scope:

The FlexRay communications system is an automotive focused high speed network. The FlexRay communications system is defined for advanced automotive control applications. It serves as a communication infrastructure for future generation high-speed control applications in vehicles by providing: - A message exchange service that provides deterministic cycle based message transport; - Synchronisation service that provides a common time base to all nodes; - Start-up service that provides an autonomous start-up procedure; - Error management service that provides error handling and error signalling; - Wakeup service that addresses the power management needs; 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).