Enhanced LTE positioning protocol information transfer procedures for control plane LCS on LTE

• US 9,241,322 B2
• Filed: 01/23/2015
• Issued: 01/19/2016
• Est. Priority Date: 09/11/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Jiang, Yongjin, He, Rui, Edge, Stephen William, Burroughs, Kirk Allan, Fischer, Sven
• Primary Examiner(s): TRAN, CONGVAN
• Application Number:
  US14/604,386
• Publication Number:
  US 20150141049A1
• Time in Patent Office: 361 Days
• Field of Search: 455/456.5, 455/456.1, 455/456.6, 455/404.2, 455/412.1, 455/414.4, 455/432.2, 370/310.1, 370/395.5
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1803 Stop-and-wait protocols
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Techniques disclosed herein provide for enhanced LTE Positioning Protocol (LPP) Reliable Transport where the receiver of an LPP message sends a non-piggybacked acknowledgement. An example method for executing on a mobile device a protocol session with a location server includes sending a first protocol session message associated with a first protocol session to the location server, entering a wait-for-acknowledgement state in which uplink transmissions from the mobile device to the location server are suspended while waiting for an acknowledgement from the location server in response to the first protocol session message, receiving a second protocol session message associated with a second protocol session which is not an acknowledgement to the first protocol session message but includes information requested in the first protocol session message; exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message; and performing an action using the information received in the second protocol session message.

Claims

1. A method for executing on a location server a protocol session with a mobile device using a protocol with mechanisms that allow for transport of protocol messages over a non-reliable link, the method comprising:

sending a first protocol session message associated with a first protocol session to the mobile device;

entering a wait-for-acknowledgement state in which downlink transmissions from the location server to the mobile device are suspended while waiting for an acknowledgement from the mobile device in response to the first protocol session message;

receiving a second protocol session message associated with a second protocol session, the second protocol session message not being the acknowledgement from the mobile device in response to the first protocol session message, the second protocol session message including information requested in the first protocol session message;

exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message; and

performing an action using the information received in the second protocol session message.

2. The method of claim 1 wherein the first protocol session message comprises a request for information from the mobile device and the second protocol session message includes the information from the mobile device.

3. The method of claim 1, further comprising:

resending the first protocol session message to the mobile device if neither the acknowledgement from the mobile device in response to the first protocol session message nor the second protocol session message is received by the mobile device prior to expiration of a retransmission timer.

4. The method of claim 1, further comprising:

comparing a first transaction ID associated with the first protocol session message to a second transaction ID associated with the second protocol session message, and

exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message only if the first transaction ID matches the second transaction ID.

5. The method of claim 1 wherein the first protocol session message is an LTE Positioning Protocol (LPP) Provide Assistance Data message and the second protocol session message is an LPP Provide Location Information message.

6. An apparatus for executing on a location server a protocol session with a mobile device using a protocol with mechanisms that allow for transport of protocol messages over a non-reliable link, the apparatus comprising:

means for sending a first protocol session message associated with a first protocol session to the mobile device;

means for entering a wait-for-acknowledgement state in which downlink transmissions from the location server to the mobile device are suspended while waiting for an acknowledgement from the mobile device in response to the first protocol session message;

means for receiving a second protocol session message associated with a second protocol session, the second protocol session message not being the acknowledgement from the mobile device in response to the first protocol session message, the second protocol session message including information requested in the first protocol session message;

means for exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message; and

means for performing an action using the information received in the second protocol session message.

7. The apparatus of claim 6 wherein the first protocol session message comprises a request for information from the mobile device and the second protocol session message includes the information from the mobile device.

8. The apparatus of claim 6, further comprising:

means for resending the first protocol session message to the mobile device if neither the acknowledgement from the mobile device in response to the first protocol session message nor the second protocol session message is received by the mobile device prior to expiration of a retransmission timer.

9. The apparatus of claim 6, further comprising means for comparing a first transaction ID associated with the first protocol session message to a second transaction ID associated with the second protocol session message, and wherein the means for exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message operates only if the first transaction ID matches the second transaction ID.

10. The apparatus of claim 6 wherein the first protocol session message is an LTE Positioning Protocol (LPP) Provide Assistance Data message and the second protocol session message is an LPP Provide Location Information message.

11. An apparatus for executing on a location server a protocol session with a mobile device using a protocol with mechanisms that allow for transport of protocol messages over a non-reliable link, the apparatus comprising:

a network interface configured to transmit and receive data via one or more networks;

a memory configured to store processor-executable program code;

a processor configured to;

send a first protocol session message associated with a first protocol session to the mobile device;

enter a wait-for-acknowledgement state in which downlink transmissions from the location server to the mobile device are suspended while waiting for an acknowledgement from the mobile device in response to the first protocol session message;

receive a second protocol session message associated with a second protocol session, the second protocol session message not being the acknowledgement from the mobile device in response to the first protocol session message, the second protocol session message including information requested in the first protocol session message;

exit the wait-for-acknowledgement state responsive to receiving the second protocol session message; and

perform an action using the information received in the second protocol session message.

12. The apparatus of claim 11 wherein the first protocol session message comprises a request for information from the mobile device and the second protocol session message includes the information from the mobile device.

13. The apparatus of claim 11 wherein the processor is further configured to:

resend the first protocol session message to the mobile device if neither the acknowledgement from the mobile device in response to the first protocol session message nor the second protocol session message is received by the mobile device prior to expiration of a retransmission timer.

14. The apparatus of claim 11 wherein the processor is further configured to:

compare a first transaction ID associated with the first protocol session message to a second transaction ID associated with the second protocol session message, and

exit the wait-for-acknowledgement state responsive to receiving the second protocol session message only if the first transaction ID matches the second transaction ID.

15. The apparatus of claim 11 wherein the first protocol session message is an LTE Positioning Protocol (LPP) Provide Assistance Data message and the second protocol session message is an LPP Provide Location Information message.

16. A non-transitory computer-readable medium, having stored thereon computer-readable instructions for executing on a location server a protocol session with a mobile device using a protocol with mechanisms that allow for transport of protocol messages over a non-reliable link, comprising instructions configured to cause a computer to:

send a first protocol session message associated with a first protocol session to the mobile device;

enter a wait-for-acknowledgement state in which downlink transmissions from the location server to the mobile device are suspended while waiting for an acknowledgement from the mobile device in response to the first protocol session message;

receive a second protocol session message associated with a second protocol session, the second protocol session message not being the acknowledgement from the mobile device in response to the first protocol session message, the second protocol session message including information requested in the first protocol session message;

exit the wait-for-acknowledgement state responsive to receiving the second protocol session message; and

perform an action using the information received in the second protocol session message.

17. The non-transitory computer-readable medium of claim 16 wherein the first protocol session message comprises a request for information from the mobile device and the second protocol session message includes the information from the mobile device.

18. The non-transitory computer-readable medium of claim 16, further comprising instructions to cause the computer to:

resend the first protocol session message to the mobile device if neither the acknowledgement from the mobile device in response to the first protocol session message nor the second protocol session message is received by the mobile device prior to expiration of a retransmission timer.

19. The non-transitory computer-readable medium of claim 16, further comprising instructions to cause the computer to:

compare a first transaction ID associated with the first protocol session message to a second transaction ID associated with the second protocol session message, and

exit the wait-for-acknowledgement state responsive to receiving the second protocol session message only if the first transaction ID matches the second transaction ID.

20. The non-transitory computer-readable medium of claim 16 wherein the first protocol session message is an LTE Positioning Protocol (LPP) Provide Assistance Data message and the second protocol session message is an LPP Provide Location Information message.