Optimized Monitor Placement for Accurate QoT Assessment in Core Optical Networks

摘要: Network operators deploy optical monitors to ensure uninterrupted network operation and high quality of service. To achieve this they seek efficient design solutions that also maximize the benefit their investments. In work we present a monitoring technique utilizes partial physical layer information generated by only small set deployed in mesh assess transmission (QoT) all established connections. The proposed method focuses on placement minimization required equipment. We develop heuristic takes advantage attribute certain end-to-end impairments accumulate additively along lightpaths order find optimum locations reduced number available monitors. When subset lightpaths, it is possible estimate monitored QoT-related metric for leveraging correlation between connections sharing common links. algorithm efficiently selects monitor estimation accuracy. Extensive simulation studies show provides close demonstrate fraction (1/4 or 1/3) need be equipped, leading significant cost savings. are evaluated core networks different scales presence static incremental traffic.