| 摘要 |
A method of detecting a signal degrade of transmission data, a method of detecting a restoration from a signal degrade, and a signal restoration detecting device are provided. The method of detecting a signal degrade includes measuring a discarded data rate of traffic; and comparing said discarded data rate with a threshold value to detect the signal degrade. The method of detecting restoration from a signal degrade includes obtaining a value by multiplying a threshold value, used to detect a signal degrade, by a multiplier; and comparing a discarded data rate of a control traffic after a signal degrade with said value to detect a restoration from the signal degrade. The device includes measuring means for measuring a discarded data rate of traffic; threshold value output means for outputting a threshold value; and detecting means for detecting a signal degrade by comparing said discarded data rate with said threshold value.
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