Autonomous muting indication to enable improved time difference of arrival measurements

• US 9,435,876 B2
• Filed: 10/23/2014
• Issued: 09/06/2016
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Inventors: Frank, Colin D., Krishnamurthy, Sandeep H.
• Primary Examiner(s): Khan, Suhail
• Application Number:
  US14/521,792
• Publication Number:
  US 20150105107A1
• Time in Patent Office: 684 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G01S 5/06 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/12 takes precedence
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method, user communication device, and a base station are disclosed. A transceiver 302 may receive a serving transmission from a serving base station. A processor 304 may make a status determination of an autonomous muting status of a neighbor base station based on the serving transmission.

Claims

1. A method for measuring a time difference of arrival measurement in a mobile network, the method comprising:

receiving, by one or more processors, a serving transmission from a serving base station; and

making, by the one or more processors, a status determination of an autonomous muting status of a neighbor base station based on the serving transmission; and

applying, by the one or more processors, a muting threshold test to a neighbor base station reading when the autonomous muting status is active; and

upon passing the muting threshold test, combining, by the one or more processors, the neighbor base station into a position measurement.

2. The method of claim 1, wherein the muting threshold test is applied in order to distinguish between an actual position reference transmission and noise.

3. The method of claim 1, wherein applying the muting threshold test includes comparing the reading of the neighbor base station to a muting threshold to determine whether the reading of the neighbor base station is noise.

4. The method of claim 3, determining that the muting threshold test is passed when the reading of the neighbor base station is greater than the muting threshold.

5. The method of claim 1, further comprising sending the position measurement to the serving base station.

6. The method of claim 1, wherein making the status determination includes:

decoding a status indication from the serving transmission; and

designating the autonomous muting status of the neighbor base station as active based on the status indication.

7. The method of claim 1, wherein making the status determination includes determining that the autonomous muting status of the neighbor base station is active.

8. The method of claim 1, wherein making the status determination includes determining that the autonomous muting status of the neighbor base station is active.

9. A system for measuring a time difference of arrival measurement in a mobile network, the system comprising a user equipment device having one or more processors configured to:

receive a serving transmission from a serving base station; and

make a status determination of an autonomous muting status of a neighbor base station based on the serving transmission; and

apply a muting threshold test to a neighbor base station reading when the autonomous muting status is active; and

upon passing the muting threshold test, combining the neighbor base station into a position measurement.

10. The system of claim 9, wherein the one or more processors are configured to apply the muting threshold test in order to distinguish between an actual position reference transmission and noise.

11. The system of claim 9, wherein the one or more processors are configured to apply the muting threshold test by comparing the reading of the neighbor base station to a muting threshold to determine whether the reading of the neighbor base station is noise.

12. The system of claim 11, wherein the one or more processors are configured to determine that the muting threshold test is passed when the reading of the neighbor base station is greater than the muting threshold.

13. The system of claim 9, wherein the one or more processors are configured to send the position measurement to the serving base station.

14. The system of claim 9, wherein the one or more processors are configured to make the status determination by:

decoding a status indication from the serving transmission; and

designating the autonomous muting status of the neighbor base station as active based on the status indication.

15. A non-transitory, tangible computer-readable medium on which instructions are stored, the instructions, when executed by one or more processors, cause the one or more processors to perform a method for measuring a time difference of arrival measurement in a mobile network, the method comprising:

receiving a serving transmission from a serving base station; and

making a status determination of an autonomous muting status of a neighbor base station based on the serving transmission; and

applying a muting threshold test to a neighbor base station reading when the autonomous muting status is active; and

upon passing the muting threshold test, combining the neighbor base station into a position measurement.

16. The medium of claim 15, wherein the muting threshold test is applied in order to distinguish between an actual position reference transmission and noise.

17. The medium of claim 15, wherein applying the muting threshold test includes comparing the reading of the neighbor base station to a muting threshold to determine whether the reading of the neighbor base station is noise.

18. The medium of claim 17, wherein the method further comprises determining that the muting threshold test is passed when the reading of the neighbor base station is greater than the muting threshold.

19. The medium of claim 15, wherein the method further comprises sending the position measurement to the serving base station.

20. The medium of claim 15, wherein making the status determination includes:

decoding a status indication from the serving transmission; and

designating the autonomous muting status of the neighbor base station as active based on the status indication.