Method and apparatus for protection path setup
AssigneeFujitsu Limited
InventorsHiroshi Kinoshita, Ayako Hashimoto, Takashi Hatano, Satsuki Norimatsu
Life of this patent
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Abstract
When setting up a working path, a protection path is automatically set up by taking each node on the working path as a start point. A working path setup request message carrying “protection needed/not-needed” information is transmitted from an ingress node toward an egress node along the route of the working path. When transferring a path setup response message as a response to it, each node autonomously determines the route of the protection path and sends out a protection path setup request message along the route of the protection path.
Claims26
A protection path setup method comprising the steps of:
- (a) setting up a working path from a start-point node to an end-point node;
- and
- (b) setting up a plurality of protection paths by taking a plurality of nodes on said working path as respective start points at the time of setting up said working path.
A node apparatus comprising:
- means for setting up a working path with its own node as a start point;
- and
- means for setting up a protection path with its own node as a start point during the setting up of said working path.
A node apparatus comprising:
- means for setting up a working path passing through its own node;
- and
- means for setting up a protection path with its own node as a start point during the setting up of said working path.
A node apparatus comprising:
- means for setting up a working path with its own node as an end point;
- and
- means for setting up a protection path with its own node as an end point during the setting up of said working path.
Dependencies are inferred from the claim text.