COMMUNICATION APPARATUS, SYSTEM, METHOD AND RECORDING MEDIUM OF PROGRAM

A communication apparatus includes a memory that stores data and a processor to execute a procedure, the procedure including, obtaining time information which indicates a communication time period in which each of a first apparatus, a second apparatus and the communication apparatus is capable of communicating, deciding on the basis of the communication time period whether or not a first communication between the communication apparatus and the first apparatus is capable of being established in a first period of time, and whether or not a second communication between the first apparatus and the second apparatus is capable of being established in a second period of time which is later than the first period of time, and notifying the first apparatus of the first period of time, in which the data stored in the memory is transmitted to the second apparatus, after confirming the second period of time.