Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2011-01-25
2011-01-25
Patel, Jayanti K. (Department: 2465)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S221000, C370S225000, C370S389000
Reexamination Certificate
active
07876672
ABSTRACT:
For a survivable portion of a network, a backup port for a first router of the survivable network, to reach a destination node in the event of a single node failure, may be determined by (a) accepting a routing path graph having the destination node, wherein the routing path graph includes one or more links terminated by one or more primary ports of the first router; and (b) for each router of at least a part of the routing path graph, (1) assuming that the current router is removed, defining (A) a first part of the routing path graph including the destination node, and (B) a second part of the routing path graph separated from the first part wherein the second part defines one or more sub-graphs, and (2) determining the backup port for the first router by examining at least one of the one or more sub-graphs to find a link to the first part of the routing path graph.
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Chao Hung-Hsiang Jonathan
Xi Kang
Patel Jayanti K.
Pokotylo John C.
Polytechnic Institute of New York University
Straub & Pokotylo
Zhu Bo Hui A
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