1、PD ISO/TS 16460:2016Intelligent transport systems Communications accessfor land mobiles (CALM) Communication protocolmessages for global usageBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD ISO/TS 16460:2016 PUBLISHED DOCUMENTNational forewordThis Published Docume
2、nt is the UK implementation of ISO/TS16460:2016.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/278, Intelligent transport systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to inc
3、lude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 94465 9ICS 03.220.01; 35.240.60Compliance with a British Standard cannot confer immunity fromlegal obligation
4、s.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 August 2016.Amendments issued since publicationDate Text affectedPD ISO/TS 16460:2016 ISO 2016Intelligent transport systems Communications access for land mobiles (CALM) Communication prot
5、ocol messages for global usageSystmes intelligents de transport Accs aux communications des services mobiles terrestres (CALM) Messages de protocole de communication pour une utilisation globaleTECHNICAL SPECIFICATIONISO/TS16460Reference numberISO/TS 16460:2016(E)First edition2016-09-01PD ISO/TS 164
6、60:2016ISO/TS 16460:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, includi
7、ng 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 ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +4
8、1 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgPD ISO/TS 16460:2016ISO/TS 16460:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Abbreviated terms 25 Localized communications messages . 25.1 Purpose 25.2 Localized message protocol . 35.3 M
9、essage formats 35.4 Networking features. 45.4.1 Subtype values . 45.4.2 Networking feature 0 . 55.4.3 Networking feature 1 . 55.4.4 Networking feature 2 . 65.4.5 N-Extensions . 75.4.6 TPID values . 75.5 Transport features . 85.5.1 Transport feature 0 85.5.2 Transport feature 1 95.5.3 Transport featu
10、re 2 .105.5.4 T-Extensions115.5.5 ITS port numbers .115.6 Procedures . 116 Service advertisement messages 116.1 Purpose . 116.2 Unique identifiers 126.2.1 ITS-AID/PSID .126.2.2 ITS-PN 126.3 Service advertisement protocol 136.4 Service advertisement message 136.4.1 Messages 136.4.2 Message structure
11、136.4.3 Message header .146.4.4 Message body . 166.5 Service response message 216.5.1 Message structure 216.5.2 Message header .226.5.3 Message body . 226.6 Count N . 266.7 Procedures . 266.7.1 General. 266.7.2 Privately allocated channels . 266.8 Secured messages 277 Structure of extension elements
12、 .28Annex A (normative) ASN.1 modules 30Bibliography .43 ISO 2016 All rights reserved iiiContents PagePD ISO/TS 16460:2016ISO/TS 16460:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepa
13、ring 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 l
14、iaison 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 D
15、irectives, 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
16、 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 dec
17、larations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information
18、about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 204, Intelligent transport systems.iv ISO 2016 All rights reservedPD ISO/TS 16460:
19、2016ISO/TS 16460:2016(E)IntroductionThis document is a member of the set of International Standards for communications access for land mobiles (CALM). An introduction to this set of International Standards is provided in ISO 21217.2Localized communications, i.e. communications without networking thr
20、ough a cloud, and service advertisement are essential protocol functionalities in Cooperative Intelligent Transport Systems (C-ITS). ISO and IEEE developed protocols with similar functionality, i.e. the ISO Fast Networking the Service Advertisement Message (SAM): an APDU to be transported in for exa
21、mple, an LM; the Service Response Message (SRM): an APDU acknowledging a SAM that offered a service based on an ITS application class8to be transported in for example, an LM; the related basic requirements for procedures.Specifications are partly done by normative references to IEEE 1609.3TM-2016.NO
22、TE These message format specifications and basic procedures need to be complemented by complete procedures and SAP specifications according to the context of usage, i.e. an ITS station specified in ISO 21217,2or a WAVE device specified in IEEE 1609.0TM11or any other context.2 Normative referencesThe
23、 following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.I
24、SO/IEC 8824-1, Information technology Abstract Syntax Notation One (ASN.1): Specification of basic notationISO/IEC 8825-2, Information technology ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)IEEE 1609.3TM-2016, Standard for Wireless Access in Vehicular Environments (WAVE) Networ
25、king Services3 Terms and definitionsNo terms and definitions are defined in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/w
26、ww.iso.org/obpTECHNICAL SPECIFICATION ISO/TS 16460:2016(E) ISO 2016 All rights reserved 1PD ISO/TS 16460:2016ISO/TS 16460:2016(E)4 Abbreviated termsCIP communication interface parameterC-ITS cooperative ITSFNTP fast networking 2 ISO 2016 All rights reservedPD ISO/TS 16460:2016ISO/TS 16460:2016(E) de
27、dicated forwarding performed at higher layers, e.g. at the ITS-S facilities layer of an ITS station2; this is a feature useful for geo-dissemination of information;which creates so-called “Vehicular Ad hoc NETworks” (VANETs). Routing of packets through a network in ITS will use the Internet protocol
28、 version 6 (IPv6).5.2 Localized message protocolAs this document does not specify a specific localized communications protocol but just the structure of messages of such protocols and related basic requirements, a hypothetical localized communications protocol with the name “Localized Message Protoc
29、ol” is used to simplify reading of the document.5.3 Message formatsFigure 1 illustrates the basic format of the Localized Message (LM). Unaligned packet encoding rules (UPER) applied to the ASN.1 type LMnpdu defined in A.2.1 results in the intended binary presentation of this LM format.Figure 1 Gene
