METHOD AND APPARATUS FOR DETECTING OPTICAL SIGNAL-TO-NOISE RATIO, NODE DEVICE, AND NETWORK SYSTEM

摘要

Disclosed are a method and an apparatus for detecting an optical signal-to-noise ratio (OSNR), a node device, and a network system. The method comprises: receiving a detected optical signal carrying amplified spontaneous emission (ASE) noise; detecting a first alternating component and a first direct component of the detected optical signal; acquiring first modulation information of the detected optical signal; according to the first modulation information, acquiring first correction information corresponding to the first modulation information; determining an OSNR of the detected optical signal according to the first alternating component, the first direct component, and the first correction information. In the method and apparatus for detecting an OSNR, the node device, and the network system in the embodiments of the present invention, the first correction information corresponding to the first modulation information of the detected optical signal is acquired, and the OSNR of the detected optical signal is determined according to the first correction information, thereby improving the detection accuracy of the OSNR.