ETSI TS 186 007-3 V1.1.1 (2008-09)

ETSI TS 186 007-3 V1.1.1 (2008-09)
Technical Specification

Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Communication HOLD (CH);
Part 3: Abstract Test Suite (ATS) and partial
Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification



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2 ETSI TS 186 007-3 V1.1.1 (2008-09)



Reference
DTS/TISPAN-06021-3-NGN-R1
Keywords
ATS, SIP, ISUP, testing, TTCN, PIXIT, HOLD
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ETSI

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3 ETSI TS 186 007-3 V1.1.1 (2008-09)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
2.1 Normative references.6
2.2 Informative references.8
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.9
4 Abstract Test Method (ATM).10
4.1 Network architecture.10
4.2 Protocol architecture.11
4.3 Test architecture.12
4.3.1 Interconnection of TS and SUT .12
4.3.2 Test system architecture.12
4.3.2.1 General.12
4.3.2.2 Structure.12
4.3.2.3 Interaction between TTCN-3 Executable (TE) and SUT Adapter (SA).13
4.3.2.3.1 Control of the SUT Adapter (SA) by using ASPs .13
4.3.2.3.2 Sending and receiving SIP and ISUP/BICC messages .17
4.3.2.3.3 Logging conventions.19
5 The ATS development process.20
5.1 Requirements and Test Purposes.20
5.2 ATS structure.20
5.2.1 Test case grouping .20
5.2.2 Test case identifiers .20
5.3 ATS specification framework.21
5.3.1 ATS Library.21
5.3.2 Use of TTCN-3.22
5.3.2.1 General.22
5.3.2.2 TTCN-3 naming conventions.22
5.4 ATS archive.24
Annex A (normative): Partial PIXIT proforma .25
A.1 Introduction.25
A.2 PIXIT items.25
A.2.1 SIP-related PIXIT.25
A.2.2 ISUP/BICC-related PIXIT.28
Annex B (informative): TTCN-3 library modules.32
B.1 Electronic annex, zip file with TTCN-3 code .32
History .33

