Patent ID: 8819246

Claim:
A communication apparatus comprising: a memory that stores data; and a processor to execute a process, the process 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 period of time for a second communication between the first apparatus and the second apparatus is reserved, the second period of time being later than the first period of time, the first apparatus relaying the data stored in the memory from the communication apparatus to the second apparatus during the second period of time; and notifying the first apparatus of a reservation of the first period of time, in which the data stored in the memory is transmitted to the first apparatus from the communication apparatus, after it is decided that the second period of time is reserved.