BS ISO 13400-2:2019

What is ISO 13400‑2 - Transport protocol and network layer services about?  

ISO 13400 is a series of international standards on road vehicles that discusses common requirements for vehicle diagnostic systems implemented on an IP communication link. 

ISO 13400‑2 is the second part of the ISO 13400 series of documents that specifies the requirements for secured and unsecured diagnostic communication between client DoIP entity and server(s) installed in the vehicle using Internet protocol (IP) as well as the transmission control protocol (TCP) and user datagram protocol (UDP).  

ISO 13400‑2 specifies features that are used to detect a vehicle in a network and enable communication with the vehicle gateway as well as with its sub-components during the various vehicle states. These features are separated into two types: mandatory and optional. 

ISO 13400‑2 specifies the following mandatory features: 

• Vehicle network integration (IP address assignment) 
• Vehicle announcement and vehicle discovery 
• Vehicle basic status information retrieval (e.g., diagnostic power mode) 
• Connection establishment (e.g., concurrent communication attempts), connection maintenance and vehicle gateway control 
• Data routing to and from the vehicle's sub-components 
• Error handling (e.g., physical network disconnect). 

ISO 13400‑2 specifies the following optional features: 

• DoIP entity status monitoring 
• Transport layer security (TLS) 
• DoIP entity firewall capabilities. 

Who is ISO 13400‑2 - Transport protocol and network layer services for? 

ISO 13400‑2 on diagnostic communication over internet protocol is relevant to: 

• Road vehicles designers and engineers 
• Electrical engineers  
• Personnel of power transmission systems 
• Programmer 
• Manufacturers of electrical and electronic equipment 

Why should you use ISO 13400‑2 - Transport protocol and network layer services?  

The interface between the vehicle's servers and the client DoIP entity addresses the specific characteristics of each new network communication technology requiring optimized data link layer definitions and transport protocol developments in order to make the new in-vehicle networks usable for diagnostic communication. ISO 13400‑2 provides the general information of DoIP connection establishment and vehicle discovery. 

ISO 13400‑2 provides guidance regarding the vehicle network integration and vehicle identification on how a vehicle and its DoIP entities can be discovered and associated with their IP addresses on the network. ISO 13400‑2 navigates you through the application (APP) requirements and implementation of DoIP. 

All transport layer services have the same general structure and to define the services, three types of service primitives are specified in ISO 13400‑2. 

ISO 13400‑2 provides details on the transport layer security (TLS) that allows establishing an authenticated and encrypted communication channel between the client DoIP entity and the server DoIP entity. 

ISO 13400‑2 explains the various parameters involved in the transport layer (TL) transmission control protocol (TCP) and Network layer (NL) internet protocol, these guarantee reliable and in-order delivery of sender-to-receiver data. 

Moreover, ISO 13400‑2 enables you to conduct diagnostic communication between external test equipment and automotive control units that will make the connectivity of next-generation vehicles more powerful and thus can see a big potential within the automotive industry. 

What’s changed since the last update?  

BS ISO 13400‑2:2019 supersedes BS ISO 13400‑2:2012. BS ISO 13400‑2:2019 includes some technical changes with respect to BS ISO 13400‑2:2012. These include: 

• Addition of TLS (Transport Layer Security) 
• Major restructuring of document content.