公开(公告)号：US11483677B2

公开(公告)日：2022-10-25

申请号：US16972998

申请日：2018-06-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiqing Fang ,  Hsienyang Lu ,  Donghao Zhang ,  Yankun Luo ,  Zhongyan Chai ,  Chen Liu ,  Jie Ma

IPC: H04W4/029 ,  G01S19/01 ,  H04L67/52 ,  H04L67/55

Abstract: A method for tracking a terminal device having a cellular modem and a positioning module is disclosed. The method comprises monitoring a location of a terminal device through a cellular network using the cellular modem of the terminal device, while the positioning module of the terminal device is disabled; determining that the terminal device enters a first cell of the cellular network based on signals from the cellular modem; enabling the positioning module of the terminal device in response to the determination that the terminal device enters the first cell; and obtaining from the positioning module a first geographical location of the terminal device in the first cell.