CONNECTION ADMISSION CONTROL IN ATM NETWORKS

The connection admission control is one of preventive traffic control in ATM networks. The one objective of connection admission control is to keep the network load moderate so as to achieve a performance objec tive associated with quality of services (QOS). Because the cell loss rate is more sensitive to offered load than the average queuing delay in ATM networks, QOS requirement associated with cell loss rate is con sidered. The connection admission control acts as one of the major rol es in traffic control. The job of connection admission control is to m ake an acceptance decision for connection set-up request to control th e network load. This paper proposed and evaluated a connection admissi on control method. The proposed method is suitable for real time opera tion even in large diversity of connection types, because the amount o f calculation for connection admission control is reduced remarkably c ompared to conventional algorithms. Moreover, the amount of calculatio n for the algorithm does not increase even when the number of connecti on types increases. The proposed method uses probability function for the number of cells transferred from multiplexed connections and uses recursive equations in estimating cell loss rate.