Infinite queue – based connection admission control in ATM networks

Abstract

The information transfer technology of today is passing through a critical curve. Since ISDN took place with commercial introduction, a lot of standards for the broadband network have been defined. It was agreed then that ATM would be the transfer mode for the future broadband ISDN. Connection Admission Control (CAC) in ATM networks depends on a set of factors such as the characteristics of traffic and the network resources. In traditional CAC the traffic characteristics must be checked and the required network resources (i.e. bandwidth) must be checked also before the judgment of admission is madeTo release the network from the user incorrect declaration of his traffic, it was accepted to measure the number of arriving cells to enable CAC to make decisions correctly. But unfortunately this policy is advantageous only for peak cell rate declaration. In addition to the previously mentioned disadvantages the wasted time spent in checking the network resources capability for handling the waiting arriving call. To avoid the mentioned disadvantages we propose a new CAC that combines both user and measurement declaration for traffic specifications. The proposed strategy will confirm the traffic specifications after receiving it in the virtual link, which is embedded in the node (in the auxiliary memory).