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基于CWDM/环行器技术的5G前传承载方案研究
2021年电子技术应用第10期
杜 喆,程 明,张德智
中国电信股份有限公司研究院,上海200122
摘要: 运营商在规模建设5G前传网络时,为了节省光纤资源,大量部署了粗波分复用(Coarse Wavelength Division Multiplexing,CWDM)无源彩光设备,实现5G前传3通道承载。为满足5G多频组网以及电信联通共建共享的需求,运营商提出了包括中等波分复用(Medium Wavelength Division Multiplexing,MWDM)、细波分复用(LAN Wavelength Division Multiplexing,LWDM)、密集波分复用(Dense Wavelength Division Multiplexing,DWDM)等技术在内的多通道承载方案。在此背景下,项目组创新提出了基于CWDM/环行器技术的多通道承载方案,该方案不仅实现产业链共享、具备国产化能力最高的特点,还能够最大化降低5G前传网络建设成本。详细介绍了CWDM/环行器方案的现网部署方案以及存在的问题。
中图分类号: TN929.5
文献标识码: A
DOI:10.16157/j.issn.0258-7998.211448
中文引用格式: 杜喆,程明,张德智. 基于CWDM/环行器技术的5G前传承载方案研究[J].电子技术应用,2021,47(10):10-15,21.
英文引用格式: Du Zhe,Cheng Ming,Zhang Dezhi. Research on 5G fronthaul transmission based on CWDM/circulator technology[J]. Application of Electronic Technique,2021,47(10):10-15,21.
Research on 5G fronthaul transmission based on CWDM/circulator technology
Du Zhe,Cheng Ming,Zhang Dezhi
Research Institute of China Telecom Co.,Ltd.,Shanghai 200122,China
Abstract: When building a large-scale 5G fronthaul network, operators have deployed a large number of CWDM passive coarse wavelength division multiplexing(CWDM)equipment in order to save fiber resources to realize 3-channel fronthaul transmission.In order to meet the needs of 5G multi-frequency networking and the joint construction and sharing of China Telecom and China Unicom, operators have proposed multi-channel solutions including medium wavelength division multiplexing(MWDM), LAN wavelength division multiplexing(LWDM), dense wavelength division multiplexing(DWDM) and other technologies.In this context, the research team innovatively proposed a multi-channel solution based on CWDM/circulator technology. This solution not only achieves industry chain sharing, has the highest localization capability, but also minimizes 5G fronthaul network construction cost. This article describes in detail the current network deployment plan of the CWDM/circulator solution and the existing problems.
Key words : 5G fronthaul network;CWDM;circulator;optical reflection

0 引言

    现有5G前传采用传统CWDM无源彩光技术[1]仅能规模部署O波段前6波(1 271 nm~1 371 nm)25G光模块,满足3通道前传承载的需求[2]。为满足5G多频组网以及电信联通共建共享的需求,运营商也针对性地提出了MWDM、LWDM和DWDM等多通道解决方案[3-4],但是上述方案均存在需新开发光芯片、产业链不成熟、国产化能力不足、价格高昂等不足。为此,项目组主导提出了CWDM/环行器方案,即基于CWDM 技术O波段前6波光模块,并在无源复用/解复用器中引入新型环行器,实现由1根主干光纤完成同波长双向传输,完成6通道前传承载[5-6]




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作者信息:

杜  喆,程  明,张德智

(中国电信股份有限公司研究院,上海200122)




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