SIST EN 301 455-2 V1.3.1:2005

• Abstract:

  ATS PIXITfor CTM incoming call handling.

• Status: Published
• Publication Date: 31-Mar-2005
• ICS: 33.040.35 - Telephone networks
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Mandate: T-326
• Ref Project: ETSI EN 301 455-2 V1.3.1 (2000-12) - Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Cordless Terminal Mobility (CTM); Incoming call additional network feature for the VPN b service entry point; Part 2: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma

SIST EN 301 455-2 V1.3.1:2005 is the Slovenian edition of an ETSI standard for testing the Cordless Terminal Mobility (CTM) incoming call additional network feature at the VPN "b" service entry point. It specifies an Abstract Test Suite (ATS) and a partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for implementations of ANF-CTMI. Test laboratories, test realisers, and implementers use it to define, prepare, and report conformance tests for this signaling function.

What does SIST EN 301 455-2 V1.3.1:2005 specify?

SIST EN 301 455-2 V1.3.1:2005 specifies the ATS and partial PIXIT proforma for the VPN "b" reference point of implementations that conform to the Cordless Terminal Incoming Call Additional Network Feature (ANF-CTMI). In practice, that means the document is about how to test CTM incoming call handling, not about the service behavior itself.

The document is organized into clauses for scope, references, definitions and abbreviations, the abstract test method, untestable test purposes, ATS conventions, the ATS-to-test-purpose map, and conformance rules for PCTR, PIXIT, and ATS. It also contains three normative annexes with the reporting template, the PIXIT proforma, and the ATS.

Annex	What it covers
A	Protocol Conformance Test Report (PCTR) proforma
B	Partial PIXIT proforma
C	Abstract Test Suite (ATS) in TTCN.GR and TTCN.MP forms

What are the key requirements of SIST EN 301 455-2 V1.3.1:2005?

SIST EN 301 455-2 V1.3.1:2005 focuses on how to structure and run conformance tests so that different laboratories produce comparable results. The main practical requirement is to use the test suite and reporting forms exactly as specified, with the same technical meaning and traceability.

Clause 4 - the test method

SIST EN 301 455-2 V1.3.1:2005 uses a multi-party test method. The test setup includes a Main Test Component (MTC), Parallel Test Component (PTC) processes, and several Points of Control and Observation (PCOs), named L0, L1, L2, and O. This matters because the verdict depends on what the tester can observe at those control points, while the O point is used to instruct the operator without using those operator actions for verdicts.

Clause 5 - untestable test purposes

SIST EN 301 455-2 V1.3.1:2005 marks one test purpose, CTMI_Visitor01_001, as untestable because the operator receive event cannot be controlled by the test system. For a lab, this means not every abstract test purpose can be executed automatically, and such cases must be handled as identified exceptions.

Clause 6 - ATS conventions

SIST EN 301 455-2 V1.3.1:2005 uses the TTCN version defined in TR 101 101 and combines TTCN with ASN.1 where needed. The document also sets encoding rules: the default is the ISDN-style "Direct Encoding" for ASN.1 constraints, while BER is used only when explicitly indicated, and all ASN.1 constraints of type "Component" use BER. This matters when building an executable test suite, because the wrong encoding rule would make the test data incompatible with the implementation under test.

Clause 7 - test purpose mapping

SIST EN 301 455-2 V1.3.1:2005 reuses the test purpose identifiers as test case names, so the mapping from test purposes to test cases is one-to-one. That gives clear traceability between the design intent and the executable tests.

Clauses 8 to 10 - conformance rules

SIST EN 301 455-2 V1.3.1:2005 requires a PCTR that conforms to the annex A proforma when a laboratory reports results, and a PIXIT proforma that is technically equivalent to annex B when a test realiser or laboratory prepares testing for an IUT. It also requires any ETS to be technically equivalent to the ATS in annex C, with all abstract test events realizable in the executable test case. In practice, extra checks may exist in the test system, but they do not count toward the verdict.

What terms does SIST EN 301 455-2 V1.3.1:2005 define?

SIST EN 301 455-2 V1.3.1:2005 uses the definitions from ISO/IEC 9646 and then relies on a set of standard testing terms.

• Abstract Test Suite (ATS) - the abstract, formal set of test cases that defines what to test.
• Protocol Implementation eXtra Information for Testing (PIXIT) - implementation-specific details needed to prepare and run the tests.
• Protocol Conformance Test Report (PCTR) - the report form used to record conformance test results.
• Implementation Under Test (IUT) - the implementation being assessed for conformance.
• System Under Test (SUT) - the system environment that contains the IUT during testing.
• Point of Control and Observation (PCO) - a place where the tester can control or observe behavior.
• Tree and Tabular Combined Notation (TTCN) - the notation used to write the ATS.

