Multiplex communications – Fault recovery – Bypass an inoperative station
Patent
1995-03-28
1997-04-22
Olms, Douglas W.
Multiplex communications
Fault recovery
Bypass an inoperative station
39518202, H04J 314, G06F 1116
Patent
active
056234821
ABSTRACT:
An interlocking apparatus capable of expanding a network while effectively using survivability of a self-healing ring, including a ring network connecting a plurality of nodes having a loop back function and a supplementary node connected to the first and second nodes of the ring netwrok. In the first node, a service selector selects a normal signal from the two signals sent from the second node and the supplementary node to output the selected signal to a next stage node. In the supplementary node, a path selector selects a normal signal from the two signals sent from the first and second nodes to output the selected signal outside the ring network. The service selector and the path selector include a monitor controller for always selecting the normal signal from the two input signals and further judge and determine a trigger for executing a switching or a switching direction in an autonomous distributed manner.
REFERENCES:
patent: 5406549 (1995-04-01), Kremer
patent: 5440540 (1995-08-01), Kremer
patent: 5446725 (1995-08-01), Ishiwatari
H. Sakauchi, "A Self-Healing Network With An Economical Spare-Channel Assignment", IEEE Global Telecommunications Conference, Dec. 2-5, 1990.
A Fast Distributed Restoration Technique For Networks Using Digital Cross Connect Machines; Author: W.D. Grover; Globecomm '87, pp. 1090-1095.
Failure Immunization Technology For Network Service Survivability (Fitness); Authors: C. Han Yang and Satoshi Hasegawa; pp. 1549-1554.
Sonet Line Protection Switched Ring APS Protocol; Authors: J. Baroni, W. Kremer, P.N. Lamy, W.C. Marra, M.J. Soulliere; Feb. 6, 1991.
Synchronous Optical Network (Sonet): Automatic Protection Switching; American National Standard For Telecommunications; Exchange Carriers Standards Association.
Sonet Bidirectional Line Switched Ring Equipment Generic Criteria; Bell Communications Research; Technical Advisory TA-NWT-001230, Issue 2, Apr. 1992.
Jung Min
NEC Corporation
Olms Douglas W.
LandOfFree
Interlocking apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interlocking apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interlocking apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-346683