| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress latency accompanying extraction of information. <P>SOLUTION: A packet transfer controlling apparatus includes a depth storage unit that stores a pattern and a depth in association with each other. When accepting a setting of the pattern, the apparatus searches the depth storage unit by using the accepted pattern to obtain the depth stored in association with the pattern, thereby deriving the depth of the information to be extracted from the input packet. Upon accepting the input of the packet, information is extracted sequentially from the head of the packet. The packet transfer controlling apparatus determines whether the extracted information is positioned at a location deeper than the derived depth. When determining that the extracted information is not yet positioned at a location deeper than the derived depth, the packet transfer controlling apparatus continues extraction of information. When determining that the extracted information is positioned at a location deeper than the depth, the apparatus ends extraction of information. <P>COPYRIGHT: (C)2010,JPO&INPIT |
