公开(公告)号：US20170257800A1

公开(公告)日：2017-09-07

申请号：US14910903

申请日：2015-10-28

Applicant: MEDIATEK INC.

Inventor： Chi-Chen LEE ,  Songsong JIA ,  Shaojun LUO

IPC: H04W36/00 ,  H04W72/10 ,  H04W76/06

CPC classification number: H04W36/0022 ,  H04W60/04 ,  H04W72/10 ,  H04W76/18 ,  H04W76/30

Abstract: A user equipment and a circuit-switched fallback method thereof are provided. An initial base station sends a radio resource control connection release message containing the redirection frequency list to the UE. The redirection frequency list includes at least one redirection frequency. The UE determines a priority of the at least one redirection frequency according to a current registered LAI, a learning database and a piece of signal reference information of the redirection frequency list. Accordingly, the UE executes a circuit switch fallback procedure according to the priority of the at least one redirection frequency.