ETSI TS 186 011-2 V1.0.0 (2008-04)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS NNI Interworking Test Specifications; Part 2: Test Descriptions for IMS NNI Interworking

DTS/TISPAN-06027-2-NGN

General Information

• Status: Published
• Publication Date: 14-Apr-2008
• Technical Committee: TISPAN 6 - TISPAN Testing
• Current Stage: 12 - Completion
• Due Date: 11-Mar-2008
• Completion Date: 15-Apr-2008

Standards Content (Sample)

ETSI TS 186 011-2 V1.0.0 (2008-04)
Technical Specification


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
IMS NNI Interworking Test Specifications;
Part 2: Test Descriptions for IMS NNI Interworking

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2 ETSI TS 186 011-2 V1.0.0 (2008-04)



Reference
DTS/TISPAN-06027-2-NGN
Keywords
IMS, interworking, NNI, testing
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ETSI

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3 ETSI TS 186 011-2 V1.0.0 (2008-04)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Abbreviations.7
4 IMS NNI Interoperability Test Specification.8
4.1 Introduction.8
4.2 Test prerequisites.8
4.2.1 IP version.8
4.2.2 IP bearer establishment.8
4.2.2.1 3GPP.8
4.2.3 Authentication and security .8
4.2.3.1 3GPP.8
4.2.4 Registration and subscription.9
4.2.4.1 SIP call flow.9
4.2.5 Supported options .9
4.2.5.1 Security.9
4.2.5.2 Signalling compression.10
4.2.5.3 Preconditions.10
4.2.5.4 Reliable provisional responses .10
4.2.5.5 Forking.10
4.3 Test infrastructure.10
4.3.1 Core IMS nodes .10
4.3.1.1 P-CSCF.10
4.3.1.1.1 Relevant interfaces.10
4.3.1.1.2 Node configuration.10
4.3.1.2 S-CSCF.10
4.3.1.2.1 Relevant interfaces.10
4.3.1.2.2 Node configuration.11
4.3.1.3 HSS.11
4.3.1.3.1 Relevant interfaces.11
4.3.1.3.2 Node configuration.11
4.3.2 External IMS nodes.11
4.3.2.1 UE.11
4.3.2.1.1 Relevant interfaces.11
4.3.2.1.2 Node configuration.11
4.3.2.2 AS.12
4.3.2.2.1 Relevant interfaces.12
4.3.2.2.2 Node configuration.12
4.3.3 Supporting IMS nodes .12
4.3.3.1 DNS.12
4.3.3.1.1 Relevant interfaces.12
4.3.3.1.2 Node configuration.12
4.3.4 Test configurations.12
4.4 Test descriptions.16
4.4.1 General capabilities.17
4.4.1.1 IMS CN components shall support SIP messages greater than 1 500 bytes.17
4.4.2 Initial dialog or standalone request procedures.18
4.4.2.1 Standalone request procedures.18
4.4.2.1.1 Standalone MESSAGE request procedure .18
4.4.2.1.2 Standalone MESSAGE request procedure with implicit Tel URI.20
4.4.2.1.3 Standalone MESSAGE request procedure with implicit SIP URI .21
ETSI

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4 ETSI TS 186 011-2 V1.0.0 (2008-04)
4.4.2.1.4 Standalone MESSAGE request with DNS/ENUM lookup procedures .22
4.4.2.2 Initial INVITE dialog procedures .23
4.4.2.2.1 Initial INVITE request procedure.23
4.4.2.2.2 1xx provisional response to initial INVITE request procedures.25
4.4.2.2.3 2xx final response and ACK for initial INVITE request procedures.26
4.4.2.2.4 Initial INVITE request procedure with implicit Tel URI .28
4.4.2.2.5 1xx provisional response to initial INVITE request procedures with implicit Tel URI .29
4.4.2.2.6 2xx final response to initial INVITE request procedures with implicit Tel URI.30
4.4.2.2.7 Initial INVITE request procedure with implicit SIP URI.31
4.4.2.2.8 1xx provisional response to initial INVITE request procedures with implicit SIP URI.32
4.4.2.2.9 2xx final response to initial INVITE request procedures with implicit SIP URI .33
4.4.2.2.10 Initial INVITE request with DNS/ENUM lookup procedures.34
4.4.2.3 Special case of initial INVITE dialog procedures.35
4.4.2.3.1 P-CSCF initiated session release, session establishment cancelled.35
4.4.2.3.2 P-CSCF initiated session release, session released from originating network.36
4.4.2.3.3 P-CSCF initiated session release, session released from terminating network.37
4.4.2.3.4 Initial request to non-existent user procedures .38
4.4.2.3.5 Initial request to non-registered user with no filter criterion .39
4.4.2.3.6 Initial request to non-registered user with terminating unregistered filter criterion .40
4.4.2.3.7 S-CSCF initiated session release from originating network .41
4.4.2.3.8 S-CSCF initiated session release from terminating network .43
4.4.3 Subsequent requests within dialog procedures .44
4.4.3.1 Subsequent UPDATE target refresh request procedures.44
4.4.3.2 Subsequent PRACK request procedures .47
4.4.3.3 Subsequent BYE request procedures .48
4.4.3.4 Subsequent INVITE target refresh request procedures .49
4.4.3.5 Subsequent CANCEL request procedures .52
4.5 Use cases.53
4.5.1 UC_01: User-initiated VoIP call setup and release.53
4.5.1.1 Description.53
4.5.1.2 SIP Call Flow.54
4.5.2 UC_02: User-initiated call hold and resume.55
4.5.2.1 Description.55
4.5.2.2 SIP Call Flow with UPDATE .56
4.5.2.3 SIP Call Flow with reINVITE.57
4.5.3 UC_03: S-CSCF initiated session release.58
4.5.3.1 Description.58
4.5.3.2 Call Flow.59
4.5.3.2.1 Session release from originating network.59
4.5.3.2.2 Session release from terminating network.60
4.5.4 UC_04: P-CSCF initiated session release.61
4.5.4.1 Description.61
4.5.4.2 Call flow.62
4.5.4.2.1 Session establishment cancelled.62
4.5.4.2.2 Session release from originating network.63
4.5.4.2.3 Session release from terminating network.64
4.5.5 UC_05: IMS message exchange between UEs in different networks.65
4.5.5.1 Description.65
4.5.5.2 Call flow.65
History .66

