Method, apparatus and system for measuring a position of a user equipment in a wireless network

1. One or more non-transitory, computer-readable media having instructions that, when executed, cause a target user equipment (UE) in a wireless network to:

receive a first message from a location base server, wherein the first message includes position assistance data that includes an identity of an anchor UE whose position is known to the location base server;

transmit a second message to the anchor UE in the wireless network, wherein the second message includes an inquiry about whether a position of the anchor UE is knowable to the target UE;

receive a third message from the anchor UE, wherein the third message includes a response to the inquiry indicating that the position of the anchor UE is knowable to the target UE; and

perform a positioning measurement based on the third message.

2. The one or more non-transitory, computer-readable media of claim 1 , wherein the identity is a device identifier and the position assistance data in the first message further comprises a physical cell identifier (physCellId) for each of a serving cell in which the anchor UE is located; and an indicator (prsType) to specify a position reference signal type that is feasible for a position measurement between the target UE and the anchor UE.

3. The one or more non-transitory, computer-readable media of claim 1 , wherein the first message includes a plurality of d2d-positioning-anchor-lists, each having a device identifier (deviceID) for one of a plurality of anchor UEs, a physical cell identifier (phyCellId) for a serving cell in which one of the plurality of anchor UEs is located, and one indicator about whether a device-to-device positioning measurement to measure a delta position between the target UE and a respective one of the plurality of anchor UEs is feasible (prsType).

4. The one or more non-transitory, computer-readable media of claim 1 , wherein the identity is a device identifier (deviceID) and the instructions, when executed, further cause the target UE to search for a physical cell identifier (phyCellId) for a serving cell in which the anchor UE is located, based on the deviceID.

5. The one or more non-transitory, computer-readable media of claim 1 , wherein the positioning measurement is a measurement of relative positioning of the target UE with respect to the anchor UE, and the instructions, when executed, further cause the target UE to generate a position report based on the positioning measurement to be sent to a serving evolved NodeB (eNB) through a radio resource control (RRC) connection.

6. The one or more non-transitory, computer-readable media of claim 1 , wherein to perform the positioning measurement, the target UE is to measure a round trip time of a light wave or sonar wave.

7. The one or more non-transitory, computer-readable media of claim 1 , wherein the wireless network complies with Long Term Evolution (LTE) standards of 3rd Generation Partnership Project along with any amendments, updates and/or revisions.

8. The one or more non-transitory, computer-readable media of claim 1 , wherein the wireless network complies with wireless local area networks (WLAN) standards.

9. An anchor user equipment (UE) in a wireless network, comprising:

communication circuitry to:

transmit a first message to a location base server, wherein the first message includes position information related to the anchor UE;

receive a second message from a target UE in the wireless network, wherein the second message includes an inquiry about whether a position of the anchor UE is knowable to the target UE; and

transmit a third message from the anchor UE, wherein the third message includes a response to the inquiry indicating that the position of the anchor UE is knowable to the target UE; and

control circuitry, coupled with the communication circuitry, the control circuitry to determine that the position of the anchor UE is knowable to the target UE based on a security factor.

10. The anchor UE of claim 9 , wherein the position information in the first message comprises a relative position of the anchor UE, which includes a device identifier (deviceID) for the anchor UE, a physical cell identifier (physCellId) for a serving cell in which the anchor UE is located, and/or an indicator (prsType) to specify a position reference signal type that is feasible for a position measurement between the target UE and the anchor UE.

11. The anchor UE of claim 9 , wherein the third message includes a device identifier (deviceID) of the anchor UE and an indicator (prsType) to specify a position reference signal type that is feasible for a position measurement between the target UE and the anchor UE.

12. The anchor UE of claim 9 , wherein the third message further includes a physical cell identifier (phyCellId) for a serving cell in which the anchor UE is located.

13. A target user equipment (UE) in a wireless network, comprising:

means for receiving a first message from a location base server, wherein the first message includes position assistance data that includes an identity of an anchor UE whose position is known to the location base server;

means for transmitting a second message to the anchor UE in the wireless network, wherein the second message includes an inquiry about whether a position of the anchor UE is knowable to the target UE; and

means for receiving a third message from the anchor UE, wherein the third message includes a response to the inquiry indicating that the position of the anchor UE is knowable to the target UE; and

means for performing a positioning measurement based on the third message.

14. The target UE of claim 13 , wherein the identity is a device identifier (deviceID) and the position assistance data in the first message further comprises a physical cell identifier (physCellId) for a serving cell in which the anchor UE is located, and an indicator (prsType) to specify a position reference signal type that is feasible for a position measurement between the target UE and the anchor UE.

15. The target UE of claim 13 , wherein the third message includes a device identifier (deviceID) of the anchor UE whose position is knowable to the target UE.

16. The target UE of claim 13 , further comprising:

means for searching for a physical cell identifier (phyCellId) for a serving cell in which the anchor UE is located, based on the identity received in the first message.

17. The target UE of claim 13 ,

wherein means for performing the positioning measurement comprises means for measuring a delta position between the target UE and the anchor UE whose position is knowable to the target UE and the target UE further comprises:

means for generating a position report for the target UE, based on the position assistance data of the anchor UE and the delta position between the target UE and the anchor UE; and

means for transmitting, through a radio resource control (RRC) connection, a fourth message including the position report to a serving evolved NodeB (eNB).

18. The target UE of claim 13 , wherein the wireless network complies with Long Term Evolution (LTE) standards of 3rd Generation Partnership Project along with any amendments, updates and/or revisions.

19. The target UE of claim 13 , wherein the wireless network complies with wireless local area networks (WLAN) standards.