ATM CELL HIGH TRAFFIC DETECTING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To prevent the deterioration of transmission efficiency due to re- transmission by detecting that input traffic is beyond a prescribed level against the processing capability of this device informing a host of alarm, and detecting high traffic. SOLUTION: A Ta counter 102 counts the number (m) of input ATM cells per a unit time (ta) from an asynchronous transfer mode(ATM) line side. A Tb counter 103 counts the number of output ATM cells per a unit time to a device bus. A timer 104 supplies a treference time to the Ta counter 102 and the Tb counter 103. A comparing part 105 obtains n/ta(input traffic) from the Ta counter 102 and m/tb(device processing capability) from the Tb counter 103 in a constant cycle, and compares them. Then, at the time of judging the high traffic high traffic alarm is informed to a host 120. The host 120 acts on a communicating opposite terminal so that the input traffic can be decreased.