What is ISO 22418 about?
ISO 22418 specifies the fast service announcement protocol (FSAP) for general purposes in ITS. It references and supports all features of ISO/TS 16460, especially supporting the service response message (SRM) and related features in addition to the service announcement message (SAM), which enables only very basic features.
FSAP supports locally advertised ITS services uniquely identified by an ITS application identifier (ITS-AID).
ISO 22418 specifies message formats and related basic protocol procedures by reference to ISO/TS 16460, and further related protocol requirements for operation of FSAP in the context of an ITS station specified in ISO 21217.
ISO 22418 illustrates its relations to service announcement protocols specified by ETSI TC ITS and IEEE.
Who is ISO 22418 for?
ISO 22418 on intelligent transport systems is useful for:
- Traffic regulation department
- Real-time parking management zones
- Electronic toll collection booths
- Emergency vehicle notification system manufacturer
Why should you use ISO 22418?
ISO 2241 is useful because it illustrates and specifies the features of the cooperative push mechanism "service announcement" based on the internationally harmonized message formats specified in ISO/TS 16460, and builds on any localized ITS-S communications protocol stack (ITS-SCPS), one of which is FNTP, specified in ISO 292811, which builds on the ITS-M5 access technology specified in ISO 21215. It is to be noted that the terms "service announcement" and "service advertisement" are used synonymously
ISO 2241 is preferred by the users because it complements service announcement specifications at IEEE ("WAVE Service Advertisement" [WSA] specified in IEEE 1609.3[TM]) and at ETSI ("Service Announcement Essential Message" [SAEM] specified in draft ETSI EN 302 8901):
- The WSA requires normatively only a subset of the functionality specified in ISO/TS 16460. WAVE is designed for the IEEE 802.11(TM) OCB localized communications access technology operated in the 5,9 GHz frequency bands allocated in the United States of America, also referred to as "US-DSRC".
- The SAEM, also using the message formats specified in ISO/TS 16460, is tailored in support of a limited ITS service domain identified in ETSI as "Basic Set of Applications", using only a small sub-set of functionalities specified in ISO/TS 16460 and in this document. So far, ETSI requires usage of the ITS-S communication protocol stack constituted by ITS-G5, GeoNetworking, the Basic Transport Protocol and the common ETSI message header.
What’s changed since the last update?
BS EN ISO 22418:2020 supersedes ISO 22418:2018 which has been withdrawn. BS EN ISO 22418:2020 has been editorially revised. The main changes compared to the previous edition are as follows:
- This document has been editorially aligned with draft ETSI EN 302 8901 in order to make these two standards complement each other such that both can be published as European standards
- One minor technical detail of the ASN.1 code related to a specific extension element was harmonized with ETSI