[Objective]In recent years,there has been an explosive growth in data communication traffic.To address the de-mands for high-speed,high-capacity data transmission and the diversification of network application scenarios,100 Gbit/s and Beyond(B100 Gbit/s)Dense Wavelength Division Multiplexing(DWDM)hybrid networking has gradually gained attention as an efficient solution.This paper conducts an analysis of the requirements,key technologies,and practical case studies of B100 Gbit/s DWDM hybrid networking to provide technical support and guidance for constructing high-capacity and efficient communication networks.[Methods]This paper first elucidates the requirements for the development of B100 Gbit/s DWDM hybrid networks,including the need for network capacity expansion and support for complex network architectures.Next,it focuses on introducing the key technologies of B100 Gbit/s DWDM hybrid networking,including constellation shaping,spec-trum shaping,and flexible grid techniques.To support bitrate design in hybrid networking,a method for Optical Signal-to-Noise Ratio(OSNR)calculation in cascaded Erbium-Doped Fiber Amplifier(EDFA)communication systems is presented,uti-lizing parameters such as channel configuration information,signal optical power after transmitter,gain and noise parameters of EDFAs,to progressively calculate the output OSNR for each wavelength along the entire link.Finally,in conjunction with a foreign network case study and based on actual OSNR evaluation findings,a rational hybrid rate network design is per-formed,demonstrating the practical application of B100 Gbit/s DWDM hybrid networking in engineering projects.[Results]By employing B100 Gbit/s DWDM hybrid network,after flexibly configuring transmission rates and bandwidths according to OS-NR evaluations,the deployment of hybrid rate networks at 200,600 and 800 Gbit/s is achieved.This approach fulfills the high-capacity requirements of core sites while accommodating the long-distance,extensive span requirements of edge sites.Furthermore,network upgrades and expansion were smoothly accomplished within a three-year period.[Conclusion]Empirical evidence demonstrates that B100 Gbit/s DWDM networking effectively enhances network capacity,flexibility,and spectrum resource utilization.Moreover,it provides room for the continuous evolution of the networks,serving as a vital methods to ad-vance the development of high-capacity optical transmission networks.
维普
万方数据