Adjustable broadcast protocol for large-scale near-video-on-demand systems

We introduce a dynamic broadcast protocol called Adjustable Broadcast (AB) based on on-line scheduling, which can adjust the number of channels being used on the fly. AB also exploits various prefetching strategies in the broadcast schedule to reduce the required bandwidth. And, we propose a dynamic channel allocation scheme using AB that minimizes the average viewer's waiting time. Using extensive simulation, we have demonstrated the effectiveness of AB and the adaptability of our dynamic channel allocation.