Scheduling generic broadcast of location assistance data

• US 8,909,239 B2
• Filed: 08/29/2012
• Issued: 12/09/2014
• Est. Priority Date: 08/30/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Edge, Stephen William, Fischer, Sven
• Primary Examiner(s): Siddiqui, Kashif
• Application Number:
  US13/598,551
• Publication Number:
  US 20130225185A1
• Time in Patent Office: 832 Days
• Field of Search: 455/456.1, 455/456.2, 455/456.3, 455/456.4, 455/456.5, 455/456.6, 455/457
• US Class Current: 455/450
• CPC Class Codes: G01S 19/05 providing aiding data
• CPC Class Codes: G01S 19/25 involving aiding data received from a cooperating element, e.g. assisted GPS
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 9/0637 Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
• CPC Class Codes: H04L 9/3249 using RSA or related signature schemes, e.g. Rabin scheme
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• CPC Class Codes: H04W 12/10 Integrity
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• 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

Abstract

Various techniques are provided for Location Services (LCS) Assistance Data broadcast, for example for implementation in LTE and LTE-A systems. The embodiments described herein may use the LPP/LPPe positioning protocol, by making use of existing unsolicited Provide Assistance Data (PAD) messages. Embodiments avoid the need to define and implement a separate broadcast Assistance Data protocol. Additional exemplary embodiments for scheduling and verifying of the broadcast Assistance Data messages are described herein.

Claims

1. A method for receiving Assistance Data (AD) messages for location services, comprising:

transmitting a request for a first type of AD message;

subsequent to the request, receiving an information block, wherein the information block includes a master schedule defined for different types of AD messages broadcast for location services including the first type of AD message;

identifying a broadcast schedule for the first type of AD message from the master schedule; and

receiving a broadcast of the first type of AD message based on the schedule for the first type of AD message.

2. The method of claim 1, wherein the first AD message is received as part of one or more information blocks.

3. The method of claim 1, wherein the information block is an LTE system information block (SIB) for location services.

4. The method of claim 1, wherein the information block further comprises a second schedule for a transmission of the master schedule.

5. The method of claim 4, wherein the master schedule further comprises the second schedule for the transmission of the master schedule.

6. The method of claim 1, wherein the information block further comprises a version identifier associated with changes in the master schedule.

7. The method of claim 1, wherein the schedule for the first AD message comprises one or more of a Type ID, a number of segments or a number of messages indication, an indication of message or segment transmission and an end message flag.

8. The method of claim 7, wherein the end message flag indicates if consecutive segments sent will end the first AD message.

9. The method of claim 1, wherein the types of AD messages comprise messages defined by an LTE Positioning Protocol (LPP) or an LPP Extensions (LPPe) positioning protocol.

10. The method of claim 1, wherein the master schedule is received from a broadcast subsystem.

11. The method of claim 1, wherein the master schedule is received from a Location Server.

12. A method for sending Assistance Data (AD) messages for location services, comprising:

receiving a request for a first type of AD message;

determining broadcast schedules for a plurality of types of AD messages including the first type of AD message;

constructing an information block, wherein the information block comprises a master schedule defined for the plurality of different types of AD messages broadcast for location services including the broadcast schedule defined for the plurality of types of AD messages, including the requested first type of AD message; and

transmitting the information block to a broadcast node.

13. The method of claim 12, wherein the information block is an LTE system information block (SIB) for location services.

14. The method of claim 12, wherein the information block further comprises a second schedule for a transmission of the master schedule.

15. The method of claim 12, wherein the information block further comprises a version identifier associated with changes in the master schedule.

16. The method of claim 12, wherein the broadcast schedule for the at least one type of AD message comprises one or more of a Type ID, a number of segments or a number of messages indication, an indication of message or segment transmission and an end message flag.

17. The method of claim 16, wherein the end message flag indicates if consecutive segments sent will end a first AD message.

18. The method of claim 12, wherein the types of AD messages comprise messages defined by an LTE Positioning Protocol (LPP) or an LPP Extensions (LPPe) positioning protocol.

19. The method of claim 12, wherein the method is performed at a Location Server.

20. The method of claim 12, further comprising:

determining to broadcast the at least one type of AD message;

constructing a Provide Assistance Data (PAD) message; and

sending the PAD message to the broadcast node using the broadcast schedule defined for the at least one type of AD message.

