Transport control server that modifies routing information

摘要

The time required for a path recalculation and a path switching upon occurrence of a failure is shortened. A path generation unit of a transport control server (TCS) S-1 generates the normal path information in accordance with the topology information of a network and the resource information which are set. Also, the path generation unit generates in advance the backup path information for occurrence of the failure based on the prediction topology information and the prediction resource information which have been modified in accordance with a predicted failure position. A path information notification unit of the TCS (S-1) notifies nodes N of the generated normal path information. A failure information acquisition unit of the TCS (S-1) detects the occurrence of the failure. If the occurrence of the failure is detected, the path information notification unit notifies the nodes N of the backup path information that is stored.

主权项

1. A transport control server connected with a network system comprising a plurality of nodes transferring data in accordance with routing information and communication lines connecting the plurality of nodes, the transport control server comprising:
a route generation unit for generating normal routing information based on topology information of the network which is set and generating alternative routing information, for a possible route failure, based on alternative topology information in which a possible route failure type including a failure of any node or communication line has been considered; a routing information notification unit for notifying the nodes of the generated normal routing information; a data storage unit for storing the generated alternative routing information; and a failure information acquisition unit for acquiring route failure information from any of the nodes which have detected the route failure, wherein if the failure information acquisition unit acquires the route failure information, the routing information notification unit notifies one or more nodes of the alternative routing information selected based on the route failure type, and the routing information of the alternative routing information is modified by the selection, wherein the route generation unit: generates the alternative routing information for each possible route failure type, and stores the generated alternative routing information in the data storage unit, wherein the transport control server further comprises: a failure type discrimination unit for discriminating the route failure type corresponding to a position of a detected route failure, if the failure information acquisition unit acquires the route failure information; and a route selection unit for selecting corresponding alternative routing information in accordance with the discriminated route failure type.