公开(公告)号：US20180262960A1

公开(公告)日：2018-09-13

申请号：US15453657

申请日：2017-03-08

Applicant: QUALCOMM Incorporated

Inventor： Pankaj BANSAL ,  Hardeepsinh JADEJA ,  Akash SRIVASTAVA ,  Ajit GUPTA ,  Manjunatha Subbamma ANANDA

IPC: H04W36/08 ,  H04W36/36

CPC classification number: H04W36/08 ,  H04W36/36 ,  H04W48/00

Abstract: Aspects of the present disclosure relate to wireless communications and, more particularly, to recovery from a loss of service in wireless networks. An example method generally includes: in response to a loss of service from a cell of a first radio access technology (RAT) associated with a VPLMN, attempting to camp on a first cell, receiving, from the first cell, a rejection of the camping attempt indicating roaming is not allowed, based on receiving the rejection indicating roaming is not allowed, searching at least one of an home public land mobile network (HPLMN) or registered public land mobile network (RPLMN) for one or more second cells of the first RAT, wherein searching includes refraining from searching at least one other RATs of the HPLMN, and if at least one second cell is detected, attempting to camp on the at least one second cell.

公开(公告)号：US20190150042A1

公开(公告)日：2019-05-16

申请号：US16184639

申请日：2018-11-08

Applicant: QUALCOMM Incorporated

Inventor： Ankur SRIVASTAVA ,  Kishore Kumar YANNAKULA ,  Suresh SANKA ,  Ajit GUPTA ,  Bhanu Kiran JANGA

IPC: H04W36/08 ,  H04W36/36 ,  H04W36/12 ,  H04W36/00

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive a priority list associated with preferred radio frequencies from a serving base station. In certain aspects, each radio frequency of the preferred radio frequencies associated with a first set of base station may operate on a first RAT. In certain other aspects, the apparatus may determine if the UE is able to reselect to the first RAT. In certain other aspects, the apparatus may perform a rank-based cell reselection procedure based on signal strength when the UE is unable to reselect to the first RAT.

公开(公告)号：US20170111512A1

公开(公告)日：2017-04-20

申请号：US15270624

申请日：2016-09-20

Applicant: QUALCOMM Incorporated

Inventor： Harish REDDY KOTHAKAPU ,  Bhanu Kiran JANGA ,  Ajit GUPTA ,  Venkatesh Savithri MAHESH ,  Guatam Kumar GUPTA ,  Raju KASARAMONI

IPC: H04M7/00 ,  H04W76/02 ,  H04L29/06

CPC classification number: H04W76/16 ,  H04L65/1016 ,  H04L65/1069 ,  H04W48/18

Abstract: Aspects of the present disclosure provide an apparatus and techniques for wireless communication by a user equipment (UE), such as placing a video telephony (VT) call when a user equipment (UE) is camped on a non-Internet Protocol Multimedia Subsystem (IMS) network, such as a non-IMS Long Term Evolution (LTE) network. The UE may be in a coverage area of a first radio access technology (RAT) supported by a first standard, and in a coverage area of a second RAT supported by a second standard. The UE may determine the LTE network does not support IMS services. In response to the determination, the UE may take one or more actions to place a VT call using the second RAT which supports IMS services.