iCast: Fine-Grained Wireless Video Streaming Over Internet of Intelligent Vehicles

被引：12

作者：

Wang, Lu ^{[1
]}

Yang, Hailiang ^{[1
]}

Qi, Xiaoke ^{[2
]}

Xu, Jun ^{[1
]}

Wu, Kaishun ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Comp Sci & Software Engn, Shenzhen 518060, Peoples R China

[2] China Univ Polit Sci & Law, Sch Informat Management Law, Beijing 100190, Peoples R China

来源：

IEEE INTERNET OF THINGS JOURNAL | 2019年 / 6卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Frequency diversity; Internet of Intelligent Vehicles(IoIV); rateless code; wireless video streaming; FRAMEWORK;

D O I：

10.1109/JIOT.2018.2872518

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Recent years have witnessed a steep grow in the multimedia-oriented Internet of Things (IoT) over vehicular networks. Huge volume of multimedia traffic generated from the in-built IoT devices should be delivered among vehicles and immediate surroundings in real time. However, as network nodes with higher mobility, vehicles often experience more unpredictable wireless channels. Such time-frequency diversity poses substantial challenges to achieve pervasive and real-time multimedia connectivity. The hurdle lies in the inability of automatically approaching the subcarrier level channel variations in the existing video codecs. With coarse-grained traffic delivery rate, video decoding fails, and intermittent connection occurs. To break this stalemate, we propose a fine-grained wireless video streaming strategy, namely iCast, that intelligently achieves the most appropriate data rate and frame protection for multimedia traffic in highly mobile vehicular environments. The insight of iCast is a simple joint source-channel rateless code. It reaps the benefits of the frequency diversity to provide fine-grained data rate for the channel in conjunction with suitable protection for the source. Our experiments show that, by harnessing frequency diversity in mobile environments, iCast outperforms the existing competitive wireless video delivery schemes by up to 5 dB peak signal-to-noise ratio.

引用

页码：111 / 123

页数：13

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