Editing Vehicle bus (section)

== Protocols, physical media and connectors ==

There are several network types and [[Protocol (computing)|protocols]] used in vehicles by various manufactures. Many companies are encouraging a standard communication protocol, but one has not been settled on.

=== Protocols ===
Common vehicle buses protocols include:
* A²B - (Automotive Audio Bus) An audio distribution protocol developed by [[Analog Devices]][http://www.analog.com/en/landing-pages/001/a2b.html]
* [[AFDX]]
* [[ARINC 429]]
*[[Byteflight]]
* [[Controller Area Network|CAN]] – (Controller Area Network) an inexpensive low-speed serial bus for interconnecting automotive components
*[[Domestic Digital Bus (automotive)|D2B]] – (Domestic Digital Bus) a high-speed multimedia interface
*[[FlexRay]] – a general purpose high-speed protocol with safety-critical features
*[[IDB-1394]]
*[[IEBus]]
*[[I²C]]
*[[ISO 9141]]-1/-2
*[[J1708]] and [[J1587]]
*[[J1850]]
*[[J1939]] and [[ISO 11783]] – an adaptation of CAN for commercial (J1939) and agricultural (ISO 11783) vehicles
*[[Keyword Protocol 2000]] (KWP2000) – a protocol for automotive diagnostic devices (runs either on a [[Serial cable|serial]] line or over CAN)
*[[Local Interconnect Network|LIN]] – (Local Interconnect Network) a very low cost in-vehicle sub-network
*[[Media Oriented Systems Transport|MOST]] – (Media Oriented Systems Transport) a high-speed multimedia interface
*[[Multifunction Vehicle Bus]] – part of the [[Train Communication Network]] IEC 61375.
*[[SMARTwireX]]
*[[Serial Peripheral Interface Bus|SPI]]
*[[Vehicle Area Network|VAN]] – (Vehicle Area Network)
*[[UAVCAN]] – (Uncomplicated Application-level Vehicular Communication And Networking) mostly used in electric aircraft, drones, satellites, and robotics.

=== Physical transmission media ===
Some examples of physical transmission media use in vehicle networks:
* [[Local Interconnect Network|Single wire]]
* [[CAN-bus|Twisted Pair]]
* [[Fibre optic]]
* [[IEEE 1394]]<ref>{{cite journal |title=The Electric Jet |first=E.H. |last=Philips |journal=[[Aviation Week & Space Technology]] |date=5 February 2007}}</ref>
* [[MIL-STD-1553]], developed for use in military avionics, it is now widely used in spacecraft too. Adopted for the [[MiG-35]].<ref>{{cite web |url=http://www.defense-update.com/products/m/mig35.htm |title=MiG-35 Multi-Role Combat Aircraft |website=Defense Update |location=Israel |year=2009 |access-date=17 March 2007 |archive-url=https://web.archive.org/web/20070314164702/http://www.defense-update.com/products/m/mig35.htm |archive-date=14 March 2007 |url-status=dead |df=dmy-all }}</ref>
* [[MIL-STD-1773]], roughly MIL-STD-1553 with optic cabling
* [[Power line communication#Automotive|Power-line communication]] [http://www.yamar.com]

=== Connectors ===
<!-- Deleted image removed: [[Image:connectorODB2.jpg|thumb|right|On-Board Diagnostics connector]] -->
*OBD-2 (16 pin)

Additionally, many major car manufacturers use their own [[Proprietary protocol|proprietary]] vehicle bus standards, or overlay proprietary messages over open protocols such as CAN.

*J1939 (9 pin)

Commercial class vehicles have Type-I or Type-II connectors that support CAN based communication per the SAE J1939 protocol.[http://www.sae.org/standardsdev/groundvehicle/j1939a.htm]