Performance Evaluation of Concurrent Multipath Video Streaming in Multihomed Mobile Networks
Performance Evaluation of Concurrent Multipath Video Streaming in Multihomed Mobile Networks
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DOI：
10.1155/2013/319594
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发表时间：
2013-08
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通讯作者：
James Nightingale;Qi Wang;C. Grecos
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文献类型：
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作者：
James Nightingale;Qi Wang;C. Grecos
由于网络路径的动态变化性质，特别是有限的带宽和不断变化的端到端延迟，在移动的网络中向用户提供高质量的实时视频流传输具有挑战性。在本文中，我们实证研究的多宿主移动的网络的背景下，多径流的性能。利用多个路径的聚合带宽的现有方案可以克服单个路径上的带宽限制，但是遭受由可靠传输方案中的丢失分组的重传或不可靠传输方案中的路径切换开销引起的效率损失。这项工作的重点是评估计划，允许同时使用多个路径来提供视频流。提出了一种用于并发多路径视频流的综合流传输框架，并使用当前最先进的H.264可伸缩视频编码（H.264/SVC）和下一代高效视频编码（HEVC）标准进行了实验评估。它提供了一个有价值的洞察使用这种方案的好处结合编码器特定的数据包优先级机制的质量感知数据包调度和可扩展的流。确定了部署并发多路径方案的剩余障碍，并强调了实现基于HEVC的并发多路径流的挑战。
High-quality real-time video streaming to users in mobile networks is challenging due to the dynamically changing nature of the network paths, particularly the limited bandwidth and varying end-to-end delay. In this paper, we empirically investigate the performance of multipath streaming in the context of multihomed mobile networks. Existing schemes that make use of the aggregated bandwidth of multiple paths can overcome bandwidth limitations on a single path but suffer an efficiency penalty caused by retransmission of lost packets in reliable transport schemes or path switching overheads in unreliable transport schemes. This work focuses on the evaluation of schemes to permit concurrent use of multiple paths to deliver video streams. A comprehensive streaming framework for concurrent multipath video streaming is proposed and experimentally evaluated, using current state-of-the-art H.264 Scalable Video Coding (H.264/SVC) and the next generation High Efficiency Video Coding (HEVC) standards. It provides a valuable insight into the benefit of using such schemes in conjunction with encoder specific packet prioritisation mechanisms for quality-aware packet scheduling and scalable streaming. The remaining obstacles to deployment of concurrent multipath schemes are identified, and the challenges in realising HEVC based concurrent multipath streaming are highlighted.