Method and apparatus for calculating a position estimate of a mobile station using network information

• US 9,020,539 B2
• Filed: 11/24/2004
• Issued: 04/28/2015
• Est. Priority Date: 11/26/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Patrick, Christopher
• Primary Examiner(s): RAMPURIA, SHARAD K
• Application Number:
  US10/580,622
• Publication Number:
  US 20070135134A1
• Time in Patent Office: 3,807 Days
• Field of Search: 4554561-457, 4554041-4042
• US Class Current: 455/456.5
• CPC Class Codes: G01S 19/09 providing processing capability normally carried out by the receiver
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 5/0263 by combining or switching between positions derived from two or more separate positioning systems
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• 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 64/006 with additional information processing, e.g. for direction or speed determination

Abstract

A method for calculating a position estimate of a mobile station (MS) includes collecting in the MS position estimate information (PEI) transmitted by a location node. At some point, the MS generates PEI parameters which include information from which the location node can be located or identified. The MS generates the PEI parameters based upon the PEI transmitted by the location node. Once generated, the MS sends the PEI parameters to a position determination entity. The PEI parameters permit calculation of the position estimate of the mobile station.

Claims

1. A method for calculating an estimate of a position of a mobile station, comprising:

collecting in a mobile station, position estimate information (PEI) transmitted by a plurality of location nodes in one or more PEI messages carried on at least one of a common channel or a dedicated channel, wherein the PEI in the one or more PEI messages includes a location node identification and longitude and latitude information of the location node of the plurality of location nodes;

generating in the mobile station, PEI parameters based upon the PEI, wherein the PEI parameters include the longitude and latitude information of the location node of the plurality of location nodes from which the location node of the plurality of location nodes can be uniquely located or identified; and

sending the PEI parameters from the mobile station to a position determination entity, wherein the PEI parameters permit calculation of a position estimate for the mobile station.

2. The method according to claim 1, further comprising:

receiving in the mobile station, a location request message from the position determination entity; and

initiating the generating of the position estimate information (PEI) parameters responsive to the location request message.

3. The method according to claim 1, further comprising:

initiating the generating of the position estimate information (PEI) parameters responsive to a location request generated by the mobile station.

4. The method according to claim 1, wherein the position estimate information (PEI) parameters include the time when the mobile station receives the PEI.

5. The method according to claim 1, wherein the position estimate information (PEI) parameters indicate whether or not the mobile station is currently in view of the location node.

6. The method according to claim 1, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include information relating to elapsed time which the mobile station has been out of view of the location node.

7. The method according to claim 1, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include velocity estimation of the mobile station.

8. The method according to claim 1, wherein if the mobile station is currently in view of the location node, the position estimate information (PEI) parameters include information relating to proximity of the mobile station relative to the location node.

9. The method according to claim 8, wherein the information relating to the proximity of the mobile station relative to the location node comprises signal strength of the location node.

10. The method according to claim 8, wherein the information relating to the proximity of the mobile station relative to the location node comprises a signal-to-interference ratio of the location node.

11. The method according to claim 8, wherein the information relating to the proximity of the mobile station relative to the location node comprises a round-trip-delay (RTD) measurement.

12. The method according to claim 1, wherein the position estimate information (PEI) parameters include a direction of motion of the mobile station.

13. The method according to claim 1, wherein the position estimate information (PEI) parameters include the channel identification at which the mobile station and the location node communicate.

14. The method according to claim 1, wherein the position estimate information (PEI) parameters include information which identifies a device type of the mobile station.

15. The method according to claim 1, wherein the position estimate information (PEI) parameters include information which identifies a transmitter type of the location node.

16. The method according to claim 1, wherein the position determination entity comprises a position determination entity (PDE) operating in a code division multiple access (CDMA) network.

17. The method according to claim 1, wherein the position determination entity comprises a service mobile location center (SMLC) operating in a global system for mobile communications (GSM) network.

18. The method according to claim 1, wherein the location node comprises a base station.

19. The method according to claim 1, wherein the location node comprises a wireless access point.

20. The method according to claim 1, wherein each of the plurality of location nodes comprises a different type of transmission entity.

