针对传统智能交通系统(Intelligent Transportation System, ITS)的计算能力和通信能力无法满足其强实时性、高可靠性的需求问题, 且边缘计算(Edge Computing, EC)技术是解决强实时性和高可靠性最有效的技术途径, 设计研发了一套基于塑料光纤(Plastic Optical Fiber, POF)的智能交通EC短距离(小于100m)通信系统。该系统采用POF作为主要通信介质, 并根据通信系统的需求, 设计开发了POF的光纤网络单元(Optical Network Unit, ONU)与各类介质转换器, 实现了POF与RS485、100Mb/s以太网等标准协议接口相连。系统实现与应用表明: POF比较适用于短距离通信系统, 该系统具有传输速率快、带宽高、不受电磁干扰、弯曲半径小、弯曲柔韧性与实时性较好、成本低、可靠性高、现场部署操作方便、不易折断等优势, 因而, 所设计系统具有较好的参考与应用价值。

Edge computing (EC) technology is gradually applied in the field of Intelligent Transportation System (ITS), but the existing computing and communication capabilities can not meet the requirements of EC computing. In this paper, a communication system for EC in ITS was designed for short range communication ( less than 100m). It uses plastic optical fiber (POF) as the main communication medium and developes a POF ONU, a PoE media converter and a RS485 media converter. This allows POF to connect to other standard protocol interfaces such as RS485 and 100Mb/s Ethernet standard. The deployment and applications prove that the POF is suitable for short-distance communication system, and it presents the advantages of fast transmission rate, high bandwidth, free from electromagnetic interference, small bending radius, good bending flexibility and low cost.