论文标题

SVC如何在MEC中启用分布式缓存?

How SVC enables Distributed Caching in MEC?

论文作者

Batabyal, Suvadip

论文摘要

随着对互联网视频服务的交付需求的不断增长,服务提供商面临着巨大的挑战,即在第秒延迟下交付Ultra-HD(2K/4K)视频。多访问边缘计算(MEC)平台实际上通过在蜂窝网络边缘缓存流行内容来帮助实现这一目标。这不仅降低了交付延迟,还减少了后期链接的负载和成本。但是,在存储和处理能力方面,MEC平台受到限制资源的困扰;集中式内容的内容可能通过降低卸载概率来消除降低潜伏期的优势。边缘的分布式缓存不仅提高了卸载概率,还可以动态调整MEC服务器之间的负载分布。在本文中,我们通过利用可扩展视频编码技术的特征来提出一种用于部署MEC平台的体系结构。内容提供程序使用分层视频编码技术(例如可扩展视频编码(SVC))来调整网络动态,并通过动态删除数据包来调整网络动力学,以减少延迟。我们展示了SVC视频如何轻松借给边缘分发缓存。然后,我们通过将视频层存储在访问网络的不同部分来研究延迟存储权衡。

With an ever increasing demand for the delivery of internet video service, the service providers are facing a huge challenge to deliver ultra-HD (2k/4k) video at sub-second latency. The multi-access edge computing (MEC) platform actually helps in achieving this objective by caching popular contents at the edge of cellular network. This not only reduces the delivery latency, but also the load and the cost of the backhaul links. However, MEC platforms are afflicted by constrained resources in terms of storage and processing capabilities; and centralized caching of contents may nullify the advantage of reduced latency by lowering the offloading probability. Distributed caching at the edge not only improves the offloading probability, but also dynamically adjusts the load distribution among the MEC servers. In this article, we propose an architecture for deployment of MEC platforms by exploiting the characteristics of a scalable video encoding technique. The layered video coding techniques, such as the scalable video coding (SVC), is used by the content providers to adjust to the network dynamics, by dynamically dropping packets in order to reduce latency. We show how an SVC video easily lends itself to distributed caching at the edge. Then we investigate the latency-storage trade-off by storing the video layers at different parts of the access networks.

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