| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect inversion of a cell transmission order by the fault of one address by comparing respective points after a free address search by contention control and confirming the sequential relation. SOLUTION: After contention control, a search start pointer SP, a read pointer RP, a write pointer WP and a carry flag CRY are set. In this case, it is normal (S4) at the time RP<SP and RP<WP and not being CRY=1, it is normal (S7) at the time of not RP<SP, not RP<WP and not CRY=1 and it is normal (S8) in the case of RP<SP and not RP<WP. Also, an overflow alarm is detected (S9) at the time RP<SP and RP<WP and CRY=1, the overflow alarm is detected (S10) at the time RP<SP and RP<WP and the overflow alarm is detected (S11) at the time not RP<SP, not RP<WP and CRY=1.</p> |
