Method and apparatus to expedite CSFB call setup time using intelligent search algorithm

A communication device and a method for circuit switched fallback (CSFB) configured to conduct inter radio access technology (RAT) measurements upon receipt of a CSFB notification and later use the information obtained from the measurements to intelligently conduct a cell selection procedure if redirection to the target RAT frequency indicated by the Evolved Universal Terrestrial Radio Access Network (EUTRAN) in a CSFB redirection request fails. 本文公开了使用智能搜索算法来加快CSFB呼叫建立时间的方法和装置。用于电路交换回退(CSFB)的通信设备和方法被配置为在接收到CSFB通知时进行无线电接入技术(RAT)间测量，并且随后如果到由CSFB重定向请求中的演进型通用陆地无线电接入网(EUTRAN)指示的目标RAT频率的重定向失败，则使用从测量获得的信息来智能地进行小区选择过程。