Recursive patching: a bandwidth-efficient delivery protocol for multicast video-on-demand systems
Zhi Guo Shi, C.‐C. Jay Kuo · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001
A new scheme called recursive patching is proposed in this research to reduce the service bandwidth consumption of a video-on-demand (VOD) system by allowing later clients to merge their services with that of a preceding client that requests the same media. A series of practical on-line algorithms are presented to reduce the high complexity of the optimal recursive patching. A control window is introduced to regulate the degree of service merging. A simple greedy method without control does not work well while a cost-aware method with a carefully chosen control window can provide a simple and robust solution. Furthermore, two starting rules are considered. Our results indicate that the starting rule should be chosen carefully to match different recursive patching schemes. It is demonstrated that a cost-aware recursive patching scheme with a proper starting rule can successfully adapt to various incoming arrival distribution.