| 摘要 |
<p>If the number of frame synchronization protecting stages for the transmission signal is m (m is a natural number) and the number of protecting stages for the state notice information is n (n is a natural number), when the expression n ‰¦ m < n × 2 holds, the contents shown in the state notice information corresponding to a k-th stage (where k is a natural number fulfilling the expressing m < k ‰¦ n × 2) frame using time X as a reference are regarded as valid among the contents shown in the state notice information protected over n stages using time X as a reference. Here, time X is the time when Out of Frame occurred. As a result of protecting m stages using time X as a reference, when Out of Frame of the transmission signal has been sensed, the contents shown in the state notice information corresponding to at least the (n + 1)th stage frame and later using time X as a reference are regarded as invalid among the contents shown in the state notice information protected over n stages using time X as a reference.</p> |
