Techniques for measuring a location of UE

• US 9,961,680 B2
• Filed: 05/27/2016
• Issued: 05/01/2018
• Est. Priority Date: 12/14/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lim, Suhwan, Lee, Sangwook, Jung, Manyoung, Lee, Daewon, Yang, Yoonoh
• Primary Examiner(s): Tran, Cong
• Application Number:
  US15/166,880
• Publication Number:
  US 20160286552A1
• Time in Patent Office: 704 Days
• Field of Search: 4554561, 4554563, 4554566, 455 6711, 4551151, 370328, 370338
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• 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 72/0446 Resources in time domain, e.g. slots or frames

Abstract

The present invention provides a method for measuring a location. The method comprises: receiving, by a User Equipment (UE) and from a serving cell, information on a bandwidth allocated for a positioning reference signal (PRS); receiving, by the User Equipment (UE) and from at least one or more neighbor cells, information on a bandwidth allocated for a PRS; determining whether there is a difference between the bandwidths; and measuring, by the UE and based on a result of the determination a timing difference between PRSs transmitted from the serving cell and the at least one or more neighbor cells.

Claims

1. A method for performing, by a user equipment (UE), reference signal time different (RSTD) measurement, comprising:

receiving, by the UE, a positioning reference signal (PRS) of a neighbor cell and a PRS of a reference cell; and

measuring, by the UE, a RSTD with a RSTD measurement accuracy based on the PRSs of the neighbor and reference cells,

wherein the RSTD is a relative timing difference between the neighbor cell and the reference cell, and

wherein the RSTD measurement accuracy is determined based on a minimum PRS bandwidth which is minimum of a bandwidth of a serving cell, a bandwidth for the PRS of the neighbor cell and a bandwidth for a PRS of the reference cell.

2. The method according to claim 1, further comprising:

receiving, by the UE, observed time difference of arrival (OTDOA) assistance data,

wherein the OTDOA assistance data includes information on the bandwidth for the PRS of the neighbor cell and information on the bandwidth for the PRS of the reference cell.

3. The method according to claim 2, wherein the OTDOA assistance data further includes information on a number of consecutive downlink subframes with the PRS of the neighbor cell and information on a number of consecutive downlink subframes with the PRS of the reference cell.

4. The method according to claim 1,

wherein the RSTD is measured in multiple downlink subframes, and

wherein a number of the multiple downlink subframes available for measuring the RSTD is associated with the minimum PRS bandwidth.

5. The method according to claim 1, wherein the reference cell is other than the serving cell.

6. The method according to claim 1, further comprising:

reporting, by the UE, the RSTD to a network for positioning of the UE.

7. A user equipment (UE) for performing reference signal time different (RSTD) measurement, comprising:

a transceiver, and

a controller configured to control the transceiver, configured to;

control the transceiver to receive a positioning reference signal (PRS) of a neighbor cell and a PRS of a reference cell; and

measure a RSTD with a RSTD measurement accuracy based on the PRSs of the neighbor and reference cells,

wherein the RSTD is a relative timing difference between the neighbor cell and the reference cell, and

wherein the RSTD measurement accuracy is determined based on a minimum PRS bandwidth which is a minimum of a bandwidth of a serving cell, a bandwidth for the PRS of the neighbor cell and a bandwidth for a PRS of the reference cell.

8. The UE according to claim 7,

wherein the processor is configured to control the receiver to further receive observed time difference of arrival (OTDOA) assistance data, and

wherein the OTDOA assistance data includes information on the bandwidth for the PRS of the neighbor cell and information on the bandwidth for the PRS of the reference cell.

9. The UE according to claim 8, wherein the OTDOA assistance data further includes information on a number of consecutive downlink subframes with the PRS of the neighbor cell and information on a number of consecutive downlink subframes with the PRS of the reference cell.

10. The UE according to claim 7,

wherein the processor is configured to measure the RSTD in multiple downlink subframes, and

wherein a number of the multiple downlink subframes available for measuring the RSTD is associated with the minimum PRS bandwidth.

11. The UE according to claim 7, wherein the reference cell is other than the serving cell.

12. The UE according to claim 7, wherein the processor is configured to control the RF unit to report the RSTD to a network for positioning of the UE.