Communication Monitoring System, Base Station, History Management Server And Communication Monitoring Method

Abstract: A master station (111) and a slave station (121) each communicates exactly a set, fixed number of communication frames in a cyclic period. The aforementioned communication frames include a sequence number and a period number as communication information. When wirelessly communicating the frames, the master base station (113) and the slave base station (123) determine whether there were any dropped communication frames on the basis of the communication information of the current communication frame and the previous communication frame. If there were dropped communication frames, then the history management server (300) records the previous communication frame and the current communication frame as previous-and-current history information.

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