Device for round trip time measurements

• US 9,137,681 B2
• Filed: 01/28/2013
• Issued: 09/15/2015
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• 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:
  US13/752,270
• Publication Number:
  US 20130143497A1
• Time in Patent Office: 960 Days
• Field of Search: 455/41.2, 455/456.1, 370/328, 370/338
• 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

An appliance facilitates localization of a station (STA) in a network, for example, a short-range wireless network. An automatic response to a request for a measurement related communication is provided. The appliance can include a radio frequency (RF) interface and a media access control (MAC) section. The MAC section can receive the request and generate the automatic response immediately after a uniform period that is uniform among any such appliance within the network. The appliance performs only the generation of the automatic response, though the response can include additional information such as (x, y) coordinates of the appliance.

Claims

1. An apparatus for facilitating localization of a station (STA) in a short-range wireless network, the apparatus comprising:

a radio frequency (RF) interface;

memory; and

a processing unit coupled to the RF interface and the memory and configured to;

receive, over the RF interface, from the STA, a request for measurement related communication;

recognize the request for measurement related communication; and

initiate transmission, to the STA, via the RF interface, of a response to the request, after a uniform delay is established;

wherein the uniform delay is implemented in each of a plurality of apparatuses within the short-range wireless network; and

wherein the response is for generating a round-trip time (RTT) for facilitating localization of the STA.

2. The apparatus of claim 1, wherein the request for measurement related communication includes a request for round trip time (RTT) measurement related communication and wherein the response forms a RTT measurement related communication.

3. The apparatus of claim 1, wherein the RF interface supports an 802.11 transmission band.

4. The apparatus of claim 1, wherein the processing unit is further configured to initiate transmission, via the RF interface, of a uniform resource identifier (URI) associated with a resource containing additional location information.

5. The apparatus of claim 1, wherein the response includes a localization criterion.

6. The apparatus of claim 5, wherein the localization criterion includes an (x, y) coordinate pair associated with a location of the apparatus and the response includes the (x, y) coordinate pair.

7. The apparatus of claim 1, wherein the response includes an acknowledgement (ACK) of the request for measurement related communication, the ACK forming the measurement related communication.

8. The apparatus of claim 1, wherein the apparatus comprises a dedicated network apparatus.

9. An apparatus for facilitating localization of a station (STA) in a short-range wireless network, the apparatus comprising:

means for receiving, from the STA, a request for measurement related communication;

means for recognizing the request for measurement related communication;

means for generating a response associated with the request, wherein the uniform delay is implemented in each of a plurality of dedicated network apparatuses within the short-range wireless network; and

means for transmitting the response to the request for measurement related communication after a uniform delay, wherein the uniform delay is implemented in each of a plurality of dedicated network apparatuses within the short-range wireless network;

wherein the response is for generating a round-trip time (RTT) for facilitating localization of the STA.

10. The apparatus of claim 9, wherein the request for measurement related communication includes a request for round trip time (RTT) measurement related communication.

11. The apparatus of claim 9, wherein the means for transmitting and the means for receiving support an 802.11 transmission band.

12. The apparatus of claim 9, wherein the response includes a uniform resource identifier (URI) associated with a resource containing additional location information.

13. The apparatus of claim 9, wherein the means for transmitting further comprises means to transmit, in a beacon message, a uniform resource identifier (URI) associated with a resource containing location information.

14. The apparatus of claim 9, wherein the means for transmitting further comprises means to transmit, in a beacon message, an (x, y) coordinate pair associated with a location of the dedicated network apparatus.

15. The apparatus of claim 9, wherein the response includes an (x, y) coordinate pair associated with a location of the apparatus.

16. The apparatus of claim 9, wherein the response includes an acknowledgement (ACK) frame of the request for measurement related communication, the ACK frame forming the measurement related communication.

17. The apparatus of claim 9, wherein the response includes a beacon frame, and wherein the means for transmitting further comprises means for implementing a carrier sense mechanism, a back-off mechanism using the beacon frame, or both.

18. The apparatus of claim 9, wherein the apparatus comprises a dedicated network apparatus.

19. A method for facilitating localization in a short-range wireless network utilizing an apparatus, the method comprising:

receiving, from a station (STA), a request for measurement related communication at the apparatus, wherein the apparatus is one of a plurality of apparatuses in the short-range wireless network;

recognizing the request for measurement related communication at the apparatus; and

transmitting, to the STA, a response to the request, from the apparatus, after a uniform processing delay;

wherein the uniform processing delay is implemented in each of the plurality of apparatuses; and

wherein the response is for generating a round-trip time (RTT) for facilitating localization.

20. The method of claim 19, wherein the response includes a uniform resource identifier (URI) associated with a resource containing additional location information.

21. The method of claim 19, wherein the response includes an (x, y) coordinate pair associated with a location of the apparatus.

22. The method of claim 19, wherein the response includes an acknowledgement (ACK) of the request for measurement related communication, the ACK forming the measurement related communication.

23. The method of claim 19, wherein the apparatus comprises a dedicated network apparatus.

24. A non-transitory computer-readable medium, for use with an apparatus, having instructions thereon for providing localization of a station (STA) in a short-range wireless network, the instructions being executable by a processing unit of the apparatus to perform operations, the instructions comprising:

code to receive, from the STA, a request for measurement related communication;

code to recognize the request for measurement related communication; and

code to transmit, to the STA, a response to the request for the measurement related communication, after a uniform delay for processing of the request and the response;

wherein the uniform delay is implemented in each of a plurality of apparatuses within the short-range wireless network; and

wherein the response is for generating a round-trip time (RTT) for facilitating localization.

25. The non-transitory computer-readable medium of claim 24, wherein the response includes a uniform resource identifier (URI), the URI associated with a resource containing additional location information.

26. The non-transitory computer-readable medium of claim 24, wherein the response includes an (x, y) coordinate pair associated with a location of a corresponding element within the short-range wireless network that is capable of providing the response.

27. The non-transitory computer-readable medium of claim 24, wherein the response includes an acknowledgement (ACK) of the request for measurement related communication, the ACK forming the measurement related communication.

28. The non-transitory computer-readable medium of claim 24, wherein the apparatus comprises a dedicated network apparatus.