Who uses SIST EN 301 455-2 V1.3.1:2005?

SIST EN 301 455-2 V1.3.1:2005 is used by test laboratories, test realisers, and clients who commission conformance testing. It is also relevant to implementers of ANF-CTMI at the VPN "b" service entry point, because the ATS and PIXIT tell them what their equipment must support for testing.

In practice, the document helps these users prepare the Means Of Testing (MOT), populate the PIXIT, run the test campaign, and complete the PCTR. It is most relevant in telecom environments that use Private Integrated Services Network (PISN) inter-exchange signaling for CTM incoming call handling.

Which standards are used with SIST EN 301 455-2 V1.3.1:2005?

SIST EN 301 455-2 V1.3.1:2005 depends on several standards that define the testing framework and the protocol being tested.

• ISO/IEC 9646 (all parts) - provides the conformance testing methodology and framework used throughout the document.
• ETSI TR 101 101 - provides the TTCN interim version, including ASN.1 support, used for the ATS.
• ISO/IEC 8825-1 - defines BER, CER, and DER encoding rules for the ASN.1 parts that use BER.
• ETSI ETS 300 696 - defines the underlying Cordless Terminal Incoming Call additional network feature that the tests exercise.
• ETSI EN 301 455-1 - gives the Test Suite Structure and Test Purposes (TSS&TP) that this ATS follows.

What does the SIST EN 301 455-2 V1.3.1:2005 document contain?

SIST EN 301 455-2 V1.3.1:2005 contains the ATS in both TTCN graphical form and machine-processable form, plus the explanatory text needed to understand how the tests are organized. It also contains the PCTR proforma and the partial PIXIT proforma, each laid out as completion forms for laboratories and clients.

The annexes include tables for identification data, test environment data, IUT and SUT information, timers, parameter values, and information element codings. The ATS annex also points to the accompanying .PDF and .MP files that carry the test suite itself. For a reader preparing conformance testing, these annexes are the parts that turn the protocol description into a usable test package.

