基于VDSL2和VLC的用户接入网系统设计及实现

摘要

This paper presents a novel subscriber access network system based on very high-bit-rate digital subscriber line(VDSL2) and visible light communication(VLC), the system uses VLC ring link instead of tra-ditional twisted pair in VDSL2 system, the paper designs a new business model of VDSL2 access network system to realize wireless transmission between VDSL2 master-slave devices. The paper fabricates experi-mental device, tests and analyzes the VLC amplitude frequency characteristics, the feasibility of master-slave device connections, the transmission rate, and the change of communication rate in different signal strength condition. The experimental results demonstrate that network connection is established under short distance testing conditions, and the total uplink-downlink rate can reach 41Mb/s, it indicates the feasibility and appli-cability of the designed system.%提出了一种结合甚高速数字用户专线(VDSL2)和可见光通信(VLC)的新型用户接入网系统,使用VLC环形链路替代VDSL2系统中的传统双绞线,设计了新型VDSL2接入网系统业务模型,实现了VDSL2主从设备之间的无线传输.通过搭建实验装置,测试和分析了VLC幅频特性、主从设备连接可行性、传输速率以及不同信号强度下的通信速率变化.实验证明该系统能在短距离条件下成功建立网络连接,上、下行双向总速率可达41Mb/s,表明了系统的可行性和适用性.