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公开(公告)号：US20180149754A1
公开(公告)日：2018-05-31
申请号：US15576880
申请日：2015-06-04
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenxi LU , Shuiping LONG
IPC: G01S19/00
Abstract: A method includes: obtaining an azimuth and a signal parameter value of each preset satellite of M preset satellites when a mobile terminal is at a first location. The M preset satellites are sorted according to the values of their azimuths and N satellite combinations are obtained from those satellites that are consecutively arranged and have signal parameter values less than preset values. In response to determining that a ratio of the quantity of the preset satellites in the first satellite combination to M is less than a first threshold, the positioning mode of the mobile terminal is set to an outdoor positioning mode. In response to determining that a ratio of the quantity of the preset satellites in the first satellite combination to M is greater than a second threshold, the positioning mode is set to an indoor positioning mode.
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公开(公告)号：US20180239027A1
公开(公告)日：2018-08-23
申请号：US15764263
申请日：2015-11-10
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenxi LU , Yuanfeng CHEN , Li KANG
Abstract: A positioning method and apparatus for a mobile terminal, and a mobile terminal. After a first time period elapses, a main processor obtains M pieces of reliable navigation data from N pieces of buffered navigation data of the mobile terminal, and obtains K pieces of buffered position change data of the mobile terminal. The main processor combines the M pieces of reliable navigation data and the K pieces of position change data, to obtain position information of the mobile terminal in the first time period. The N pieces of navigation data are obtained through calculation by using a satellite navigation signal of the mobile terminal that is received during the first time period. The K pieces of position change data are obtained through calculation by using data that is obtained through monitoring by a sensor of the mobile terminal during the first time period.
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公开(公告)号：US20200092806A1
公开(公告)日：2020-03-19
申请号：US16472896
申请日：2017-03-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenxi LU , Liyao ZHANG
Abstract: A data synchronization method includes: receiving time interval information sent by a second terminal device, where the time interval information includes a synchronization start time and a synchronization end time; obtaining, in stored waking and sleep time information, a time period set that is greater than or equal to the synchronization start time and that is less than or equal to the synchronization end time, where the time period set includes at least one sleep time period; determining, in the time period set, a sleep time period whose sleep duration is greater than a preset threshold; and sending, to the second terminal device, feature data collected in the determined sleep time period.
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公开(公告)号：US20180283873A1
公开(公告)日：2018-10-04
申请号：US15763749
申请日：2015-09-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenxi LU
Abstract: An example calibration method based on a dead reckoning technology is applied to a portable electronic device. The method includes: determining, by the portable electronic device according to the dead reckoning technology, coordinates of a current position, a track parameter value at the current position, and a motion direction at the current position, where the track parameter value includes at least one of a curvature change rate, a curvature radius change rate, a curvature, or a curvature radius; in response to determining that the motion direction is from a first calibration point to a second calibration point, obtaining coordinates of the second calibration point; and in response to determining that the track parameter value at the current position meets a preset calibration condition, correcting the coordinates of the current position to the coordinates of the second calibration point.
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