Overview
ISO/TR 17427-4:2015 - "Intelligent transport systems - Cooperative ITS - Part 4: Minimum system requirements and behaviour for core systems" is an informative ISO Technical Report that identifies potential minimum system requirements and behaviour for C-ITS core systems. It raises awareness of critical issues that cooperative intelligent transport systems (C-ITS) may introduce, suggests strategies to identify, control or mitigate those issues, and points to existing standards where specifications are available. It does not prescribe solution specifications.
Key Topics
This Technical Report organizes practical guidance around core system subsystems and requirements, including:
- Core2Core subsystem - interactions between central/core systems.
- Data distribution subsystem - catalogs, publishers, geo-casts and data provision requests.
- Misbehaviour management - detection, mitigation and handling of bad actors.
- Network services subsystem - networking protocols, IP/internet-based communications and internal interfaces.
- System service monitor - monitoring, state/mode/status and system performance.
- Time synchronization - ensuring consistent timestamps across C-ITS elements.
- User permissions & user trust management - authorization, anonymous certificates and privacy considerations.
- Operational resilience topics - physical security, environmental requirements, backup power, maintainability and constraints.
- Special areas - 5.9 GHz security credential aspects and references to internet-based communication standards.
Practical Applications
ISO/TR 17427-4:2015 is used to inform the design, procurement and operation of Cooperative ITS core systems by providing:
- Risk-awareness: identifies critical issues and system behaviours to consider during design and deployment.
- Design guidance: highlights minimum functional areas (e.g., data distribution, misbehaviour handling, time sync) to include in system architectures.
- Operational planning: informs monitoring, maintainability, backup power and security considerations for operational centres.
- Standards alignment: points practitioners to related ISO, CEN, ETSI, IEEE and SAE deliverables for detailed protocol and interface specifications.
Who Should Use This Standard
- ITS system architects and integrators
- Road authorities and transport operators
- C-ITS service providers and back-office operators
- Software and hardware vendors for vehicle/infrastructure systems
- Regulators and compliance teams assessing C-ITS readiness
Related Standards
ISO/TR 17427-4:2015 is intended to be used alongside other parts of ISO 17427 (e.g., Part 2, Part 3), ISO 21217 and applicable communications standards from IEEE, ETSI, CEN and SAE for detailed interface and protocol specifications.
Keywords: ISO/TR 17427-4:2015, Cooperative ITS, C-ITS, core systems, minimum system requirements, data distribution, misbehaviour management, time synchronization, ITS standards.