Redundancy control device, redundancy control method, and redundancy control program

A redundancy control device for setting a redundancy for a communication system allowing communication via a network according to a set redundancy, the redundancy control device comprising:

• a storage unit, wherein the storage unit is configured to store a correspondence relation between a communication quality indicator and redundancy specifying information for specifying a redundancy to be set, and
• a processor, wherein the processor is configured to:
• receive, from an application, a use-predicted communication bandwidth which is a communication bandwidth predicted to be used in the network,
• determine a redundancy limit, which is an upper limit of a redundancy of communication by the application, based on a communication bandwidth usable in the network and the use-predicted communication bandwidth,
• set, in the communication system, a redundancy equal to or less than the determined redundancy limit as the redundancy of the communication by the application,
• acquire a communication quality indicator in the network,
• determine, based on the communication quality indicator, a recommended redundancy for the communication by the application, and
• determine a smaller value of the redundancy limit and the recommended redundancy as the redundancy of the communication by the application,
• wherein the processor is further configured to:
• specify, based on the correspondence relation, redundancy specifying information corresponding to the communication quality indicator, and
• determine the recommended redundancy based on the redundancy specifying information.