Alternative routing in PNNI hierarchical networks

Details Alternative routing in PNNI hierarchical networks Alternative routing in PNNI hierarchical networks

2000-08-07

2009-08-11

Ho, Duc C (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S401000, C370S216000, C370S255000

Reexamination Certificate

active

07573885

ABSTRACT:
Methods and apparatus are provided for alternative routing of a connection between a source node and a destination node in a PNNI hierarchical network. The alternative routing method comprises responding to a failed connection between said nodes due to a sole-access element of the network structure as seen by the source node, where a said sole-access element is an element which provides sole access to the destination node in said network structure, by: selecting at least one non-sole-access element of the route used by the failed connection in said network structure; identifying an alternative route for the connection in said network structure which does not utilize the at least one selected element; and using the alternative route for establishment of the connection between said nodes.

REFERENCES:
patent: 5831975 (1998-11-01), Chen et al.
patent: 5831982 (1998-11-01), Hummel
patent: 6304549 (2001-10-01), Srinivasan et al.
patent: 6473408 (2002-10-01), Rochberger et al.
patent: 6532237 (2003-03-01), Or et al.

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