ISO/IEC INTERNATIONAL STANDARD 13252 First edition 1999-07-01 Information technology Enhanced communications transport service definition Technologies del'informationDéfinition du service de transport de communicationsamelioré Reference number ISO/IEC 13252:1999(E) E( 0 @ISO/EC 1999 THS under Not for Resale ISO/IEC13252:1999(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISo Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by isO member bodies. In the unlikely event ISO/IEC1999 All rights reserved. Unless otherwise specified, 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ISO/IEC1999-All rightsreserved itted without license from IHS Not for Resale ISO/IEC 13252 : 1999 (E) Contents Page 1 Scope. 1 2 Normative references.. 1 2.1 Identical Recommendations I International Standards... 1 3 Definitions .... 2 3.1 Reference Model definitions .. 2 3.2 Service definition conventions .... 2 3.3 Quality.of-Service Framework definitions.......... 2 3.4 Enhanced Communications Transport Service definitions... 2 4 Abbreviations 3 5 Conventions.. 4 5.1 General conventions 4 5.2 Parameters. 4 5.3 Notations .... 4 6 Overview and general characteristics . 4 7 Features of the Enhanced Communications Transport Service ... 5 8 Model of the Enhanced Communications Transport Service 5 8.1 Types of Transport Connection ... 5 8.2 Model of Transport Connection .. 6 9 Transport Connection characteristics .... 6 9.1 Active group integrity ..... 6 9.1.1 AGI policy... 9.1.2 Population.. 9.1.3 TC type.. 9.1.4 Transmit diversity... 9.1.5 Receive diversity .... 7 9.1.6 Transmit concurrency.... 7 9.2 Quality of service ... 7 10 Quality of service for Transport Connections 8 10.1 QoS classification..... 8 10.1.1 TC performance. 8 10.1.2 TC reliability 9 10.1.3 10 10.1.4 Miscellaneous.. 11 10.2 Levels of QoS agreement ... 11 10.2.1 Best effort level... 11 10.2.2 Guaranteed level. 11 10.3 QoS negotiation mechanisms .. 11 10.3.1 Generic QoS negotiation 11 10.3.2 OA QoS negotiation. 12 10.3.3 SWA QoS negotiation.. 14 10.3.4 Considerations ... 14 15 11 Enhanced Communications Transport Service primitives and parameters. 16 11.1 Definitions.... 16 11.2 Sequence of primitives at a TSAP..... 16 ii se from IHS Not for Resale