SIST-TS TS 101 329-2 V2.1.3:2004

• Abstract:

  Define classes of Quality of Service for TIPHON compliant systems. Define classes or types of IP terminal to be used with TIPHON systems. Provide guidelines on the relationship between Terminal type, network performance and end-to-end TIPHON Quality of Service.

• Status: Published
• Publication Date: 31-Mar-2004
• ICS: 33.020 - Telecommunications in general
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2004
• Due Date: 01-Apr-2004
• Completion Date: 01-Apr-2004
• Ref Project: ETSI TS 101 329-2 V2.1.3 (2002-01) - Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 3; End-to-end Quality of Service in TIPHON systems; Part 2: Definition of speech Quality of Service (QoS) classes

SIST-TS TS 101 329-2 V2.1.3:2004 is the Slovenian adoption of the ETSI TIPHON Release 3 specification for end-to-end speech Quality of Service in IP telephony. Published by SIST, it defines speech QoS classes for TIPHON-compliant systems and relates those classes to terminal type, network performance, and end-to-end user experience. It is intended for people who design, specify, test, or assess voice-over-IP telephony networks and terminals.

What does SIST-TS TS 101 329-2 V2.1.3:2004 specify?

SIST-TS TS 101 329-2 V2.1.3:2004 specifies speech QoS classes for TIPHON-compliant IP voice telephony networks and ties them to the terminal and network conditions that shape the perceived result. Clause 1 sets the scope, clauses 4 and 5 carry the main technical content, and Annex A provides bibliography support.

Part	Content
Clause 1	Scope
Clause 2	References
Clause 3	Definitions and abbreviations
Clause 4	Definition of TIPHON Speech QoS classes
Clause 5	TIPHON speech QoS performance metrics
Annex A	Bibliography

The standard applies to the TIPHON scenarios covered by the Release 3 QoS work. It is organized so the reader can move from the class names, to the metrics used to judge them, to the references needed for measurement and interpretation.

What are the key requirements of SIST-TS TS 101 329-2 V2.1.3:2004?

SIST-TS TS 101 329-2 V2.1.3:2004 defines how TIPHON speech quality is classified and how compliance is judged. In practice, a system must fit one speech QoS class across all three performance dimensions at the same time.

• Clause 4 defines three main speech QoS classes: WIDEBAND, NARROWBAND with three levels - HIGH, MEDIUM, and ACCEPTABLE - and BEST EFFORT. This matters because the class name tells you what user experience the system is designed to deliver.
• Clause 4 treats WIDEBAND and NARROWBAND as mouth-to-ear classes, so both the network and the TIPHON terminal affect the result. That means terminal choice is part of QoS planning, not just network engineering.
• Clause 4 says WIDEBAND and NARROWBAND provide performance guarantees for 95 % of all connections. BEST EFFORT provides no speech performance guarantees. In practice, that separates managed service targets from unmanaged Internet-style service.
• Clause 5 says compliance is based on three metrics together: Overall Transmission Quality Rating (R), Listener Speech Quality, and End-to-end Delay. Passing only one of them is not enough.
• Clause 5.1 defines R as a mouth-to-ear quality rating calculated with the E-Model and using standard telephone handsets at both ends. For readers, that means quality planning should follow the standard model and handset assumption, not a custom local estimate.
• Clause 5.2 uses reference speech-quality comparisons tied to G.711, GSM-FR, GSM-EFR, and G.726 examples. These examples help compare perceived quality, but they are not a recommendation to implement those codecs.
• Clause 5.3 sets delay limits by class, with the tighter limits attached to the higher-quality classes and target values for BEST EFFORT. This is important because conversational quality depends strongly on delay, not only on codec quality.
• Clause 5 points to TS 101 329-5 for the measurement methods. If you need test evidence, that is the part to use for the actual measurement procedure.

What terms does SIST-TS TS 101 329-2 V2.1.3:2004 define?

SIST-TS TS 101 329-2 V2.1.3:2004 defines a small set of terms that frame how its QoS classes are read.

• codec - a combined speech encoder and decoder used to carry voice in digital form.
• Quality of Service (QoS) - the performance level of the service, here focused on speech transport.
• Internet Protocol (IP) - the packet-based networking technology used by TIPHON systems.
• Public Switched Telephone Network (PSTN) - the conventional telephone network used as a quality reference.
• E-Model - the calculation model used to derive the overall transmission quality rating.
• Overall Transmission Quality Rating (R) - a rating that represents full mouth-to-ear quality in a typical telephony setting.
• Listener Speech Quality - the one-way, non-interactive speech quality experienced by the listener.

Who uses SIST-TS TS 101 329-2 V2.1.3:2004?

SIST-TS TS 101 329-2 V2.1.3:2004 is used by TIPHON system designers, IP telephony network planners, terminal developers, test labs, and quality managers. It helps them choose a QoS class, relate that class to terminal and network performance, and judge whether speech service targets are being met.

Which standards are used with SIST-TS TS 101 329-2 V2.1.3:2004?

SIST-TS TS 101 329-2 V2.1.3:2004 relies on ETSI and ITU-T references for models, speech coding examples, handset assumptions, and measurement methods.

