SIST EN 301 068-6 V1.2.1:2003

• Abstract:

  Upgrade of test specification

• Status: Published
• Publication Date: 31-Oct-2003
• 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-Nov-2003
• Due Date: 01-Nov-2003
• Completion Date: 01-Nov-2003
• Ref Project: ETSI EN 301 068-6 V1.2.1 (2002-08) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network

SIST EN 301 068-6 V1.2.1:2003 is the Slovenian adoption of ETSI EN 301 068-6 V1.2.1. It specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for the network side of the Broadband Integrated Services Digital Network (B-ISDN) Digital Subscriber Signalling System No. two (DSS2) protocol. In practice, it supports conformance testing of ATM transfer capability and traffic parameter indication at the TB reference point or coincident SB and TB reference point.

What does SIST EN 301 068-6 V1.2.1:2003 specify?

SIST EN 301 068-6 V1.2.1:2003 specifies the network ATS for implementations conforming to EN 301 068-1 at the user-network interface. It is focused on the network DSS2 protocol entity at the TB reference point, or at a coincident SB and TB reference point, rather than on the whole network.

The document is organized into clauses on scope, references, definitions and abbreviations, the abstract test method, untestable test purposes, ATS to TP mapping, and conformance for PCTR, PIXIT and ATS. It then provides four annexes, three normative and one informative.

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

What are the key requirements of SIST EN 301 068-6 V1.2.1:2003?

Test method and test architecture

SIST EN 301 068-6 V1.2.1:2003 uses a combination of remote and multi-party test methods. The test setup has one Main Test Component (MTC) and one or more Parallel Test Components (PTCs), with Points of Control and Observation (PCOs) at the layer 2/layer 3 boundary.

This matters because the verdict is based on what is observed at the tested interface, not on every interaction inside the network. The PTCs help stimulate remote interfaces, but they do not assign verdicts.

Verdict handling and interface behavior

SIST EN 301 068-6 V1.2.1:2003 assigns verdicts from the master tester at PCO L0. If the network behavior at another interface does not lead to the expected message on the tested interface, the result is INCONCLUSIVE rather than FAIL.

This is important in practice when a procedure depends on coordination across several network interfaces. The ATS is therefore aimed at protocol behavior seen on the interface under test, not at proving service correlation across all network interfaces.

Test purposes and mapping

SIST EN 301 068-6 V1.2.1:2003 states that there are no untestable Test Purposes. It also says that the Test Purpose identifiers are reused as test case names, so the ATS to TP map is one-to-one.

That gives a direct link between each stated test purpose and its test case. For test planning, this makes it easier to trace coverage from the test purpose list to the executable tests.

PCTR, PIXIT and ATS conformance

SIST EN 301 068-6 V1.2.1:2003 requires a PCTR that follows the proforma in Annex A, including the same content and ordering of clauses. Annex B gives the partial PIXIT proforma to be completed and augmented for a particular IUT, SUT and test laboratory. Annex C contains the ATS, and executable test suites derived from it must contain technically equivalent groups and test cases.

In practice, this means the document is not only a test suite but also a template set for recording, parameterizing and realizing conformance testing.

Test parameters and configuration data

SIST EN 301 068-6 V1.2.1:2003 includes PIXIT items for protocol identification, configuration to be tested, test management timers and parameter values. The parameter list covers items such as called party number coding, bearer capability coding, ATM traffic descriptor coding, ABR setup parameters and preferred VPCI/VCI values.

These items matter because the laboratory needs concrete values before execution. They are the information that turns the abstract tests into a runnable test campaign for a specific implementation.

What terms does SIST EN 301 068-6 V1.2.1:2003 define?

• Abstract Test Suite (ATS) - The set of abstract test cases used to assess protocol conformance.
• Protocol Implementation eXtra Information for Testing (PIXIT) - Implementation-specific information needed to prepare and run the tests.
• Protocol Conformance Test Report (PCTR) - The report template used to record the conformance test outcome.
• Implementation Under Test (IUT) - The protocol entity being assessed for conformance.
• System Under Test (SUT) - The wider system configuration that contains the IUT.
• Point of Control and Observation (PCO) - The interface where the test system controls and observes protocol behavior.
• Main Test Component (MTC) - The part of the test system that controls the test and assigns verdicts.
• Parallel Test Component (PTC) - A companion test component used to handle other interfaces during multi-party testing.

Who uses SIST EN 301 068-6 V1.2.1:2003?

Test laboratories use SIST EN 301 068-6 V1.2.1:2003 to run conformance assessments and complete the PCTR. Test realizers use it to build an Executable Test Suite (ExTS) and the Means Of Testing (MOT). Equipment vendors, network operators and clients use it when they need to verify that a DSS2 network implementation matches EN 301 068-1 at the relevant user-network interface.

