Methods and systems for responding to handover events during positioning sessions

Patent metadata

Field	Value
Publication number	US-9344991-B2
Application number	US-201313791812-A
Country	US
Kind code	B2
Filing date	Mar 8, 2013
Priority date	Mar 8, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Disclosed are systems, methods and devices for responding to changes in a wireless access type occurring in connection with a handover event affecting a mobile terminal while the mobile terminal is engaged in a position determination session with a location server. If a first positioning protocol employed in the position determination session is not supported or enabled by the changed wireless access type, the position determination session may be resumed or restarted using a second positioning protocol supported or enabled by the changed wireless access type.

First claim

What is claimed is:

1. A method of position determination for a terminal comprising:
detecting a handover of the terminal from receiving service through a first wireless access type to receiving service through a second wireless access type while the terminal is in a position determination session with a location server according to a first positioning protocol, wherein the second wireless access type is different from the first wireless access type, wherein the position determination session with the location server according to the first positioning protocol further comprises: determining a positioning measurement, communicating a position estimate to the location server or communicating the positioning measurement to the location server, or any combination thereof; and
in response to detecting the handover, initiating a transition to application of a second positioning protocol instead of the first positioning protocol, wherein the second positioning protocol is enabled or supported by the second wireless access type.

2. The method of claim 1 , wherein the position determination session is resumed or restarted in response to the initiation of the transition to the application of the second positioning protocol.

3. The method of claim 1 , wherein the terminal comprise a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein initiating the transition to the application of the second positioning protocol further comprises:
transmitting a SUPL END message to the location server indicating that the first positioning protocol is not enabled or supported by the second wireless access type.

4. The method of claim 1 , wherein the terminal comprise a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein initiating the transition to the application of the second positioning protocol further comprises:
transmitting a SUPL REPORT message to the location server indicating at least one of the second wireless access type or capabilities of the terminal while receiving service according to the second wireless access type.

5. The method of claim 1 , wherein the terminal comprise a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein initiating the transition to the application of the second positioning protocol further comprises:
transmitting a SUPL POS INIT message to the location server indicating the second wireless access type and capabilities of the terminal while receiving service according to the second wireless access type.

6. The method of claim 1 , and further comprising in response to detecting the handover:
attempting to continue positioning under the first positioning protocol; and
terminating open positioning transactions in the position determination session if positioning under the first positioning protocol is not feasible.

7. The method of claim 6 , and further comprising transmitting a message to the location server indicating the application of the second positioning protocol without terminating the position determination session.

8. The method of claim 1 , and further comprising in response to detecting the handover:
attempting to continue the position determination session with application of the first positioning protocol; and
returning an indication to the location server that the handover to the second wireless access type has occurred for which the first positioning protocol is not enabled or supported.

9. The method of claim 1 , wherein the first positioning protocol comprises a positioning protocol selected from one of RRLP, RRC, IS-801 or LLP.

10. The method of claim 1 , wherein the second positioning protocol comprises a positioning protocol selected from one of RRLP, RRC, IS-801 or LLP.

11. The method of claim 1 , wherein the first wireless access type is selected from one of LTE, cdma2000, HRPD, WCDMA, GSM or WLAN.

12. The method of claim 1 , wherein the second wireless access type is selected from one of LTE, cdma2000, HRPD, WCDMA, GSM or WLAN.

13. The method of claim 1 , further comprising engaging in a subsequent position determination session with the location server according to the second positioning protocol, the subsequent position determination session to comprise: determination of a subsequent positioning measurement, communication of a subsequent position estimate to the location server or communication of a subsequent positioning measurement to the location server, or any combination thereof.

14. A mobile terminal comprising:
a transceiver to transmit messages to and receive messages from a wireless communication network; and
a processor configured to:
detect a handover of the mobile terminal from receiving service at the transceiver through a first wireless access type to receiving service through a second wireless access type while the mobile terminal is in a position determination session with a location server according to a first positioning protocol, wherein the second wireless access type is different from the first wireless access type, wherein the position determination session with the location server according to the first positioning protocol further comprises: determination of a positioning measurement, communication of a position estimate to the location server or communication of the positioning measurement to the location server, or any combination thereof; and
in response to detection of the handover, initiate a transition to application of a second positioning protocol instead of the first positioning protocol, wherein the second positioning protocol is enabled or supported by the second wireless access type.

15. The mobile terminal of claim 14 , wherein the mobile terminal comprises a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein the processor is further configured to initiate the transition to the application of the second positioning protocol by initiating transmission of a SUPL END message through the transceiver to the location server indicating that the first positioning protocol is not enabled or supported by the second wireless access type.

16. The mobile terminal of claim 14 , wherein the mobile terminal comprises a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein the processor is further configured to initiate the transition to the application of the second positioning protocol by initiating transmission of a SUPL REPORT message through the transceiver to the location server indicating at least one of the second wireless access type or capabilities of the mobile terminal while receiving service according to the second wireless access type.

17. The mobile terminal of claim 14 , wherein the mobile terminal comprises a SUPL enabled terminal (SET) and the location server comprises a SUPL location platform (SLP), and wherein the processor is further configured to initiate the transition to the application of the second positioning protocol by initiating transmission of a SUPL POS INIT message through the transceiver to the location server indicating the second wireless access type and capabilities of the SET while receiving service according to the second wireless access type.

18. The mobile terminal of claim 14 , the processor further to engage in a subsequent position determination session with the location server according to the second positioning protocol, the subsequent position determination session to comprise: determination

Assignees

• Qualcomm Inc

Inventors

• Edge Stephen William
• Wachter Andreas Klaus

Classifications

• H04W64/00 Primary

  Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management · CPC title

• H04W36/14

  Reselecting a network or an air interface · CPC title

• H04W36/144

  over a different radio air interface technology · CPC title