MOBILE COMMUNICATION SYSTEM, MOBILITY MANAGEMENT APPARATUS, DATA DELIVERING APPARATUS, MOBILE COMMUNICATION METHOD, AND PROGRAM

摘要

In a mobile communication system, a service area is constituted of a plurality of cells each disposing a base station, and offers a multicast service to a mobile station apparatus in the service area, by transmitting multicast data to the base stations in the service area when a session initiation request 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 to the base stations around which a mobile terminal exists, thus providing a mobile communication system which can perform efficient communication without using waste resources.