System No. one (DSSl) protocol specification for the Integrated Services Digital Network (ISDN) supplementary service interactions, as desc

18、ribed below: Part 1: “Protocol specification“; Part 2: “Protocol Implementation Conformance Statement (PICS) proforma specification“; Part 3: “Test Suite Structure and Test Purposes (TSS Part 4: “Abstract Test Suite (ATS) and partial Protocol Implementation extra Information for Testing (PIXIT) prof

19、orma specification for the user“; Part 5: “TSS Part 6: “ATS and partial PIXIT proforma specification for the network Transposition dates Date of adoption of this ETS: 20 March 1998 I Date of latest announcement of this ETS (doa): 31 July 1998 I Date of latest publication of new National Standard or

20、endorsement of this ETS (dop/e): 31 January 1999 I I Date of withdrawal of any conflicting National Standard (dow): 31 January 1999 STD-ETSI ETS 300 L95-4-ENGL 3998 W 3400855 0285305 933 9 Page 7 ETS 300 195-4: April 1998 1 Scope This fourth part of ETS 300 195 specifies the Abstract Test Suite (ATS

21、) and partial Protocol Implementation extra Information for Testing (PIXIT) proforma for the User side of the T reference point or coincident S and T reference point (as defined in ITU-T Recommendation 1.411 ll) of implementations conforming to the stage three standard for the supplementary service

22、interactions for the pan-European Integrated Services Digital Network (ISDN) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol, ETS 300 195-1 2. ETC 300 195-3 4 specifies the Test Suite Structure and Test Purposes (TSS User-network interface layer 3; Specifications for bas

23、ic call control“. ETS 300 195-1 (1995): “Integrated Services Digital Network (ISDN); Supplementary service interactions; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1 : Protocol specification“. ETS 300 195-2 (1996): Integrated Services Digital Network (ISDN); Supplementary ser

24、vice interactions; Digital Subscriber Signalling System No. one (DSSl) protocol; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification“. ETS 300 195-3: “Integrated Services Digital Network (ISDN); Supplementary service interactions; Digital Subscriber Signalling System

25、No. one (DSSl) protocol; Part 3: Test Suite Structure and Test Purposes (TSS Generic functional protocol for the support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1 : Protocol specification“. ISO/IEC 9646-1 : “Information technology - OS1 Conforman

26、ce Testing Methodology and Framework; Part 1 : General Concepts“. ISO/IEC 9646-2: “Information technology - OS1 Conformance Testing Methodology and Framework; Part 2: Abstract Test Suite Specification“. ISO/IEC 9646-3: “Information technology - OS1 Conformance Testing Methodology and Framework; Part

27、 3: The Tree and Tabular Combined Not at i on I. ISO/IEC 9646-4: “Information technology - OS1 Conformance Testing Methodology and Framework; Part 4: Test realization“. ISO/IEC 9646-5: “Information technology - OS1 Conformance Testing Methodology and Framework; Part 5: Requirements on test laborator

28、ies and clients for the conformance assessment process“. ITU-T Recommendation 1.41 1 (1 993): “ISDN user-network interfaces - Ref e re n ce con f i g ura t i ons “ . lrevious page is blaiik STD.ETS1 ETS 300 395-4-ENGL 3998 m 3400855 0285306 858 m Page 8 ETS 300 195-4: April 1998 CCITT Recommendation

29、 X.209 (1 988): “Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1)“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of this ETS, the following definitions apply: Abstract Test Suite (ATS): See ISO/IEC 9646-1 6. Implementation Under Test (IUT): See ISO/I

30、EC 9646-1 SI. Lower Tester (LT): See ISO/iEC 9646-1 6. Point of Control and Observation (PCO): See iSO/IEC 9646-1 6. Protocol Implementation Conformance Statement (PICS): See ISO/IEC 9646-1 6. PICS proforma: See ISO/IEC 9646-1 6. Protocol Implementation extra Information for Testing (PIXIT): See ISO

31、/IEC 9646-1 6. PIXIT proforma: See ISO/IEC 9646-1 6. System Under Test (SUT): See iSO/iEC 9646-1 6. Upper Tester (UT): See ISOIIEC 9646-1 6. 3.2 Abbrevl atlons For the purposes of this ETS, the following abbreviations apply: ASP ATM ATS BER ExTS FIE i UT LT MOT PCO PCTR PDU P ICs PIXIT SUT TCP TP TT

32、C N UT Abst ract Service Prim it ive Abstract Test Method Abstract Test Suite Basic Encoding Rules Executable Test Suite Facility Information Element Implementation Under Test Lower Tester Means Of Testing Point of Control and Observation Protocol Conformance Test Report Protocol Data Unit Protocol

