Impact of Distributed Caching on Video Streaming Quality in Information Centric Networks
Impact of Distributed Caching on Video Streaming Quality in Information Centric Networks
复制标题
分布式缓存对信息中心网络中视频流质量的影响
DOI：
10.1109/ism.2017.80
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Sadat, Mohammad Nazmus
中科院分区：
文献类型：
--
作者：
Kong, Lingchao;Zhu, Jingyi;Dai, Rui;Sadat, Mohammad Nazmus
全球视频流量需求的增长对互联网服务提供商提出了巨大的挑战。这对于智慧城市尤其重要，因为市民将被各种多媒体服务所包围。信息中心网络（ICN）范例已经被提出来处理大量的数据、用户的移动性，并且在带宽需求方面提供更好的可扩展性和效率。然而，ICN中的分布式缓存机制为视频流应用保持满意的体验质量（QoE）带来了新的挑战。由于ICN路由器的缓存能力，来自多个源的流将是常见的，并且内容源之间的切换可能会通过引起延迟并因此在视频回放中停顿来影响QoE。研究了分布式网内缓存带来的内容源切换对ICN中视频流服务质量的影响。使用从ICN仿真平台生成的视频进行人类主观测试，其中视频在不同的缓存策略和可用带宽下被流传输给人类用户。测试结果表明，随着源交换机数量的增加，对失速的满意度降低，从而导致较低的QoE分数。通过几种统计方法，在不同的视频清晰度水平下进一步量化了停顿对整体QoE的影响。
The increasing demand of global video traffic presents a grand challenge for Internet service providers. This is particularly important for Smart Cities, where the citizens will be surrounded by various multimedia services. The Information Centric Networking (ICN) paradigm has been proposed to handle the vast amount of data, mobility of users, and provide better scalability and efficiency in terms of bandwidth demand. However, the distributed caching mechanism in ICNs brings new challenges in maintaining satisfactory Quality of Experience (QoE) for video streaming applications. Because of the caching capability of ICN routers, streaming from multiple sources will be common, and switching between content sources might affect QoE by inducing delays and consequently stalls in video playback. This paper investigates the impact of content source switching, which is brought by distributed in-network caching, on the QoE for video streaming in ICNs. Human subjective tests are conducted using videos generated from an ICN emulation platform, in which the videos are streamed to human users under different caching strategies and available bandwidths. Test results indicate that, as the number of source switches increases, the satisfaction with stalling decreases and thus resulting in lower QoE scores. The impact of stalling on the overall QoE is further quantified under different video clarity levels through several statistical methods.
基于 QoE 的以网络为中心的资源分配，用于 LTE 网络上的按需上行链路自适应 HTTP 流传输
DOI：
--
发表时间：
2014
期刊：
Advanced Industrial Conference on Telecommunications
影响因子：
--
作者：
Farhan Pervez;M. Raheel
通讯作者：
M. Raheel