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4 ETSI TS 186 007-3 V1.1.1 (2008-09)
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 Technical Specification (TS) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
The present document is part 3 of a multi-part deliverable covering Communication HOLD, as identified below:
Part 1: "Protocol Implementation Conformance Statement (PICS)";
Part 2: "Test Suite Structure and Test Purposes (TSS&TP)";
Part 3: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing
(PIXIT) proforma specification".
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5 ETSI TS 186 007-3 V1.1.1 (2008-09)
1 Scope
The present document specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information
for Testing (PIXIT) proforma based on the Test suite Structure and Test purposes defined in TS 186 007-2 [3].
The TSS&TP have been developed to test the communication HOLD PSTN/IDSN simulation services.
The test notation used in the ATS is TTCN-3 (ES 201 873-1 [8]).
The following test specification and design considerations can be found in the body of the present document:
• the overall test suite structure;
• the testing architecture;
• the test methods and port definitions;
• the test configurations;
• the design principles, assumptions, and used interfaces to the TTCN3 tester (System Simulator);
• TTCN styles and conventions;
• the partial PIXIT proforma;
• the modules containing the TTCN-3 ATS.
Annex A provides the Partial Implementation Extra Information for Testing (IXIT) Proforma of the ATS.
Annex B provides the Testing and Test Control Notation (TTCN-3) part of the ATS.
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE 1: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
NOTE 2: References have been used both in the present document and in the TTCN-3 library modules (annex B).
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6 ETSI TS 186 007-3 V1.1.1 (2008-09)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 183 010: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Signalling Control Protocol; Communication HOLD
(HOLD) PSTN/ISDN simulation services; Protocol specification".
[2] ETSI TS 186 007-1: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Communication HOLD (CH); Part 1: Protocol Implementation
Conformance Statement (PICS)".
[3] ETSI TS 186 007-2: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Communication HOLD (CH); Part 2: Test Suite Structure and
Test Purposes (TSS&TP)".
[4] ETSI TS 186 002-4: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Interworking between Session Initiation Protocol (SIP) and
Bearer Independent Call Control Protocol (BICC) or ISDN User Part (ISUP); Part 4: Abstract Test
Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) for Profile
A and B".
[5] ETSI EN 383 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Interworking between Session Initiation Protocol (SIP) and
Bearer Independent Call Control (BICC) Protocol or ISDN User Part (ISUP)
[ITU-T Recommendation Q.1912.5, modified]".
[6] ETSI TS 102 027-3 (V3.1.1): "Methods for Testing and Specification (MTS); Conformance Test
Specification for SIP (IETF RFC 3261); Part 3: Abstract Test Suite (ATS) and partial Protocol
Implementation eXtra Information for Testing (PIXIT) proforma".
[7] ETSI TS 102 351 (V2.1.1): "Methods for Testing and Specification (MTS); Internet Protocol
Testing (IPT); IPv6 Testing: Methodology and Framework".
[8] ETSI ES 201 873-1 (V3.1.1): "Methods for Testing and Specification (MTS); The Testing and
Test Control Notation version 3; Part 1: TTCN-3 Core Language".
[9] ETSI ES 201 873-5 (V3.1.1): "Methods for Testing and Specification (MTS); The Testing and
Test Control Notation version 3; Part 5: TTCN-3 Runtime Interface (TRI)".
[10] ETSI ES 201 873-6 (V3.1.1): "Methods for Testing and Specification (MTS); The Testing and
Test Control Notation version 3; Part 6: TTCN-3 Control Interface (TCI)".
[11] ETSI TS 181 002: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Multimedia Telephony with PSTN/ISDN simulation services".
[12] ETSI ES 283 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IP Multimedia Call Control Protocol based on Session
Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3
[3GPP TS 24.229 [Release 7], modified]".
[13] ETSI ES 283 027: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Endorsement of the SIP-ISUP Interworking between the IP
Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks
[3GPP TS 29.163 (Release 7), modified]".
[14] ISO/IEC 9646-1 (1994): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework - Part 1: General concepts".
[15] ISO/IEC 9646-2 (1994): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework - Part 2: Abstract Test Suite specification".
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7 ETSI TS 186 007-3 V1.1.1 (2008-09)
[16] ISO/IEC 9646-3 (1998): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework - Part 3: The Tree and Tabular Combined Notation (TTCN)".
[17] ISO/IEC 9646-5 (1994): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework - Part 5: Requirements on test laboratories and clients for the
conformance assessment process".
[18] ISO/IEC 9646-7 (1995): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework - Part 7: Implementation Conformance Statements".
[19] ITU-T Recommendation Q.1912.5 (2004): "Interworking between Session Initiation Protocol
(SIP) and Bearer Independent Call Control protocol or ISDN User Part".
[20] ITU-T Recommendation Q.2150.1 (2001): "Signalling Transport Converter on MTP3 and
MTP3b".
[21] ITU-T Recommendation E.164 (2005): "The international public telecommunication numbering
plan".
[22] ITU-T Recommendation Q.761 (1999): "Signalling System No.7 - ISDN User Part functional
description".
[23] ITU-T Recommendation Q.762 (1999): "Signalling System No.7 - ISDN User Part general
functions of messages and signals".
[24] ITU-T Recommendation Q.763 (1999): "Signalling System No.7 - ISDN User Part formats and
codes".
[25] ITU-T Recommendation Q.764 (1999): "Signalling System No.7 - ISDN User Part signalling
procedures".
[26] ITU-T Recommendation Q.732.4 (1999): "Stage 3 description for call offering supplementary
services using Signalling System No. 7: Call Forwarding Unconditional (CFU)".
[27] ITU-T Recommendation Q.733.2 (1993): "Stage 3 description for call completion supplementary
services using Signalling System No. 7: Call hold (HOLD)".
[28] ITU-T Recommendation Q.850 (1998): "Usage of cause and location in the Digital Subscriber
Signalling System No. 1 and the Signalling System No. 7 ISDN User Part".
[29] ITU-T Recommendation Q.9: "Vocabulary of switching and signalling terms".
[30] IETF RFC 3261 (2002): "SIP: Session Initiation Protocol".
[31] IETF RFC 4566 (2006): "SDP: Session Description Protocol".
[32] IETF RFC 3986: "Uniform Resource Identifier (URI): Generic Syntax".
[33] IETF RFC 2617 (1999): "HTTP Authentication: Basic and Digest Access Authentication".
[34] IETF RFC 3966 (2004): "The tel URI for Telephone Numbers".
[35] IETF RFC 3262 (2002): "Reliability of Provisional Responses in the Session Initiation Protocol
(SIP)".
[36] IETF RFC 3264 (2002): "An Offer/Answer Model with the Session Description Protocol (SDP)".