Standard	What it contributes
ETSI TS 101 329-5	Measurement methodologies for the QoS metrics
ETSI EN 300 961	GSM Full Rate speech transcoding reference
ETSI EN 300 726	GSM Enhanced Full Rate speech transcoding reference
ITU-T G.107	The E-Model used to calculate R
ITU-T G.109	Categories of speech transmission quality
ITU-T G.711	PCM voice reference for speech-quality comparison
ITU-T G.726	ADPCM speech reference for comparison
ITU-T P.310	Standard telephone handset characteristics assumed in calculations

The TIPHON series named in the foreword also includes TR 101 329-1, TS 101 329-3, TR 101 329-6, and TR 101 329-7.

What does the SIST-TS TS 101 329-2 V2.1.3:2004 document contain?

SIST-TS TS 101 329-2 V2.1.3:2004 contains the class definitions, the three performance metrics, and the references needed to interpret them. Tables 1 to 4 set the class thresholds and the quality comparisons, while Figure 1 shows how this part fits into the wider TIPHON QoS documentation. Annex A gives the bibliography, and the front matter includes the IP rights notice, foreword, and introduction.

SLOVENSKI STANDARD
01-april-2004
Harmonizacija telekomunikacij in internetnega protokola prek omrežij (TIPHON), 3.
izdaja - Kakovost storitve od konca do konca v sistemih TIPHON - 2. del: Definicija
razredov kakovosti storitve (QoS) govora
Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON)
Release 3; End-to-end Quality of Service in TIPHON systems; Part 2: Definition of
speech Quality of Service (QoS) classes
Ta slovenski standard je istoveten z: TS 101 329-2 Version 2.1.3
ICS:
33.020 Telekomunikacije na splošno Telecommunications in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Technical Specification
Telecommunications and Internet Protocol
Harmonization Over Networks (TIPHON) Release 3;
End-to-end Quality of Service in TIPHON systems;
Part 2: Definition of speech Quality of Service (QoS) classes

2 ETSI TS 101 329-2 V2.1.3 (2002-01)

Reference
RTS/TIPHON-05012b
Keywords
E-Model, internet, IP, network, quality, service,
telephony
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© European Telecommunications Standards Institute 2002.
All rights reserved.
ETSI
3 ETSI TS 101 329-2 V2.1.3 (2002-01)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .5
1 Scope.6
2 References.6
3 Definitions and abbreviations.6
3.1 Definitions.6
3.2 Abbreviations.7
4 Definition of TIPHON Speech QoS classes.7
5 TIPHON speech QoS performance metrics .7
5.1 Overall transmission quality rating .8
5.2 Listener speech quality of TIPHON systems.8
5.3 End-to-end delay.9
Annex A (informative): Bibliography.10
History .11

ETSI
4 ETSI TS 101 329-2 V2.1.3 (2002-01)
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 Project Telecommunications and Internet Protocol
Harmonization Over Networks (TIPHON).
The present document is part 2 of a multi-part deliverable covering End-to-end Quality of Service in TIPHON systems,
as identified below:
TR 101 329-1: "General aspects of Quality of Service (QoS)";
TS 101 329-2: "Definition of speech Quality of Service (QoS) classes";
TS 101 329-3: "Signalling and control of end-to-end Quality of Service (QoS)";
TS 101 329-5: "Quality of Service (QoS) measurement methodologies";
TR 101 329-6: "Actual measurements of network and terminal characteristics and performance parameters in
TIPHON networks and their influence on voice quality";
TR 101 329-7: "Design guide for elements of a TIPHON connection from an end-to-end speech transmission
performance point of view".
Quality of Service aspects of TIPHON Release 4 and 5 Systems will be covered in TS 102 024 and TS 102 025
respectively (see Bibliography), and more comprehensive versions of the Release 3 documents listed above will be
published as part of Release 4 and 5 as work progresses.
ETSI
5 ETSI TS 101 329-2 V2.1.3 (2002-01)
Introduction
The present document forms one of a series of technical specifications and technical reports produced by TIPHON
Working Group 5 addressing Quality of Service (QoS) in TIPHON Systems. The structure of this work is illustrated in
figure 1.
Introduction Definition of 5
Speech Classes
TR 101 329-1 TS 101 329-2
General Speech
QoS
Aspects
of QoS Classes
SPEC
REPORT
Generic QoS
Specific Aspects of QoS
TS 101 329-5 TR 101 329-6 TR 101 329-7
TS 101 329-3
QoS Measure- Actual Design
Control ment Test Guidelines
Methods Results
SPEC REPORT REPORT
SPEC
QoS signalling Measurement Repository of Useful info for
requirements methodologies real test results designers

Figure 1: Structure of TIPHON QoS Documentation for Release 3
ETSI
6 ETSI TS 101 329-2 V2.1.3 (2002-01)
1 Scope
The present document defines five classes of Quality of Service for characterizing the speech performance of TIPHON
compliant IP voice telephony networks.
The classes of service apply to all the defined TIPHON Scenarios and are specified in terms of the following
parameters:
- "Overall transmission quality rating";
- "Listener speech quality" (one-way non-interactive speech quality); and
- "End-to-end delay".
2 References
The
...