Mobile communication system, mobile station device, base station device, sgsn, ggsn, mme, mbms gw and mobile communication method

A base station device connected to a mobile communication system that performs distribution of broadcast data by an MBMS bearer service, from a BM-SC (Broadcast Multicast Service Center) to a mobile station device that is connected to a base station device, via a GGSN (Gateway GPRS Support Node) and an SGSN (Service GPRS Support Node) for which an MBMS (Multimedia Broadcast/Multicast Service) bearer has been established, wherein,

• one or multiple contents are distributed in the distribution of broadcast data,
• in the MBMS bearer service, at least, information on the MBMS bearer established by assigning MBMS bearer resources and flow identifiers for identifying the contents are included in an MBMS bearer context, and
• the base station device transmits a session stop request associated with a flow identifier included in the MBMS bearer context to the SGSN when stopping the distribution of broadcast data associated with the flow identifier included in the MBMS bearer context, and stops distribution of broadcast data.

A base station device connected to a mobile communication system that performs distribution of broadcast data by an MBMS bearer service, from a BM-SC (Broadcast Multicast Service Center) to a mobile station device that is connected to a base station device, via an MBMS GW (MBMS Gateway) and an MME (Mobility Management Entity) for which an MBMS (Multimedia Broadcast/Multicast Service) bearer has been established, wherein,

• one or multiple contents are distributed in the distribution of broadcast data,
• in the MBMS bearer service, at least, information on the MBMS bearer established by assigning MBMS bearer resources and flow identifiers for identifying the contents are included in an MBMS bearer context, and
• the base station device transmits a session stop request associated with a flow identifier included in the MBMS bearer context to the MME when stopping the distribution of broadcast data associated with the flow identifier included in the MBMS bearer context, and stops distribution of broadcast data.