Rare probability connection call registration method using payload type

Abstract

An improved rare probability connection call registration method using a PTI field information for an asynchronous transfer mode switching system which is capable of registering a rare probability connection code (RPCC) by using PTI field information, which includes the steps of setting a predetermined threshold value, checking payload type indication field information within each cell header which is currently being serviced, and determining whether the cell experienced congestion, continuously checking other cells when the cell did not experience congestion, increasing the congestion experienced counter value with respect to the service when the cell experienced congestion, and comparing the congestion experienced counter value with a predetermined threshold value within a previously designated unit time, clearing the congestion experienced counter value when the congestion experienced counter value is less than a predetermined threshold value within the previously designated unit time, increasing the congestion experienced counter value when the congestion experienced counter value exceeds the predetermined threshold value within a previously designated unit time, and comparing the congestion counter value with a predetermined threshold value within the previously designated unit time.