SLOVENSKI STANDARD
01-april-2005
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Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Cordless
Terminal Mobility (CTM); Incoming call additional network feature for the VPN b service
entry point; Part 2: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra
Information for Testing (PIXIT) proforma
Ta slovenski standard je istoveten z: EN 301 455-2 Version 1.3.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)
Private Integrated Services Network (PISN);
Inter-exchange signalling protocol;
Cordless Terminal Mobility (CTM);
Incoming call additional network feature
for the VPN "b" service entry point;
Part 2: Abstract Test Suite (ATS) and partial Protocol
Implementation eXtra Information for Testing (PIXIT)
proforma
2 ETSI EN 301 455-2 V1.3.1 (2000-12)
Reference
DEN/SPAN-05194-3
Keywords
ANF, ATS, CTM, mobility, PISN, PSS1, PIXIT,
testing, VPN
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© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI
3 ETSI EN 301 455-2 V1.3.1 (2000-12)
Contents
Intellectual Property Rights .5
Foreword.5
1 Scope.6
2 References.6
3 Definitions and abbreviations.7
3.1 Definitions . 7
3.2 Abbreviations. 7
4 Abstract Test Method (ATM).7
4.1 Description of ATM used . 7
5 Untestable test purposes.8
6 ATS conventions .9
6.1 Version of TTCN used . 9
6.2 Use of ASN.1. 9
6.2.1 Situations where ASN.1 is used. 9
6.2.2 Specification of encoding rules. 9
7 ATS to TP map.10
8 PCTR conformance .10
9 PIXIT conformance .11
10 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. 13
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 System Under Test (SUT).17
B.6 Protocol information.18
B.6.1 Protocol identification . 18
ETSI
4 ETSI EN 301 455-2 V1.3.1 (2000-12)
B.6.2 IUT information . 18
B.6.2.1 Parameter values. 18
B.6.2.2 Configuration of IUT . 18
B.6.2.3 Timer values. 19
B.6.2.4 Information parameter values . 19
B.7 Basic call PIXIT items .20
B.7.1 Parameter values - information element codings. 20
Annex C (normative): Abstract Test Suite (ATS).21
C.1 The TTCN Graphical form (TTCN.GR).21
C.2 The TTCN Machine Processable form (TTCN.MP) .21
Bibliography.22
History .23
ETSI
5 ETSI EN 301 455-2 V1.3.1 (2000-12)
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://www.etsi.org/ipr).
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 2 for a multi-part delivrable covering the Inter-exchange signalling protocol; Cordless
Terminal Mobility (CTM); Incoming call additional network feature for the VPN "b" service entry point, as described
below:
Part 1: "Test Suite Structure and Test Purposes (TSS&TP) specification";
Part 2: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for
Testing (PIXIT) proforma specification".
National transposition dates
Date of adoption of this EN: 8 December 2000
Date of latest announcement of this EN (doa): 31 March 2001
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2001
Date of withdrawal of any conflicting National Standard (dow): 30 September 2001
ETSI
6 ETSI EN 301 455-2 V1.3.1 (2000-12)
1 Scope
This second part of EN 301 455 specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra
Information for Testing (PIXIT) proforma for the VPN "b" reference point of implementations conforming to the
standard for the Cordless Terminal Incoming Call Additional Network Feature (ANF-CTMI).
EN 301 455-1 [5] specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT
proforma specification.
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, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, subsequent revisions do apply.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] ISO/IEC 9646 (all parts): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework".
[2] ETSI TR 101 101 (V1.1.1): "Methods for Testing and Specification (MTS); TTCN interim version
including ASN.1 1994 support [ISO/IEC 9646-3] (Second Edition Mock-up for JTC1/SC21
Review)".
[3] ISO/IEC 8825-1: "Information technology - ASN.1 encoding rules: Specification of Basic
Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules
(DER)" (See also ITU-T Recommendation X.690)".
[4] ETSI ETS 300 696 (1996): "Private Integrated Services Network (PISN); Inter-exchange
signalling protocol; Cordless Terminal Incoming Call additional network feature".
[5] ETSI EN 301 455-1 (V1.1.4): "Private Integrated Services Network (PISN); Inter-exchange
signalling protocol; Cordless Terminal Incoming Call additional network feature (ANF-CTMI) for
the VPN b service entry point; Part 1: Test Suite Structure and Test Purposes (TSS&TP)
specification".
ETSI
7 ETSI EN 301 455-2 V1.3.1 (2000-12)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ISO/IEC 9646 [1] apply.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ANF Additional Network Feature
ANF-CTMI Additional Network Feature Incoming CTM Call Handling
ASP Abstract Service Primitive
ATM Abstract Test Method
ATS Abstract Test Suite
BER Basic Encoding Rules
CM Co-ordination Message
ETS Executable Test Suite
IUT Implementation Under Test
LT Lower Tester
MOT Means Of Testing
MTC Main Test Component
PCO Point of Control and Observation
PCTR Protocol Conformance Test Report
PDU Protocol Data Unit
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
PTC Parallel Test Component
SUT System Under Test
TP Test Purpose
TTCN Tree and Tabular Combined Notation
VPN Virtual Private Network
4 Abstract Test Method (ATM)
4.1 Description of ATM used
The multi-party test method is applied for testing the IUT. The general configuration used is shown in figure 1.
A Point of Control and Observation (PCO) resides at the service access point between layers 2 and 3 in the test system.
The PCO used by the MTC is named "L0" (for Lower), the PCO used by the PTC1 is named "L1", and the PCO used by
the PTC2 is named "L2". These PCOs are used to control and observe the behaviour of the Implementation Under Test
(IUT) and test case verdicts are assigned depending on the behaviour observed at these PCOs.
ETSI
8 ETSI EN 301 455-2 V1.3.1 (2000-12)
A fourth "informal" PCO, called "O" (for Operator) is used to specify control but not observation above the IUT; events
at this PCO are never used to generate test case verdicts. Messages sent by the tester at this PCO explicitly indicate to
