MOBILE COMMUNICATION SYSTEM, MOBILITY MANAGEMENT DEVICE, DATA DISTRIBUTION DEVICE, MOBILE COMMUNICATION METHOD, AND PROGRAM

摘要

In a mobile communication system, in which a service area is constituted of a plurality of cells each disposing a base station, and which offers a multicast service to a mobile station apparatus existing in the service area, by transmitting multicast data from a multicast service delivering apparatus to the base stations in the service area, when a session initiation request received from the multicast service delivering apparatus includes a dynamic service area constitution identifier, a cell disposed a base station apparatus in which the mobile station apparatus exists as well as cells surrounding the concerned cell is determined as a dynamic service area and a session start request is transmitted to the base stations included in the service area. As a result, multicast data will be delivered limitedly to the base stations around which a mobile terminal exists, whereby it is possible to provide a mobile communication system and the like which can perform efficient communication without using waste resources.