[37] IETF RFC 3311 (2002): "The Session Initiation Protocol (SIP) UPDATE Method".
[38] IETF RFC 3312 (2002): "Integration of Resource Management and Session Initiation Protocol
(SIP)".
[39] IETF RFC 3323 (2002): "A Privacy Mechanism for the Session Initiation Protocol (SIP)".
[40] IETF RFC 3515: "The Session Initiation Protocol (SIP) Refer Method".
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8 ETSI TS 186 007-3 V1.1.1 (2008-09)
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
Not applicable.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in SIP/ISUP interworking reference
specification [5], ISDN User Part (ISUP) reference specifications [22] to [25], ISO/IEC 9646-1 [14],
ISO/IEC 9646-7 [18], (TTCN-3) ES 201 873-1 [8] and the following] apply:
Abstract Test Case (ATC): complete and independent specification of the actions required to achieve a specific test
purpose, defined at the level of abstraction of a particular Abstract Test Method, starting in a stable testing state and
ending in a stable testing state
Abstract Test Method (ATM): description of how an IUT is to be tested, given at an appropriate level of abstraction to
make the description independent of any particular realization of a Means of Testing, but with enough detail to enable
abstract test cases to be specified for this method
Abstract Test Suite (ATS): test suite composed of abstract test cases
address identity: See ITU-T Recommendation E.164 [21] or/and RFC 3966 [34].
call: See ITU-T Recommendation Q.9 [29], definition 2201.
call state: state as defined in clause 2.1 of the present document, for either the user side or network side as appropriate
NOTE: A call state may exist for each call reference value (and at the network side for each additional responding
CEI in the incoming call states).
identity information: includes all the information (RFC 3966 [34]/RFC 3986 [32]/ITU-T Recommendation
E.164 [21]) identifying a user, including trusted (network generated) and/or untrusted (user generated) addresses
Implementation Under Test (IUT): implementation of one or more OSI protocols in an adjacent user/provider
relationship, being part of a real open system which is to be studied by testing
SIP number: number conforming to the numbering and structure specified in ITU-T Recommendation E.164 [21]
Means of Testing (MOT): combination of equipment and procedures that can perform the derivation, selection,
parameterization and execution of test cases, in conformance with a reference standardized ATS, and can produce a
conformance log
PICS proforma: document, in the form of a questionnaire, which when completed for an implementation or system
becomes the PICS
PIXIT proforma: document, in the form of a questionnaire, which when completed for the IUT becomes the PIXIT
Point of Control and Observation: point within a testing environment where the occurrence of test events is to be
controlled and observed, as defined in an Abstract Test Method
Pre-test condition : setting or state in the IUT which cannot be achieved by providing stimulus from the test
environment
Protocol Implementation Conformance Statement (PICS): statement made by the supplier of a protocol claimed to
conform to a given specification, stating which capabilities have been implemented
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9 ETSI TS 186 007-3 V1.1.1 (2008-09)
Protocol Implementation eXtra Information for Testing (PIXIT): statement made by a supplier or implementor of
an IUT (protocol) which contains or references all of the information related to the IUT and its testing environment,
which will enable the test laboratory to run an appropriate test suite against the IUT
supplementary service: service that modifies or supplements a basic Telecommunication service
System Under Test (SUT): real open system in which the IUT resides
trusted identity: network generated user address information
untrusted identity: user generated user address information
voice session: existing voice connection between two terminal equipments
EXAMPLE: Via RTP.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in table 2 of ITU-T Recommendation Q.762 [23]
(ISUP messages) and the following apply:
NOTE: Abbreviations have been used both in the present document and in the TTCN-3 library modules
(annex B).
ASP Abstract Service Primitive
NOTE: Exchanged between entities inside the TS or between the user of the ATS (operator) and the TS.
ATC Abstract Test Case
ATM Abstract Test Method
ATP Access Transport Parameter
ATS Abstract Test Suite
BC Bearer Capability
BCI Backward Call Indicators
CIC Circuit Identification Code
CPS Calling Party's Category
CN Core Network
CS Circuit Switched
DSS1 Digital Subscriber System No. 1
ETS Executable Test Suite
FCI Forward Call Indicators
HOLD Communication session Hold
HLC High Layer Compatibility
ICS Implementation Conformance Statement
IE Information Element
IETF Internet Engineering Task Force
IM IP Multimedia
IP Internet Protocol
ISDN Integrated Services Digital Network
ISUP ISDN User Part
IUT Implementation Under Test
IWU Interworking Unit
LLC Low Layer Compatibility
LT Lower Tester
MOT Means Of Testing
MTC Main Test Component
MTP Message Transfer Part
NCI Nature of Connection Indicators
NGN Next Generation Network
NNI Network-Network Interface
OBCI Optional Backward Call Indicators
OLE Originating Local Exchange
PA Platform Adapter
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10 ETSI TS 186 007-3 V1.1.1 (2008-09)
PCO Point of Control and Observation
PCTR Protocol Conformance Test Report
PDU Protocol Data Unit
NOTE: Message exchanged between TS and SUT at a signalling interface.
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
PSTN Public Switch Telephone Network
PTC Parallel Test Component
SA SUT Adapter
SDP Session Description Protocol
SIP Session Initiation Protocol
SN Signalling Node
SS#7 Signalling System No. 7
STC Signalling Transport Converter
NOTE According to ITU-T Recommendation Q.2150.1 [20].
SUT System Under Test
TC Test Case
TCI TTCN-3 Control Interface
TCP Test Coordination Procedures
TD Test Description
TE Test Equipment
TISPAN Telecommunications and Internet converged Services and Protocols for Advanced Networking
TL Test Logging
TMR Transmission Medium Requirement
TMU Transmission Medium Used
TP Test Purpose
TRI TTCN-3 Runtime Interface
TS Test System
TSS Test Suite Structure
TSS&TP Test Suite Structure and Test Purposes
TTCN Tree and Tabular Combined Notation
TTCN-3 Testing and Test Control Notation edition 3
UE User Equipment
4 Abstract Test Method (ATM)
4.1 Network architecture
Two different network configurations have been assumed in the scope of the test purpose description defined in
TS 186 007-2 [3], SIP-SIP and SIP-ISUP. The test purposes from the latter configuration are also covered in
TS 186 002-4 [4]; they have been adopted and integrated to the present document and its related TTCN-3 test code
specification.
Figures 1 and 2 show the network architecture for SIP-SIP and SIP-ISUP configuration.
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11 ETSI TS 186 007-3 V1.1.1 (2008-09)
Figure 1 shows the network architecture for SIP-SIP UE Interworking.


