公开(公告)号：US20190045404A1

公开(公告)日：2019-02-07

申请号：US16053799

申请日：2018-08-03

Applicant: MEDIATEK INC.

Inventor： Chun-Fan Tsai ,  Yih-Shen Chen

IPC: H04W36/00 ,  H04W76/16 ,  H04W88/06 ,  H04W24/10 ,  H04W76/19

Abstract: A method of supporting fast dual connectivity (DC) configuration after fallback in a 4G/5G network is proposed. A UE is configured with MR-DC (Multi-RAT Dual Connectivity) and is connected to both LTE/NR RAT in LTE/NR serving cells of master cell group (MCG) and secondary cell group (SCG). The UE has to fall back to legacy 2G/3G RAT and is forced to release the DC configuration. The UE records the serving cell information before fallback procedure and sends assistant information of the DC configuration to the network after fallback procedure. The assistant information comprises the stored serving cell information and optional additional measurement results for candidate SCG cells. The assistant information allows the network to resume the highspeed data transmission soon after the fallback procedure.

公开(公告)号：US10117135B2

公开(公告)日：2018-10-30

申请号：US14862612

申请日：2015-09-23

Applicant: MediaTek Inc.

Inventor： Chun-Fan Tsai

IPC: H04W36/00 ,  H04W76/18 ,  H04W48/16

Abstract: A mobile communication device including a Baseband processor is provided. The Baseband processor is configured to determine whether the mobile communication device is operating in an idle mode or a connected mode with a first service network in response to starting a Circuit Switch Fallback (CSFB) call, search for a cell of a second service network on a frequency, on which the mobile communication device has previously made another CSFB call successfully from the first service network, when the mobile communication device is operating in the idle mode with the serving cell, and make the CSFB call on the cell.