Network protection scheme

Details Network protection scheme Network protection scheme

1997-06-26

2000-08-29

Kizou, Hassan

Multiplex communications

Fault recovery

Bypass an inoperative station

340827, 340825, G01R 1308, H04B 338, H04Q 500

Patent

active

061118532

ABSTRACT:
A communication arrangement for use in a communication network and comprises a number of pieces of communication equipment or nodes arranged in a ring configuration of first and second ring paths operated in respective first and second opposite directions so as to provide path protection within the ring. A selected piece of equipment provides a head end for the ring. The ring is configured via said switching circuits provided in the pieces of equipment so as to provide a virtual break in a ring section adjacent the head end piece of equipment. In response to detection of a fault in a ring section the switching circuits to reconfigure the ring so as to move the virtual break from the ring section adjacent the head end piece of equipment to the ring section in which the fault has been detected so as to maintain path protection by forming two loops extending from the virtual break in the ring configuration in opposite directions to the head end.

REFERENCES:
patent: 5159595 (1992-10-01), Flanagan et al.
patent: 5307353 (1994-04-01), Yamashita et al.
patent: 5442620 (1995-08-01), Kremer
patent: 5495472 (1996-02-01), Ohara
patent: 5680235 (1997-10-01), Johansson

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