A Functional Addressing Method for Unified Diagnostic Services of Automotive Ethernet

Abstract

The invention discloses a UDS function addressing method based on automotive Ethernet, which is characterized in that it includes the following steps: mapping the function addressing address with the IP multicast address, establishing a mapping table and building it into the Ethernet diagnostic function According to the mapping table, the server controls the access authority of the external test equipment; sends the diagnostic communication of the functional addressing communication mode to the server; after the server receives the functional addressing diagnostic message, it performs diagnostic processing. Adopting the technical solution of the present invention, the client only needs to process once and send a data packet when processing function addressing and sending, and the processing time of the external test equipment, the overall communication time, and the occupancy of the system bandwidth are all obtained. Nicely improved.

Description

Technical field [0001] The present invention belongs to the diagnostic communication field of automotive Ethernet, in particular to a UDS (Unified Diagnostic Service) functional addressing method based on automotive Ethernet. Background technique [0002] In the automotive Ethernet technology, the diagnostic high-level data (UDS) is carried on top of DoIP (Diagnostic Communication over Internet Protocol). Specifically, it is carried on the diagnostic data packet with the load type 0x8001 in the DoIP protocol. In the current version of the DoIP protocol, it is clearly pointed out that the 0x8001 diagnostic message is carried on the TCP (Transmission Control Protocol). That is to say, DoIP-based diagnostic communication only has the capability of point-to-point communication. [0003] The diagnostic communication actually supports two communication modes, namely physical addressing and functional addressing. Physical addressing is point-to-point communication, and functional addre...

AI Technical Summary

Problems solved by technology

However, the current automotive Ethernet technology is still in the initial stage of development. The process of combining Ethernet technology with the original diagnostic communication requirements is very clumsy in the realization of function addressing.

Replacing one-to-many communication with multiple single-point communication increases the software processing complexity of the diagnostic communication initiator, and with the increase of functional addressing objects, the data packets that need to be sent for a single functional addressing communication also increase. As it increases, the processing time of the response and the bus bandwidth are wasted needlessly

However, simply using Ethernet multicast / broadcast directly to transmit function-addressed messages is only for automotive diagnostic services, which is not safe enough

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