Method, system, and apparatus of range measurement in a wireless network

Patent metadata

Field	Value
Publication number	US-2016366606-A1
Application number	US-201514736522-A
Country	US
Kind code	A1
Filing date	Jun 11, 2015
Priority date	Jun 11, 2015
Publication date	Dec 15, 2016
Grant date	—

Abstract

An apparatus to transmit a fine timing measurements (FTM) request from a first station to a second station. The FTM request including a request for suspending FTM measurements, if a threshold of movement has not been crossed since a last FTM measurement by the second station. The second station transmits in response to the FTM request a response including a motion indication of the second station.

First claim

What is claimed is:

1 . A apparatus comprising circuitry to cause a first station to:
transmit a fine timing measurements (FTM) request to a second station, the FTM request comprises a request to suspend FTM measurements when a motion threshold has not been crossed since a last FTM measurement by the second station; process a received acknowledgment (ACK) from the second station in response to the FTM request; and process a received FTM frame from the second station, the FTM frame comprising a motion detection field to indicate a motion state of the second station.

2 . The apparatus of claim 1 being configured to cause the first station to:
suspend the FTM measurements when the motion detection field is to indicate a non-motion state of the second station since the last FTM measurement.

3 . The apparatus of claim 1 , wherein the FTM request comprises a motion threshold field, the motion threshold field comprising the motion threshold.

4 . The apparatus of claim 1 , wherein the motion threshold is a distance threshold.

5 . The apparatus of claim 1 , wherein the FTM request comprises a suspend FTM request field, the suspend FTM request field comprises an indication of the request to suspend FTM measurements.

6 . The apparatus of claim 1 being configured to cause the first station to:
determine a motion of the second station at a negotiation stage of the FTM procedure.

7 . The apparatus of claim 1 being configured to cause the first station to:
perform a measurement stage of the FTM procedure when the motion indication indicates that the second station moved since the last FTM measurement.

8 . The apparatus of claim 1 being configured to cause the first station to:
perform a measurement stage of the FTM procedure when the first station is stationary and the second station is moving.

9 . The apparatus of claim 1 being configured to cause the first station to:
perform a measurement stage of the FTM procedure if both the first station and the second station are moving.

10 . The apparatus of claim 1 , wherein the first station is configured to operate as an initiator.

11 . The apparatus of claim 1 comprising:
a system on chip (SoC) circuitry operably coupled to a radio circuitry;
a motion detector operably coupled to the SoC;
a memory operably coupled to the SoC;
an antenna port operably coupled to the radio circuitry; and
at least one antenna operably coupled to the antenna port.

12 . An apparatus comprising circuitry to cause a first station to:
process a received fine timing measurements (FTM) request from a second station, the FTM request comprises a request to suspend FTM measurements when a motion threshold has not been crossed since a last FTM measurement by the first station; send an acknowledgment (ACK) to the second station in response to the FTM request; and send an FTM response frame to the second station, the FTM response frame comprising a motion detection field to indicate a motion state of the first station.

13 . The apparatus of claim 12 being configured to caused the first station to:
suspend the FTM measurements when the motion detection field is to indicate a non-motion state of the second station since the last FTM measurement.

14 . The apparatus of claim 12 , wherein the FTM request comprises a motion threshold field, the motion threshold field comprising the motion threshold.

15 . The apparatus of claim 12 , wherein the motion threshold is a distance threshold.

16 . The apparatus of claim 12 , wherein the FTM request comprises a suspend FTM request field, the suspend FTM request field comprises an indication of the request to suspend FTM measurements.

17 . The apparatus of claim 12 being configured to cause the first station to:
determine a motion of the second station at a negotiation stage of the FTM procedure.

18 . The apparatus of claim 12 being configured to cause the first station to:
perform a measurement stage of the FTM procedure when the first station moves since the last FTM measurement.

19 . The apparatus of claim 12 , wherein the first station is configured to operate as a responder.

20 . The apparatus of claim 12 , wherein the first station comprises a movement detector.

21 . A computer program product comprising one or more tangible computer readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor to result in:
processing a fine timing measurements (FTM) request to be transmitted to a second station, the FTM request comprises a suspend FTM request field and a motion threshold field; processing an acknowledgment (ACK) received from the second station in response to the FTM request; processing a received FTM frame from the second station, the FTM frame comprising a motion detection field to indicate a motion of the second station; and suspending FTM measurements when the motion detection field is to indicate a non-motion state of the second station since the last FTM measurement.

22 . The computer program product of claim 21 , wherein the motion threshold is a distance threshold.

23 . The computer program product of claim 21 , wherein the suspend FTM request field comprises an indication of the request to suspend FTM measurements.

24 . The computer program product of claim 21 , wherein the instructions when executed result in:
determining a motion of the second station at a negation stage of the FTM procedure.

25 . The computer program product of claim 21 , wherein the instructions when executed result in:
performing a measurement stage of the FTM procedure if the second station moved since the last FTM measurement.

Assignees

• Intel Ip Corp

Inventors

• Steiner Itai

Classifications

• G01S5/017

  Detecting state or type of motion · CPC title

• G01S13/765

  with exchange of information between interrogator and responder · CPC title

• H04W24/10 Primary

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title