基于信息熵特征的正交频分复用无源光网络系统

Orthogonal frequency division multiplexing passive optical network system based on information entropy features

越来越多的ONU接入无源光网络,易发生网络拥塞问题,信息传输延迟,数据丢包等现象出现,为此,设计了基于信息熵特征的正交频分复用无源光网络系统。由光线路终端(OLT)、光分配网络(ODN)和光网络单元(ONU)组成系统框架结构,采用分散分光形式设计系统组网结构,借助My SQL,设计系统数据库以及数据表。设计系统三个主要功能模块,即无源光信息收发模块、基于信息熵的ONU负载判断模块以及无源光网络带宽分配模块,通过合理分配带宽资源,提高无源光网络传输能力。结果表明:无源光网络系统5次轮询后传输时隙长度均在4 ms以下,无源光网络通信传输效率高,能够快速实现信息传递,极大避免时延问题。

More and more ONUs are connected to passive optical networks,which are prone to network conges-tion,information transmission delay,data packet loss,and other phenomena.Therefore,an orthogonal frequency divi-sion multiplexing passive optical network system based on information entropy characteristics is designed.The system framework structure is composed of optical line terminals(OLT),optical distribution networks(ODN),and optical network units(ONU).The system network structure is designed in a decentralized light splitting form,and the system database and data tables are designed using MySQL.Design three main functional modules of the system,namely the passive optical information transmission and reception module,the ONU load judgment module based on information entropy,and the passive optical network bandwidth allocation module.By reasonably allocating bandwidth resources,improve the transmission capacity of the passive optical network.The results show that the transmission time slot length of the passive optical network system is below 4 ms after 5 rounds of polling,and the communication transmission effi-ciency of the passive optical network is high,which can quickly achieve information transmission and greatly avoid de-lay problems.