ABNORMALITY DETECTING DEVICE, NODE EQUIPPED WITH SAME DEVICE, AND ABNORMALITY DETECTING METHOD

摘要

PROBLEM TO BE SOLVED: To accurately detect abnormality of a node constituting a network, regarding an abnormality detecting device, a node equipped with same device, and an abnormality detecting method.;SOLUTION: The network comprises a plurality of nodes which send designated data frames out to a multiplex communication line. A transmission result sent through the multiplex communication line is monitored each time a node sends data out to the multiplex communication line. Further, the transmission success rate of the number of times of normal transmission of desired data frames to the multiplex communication line by the node is calculated from a monitoring result of the transmission result in a designated monitor period. The state (abnormal transmission state or transmission damage state) of the own node is decided based upon whether the transmission success rate reaches a 2nd threshold P2.;COPYRIGHT: (C)2006,JPO&NCIPI