| 摘要 |
<p>PURPOSE:To shorten a synchronization recovery time and to prevent the deterioration of transmission efficiency at the same time by varying the bit width of a frame synchronizing signal and extending the bit only in the case of the synchronization recovery. CONSTITUTION:At the normal time when the frame synchronization is in a synchronizing state, 1-bit synchronizing pattern 103 is sent from a synchronizing pattern generating device 1. A selector 3 selects and transmits a control data signal 102. At pulling out of synchronism, the selector 3 selects and transmits an n-bit synchronizing pattern 105 of a synchronizing pattern generating device 2 based on a detection signal 108 from a detector 6. Thus, an opposite station transmits the n-bit synchronizing pattern, which is inputted in a detector 7. The detector 7 outputs a detection signal 109 and a re-synchronization section 8 performs re-synchronization. The re-synchronization is performed based on the n-bit synchronizing pattern, the recovery time can be shortened.</p> |
