ISO/TR 13185-1:2012

Overview

ISO/TR 13185-1:2012 defines the communications architecture and a generic protocol for a standardized vehicle interface to provision and maintain Intelligent Transport System (ITS) services using nomadic and portable devices. The Technical Report describes a vehicle data transfer protocol between a vehicle gateway (the V-ITS-SG, Vehicle‑ITS‑Station Gateway) and nomadic/mobile devices (NDs), plus a set of use‑case clusters and configuration principles to support in-vehicle ITS, telematics and multimedia applications.

Key topics and technical requirements

• Communications architecture: Specifies how NDs, the V-ITS-SG and vehicle ECUs interoperate within the CALM (Communications Access for Land Mobiles) reference architecture.
• Generic protocol: Defines a common software interface and session behavior for exchanging vehicle data (OSI layers 4–7).
• V-ITS-SG concepts: Roles, short‑term and long‑term memory, diagnostic and capability logging (e.g., VSOCLogFile) and gateway responsibilities.
• Use-case definitions: Clusters include identification and vehicle info, ECU data requests, diagnostic trouble codes (DTCs), unsolicited messages, real‑time data streaming, control/adjustment of vehicle equipment, data writing, access restrictions/firewalling, EV system status, and maintenance.
• Vehicle interface standardization: Harmonization with existing automotive diagnostic and multimedia standards to enable a single access method to vehicle data.
• Security and access control: Guidance on accessibility restrictions, firewall protection and controlled data access for nomadic devices.
• Applicability to retrofit and new designs: Guidance for vehicle manufacturers and suppliers on integrating the V‑ITS‑SG into future vehicle architectures or aftermarket systems.

Practical applications and who uses it

• Vehicle manufacturers: To design in‑vehicle gateways and standardized interfaces that enable third‑party ITS services and future telematics functions.
• Telematics and ITS service providers: To access vehicle data reliably for driver advisories, traffic services, eco‑driving feedback, and connected services.
• App and nomadic device developers: To implement clients that use a common protocol to retrieve vehicle info, diagnostics and real‑time telemetry.
• Aftermarket and retrofit suppliers: To provide compliant gateway solutions that integrate with existing ECUs and support ITS services.
• Regulators and fleet operators: For consistent access to Repair and Maintenance Information (RMI), diagnostics and probe vehicle data.

Related standards

ISO/TR 13185-1 references and aligns with standards including ISO 15031, ISO 22900‑2 (MVCI D‑PDU API), ISO 22901 (ODX), ISO 22902 (AMI/vehicle interface), ISO 21217 (CALM), ISO 22837, ISO/TS 29284, ISO 27145 (WWH‑OBD) and industry standards such as SAE J2534 and SAE J2735.

Keywords: ISO/TR 13185-1:2012, vehicle interface, V-ITS-SG, ITS services, nomadic device, vehicle data access, CALM architecture, ECU diagnostics, vehicle gateway, RMI.