INTERNATIONAL ISO/IEC STANDARD 14908-1 First edition 2012-11-01 Information technology Control network protocol - Part 1: Protocol stack Technologies de I'information - Protocole de reseau de controle Partie 1: Pile de protocole Reference number ISO/IEC 14908-1:2012(E) IEC ISo @ISO/IEC2012 IHS under lic Not for Resale ISO/IEC 14908-1:2012(E) COPYRIGHTPROTECTEDDOCUMENT ?ISO/IEC2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, Iso's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO/IEC2012—All rightsreserved nited without license from IHS Not for Resale 14908-1 @ ISO/IEC:2012 (E) Contents page Foreword. Introduction 1 Scope.. .9 2 Normative references.... ..9 3 Terms and definitions. 4 Symbols and abbreviations... 4.1 Symbols and graphical representations. 4.2 Abbreviations... 5 Overview of protocol layering... 6 MAC sublayer.. ..15 6.1 Service provided. .15 6.2 Interface to the link layer. .15 6.3 Interface to the physical layer.... 6.4 MPDU format... .17 6.5 Predictive p-persistent CSMA -overview description 17 6.6 Idlechanneldetection.. .18 6.7 Randomising.... 6.8 Backlog estimation... .19 6.9 Optional priority.... .20 6.10 6.11 Beta1, Beta2 and Preamble Timings 21 7 Link layer. 23 7.1 Assumptions. 23 7.2 Service provided. ..24 7.3 7.4 Transmit algorithm.. .25 8 Network layer.. ..26 8.1 Assumptions. .26 8.2 Service provided. ..27 8.3 Service interface.. 27 8.4 Internal structuring of the network layer . .28 8.5 NPDU format . .28 8.6 8.7 Routers. .29 8.8 Routing algorithm.. 30 8.9 Learning algorithm subnets .30 9 .30 9.1 Assumptions.... 9.2 Service provided.. .31 9.3 Service interface.. 31 9.4 State variables . 9.5 Transaction control algorithm, 10 Transport layer .32 10.1 Assumptions. .32 10.2 Service provided. .32 10.3 Service interface.... 10.4 TPDU types and formats. .33 Copyright International Organization for Standardization nse from IHS Not for Resale 14908-1 @ISO/IEC:2012 (E) - 2 - 10.5 Protocol diagram.. .35 10.6 Transport protocol state variables . 10.7 10.8 Receive algorithm.... ..36 10.9 Receive transaction record pool size and configuration engineering.. .36 10.9.1 Genera........ 10.9.2 Number of retries.... 10.9.3 Transport layer timers.. .37 11 Session layer ..38 11.1 Assumptions. .38 11.2 ServiceProvided 11.3 Service interface.. ..39 11.4 Internal structure of the session layer... .40 11.5 SPDU types and formats .... ..41 11.6 Protocol timing diagrams.... 11.7 Request-response state variables. .44 11.8 Request-response protocol 一 clientpart.. .45 11.9 Request-response protocol server part ........ 11.10 Request-response protocol timers... .45 11.11 Authentication protocol.. .46 11.12 Encryption algorithm. .46 11.13 Retries and the role of the checksum function............. 11.14 Random Number Generation .. ..47 11.15 Using Authentication ......... 47 12 Presentation/application layer.... 12.1 Assumptions.... ..47 12.2 Service provided... 12.3 Service interface.... .48 12.4 APDU types and formats .... .49 12.5 Protocoi diagrams..... 12.6 Application protocol state variables .. .51 12.7 Request - response messaging in offline state..... .51 12.8 ..52 12.8.1 12.8.2 Network variable processing .52 12.9 Error notification to the application program.. .53 12.9.1 12.9.2 Error notification for messages ..53 12.9.3 Error notification for network variables.... 13 Network management & diagnostics 53 13.1 Assumptions.. .53 13.2 Services provided.... 13.3 Network management and diagnostics application structure. .54 13.4 Node states .... .54 13.5 Using the network management services..... 13.5.1 13.5.2 Addressing considerations.. .55 13.5.3 Making network configuration changes.. .56 13.5.4 Downloading an Application Program...... 13.5.5 Error handling conditions (infor