A communication system according to the present disclosure includes a core network apparatus and a management apparatus. The management apparatus includes a reception unit for receiving sensor information detected by a communication terminal (40) via the core network, an evaluation unit for evaluating whether or not the sensor information indicates that the communication terminal is moving, a transmission unit for transmitting information instructing the core network apparatus to stop communication related to the communication terminal to the core network apparatus. The core network apparatus includes a communication control unit for, when the communication control unit receives the information instructing the core network apparatus to stop the communication related to the communication terminal, stopping transmission of data to the communication terminal and stopping transmission of data transmitted from the communication terminal to another communication apparatus.