Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2007-10-09
2007-10-09
Nguyen, Hanh (Department: 2616)
Multiplex communications
Fault recovery
Bypass an inoperative station
C370S535000, C370S241000, C398S001000, C398S043000, C398S015000
Reexamination Certificate
active
10654222
ABSTRACT:
Multiple working paths are established on each working rings and multiple protection paths are established on each of multiple protection rings. A working path on a first working ring spans across first and second nodes for signal transmission in a first direction of the ring, and a working path on a second working ring spans across the first and second nodes for signal transmission in a second, opposite direction of the ring. A protection path on a first protection ring spans across the first and second nodes for signal transmission in said second direction, and a protection path on a second protection ring spans across the first and second nodes for signal transmission in said first direction. The first and second nodes normally use the working paths, respectively. When one of the working paths fails, the first and second nodes use a corresponding protection path.
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Henmi Naoya
Nishio Makoto
Shimomura Hirofumi
Shiragaki Tatsuya
Takeshita Hitoshi
Nguyen Hanh
Scully , Scott, Murphy & Presser, P.C.
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