Patent ID: 8547866

Claim:
A route calculation system that calculates a route for passing a request flow in response to a request for flow setting between any of the nodes in a network comprising a plurality of nodes connected with each other through links, each link having a characteristic in which a link power consumption varied in accordance with a link traffic volume, the route calculation system comprising: a collection unit that collects a current link traffic volume and a link power consumption for each link included in the network; a link cost calculation unit that estimates, for each link, an increase in the link power consumption due to the request flow based on the current link traffic volume, the link power consumption, the request flow, and the characteristic, and calculates a link cost value based on the increase in the link power consumption; and a route determination unit that determines, as a route for the request flow, a route that has the smallest sum of the link cost values of each route connecting between the any nodes, wherein the link power consumption is estimated for a link having a greater link traffic volume of bi-directional links.