公开(公告)号：US10656237B2

公开(公告)日：2020-05-19

申请号：US16169526

申请日：2018-10-24

Applicant: QUALCOMM Incorporated

Inventor： Milind Patil ,  Aditya Narain Srivastava

IPC: G01S5/02 ,  H04B17/27 ,  H04W64/00 ,  H04B17/364 ,  H04W4/02 ,  H04W76/11

Abstract: A mobile wireless transmitter is detected from location data received for a plurality of wireless transmitters obtained through crowdsourcing or wardriving. Location data is held until sufficient time or enough location data is collected from which movement of a wireless transmitter can be detected. Sets of measurement data for each wireless transmitter are determined from the collected location data. The sets of measurement data may include, e.g., Service Set Identifier (SSID), a round trip time (RTT) variance, and/or a neighbor relationship graph for each wireless transmitter. The mobile wireless transmitter is identified from the sets of measurement data. An almanac database may then be published in which any mobile wireless transmitters are identified or excluded.

公开(公告)号：US09686767B2

公开(公告)日：2017-06-20

申请号：US15076354

申请日：2016-03-21

Applicant: QUALCOMM Incorporated

Inventor： James Douglass Deloach ,  Gaurav Lamba ,  Milind Patil ,  Bruce Everett Wilson

IPC: H04M3/42 ,  H04W64/00 ,  H04M1/725 ,  G01C21/36 ,  G01C21/34 ,  H04W88/02

CPC classification number: H04W64/00 ,  G01C21/206 ,  G01C21/3453 ,  G01C21/3667 ,  H04M1/72572 ,  H04W88/02

Abstract: Methods, systems, computer-readable media, and apparatuses for determining location are presented. One example method includes obtaining a route comprising an ordered set of waypoints; receiving an indication of traversal of the route beginning at a first waypoint and recording a time associated with the indication; determining location information and time information at a sampling rate; for each subsequent waypoint of the ordered set of waypoints: receiving a signal indicating arrival at a current waypoint of the ordered set of waypoints, determining a time and a ground truth associated with the signal, and determining error information associated with each determined location between the prior waypoint and the current waypoint; and providing the error information to a remote device.