可见光通信增强型WiFi系统的设计
Design of a visible-light-communication enhanced WiFi system
摘要：
可见光通信（VLC）具有宽的免许可带宽，能够在射频（RF）敏感环境中进行通信，实现节能的数据传输，并且具有通过空间重用来提高无线接入网络的容量的潜力。另一方面，WiFi提供比VLC更多的覆盖范围，并且不会由于VLC的视线（LOS）要求而遭受阻塞的可能性。为了同时利用WiFi和VLC的优势，我们提出并实现了两个具有Internet访问的异构系统。一种是混合WiFi-VLC系统，利用单向VLC信道作为下行链路，保留WiFi反向信道作为上行链路。非对称解决方案解决了光上行链路的挑战，并受益于基于VLC的全双工通信。为了进一步增强系统的鲁棒性和提高吞吐量，本文提出了另一个系统，利用Linux操作系统中的绑定技术，并行聚合WiFi和VLC。在线实验结果表明，该混合系统优于传统的WiFi在拥挤的环境中的吞吐量和网页加载时间方面，也证明了进一步提高性能的聚合系统时，考虑阻塞持续时间和接入点和用户设备之间的距离。
英文摘要：
Visible light communication (VLC) has wide unlicensed bandwidth, enables communication in radio frequency (RF) sensitive environments, realizes energy-efficient data transmission, and has the potential to boost the capacity of wireless access networks through spatial reuse. On the other hand, WiFi provides more coverage than VLC and does not suffer from the likelihood of blockage due to the light of sight (LOS) requirement of VLC. In order to take the advantages of both WiFi and VLC, we propose and implement two heterogeneous systems with Internet access. One is the hybrid WiFi-VLC system, utilizing unidirectional VLC channel as downlink and reserving the WiFi back-channel as uplink. The asymmetric solution resolves the optical uplink challenges and benefits from the full-duplex communication based on VLC. To further enhance the robustness and increase throughput, the other system is presented, in which we aggregate WiFi and VLC in parallel by leveraging the bonding technique in Linux operating system. Online experiment results reveal that the hybrid system outperforms the conventional WiFi for the crowded environments in terms of throughput and web page loading time; and also demonstrate the further improved performance of the aggregated system when considering the blocking duration and the distance between access point and user device.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
