ISO 24102-4:2018

Overview

ISO 24102-4:2018 - "Intelligent transport systems - ITS station management - Part 4: Station‑internal management communications" defines secure, station‑internal management communications for ITS stations. It specifies the reference architecture, protocol data units (PDUs), communication and management procedures, security considerations, conformance and test methods for ITS‑S internal management communications (IIC). Part 4 is one element of the ISO 24102 series and is architecturally aligned with ISO 21217 (ITS station/CALM architecture).

Keywords: ISO 24102-4, ITS station management, station-internal management communications, IIC, IICM, IICA, ITS-SCU-ID, ASN.1, PDUs, ITS security.

Key technical topics and requirements

• Reference architecture (Clause 6): Defines IIC roles - IIC Manager (IICM) and IIC Agent (IICA) - and how they interact via ITS station internal networks and management SAPs (MI‑SAP, MN‑SAP, MF‑SAP, MA‑SAP, MS‑SAP).
• Protocol Data Units (Clause 7): Two ASN.1 PDUs are specified: IIC‑Request and IIC‑Response. PDUs carry fields such as source/destination ITS‑SCU‑ID, PduCounter, IIC‑PDU‑ID, data identifiers and error status.
• Communication procedures (Clause 8): Procedures for initialization, transmission and reception of IIC PDUs, including request/response behavior and processing at IICA/IICM endpoints.
• Management procedures (Clause 9): Includes ITS‑SCU‑ID assignment, maintenance and shut‑down procedures for ITS‑SCUs within the ITS station.
• Security (Clause 10): Requires secure IIC following trusted distributed systems principles; security mechanisms and parameters are defined for protected station‑internal management.
• Conformance & testing (Clauses 11–12): Specifies conformance declaration requirements and test methods; annexes include an ASN.1 module (Annex A), PDU definitions (Annex B) and an ICS proforma (Annex C).

Practical applications and who uses this standard

ISO 24102-4 is intended for:

• ITS equipment vendors implementing ITS‑station management stacks and internal management protocols.
• System integrators ensuring interoperable, secure management across ITS‑SCUs in roadside units (RSUs), onboard units (OBUs) and central ITS stations.
• Software developers encoding/decoding IIC PDUs (ASN.1/PER) and implementing IICM/IICA roles.
• Test houses and certification labs validating conformance and security of station‑internal management communications.
• Standards and regulatory bodies harmonizing ITS deployment and secure management practices.

Related standards

• ISO 21217 (CALM architecture)
• ISO 24102-1, -3, -6 (other ITS station management parts)
• ISO 17419 (globally unique ITS‑SCUID)
• ISO/IEC 8825-2 (ASN.1 PER encoding)
• ETSI TS 102 797 series (test specifications)

Adopting ISO 24102-4 helps ensure interoperable, secure management within ITS stations - a foundation for reliable cooperative ITS operations.