SIP SIP

<-----------------------------------------> IMS <------------------------------------------>





Figure 1: Interworking between two SIP UEs
Figure 2 shows the network architecture for SIP-ISUP Interworking.


SIP ISUP
<-----------------------------------------> IMS / IWU <------------------------------------------>




Figure 2: Interworking between SIP and ISUP
4.2 Protocol architecture
Figures 1 and 2 show that there are two configurations of the SUT (representing the SUT in the testing environment
described in the present document): a SIP UE interface and either a second SIP UE or an ISUP- or BICC interface.
Since the ISUP and BICC protocols are very similar (the latter one being derived from ISUP), they are treated here as
one protocol.
NOTE: No signalling is used within the SIP-ISUP-Interworking ATS to control the ATM bearer in case of BICC
(ASPs are used).
Figure 3 shows the protocol architecture regarding the two interfaces.
SUT



IUT IUT
SIP ISUP BICC

  STC STC
UDP TCP

  MTP 3 MTP 3b


IP MTP Layer 2 AAL


(LAN) G.703/G.704 ATM



Figure 3: Protocol architecture of the SIP and ISUP interfaces
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12 ETSI TS 186 007-3 V1.1.1 (2008-09)
4.3 Test architecture
4.3.1 Interconnection of TS and SUT
Figure 4 shows the interconnection of TS and SUT in terms of signalling message flows.



SIP ISUP/
SUT
BICC
<------------------------>
<------------------------> IWU
<------------------------>
  ATM bearer control
(only for BICC)



Test

System

Figure 4: Interconnection of TS and SUT
4.3.2 Test system architecture
4.3.2.1 General
Test systems that implement this ATS shall conform to the requirements as defined in this clause.
4.3.2.2 Structure
An abstract architecture for a test system (TS) implementing a TTCN-3 ATS is displayed in figure 5 and also stated in
ES 201 873-5 [9].
Test Management (TM)
Test Control (TC) Test Logging (TL)

TCI



TTCN-3 Executable (TE)
TTCN-3 Runtime System (T3RTS)
  Executable Test Suite (ETS)
Encoding/Decoding System


TRI



SUT Adapter (SA) Platform Adapter (PA)


Figure 5: Abstract Test System Architecture
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13 ETSI TS 186 007-3 V1.1.1 (2008-09)
A TS has two interfaces, the TTCN-3 Control Interface (TCI) and the TTCN-3 Runtime Interface (TRI), which specify
the interface between Test Management (TM) and TTCN-3 Executable (TE) entities, and TE, SUT Adapter (SA) and
Platform Adapter (PA) entities, respectively. Out of these two interfaces the TRI has been standardized in
ES 201 873-5 [9], whereas the specification and implementation of the TCI is in ES 201 873-6 [10].
The part of TS that deals with interpretation and execution of TTCN-3 modules, i.e. the Executable Test Suite (ETS), is
shown as part of the TTCN-3 Executable (TE). This ETS corresponds eit
...