Mobile station use of round trip time measurements

• US 9,247,446 B2
• Filed: 08/10/2015
• Issued: 01/26/2016
• Est. Priority Date: 04/30/2010
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Das, Saumitra Mohan, Aggarwal, Alok, Naguib, Ayman Fawzy, Hardie, Edward Thomas Lingham
• Primary Examiner(s): Gonzalez, Amancio
• Application Number:
  US14/822,441
• Publication Number:
  US 20150350946A1
• Time in Patent Office: 169 Days
• Field of Search: 455/41.2, 455/456.1
• US Class Current: 1/1
• CPC Class Codes: G01S 13/46 Indirect determination of position data
• CPC Class Codes: G01S 13/82 wherein continuous-type signals are transmitted
• CPC Class Codes: G01S 2013/466 by Trilateration, i.e. two antennas or two sensors determine separately the distance to a target, whereby with the knowledge of the baseline length, i.e. the distance between the antennas or sensors, the position data of the target is determined
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

Techniques are provided in which a mobile station may determine a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device; Determine a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and determine, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.

Claims

1. A mobile station, comprising:

a transceiver; and

a processing unit configured to;

determine a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device;

determine a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and

determine, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.

2. The mobile device of claim 1, wherein the processing unit is configured to determine, at least in part, the position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT, by:

initiating transmission, via the transceiver, of the first RTT and the second RTT to another device; and

in response, receiving from the another device, via the transceiver, the position of the mobile device.

3. The mobile device of claim 1, wherein the processing unit is further configured to:

determine a received signal strength measurement for at least one signal received via the transceiver from at least transmitting device; and

determine, at least in part, the position of the mobile station further based, at least in part, on the received signal strength.

4. The mobile station of claim 1, wherein at least one of the first network device or the second network device is part of a short-range wireless network.

5. The mobile station of claim 1, wherein the transceiver supports an 802.11 transmission band.

6. An apparatus for use in a mobile station, the apparatus comprising:

means for determining a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device;

means for determining a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and

means for determining, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.

7. The apparatus of claim 6, wherein the means for determining, at least in part, the position of the mobile station further comprise:

means for sending the first RTT and the second RTT to another device; and

means for receiving, in response from the another device, the position of the mobile device.

8. The apparatus of claim 6, and further comprising:

means for determining a received signal strength measurement for at least one signal received via the transceiver from at least transmitting device; and

means for determining, at least in part, the position of the mobile station further based, at least in part, on the received signal strength.

9. The apparatus of claim 6, wherein at least one of the first network device or the second network device is part of a short-range wireless network.

10. A method for use in a mobile station, the method comprising, at the mobile station:

determining a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device;

determining a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and

determining, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.

11. The method of claim 10, and further comprising, at the mobile station:

sending the first RTT and the second RTT to another device; and

receiving, in response from the another device, the position of the mobile device.

12. The method of claim 10, and further comprising, at the mobile station:

determining a received signal strength measurement for at least one signal received via the transceiver from at least transmitting device; and

determining, at least in part, the position of the mobile station further based, at least in part, on the received signal strength.

13. The method of claim 10, wherein at least one of the first network device or the second network device is part of a short-range wireless network.

14. A non-transitional computer-readable medium having instructions stored therein that are executable by a processing unit of a mobile station to:

determine a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device;

determine a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and

determine, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.

15. The non-transitional computer-readable medium of claim 14, wherein the instructions are further executable by the processing unit of the mobile station to:

send the first RTT and the second RTT to another device; and

receive, in response from the another device, the position of the mobile device.

16. The non-transitional computer-readable medium of claim 14, wherein the instructions are further executable by the processing unit of the mobile station to:

determine a received signal strength measurement for at least one signal received via the transceiver from at least transmitting device; and

determine, at least in part, the position of the mobile station further based, at least in part, on the received signal strength.

17. The non-transitional computer-readable medium of claim 14, wherein at least one of the first network device or the second network device is part of a short-range wireless network.