Communication network, path setting method and recording...

Details Communication network, path setting method and recording... Communication network, path setting method and recording...

2002-03-11

2008-08-12

Chan, Wing F. (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C709S239000

Reexamination Certificate

active

07411964

ABSTRACT:
To prevent load of route calculation from being centralized in part of units. A node calculates routes of a primary path and an alternate path and sends them to a management center. The management center checks whether SRLGs of the two routes overlap, and instructs the node to perform calculation again if the routes overlap. The management center searches for an alternate path having a route overlapping the route of the above described alternate path. When an overlapping alternate path exists, and SRLGs of a primary path corresponding to the alternate path and the above described primary path do not overlap, a link is shared in an overlapping portion of the routes of the two alternate paths.

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