# US 10,771,935 B2 · Device locating using angle of arrival measurements

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- Number: US 10,771,935 B2
- Document ID: US10771935B2
- Status: Granted
- Kind: B2
- Application number: 16/285,966
- Filed: 2019-02-26
- Published: 2019-06-27
- Granted: 2020-09-08
- Earliest claimed: 2017-09-29
- Assignees: ABL IP Holding LLC
- Applicants: Abl IP Holding LLC
- Inventors: Mitri J. Abou-Rizk; Sajin George
- Web page: https://patentgrep.com/patent/US10771935B2

## CPC

- H04W 4/33: for indoor environments, e.g. buildings
- G01S 1/0426: {Collocated with electrical equipment other than beacons }
- G01S 1/7034: {Mounting or deployment thereof}
- G01S 5/0242: {Determining the position of transmitters to be subsequently used in positioning (G01S5/0289 takes precedence)}
- G01S 5/0289: {of multiple transceivers, e.g. in ad hoc networks}
- G01S 5/04: Position of source determined by a plurality of spaced direction-finders
- G01S 5/06: Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements (G01S5/12 takes precedence)
- G01S 5/08: Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
- H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds}
- H04W 4/30: Services specially adapted for particular environments, situations or purposes
- H05B 47/199: {Commissioning of light sources}
- G01S 2205/01: specially adapted for specific applications
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

The disclosure provides examples of systems and methods for determining locations of a number of radio frequency-enabled devices such as mobile devices and radio frequency-equipped beacons/luminaires within an indoor location. The radio frequency-enabled devices may be part of an indoor positioning system and/or content delivery system. The examples describe obtaining an angle of arrival (AoA) of the signals received by the respective radio frequency-enabled devices. The AOA data is used to identify the relative positions of the radio frequency-enabled devices as the mobile device moves about the indoor location. Upon comparing AOA measurements of the collected data related to a map of the location, the system may generate a data structure that may be presented graphically as a map of positions of the devices at the location. The described examples may enable a rapid commissioning process with respect to the radio frequency-enabled devices in a network.

## Claims

### Claim 1

A system, comprising:
a plurality of radio frequency-enabled devices within an indoor location, each of the plurality of radio frequency-enabled devices configured to communicate in a network;
a server coupled to the plurality of radio frequency-enabled devices, the server configured to receive from each radio frequency-enabled device of the plurality of radio frequency-enabled devices position determination information and identifying information related to each of the plurality of radio frequency-enabled devices; and
a data storage coupled to the server, the data storage configured to store the received position determination information and the identifying information related to each of the plurality of radio frequency-enabled devices;
wherein each respective radio frequency-enabled device of the plurality of radio frequency-enabled devices includes:
a processor,
a radio frequency transceiver and
a memory, wherein the memory and the radio frequency transceiver are coupled to the processor, and the memory stores programming code executable by the processor,
wherein the processor, upon executing the stored programming code, being configured to:
upon receiving a signal from another radio frequency-enabled device of the plurality of radio frequency-enabled devices, obtain an angle of arrival indication of the received signal;
obtain position determination information of the other radio frequency device from the received signal, the position determination information including information related to a height of the other radio frequency device;
based on the obtained angle of arrival indication and the position determination information, generate position related information of the respective radio frequency-enabled device; and
forward to the server a message including a radio frequency-enabled device identifier of the respective radio frequency-enabled device and the position related information of the respective radio frequency-enabled device within the indoor location.

### Claim 2 (depends on 1)

The system of claim 1, wherein the processor of each of the plurality of radio frequency-enabled devices is further configured to:
determine a distance from the radio frequency-enabled device to the other radio frequency-enabled based on the obtained angle of arrival indication of the received signal and the height of the radio frequency device above a floor of the indoor location; and
encode the determined distance and the obtained angle of arrival as position-related information into the message forwarded to the server.

### Claim 3 (depends on 1)

The system of claim 1, wherein the server is further configured to:
use the position related information included in the forwarded message to determine a calculated position of the respective radio frequency-enabled device in relation to the other radio frequency-enabled devices of the plurality of radio frequency-enabled devices.

### Claim 4 (depends on 1)

The system of claim 1, wherein, for each radio frequency-enabled device of the plurality of radio frequency-enabled devices, the server is further configured to:
receive a respective message including position-related information from each respective radio frequency-enabled device of the plurality of radio frequency-enabled devices; and
upon receipt of the respective message from each respective radio frequency-enabled device of the plurality of radio frequency-enabled devices, determine a location of each respective radio frequency-enabled device of the plurality of the radio frequency-enabled devices relative to one another.

### Claim 5 (depends on 4)

The system of claim 4, wherein the server is further configured to:
using the determined location of each of the plurality of the radio frequency-enabled devices relative to one another, populate a data structure including the determined location of each of the plurality of radio frequency-enabled devices.

### Claim 6 (depends on 5)

The system of claim 5, wherein the server is further configured to:
using the data structure, generate a location map of the plurality of radio frequency-enabled devices showing the locations of each of the plurality of the radio frequency-enabled devices in the indoor location; and
store the generated location map and an indoor location identifier in the data storage for distribution to another mobile device, an indoor position service or a remote computing device.

### Claim 7 (depends on 1)

The system of claim 1, wherein the another radio frequency-enabled device is a mobile device, the mobile device including a radio frequency transceiver, a processor and a memory, the mobile device configured to:
determine a location of the mobile device in the indoor location; and
transmit, via the mobile device radio frequency transceiver, a broadcast message encoded with information related to the determined location of the mobile device.

### Claim 8 (depends on 7)

The system of claim 7, wherein the position-related information includes the determined angle of arrival indication and the position determination information of the mobile device within the indoor location.

### Claim 9 (depends on 7)

The system of claim 7, wherein the position determination information of the mobile device includes coordinates of the mobile device within the indoor location.

### Claim 10 (depends on 7)

The system of claim 7, wherein the position determination information of the mobile device includes a landmark location within the indoor location at about which the mobile device is positioned.

### Claim 11 (depends on 1)

The system of claim 1, wherein:
at least one of the plurality of radio frequency-enabled devices is further configured as a luminaire and includes a light source; and
an operation of the light source is controlled by an associated processor of the at least one of the plurality of radio frequency-enabled devices in the network.