MOBILE COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, SGSN, GGSN, MME, MBMS GW AND MOBILE COMMUNICATION METHOD

摘要

The present invention provides a mobile communication system which is capable of effectively using network resources by defining a control method for releasing network resources by a counting function of a base station device. In a mobile communication system of the present invention for performing broadcast data distribution by an MBMS bearer service from a BM-SC to a mobile station device which is connected to a base station device, via a GGSN and an SGSN for which an MBMS bearer has been established, the base station device, if broadcast data distribution which has been associated with a flow identifier included in the MBMS bearer context is to be stopped, transmits to the SGSN a session stop request which has been associated with the MBMS bearer context so as to stop the broadcast data distribution.