Network fault recovery by controllable switching of subnetworks

Details Network fault recovery by controllable switching of subnetworks Network fault recovery by controllable switching of subnetworks

1990-11-15

1994-03-29

Evans, Arthur G.

Boots, shoes, and leggings

364200, 364DIG1, 36424295, 3642651, 3642665, 370 13, 370 161, 370 855, 371 112, H04L 1224, H04L 1226, H04L 1228, H04L 1246

Patent

active

052993124

ABSTRACT:
A subring module for controlling the switching of a subring in and out of the main network of a token passing ring has a data detection circuit for detecting a token on the network. The subring module switches between two switch positions in response to an internal state machine. The first switch position incorporates the subring into the main network, and the second switch position isolates the subring from main network. The subring module has a state machine which responds to the detection of the token on the network to switch the subring out of the network when the network is down, and to switch the subring back into the network when both the subring and the main network are up again. When a number of subrings are present, each subring has its own module and state machine control. When the network goes down, the subrings switch out at different times depending on a hierarchial priority given to the subrings. The switching of the subrings back into the network is also controlled relative to a hierarchical priority. Thus, splitting and recombining of subrings of the the token passing ring can be arranged to proceed in any desired manner. The end result is that a defective subring is automatically isolated.

REFERENCES:
patent: Re33426 (1990-11-01), Sugimoto et al.
patent: 4590468 (1986-05-01), Stieglitz
patent: 4593280 (1986-06-01), Grow
patent: 4763254 (1988-09-01), Mori et al.
patent: 4779261 (1988-10-01), Yamagishi et al.
patent: 4860284 (1989-08-01), Brown et al.
patent: 4899142 (1990-02-01), Nakayashiki et al.
patent: 4928279 (1990-05-01), Muroi
patent: 4985888 (1991-01-01), Madge et al.
patent: 4999832 (1991-03-01), Chen et al.
patent: 5012120 (1991-04-01), Minagawa et al.
patent: 5079765 (1992-01-01), Nakamura
patent: 5132962 (1992-07-01), Hobgood et al.
patent: 5136580 (1992-08-01), Videlock et al.
patent: 5146452 (1992-09-01), Pekarske
patent: 5150356 (1992-09-01), Tsutsui et al.
patent: 5200949 (1993-04-01), Kobayashi
patent: 5229988 (1993-07-01), Marbaker et al.
"Architecture and Design Considerations for a Reliable Token-Ring Network" by Bux, W., et al., (1984), pp. 15-25.
"Fault Tolerance Increasing in Token Ring Lans" by Casale, S., et al., (1988), pp. 446-452.
"Reliability Mechanisms of the FDDI High Bandwidth Token Ring Protocol" by Marjory J. Johnson, (1986), pp. 121-131.

Affiliated with

Also associated with

Rating

Network fault recovery by controllable switching of subnetworks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Network fault recovery by controllable switching of subnetworks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Network fault recovery by controllable switching of subnetworks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-799654