Location requests and measurement responses in wireless communications networks and methods

• US 20040180645A1
• Filed: 03/11/2003
• Published: 09/16/2004
• Est. Priority Date: 03/11/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Bussan, Christopher F., Hefner, Eric J.
• Granted Patent: US 8,699,990 B2
• Time in Patent Office: Days
• US Class Current: 455/404.2
• CPC Class Codes: G01S 5/0236 Assistance data, e.g. base station almanac
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method for requesting location information, for example, Enhanced Observed Time of Arrival timing information, from mobile wireless communications in wireless communications networks. The exemplary location request (300) includes multiple response interval field (310) specifying intervals at which multiple responses to the location request must be sent or maximum intervals between which multiple responses to the location request must be sent, a final response time field (320) specifying a maximum time interval during which a final response to the location request must be sent, and an initial response time field (330) specifying when an initial response to the location request must be sent.

Claims

1. A method in a mobile wireless communications device, the method comprising:

receiving a network location request at the mobile wireless communications device;

sending multiple responses to the same network location request,

the multiple responses sent from the mobile wireless communications device.

2. The method of claim 1,

the network location request is for Enhanced Observed Time Difference (E-OTD) measurement information,

sending multiple responses to the network location request includes sending at least two responses,

each response including measurement information for a plurality of cells.

3. The method of claim 1,

obtaining multiple measurement information sets,

each measurement information set including measurements on a plurality of terrestrial signal sources,

sending multiple responses to the same network location request includes sending the multiple measurement information sets.

4. The method of claim 3,

sending multiple measurement information sets in a single response to the network location request.

5. The method of claim 3,

completing each of the multiple measurement information sets when a variance of multiple measurements on each of the plurality of terrestrial signal sources satisfies a condition.

6. The method of claim 3,

completing each of the multiple measurement information sets when a rate of change of standard deviation of multiple measurements on each of the plurality signal sources satisfies a condition.

7. The method of claim 1, sending multiple responses in response to a request for multiple responses in the network location request.

8. The method of claim 1, sending multiple responses at response intervals specified in the network location request.

9. The method of claim 1,

each response including measurement information for a plurality of signal sources,

sending each response when a variance of multiple measurements on each signal source of the plurality of signal sources satisfies a condition.

10. The method of claim 1,

each response including measurement information for a plurality of signal sources,

sending each response when a rate of change of standard deviation of multiple measurements on each signal source of the plurality of signal sources satisfies a condition.

11. The method of claim 1,

the network location request includes a response time,

sending a preliminary response to the network location request,

the preliminary response sent before the response time specified in the network location request;

sending another response after the preliminary response not later than the response time specified in the network location request.

12. The method of claim 11,

receiving an updated signal source list based upon the preliminary response sent in response to the network location request.

13. The method of claim 11, sending the preliminary response to the network location request includes sending rough timing information obtained from signal sources to which the mobile wireless communications device is synchronized for handovers.

14. The method of claim 1,

the network location request including final response time information;

sending a final response not later than a final response time specified in the network location request.

15. The method of claim 1,

the network location request including initial response time information;

sending an initial response not later than an initial response time specified in the network location request.

16. The method of claim 1,

sending a response with an indication that the response is a final response sent in response to the location request.

17. A method in a mobile wireless communications device, the method comprising:

receiving a network location request at the mobile wireless communications device;

measuring a signal;

sending a response, based on the signal measurement, to the network location request after the occurrence of at least one of

a variance of multiple measurements on the signal satisfies a condition, and

a rate of change of standard deviation of multiple measurements on the signal satisfies a condition.

18. The method of claim 17,

measuring a plurality of at least two signals from corresponding signal sources,

sending a response, based on the plurality of signal measurements, to the network location request when at least one of a variance and a rate of change of standard deviation of multiple measurements on each of the plurality of signals satisfies a condition.

19. A method in a mobile wireless communications device, the method comprising:

receiving a location request at the mobile wireless communications device,

the location request including measurement information set interval information;

obtaining measurement information sets at intervals not later than measurement information set intervals specified in the network location request;

sending a response based on at least two measurement information sets obtained.

20. A location request message for requesting location information from mobile wireless communications in wireless communications networks, the location request message comprising:

a multiple response interval field,

the multiple response interval field for specifying at least one of

intervals at which multiple responses to the location request must be sent, and

maximum intervals between which multiple responses to the location request must be sent.

21. The location request message of claim 20, further comprising a final response time field for specifying a maximum time interval during which a final response to the location request must be sent.

22. The location request message of claim 20, further comprising an initial response time field for specifying when an initial response to the location request must be sent.

23. The location request message of claim 20 is a location request for Enhanced Observed Time of Arrival timing information including an assistance cell list from which timing information should be obtained.