Patent ID: 8307120

Claim:
A resource information management device comprising: a time correction unit that confirms time synchronization with a predetermined device, when resource information from the predetermined device is collected or referenced, and if time synchronization is not established, records in the resource information a generation time, corrected based on a current time of the resource information management device and a current time measured by the predetermined device; and a clocking unit that measures a sending time when request information, which requests said predetermined device to send resource information, is sent, and measures a receiving time when resource information from said predetermined device is received, wherein the resource information comprises the time measured by the predetermined device, wherein the current time of the resource information management device is a current time measured by the resource information management device when the resource information is collected or referenced, and wherein the resource information management device is implemented in a hardware device, and wherein said predetermined device is a device that has a clocking function and, at the same time, generates or collects resource information, and wherein said time correction unit is configured to: determine if time synchronization is established with said predetermined device when the resource information includes a providing time of said predetermined device, using the sending time, the receiving time, and the providing time; calculate a corrected generation time, if synchronization is not established and a generation time is included in the resource information, by subtracting a time, elapsed from the generation time to the providing time, from a middle value between the sending time and the receiving time; and record the corrected generation time in the resource information.