DEVICE FOR ROUND TRIP TIME MEASUREMENTS

• US 20110269478A1
• Filed: 04/30/2010
• Published: 11/03/2011
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Naguib, Ayman Fawzy, Aggarwal, Alok, Hardie, Edward Thomas Lingham, Das, Saumitra Mohan
• Granted Patent: US 8,781,492 B2
• Time in Patent Office: Days
• US Class Current: 455/456.1
• 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 appliance for facilitating localization of a station (STA) in a short-range wireless network, the appliance comprising:

a radio frequency (RF) interface; and

a media access control (MAC) section coupled to the RF interface;

wherein the MAC section is configured to;

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

generate and transmit over the RF interface an automatic response to the received request immediately after a uniform period established so as to be uniform among the appliance and any other ones of the appliance within the network; and

perform only the generation of the automatic response.

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

3. The appliance according to claim 1, wherein the MAC section includes a hardware MAC section.

4. The appliance according to claim 1, wherein the RF interface includes a frequency conversion section configured to convert a transmission band frequency to a digital baseband frequency.

5. The appliance according to claim 4, wherein the transmission band frequency includes an 802.11 transmission band.

6. The appliance according to claim 1, wherein the RF interface includes a frequency conversion section configured to convert a digital baseband frequency to a transmission band frequency.

7. The appliance according to claim 6, wherein the transmission band frequency includes an 802.11 transmission band.

8. The appliance according to claim 1, wherein the response includes a uniform resource identifier (URI) associated with a resource containing additional location information.

9. The appliance according to claim 1, wherein the response includes a localization criterion.

10. The appliance according to claim 9, wherein the localization criteria includes an (x, y) coordinate pair associated with a location of the appliance and the response includes the (x, y) coordinate pair.

11. The appliance according to claim 1, wherein the response includes an acknowledgement (ACK) of the request for the measurement related communication, the ACK forming the measurement related communication.

12. An apparatus for providing localization in a short-range wireless network, the apparatus comprising:

transceiver means for receiving a request from a station (STA) for a measurement related communication and for transmitting an automatic response to the request for the measurement related communication; and

media access control (MAC) means coupled to the transceiver means, the MAC means for;

recognizing the request for the measurement related communication, the request recognized based on an identifier associated with the apparatus and a request type of the request;

causing the transceiver means to immediately generate the automatic response after a uniform period associated with recognizing the request, the uniform period uniform in the apparatus and in any other ones of the apparatus within the network, the transceiver means generating only the automatic response.

13. The apparatus according to claim 12, wherein the request for the measurement related communication includes a request for a round trip time (RTT) measurement related communication.

14. The apparatus according to claim 12, wherein the transceiver means is further for at least one of transmitting and receiving on an 802.11 transmission band.

15. The apparatus according to claim 12, wherein the automatic response includes a uniform resource identifier (URI) associated with a resource containing additional location information.

16. The apparatus according to claim 12, wherein the MAC means is further for causing the transceiver means to transmit in a beacon message a uniform resource identifier (URI) associated with a resource containing location information.

17. The apparatus according to claim 12, wherein the MAC means is further for causing the transceiver means to transmit in a beacon message an (x, y) coordinate pair associated with the location of the apparatus.

18. The apparatus according to claim 12, wherein the automatic response includes an (x, y) coordinate pair associated with a location of the apparatus.

19. The apparatus according to claim 12, wherein the automatic response includes an acknowledgement (ACK) frame of the request for the measurement related communication, the ACK frame forming the measurement related communication.

20. The apparatus according to claim 12, wherein the automatic response includes a beacon frame, and wherein the MAC means is further for implementing one of a carrier sense mechanism and a back-off mechanism using the beacon frame.

21. A method for providing localization in a short-range wireless network comprising:

receiving a request from a station (STA) for a measurement related communication at a plurality of dedicated network appliances in the short-range wireless network;

recognizing the request for the measurement related communication at the plurality of dedicated network appliances;

immediately generating an automatic response at the plurality of dedicated network appliances after a uniform processing delay associated with each of the plurality of dedicated network appliances; and

localizing the STA based on different times of arrival of respective ones of the automatic response from corresponding ones of the plurality of dedicated network appliances.

22. The method according to claim 21, wherein the localization of the STA includes trilaterating the STA using three different times of arrival from a corresponding three of the plurality of dedicated network appliances.

23. The method according to claim 21, wherein the automatic response includes a uniform resource identifier (URI) associated with a resource containing additional location information.

24. The method according to claim 21, wherein the automatic response includes an (x, y) coordinate pair associated with a location of the corresponding one of the plurality of dedicated network appliances.

25. The method according to claim 21, wherein the automatic response includes an acknowledgement (ACK) of the request for the measurement related communication, the ACK forming the measurement related communication.

26. A computer-readable medium having instructions thereon for providing localization in a short-range wireless network, the instructions, when read and executed by a processing unit, perform operations, the instructions comprising:

code to provide an automatic response to a request for a measurement related communication in the short-range wireless network;

code to receive a request from a station (STA) for a measurement related communication;

code to generate an automatic response to the received request for the measurement related communication immediately after a uniform delay for processing of the request and the automatic response, the uniform delay uniform among any elements within the network that are capable of providing the automatic response; and

code to perform only the generation of the automatic response.

27. The computer-readable medium according to claim 26, wherein the instructions further comprise code to include a uniform resource identifier (URI) with the automatic response, the URI associated with a resource containing additional location information.

28. The computer-readable medium according to claim 26, wherein the automatic response includes an (x, y) coordinate pair associated with a location of a corresponding element within the network that is capable of providing the automatic response.

29. The computer-readable medium according to claim 26, wherein the automatic response includes an acknowledgement (ACK) of the request for the measurement related communication, the ACK forming the measurement related communication.