21. The method according to claim 1, wherein the position estimate information (PEI) comprises a system parameters message (SPM).

22. The method according to claim 1, wherein the position estimate information (PEI) comprises a standard code division multiple access (CDMA) system parameters message (SPM).

23. The method according to claim 1, wherein the position estimate information (PEI) is a broadcast message from the location node.

24. A method for calculating a position estimate of a mobile station which has generated position estimate information (PEI) parameters based upon PEI transmitted by a location node, the method comprising:

receiving in a position determination entity, PEI parameters sent by a mobile station, the PEI parameters including information from which a location node can be located or identified including longitude and latitude information of the location node and wherein the PEI parameters contain some or all of PEI transmitted by the location node in one or more PEI messages, and additional information identified by the mobile station based on longitude and latitude information included in the PEI; and

calculating the position estimate of the mobile station based upon the PEI parameters.

25. The method according to claim 24, further comprising:

sending a location request message to the mobile station, causing the mobile station to send the position estimate information (PEI) parameters.

26. The method according to claim 24, further comprising:

sending the position estimate to the mobile station.

27. The method according to claim 24, wherein the position estimate information (PEI) parameters indicate whether or not the mobile station is currently in view of the location node.

28. The method according to claim 24, wherein the position estimate information (PEI) parameters include a pseudo-random noise (PN) code index of the location node.

29. The method according to claim 24, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include information relating to elapsed time which the mobile station has been out of view of the location node.

30. The method according to claim 24, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include velocity estimation of the mobile station.

31. The method according to claim 24, wherein if the mobile station is currently in view of the location node, the position estimate information (PEI) parameters include information relating to proximity of the mobile station relative to the location node.

32. The method according to claim 31, wherein the information relating to the proximity of the mobile station relative to the location node comprises signal strength of the location node.

33. The method according to claim 31, wherein the information relating to the proximity of the mobile station relative to the location node comprises a signal-to-interference ratio of the location node.

34. The method according to claim 31, wherein the information relating to the proximity of the mobile station relative to the location node comprises a round-trip-delay (RTD) measurement.

35. The method according to claim 24, wherein the position determination entity comprises a position determination entity (PDE) operating in a code division multiple access (CDMA) network.

36. The method according to claim 24, wherein the position determination entity comprises a service mobile location center (SMLC) operating in a global system for mobile communications (GSM) network.

37. The method according to claim 24, wherein the position estimate information (PEI) parameters include information which identifies a location of at least one of a plurality of location nodes with which the mobile station is in communication.

38. A system for calculating a position estimate of a mobile station, the system comprising:

a location node of a plurality of location nodes configured for transmitting position estimate information (PEI) to the mobile station in one or more PEI messages carried on at least one of a common channel or a dedicated channel, wherein the PEI in the one or more PEI messages includes a location node identification and longitude and latitude information of the location node of the plurality of location nodes;

a position determination entity for receiving PEI parameters sent by the mobile station, the mobile station having generated the PEI parameters based upon the PEI, and wherein the PEI parameters include the longitude and latitude information of the location node of the plurality of location nodes from which the location node of the plurality of location nodes can be located or identified; and

a processor associated with the position determination entity, the processor calculating the position estimate of the mobile station based upon the PEI parameters.

39. The system according to claim 38, wherein the position determination entity sends a location request message to the mobile station, causing the mobile station to generate the position estimate information (PEI) parameters.

40. The system according to claim 38, wherein the position estimate information (PEI) parameters indicate whether or not the mobile station is currently in view of the location node.

41. The system according to claim 38, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include information relating to elapsed time which the mobile station has been out of view of the location node.

42. The system according to claim 38, wherein if the mobile station is not currently in view of the location node, the position estimate information (PEI) parameters include velocity estimation of the mobile station.

43. The system according to claim 38, wherein if the mobile station is currently in view of the location node, the position estimate information (PEI) parameters include information relating to proximity of the mobile station relative to the location node.

44. The system according to claim 43, wherein the information relating to the proximity of the mobile station relative to the location node comprises signal strength of the location node.

