| 摘要 |
A loss determining unit of a monitoring device calculates a receiving-time interval between a receiving time of data and the receiving time of immediately previous data. If the interval is a predetermined threshold or higher, the loss determining unit determines that "a loss is detected" and calculates the number of losses. If the number of losses is lower than the threshold, the loss determining unit determines that "no loss is detected". A failure-section determining unit calculates the number of losses occurring in a first section. The failure-section determining unit calculates the number of losses occurring in a second section. If the loss is detected in the first section, the failure-section determining unit determines that a failure occurs in the first section. If the loss is detected in the second section, the failure-section determining unit determines that a failure occurs in the second section. |
