Abstract
Recently, multimedia applications such as video and audio come into wide use. When heterogeneous traffic is accommodated in a network, Call Admission Control(CAC) will be required for maintaining quality of services. Because the values of various applications are not always proportional to the bandwidth, therefore, conventional CACs, which aim to increase resource utilization under the condition that users' satisfaction is proportional to their own bandwidth, have difficulties in maximizing user satisfaction. As stated above, we proposed a novel CAC strategy for maximizing total accommodated flows based on a new philosophy that heterogeneous flows should be treated equally in networks. And we presented a theoretical analysis of the model and numerical analyses that show the effectiveness of our CAC. In this paper, we conducted a qualitative characteristic analysis of a change of an optimal threshold to realize minimum total call-blocking rate, when both traffic intensity of narrowband and broadband flow change. As a result in this characteristic analysis, we elucidated that total call blocking-rate correlate with optimal threshold under some given traffic parameter conditions. Then, we intrduce some guiding principles for developing a practical threshold configuring method.
