FCS has been proposed for HSDPA. With FCS, only one cell is selected by UE to provide UE with HS-DSCH service at any time, but UE can update the cell selection once every 3.33ms and change serving cell rapidly.

• HSDPA采用FCS；在某个时刻只允许一个小区向UE提供HS-DSCH服务；但允许UE最快每3.；33ms更新一次服务小区选择；并支持服务小区的HS-DSCH快速切换。