DEVICE AND A METHOD FOR DETERMINING A SOFT HANDOVER IN A CODE DIVISION MULTIPLE ACCESS MOBILE COMMUNICATION SYSTEM FOR SUPPLYING A MULTIMEDIA BROADCAST/MULTICAST SERVICE, ESPECIALLY CORRELATED TO SUPPLYING THE SOFT HANDOVER TO A MOBILE TERMINAL WHEN THE MOBILE TERMINAL MOVES TO A DATA RECEIVABLE AREA FROM PLURAL BASE STATIONS

摘要

Purpose a: device and a kind of method, for determining the soft handover in the CDMA mobile communication system for providing a MBMS (multimedia broadcast/multicast service) is arranged to enable a mobile terminal to whether self-determination has received data from the MBMS of multiple base stations controller to be soft combination, one stable MBMS is provided, even if a MBMS user is moved to a new unit, thus the convenience of cumulative user. Construction: a searchers receives CPICH (common pilot channel) value of multiple signals, measures CPICH RSCP (received signal code power) values or CPICH Ec/ void values (701). One controller between first and second measured value a relative difference compared with a scheduled hysteresis value (702), decide whether difference be included in for regular hour (703) a series of hysteresis values. If in this way, dedicated pilot (channel) estimator receives a despreading dedicated pilot transmission channel signal, measurement is used for a RSCP values or an Ec/ void value of dedicated pilot transmission channel signal (704), then decides whether that the size of measured value is included in the range of scheduled hysteresis value (705). If so, a combiner executes a large amount of soft-combine group method for being used for MBMS data signals (706).