Patent ID: 8654778

Claim:
An information processing device coupled to a plurality of adjacent nodes, the information processing device comprising: a storage unit configured to store link information which indicates whether or not a packet is transmitted to and received from each adjacent node of the plurality of adjacent nodes; a traffic control unit configured to check whether or not an adjacent node exists with no packet transmitted and received of the plurality of adjacent nodes by regularly referring to the link information; and a sleep determination process unit configured to determine whether there is a possibility that packets are transmitted to a first adjacent node when no packet is transmitted to the first adjacent node of the plurality of adjacent nodes and received from the first adjacent node of the plurality of adjacent nodes, and to transmit a sleep OK notice to the first adjacent node indicating that the first adjacent node shift to a sleep mode when the sleep determination process unit determines that there is a low probability that packets are transmitted to the first adjacent node, wherein a second route is used when a transmission utilization rate of a first link constituting a first route that is currently transferring packets exceeds a first threshold, the second route includes a second link to the first adjacent node and a transmission utilization rate and an influx utilization rate of the second link are substantially zero, and the sleep determination process unit determines that there is a high probability that packets are transmitted to the first adjacent node when the transmission utilization rate of the first link exceeds a second threshold which is equal to or less than the first threshold, and determines that there is a low probability that packets are transmitted to the first adjacent node when the transmission utilization rate of the first link is less than the second threshold.