| 摘要 |
<p>PURPOSE:To recover cell transfer timing information to normal information in a short time when a correction disable error is produced in the cell transfer timing information. CONSTITUTION:A transmission station has means 205, 206 obtaining accumulated values of a used information cell number for each control frame and a means 210 transferring the accumulated value to a reception station as cell interval information, and a reception station has means 202, 203 obtaining a user information cell number in the unit of control frames from a difference for each control frame of the accumulated value of the user information cell number based on the reception cell interval information, a detection means 208 for presence of a code error of the cell interval information, means 209, 204 revising the control unit obtaining a transmission timing from one control frame into plural control frames sequentially, and the transmission station sets a transmission timing of the cell in the unit of plural control frames being the sum of control frames including a code error and control frames not including the code error just after the former control frames when a code error whose correction is disable is detected in the cell interval information.</p> |
