Handoff英译是用手推开某人，在计算机领域是CDMA术语，表示
切换的意思。
Handoff: transfer a call or data session from one channel to another, or from one BS to another, or from one MSC to another.
Hard handover: the process needs to drop the call for a short time, e.g., GSM handover
Soft handover: MS simultaneously use multiple BS, no need to drop the call when adding new BS, e.g., CDMA system
Handoff 又称为 Handover (HO) 是所有蜂窝通信系统共有的特征。根据切换类型可以分为，硬切换，软切换，更软切换等。 硬切换用于GSM网络，软切换是CDMA 网络的特征之一。