Multiplex communications – Pathfinding or routing – Through a circuit switch
Patent
1997-03-31
1999-07-06
Pham, Chi H.
Multiplex communications
Pathfinding or routing
Through a circuit switch
370394, 370395, H04J 322, H04L 1250
Patent
active
059205580
ABSTRACT:
A switch executes complex protocol processing on control cells easily at a high speed in the same manner as normal cells are processed. The switch flexibly copes with new or modifies specifications and standards which might be established in the future for processing RM and OAM cells. Each link interface portion 1 of the ATM switch includes an input cells processing portion 7 and an output cell processing portion 8 provided at the input side and output side of a cell exchange portion 2, and cooperates with a control information maintenance portion 9 to execute application of switching information that the cell exchange portion 2 requires in input cells, and rewriting of ATM cell headers of input cells to and output cells from the cell exchange portion 2. The input cell processing portion 7 and the output cell processing portion 8 of each include a fixed sequencer and a microcode sequencer to execute complex protocol processing such as OAM, RM and other control functions in the microcode sequencer.
REFERENCES:
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patent: 5513174 (1996-04-01), Punj
patent: 5535196 (1996-07-01), Aihara et al.
patent: 5548593 (1996-08-01), Peschi et al.
patent: 5570368 (1996-10-01), Murakami et al.
patent: 5724354 (1998-03-01), Tremel et al.
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Fujisawa Toshio
Hasegawa Jun
Okada Masahiro
Saito Toshitada
Kabushiki Kaisha Toshiba
Ngo Ricky
Pham Chi H.
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