公开(公告)号：US10142890B2

公开(公告)日：2018-11-27

申请号：US14759159

申请日：2014-01-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ajaykumar Kabadi ,  Kedar Santosh Kumar Aalla ,  Pavan Kumar Devarayanigari ,  Prakash Rao ,  Ravi Krishna Hari Haran Sripada ,  Srinivas Chinthalapudi

IPC: H04W36/00 ,  H04W48/08 ,  H04W48/16 ,  H04W48/18

Abstract: A method and system for minimizing delay in circuit-switched fallback (CSFB) procedure is disclosed. The disclosed method provides two different approaches for optimizing the delay during the CSFB procedure. In the first approach, user equipment (UE) receives a Location Area Identifier (LAI along with the Radio Access Technology (RAT) information from the network (LTE network). The UE uses the received RAT information from the network for switching to the target Radio Access Network (RAN) without informing to the LTE network. In another approach, the UE obtains the RAT information by performing a background scan in idle mode, when the UE receives LAI without RAT information from the network.

公开(公告)号：US11943669B2

公开(公告)日：2024-03-26

申请号：US17392211

申请日：2021-08-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ajaykumar Kabadi ,  Prasad Basavraj Dandra ,  Srinivas Chinthalapudi ,  Raju Udava Siddappa

IPC: H04W36/00 ,  H04L65/1066 ,  H04L65/65 ,  H04W8/18

CPC classification number: H04W36/0011 ,  H04L65/1066 ,  H04L65/65 ,  H04W8/18

Abstract: According to a method of preventing call drop in voice communication network, a session is established for voice call initiated between a first terminal and a second terminal. The method includes receiving a first indication that the first terminal is entering a low-signal area. Further, the method includes disabling one or more media inactivity timers for retaining the session. Furthermore, the method includes storing one or more network parameters when one of the session is retained or when the session is released. Thereafter, the method includes receiving a second indication that the first terminal has exited the low-signal area. The voice call is resumed on the session based on the stored network parameters, when the session is retained upon enabling the respective one or more media inactivity timers. The voice call is re-initiated on a new session, based on the stored network parameters when the session is released.