Time shift retransmission system

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A problem to be solved by the present disclosure is to provide a retransmission system that automatically transmits old data, thereby eliminating the need for a special retransmission request or logic, reducing a transmission capacity, and working stably. A problem to be solved by the present disclosure is to also provide a retransmission system in which a communication load and consumed power needed for retransmitting old data are reduced. Provided is a time-shift retransmission system which is a system that manages communication of a remote sensor connected to a communication line, the time-shift retransmission system including : a) temporary storage means in which measurement values measured according to a sampling schedule by the remote sensor is temporarily stored at a predetermined interval; and b) retransmission means that retransmits the measurement values according to a retransmission schedule with plural different cycles, in which a delay time from the measurement to the retransmission differs according to the cycle, and the delay time is set in a range in which the data amount of a measurement value group that is temporarily stored within the delay time falls within the storage capacity of the temporary storage means.