公开(公告)号：US20170215166A1

公开(公告)日：2017-07-27

申请号：US15211999

申请日：2016-07-15

Applicant: GOOGLE INC.

Inventor： Gil Disatnik ,  Sagi Hed

IPC: H04W64/00 ,  G01S5/02

CPC classification number: H04W64/006 ,  G01S5/0242 ,  G01S5/0252 ,  G01S5/14 ,  H04B7/18515 ,  H04B7/18554 ,  H04W64/003 ,  H04W84/12

Abstract: In a geographic area with limited satellite coverage, multiple signal sources are statically disposed along a path through the geographic area. To automatically determine geographic positions of the signal sources, signal data collected by a receiver moving along the path is received, where the signal data indicates changes, over a period of time, in strength of respective signals emitted by the signal sources. Indications of a first position of the receiver at a first time prior to entering the geographic area and a second position of the receiver at a second time subsequent to leaving the geographic area are received, and positions for the signal sources are determined using the received signal data and the received indications of the positions and the times. The determined positions for the signal sources are used to geoposition a device moving along the path.

公开(公告)号：US11463983B2

公开(公告)日：2022-10-04

申请号：US15211999

申请日：2016-07-15

Applicant: GOOGLE INC.

Inventor： Gil Disatnik ,  Sagi Hed

IPC: H04W64/00 ,  G01S5/02 ,  G01S5/14 ,  H04B7/185 ,  H04W84/12

Abstract: In a geographic area with limited satellite coverage, multiple signal sources are statically disposed along a path through the geographic area. To automatically determine geographic positions of the signal sources, signal data collected by a receiver moving along the path is received, where the signal data indicates changes, over a period of time, in strength of respective signals emitted by the signal sources. Indications of a first position of the receiver at a first time prior to entering the geographic area and a second position of the receiver at a second time subsequent to leaving the geographic area are received, and positions for the signal sources are determined using the received signal data and the received indications of the positions and the times. The determined positions for the signal sources are used to geoposition a device moving along the path.

公开(公告)号：US10292127B2

公开(公告)日：2019-05-14

申请号：US15415540

申请日：2017-01-25

Applicant: GOOGLE INC.

Inventor： Gil Disatnik

IPC: H04W64/00 ,  G01S5/02 ,  G01S5/14 ,  H04B7/185 ,  H04W84/12

Abstract: In a system for geopositioning receivers in areas substantially inaccessible to satellite signals, multiple access points configured to periodically transmit management frames (i) via a single shared communication channel and (ii) using a modulation scheme associated with a rate of at least 50 Mbps. A database stores respective locations for each of the access points. A portable computing device is configured to retrieve the location of the access points from the database and, when moving through a region in which the of access points are disposed, receive at least one management frame from each of the access points within a limited time interval on the single shared communication channel. The portable computing device is further configured to determine a current position of the portable computing device based on the management frames using the retrieved locations of the access points.

公开(公告)号：US20170215164A1

公开(公告)日：2017-07-27

申请号：US15415540

申请日：2017-01-25

Applicant: GOOGLE INC.

Inventor： Gil Disatnik

IPC: H04W64/00 ,  G01S5/14 ,  H04B7/185

CPC classification number: H04W64/006 ,  G01S5/0242 ,  G01S5/0252 ,  G01S5/14 ,  H04B7/18515 ,  H04B7/18554 ,  H04W64/003 ,  H04W84/12

Abstract: In a system for geopositioning receivers in areas substantially inaccessible to satellite signals, multiple access points configured to periodically transmit management frames (i) via a single shared communication channel and (ii) using a modulation scheme associated with a rate of at least 50 Mbps. A database stores respective locations for each of the access points. A portable computing device is configured to retrieve the location of the access points from the database and, when moving through a region in which the of access points are disposed, receive at least one management frame from each of the access points within a limited time interval on the single shared communication channel. The portable computing device is further configured to determine a current position of the portable computing device based on the management frames using the retrieved locations of the access points.