Abstract: A bandwidth allocation apparatus includes a request information acquisition unit configured to acquire request information indicating a required amount for a bandwidth allocation by using a communication link separated from a data link used in data communication, a determination unit configured to determine, on the basis of the request information, whether the bandwidth allocation that allows transmission of data within the designated time, to a termination apparatus is possible, and a bandwidth-allocation amount definition unit configured to, in a case where the bandwidth allocation to the termination apparatus is determined not to be possible, specify some termination apparatuses to which the bandwidth allocation that allows transmission of data within the designated time, is possible, define a bandwidth allocation amount for a specified termination apparatus, and allocate the defined bandwidth allocation amount to the specified termination apparatus.

Abstract: A transfer apparatus include a distribution unit, a storage unit, and a transfer unit, in which the distribution unit is configured to identify a plurality of networks to which frames belong, distribute the frames for each of the networks based on an identification result, and store the distributed frames in the storage unit, the storage unit is configured to store information of a time at which a frame of the frames is stored in the storage unit and the frame in association with each other, and the transfer unit is configured to detect a period of time for which the frame stays in the storage unit, detect a remaining period to send which is a remaining time of a time for which the frame is permitted to stay in the storage unit, for each of the frames, based on a difference between the time for which the frame stays in the storage unit and the delay upper limit value, and output the frame to a predetermined apparatus based on the remaining period to send.

Abstract: A bandwidth allocation apparatus includes a request information acquisition unit configured to acquire request information indicating a required amount for a bandwidth allocation by using a communication link separated from a data link used in data communication, a determination unit configured to determine, on the basis of the request information, whether the bandwidth allocation that allows transmission of data within the designated time, to a termination apparatus is possible, and a bandwidth-allocation amount definition unit configured to, in a case where the bandwidth allocation to the termination apparatus is determined not to be possible, specify some termination apparatuses to which the bandwidth allocation that allows transmission of data within the designated time, is possible, define a bandwidth allocation amount for a specified termination apparatus, and allocate the defined bandwidth allocation amount to the specified termination apparatus.