29/04/2003 1

Normalisation et réglementation : les 2 piliers de la QoS

Les utilisateurs y trouvent-ils leur compte ?

P-Y HébertAfutt

29/04/2003 2

Cadre réglementaire des Télécomms

Directive 2002/21/EC - 7 Mars 2002– (Framework Directive)

Directive 2002/20/EC - 7 Mars 2002– (Authorisation Directive)

Directive 2002/19/EC - 7 Mars 2002– (Access Directive)

Directive 2002/22/EC - 7 Mars 2002– (Universal Service Directive)

Directive 2002/58/EC - 31 Juillet 2002 – (Directive on privacy and electronic communications)

29/04/2003 3

Cadre réglementaire et Standards (1)

Directive 2002/21/EC - 7 Mars 2002common regulatory framework for electronic communications

networks and services (Framework Directive) – List of standards and/or specifications for electronic communications

networks, services and associated facilities and services - 5/7/2002

– Partie A – Standards obligatoires » CH. I : LS (cf. Annexe II of the Directive 92/44/EEC as amended

by Directive 97/51/EC and in future by Directive 2002/22/EC)» CH. II : Paramètres de QoS (cf. Annexe III of the Directive

98/10/EEC 4 as amended by Commission Decision 2001/22/EC 5, and in future by Directive 2002/22/EC (Universal Service Directive)

29/04/2003 4

Cadre réglementaire et Standards (2)

Directive 2002/21/EC - 7 Mars 2002Partie B - Standards volontaires

» CH. III : LS (Annexe III of the Directive 92/44/EEC as amended by Directive 97/51/EC and in future by Directive 2002/22/EC)

» CH. IV : Accès, interconnexion, portabilité n°, sélection opérateur

» CH. V: Dégroupage» CH.VI : Standards for implementing various user services.» CH. VII : Standards for implementing data protection

requirements.» CH. VIII : DVB

29/04/2003 5

Standards réglementaires et QoS

Standards QoS de la Directive 2002/21/EC Partie A – Standards obligatoires– CH. II : Paramètres de QoS

Paramètres de QoS; définitions et méthodes de mesures :

» ETSI EG 201 769

29/04/2003 6

Normes QoS dans les TC de l'ETSI

EG TR/ETR TS EN

STQ 4+2mp+4d 3+3d 4+5d

3GPP 3 3

SPAN 2 1

TIPHON 7 parties 9 parties

User Group 3 parties

AT 1

PLT 1

29/04/2003 7

Qualité de Service selon IUT

Collective effect of service performance which determines the degree of satisfaction of a user of the service (ITU-T Recommendations E.800, I.350)

STQ : 1TR-3EG (dont EG 201 769) SPAN/NA : 1TR-1ETR- 1ETS SMG/3GPP : 1ETR-2TS-2TR-1EN USER GROUP : 1EG

29/04/2003 8

Qualité de Service selon ETSI (1)

Quality specification of a telecommunications channel, system, virtual channel, computer-telecommunications session, etc. Quality of service may be measured, for example, in terms of signal-to-noise ratio, bit error rate, message throughput rate or call blocking probability

3GPP : 1TS TIPHON : 1TS-1TR SEC : 1EG-1TR TETRA : 1EG-1TS NA : 1ETR

29/04/2003 9

Qualité de Service selon ETSI (2)

Quality of Service may be applicable for the GPRS backbone if the path media supports it. Separate paths with different priorities may be defined between a GSN pair. However, the possible use of QoS in the GGSN is outside the scope of the GTP specification

3GPP : 1EN-2TS

29/04/2003 10

Qualité de Service selon ETSI (3)

a combination of traffic performance, availability, service integrity, service support and service operability

ERM : 1ETS

29/04/2003 11

Qualité de Service selon ETSI (4)

QoS requirements by the user/customer is the statement of the level of quality of a particular service required or preferred by the user/customer. The level of quality may be expressed by the user/customer in technical or non-technical language. A typical user/customer is not concerned with how a particular service is provided, or with any of the aspects of the network's internal design, but only with the resulting end-to-end service quality. From the user's/customer's point of view, QoS is expressed by parameters that:

– focus on user/customer-perceivable effects, rather than their causes within the network;– do not depend in their definition on assumptions about the internal design of the network;– take into account all aspects of the service from the user's/customer's point of view;– may be assured to a user/customer by the service provider(s);– are described in network independent terms and create a common language

understandable by both the user/customer and the service provider.

NA/SPAN : ETR 003 (1994) - ETR 044

29/04/2003 12

Voice Quality of Service (STQ)

Measure of the end to end quality of speech transmission of a connection. Strictly speaking it should be a statistical value representing the aggregate performance of a number of connections, but within the present document it is often used in relation to the performance of a single connection. The voice quality literally applies to an end to end connection including the terminals i.e. from mouth to ear, but since the terminals are often no longer the responsibility of the network operators, the term VQoS is often used to refer to the performance of a connection from NTP to NTP

29/04/2003 13

Best effort QoS & Quality of Service Classes

The best effort QoS refers to the lowest of all QoS traffic classes. If the guaranteed QoS cannot be delivered, the bearer network delivers the QoS which can also be called best effort QoS.

MESA : 1TR 3GPP : 1TS

29/04/2003 14

Et la QoS vue par les utilisateurs ?

Parmi toutes les normes citées seules– ETR 003 de NA/SPAN– EG 202 009-1,2 & 3 du User Group

prennent en compte autre chose que la seule qualité technique :– QoS attendue par l'utilisateur– QoS offerte par le fournisseur de service– QoS réalisée par le fournisseur de service – QoS perçue par l'utilisateur– Performance des réseaux– Performance du service

29/04/2003 15

LE GUIDE ETSI EG 202 009

Partie 1: Méthodologie d'identification des critères pertinents pour les utilisateurs

Partie 2: Exemples de critères pertinents pour chaque service

Partie 3: Modèle de contrat de service

29/04/2003 16

LE GUIDE ETSI EG 202 009 Partie1Identification des critères de QoS

L'enveloppe du service La méthodologie d'analyse des besoins Les mesures

– Objectives» Intrusives» Non intrusives

– Subjectives– Qui les fait ?

29/04/2003 17

LE GUIDE ETSI EG 202 009 Partie 2 Exemples de critères pertinents par service

Communications Vocales (fixes & mobiles) Accès à Internet

– Établissement de la connexion– Connectivité montante– Connectivité descendante

Communications client-serveur Disponibilité Support client sur incident Autres aspects du service

mise à disposition, facturation, annuaires, etc

29/04/2003 18

LE GUIDE ETSI EG 202 009 Partie 3Modèle de contrat de service

Les services couverts Les engagements de QoS Le support client Les rapports de QoS La facturation Les procédures de révision du contrat

29/04/2003 19

Les projets à court terme

STQ– User related QoS for mobile– QoS parameter definitions and measurements for

Internet Access QOSTIC

– Approfondissement des critères de QoS sur :» Voix» Accès Internet» Réseaux privés

USER GROUP– Révision du guide ETSI EG 202 009

29/04/2003 20

Les projets à long terme

Faire introduire dans les directives européennes des critères de QoS pertinents pour les utilisateurs

29/04/2003 21

A F U T T

Association Française des Utilisateursde Télécommunications

Visitez notre site : www.afutt.org

MERCI DE VOTRE ATTENTION