ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,506,675, issued on Dec. 23, was assigned to NTT Inc. (Tokyo).

"Control system, network control method and program" was invented by Masayoshi Iwamoto (Tokyo), Akito Suzuki (Tokyo) and Masahiro Kobayashi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a control system for controlling a network providing a service by using a virtual network function, the control system includes: a QoS estimation unit configured to estimate QoS at a current time of each flow in the network on a basis of observation information of the network; a QoS degradation detection unit configured to determine whether or not there QoS degradation flow is present on a basis of ...