A Weighted Call Admission Control for Video-on-Demand Server with Pre-Demanding

A new call admission control algorithm with WMQL scheme in a video on demand environment is introduced. In making a video selection, the proposed scheme takes into consideration the viewer waiting time and the request queue length of each video. Then, an adaptive algorithm: AWMQL scheme is developed. This policy provides pre demanding services to viewers and tries to satisfy all the requests before the deadline of viewers’ waiting tolerance. Simulation shows that the proposed scheme performs well in increasing the throughput of the VOD system, meanwhile maintaining better degree of fairness among viewers.