Mobile station use of round trip time measurements

Patent metadata

Field	Value
Publication number	US-9247446-B2
Application number	US-201514822441-A
Country	US
Kind code	B2
Filing date	Aug 10, 2015
Priority date	Apr 30, 2010
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

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.

First claim

What is claimed is:

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.

Assignees

• Qualcomm Inc

Inventors

• Das Saumitra Mohan
• Aggarwal Alok
• Naguib Ayman Fawzy
• Hardie Edward Thomas Lingham

Classifications

• H04W88/02

  Terminal devices · CPC title

• H04W24/10 Primary

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

• H04W4/008

  Electricity · mapped topic

• H04W84/10

  Small scale networks; Flat hierarchical networks · CPC title

• H04L43/0864

  Round trip delays · CPC title