MOBILE COMMUNICATION SYSTEM AND ACCESS CONTROL METHOD

摘要

A mobile communication system includes a mobile station (5) connected to a core network (2) through a communication line via a base station (3a) and a radio control station (2) for controlling the setting of a radio line for the mobile station (5) in the base station (3a). The base station (3a) monitors a congestion state of the communication line, generates a state indicator indicating congestion state/non-congestion state of the communication line according to the monitoring result, and transmits it to the radio control station (2). The radio control station (2) recognizes the current state of the communication line according to the state indicator received from the base station (3a). When the radio control station (2) recognizes that the communication line is in the congestion state and receives a line connection request from the mobile station (5), it transmits a control signal for rejecting the received line connection request to the mobile station (5) without performing control for setting the radio line.