Sensor interface that provides a long package CRC to improve functional safety

摘要

A data transmission system comprising an Automotive Sensor Network System (ASNS) connected to a plurality of source locations via a common bus, wherein the ASNS is configured to ascertain the source from which the data-frames and first package checksum are received and based on the ascertainment of the source, appropriate decoding methods are used to calculate the ASNS location data-frame checksums and the ASNS location package checksums. A higher order redundancy check is done over a series of data-frames to detect errors in the reception caused by temporary high interference that may exist in the transmission path.

主权项

1. An automotive sensor network system to detect communication faults in a communication link and avoid safety critical failure, the automotive sensor network system comprising:
a transceiver configured to receive at least one data-frame and a first package checksum from a source location, wherein the at least one data-frame includes a first data-frame checksum calculated at the source location; a source component configured to generate a determination of the source location from which the at least one data-frame is received; a data-frame decoder component configured to calculate a second data-frame checksum for the at least one data-frame by generating a first decoding method based on the determination of the source and compare the second data-frame checksum with the first data-frame checksum; and a package decoder component configured to calculate a second package checksum for a plurality of the data-frames received from the transceiver by generating a second decoding method based on the source location and compare the second package checksum with the first package checksum.