Enabling Online Robust Barcode-Based Visible Light Communication With Realtime Feedback
Enabling Online Robust Barcode-Based Visible Light Communication With Realtime Feedback
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DOI：
10.1109/twc.2018.2873731
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发表时间：
2018-10
影响因子：
10.4
通讯作者：
Man Zhou;Qian Wang;Tao Lei;Zhibo Wang;K. Ren
中科院分区：
文献类型：
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作者：
Man Zhou;Qian Wang;Tao Lei;Zhibo Wang;K. Ren
基于条形码的屏幕-摄像机链路可见光通信（VLC）由于其许多理想的特性（包括免费、无需复杂的网络配置以及良好的通信安全控制）而引起了极大的研究兴趣。然而，现有的VLC系统在屏幕摄像机链路遭受低通信容量和可靠性，以及缺乏从接收器的传输反馈。本文设计了RainBar+，一个在线鲁棒的高吞吐量彩色条码VLC系统，并具有实时反馈功能，充分保证了通信的可靠性，充分利用了不同链路质量下的通信容量。据我们所知，这是第一个提供可行反馈机制的系统，使发送者能够恢复丢失的帧并优化条形码配置。为此，RainBar+从三个正交角度进行设计：优化每帧的编码容量，通过解决帧同步问题和自适应调整条形码配置来充分利用发送方的传输容量，并通过扬声器-麦克风链路的实时反馈实现选择性重传。对两款商用智能手机的广泛实验表明，RainBar+的性能优于现有系统，可以在动态环境中支持实时高吞吐量数据通信。
Barcode-based visible light communication (VLC) over screen-camera links has attracted great research interest recently due to its many desirable properties, including being free of charge, free of complex network configurations, and its well-controlled communication security. However, existing VLC systems over screen-camera links suffer from low-communication capacity and reliability, and a lack of transmission feedback from the receiver. In this paper, we design RainBar+, an online robust high-goodput color barcode-based VLC system with realtime feedback, to fully guarantee the communication reliability and exploit the communication capacity under a different link quality. To the best of our knowledge, this is the first system that provides a feasible feedback mechanism to enable the sender to retransmit the lost frames and optimize the barcode configurations. To this end, RainBar+ is designed from three orthogonal perspectives: optimizing the encoding capacity of each frame, fully utilizing the transmission capacity of the sender by solving the frame synchronization problem and adaptively adjusting the barcode configurations, and enabling the selective retransmission via realtime feedback with the speaker-microphone link. Extensive experiments with two commercial off-the-shelf smartphones show that RainBar+ outperforms existing systems and can support realtime high-goodput data communication in dynamic environments.