Communication apparatus, system, method and recording medium of program

A communication system comprising a first apparatus, a second apparatus and a third apparatus, the first apparatus including:

• a memory that stores data;
• and
• a processor that executes a process, the process comprising:
• obtaining time information which indicates a communication time period in which each of the first apparatus, the second apparatus and the third apparatus is capable of communicating;
• deciding on the basis of the communication time period whether or not a first communication between the first apparatus and the second 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 second apparatus and the third apparatus is reserved, the second period of time being later than the first period of time, the second apparatus relaying the data stored in the memory from the first apparatus to the third apparatus during the second period of time;
• and
• notifying the second apparatus of a reservation of the first period of time of the second apparatus, in which the data stored in the memory is transmitted to the second apparatus from the first apparatus, after it is decided that the second period of time is reserved.

A communication method comprising:

• obtaining time information which indicates a communication time period in which each of a first apparatus, a second apparatus and a third apparatus is capable of communicating;
• deciding on the basis of the communication time period whether or not a first communication between the first apparatus and the second 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 second apparatus and the third apparatus is reserved, the second period of time being later than the first period of time, the second apparatus relaying data from the first apparatus to the third apparatus during the second period of time;
• and
• notifying the second apparatus of a reservation of the first period of time, in which the data is transmitted to the second apparatus from the first apparatus, after it is decided that the second period of time is reserved.

A non-transitory recording medium storing communication program that causes a computer configured to communicate with a first apparatus, which is configured to communicate with a second apparatus, to execute the procedure, the procedure comprising:

• obtaining time information which indicates a communication time period in which each of the first apparatus, the second apparatus and the computer is capable of communicating;
• deciding on the basis of the communication time period whether or not a first communication between the computer 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 data stored in the computer from the computer 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 computer is transmitted to the first apparatus from the computer, after it is decided that the second period of time is reserved.

A communication apparatus comprising:

• storing means for storing data;
• obtaining means for obtaining time information which indicates a communication time period in which each of the communication apparatus, a first apparatus and a second apparatus is capable of communicating;
• deciding means for 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 storing means from the communication apparatus to the second apparatus during the second period of time;
• and
• notifying means for notifying the first apparatus of a reservation of the first period of time, in which the data stored in the storing means is transmitted to the first apparatus from the communication apparatus, after it is decided that the second period of time is reserved.

A communication system comprising:

• a first apparatus;
• a second apparatus;
• and
• a third apparatus,
• wherein the first apparatus includes:
• storing means for storing data;
• obtaining means for obtaining time information which indicates a communication time period in which each of the first apparatus, the second apparatus and the third apparatus is capable of communicating;
• deciding means for deciding on the basis of the communication time period whether or not a first communication between the first apparatus and the second 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 second apparatus and the third apparatus is reserved, the second period of time being later than the first period of time, the second apparatus relaying the data stored in the memory from the first apparatus to the third apparatus during the second period of time;
• and
• notifying means for notifying the second apparatus of a reservation of the first period of time of the second apparatus, in which the data stored in the storing means is transmitted to the second apparatus from the first apparatus, after it is decided that the second period of time is reserved.