# US 10,455,357 B2 · Detecting location within a network

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- Number: US 10,455,357 B2
- Document ID: US10455357B2
- Status: Granted
- Kind: B2
- Application number: 15/674,328
- Filed: 2017-08-10
- Published: 2017-12-21
- Granted: 2019-10-22
- Earliest claimed: 2015-09-16
- Assignees: Ivani, LLC
- Applicants: Ivani, LLC
- Inventors: John Wootton; Matthew Wootton; Chris Nissman; Victoria Preston; Jonathan Clark; Justin McKinney; Claire Barnes; Xinyu Xiao; Zhecan Wang
- Web page: https://patentgrep.com/patent/US10455357B2

## CPC

- H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds}
- G01V 3/12: operating with electromagnetic waves {(operating with millimetre waves G01V8/005)}
- G11C 11/2257: {Word-line or row circuits}
- G11C 11/2259: {Cell access}
- G11C 11/2273: {Reading or sensing circuits or methods}
- G11C 11/2293: {Timing circuits or methods}
- G11C 11/2297: {Power supply circuits}
- H04B 17/27: for locating or positioning the transmitter
- H04B 17/318: Received signal strength
- H04L 1/0018: {based on latency requirement}
- H04L 5/006: {Quality of the received signal, e.g. BER, SNR, water filling}
- H04W 4/30: Services specially adapted for particular environments, situations or purposes
- H04W 4/33: for indoor environments, e.g. buildings
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management
- G01V 1/001: {Acoustic presence detection}
- G11C 11/221: {using ferroelectric capacitors}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02)
- G11C: STATIC STORES (semiconductor memory devices H10B)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Systems and methods for detecting the presence of a body in a network without fiducial elements, using signal absorption, and signal forward and reflected backscatter of radio frequency (RF) waves caused by the presence of a biological mass in a communications network.

## Claims

### Claim 1

A method for estimating the number of humans in a space comprising:
providing a plurality of transceivers in wireless communication with each other and disposed in a detection area;
providing a computer server in communication with each transceiver in said plurality of transceivers;
determining, at said computer server, a first signal profile for characteristics of wireless communications among said plurality of transceivers when no humans are present in said detection area;
determining, at said computer server, a second signal profile for characteristics of wireless communications among said plurality of transceivers when a first plurality of humans is present in said detection area, the number of humans in said first plurality being known;
determining, at said computer server, a third signal profile for characteristics of wireless communications among said plurality of transceivers when a second plurality of humans is present in said detection area, the number of humans in said second plurality being unknown; and
using said first signal profile, said second signal profile, and said known number of humans in said first plurality of humans, estimating said unknown number of humans in said second plurality of humans.

### Claim 2 (depends on 1)

The method of claim 1 where said estimate is time stamped and recorded periodically.

### Claim 3 (depends on 1)

The method of claim 1 where said estimate is provided to a requesting party.

### Claim 4 (depends on 3)

The method of claim 3 wherein said requesting party comprises first responders to an emergency at said space.

### Claim 5 (depends on 3)

The method of claim 3 wherein said requesting party comprises a robot.

### Claim 6 (depends on 1)

The method of claim 1 wherein said signal characteristics are selected from the group consisting of: received signal strength, latency, and bit error rate.

### Claim 7 (depends on 1)

The method of claim 1 wherein said estimate is updated by new information from said plurality of transceivers periodically.

### Claim 8 (depends on 1)

The method of claim 1, further comprising indicating when one of said transceivers is no longer transmitting.

### Claim 9 (depends on 1)

The method of claim 1, further comprising providing information received at said computer server from other sensors in said detection area and information from one or more sensors disposed external said detection area.

### Claim 10 (depends on 1)

The method of claim 1, wherein estimating said unknown number of humans in said said plurality of humans comprises comparing signal distortion in said third single profile to signal distortion in said first signal profile and signal distortion in said second signal.