Abstract: A virtual network control apparatus configured to perform assignment of physical resources under management for a virtual network embedding request, including: a physical network resource management agent configured to manage use state of resources on a physical network at each future time; and a virtual network control agent, the virtual network control agent including: demand prediction means configured to perform prediction of future demand for a virtual network; and use resource determination means configured to calculate physical resources to be used at each future time by the virtual network based on a prediction result of the demand obtained by the demand prediction means and information of future use state of resources on the physical network obtained from the physical network resource management agent, and to notify the physical network resource management agent of information of physical resources of the calculation result.

Abstract: A design apparatus is provided for designing a probability that a delivery server or a delivery route is selected for content delivery in response to a delivery request from a user. The design apparatus receives, as input parameter values, a parameter related to a network and an estimated amount of demand for delivery requests generated by users for content, and designs a selection probability that a cache server is selected as a delivery server for content delivery or a selection probability that a delivery route is selected, using model predictive control. The model predictive control uses an objective function for reducing the number of excessive delivery requests, each of which is a delivery request generated by a user for a content item and then rejected, and said delivery route is a combination of the delivery server and a delivery path on which the content is delivered by the delivery server.

Abstract: An evaluation device includes a first evaluator configured, for each record used for transmission control of data circulating in a network, to evaluate extent of variation of an amount of the data, based on a history of the amounts of the data matching a condition of the record; a second evaluator configured, for each of the records, to evaluate a size of a space represented by the record, based on the condition of the record; and a calculator configured, for each of the records, to calculate an index value representing a possibility that a predetermined or a greater amount of the data matches the condition of the record within a fixed period of time, based on an evaluation result by the first evaluator, and an evaluation result by the second evaluator. Therefore, it is possible to evaluate a possibility of a sudden occurrence of a flow whose traffic volume is large.

Abstract: A virtual network control apparatus configured to perform assignment of physical resources under management for a virtual network embedding request, including: a physical network resource management agent configured to manage use state of resources on a physical network at each future time; and a virtual network control agent, the virtual network control agent including: demand prediction means configured to perform prediction of future demand for a virtual network; and use resource determination means configured to calculate physical resources to be used at each future time by the virtual network based on a prediction result of the demand obtained by the demand prediction means and information of future use state of resources on the physical network obtained from the physical network resource management agent, and to notify the physical network resource management agent of information of physical resources of the calculation result.

Abstract: In CDN, a design apparatus for designing a probability that a delivery server or a delivery route is selected for content delivery in response to a delivery request from a user includes a parameter input unit configured to receive, as input parameter values, a parameter related to the network and an estimated amount of demand for delivery requests, a selection probability design unit configured to design, based on the received input parameter values, a selection probability that a cache server is selected as the delivery server or a selection probability that a delivery route is selected, using model predictive control, so as to reduce an excessive delivery request, which is a rejection of a delivery request, wherein the delivery route is a combination of the delivery server and a delivery path on which the content is delivered by the delivery server, and a selection probability output unit configured to output the selection probability of the cache server or the selection probability of the delivery route.

Abstract: An evaluation device includes a first evaluator configured, for each record used for transmission control of data circulating in a network, to evaluate extent of variation of an amount of the data, based on a history of the amounts of the data matching a condition of the record; a second evaluator configured, for each of the records, to evaluate a size of a space represented by the record, based on the condition of the record; and a calculator configured, for each of the records, to calculate an index value representing a possibility that a predetermined or a greater amount of the data matches the condition of the record within a fixed period of time, based on an evaluation result by the first evaluator, and an evaluation result by the second evaluator. Therefore, it is possible to evaluate a possibility of a sudden occurrence of a flow whose traffic volume is large.