Cooperative intelligent transport systems (C-ITS)
Classification schemes for SDO deliverables
Edition 29. June 2020
Classification schemes for SDO deliverables help sorting the large number of deliverables from Standard Development Organizations (SDOs). Two schemes were developed by ESF GmbH, as port of a support acitivity for national deployment of C-ITS.
It serves as a guide for C-ITS standard developers, system designers, and for C-ITS deployment.
Categories of SDO deliverables
Standardization activities can be grouped in standardization areas. For the purpose of this document, this grouping follows largely the ITS station architecture specified in ISO 21217 and illustrated in Figure 1.
Figure 1 — Simplified ITS station architecture (ISO 21217)
The "Harmonized Architecture Reference for Technical Standards" (HARTS) project applied the same architectural approach using slightly different terms.
The following standardisation areas are identified and used in this multipart document:
High level system architecture and related issues, i.e. the environment in which ITS-SUs according to Figure 1 operate.
Primarily the general framework illustrated in Figure 1.
Issues related to use cases and related applications (procedural behaviour) and their respective communications (data and messages) that are typically architecturally located in the Applications and Facilities blocks of Figure 1.
Management of issues related to whole ITS-SU covering e.g. local station management and remote station management.
Issues architecturally mainly located in the Security block of Figure 1; these issues include interactions between the Security block and basically all other blocks of Figure 1. Note that security also includes privacy.
Communications issues architecturally located in the Access block of Figure 1, i.e. the functionality of the OSI layers 1 and 2.
Communications issues architecturally located in the Networking & Transport block of Figure 1, i.e. the functionality of the OSI layers 3 and 4.
Issues related to communications and applications, architecturally located in the Facilities block of Figure 1, i.e. the functionality of the OSI layers 5, 6, and 7.
Issues related to a combination of A-6, A-7, and A-8.
Within each standardization area, possible subjects of an SDO deliverable are distinguished by means of categories of SDO deliverables.
The following standards categories, applicable for the various standardisation areas, are identified and used in this multipart document:
The major topic is the provision of results on investigations aiming on identifying potential future standardisation activities.
The major standardization topic is the provision of functional requirements without going into the details of specifications of e.g. protocols, data, or messages.
The major standardization topic is the provision of use case specifications and related illustrations.
The major standardization topic is the provision of definitions of data, also referred to as "data dictionaries", or the specification of messages, typically based on standardized data.
The major standardization topic is the provision of protocol specifications, e.g. communications protocols and procedural behaviour of applications.
The major standardization topic is the provision of test specifications, e.g. conformance test suites. Conformance test suites typically consist of three parts, i.e.
The major topic is the provision of information on applicable regulations. Note that such information usually is not provided in standards, whilst standards (e.g. Harmonized European Norms) are referenced by regulation.
The major topic is the provision of registration information, e.g. a registry of OSI layer port numbers for a specific transport protocol, or a registry for globally unique ITS application identifiers (ITS-AID).
The major topic is the provision of tutorials on technical topics and guidelines on how to apply standards; an example is this multipart document.
The major topic is the provision of non-normative information, and are largely different to tutorials and guides, e.g. validation reports on conformance testing and security analysis (TVRA).
The major topic is the provision of results on scientific research related to potential future standardization.
The major standardization topic is the provision of process specifications, e.g. business processes.