Fault-tolerant multichannel multiplexer ring configuration

Details Fault-tolerant multichannel multiplexer ring configuration Fault-tolerant multichannel multiplexer ring configuration

1996-04-29

1998-08-11

Safourek, Benedict V.

Multiplex communications

Fault recovery

Bypass an inoperative channel

370248, 370250, 370258, 371 206, H04L 122

Patent

active

057937460

ABSTRACT:
A wiring scheme for providing loop-back capability for individual failed channels around a ring network composed of nodes with limited space-switching. With this invention each node has a switch for interconnecting channels between incident links of the node. Each secure channel i has a backup channel B(i). In the normal mode of operation, the switch is configured so that the ports for channel B(i) of the incident links are connected to each other. Upon failure of channel i in one of the incident links of the node, the port for channel i of the failed link is connected to the port for channel B(i) on the other incident link of the node. With this invention when there is a failure of channel i on one of the links, the connection using this failed channel can be restored by switch configurations at only two nodes of the ring since the backup channels at the other nodes are already connected to each other.

REFERENCES:
patent: 4601028 (1986-07-01), Huffman et al.
patent: 4631719 (1986-12-01), Huffman et al.
patent: 4675862 (1987-06-01), Banzi, Jr. et al.
patent: 5440538 (1995-08-01), Olaen
patent: 5515361 (1996-05-01), Li et al.

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