说明：  正常的MS发起的软切换“加BTS2”过程 正常的MS发起的软切换“减BTS1”过程 在DROP定时器到时前出现信号变强的情况处理 MS在收到“切换加”的HDM时，相应导频已经移除候选集的情况
(MS-initiated normal soft handover plus BTS2 process MS-initiated normal soft handover Save BTS1 process Signal becomes stronger situation arises when the timer before the DROP treatment When MS switch plus of HDM, the corresponding pilot candidate set of circumstances has been removed)