Diagnostics over Internet Protocol (DoIP) (ISO 13400) brings IP-based transport to automotive diagnostics over Ethernet. In software-defined vehicles, DoIP enables high-throughput, secure communication between cloud data services (including diagnostic tools and OTA updates) and the vehicle, improving real-time data exchange and remote serviceability across the lifecycle.
High-Speed In-Vehicle Communication
DoIP provides an IP entry point to the vehicle via a DoIP gateway. The gateway routes Unified Diagnostic Services (UDS) requests to individual ECUs—many of which sit on CAN or other legacy buses—so automakers gain IP-level access to distributed systems without requiring every ECU to run an IP stack.
Cloud-Integrated Remote Diagnostics
Because DoIP rides on standard IP, it can be securely bridged to cloud backends. Vehicles and target ECUs are addressed using DoIP’s vehicle identification and logical addressing, letting cloud services interact with precise functions for fault analysis, software management, and predictive maintenance.
Working with SOME/IP
SOME/IP (Scalable service-Oriented Middleware over IP) complements DoIP by enabling service-oriented messaging and discovery among in-vehicle devices. In practice, DoIP handles diagnostic transport while SOME/IP supports distributed services and data aggregation; gateways can expose selected services to cloud applications when required.
Building Scalable, Intelligent Platforms
Together, IP-based diagnostics (DoIP), service-oriented middleware (SOME/IP), and high-bandwidth Ethernet form a foundation for scalable, cloud-integrated vehicle platforms that support faster issue resolution, safer updates, and future-ready architectures.
How Excelfore Helps
Excelfore provides standards-based connectivity and OTA solutions for intelligent vehicles.
- eSync OTA builds a scalable OTA data and update pipeline from cloud to any number of heterogeneous edge devices in the vehicle.
- eDatX selectively collects and filters vehicle data for cloud analytics, reducing transmitted volume by ~99.9% and supporting fleet-scale AI workflows.
FAQS
Q1. What is DoIP and how does it enhance vehicle connectivity?
DoIP (Diagnostics over Internet Protocol, ISO 13400) enables IP-based communication for automotive diagnostics over Ethernet. It allows high-throughput, secure interactions between cloud services and vehicle ECUs, improving real-time data exchange, remote diagnostics, and service efficiency in software-defined vehicles.
Q2. How does Excelfore support DoIP for intelligent vehicle diagnostics?
Excelfore provides standards-based protocol stacks for in-vehicle networking, including automotive ethernet TSN, SOME/IP and DoIP. In addition, Excelfore offers solutions like eSync OTA and eDatX that leverage DoIP connectivity. eSync enables secure, scalable OTA updates across vehicle ECUs, while eDatX collects and filters diagnostic data for cloud analytics, supporting predictive maintenance and AI-driven insights.
Q3. What role does SOME/IP play alongside DoIP in connected vehicles?
SOME/IP (Scalable service-Oriented Middleware over IP) complements DoIP by enabling service-oriented messaging, discovery, and data aggregation among in-vehicle devices. While DoIP handles diagnostics transport, SOME/IP facilitates distributed services and exposes selected functions to cloud applications for scalable, intelligent vehicle operations.
Q4. How does DoIP enable cloud-integrated remote diagnostics?
DoIP allows vehicles to be securely addressed via IP-level logical addressing and vehicle identification. This enables cloud services to access specific ECUs for fault analysis, software management, and predictive maintenance, reducing the need for physical diagnostics and speeding up issue resolution.
Q5. Why is DoIP critical for future-ready, software-defined vehicles?
DoIP, combined with high-bandwidth Ethernet and middleware like SOME/IP, forms the backbone of scalable, cloud-connected vehicle platforms. It enables faster updates, safer diagnostics, AI integration, and seamless connectivity—making it essential for modern intelligent, autonomous, and software-defined vehicles.
Final Thoughts
As the automotive industry accelerates toward intelligent, autonomous, and software-defined architectures, technologies like DoIP are no longer optional—they're essential. Even though DoIP refers to Diagnostics over IP, but it doesn’t just enable diagnostics; it provides a mechanism for information from devices on non-IP buses to be accessible over IP-based networks, giving modern connected vehicles the ability to integrate legacy ECUs into secure data transfer, standardized communication, and cloud-based remote diagnostic capabilities. By supporting diagnostics and communication through internet protocol software and established communication standards, DoIP unlocks an entire ecosystem of connected automotive solutions, from real-time analytics to automotive OTA and AI-driven vehicle intelligence.
With Excelfore standards-based technology stacks, automakers can confidently embrace this evolution and build vehicles that are not only connected but truly future-ready.
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