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arXiv 1703.03214cs.NIcs.MM
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网络辅助多用户DASH视频流优化

Optimal Network-Assisted Multi-user DASH Video Streaming

Emre Ozfatura, Ozgur Ercetin, Hazer Inaltekin

摘要:

流媒体视频正在成为互联网上的主要流量类型,有报告预测到2019年视频内容将占所有流量的80%。随着对互联网骨干网的大量投资,主要瓶颈仍然存在于边缘服务器(例如,WiFi接入点、小型小区等)。在这项工作中,我们提出并证明了最优的多用户资源分配机制,在边缘服务器上运行,最大限度地减少了视频流由于缓冲区下溢失速的概率。我们提出的策略利用客户端的媒体呈现描述(MPD)文件,该客户端的媒体呈现描述(MPD)文件是按照HTTP上的动态自适应流传输(DASH)协议发送的,以认识到要由客户端显示的每个媒体文件的截止日期。然后,该策略按照截止日期的顺序调度用户。在建立了最优的策略,以尽量减少与固定的损失率的链路的网络的失速概率,该算法的实用性进行了验证,在现实的网络条件下,详细的NS-3模拟。

英文摘要:

Streaming video is becoming the predominant type of traffic over the Internet with reports forecasting the video content to account for 80% of all traffic by 2019. With significant investment on Internet backbone, the main bottleneck remains at the edge servers (e.g., WiFi access points, small cells, etc.). In this work, we propose and prove the optimality of a multiuser resource allocation mechanism operating at the edge server that minimizes the probability of stalling of video streams due to buffer under-flows. Our proposed policy utilizes Media Presentation Description (MPD) files of clients that are sent in compliant to Dynamic Adaptive Streaming over HTTP (DASH) protocol to be cognizant of the deadlines of each of the media file to be displayed by the clients. Then, the policy schedules the users in the order of their deadlines. After establishing the optimality of this policy to minimize the stalling probability for a network with links associated with fixed loss rates, the utility of the algorithm is verified under realistic network conditions with detailed NS-3 simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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