Due to the fact that Quality of Service (QoS) requirements are not asstringent for non-real-time traffic types, as opposed to real-time traffic,more calls can be accommodated by releasing some bandwidth from the existingnon-real-time traffic calls. If the released bandwidth to accept a handovercall is larger than to accept a new call, then the probability of dropping acall is smaller than the probability of blocking a call. In this paper wepropose an efficient Call Admission Control (CAC) that relies on adaptivemulti-level bandwidth-allocation scheme for non-real-time calls. The featuresof the scheme allow reduction of the call dropping probability along with theincrease of the bandwidth utilization. The numerical results show that theproposed scheme is able to attain negligible handover call dropping probabilitywithout sacrificing bandwidth utilization.
展开▼
