公开(公告)号：US20170357005A1

公开(公告)日：2017-12-14

申请号：US15275299

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Jonathan M. Diamond ,  Glenn Donald MacGougan ,  Kumar Gaurav Chhokra ,  Robert Mayor ,  Yishuang Geng

IPC: G01S19/10 ,  G01S19/42 ,  G01S19/21

CPC classification number: G01S19/21 ,  G01S19/05 ,  G01S19/22 ,  G01S19/34 ,  G01S19/39 ,  G01S19/45

Abstract: Techniques for improving positioning performance using categorization of navigation signal environment are described. A mobile device can receive signal environment data. The signal environment data can represent multiple geographic areas. The signal environment data includes a respective signal environment category for each geographic area, each signal environment category corresponding to a degree to which geographic features in the respective geographic area affect reception of the navigation signals. The mobile device can determine that the mobile device is located in a particular geographic area represented in the signal environment data. The mobile device can then select a set of one or more rules for aiding location estimation. The set of one or more rules can correspond to the signal environment category of the geographic area. The mobile device can estimate a location of the mobile device using the navigation signals and under the set of one more rules.