Media Oriented Systems Transport
- Media Oriented Systems Transport
Media Oriented Systems Transport, often shortened to the acronym MOST, is a computer networking standard, intended for interconnecting multimedia components in automobiles and other vehicles. It differs from existing vehicle bus technologies, in that it's intended to be carried largely on an optical fiber bearer, thus providing a bus-based networking system at bit-rates far higher than available on previous vehicle-bus technologies.
The MOST specification defines all seven layers of the ISO/OSI Reference Model for data communication. The MOST network often employs a ring topology, but star configurations and double rings for critical applications are possible and may include up to 64 devices or nodes. A plug and play feature enables easy adding and removing of devices. A Timing Master is one of the nodes which continuously feeds data frame into the ring or acts as the gate for data. The preamble, or packet header repeatedly synchronizes the rest of the nodes called Timing Slaves. The total bandwidth (including streaming data and packed data) is approximately 23 M Baud. 60 channels, 15 MPEG1 channels are available to the user for configuration.
MOST development is done by the "MOST Cooperation", an industry-standards body consisting of automotive manufacturers (including Ford, BMW, DaimlerChrysler, and General Motors), tier-1 automotive electrical suppliers (including Infineon Technologies, Delphi E&S (former Delco), Denso (a division of Toyota), Bosch, and Hamamatsu [ [http://sales.hamamatsu.com/assets/pdf/parts_L/l8628-01b_etc_kpic1048e05.pdf "Transmitter/receiver for MOST automotive network, POF communications"] ] ), and audio-video manufacturers (including Sony, Philips, Linn Products, and Motorola). SMSC, MediaLB, and MOST are registered trademarks of SMSC. The MOST Cooperation has authorization to use it free of charge.
References
External links
* [http://www.mostcooperation.com/ MOST Cooperation homepage]
* [http://www.telos.de/most/ MOST history]
* [http://www.automotivedesignline.com/howto/198001031 Consumer and automotive electronics converge: A MOST implementation]
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