QoT在非聚合网络场景中对光谱即服务的评估
QoT Assessment of the Optical Spectrum as a Service in Disaggregated Network Scenarios
摘要：
在多域透明光网络上运营第三方终端的潜力吸引了运营商和客户实施光谱即服务（OSaaS）。由于基础设施信息不能总是与OSaaS终端客户共享，因此需要离线传输质量（QoT）估计工具的替代品来评估频谱时隙的性能，以便估计可实现的吞吐量。在本文中，市售的可切片相干收发器被用来评估广义信噪比（GSNR）为基础的生活生产网络中的OSaaS的质量，窄带和宽带OSaaS配置。扩展信道探测的基础上的符号率的变化与频谱扫描和操作制度检测相结合，以表征OSaaS的实现在17个链接与不同的底层基础设施配置，以最大限度地提高容量和增加服务利润率在低利润率的操作制度。我们实现了0.05 dB的估计精度GSNR的宽带频谱服务和0.32 dB的精度窄带频谱服务。基于GSNR的轮廓，频谱失调，频谱纹波，和操作制度的检测和服务裕度的改善证明。最后，我们讨论了网络优化的角度，从信道探测获得的数据的基础上，并提出了透明光网络中的连续信道探测的用例。
英文摘要：
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.
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