Scheduling policies for an on-demand video server with batching
MULTIMEDIA '94 Proceedings of the second ACM international conference on Multimedia
Dynamic batching policies for an on-demand video server
Multimedia Systems
Metropolitan area video-on-demand service using pyramid broadcasting
Multimedia Systems
Skyscraper broadcasting: a new broadcasting scheme for metropolitan video-on-demand systems
SIGCOMM '97 Proceedings of the ACM SIGCOMM '97 conference on Applications, technologies, architectures, and protocols for computer communication
Patching: a multicast technique for true video-on-demand services
MULTIMEDIA '98 Proceedings of the sixth ACM international conference on Multimedia
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
A Low Bandwidth Broadcasting Protocol for Video on Demand
IC3N '98 Proceedings of the International Conference on Computer Communications and Networks
Video-on-Demand Server Efficiency through Stream Tapping
IC3N '97 Proceedings of the 6th International Conference on Computer Communications and Networks
A Dynamic Heuristic Broadcasting Protocol for Video-on-Demand
ICDCS '01 Proceedings of the The 21st International Conference on Distributed Computing Systems
A Permutation-Based Pyramid Broadcasting Scheme for Video-on-Demand Systems
ICMCS '96 Proceedings of the 1996 International Conference on Multimedia Computing and Systems
On Optimal Batching Policies for Video-on-Demand Storage Servers
ICMCS '96 Proceedings of the 1996 International Conference on Multimedia Computing and Systems
Hi-index | 0.24 |
Video-on-demand (VOD) is a service allowing customers to select video programs from a central server for viewing on a television or a computer screen. Traditional unicast VOD systems require huge amounts of the server network's bandwidth, so near-VOD systems using broadcast protocols have been proposed to reduce the bandwidth requirement. Although NVOD systems can service many users with less network bandwidth by broadcasting popular videos, the popularity of any given video is likely to vary widely as time goes on. However, the broadcast protocols cannot adapt to dynamic environments where the popularity distribution of videos changes, because of their fixed broadcasting schedule. 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.