METHOD FOR SUPPLYING A MULTIMEDIA BROADCAST/MULTICAST SERVICE IN A MOBILE COMMUNICATION SYSTEM, CONCERNED WITH PERFORMING A NORMAL MULTIMEDIA BROADCAST/MULTICAST SERVICE REGARDLESS OF STATES OF USER EQUIPMENTS

摘要

PURPOSE: A method for supplying an MBMS(Multimedia Broadcast/Multicast Service) in a mobile communication system is provided to enable an RNC to perceive MBMS states of UEs(User Equipments). CONSTITUTION: A UE(10) sets up an RRC(Radio Resource Control) connection(101), and transmits a service registration message to an SGSN(40)(102). The SGSN(40) registers the UE(10) in an MBMS context(103), and transmits an activate MBMS context response message to the UE(10)(104). The SGSN(40) transmits an MBMS UE attach request message to a CRNC and an SRNC(20,30). The SRNC(30) registers the UE(10) in an MBMS context(106), and transmits an MBMS attach request message to the CRNC(20)(107). The CRNC(20) registers the UE(10) in an MBMS context(108), and transmits an MBMS attach response message(109). The SRNC(30) transmits an MBMS UE attach response message(110). The CRNC(20) transmits an MBMS attach request message to the SGSN(40)(111).