Token passing LAN using a plurality of tokens

Details Token passing LAN using a plurality of tokens Token passing LAN using a plurality of tokens

1985-03-05

1987-11-17

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 94, H04J 316, H04J 324

Patent

active

047078308

ABSTRACT:
A token passing local area network LAN is disclosed wherein each bus interface unit BIU monitors the token rotation time to determine if this time exceeds a predetermined maximum and, if so, creates a second token to be passed through the LAN 180.degree. out of phase with the existing token. Further, each BIU monitors token acquisition time, i.e. the time the BIU has a token to the time that the BIU has another token whether or not they are the same token, to determine whether this token acquisition time is below a predetermined minimum value and, if so, a token is destroyed such that only one token is passed between BIUs.

REFERENCES:
patent: 4439856 (1984-03-01), Ulug
patent: 4464749 (1984-08-01), Ulug
patent: 4491946 (1985-01-01), Kryskow, Jr. et al.
patent: 4500989 (1985-02-01), Dalod
patent: 4506360 (1985-03-01), Kryskow, Jr. et al.
patent: 4507777 (1985-03-01), Tucker et al.
patent: 4510599 (1985-04-01), Ulug
patent: 4517670 (1985-05-01), Ulug
patent: 4551721 (1985-11-01), Kozlik
patent: 4570257 (1986-02-01), Olson et al.
patent: 4602365 (1986-07-01), White et al.

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