Patent ID: 8676947

Claim:
A resource reservation apparatus for controlling a resource allocation on a first route established by connecting a start node with an end node over a network, and for controlling a resource reservation on a second route and a third route respectively connecting the start node with the end node to establish dual routes, the resource reservation apparatus comprising: a resource controller configured to create a fourth route including a link obtained by excluding a common link between the first route and the second route and by excluding a common link between the first route and the third route from links included in any of the first route, the second route and the third route, so that the first route is displaced to one of the second route and the third route, and one of the second route and the third route becomes a back-up route to the second and third routes; and a message generator configured to generate a message used for reserving a resource of a link included in the fourth route and to transmit the message to a node on the fourth route, wherein a resource reserved for a link common between the first route and the second route is used and a resource reserved for a link common between the first route and the third route is used.