A Unified Admission Control Algorithm

Call admission control (CAC) plays a significant role in communication networks. In heterogeneous environments, CAC performs differrent function in different segments along with an end-to-end data path. In this paper, an end-to-end CAC model in transport layer is presented. Further, a unified CAC (U-CAC) algorithm is proposed , which manage different kinds of upstream traffics from different access networks. The algorithm is based both on the traffic class, the access network type and the user requirment and is-realized-using-genetic-algorithms-(GAs). In addition, priority schemes have been proposed to guarantee QoS for higher class users. For the simulation analysis, we consider two different services and two different access networks. The results reveal that the proposed algorithm provides the optimal threshold values for resource reservation and achieves the reasonable call admitted probabilities.