According to one embodiment, a system includes control apparatus and server. Control apparatus includes collector, transmitter, receiver and main controller. Collector collects sensing data concerning control targets in social infrastructure. Transmitter transmits collected sensing data to server. Receiver receives control instruction from server. Main controller controls control targets based on control instruction. Server includes acquisition unit, database, generator and instructor. Acquisition unit acquires sensing data from control apparatus. Database stores sensing data. Generator generates control instruction by processing sensing data. Instructor transmits generated control instruction to control apparatus.

A method and a device for receiving an Operation Administration and Maintenance (OAM) block are provided. The method includes: determining, by a first device, a window for detecting an OAM block at a path layer of a Metro Transport Network (MTN); detecting, by the first device, the OAM block in a block stream within the window.