33、Implementation Conformance Statement Protocol implementation extra Information for Testing System Under Test Test Co-ordination Procedures Test Purpose Tree and Tabular Combined Notation Upper Tester STD.ETS1 ETS 300 195-4-ENGL 1998 = 3400855 0285L07 794 Page 9 ETS 300 195-4: April 1998 4 Abstract T

34、est Method (ATM) The remote test method is applied for the supplementary service interactions user ATS. The Point of Control and Observation (PCO) resides at the service access point between layers 2 and 3. This PCO is named “L“ (for Lower). The L PCO is used to control and observe the behaviour of

35、the Implementation Under Test (IUT) and test case verdicts are assigned depending on the behaviour observed at this PCO. Tester Figure 1: Remote test method ISO/IEC 9646-2 7 allows the informal expression of Test Co-ordination Procedures (TCP) between the System Under Test (SUT) upper layer) and the

36、 Lower Tester (LT). In the ATS contained in annex C, TCP is achieved by use of a second “informal“ PCO, called “O“ (for Operator). This PCO is used to specify control but not observation above the IUT and consequently, events at this PCO are never used to generate test case verdicts. The use of this

37、 O PCO is regarded as a preferred alternative to the use of the implicit send event, in that it allows the ATS to specify in a clear and meaningful way what actions are required to be performed on the IUT. 5 Untestable test purposes There are no untestable test purposes associated with this ATS. 6 A

38、TS conventions This clause is structured similarly to the structure of a TTCN ATS. However, the names of the subclauses are arranged in a way more suitable to this ETS. 6.1 Declarations part 6.1.1 Type definitions 6.1.1.1 Simple type definitions Where appropriate, simple types have a length, a value

39、 list or a range restriction attached. Simple types defined as being of some string type (e.9. BIT STRING, OCTET STRING), have a length restriction or a value list attached. Simple types, defined as being of INTEGER type, have a value list or a range restriction attached. STD.ETS1 ETS 300 195-4-ENGL

40、 1998 3400855 0285108 b20 Page 10 ETS 300 195-4: April 1998 6.1.1.2 Structured type definitions 6.1.1.2.1 TTCN structured type definitions All structured type definitions are provided with a full name. All elements in every structured type definition, defined as being of some string type (e.g. BIT S

41、TRING, OCTET STRING), have a length restriction attached. If an element in a structured type definition is defined as being of a referenced type, the (possible) restriction is defined in that referenced type. For information elements the identifier, which is unique for each element, has its type def

42、ined as a simple type where the value list is restricted to the single value which is the identifier itself. This has the advantage that it allows a test system derived from this ATS to easily identify information elements embedded in messages. An ATS where information element identifiers are repres

43、ented as unrestricted types can present difficulties for a derived test system in the case where it needs to find one information element embedded in a number of others and the constraints for the other elements have the any-or-omit value. In such a case the test system cannot easily find the beginn

44、ing of each information element. 6.1.1.2.2 ASN.l structured type definitions ASN.l has been used for three major reasons. First, types defined in ASN.l can model problems that “pure“ TTCN cannot. For instance, data structures modelling ordered or unordered sequences of data are preferably defined in

45、 ASN.1. Second, ASN.1 provides a better restriction mechanism for type definitions by using sub-type definitions. Third, it is necessary to use ASN.l to reproduce the type definitions for remote operation components as specified in the base standards. The fact that ASN.1 provides a better restrictio

46、n mechanism for type definitions is used for the purpose of achieving typecompatibility. In table 1, the ASN.1 type BIT70R15 is defined as being of type BIT STRING with a size constraint attached to it. The size is determined by the value of CR-LENGTH, a test suite parameter. It can have the value o

47、f either 7 or 15. The type BIT70R15 is used in the structured type CR, field cr-r allowing this type to represent a Basic Access or a Primary Rate Access call reference. By using this type definition the field cr-r is always type compatible with values of type BIT STRING (SIZE(7) and BIT STRING (SIZ

48、E(15). Another approach to solve this type problem would be to define the type BIT70R15 as BIT STRING (SIZE(7 115). This type has a small disadvantage compared with the previous one. It is impossible, in run-time, to determine the actual length of any instance of this type. Table 1: ASN.l type defin

49、ition BIT70R15 ASN.1 Type Definition Typa Name : BIT70R15 C-ants : BIT STRING (SIZE (CR LENGTH) ) me Definition Table 2 shows a typical use of ASN.l. The CHI element will have two different type definitions depending on whether it represents basic or primary rate access. In TTCN, this needs to be defined as two different types. In ASN.l this can be done in one, the type being a choice of either BASIC-CHI or PRIMARY-CHI. These two types are then (locally) defined in the sam