The potential to operate third-party terminals over multi-domain transparent optical networks attracts operators and customers to implement Optical Spectrum as a Service (OSaaS). As infrastructure information cannot always be shared with OSaaS end customers, alternatives to off-line Quality of Transmission (QoT) estimation tools are required to assess the performance of the spectrum slot in order to estimate achievable throughput. In this paper, commercially available sliceable coherent transceivers are used to assess the Generalized Signal To Noise Ratio (GSNR) based QoT of the OSaaS in a live production network for both, narrow-band and wide-band OSaaS configurations. Extended channel probing based on symbol rate variability is combined with spectral sweeping and operation regime detection to characterize OSaaS implementations on 17 links with different underlying infrastructure configurations in order to maximize capacity and increase service margins in a low-margin operation regime. We achieve 0.05 dB estimation accuracy in GSNR for a wide-band spectrum services and 0.32 dB accuracy for narrow-band spectrum services. Based on the GSNR profile, spectral misalignment, spectral ripple, and operation regime are detected and service margin improvements are demonstrated. Finally, we discuss the network optimization perspective based on acquired data from channel probing and propose use-cases for continuous channel probing in transparent optical networks.
翻译:由于基础设施信息并非总能与OSaAS终端客户共享,因此需要采用离线传输质量(QoT)估算工具来评估光谱槽的性能,以便估计可实现的吞吐量;在本文件中,利用商业上可用的切片一致收发器,评估基于通用信号噪声比率(GSNR)的OSaS通用信号噪声比率(GSNR),在现场生产网络中实施OSaS通用信号振荡率(QOT),用于窄带和宽频段OSaS配置。基于符号率变化的扩展频道探测与光谱扫荡和运行系统探测相结合,以描述OSaS在与不同基本基础设施配置的17个链接上的实施情况,从而在低边界操作系统中最大限度地扩大能力并增加服务利润幅度。我们在广带频谱服务和窄带频谱频谱服务实时网络中实现0.05 dB估计准确度。