A method of controlling call / connection admission by segments in an ATM access network having a dual ring structure

摘要

The present invention relates to a call / connection admission control method for a segment in an ATM access network having a dual ring structure. When a call setup message is received from a user or a network and a call connection request is received, a forward segment test A first step of checking whether a bandwidth of a segment through which a call / connection passes is sufficient; if the bandwidth is not sufficient in the first step, a rejection message is generated to request a call / connection to be blocked; if a sufficient bandwidth exists A second step of performing a backward segment test if the call / connection is bi-directional and confirming that the call / connection is bidirectional; and if the call / connection is not bidirectional or the backward segment test is successful in the second step, And a third step of extending the bandwidth of the virtual path identifier / virtual channel identifier It enables efficient resource management and call / connection admission control according to the characteristics of an ATM access network composed of a transmission standby dual ring, and can easily cope with the failure of nodes and links.