公开(公告)号：US10660058B2

公开(公告)日：2020-05-19

申请号：US16366063

申请日：2019-03-27

Applicant: MediaTek Inc.

Inventor： Yu-Cheng Huang ,  Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W4/00 ,  H04W60/06 ,  H04W24/10 ,  H04W60/02 ,  H04W76/18 ,  H04L12/66 ,  H04W8/24 ,  H04L12/00 ,  H04W36/00

Abstract: Various solutions for avoiding circuit-switched call drop with respect to user equipment and network apparatus in mobile communications are described. An apparatus transmits a non-access stratum (NAS) message in a NAS signaling connection. The apparatus receives a NAS response message. The apparatus initiates a timer to control the NAS signaling connection. The apparatus further receives a circuit-switched (CS) service notification. The apparatus then stops the timer and execute a CS service procedure.

公开(公告)号：US20190223133A1

公开(公告)日：2019-07-18

申请号：US16366063

申请日：2019-03-27

Applicant: MediaTek Inc.

Inventor： Yu-Cheng Huang ,  Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W60/06 ,  H04W76/18 ,  H04W60/02 ,  H04W24/10

CPC classification number: H04W60/06 ,  H04L12/00 ,  H04L12/66 ,  H04W8/245 ,  H04W24/10 ,  H04W36/0022 ,  H04W60/02 ,  H04W76/18

Abstract: Various solutions for avoiding circuit-switched call drop with respect to user equipment and network apparatus in mobile communications are described. An apparatus transmits a non-access stratum (NAS) message in a NAS signaling connection. The apparatus receives a NAS response message. The apparatus initiates a timer to control the NAS signaling connection. The apparatus further receives a circuit-switched (CS) service notification. The apparatus then stops the timer and execute a CS service procedure.

公开(公告)号：US20180352531A1

公开(公告)日：2018-12-06

申请号：US15913839

申请日：2018-03-06

Applicant: MediaTek Inc.

Inventor： Yu-Cheng Huang ,  Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W60/06 ,  H04W76/18 ,  H04W60/02 ,  H04W24/10

CPC classification number: H04W60/06 ,  H04L12/00 ,  H04L12/66 ,  H04W8/245 ,  H04W24/10 ,  H04W60/02 ,  H04W76/18

Abstract: Various solutions for avoiding circuit-switched call drop with respect to user equipment and network apparatus in mobile communications are described. An apparatus may transmit a non-access stratum (NAS) message in a NAS signaling connection. The apparatus may receive a NAS response message. The apparatus may initiate a timer to control the NAS signaling connection. The apparatus may further receive a circuit-switched (CS) service notification. The apparatus may stop the timer and execute a CS service procedure.

公开(公告)号：US11570616B2

公开(公告)日：2023-01-31

申请号：US17633326

申请日：2020-08-07

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng Huang ,  Chi-Chen Lee ,  Hao-Hsiang Chung ,  Yung-Chun Yang ,  Chien-Chun Huang-Fu

IPC: H04W12/03 ,  H04W76/10 ,  H04W60/04

Abstract: Methods and apparatus are provided for providing UE EPS capability information and receiving non-access stratum (NAS) security algorithm information for an interworking procedure in the 5GS network. In one novel aspect, the UE provides the UE EPS capability information in cleartext before the security mode procedure, and the NAS security algorithm information is included in a security mode command message during the security mode procedure. In one embodiment, the UE EPS capability information is an S1 mode indicator or the 5GMM capability information including the Si mode indicator. In another novel aspect, the network provides the NAS security algorithm information before interworking procedure from 5GS to LTE. In one embodiment, the network provides the NAS security algorithm information in the Registration Accept message. In another embodiment, the network provides the NAS security algorithm information in handover procedure from the 5GS to LTE.

公开(公告)号：US10278153B2

公开(公告)日：2019-04-30

申请号：US15913839

申请日：2018-03-06

Applicant: MediaTek Inc.

Inventor： Yu-Cheng Huang ,  Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W4/00 ,  H04W60/06 ,  H04W24/10 ,  H04W60/02 ,  H04W76/18 ,  H04L12/66 ,  H04W8/24 ,  H04L12/00

Abstract: Various solutions for avoiding circuit-switched call drop with respect to user equipment and network apparatus in mobile communications are described. An apparatus may transmit a non-access stratum (NAS) message in a NAS signaling connection. The apparatus may receive a NAS response message. The apparatus may initiate a timer to control the NAS signaling connection. The apparatus may further receive a circuit-switched (CS) service notification. The apparatus may stop the timer and execute a CS service procedure.

公开(公告)号：US10390384B2

公开(公告)日：2019-08-20

申请号：US15138720

申请日：2016-04-26

Applicant: MediaTek Inc.

Inventor： Yu-Cheng Huang ,  Chien-Chun Huang-Fu ,  Yu-Syuan Jheng ,  Jou-Man Lin

IPC: H04W76/30 ,  H04W76/16 ,  H04W36/00 ,  H04W76/18 ,  H04W76/50 ,  H04W60/00 ,  H04W60/06

Abstract: A mobile communication device including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a first network supporting only Packet-Switched (PS) services or a second network supporting Circuit-Switched (CS) services. The controller receives a rejection message of a Tracking Area Updating (TAU) procedure from the first network via the wireless transceiver when a Circuit Switch Fallback (CSFB)-related call originated from or terminated to the mobile communication device is pending, determines whether the rejection message includes a predetermined rejection cause, and in response to the rejection message including the predetermined rejection cause, selects the second network to make the CSFB-related call via the wireless transceiver without re-attaching to the first network.