| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate needs for assuming an upper bound to propagation delay fluctuation, and to eliminate influences caused to a packet, even in such a network environment as the packet having an extremely large propagation delay time is to be generated. <P>SOLUTION: A client 100 includes a communication I/F 103 for transmitting a measured packet to a server 130, and receiving a reply packet responding to the measured packet; a CPU 101 for calculating a frequency ratio of a clock pulse of a self device and the clock pulse of the server 130 on the basis of a timing of transmitting the measured packet to the server 130, a timing of receiving the reply packet by the communication I/F 103, and a reception timing of the measured packet in the server 130; and a time correcting unit 107 for correcting a timing detected by an oscillator 105 and a timing counting unit 106 based on the frequency ratio calculated by the CPU 101. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
