公开(公告)号：US20240406807A1

公开(公告)日：2024-12-05

申请号：US18444793

申请日：2024-02-19

Applicant: Mediatek Inc.

Inventor： Chun-Li Kuo ,  Kai-Min Liao ,  Cheng-Hsien Chang

IPC: H04W36/00 ,  H04W80/10

Abstract: A method of redialing with user equipment (UE) under handover limitation is disclosed. The method includes establishing a Voice over Wi-Fi (VoWiFi) call between the UE and a network, ending the VoWiFi call by the UE if a signal quality of the VoWiFi call is lower than a first threshold and a quality of another Radio Access Technology (RAT) is higher than a second threshold for calling, and sending a Session Initiation Protocol (SIP) INVITE message with the another RAT, from the UE to the network, to initiate a redialing after ending the VoWiFi call.

公开(公告)号：US20240298233A1

公开(公告)日：2024-09-05

申请号：US18503191

申请日：2023-11-07

Applicant: MEDIATEK INC.

Inventor： Chun-Li Kuo ,  Chun-Shen Sung

IPC: H04W36/08 ,  H04B17/318 ,  H04W36/00

CPC classification number: H04W36/087 ,  H04B17/328 ,  H04W36/00226 ,  H04W36/0058

Abstract: A method for inter-radio access technology (inter-RAT) handover includes establishing New Radio (NR) connection between user equipment (UE) and a network, sending first Measurement Report by the UE to the network when one of following conditions occurs: New Radio (NR) signal quality does not satisfy an NR signal threshold, Real-time Transport Protocol (RTP) measurement does not satisfy an RTP threshold, and the UE changes a calling preference to voice over Wi-Fi (VoWiFi). The method further includes triggering a handover from VoNR to voice over LTE (VoLTE) by the network, and triggering a handover from VoLTE to VoWiFi by the UE.