视频流点播Dynamic Batched Patching算法研究

本文提出了一个新的视频流点播传输策略,用以解决现有传输策略中存在的系统资源利用率低,QoS较差等问题.该策略的思想是服务器根据用户请求到达时刻,按动态批处理的方式来接纳并服务请求用户,每组用户必须同时从一个或两个信道接收视频内容.文中对本策略的性能进行了理论推导与定量分析,并与现有传输策略作了性能比较,最后采用仿真实验对前面的理论分析与比较进行了验证.理论分析及实验结果表明该策略是一个简单高效的传输策略,适合任意规模的点播应用.

Dynamic Batched Patching Schedules for Video Stream On-Demand Servers

A new transmission scheme called Dynamic Batched Patching was proposed to solve the problems,such as the low utilization of system resources and poor quality of service,existing in the existent schemes for video stream on demand. The key intuition behind this proposed schedule is that requests are dynamically batched according to the request arrivals,each batch of requests is served over one or two channels-either a regular channel alone or the combination of a regular channel and a patching channel.We derive a closed-form expression for the transmission channel requirements for this scheme.Our simulation experiments and theoretical arithmetic demonstrate that the proposed scheme can significantly outperform the existing schemes and it can be applied in random-scale On-Demand system.