ETSI

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5 ETSI TS 186 011-2 V1.0.0 (2008-04)
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 2 of a multi-part deliverable covering the IMS NNI Interworking Test Specifications, as
identified below:
Part 1: "Test Purposes for IMS NNI Interworking";
Part 2: "Test Descriptions for IMS NNI Interworking".
ETSI

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6 ETSI TS 186 011-2 V1.0.0 (2008-04)
1 Scope
The present document specifies interoperability Test descriptions (TDs) for IMS NNI interworking for the IP
Multimedia Call Control Protocol based on Stage 3 Session Initiation Protocol (SIP) and Session Description Protocol
(SDP) standard, TS 124 229 [1]. TDs have been specified on the basis of the test purposes (TPs) and test suite structure
(TSS) presented in [2]. TP fragments presented in the present document as part of TDs are defined using the TPLan
notation (ES 202 553 [5]). TDs have been written based on the test specification framework described in TS 102 351 [3]
and the interoperability testing methodology defined in TS 102 237-1 [4], i.e. interoperability testing with a
conformance relation.
The scope of these test descriptions is not to cover all requirements specified in TS 124 229 [1]. It has been reduced to
cover only requirements which relate to basic IMS call functionality for a minimal interworking IMS CN configuration,
i.e. based on a P-CSCF, S-CSCF, I-CSCF, and HSS. Therefore, assessment of, e.g. IMS roaming, topology hiding, etc.
at the NNI are not addressed in this test purpose specification. TDs have been only specified for requirements that are
observable at the interface between two separate minimal IMS CN implementations, i.e. IMS NNI.
NOTE: Requirements which can only be observed at the interface between UE and IMS CN, i.e. home P-CSCF,
are explicitly not within the scope of the present document. The latter requirements have been dealt with
from a UE and conformance perspective in TS 134 229 [6].
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: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
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 124 229 (V6.13.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Internet Protocol (IP) multimedia call control
protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP);
Stage 3 (3GPP TS 124 229 version 6.13.0 Release 6)".
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7 ETSI TS 186 011-2 V1.0.0 (2008-04)
[2] ETSI TS 186 011-1: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IMS NNI Interworking Test Specifications; Part 1: Test
purposes for IMS NNI Interworking".
[3] ETSI TS 102 351: "Methods for Testing and Specification (MTS); Internet Protocol Testing (IPT);
IPv6 Testing: Methodology and Framework".
[4] ETSI TS 102 237-1: "Telecommunications and Internet Protocol Harmonization Over Networks
(TIPHON) Release 4; Interoperability test methods and approaches; Part 1: Generic approach to
interoperability testing".
[5] ETSI ES 202 553: "Methods for Testing and Specification (MTS); TPLan: A notation for
expressing Test purposes".
[6] ETSI TS 134 229 (V6.0.0): "Universal Mobile Telecommunications System (UMTS); Internet
Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and
Session Description Protocol (SDP); Part 2: Implementation Conformance Statement (ICS)
specification (3GPP TS 34.229-2 version 6.0.0 Release 6)".
[7] ETSI TS 123 228 (V6.15.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); IP Multimedia Subsystem (IMS); Stage 2
(3GPP TS 23.228 version 6.15.0 Release 6)".
[8] ETSI TS 133 203 (V6.10.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); 3G security; Access security for IP-based services
(3GPP TS 33.203 version 6.10.0 Release 6)".
[9] Void.
[10] Void.
[11] ETSI TS 123 060 (V6.15.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); General Packet Radio Service (GPRS); Service
description; Stage 2 (3GPP TS 23.060 version 6.15.0 Release 6)".
[12] ETSI TS 127 060 (V6.0.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Packet domain; Mobile Station (MS) supporting
Packet Switched services (3GPP TS 27.060 version 6.0.0 Release 6)".
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.
[13] ETSI TR 133 978 (V6.6.0): "Universal Mobile Telecommunications System (UMTS); Security
