| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system where distributed pieces of equipment are configured of multi-hierarchies for reducing monitor traffic, and for reducing information stored by an intermediate node, and for improving reliability, and for efficiently collecting information. <P>SOLUTION: Each node stores the last update time(LUT: Last Update Time) of a node belonging to a hierarchy immediately under the node, and performs the polling of the LUT to the node immediately under the node in predetermined timing, and when the LUT is changed, collects only the changed information (difference information) from the previous LUT from the node, and when an inquiry for the LUT is made from the upper rank node, notifies it of the LUT of its own node, and when an inquiry for the difference information is made from the node in the upper rank, transmits the difference information to the upper rank node. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
