Overview
ISO 13400-2:2019/Amd 1:2023 is an important amendment to the international standard governing diagnostic communication over Internet Protocol (DoIP) for road vehicles. This part 2 document specifically details enhancements and updates related to the transport protocol and network layer services used in DoIP. Developed by ISO Technical Committee ISO/TC 22 (Road vehicles), Subcommittee SC 31 (Data communication), this amendment reflects the latest practices and timing parameters for secure and efficient vehicle diagnostics over IP networks.
This updated standard focuses on the secure TCP connections facilitated through Transport Layer Security (TLS), refined timing parameters for DoIP message handling, and expanded payload definitions to ensure interoperable and robust diagnostic communication across a wide range of vehicular systems.
Key Topics
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Transport Protocol Enhancements
The amendment updates secure TCP connection initiation via TLS sockets. It outlines resource management for concurrent TLS-secured DoIP sessions and describes handling connection attempts beyond allocated socket limits. These improvements enhance reliability and security for over-the-air vehicle diagnostics.
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Timing and Communication Parameters
Revised timing parameters are specified for message timeouts, announcement intervals, inactivity periods, and alive checks. These include minimum and recommended timeouts for client and server DoIP entities, critical for maintaining responsiveness and network stability during diagnostic communication.
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Generic DoIP Header and Payload Structure
Updates to DoIP generic header structure and payload types enable precise message control and error handling. The amendment adds new periodic response message formats and refines vehicle identification request and response protocols to improve data synchronization and network performance.
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Status and Diagnostic Message Protocols
Enhanced message formats cover transport layer status primitives to give DoIP clients detailed insights into message transmission states such as confirmations, segment starts, and error-induced aborts, facilitating faster fault detection and recovery.
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IPv4 and IPv6 Considerations
While the amendment emphasizes IPv6 support with multicast methods, it also provides guidance on IPv4 usage scenarios, ensuring compatibility across diverse network environments.
Applications
ISO 13400-2:2019/Amd 1:2023 plays a critical role in the automotive and transportation industries by enabling standardized, secure, and efficient diagnostic communication over IP networks. Key applications include:
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Vehicle Diagnostic Tools
Supporting development of diagnostic testers that communicate with vehicle electronic control units (ECUs) via DoIP, facilitating real-time fault detection and vehicle health monitoring.
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Remote Vehicle Maintenance
Enabling automotive manufacturers and service centers to perform diagnostics, firmware updates, and troubleshooting over the internet securely using TLS-encrypted connections.
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Telematics and Connected Vehicles
Enhancing vehicle-to-infrastructure (V2I) and vehicle-to-cloud communication protocols where diagnostic data is essential for predictive maintenance, fleet management, and safety applications.
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Vehicle Network Gateway Integration
Facilitating seamless routing activation and message forwarding between onboard diagnostics and external diagnostic equipment through standardized DoIP gateways.
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Research and Development
Providing comprehensive transport and network layer references for engineers designing new vehicular diagnostic architectures or updating existing systems to comply with the latest international standards.
Related Standards
Professionals implementing or referencing ISO 13400-2:2019/Amd 1:2023 should consider related DoIP and automotive communication standards, including:
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ISO 13400-1
Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 1: General information and use case definition.
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ISO 13400-3
Diagnostic communication over Internet Protocol - Part 3: Unified diagnostic services (UDS) on DoIP.
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ISO/IEC 27001
Information security management systems standards complementing TLS security requirements for secure communication.
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ISO 14229
Unified diagnostic services (UDS) protocols for vehicle diagnostics that often operate over DoIP transport.
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ISO 11898
Controller Area Network (CAN) standard often integrated with DoIP gateways for backward compatibility with legacy vehicle networks.
For professionals seeking to ensure compliance and enhance the security, performance, and interoperability of vehicle diagnostic systems over IP networks, ISO 13400-2:2019/Amd 1:2023 provides essential technical guidance and updated protocols critical to the evolving landscape of intelligent transport systems.