aspects of early IP Multimedia Subsystem (IMS) (3GPP TR 33.978 version 6.6.0 Release 6)".
[14] ETSI TR 123 981 (V6.4.0): "Universal Mobile Telecommunications System (UMTS);
Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS)
implementations (3GPP TR 23.981 version 6.4.0 Release 6)".
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
AS (IMS) Application Server
CF (Test) ConFiguration
CFW Call FloW
CN Core Network
CSCF Call Session Control Function
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8 ETSI TS 186 011-2 V1.0.0 (2008-04)
DHCP Dynamic Host Configuration Protocol
DNS Domain Name System
HSS Home Subscriber Server
I-CSCF Interrogating CSCF
IMS IP Multimedia Subsystem
IOI Inter Operator Identifier
IP Internet Protocol
NNI Network-to-Network Interface
PCO Point of Control and Observation
P-CSCF Proxy CSCF
PO POstamble
PR PReamble
PSTN Public Switched Telephone Network
RQ ReQuirement
S-CSCF Serving CSCF
SIP Session Initiation Protocol
SDP Session Description Protocol
SUT System Under Test
TISPAN Telecommunications and Internet converged Services and Protocols for Advanced Networking
TB Test Body
TD Test Description
TP Test Purpose
TPLan Test purpose Notation
TSS Test Suite Structure
UC Use Case
UE User Equipment
URI Uniform Record Identifier
VoIP Voice over Internet Protocol
XML Extensible Markup Language
4 IMS NNI Interoperability Test Specification
4.1 Introduction
The IMS NNI Interoperability Test descriptions (TDs) defined in the following clauses are derived from the Test
purposes (TPs) specified in [1].
4.2 Test prerequisites
4.2.1 IP version
These test specifications are based on the use of IPv4 for SIP message transport throughout all IMS nodes [14].
4.2.2 IP bearer establishment
4.2.2.1 3GPP
3GPP bearer establishment procedures imply the creation of a PDP context over GPRS [11] and [12].
4.2.3 Authentication and security
4.2.3.1 3GPP
The current test specification supports standard 3GPP security, namely full IMS [8], early IMS [13] and optionally
allows SIP Digest authentication without key agreement and null authentication.
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9 ETSI TS 186 011-2 V1.0.0 (2008-04)
4.2.4 Registration and subscription
4.2.4.1 SIP call flow
This clause describes the registration call flow under the authentication and security scope described in clause 4.2.2.
Depending on the security and authentication method used, the registration steps are:
1. All: The UE establishes an IP bearer as required by its specific access network.
2. All: Optional P-CSCF address discovery using the DHCP procedure.
3. All: The UE initiates IMS registration. IMS waits for the UE to send an initial REGISTER request.
4. Full IMS, SIP Digest: The IMS responds to the initial REGISTER request with a valid 401 unauthorized
response.
5. Full IMS: The IMS and UE set up a temporary set of security associations.
6. Full IMS, SIP Digest: UE sends another REGISTER request (over the security associations for Full IMS).
7. All: The IMS responds to the REGISTER request with valid 200 OK responses (sent over the same temporary
set of security associations that the UE used for sending the REGISTER request for Full IMS).
8. All: The IMS waits for the UE to send a SUBSCRIBE request (over the newly established security association
for Full IMS).
9. All: The IMS responds to the SUBSCRIBE request with a valid 200 OK response.
10. All: The IMS sends a valid NOTIFY request for the subscribed registration event package.
11. All: The IMS waits for the UE to respond to the NOTIFY with a 200 OK response.
Expected sequence:
Step Direction Message Comment
UE IMS
2  Optional P-CSCF address discovery using DHCP
procedures for IPv4.

3 REGISTER The UE sends initial registration for IMS services.
4 401 Unauthorized Full IMS, SIP Digest: The IMS responds with a valid
authentication challenge and security mechanisms
supported by the network.
5 REGISTER Full IMS, SIP Digest: The UE completes the
security negotiation procedures (sets up a
temporary set of security associations for Full IMS)
and sends another REGISTER with authentication
credentials.
6 200 OK The IMS responds with 200 OK.
7 SUBSCRIBE The UE subscribes to its registration event
package.
8 200 OK The IMS responds with 200 OK.
9 NOTIFY The IMS sends initial NOTIFY for registration event
p
...