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首页> 外文期刊>IEEE transactions on multimedia >MEC-Assisted Panoramic VR Video Streaming Over Millimeter Wave Mobile Networks
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MEC-Assisted Panoramic VR Video Streaming Over Millimeter Wave Mobile Networks

机译：MEC辅助的毫米波移动网络上的全景VR视频流

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摘要

Panoramic virtual reality video (PVRV) is becoming increasingly popular since it offers a true immersive experience. However, the ultra-high resolution of PVRV requires significant bandwidth and ultra-low latency for PVRV streaming, something that makes challenging the extension of this application to mobile networks. Besides bandwidth, the frequent perspective viewport rendering induces a heavy computational load on battery-constrained mobile devices. To attack these problems jointly, this paper proposes a PVRV streaming system that is designed for modern multiconnectivity-based millimeter wave (mmWave) cellular networks in conjunction with mobile edge computing (MEC). First, mmWave is deployed to support the high bandwidth needs of PVRV streaming. Next, the multiple mmWave links that tend to suffer from outages are coupled with a sub-6 GHz link to ensure disruption-free wireless communication. With the help of an MEC server, the tradeoff among link adaptation, transcoding-based chunk quality adaptation, and viewport rendering offloading is sought to improve the wireless bandwidth utilization and mobile device's energy efficiency. Simulation results show that the proposed scheme can improve the streaming performance in both energy efficiency and the quality of received viewport over the state-of-the-art schemes.
机译：全景虚拟现实视频（PVRV）由于提供了真正的身临其境的体验而变得越来越受欢迎。但是，PVRV的超高分辨率要求PVRV流传输具有相当大的带宽和超低延迟，这对将应用程序扩展到移动网络提出了挑战。除了带宽外，频繁的透视图视口渲染还会在受电池限制的移动设备上引起较大的计算负荷。为了共同解决这些问题，本文提出了一种PVRV流传输系统，该系统设计用于结合移动边缘计算（MEC）的现代基于多连接性的毫米波（mmWave）蜂窝网络。首先，部署mmWave以支持PVRV流的高带宽需求。接下来，将容易遭受中断影响的多个mmWave链路与6 GHz以下链路相结合，以确保无干扰的无线通信。借助于MEC服务器，寻求在链路自适应，基于转码的块质量自适应和视口渲染卸载之间进行权衡，以提高无线带宽利用率和移动设备的能源效率。仿真结果表明，与现有的方案相比，该方案可以提高能效和接收视口质量。

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