the operator actions which are to be performed on the SUT. This is regarded as a preferred alternative to the use of the
implicit send event.
MTC CPA3 PTC3
PCO
CPA PTC2 O
PCO
CPA1 PTC L2
PCO PCO
L0 L1
IUT
Figure 1: Multi-party test method
Not all components are used in every test case and the relationship between the IUT and the tester depends on the test
group:
• when the IUT is in the Home, Visitor or Detect (with Home functionality) configuration, the IUT is connected to
the MTC. The verdict depends only on the behaviour observed at the PCO between the IUT and the MTC. The
PCO O is used to specify control above the IUT, using the PTC process;
• when the IUT is in the Rerouting or Detect configuration, the PTC1 and the MTC are both used. The verdict is
assigned by the MTC or the PTC1 depending on the test purpose. The PCO O is used to specify control above
the IUT, using the PTC process;
• when the IUT is the Detect configuration providing Rerouting functionality, PTC1, PTC2 and the MTC are used.
The verdict is assigned by the MTC or the PTCs depending on the test purpose. The PCO O is used to specify
control above the IUT, using the PTC process.
5 Untestable test purposes
The Test Purpose CTMI_Visitor01_001 is untestable because the receive event by the operator (by the CTM User)
cannot be controlled by the test system.
ETSI
9 ETSI EN 301 455-2 V1.3.1 (2000-12)
6 ATS conventions
6.1 Version of TTCN used
The version of TTCN used is that defined in TR 101 101 [2].
6.2 Use of ASN.1
6.2.1 Situations where ASN.1 is used
ASN.1 has been used for three major reasons. First, types defined in ASN.1 can model problems that "pure" TTCN
cannot. For instance, data structures modelling ordered or unordered sequences of data are preferably defined in 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.1 to reproduce the type definitions for remote operation components as specified in the base
standards in ASN.1.
The possibility to use TTCN and ASN.1 in combination is used, i.e. referring to an ASN.1 type from a TTCN type.
6.2.2 Specification of encoding rules
There is a variation in the encoding rules applied to ASN.1 types and constraints specified in this ATS and therefore a
mechanism is needed to differentiate the encoding rules. However the mechanism specified in
ISO/IEC 9646-3/AM2 [1] and in TR 101 101 [2] does not facilitate definition of the encoding rules as needed for this
ATS. A solution is therefore used which is broadly in the spirit of ISOIEC 9646-3/AM2 [1] in which comment fields
have been used as a means of encoding rules.
For ASN.1 used in this ATS, two variations of encoding rules are used. One is the commonly known Basic Encoding
Rules (BER) as specified in ISO/IEC 8825-1 [3]. In the second case the encoding is according to ISDN, i.e. the ASN.1
data types are a representation of structures contained within the ISDN specification (basic call, Generic functional
protocol or individual supplementary service). For example, if octets of an information element are specified in ASN.1
as a SEQUENCE then this should be encoded in an Executable Test Suite (ETS) as any other ISDN information
element specified using tabular TTCN. This ISDN encoding variation is the default encoding rule for this ATS. This
means that all ASN.1 constraint tables are encoded using ISDN (non-BER) encoding unless stated otherwise. BER
encoding should never be applied to an ASN.1 constraint where BER encoding has not been specified. This encoding
rule is sometimes named "Direct Encoding".
For BER encoding, an indication is given in the comments field of the table header. For this ATS such indications
appear in the ASN.1 type constraint declaration tables only. In the first line of the table header comment field, the
notation "ASN1_Encoding: BER"isused.
In this particular ATS all ASN.1 type constraints which are of type "Component" are to be encoded using BER.
ETSI
10 ETSI EN 301 455-2 V1.3.1 (2000-12)
Table 1: ASN.1 type constraint declaration showing use of encoding variation
ASN.1 Type Constraint Declaration
Constraint Name : CtmiEnquiry_inv_R1
ASN.1 Type : Component
Derivation Path :
Encoding Variation :
Comments : ASN1_Encoding: BER
Receive Component: CtmiEnquiry Invoke Component
Description
ctmiEnquiry_Comp
ctmiEnquiry_InvokeComp
{
invokeID ?,
operation_value localValue 54,
argument
{
pisnNumber privatePartyNumber {
privateTypeOfNumber ?,
privateNumberDigits OCTETSTR_TO_NUMERICSTR(PX_CPN_PTC1),
qSIGInfoElement ? }}
Detailed comments :
7 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.
8 PCTR conformance
A test laboratory, when requested by a client to produce a PCTR, is required, as specified in ISO/IEC 9646-5 [1], to
produce a PCTR conformant with the PCTR template given in annex B of ISO/IEC 9646-5 [1].
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 proforma contained in annex A.
A PCTR which conforms to this PCTR proforma specification shall preserve the content and ordering of the clauses
contained in annex A. Clause A.6 of the PCTR may contain additional columns. If included, these shall be placed to the
right of the existing columns. Text in italics may be retained by the test laboratory.
ETSI
11 ETSI EN 301 455-2 V1.3.1 (2000-12)
9 PIXIT conformance
A test realizer, producing an executable test suite for the ATS specification contained in annex C, is required, as
specified in ISO/IEC 9646-4 [1], to produce an augmented partial PIXIT proforma conformant with this partial PIXIT
proforma specification.
An augmented partial PIXIT proforma which conforms to this partial PIXIT proforma specification shall, as a
minimum, have contents which are technically equivalent to annex B. The augmented partial PIXIT proforma may
contain additional questions that need to be answered in order to prepare the Means Of Testing (MOT) for a particular
IUT.
A test laboratory, offering testing for the ATS specification contained in annex C, is required, as specified in
ISO/IEC 9646-5 [1], to further augment the augmented partial PIXIT proforma to produce a PIXIT proforma
conformant with this partial PIXIT proforma specification.
A PIXIT proforma which conforms to this partial PIXIT proforma specification shall, as a minimum, have contents
which are technically equivale
...