Protection scheme for a communication network

Details Protection scheme for a communication network Protection scheme for a communication network

2008-01-29

2008-01-29

Pascal, Leslie (Department: 2613)

Optical communications

Fault recovery

C398S009000

Reexamination Certificate

active

10320244

ABSTRACT:
Method and apparatus for implementing a protection scheme for switched networks, and particularly GMPLS networks are described. One embodiment is a method of reserving communications channels comprising an alternative path through a switched network, the network comprising a plurality of nodes interconnected by links, wherein each link comprises at least one communications channel. The method comprises simulating failure of a first link; noting a second link over which traffic on the first link is rerouted in the event of failure of the first link; and transmitting a protection request message (“PRM”) from the first link to the second link to request reservation of a specified number of communication channels on the second link.

REFERENCES:
patent: 6137775 (2000-10-01), Bartlett et al.
patent: 6963995 (2005-11-01), Fee
patent: 2002/0191247 (2002-12-01), Lu et al.
patent: 2003/0065811 (2003-04-01), Lin et al.
patent: 97/01143 (1997-01-01), None

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