scope:

This part of ISO 17458 specifies the FlexRay communication protocol which is specified for a dependable automotive network. Some of the basic characteristics of the FlexRay protocol are synchronous and asynchronous frame transfer, guaranteed frame latency and jitter during synchronous transfer, prioritization of frames during asynchronous transfer, single or multi-master clock synchronisation¹⁾ time synchronisation across multiple networks, error detection and signalling, and scalable fault tolerance²⁾.

1) Multi-master clock synchronisation refers to a synchronisation that is based on the clocks of several (three or more) synchronisation masters or sync nodes.

2) Scalable fault tolerance refers to the ability of the FlexRay protocol to operate in configurations that provide various degrees of fault tolerance (i.e., single or dual channel clusters, clusters with many or few sync nodes, etc.).