ISO INTERNATIONAL STANDARD 14827-2 Secondedition 2022-12 Intelligent transport systems Data interfaces between centres for transport information and control systems - Part 2: AP-DATEX Reference number IS0 14827-2:2022(E) ISO IS02022 IS0 14827-2:2022(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved IS0 14827-2:2022(E) Contents Page Foreword ..V Introduction vi 1 Scope. .1 2 Normativereferences ..1 3 Terms and definitions .1 4 Symbols and abbreviated terms 5 Conformance .3 6 Exchange framework .3 6.1 General .3 6.2 Basic pull with TCP/UDP datagrams exchange PSM 5 6.2.1 Overview 5 6.2.2 Exchange pattern messages definition 6 6.2.3 State diagrams 7 Features implementation description. .7 6.2.4 6.3 Basic push TCP/UDP datagrams exchange PSM .8 6.3.1 Overview .8 6.3.2 Exchange pattern messages definition .9 6.3.3 State diagrams. .9 6.3.4 Features implementation description 10 7 Data exchange procedures 11 7.1 General 11 7.2 General datagrams procedures 11 7.2.1 General 11 7.2.2 Sessions 11 7.2.3 Transport requirements 12 7.2.4 Response time-outs 12 7.2.5 Retransmission 12 7.2.6 Duplicate datagrams. 12 7.3 General file procedures. 12 7.4 Sessions. 12 7.4.1 General 12 7.4.2 Establishing a session. 13 7.4.3 Maintaining a session. 14 7.4.4 Terminating a session 15 7.5 Requesting information 16 7.5.1 General 16 7.5.2 Offline subscriptions 16 7.5.3 Online subscriptions. 16 7.6 Publication of information. 17 7.6.1 General. 17 7.6.2 General procedures. 17 7.6.3 Single subscriptions 19 7.6.4 Registered subscriptions 19 Annex A (normative) Message definition requirements 21 Annex B (normative) Datagram structures .25 Annex C (normative) Data dictionary .33 Annex D (normative) Value domains. .64 Annex E (normative) TCP/UDP datagrams exchange implementation considerations .77 Annex F (normative) TCP/UDP datagrams exchange over internet protocols .78 @ IS0 2022 - All rights reserved ii IS0 14827-2:2022(E) Annex G (normative) Protocol requirements list .79 Bibliography. .83 iv @ IS0 2022 - All rights reserved IS0 14827-2:2022(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 IsO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO 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). Any trade name used in this document