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

摘要

The present invention discloses a method and an apparatus for detecting an optical signal-to-noise ratio, a node device, and a network system. The method includes: receiving a detected optical signal carrying amplified spontaneous emission ASE noise; detecting a first alternating current component and a first direct current component of the detected optical signal; acquiring first modulation information of the detected optical signal; acquiring first correction information corresponding to the first modulation information according to the first modulation information; and determining an optical signal-to-noise ratio OSNR of the detected optical signal according to the first alternating current component, the first direct current component, and the first correction information. The method and the apparatus for detecting an optical signal-to-noise ratio, the node device, and the network system in embodiments of the present invention can improve OSNR detection precision by acquiring the first correction information corresponding to the first modulation information of the detected optical signal, and determining the OSNR of the detected optical signal according to the first correction information.