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