| 摘要 |
<p>PURPOSE:To decide the validity in a short period of time, even if a frame is long. CONSTITUTION:At the time of assembling a frame, a processing for detecting a CS trailer from a receiving cell is executed by a CS trailer extracting part 225. The CS trailer detected by the processing is stored in a prescribed area of the head page '0' by a page memory control part 223. When assembling of the frame is finished, the validity of the frame is decided by a CS sub-layer processing part 23, based on both the CS trailer stored in the head page '0' and the CS header.</p> |
