# US 10,772,069 B2 · Passive positioning using directional transmissions

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- Number: US 10,772,069 B2
- Document ID: US10772069B2
- Status: Granted
- Kind: B2
- Application number: 15/963,447
- Filed: 2018-04-26
- Published: 2018-11-01
- Granted: 2020-09-08
- Earliest claimed: 2017-04-27
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Assaf Yaakov Kasher; Amitai Abramson; Amichai Sanderovich
- Web page: https://patentgrep.com/patent/US10772069B2

## CPC

- H04W 64/006: {with additional information processing, e.g. for direction or speed determination}
- G01S 5/08: Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
- G01S 5/12: by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
- H04W 4/02: Services making use of location information
- H04W 16/28: using beam steering
- H04W 72/51: based on terminal or device properties
- G01S 3/66: Narrow-beam systems producing in the receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver; Overlapping broad-beam systems defining in the receiver a narrow zone and producing a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver
- G01S 5/10: Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308})
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management
- H04W 84/12: WLAN [Wireless Local Area Networks]
- 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
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Certain aspects of the present disclosure provide methods and apparatus for enhancing a beamforming training procedure.

## Claims

### Claim 1

An apparatus for wireless communications, comprising:
an interface configured to obtain:
a first frame, during a first sector sweep procedure, having an indication of a first direction of transmission of the first frame relative to a position of a first wireless node, and
a second frame, during a second sector sweep procedure, having an indication of a second direction of transmission of the second frame relative to a position of a second wireless node; and
a processing system configured to estimate a position of the apparatus based on the first direction, the second direction, the position of the first wireless node, and the position of the second wireless node,
wherein the estimation is further based on one or more training fields, associated with the first and second frames, obtained during the first and second sector sweep procedures.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein:
the first frame also has an indication of the position of the first wireless node; and
the second frame also has an indication of the position of the second wireless node.

### Claim 3 (depends on 1)

The apparatus of claim 1,
wherein the first and second sector sweep procedures are non-overlapping in time.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the estimation comprises estimating a position of an intersection of:
a first line corresponding to transmission of the first frame from the position of the first wireless node in the first direction; and
a second line corresponding to transmission of the second frame from the position of the second wireless node in the second direction.

### Claim 5 (depends on 4)

The apparatus of claim 4, wherein:
the first and second lines correspond to one or more sectors for the one or more training fields with a predetermined power.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein:
the interface is also configured to obtain a third frame having an indication of a third direction of transmission of the third frame relative to a position of a third wireless node, and
the estimation is also based on the third direction and the position of the third wireless node.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein:
the indication of the first direction and the indication of the second direction are obtained via different frequency bands.

### Claim 8 (depends on 1)

The apparatus of claim 1, further comprising at least one antenna via which the first frame and the second frame are obtained, wherein the apparatus is configured as a wireless device.