ISO/IEC 4396-9:2023

INTERNATIONAL ISO/IEC
STANDARD 4396-9
First edition
Telecommunications and
information exchange between
systems — Recursive inter-network
architecture —
Part 9:
Error and flow control protocol
Télécommunications et échange d'information entre systèmes —
Architecture récursive inter-réseaux —
Partie 9: Protocole de contrôle d'erreurs et de flux
PROOF/ÉPREUVE
Reference number
ISO/IEC 4396-9:2023(E)
© ISO/IEC 2023

---------------------- Page: 1 ----------------------
ISO/IEC 4396-9:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
PROOF/ÉPREUVE © ISO/IEC 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 4396-9:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Overview of the EFCP .2
5 Role of EFCP within the IPC process .3
5.1 General . 3
5.2 Description of the Data Transfer Protocol (DTP) Task . 3
5.3 DTP user service API definition . 5
5.3.1 Read API or read immediate invoked . 5
5.3.2 Read/Read immediate action . 5
5.3.3 Write action . 5
5.4 Description of the DTCP task . 5
5.4.1 General . 5
5.4.2 Retransmission control . 6
5.4.3 Flow control . 6
6 Common elements of the DTP and DTCP tasks . 7
6.1 Abstract and encoding rules .
...

ISO 4396-9:2022(1)
ISO/IEC PRF 4396-9
ISO/IEC JTC 1/SC 6/WG 7
Date: 2022-09
Secretariat: KATS
Date: 2023-10-13
Telecommunications and information exchange between
systems— Future network — Recursive inter-network
architecture — —
Part 9:
Error and flow control protocol
Télécommunications et échange d'information entre systèmes — Architecture récursive inter-réseaux —
Partie 9: Protocole de contrôle d'erreurs et de flux
FDIS stage

---------------------- Page: 1 ----------------------
ISO/IEC PRF 4396-9:2023(E)
© ISO/IEC 2022, Published in Switzerland2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel.Phone: + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail: copyright@iso.org
www.iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC PRF 4396-9:2023(E)


© ISO/IEC 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/IEC PRF 4396-9:2023(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of document should be noted. This document was drafted in accordance with the editorial
rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives or
www.iec.ch/members_experts/refdocs).
Field Code Changed
Attention is drawnISO and IEC draw attention to the possibility that some of the elementsimplementation
of this document may beinvolve the subjectuse of (a) patent(s). ISO and IEC take no position concerning
the evidence, validity or applicability of any claimed patent rights. in respect thereof. As of the date of
publication of this document, ISO and IEC had received notice of (a) patent(s) which may be required to
implement this document. However, implementers are cautioned that this may not represent the latest
information, which may be obtained from the patent database available at www.iso.org/patents and
https://patents.iec.ch. ISO and IEC shall not be held responsible for identifying any or all such patent
rights. Details of any patent rights identified during the development of the document will be in the
Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC
list of patent declarations received (see https://patents.iec.ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html. In the IEC, see
www.iec.ch/understanding-standardswww.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6 Telecommunications and information exchange between systems.
A list of all parts in the ISO/IEC 4396 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-
committeeswww.iso.org/members.html and www.iec.ch/national-committees.
iv © ISO/IEC 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/IEC PRF 4396-9:2023(E)
Introduction
This document describes the Error and Flow Control Protocol (EFCP) specification. EFCP is the data
[1] [2] [3] [1] [2] [3]
transfer protocol o
...