| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a processing load of detecting an abnormal state even if a cycle to obtain state information is shortened.SOLUTION: A communication node includes: a first storage unit for storing information from another communication node; a second storage unit for storing the information stored in the first storage unit; and a control unit that obtains information from another communication node at a first cycle, determines whether abnormality has occurred based on the information, if it has determined abnormality has not occurred, it stores the information in the first storage unit, and if it has determined abnormality has occurred, it stops control to store the information in the first storage and increases a count value counting the number of times when it determined abnormality occurred, obtains information from the other node at a second cycle longer than the first cycle, determines whether abnormality has occurred on the basis of the information, if it has determined abnormality has not occurred, it clears the count value, and if it has determined that abnormality has occurred, it stores the information stored in the first storage unit in the second storage on the basis of the count value.</p> |
