Multiplex communications – Wide area network – Packet switching
Patent
1985-09-03
1987-05-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
34082552, H04J 302
Patent
active
046673237
ABSTRACT:
A communications network is comprised of two or more stations which share mastership of the network by passing a token between them. While a station holds the token it may send low or high priority messages. It may also inform other stations of its intent to exit the network and it may solicit for new stations wanting to enter the network. The token is passed from station-to-station in accordance with a predetermined time schedule which insures each station fair access to the network while insuring that messages are conveyed between stations within a predetermined worst case time delay.
REFERENCES:
patent: 4491946 (1985-01-01), Kryskow, Jr. et al.
patent: 4506360 (1985-03-01), Kryskow, Jr. et al.
patent: 4556974 (1985-12-01), Kozlik
patent: 4583088 (1986-04-01), Bux et al.
patent: 4593280 (1986-06-01), Grow
patent: 4602365 (1986-07-01), White et al.
"Draft Standard Proway-Lan", Instrument Society of America, Jan. 1984.
"IEEE Project 802 Local Area Network Standards" IEEE Standard 802.4--1984 Token-Passing Bus Access Method and Physical Layer Specifications--The Institute of Electrical and Electronic Engineers, Inc. Jul., 1984.
Engdahl Jonathan R.
Hanneman Jeffery A.
Sweeton David C.
Allen-Bradley Company Inc.
Olms Douglas W.
Sammons Barry E.
Scutch III Frank M.
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