Methods, program products, and systems of location estimation using a probability density function are disclosed. In general, in one aspect, a server can estimate an effective altitude of a wireless access gateway using harvested data. The server can harvest location data from multiple mobile devices. The harvested data can include a location of each mobile device and an identifier of a wireless access gateway that is located within a communication range of the mobile device. The server can calculate an effective altitude of the wireless access gateway using a probability density function of the harvested data. The probability density function can be a sufficient statistic of the received set of location coordinates for calculating an effective altitude of the wireless access gateway. The server can send the effective altitude of the wireless access gateway to other mobile devices for estimating altitudes of the other mobile devices.

Claims

20 · 3 independent · depth 3

20 granted claims

›1.independentA method comprising:nreceiving, by one or more computers and from a plurality of mobile devices, harvested data about a wireless access gateway, the h…+7

›2.↳ 1The method of claim 1, wherein the wireless access gateway is a wireless access point, a cellular tower, or a Bluetoothâ„¢ device.d2

›3.↳ 1The method of claim 1, wherein:nthe first difference between the latitude coordinates is given a first weight in the function,the second difference be…d2

›4.↳ 1The method of claim 1, comprising, upon designating the wireless access gateway as a moving wireless access gateway:ndetermining a time of movement of…d2+1

›6.↳ 1The method of claim 1, comprising, upon designating the wireless access gateway as a moving wireless access gateway:ndetermining a first time of movem…d2

›7.↳ 1The method of claim 1, wherein:neach location is further represented using a respective altitude coordinate, andthe function further weights a third d…d2+1

›9.independentA system comprising:none or more computers; anda non-transitory computer-readable medium storing instructions that, when executed by the one or more c…+7

›10.↳ 9The system of claim 9, wherein the wireless access gateway is a wireless access point, a cellular tower, or a Bluetoothâ„¢ device.d2

›11.↳ 9The system of claim 9, wherein:nthe first difference between the latitude coordinates is given a first weight in the function,the second difference be…d2

›12.↳ 9The system of claim 9, the operations comprising, upon designating the wireless access gateway as a moving wireless access gateway:ndetermining a time…d2+1

›14.↳ 9The system of claim 9, the operations comprising, upon designating the wireless access gateway as a moving wireless access gateway:ndetermining a firs…d2

›15.↳ 9The system of claim 9, wherein:neach location is further represented using a respective altitude coordinate, andthe function further weights a third d…d2+1

›17.independentA non-transitory computer-readable medium storing instructions that, when executed by one or more computers, cause the one or more computers to perfor…+3

Classifications

6 codes

IPC · International Patent Classification

Section G — Physics

G01S5/00
G01S5/02
G01C5/00

Section H — Electricity

H04W24/00
H04W4/02
H04W64/00

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File wrapper

Pendency

1.4 y

526 days filing → grant

Office actions

none on record

Responses

2 RCE

Examiner

Nathan Taylor

art unit 2643 · TC 2600

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Citations: 25 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20140364144 A1	11 Dec 2014

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