MULTICAST SERVICE PROVIDING SYSTEM, MULTICAST SERVICE PROVIDING METHOD, INFORMATION DISTRIBUTOR, RADIO TERMINAL, AND RADIO BASE STATION

摘要

A multicast service providing system for providing a distribution service of multicast information from an information distributor to a radio terminal in a service area through a radio section, in which the radio terminal has service continuation request means for transmitting a service continuation request signal for requesting continuation of a distribution service of multicast information to the information distributor. The information distributor has service continuation managing means for managing a request for the multicast information distribution service continuation from the radio terminal and transmits information representing whether or not a request for continuation of multicast information distribution service managed by the service continuation managing means is made to the radio terminal.