Upper and lower relays and network system

Details Upper and lower relays and network system Upper and lower relays and network system

2007-06-12

2007-06-12

Nguyen, Brian (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S244000, C709S239000

Reexamination Certificate

active

10199904

ABSTRACT:
In a network system comprising an upper relay and a plurality of lower relays connected to the upper relay with working links, the lower relays are connected with redundant links, and communication is performed through the redundant links when the working links are unavailable. Also, frames passing through a same lower relay are distributed and transmitted to the working link and the detour path (working link—lower relay—redundant link).

REFERENCES:
patent: 6621790 (2003-09-01), Wils et al.
patent: 6910149 (2005-06-01), Perloff et al.
patent: 6963575 (2005-11-01), Sistanizadeh et al.
patent: 2002/0105692 (2002-08-01), Lauder et al.
patent: 2002/0131409 (2002-09-01), Frank et al.
patent: 11-261620 (1999-09-01), None
patent: 2001-86150 (2001-03-01), None

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