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CCITT Recommendation E.711 Telephone network and ISDN. Quality of service, network management and traffic engineering. User demand modelling
INTERNATIONAL TELECOMMUNICATION UNION
CCITT
THE INTERNATIONAL
TELEGRAPH AND TELEPHONE
CONSULTATIVE COMMITTEE
TELEPHONE NETWORK AND ISDN
QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING
USER DEMAND MODELLING
Recommendation E.711
FOREWORD
Ilie (.’(.ITT (die International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). ('(.'ITT is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis.
The Plenary Assembly of ССТГГ which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of СС1ТГ between Plenary Assemblies is covered by the procedure laid down in CC1TT Resolution No. 2 (Melbourne, 1988).
Recommendation E.711 was revised by Study Group II and was approved under the Resolution No. 2 procedure on the 30th October 1992.
C(TIT NOTE
In this Recommendation, the expression "Administration" is used for conciseness Io indicate both a telecommunication administration and a recognized private operating agency.
© ITU 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU.
Recommendation E.711
USER DEMAND MODELLING
(revised 1992)
Introduction
ISDN users have various needs for information transfer. Hie user demand, as manifested in lhe user/CPF, interface (see figure la)/E.711], is characterized by an arrival process and by a call duration and/or a quantity of information attached to each arrival.
Through the mediation of the Customer Premises Equipments (CPEs), user demands are translated into call demands for specific telecommunication services in the user-network interface. 'These call demands are modelled in tins Recommendation to allow die characterization of die traffic offered to the layers 1 to 3 of the ISDN.
Based on die call demand modelling, users will be characterized by the generating process of their originating and terminating call demands.
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