What changed in SIST EN 301 068-6 V1.2.1:2003 from the previous edition?

The document history records version V1.2.1 with publication in August 2002, following an Open Approval Procedure from April to August 2002. The scope describes this version as an upgrade of the test specification.

Which standards are used with SIST EN 301 068-6 V1.2.1:2003?

• EN 301 068-1 - Gives the protocol specification for ATM transfer capability and traffic parameter indication.
• EN 301 068-2 - Gives the PICS proforma used with the protocol specification.
• EN 300 443-1 - Provides related B-ISDN DSS2 layer 3 protocol specification for basic call/bearer control.
• EN 300 443-2 - Provides the related PICS proforma for that basic call/bearer control part.
• ISO/IEC 9646-1 - Supplies the general conformance testing concepts and definitions.
• ISO/IEC 9646-2 - Covers ATS specification and the abstract test method framework.
• ISO/IEC 9646-3 - Covers TTCN, the notation used for the ATS.
• ISO/IEC 9646-4 - Covers test realization and executable test suites.
• ISO/IEC 9646-5 - Covers requirements on test laboratories and clients.
• ITU-T I.413 - Defines the B-ISDN user-network interface reference point used by the scope.

What does the SIST EN 301 068-6 V1.2.1:2003 document contain?

Annex A provides a completed-style PCTR form with identification details, conformance status, static and dynamic summaries, test campaign reporting and observations. Annex B provides the partial PIXIT form, including test laboratory data, SUT description, protocol identification, configuration questions, timer values and parameter values.

Annex C contains the ATS itself in two TTCN forms: TTCN.GR and TTCN.MP. The ATS is accompanied by a test suite overview part, and the document notes that the two TTCN forms are considered equivalent.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 068-6 Version 1.2.1SIST EN 301 068-6 V1.2.1:2003en01-november-2003SIST EN 301 068-6 V1.2.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 301 068-6 V1.2.1 (2002-08) 2
Reference REN/SPAN-130275-6 Keywords ATM, ATS, B-ISDN, DSS2, network, PIXIT, testing, UNI ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: [e-mail] Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2002. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 301 068-6 V1.2.1:2003

ETSI ETSI EN 301 068-6 V1.2.1 (2002-08) 3
Contents Intellectual Property Rights.5 Foreword.5 1 Scope.6 2 References.6 3 Definitions and abbreviations.7 3.1 Definitions.7 3.1.1 Definitions related to conformance testing.7 3.1.2 Definitions related to EN 301 068-1.7 3.2 Abbreviations.8 4 Abstract Test Method (ATM).8 4.1 Description of ATM used.8 4.2 Conventions for test components and PCOs.9 5 Untestable Test Purposes.10 6 ATS to TP map.10 7 PCTR conformance.10 8 PIXIT conformance.11 9 ATS Conformance.11 Annex A (normative): Protocol Conformance Test Report (PCTR) proforma.12 A.1 Identification summary.12 A.1.1 Protocol conformance test report.12 A.1.2 IUT identification.12 A.1.3 Testing environment.12 A.1.4 Limits and reservations.13 A.1.5 Comments.13 A.2 IUT Conformance status.13 A.3 Static conformance summary.13 A.4 Dynamic conformance summary.14 A.5 Static conformance review report.14 A.6 Test campaign report.14 A.7 Observations.15 Annex B (normative): Partial PIXIT proforma.16 B.1 Identification summary.16 B.2 Abstract test suite summary.16 B.3 Test laboratory.16 B.4 Client (of the Test Laboratory).17 B.5 SUT.17 B.6 Protocol information.18 B.6.1 Protocol identification.18 B.6.2 Configuration to be tested.18 B.6.3 Test management timers.18 B.6.4 Parameter Values.19 SIST EN 301 068-6 V1.2.1:2003

