Video On-Demand Service via Wireless Broadcasting

Video On-Demand Service via Wireless Broadcasting
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通过无线广播的视频点播服务

DOI:
10.1109/tmc.2016.2639500
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发表时间:
2017-10
影响因子:
7.9
通讯作者:
J. Xu
J. Xu
中科院分区:
计算机科学2区
文献类型:
--
作者:
Xiaohua Tian;C. Zhao;H. Liu;J. Xu

文献摘要

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视频点播(VoD)服务在移动互联网上非常流行。随着视频内容的需求和质量越来越高,移动网络的容量需求呈爆发式增长。为了可持续地适应未来的流量增长,Verizon 等运营商开始通过广播来卸载视频流量。然而,如何提高无线广播下VoD用户的体验质量(QoE)仍然是一个悬而未决的问题,其中主要挑战是随时间变化的无线信道容量。在本文中,我们设计了一种采用周期性广播方法的无线 VoD 方案。基本思想是将视频分割成片段,然后定期通过不同的广播频道传送。我们将网络编码集成到我们的方案中,以便数据包冗余可以抵消无线不可靠性。此外,我们揭示了我们提出的方案在两个关键 QoE 指标方面可以实现的基本限制:访问延迟和连续播放的概率。然后,我们展示了两个 QoE 指标和设计参数选择之间的内在联系。还提出了 QoE 改进和带宽开销之间的权衡。我们在试验台上实施该方案并展示综合实验结果。
Video on-demand (VoD) service is very popular over the mobile Internet. With the demand and quality of video contents become increasingly high, the capacity demand on mobile networks is explosively increasing. In order to sustainably accommodate the future traffic growth, operators such as Verizon start to offload video traffic with broadcasting. However, how to improve VoD users’ quality of experience (QoE) under wireless broadcasting is still an open issue, where the major challenge is the time-varying wireless channel capacity. In this paper, we design a wireless VoD scheme with a periodic broadcasting approach. The basic idea is to fragment a video into segments, which are then delivered over different broadcasting channels periodically. We integrate network coding into our scheme so that packet redundancy can counteract the wireless unreliability. Moreover, we reveal the fundamental limits our proposed scheme can achieve in terms of two key QoE metrics: access delay and probability of continuous playout. We then show the intrinsic connections between the two QoE metrics and the choice of design parameters. The tradeoff between QoE improvement and bandwidth overhead is also presented. We implement the scheme in a testbed and demonstrate comprehensive experiment results.
DOI: 10.1007/978-1-4471-6684-9
发表时间: 2016-03
期刊: --
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影响因子: 7.9
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发表时间: 2012-04
期刊: Int. J. Digit. Multim. Broadcast.
影响因子: --
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