基于级联IFFT/FFT的P2MP光收发机可扩展性分析  

Analysis of Scalability for P2MP Optical Transceiver Based on Cascaded IFFT/FFT

作　　者：杨刚 陈琳 靳唯 江明扬 黄晓宇 王新雨 YANG Gang;CHEN Lin;JIN Wei;JIANG Ming-yang;HUANG Xiao-yu;WANG Xin-yu(College of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200090,China;School of Computer Science and Electronic Engineering,Bangor University,Bangor LL571UT,UK)

机构地区：[1]上海电力大学电子与信息工程学院,上海200090 [2]班戈大学计算机科学和电子工程学院,班戈LL571UT

出　　处：《光学与光电技术》2024年第3期50-56,69,共8页Optics & Optoelectronic Technology

基　　金：国家留学基金委员会(202008310010);上海市科学技术委员会(SKLSFO2021-02、SKLSFO2022-04)资助项目。

摘　　要：点对多点(Point-to-Multipoint,P2MP)光收发机,使不同位置的多个低速光收发机同时与集中或分布在网络中心局的几个高速光收发机通信,为5G-Advanced网络提供了一种高效的解决方案。针对基于级联快速傅里叶逆变换(Inverse Fast Fourier Transform,IFFT)/傅里叶变换(Fast Fourier Transform,FFT)多信道聚合/解聚合技术,深入研究了P2MP光收发机在上行强度调制直接检测(Intensity Modulation and Direct Detection,IMDD)无源光网络(Passive Optical Network,PON)中的可扩展性。仿真结果表明:每个光网络单元(Optical Network Unit,ONU)可以自适应地改变其聚合的信道数目,而不会明显降低系统传输容量和ONU发射功率动态范围;ONU数目的增加也可以通过略微降低传输容量和ONU发射功率动态范围来有效实现。因此,该P2MP光收发机为PON提供了良好的可扩展性。Point-to-multipoint(P2MP)optical transceivers enable multiple low-speed optical transceivers at different locations to be able to simultaneously communicate with a few high-speed optical transceivers concentrated or distributed in network central offices,thus offering a cost-effective future-proof solution for 5G and beyond.A novel intensity modulation/direct(IMDD)P2MP optical transceivers incorporating inverse fast Fourier transform(IFFT)/fast Fourier transform(FFT)-based multi-channel aggregation/de-aggregation has been thoroughly explored the scalability and further evaluated its potential in upstream IMDD PONs.It cannot only operate at the'add-as-you-grow'mode,but also offer additional physical layer network security.The results show that the P2MP flexible optical transceivers equip the PONs with excellent scalability.Each ONU can adaptively change its channel count without considerably compromising transmission capacity and ONU launch power dynamic range.The increase in ONU count can also be made available by slightly compromising transmission capacity and ONU launch power dynamic range.Therefore,the flexible P2MP optical transceiver can effectively improve the scalability in IMDD PONs,and provide a technical solution for building a flexible,elastic and scalable communication network in the future.

关 键 词：点对多点光收发机 多信道聚合/解聚合 强度调制/直接检测 无源光网络 可扩展性 

分 类 号：TN913.7[电子电信—通信与信息系统]