30、ral format of the LM NPDUNOTE 1 In Figure 1, the “TPID” field (specified in IEEE 1609.3TM-2016 as a one-octet unsigned integer field completely allocated in the WSMP-N-Header) is split into a “Feature selector” field of the “N-Header” and a “T-Extensions flag” field of the “T-Header” (according to t
31、he general rules of the OSI model). However, the two presentations result in identical binary presentations.The LM consists of three parts: “N-Header” a 4-bit unsigned integer “Subtype” number in the range of 0 to 15 indicating a networking related feature; a 1-bit “N-Extensions flag”; a 3-bit unsig
32、ned integer “Version” number in the range of 0 to 7 indicating the version of the localized message protocol. In case a receiver does not support the version, the received packet cannot be processed. The first version number used is three as specified in IEEE 1609.3TM-2016;NOTE 2 The format presente
33、d in Figure 1 is such that WAVE devices implementing version 2 of WSMP13can identify LMs as WSMP messages with version number 3 or higher. a networking related feature specified in 5.4 and selected by the value contained in the field “Subtype”; “N-Extensions” being present if the “N-Extensions flag”
34、 is set to 1b; a 7-bit unsigned integer in the range of 0 to 127, the “Transport Protocol Identifier (TPID) feature selector”, indicating content in the “T-Header”. “T-Header ” a 1-bit “TPID - T-Extensions flag”; ISO 2016 All rights reserved 3PD ISO/TS 16460:2016ISO/TS 16460:2016(E) a transport rela
35、ted feature specified in 5.5 and selected by the TPID feature selector value contained in the “N-Header”; “T-Extensions” being present if the “T-Extension flag” is set to 1b; a one or two octet field indicating the number of octets contained in “User data”. Body the “User data”.The distinction of “N
36、-Header” (networking related features) and “T-Header” (transport related features) is in support of the ITS-S networking and transport layer that combines OSI layers 3 and 4 as illustrated in ISO 21217.2The field “Length of User data” has a length of one or two octets dependent on the value containe
37、d in it: one octet size: Values from 0 to 127. The most significant bit is always set to zero. Presented as 0x00 (=0) to 0xEF (=127); i.e. the remaining 7 bits contain an unsigned integer number. two octet size: Values from 128 to 16383. The most significant bit of the first octet is always set to o
38、ne and the second most significant bit of the first octet is always set to zero. Presented as 0x8080 (=128) to 0xBFFF (=16383); i.e. the remaining 14 bits contain an unsigned integer number.NOTE 3 This presentation results from the unaligned packed encoding rules applied to ASN.1 types of unconstrai
39、nt variable length.5.4 Networking features5.4.1 Subtype valuesNetworking features are identified by a subtype value. Subtype values are presented in Table 1.Table 1 Subtype valuesSubtypeN-Extensions flagN-ExtensionsNetworking related featuresRemark0 0b Not present Null-Networking Mandatory feature s
40、pecified in IEEE 1609.3TM-2016. Format described in 5.4.2.1b Present1 0b Not present ITS station-internal forwardingFormat specified in 5.4.3.1b Present2 0b Not present N-hop forwarding Format specified in 5.4.4.1b Present3 0b Not present Geo-forwarding Reserved. Not specified in this document.1b Pr
41、esent47 0b Not present Reserved for ISO Allows for further four networking features.1b Present815 0b Not present Reserved for IEEE Allows for further eight networking features.1b PresentN-Extensions and related basic procedures shall be as specified in 5.4.5.New networking features can be specified
42、and linked to so far reserved subtype values at a later stage without breaking backward compatibility.NOTE Updates of N-Extensions will be published in the ISO/TS 16460 folder of the ISO standards maintenance portal at http:/standards.iso.org/iso/ts/16460.4 ISO 2016 All rights reservedPD ISO/TS 1646
43、0:2016ISO/TS 16460:2016(E)5.4.2 Networking feature 0Subtype 0 selects the “Null-Networking” feature introduced in 5.4.1.NOTE Procedures on how to use this feature in the context of an ITS station unit, or a WAVE device or any other context are outside the scope of this document.The “Null-Networking”
44、 feature with Subtype 0 is the uppermost simple feature, as it requires only processing of the TPID feature selector field specified in 5.6. Figure 2 presents the N-Header format for Subtype 0 with N-Extensions being absent.Figure 2 N-Header for Subtype 0 without N-ExtensionsFigure 3 presents the N-
45、Header format for Subtype 0 with N-Extensions being present.Figure 3 N-Header for Subtype 0 with N-ExtensionsN-Extensions and related basic procedures shall be as specified in 5.4.5.5.4.3 Networking feature 1Subtype 1 selects the “ITS Station-Internal Forwarding” feature introduced in 5.4.1.NOTE Pro
46、cedures on how to use this feature in the context of an ITS station unit, or a WAVE device, or any other context are outside the scope of this document.ITS station-internal forwarding is a feature applicable in ITS stations compliant with ISO 212183(Link-ID) and ISO 24102-14(ITS-SCU-ID). It is used
47、to forward packets between router units and host units that are part of the same station/device. The field “Direction” contains an unsigned integer number with the two possible values “0” (“from host to router”) and “255” (“from router to host”). The field “Counter” contains a one octet unsigned int
48、eger cyclic packet counter being unique in the unit that forwards a packet. Figure 4 presents the N-Header format for Subtype 1 with N-Extensions being absent.Figure 4 N-Header for Subtype 1 without N-ExtensionsFigure 5 presents the N-Header format for Subtype 1 with N-Extensions being present. ISO
49、2016 All rights reserved 5PD ISO/TS 16460:2016ISO/TS 16460:2016(E)Figure 5 N-Header for Subtype 1 with N-ExtensionsN-Extensions and related basic procedures shall be as specified in 5.4.5.5.4.4 Networking feature 2Subtype 2 select the “N-hop Forwarding” feature introduced in 5.4.1.NOTE Procedures on how to use this feature in the context of an ITS station unit, or a WAVE device, or any other context are outside the scope of this document.N-hop forwardin
