Network data routing protection cycles for automatic...

Details Network data routing protection cycles for automatic... Network data routing protection cycles for automatic...

2003-01-27

2009-02-03

Qureshi, Afsar M. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S220000, C370S428000, C370S467000, C340S870030

Reexamination Certificate

active

07486615

ABSTRACT:
A computer network processes data packets in the event of a network link failure. The network includes a plurality of routers that deliver data packets to the network via a plurality of links. At least one router includes a protection cycle manager. The protection cycle manager has a protection cycle packet identifier and a protection cycle packet processor. The protection cycle packet identifier identifies, as protection cycle packets, data packets having a specific protection cycle format. The protection cycle packet processor processes protection cycle packets to determine whether the packet destination corresponds to the routing node, and if the packet destination corresponds to the routing node, the protection cycle packet is treated by the routing node as a data packet received from the packet source via the failed link. Otherwise, if the packet destination does not correspond to the routing node, the protection cycle packet is sent to a protection cycle node for the routing node.

REFERENCES:
patent: 5173689 (1992-12-01), Kusano
patent: 5870382 (1999-02-01), Tounai et al.
patent: 6301223 (2001-10-01), Hrastar et al.

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