ETSI ETSI EN 301 068-6 V1.2.1 (2002-08) 4
Annex C (normative): Abstract Test Suite (ATS).20 C.1 The TTCN Graphical form (TTCN.GR).20 C.2 The TTCN Machine Processable form (TTCN.MP).20 Annex D (informative): Bibliography.21 History.22
ETSI ETSI EN 301 068-6 V1.2.1 (2002-08) 5
Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Services and Protocols for Advanced Networks (SPAN). The present document is part 6 of a multi-part deliverable covering the Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication, as identified below: Part 1: "Protocol specification [ITU-T Recommendations Q.2961.1 (1995), Q.2961.2 (1997), Q.2961.3 (1997), Q.2961.4 (1997), Q.2961.6 (1998), modified]"; Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification"; Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user"; Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user"; Part 5: "Test Suite and Test Purposes (TSS&TP) specification for the network"; Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network".
National transposition dates Date of adoption of this EN: 2 August 2002 Date of latest announcement of this EN (doa): 30 November 2002 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2003 Date of withdrawal of any conflicting National Standard (dow): 31 May 2003
ETSI ETSI EN 301 068-6 V1.2.1 (2002-08) 6
1 Scope The present document specifies the network Abstract Test Suite (ATS) for the TB reference point or coincident SB and TB reference point (as defined in ITU-T Recommendation I.413 [6]) of implementations conforming to the standards for the signalling user-network layer 3 specification for ATM transfer capability and traffic parameter indication of the Digital Subscriber Signalling System No. two (DSS2) protocol for the pan-European Broadband Integrated Services Digital Network (B-ISDN), EN 301 068-1 [1]. A further part of the present document specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT proforma. Other parts specify the TSS&TP and the ATS and partial PIXIT proforma for the User side of the TB reference point or coincident SB and TB reference point of implementations conforming to EN 301 068-1 [1]. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. [1] ETSI EN 301 068-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 1: Protocol specification [ITU-T Recommendations Q.2961.1 (1995), Q.2961.2 (1997), Q.2961.3 (1997), Q.2961.4 (1997) and Q.2961.6 (1997), modified]". [2] ETSI EN 301 068-2: "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification". [3] ISO/IEC 9646-1 (1994): "Information technology; Open Systems Interconnection; Conformance testing methodology and framework; Part 1: General concepts". [4] ISO/IEC 9646-2 (1994): "Information technology; Open Systems Interconnection; Conformance testing methodology and framework; Part 2: Abstract Test Suite specification". [5] ISO/IEC 9646-3: "Information technology; Open Systems Interconnection; Conformance testing methodology and framework; Part 3: The Tree and Tabular Combined Notation (TTCN)". [6] ITU-T Recommendation I.413 (1993): "B-ISDN user-network interface". [7] ETSI EN 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 1: Protocol specification [ITU-T Recommendation Q.2931 (1995), modified]". [8] ISO/IEC 9646-4: "Information technology; Open Systems Interconnection; Conformance testing methodology and framework; Part 4: Test realization". [9] ISO/IEC 9646-5: "Information technology; Open Systems Interconnection; Conformance testing methodology and framework; Part 5: Requirements on test laboratories and clients for the conformance assessment process". SIST EN 301 068-6 V1.2.1:2003

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[10] ETSI EN 300 443-2: "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Parts 2: Protocol Implementation Conformance Statement (PICS) proforma specification". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in EN 301 068-1 [1], EN 300 443-1 [7] and the following apply: 3.1.1 Definitions related to conformance testing Abstract test case: See ISO/IEC 9646-1 [3]. Abstract Test Method (ATM): See ISO/IEC 9646-1 [3]. Abstract Test Suite (ATS): See ISO/IEC 9646-1 [3]. Implementation Under Test (IUT): See ISO/IEC 9646-1 [3]. System Under Test (SUT): See ISO/IEC 9646-1 [3]. Upper Tester (UT): See ISO/IEC 9646-1 [3]. Lower tester: See ISO/IEC 9646-1 [3]. Protocol Implementation Conformance Statement (PICS): See ISO/IEC 9646-1 [3]. PICS proforma: See ISO/IEC 9646-1 [3]. Protocol Implementation eXtra Information for Testing (PIXIT): See ISO/IEC 9646-1 [3]. PIXIT proforma: See ISO/IEC 9646-1 [3]. Test Purpose (TP): See ISO/IEC 9646-1 [3]. Point of Control and Observation (PCO): See ISO/IEC 9646-1 [3]. 3.1.2 Definitions related to EN 301 068-1 network: DSS2 protocol entity at the Network side of the user-network interface where a TB reference point or coincident SB and TB reference point applies network (SB/TB): DSS2 protocol entity at the Network side of the user-network interface where a coincident SB and TB reference point applies network (TB): DSS2 protocol entity at the Network side of the user-network interface where a TB reference point applies (user is the private ISDN) SIST EN 301 068-6 V1.2.1:2003

