| 摘要 |
PROBLEM TO BE SOLVED: To prevent a packet loss, to reduce a CPU load, to make retransmission rapid, and to reduce the capacity of a buffer memory for transmission and reception. SOLUTION: A server device 1 comprises: a transmission TCP processing circuit 12 for processing transmission data; a transmission buffer circuit 13 for storing data for retransmit; a reception TCP processing circuit 16 for processing data of confirmation response packet; and a retransmit controller 10 for controlling data retransmit. The retransmit controller 10 comprises: an RTT calculation circuit 104 for calculating round trip time RTT to a destination of data on the basis of data transmission time and confirmation response packet reception time; an RTO calculation circuit 105 for calculating retransmit timeout time RTO for determining wait time up to reception of the confirmation response packet on the basis of the RTT; an RTO decision circuit 106 for determining the wait time, based on the RTO and judging whether the confirmation response packet reaches the wait time without being received; and a retransmission control circuit 107 for retransmitting data. COPYRIGHT: (C)2007,JPO&INPIT
|
