GB/T 42691.2-2023 Road vehicles—Local Interconnect Network(LIN)—Part 2:Transport protocol and network layer services

Scope

This document specifies a transmission protocol and network layer services specifically designed to meet the requirements of LIN-based vehicle network systems on local interconnected networks. The protocol provides a non-acknowledging communication method.
The LIN protocol supports standardized service primitive interfaces, as defined in ISO 14229-2.
This document is applicable to transmission protocols and network layer services, supporting different application layer implementations, such as:
—— Normal communication messages;
—— Diagnostic communication messages.
The transport layer defines the data transmission method contained in a single frame or multiple frames. The transport layer frames use diagnostic frame transmission. The transport layer uses standardized APIs.
The use of the transport layer is intended for systems performing diagnostics on the backbone network (such as CAN) and systems where system designers wish to use the same diagnostic capabilities across all LIN subnet networks. In fact, the frames are identical for ISO 15765-2, and the PDU transporting the frames is very similar.
The objectives of the transport layer are:
—— Reduce the load on the LIN master node;
—— Provide all or partial diagnostics directly to the LIN slave nodes;
—— Target a collection of LIN nodes with powerful functionality (not the mainstream low-cost approach).

Development Information

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