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首页> 外文期刊>Parallel and Distributed Systems, IEEE Transactions on >Content-Aware Concurrent Multipath Transfer for High-Definition Video Streaming over Heterogeneous Wireless Networks
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Content-Aware Concurrent Multipath Transfer for High-Definition Video Streaming over Heterogeneous Wireless Networks

机译：基于内容的并发多路径传输，用于异构无线网络上的高清视频流

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摘要

Delivering high-definition (HD) wireless video under stringent delay constraint is challenging with regard to the limited network resources and high transmission rate. Concurrent multipath transfer (CMT) using stream control transmission protocol (SCTP) exploits the multihoming feature of mobile devices to establish associations with different access networks. In this paper, we study the multihomed HD video communication with SCTP over heterogeneous wireless networks. The existing CMT schemes mainly treat the traffic data in a content-agnostic fashion, and thus cannot effectively leverage the scarce wireless resources to maximize the perceived video quality. To address this critical issue, we propose a CMT (CMT-CA) solution that featured by the unequal frame-level scheduling based on estimated video parameters and feedback channel status. First, we develop an analytical framework to model the total distortion of parallel video transmission over multiple wireless access networks. Second, we introduce a joint congestion control and data distribution scheme to minimize the total distortion based on online quality evaluation and Markov decision process (MDP). The performance of CMT-CA is evaluated through extensive semi-physical emulations in Exata involving HD video encoded with H.264 codec. Experimental results show that CMT-CA outperforms the reference schemes in terms of video peak signal-to-noise ratio (PSNR), end-to-end delay, and goodput. Or conversely, CMT-CA achieves the same video quality with percent bandwidth conservation.
机译：考虑到有限的网络资源和高传输速率，在严格的延迟约束下交付高清（HD）无线视频具有挑战性。使用流控制传输协议（SCTP）的并发多路径传输（CMT）利用移动设备的多宿主功能来建立与不同接入网络的关联。在本文中，我们研究了通过异构无线网络使用SCTP进行的多宿主高清视频通信。现有的CMT方案主要以内容不可知的方式处理交通数据，因此不能有效地利用稀缺的无线资源来最大化感知的视频质量。为了解决这个关键问题，我们提出了一种CMT（CMT-CA）解决方案，该解决方案具有基于估计的视频参数和反馈通道状态的不平等帧级调度的功能。首先，我们开发了一个分析框架，以建模在多个无线访问网络上并行视频传输的总失真。其次，我们基于在线质量评估和马尔可夫决策过程（MDP）引入了一种联合拥塞控制和数据分发方案，以最大程度地减少总失真。通过在Exata中进行广泛的半物理仿真来评估CMT-CA的性能，该仿真涉及使用H.264编解码器编码的高清视频。实验结果表明，CMT-CA在视频峰值信噪比（PSNR），端到端延迟和吞吐量方面优于参考方案。或相反，CMT-CA通过节省带宽的方式实现了相同的视频质量。

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