Editing Token bus network (section)

==IEEE 802.4==
'''Token Bus''' was standardized by '''IEEE standard 802.4'''.  It was mainly used for industrial applications. Token Bus was used by [[General Motors Corporation|General Motors]] for their [[Manufacturing Automation Protocol]] (MAP) standardization effort.<ref>{{cite journal |title=The IEEE token bus-A performance bound on GM MAP |volume=35 |pages=13–17 |journal= IEEE Transactions on Industrial Electronics|date=February 1988 |author1=Weaver, A.C. |author2=Summers, C.F. |doi=10.1109/41.3057}}</ref> This differs from [[Token Ring]] networks in that the endpoints of the bus do not meet to form a physical ring.

In order to guarantee the packet delay and transmission in the Token Bus protocol, a modified Token Bus was proposed in manufacturing automation systems and [[flexible manufacturing system]] (FMS).<ref>{{cite web|url=https://www.proquest.com/docview/303683230 |title=An Industrial FMS Communication Protocol |access-date=October 8, 2023|via=ProQuest |id={{ProQuest|303683230}} }}</ref> To optimize deterministic access required by real-time [[IoT]] communication in a distributed manufacturing plant or [[IIoT]], token bus method can also be implemented according to [[IEEE 802.15.4]].  <ref>{{cite web|url=https://www.iis.fraunhofer.de/content/dam/iis/de/doc/lv/nsa/Flyer/IoT-Bus_for_Automation.pdf  |date=2023|title=IoT-Bus for automation; Albert Heuberger; Retrieved on 8 October 2023}}</ref>

A means for carrying [[Internet Protocol]] over [[IEEE 802]] networks, including token bus networks, was developed.<ref>RFC 1042</ref>

The IEEE 802.4 Working Group has disbanded and the standard has been withdrawn by the IEEE.<ref>{{cite web |url=http://www.ieee802.org/dots.shtml |title=IEEE 802 Working Group & Executive Committee Study Group Home Pages |publisher=IEEE 802 LAN/MAN Standards Committee |access-date=2012-03-21}}</ref>