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3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ATM Abstract Test Method ATS Abstract Test Suite B-ISDN Broadband Integrated Services Digital Network
CM Co-ordinate Message CR Call Reference DSS2 Digital Subscriber Signalling System No. two ExTS Executable Test Suite IE_AI Information element Action Indicator IE_flag Information element instruction indicator flag IUT Implementation Under Test LT Lower Tester
MOT Means Of Testing PCO Point of Control and Observation PDU Protocol Data Unit PICS Protocol Implementation Conformance Statement PIXIT Protocol Implementation eXtra Information for Testing SUT System Under Test TP Test Purpose TSS Test Suite Structure TTCN Tree and Tabular Combined Notation UT Upper Tester VC Virtual Channel VCI Virtual Channel Identifier VP Virtual Path VPC Virtual Path Connection VPCI Virtual Path Connection Identifier 4 Abstract Test Method (ATM) 4.1 Description of ATM used The requirement for testing the network IUT is to focus on the behaviour of the network IUT at the user-network interface where a TB reference point or coincident SB and TB reference point applies. Thus the IUT is the network DSS2 protocol entity at a particular user-network interface and is not the whole network. It is possible to specify an ATS based on a Single party (remote) test method for such an IUT. However, it is considered that an ATS based on such an approach is of limited use as the only way to specify IUT generated PDUs is to use the "implicit send" statement. Many users of such an ATS would replace the "implicit send" statements with descriptions of the behaviour at other interfaces. An ATS based on a multi-party test method is considered to be more useful in that it is closer to how a real test suite would be constructed. Such a test method specifies behaviour at multiple network interfaces. One very important limitation here is that tests are focussed on one particular interface. Thus the test system is made up one Main Test Component (MTC) and one or more Parallel Test Components (PTC), see figure 1. SIST EN 301 068-6 V1.2.1:2003

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4.2 Conventions for test components and PCOs
Master part
Slave part
MTCA
PTC1
A1 (CP)
L0 (PCO)
L1 (PCO)
IUT
NETWORK
Figure 1: Multi-party test method In a master/slave arrangement, the MTC is considered to be the master while the PTCs are the slaves. The "slave" testers are only an explicit description of how to deal with the remote interfaces during the testing process, i.e. "how to make the IUT send the required message". This means, in particular, that the verdict will only be assigned from the protocol aspects observed on the interface under test (i.e. by the "master" tester), as it would be observed by a terminal connected to this interface. A failure in the correlation between the protocol at the different interfaces to which the different testers are connected, i.e. in the mechanism of the functional service itself, will not cause a FAIL verdict. For instance, if the IUT fails to send a message on the tested interface after another interface has received the proper stimulus, the verdict will be INCONCLUSIVE. The MTC MTCA has two functions in this configuration. Firstly, it has the MTC function of controlling the one or more PTCs. Thus it is responsible for starting the PTCs and afterwards co-ordinates activities by exchanging Co-ordination Messages (CM) with the PTCs. Secondly it is responsible for the behaviour of the Lower Tester (LT) at PCO L0. A combination of the remote and multi-party test methods is applied. As can be seen from figure 1, several PCOs are used. All PCOs reside at the service access points between layers 2 and 3. SIST EN 301 068-6 V1.2.1:2003

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MTC
SUT
PTC1
Layer 3  Layer 2  Layer 1
L0


IUT 








L1 

Layer 3  Layer 2  Layer 1
Service provider
Figure 2: Combination of the remote and multi-party test methods The MTC PCO is named "L0" ("L" for Lower). The L0 PCO is used to control and observe the behaviour of the IUT and test case verdicts are assigned depending on the behaviour observed at this PCO. The PTCs PTC1, PTC2 etc. use PCOs L1, L2, etc. These PCOs are used to control and, in a limited way, observe the behaviour of the network equipment at interfaces other than the one under test. No verdicts are assigned at these PCOs. As stated in a previous paragraph, the non-receipt of network generated messages at L0, which are stimulated by events at the L1, L2, etc., will result in INCONCLUSIVE rather than FAIL verdicts being assigned. PTC2 is only activated in that test cases that test the procedures at the access between a root user and the IUT, when more than one party is involved in the call between the root user and the IUT. In test cases which verify that the IUT rejects invalid or unacceptable SETUP messages, no PTC is activated at all, as these rejection procedures are considered local to the access between IUT and MTC. 5 Untestable Test Purposes There are no untestable Test Purposes associated with this ATS. 6 ATS to TP map The identifiers used for the TPs are reused as test case names. Thus there is a straightforward one-to-one mapping. 7 PCTR conformance A test laboratory, when requested by a client to produce a PCTR, is required, as specified in ISO/IEC 9646-5 [9], to produce a PCTR conformant with the PCTR template given in annex B of ISO/IEC 9646-5 [9].
Furthermore, a test laboratory, offering testing for the ATS specification contained in annex C, when requested by a client to produce a PCTR, is required to produce a PCTR conformant with the PCTR p
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