| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent up link transmission delay of TCP/IP communication caused by an ADSL line and to also surely transmit data upwardly. <P>SOLUTION: An ACK rewrite processing section 27 scans a transmission queue 22 and searches for an ACK in which a transmission source IP address, a destination IP address, a transmission source port number and a destination port number coincide with those of an ACK delivered from an ACK monitoring section 26 and if such a matching ACK packet is not found out, the delivered ACK is linked to the tail of the transmission queue 22 as it is. If the matching ACK packet is found out and it is an ACK packet to which datagram are attached, its ACK flag is changed into "0", for example, and the ACK is linked to the tail of the transmission queue 22. If it is an ACK packet to which datagram are not attached, on the other hand, its ACK number is rewritten into an ACK number of the ACK packet delivered from the ACK monitoring section 26. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