40. The method of claim 12, further comprising:

receiving a plurality of requests for the first type of AD message;

modifying the broadcast schedule for the first type of AD message to increase the frequency of the broadcast of the first type of AD message;

modifying the information block, wherein the information block based on the modified broadcast schedule for the first type of AD message; and

transmitting the modified information block to a broadcast node.

41. The method of claim 12, further comprising transmitting the information block to a plurality of broadcast nodes.

21. A device for receiving Assistance Data (AD) messages for location services, comprising:

a transceiver configured to;

transmit a request for a first type of AD message;

subsequent to the request, receive an information block, wherein the information block includes a master schedule defined for different types of AD messages broadcast for location services; and

a processor configured to;

identify a broadcast schedule for the first type of AD message from the master schedule;

wherein the transceiver is further configured to receive a broadcast of the first type of AD message based on the schedule for the first type of AD message.

22. The device of claim 21, wherein the first AD message is received, by the transceiver, as part of one or more information blocks.

23. The device of claim 21, wherein the information block is an LTE system information block (SIB) for location services.

24. The device of claim 21, wherein the information block further comprises a second schedule for a transmission of the master schedule.

25. The device of claim 24, wherein the master schedule further comprises the second schedule for the transmission of the master schedule.

26. The device of claim 21, wherein the information block further comprises a version identifier associated with changes in the master schedule.

27. The device of claim 21, wherein the schedule for the first AD message comprises one or more of a Type ID, a number of segments or a number of message indications, an indication of message or segment transmission and an end message flag.

28. The device of claim 27, wherein the end message flag indicates if consecutive segments sent will end the first AD message.

29. The device of claim 21, wherein the types of AD messages comprise messages defined by an LTE Positioning Protocol (LPP) or LPP Extensions (LPPe) positioning protocol.

30. The device of claim 21, wherein the master schedule is received from a broadcast subsystem.

31. The device of claim 21, wherein the master schedule is received from a Location Server.

32. A device for sending assistance data (AD) messages for location services, comprising:

a processor configured to;

determine broadcast schedules for a plurality of types of AD messages; and

construct an information block, wherein the information block comprises a master schedule defined for the plurality of different types of AD messages broadcast for location services including the broadcast schedule defined for the plurality of types of AD messages, including the requested first type of AD message; and

a transceiver configured to;

receive a request for a first type of AD message; and

transmit the information block to a broadcast node; and

wherein the processor is further configured to determine the broadcast schedules including a broadcast schedule for the first type of AD message.

33. The device of claim 32, wherein the information block is an LTE system information block (SIB) for location services.

34. The device of claim 32, wherein the information block further comprises a version identifier associated with changes in the master schedule.

35. The device of claim 32, wherein the broadcast schedule for the at least one type of AD message comprises one or more of a Type ID, a number of segments or a number of messages indication, an indication of message or segment transmission and an end message flag.

36. The device of claim 32, wherein the types of AD messages comprise messages defined by an LTE Positioning Protocol (LPP) or an LPP Extensions (LPPe) positioning protocol.

37. The device of claim 32, where in:

the processor is further configured to;

determine to broadcast the at least one type of AD message; and

construct a Provide Assistance Data (PAD) message;

wherein the transceiver is further configured to send the PAD message to the broadcast node using the broadcast schedule defined for the at least one type of AD message.

38. A non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium comprises instructions executable by a processor, the instructions comprising instructions to:

transmit a request for a first type of AD message;

subsequent to the request, receive an information block, wherein the information block includes a master schedule defined for different types of AD messages broadcast for location services including the first type of AD message;

identify a broadcast schedule for the first type of AD message from the master schedule;

receive a broadcast of the first type of AD message based on the schedule for the first type of AD message.

39. A non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium comprises instructions executable by a processor, the instructions comprising instructions to:

determine broadcast schedules for a plurality of types of AD messages; and

construct an information block, wherein the information block comprises a master schedule defined for the plurality of different types of AD messages broadcast for location services including the broadcast schedule defined for the plurality of types of AD messages, including the requested first type of AD message; and

transmit the information block to a broadcast node.