【摘要】 本文提出了一种集中式管理、点播服务器分布式放置的远程教学课件点播(Courseware On Demand-COD)系统。在这一体系结构下,采用了新的批处理信道调度策略,对用户实施多播流和补丁流相结合的组播服务,提高了网络带宽利用率,增加了可服务的点播并发流数,同时降低了课件播放延迟时间。更多还原

【Abstract】 A distance Courseware-On-Demand system with centralized management and distributed servers is introduced in this paper. Under this system structure, the paper proposes a novel channel scheduling scheme for batch processing and applies multicasting stream and patching stream together to perform multicasting service. Then, it improves the utilization ratio of network bandwidth, increases the number of served concurrent requests,and decreases the startup latency of courseware.更多还原