Wireless device location services

• US 10,194,431 B2
• Filed: 02/12/2018
• Issued: 01/29/2019
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Wireless Future Technologies, Inc. (Quarterhill Inc. (f/k/a Wi-LAN Inc.))
• Original Assignee: Wireless Future Technologies, Inc. (Quarterhill Inc. (f/k/a Wi-LAN Inc.))
• Inventors: Hooli, Kari Juhani, Kahaduwe, Ajit, Lunttila, Timo Erkki, Ranta-Aho, Karri Markus, Toskala, Antti Anton
• Primary Examiner(s): Trieu, Van T
• Application Number:
  US15/894,469
• Publication Number:
  US 20180255432A1
• Time in Patent Office: 351 Days
• CPC Class Codes: G01S 5/0009 Transmission of position information to remote stations involving assistance data G01S5/0236
• CPC Class Codes: G01S 5/06 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/12 takes precedence
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• 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 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A system for determining location information for a wireless device is described. The system includes a UE, a LE and multiple LMUs. The LE sends, to the LMUs, reception instructions with characteristics of the signal transmission from the UE and each LMU receives, from the LE, the reception instructions. The UE sends a signal transmission. Each LMU receives the transmitted signal from the UE, determines locating information based at least in part of the received signal and sends the locating information to the LE. The LE receives the locating information regarding the transmitted signal and determines a location of the UE based at least in part on the received locating information. Methods, apparatus and computer readable media are also described.

Claims

1. A user equipment comprising:

a receiver and a processor configured to receive a radio resource control (RRC) signal including uplink (UL) sounding reference signal (SRS) configuration information; and

the receiver and the processor further configured to receive a semi-persistent scheduling (SPS) message to initiate transmission of UL SRSs; and

the processor and a transmitter configured to transmit UL SRSs in a time and frequency pattern based on the UL SRS configuration information and the SPS message.

2. The user equipment of claim 1, wherein the RRC signal is a dedicated RRC signal.

3. The user equipment of claim 1, wherein the RRC signal is a broadcast RRC signal.

4. The user equipment of claim 1, wherein the receiver and the processor are further configured to receive a first message to transmit periodic UL SRS, and the transmitter and the processor are further configured to transmit periodic UL SRS in response to the received first message.

5. The user equipment of claim 1, wherein the SPS message includes a reference to a signal characteristic.

6. The user equipment of claim 1, wherein the transmitter and the processor are further configured to transmit a physical uplink shared channel (PUSCH) with a demodulation reference signal.

7. A method for use in a user equipment, the method comprising:

receiving, by the user equipment, a radio resource control (RRC) signal including uplink (UL) sounding reference signal (SRS) configuration information;

receiving, by the user equipment, a semi-persistent scheduling (SPS) message to initiate transmission of UL SRSs; and

transmitting, by the user equipment, UL SRSs in a time and frequency pattern based on the UL SRS configuration information and the SPS message.

8. The method of claim 7, wherein the RRC signal is a dedicated RRC signal.

9. The method of claim 7, wherein the RRC signal is a broadcast RRC signal.

10. The method of claim 7, further comprising:

receiving, by the user equipment, a first message to transmit periodic UL SRS; and

transmitting, by the user equipment, periodic UL SRS in response to the received first message.

11. The method of claim 7, wherein the SPS message includes a reference to a signal characteristic.

12. The method of claim 7, further comprising:

transmitting, by the UE, a physical uplink shared channel (PUSCH) with a demodulation reference signal.