ByteFlight

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ByteFlight is a bus system developed by BMW in cooperation with Motorola , Elmos and Infineon for safety-critical applications in automotive technology. The ByteFlight system was installed in 7-, 6- and 5-series BMWs until 2007 in order to transfer time-critical data from the airbag system as well as the body electronics and the chassis . With the model overhaul of the 5 and 6 series (E6x) in 2007, ByteFlight was removed from the vehicle and replaced by a time-triggered CAN . In the 2008 7 series (F01), FlexRay will replace ByteFlight.

ByteFlight has a data rate of 10 Mbit / s and uses polymer optical fibers as the transmission medium . ByteFlight is a network in star topology with an intelligent star coupler.

In addition to the automotive technology mentioned , ByteFlight can be used in all real-time applications with extremely short latency times and high data throughput and also in environments with strong interference.

Like the CAN bus , ByteFlight also works with a message-oriented transmission protocol: All messages are made available to all ByteFlight stations. The data packets (frames) from ByteFlight are similar to the CAN data packets, the maximum length of the data field is 12 bytes. In order to achieve predictable real-time behavior, ByteFlight works with the deterministic access method TDMA , in which every connected bus station receives a defined time span (timeslot) for data transmission within a certain time.

literature

  • Karl-Heinz Dietsche, Thomas Jäger, Robert Bosch GmbH: Automotive pocket book. 25th edition, Friedr. Vieweg & Sohn Verlag, Wiesbaden, 2003, ISBN 3-528-23876-3
  • Robert Bosch (Ed.): Autoelectronics Autoelectronics. 5th completely revised and expanded edition. Vieweg & Sohn Verlag, Wiesbaden 2007, ISBN 978-3-528-23872-8