45. The system according to claim 43, wherein the information relating to the proximity of the mobile station relative to the location node comprises a signal-to-interference ratio of the location node.

46. The system according to claim 43, wherein the information relating to the proximity of the mobile station relative to the location node comprises a round-trip-delay (RTD) measurement.

47. The system according to claim 38, wherein the position determination entity comprises a position determination entity (PDE) operating in a code division multiple access (CDMA) network.

48. The system according to claim 38, wherein the position determination entity comprises a service mobile location center (SMLC) operating in a global system for mobile communications (GSM) network.

49. The system according to claim 38, wherein each of the plurality of location nodes comprise a different type of transmission entity.

50. The system according to claim 38, wherein the position estimate information (PEI) comprises a system parameters message (SPM).

51. The system according to claim 38, wherein the position estimate information (PEI) comprises a standard code division multiple access (CDMA) system parameters message (SPM).

52. The system according to claim 38, wherein the position estimate information (PEI) is a broadcast message from the location node.

53. The system according to claim 38, wherein the location node comprises a base station.

54. The system according to claim 38, wherein the location node comprises a wireless access point.

55. A non-transitory computer readable medium containing instructions for controlling a computer which calculates a position estimate of a mobile station according to a method comprising:

collecting in a mobile station, position estimate information (PEI) transmitted by a plurality of location nodes in one or more PEI messages carried on at least one of a common channel or a dedicated channel, wherein the PEI in the one or more PEI messages includes a location node identification and longitude and latitude information of the location node of the plurality of location nodes;

generating in the mobile station, PEI parameters based upon the PEI, wherein the PEI parameters include the longitude and latitude information of the location node of the plurality of location nodes from which the location node of the plurality of location nodes can be uniquely located or identified; and

sending the PEI parameters from the mobile station to a position determination entity, wherein the PEI parameters permit calculation of a position estimate for the mobile station.

56. A system for calculating a position estimate of a mobile station, the system comprising:

transmitting means for transmitting position estimate information (PEI) to the mobile station in one or more PEI messages carried on one of a common channel or a dedicated channel, and wherein the PEI in the one or more PEI messages includes a location node identification and longitude and latitude information of the location node;

locating means for receiving PEI parameters sent by the mobile station, the mobile station having generated the PEI parameters based upon the PEI, and wherein the PEI parameters include information from which the location node can be located or identified including longitude and latitude information of the location node and wherein the PEI parameters contain some or all of the PEI received from the location node and additional information which can be identified by the mobile station; and

processing means associated with the locating means, the processing means calculating the position estimate of the mobile station based upon the PEI parameters.

57. A mobile station for use in a communications network, the mobile station comprising:

an antenna configured to receive position estimate information (PEI) messages comprising PEI from a location node of a plurality of location nodes of the communications network on at least one of a common channel or a dedicated channel; and

a processor communicatively coupled with the antenna and configured to process the PEI received from the location node via the antenna to;

determine a location node identification and longitude and latitude information of the location node contained in the PEI;

generate PEI parameters based upon the PEI including the longitude and latitude information such that the location node can be uniquely located or identified from the PEI parameters, and the position estimate can be calculated from the PEI parameters; and

send the PEI parameters from the mobile station via the antenna toward a position determining entity.

58. A method for calculating an estimate of a position of a mobile station, comprising:

collecting in a mobile station, a first position estimate information (PEI) transmitted by a first location node;

collecting in the mobile station, a second PEI transmitted by a second location node, wherein the second location node and the first location node belong to different systems;

generating in the mobile station, PEI parameters based upon the first PEI and the second PEI, wherein the PEI parameters include information from which the first location node and the second location node can be uniquely located and identified, wherein the PEI parameters for one of the location nodes includes longitude and latitude parameters for that location node; and

sending the PEI parameters from the mobile station to a position determination entity, wherein the PEI parameters permit calculation of a position estimate for the mobile station by the position determination entity.

59. The method of claim 58, wherein the first location node is a satellite of a satellite navigation system, and the second node is a base station of a cellular network.

60. The method of claim 59, wherein the PEI parameters associated with the base station include the longitude and latitude information of the base station.