| 摘要 |
In order to efficiently utilize communication resources for a detour path for a path in a network comprising a plurality of nodes, a network management device is provided with: a path information storage unit (21) that stores a communication route between two nodes and communication resources allocated thereto; a resource information storage unit (22) that stores communication resource allocation states; an allocation state determination unit (23) that determines allocation states of communication resources expected to be allocated to a path to be registered; a primary path registration unit (24) that, in registering a primary path, if none of communication resources expected to be allocated to the primary path has been allocated to any already registered path, notifies each node on the primary path to set up the route, registers the primary path into the path information storage unit (21) and updates the allocation states of the allocated communication resources; and a backup path registration unit (25) that, in registering a backup path, if none of communication resources expected to be allocated to the backup path has been allocated to any already registered primary path, registers the backup path into the path information storage unit (21) and updates the allocation states of the allocated communication resources. |
