ALEXANDRIA, Va., May 5 -- United States Patent no. 12,621,684, issued on May 5, was assigned to RAKUTEN MOBILE INC. (Tokyo).

"Control system and control method" was invented by Kazushige Takeuchi (Tokyo), Masahiro Kojima (Tokyo), Kyungmin Lee (Tokyo) and Makoto Ono (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a control system and a control method which are capable of reducing a monitoring load at a time when operation control for base station systems is executed. An exceptional monitoring module (38) monitors an operation state of a representative base station system of a plurality of base station systems included in a base station system group associated with an operation tendency of b...