A dynamic scheduling mechanism for an effective admission control for variable-bit-rate video streams

For admission control in real time multimedia systems, buffer space, disk bandwidth and network bandwidth must be considered. Most admission control mechanisms developed to date have been based on the CBR data model and have used a static period length. These mechanisms do not use system resources effectively, since media data is usually encoded with VBR compression techniques. We propose an admission control mechanism based on a VBR data model, that has a dynamic period and considers both disk bandwidth and buffer space. Simulations show that our scheme can accept approximately twice as many streams as previous schemes based on CBR techniques and static time periods.