Multi-ring network having plural rings connected by node

Details Multi-ring network having plural rings connected by node Multi-ring network having plural rings connected by node

1996-10-09

1997-08-26

Blum, Russell W.

Multiplex communications

Fault recovery

Bypass an inoperative station

370242, 370248, 370403, 370465, H04L 1246

Patent

active

056617208

ABSTRACT:
A multi-ring network structured by connecting a plurality of rings having different speeds. The multi-ring network includes a first ring structured by connecting a plurality of first nodes by a pair of ring-formed first transmission lines, a second ring structured by connecting a plurality of second nodes by a pair of ring-formed second transmission lines, and a third node for connecting the first ring and the second ring. The first transmission line has a first transmission speed and the second transmission line has a second transmission speed lower than the first transmission speed. The third node has a demultiplexer for deriving a plurality of handling group data by time division demultiplexing data having the first transmission speed, conversion means for converting data having the second transmission speed into handling group data, a plurality of highways adapted to transmit the handling group data, and a multiplexer for time division multiplexing the handling group data and outputting the multiplex data to the first transmission line. In the third node, data are handled for each handling group data as a unit and the selected handling group data is connected to the first or second ring.

REFERENCES:
patent: 4779261 (1988-10-01), Yamagishi et al.
patent: 4835763 (1989-05-01), Lau
patent: 4964120 (1990-10-01), Mostashari
patent: 5103447 (1992-04-01), Takiyasu et al.
patent: 5218604 (1993-06-01), Sosnosky
patent: 5327427 (1994-07-01), Sandesara

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