Communication apparatus and communication method

A communication apparatus including a TCP communication unit which relays TCP communication performed by an application, the communication apparatus comprising:

• a transmission unit including:
• a predetermined interval data transmission unit which transmits data at a predetermined interval;
• and
• a narrow interval data transmission unit which transmits a predetermined plurality of sets of data at an interval narrower than the predetermined interval, upon receipt of a narrow interval data transmission instruction;
• and
• a reception unit including:
• a transmission data reception unit which receives data of an application of a communication partner, and issuing a notification each time the data is received;
• a data reception interval calculation unit which decides a time interval for detecting data non-arrival, from an interval at which the transmission data reception unit receives data;
• a data non-arrival detection unit which considers data not to be arrived, in the case where the notification has not been issued from the transmission data reception unit for a predetermined time period longer than the time interval decided by the data reception interval calculation unit;
• and
• a narrow interval data transmission instruction which transmits a narrow interval data transmission instruction to the communication partner, when the data non-arrival detection unit considers data not to be arrived.

A communication method performed in a communication apparatus including a TCP communication unit which relays TCP communication performed by an application, the communication method comprising:

• transmitting data at a predetermined interval;
• notifying a communication partner of a time interval of data transmission;
• transmitting a predetermined plurality of sets of data at an interval narrower than the predetermined interval, upon receipt of a narrow interval data transmission instruction;
• and
• considering data not to be arrived and transmitting a narrow interval data transmission instruction to the communication partner, in the case where data has not been received from a communication partner for a predetermined time period longer than a time interval of data transmission received from the communication partner.