arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1604.07572cs.NI
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小小区网络上的可扩展视频的QoE-Aware主动缓存

QoE-Aware Proactive Caching of Scalable Videos Over Small Cell Networks

Tong Zhen, Yuedong Xu, Tao Yang, Bo Hu

摘要:

移动视频流量的爆炸式增长对当前蜂窝网络提出了巨大的挑战。为了减轻回程链路上的压力并提高视频流服务的体验质量(QoE),引入具有缓存能力的小小区基站(SBS)来辅助内容交付。在本文中,我们提出了第一个研究的最佳缓存策略的可伸缩视频编码(SVC)流在小蜂窝网络中的信道多样性和视频可伸缩性的考虑。我们制定了一个整数规划问题,以最大限度地提高平均SVC QoE的约束下,在每个SBS的缓存大小。通过建立QoE和每个视频的缓存状态之间的联系,我们简化了SVC的主动缓存的多选择背包问题(MCKP),并提出了一个低复杂度的算法,使用动态规划。我们的主动缓存策略揭示了缓存分配到每个视频的基础上,他们的流行配置文件的结构属性。仿真结果表明,具有缓存能力的SBS可以显著提高SVC流媒体服务的平均QoE,与其他传统缓存策略相比,本文提出的缓存策略获得了显著的性能提升。

英文摘要:

The explosion of mobile video traffic imposes tremendous challenges on present cellular networks. To alleviate the pressure on backhaul links and to enhance the quality of experience (QoE) of video streaming service, small cell base stations (SBS) with caching ability are introduced to assist the content delivery. In this paper, we present the first study on the optimal caching strategy of scalable video coding (SVC) streaming in small cell networks with the consideration of channel diversity and video scalability. We formulate an integer programming problem to maximize the average SVC QoE under the constraint of cache size at each SBS. By establishing connections between QoE and caching state of each video, we simplify the proactive caching of SVC as a multiple-choice knapsack problem (MCKP), and propose a low-complexity algorithm using dynamic programming. Our proactive caching strategy reveals the structural properties of cache allocation to each video based on their popularity profiles. Simulation results manifest that the SBSs with caching ability can greatly improve the average QoE of SVC streaming service, and that our proposed caching strategy acquires significant performance gain compared with other conventional caching policies.

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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