基于以太网接口的水下无线光中继通信系统设计  

Design of Underwater Wireless Optical Relay Communication System Based on Ethernet Interface

作　　者：杨祎 封一博 窦雨昂 张建磊 贺锋涛 朱云周 王晓波 高旭 李乐妍 Yang Yi;Feng Yibo;Dou Yuang;Zhang Jianlei;He Fengtao;Zhu Yunzhou;Wang Xiaobo;Gao Xu;Li Leyan(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,Shaanxi,China;Key Laboratory of Underwater Information and Control of the 705th Research Institute of China State Shipbuilding Corporation,Xi’an 710077,Shaanxi,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121 [2]中国船舶集团公司第705研究所水下信息与控制重点实验室,陕西西安710077

出　　处：《光学学报》2024年第23期18-29,共12页Acta Optica Sinica

基　　金：装备预研教育部联合基金(8091B032130);水下信息与控制重点实验室资助项目。

摘　　要：由于水下无线光通信(UWOC)在水下传输距离有限且辐照范围受环境约束,提出一种基于蓝绿波分的链式中继网络拓扑结构,在延长数据传输距离的同时也可改变数据传输方向。首先,针对电光/光电异构数据类型,设计了基于以太网数据的层级数据处理结构,解决了高速并行以太网数据到低速串行光信道数据的转换问题。其次,针对无线光数据传输模式,设计了一种引导序列、类串口字符帧结构和数据转发协议,在节省系统能耗的同时,提高了系统可靠性。最后,使用现场可编程门阵列(FPGA)实现了这些算法和协议,搭建了实验系统,探究了在不同的传输速率和接收光功率的情况下,引导序列长度对系统数据可靠传输的影响,并在3 m标准实验水箱中测试了不同速率的三点级联系统性能。实验结果表明,当引导序列长度为3~22 B时,相比于端对端通信系统数据丢帧率的传输距离,中继级联系统在相同丢帧率下可成倍地延长水下通信距离。Objective Underwater high-speed wireless communication technology is rapidly advancing,driven by increased exploration for military and scientific activities in the oceans.Compared to traditional acoustic and radio frequency communications,underwater wireless optical communication offers higher bandwidth,speed,and confidentiality.However,end-to-end wireless optical communication faces limitations in transmission distance underwater and significant environmental constraints on radiation.Given the diverse underwater environment and potential obstructions that can interrupt long-distance communication links,employing an underwater wireless optical relay network communication system can extend communication distances and enable flexible networking.Yet,the underwater wireless optical relay communication system and associated relay forwarding protocol are still in the research and simulation phase,focusing mainly on transmissive transmission.Therefore,our study designs a hierarchical data processing structure and bootstrap sequences based on the ethernet data communication interface.We also design a serial-like character frame structure and a data forwarding protocol to address the challenges of long-distance underwater transmission of standard ethernet data and flexible networking communication.Methods To facilitate underwater wireless optical relay networking communication,we design an ethernet data wireless optical relay transmission protocol under a chain network topology,using the RJ45 standard ethernet interface and data transmission protocol.This design is geared towards realizing an underwater wireless optical relay communication system.First,considering the heterogeneous data types and rates between the 100 Gbit ethernet channel and the optical channel,we develop a data matching algorithm.By writing code and utilizing field programmable gate array(FPGA)hardware,we achieve the conversion from high-speed parallel electrical signals to low-speed serial optical signals.Moreover,addressing the issues of high power

关 键 词：水下无线光通信 中继系统 以太网 异构数据 FPGA 

分 类 号：TN929.12[电子电信—通信与信息系统]