ISO 17423:2025

Overview

ISO 17423:2025 - Intelligent transport systems - Application requirements and objectives - defines how ITS applications present their communication needs so an ITS station (ITS‑S) can automatically select appropriate communication profiles inside an ITS station unit (ITS‑SU). The standard specifies the communication service parameters (CSPs) that application processes expose to ITS‑S management, high‑level procedures for static and dynamic ITS‑S communication profile selection, and an illustration of objectives used to estimate an optimal ITS‑S communication profile.

Keywords: ISO 17423:2025, intelligent transport systems, ITS, ITS‑S, ITS‑SU, communication service parameters, ITS‑S communication profile selection, CSPs, flow types

Key topics and technical requirements

• Communication Service Parameters (CSPs): Defines classes and individual CSPs that applications present, including operational, destination, performance, security and protocol parameters. Examples (as specified) include:
  • Operational CSPs: logical channel, session continuity, ADU generation rate, flow type, priority, expected flow lifetime, port number.
  • Destination CSPs: destination type/domain, communication distance, directivity.
  • Performance CSPs: resilience, minimum throughput, maximum latency, maximum ADU size.
  • Security CSPs: confidentiality, integrity, non‑repudiation, authentication needs.
  • Protocol CSPs: communication protocol stack and specific protocol requirements.
• Profile selection procedures: High‑level procedures for both static and dynamic ITS‑S communication profile selection, including presentation of CSPs to ITS‑S management, monitoring station communication capabilities, and monitoring applicable regulations and policies.
• Policies and regulations: Treatment of cost policies, anonymity and location privacy needs, and support for station authentication when making profile selection decisions.
• Support material: ASN.1 modules (normative) and informative annexes with example CSP presentations and communication objectives to aid implementation.

Practical applications and who uses this standard

ISO 17423:2025 is intended for stakeholders implementing or operating ITS station software and hardware that must dynamically select communications stacks based on application needs and operational constraints. Typical users:

• ITS system architects and designers implementing ITS‑S management functions
• ITS device and ITS‑SU manufacturers integrating automatic communication profile selection
• Software developers of ITS application processes and flow management components
• Traffic authorities, fleet operators and service providers specifying policy and regulatory rules
• Test laboratories and compliance teams verifying CSP presentation and profile selection behaviour

Practical benefits include improved separation of application logic from communications, automated selection of appropriate protocol stacks for differing flows, and consistent treatment of QoS, security and privacy requirements.

Related standards and references

• ISO 21217 (ITS station and communication architecture)
• ISO 24102‑6 (flow and path management procedures)
• ISO 17419 (registered flow types)
• ISO 18750 (Local Dynamic Map - LDM)

ISO 17423:2025 provides the CSP and decision‑making foundation needed to implement robust, policy‑aware communication profile selection across ITS deployments.