Patent ID: 7715314

Claim:
A communication terminal configured to receive a plurality of segments transmitted by a different terminal, comprising: a round trip time measuring unit configured to measure a round trip time between the communication terminal and the different terminal; a retransmission timeout time calculator configured to calculate a retransmission timeout time by using the round trip time in order to estimate a retransmission timeout time set in the different terminal; a timer configured to start a time counting operation of the retransmission timeout time when a first segment of the plurality of segments is received from the different terminal; and a segment prompt transmitter configured to transmit, to the different terminal, a segment prompt signal for prompting the different terminal to transmit a second segment which should be transmitted after the first segment from the different terminal, when the second segment is not received from the different terminal during a time from the start of the time counting operation to the completion of the retransmission timeout time.