Multiplex communications – Wide area network – Packet switching
Patent
1993-09-23
1995-08-08
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 16, 359110, 371 201, H04L 100, H04L 122
Patent
active
054405386
ABSTRACT:
A communication system and a method for communicating on a communication channel are described. A substitution switch preferably comprised of high speed multiplexer and demultiplexer integrated circuits maps failed links to redundant spare links to allow communication to continue across the channel. Where there are fewer links than there are data bits in a word to be transmitted across the channel, such as when one or more links in the channel have failed and no spare links are provided, a channel width reduction switch time multiplexes bits in a data word to allow the channel to continue operating at a rate lower than its normal full-width operating rate. To allow the channel width reduction switch to implement the time multiplexing function, a substitution switch is included in the system to map failed links to desired locations in the channel width reduction switch.
REFERENCES:
patent: 3681694 (1972-08-01), Sarati
patent: 4234956 (1980-11-01), Adderley et al.
patent: 5204836 (1993-04-01), Reed
patent: 5218465 (1993-06-01), Lebby et al.
patent: 5327275 (1994-07-01), Yamane et al.
Marcelo Melvin
Massachusetts Institute of Technology
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