Method for reporting measurement result for determining position in wireless communication system, and device therefor

• US 10,111,213 B2
• Filed: 03/22/2016
• Issued: 10/23/2018
• Est. Priority Date: 03/26/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Hyunho, Park, Hanjun, Kim, Bonghoe
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US15/325,964
• Publication Number:
  US 20170171857A1
• Time in Patent Office: 945 Days
• CPC Class Codes: G01S 13/16 using counters
• CPC Class Codes: G01S 13/765 with exchange of information between interrogator and responder
• CPC Class Codes: G01S 5/00 Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using active systems G01S13/00, G01S15/00, G01S17/00
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G01S 5/0273 using multipath or indirect path propagation signals in position determination
• 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: G01S 7/02 of systems according to group G01S13/00
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• 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 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method for reporting a measurement result for determining a position in a wireless communication system, according to one embodiment of the present invention, is performed by a terminal and may comprise the steps of: receiving positioning reference signal (PRS)-related information comprising a position identifier of each of a plurality of base stations; performing a measurement on the PRSs transmitted by each of the plurality of base stations; if the position identifier of each of the plurality of base stations are identical to each other, selecting at least one measurement result among the measurement results for the PRSs; and reporting the selected measurement result to a serving base station.

Claims

1. A method for reporting a measurement result for position determination in a wireless communication system, the method performed by a terminal and comprising:

measuring, by the terminal, an RSTD value for at least one positioning reference signal (PRS) transmitted from one or more base stations; and

reporting, by the terminal and to a network, a reference signal time difference (RSTD) report value which corresponds to the measured RSTD value and a range to which the measured RSTD value belongs, using a plurality of predefined RSTD mapping tables,

wherein the reported range is smaller than 1 Ts, wherein Ts is 1/30720 ms.

2. The method of claim 1, further comprising reporting, to the network, a capability of the UE related to the plurality of the RSTD mapping tables.

3. The method of claim 1, wherein if accuracy or quality of the RSTD value is equal to or smaller than a specific value or if uncertainty of the RSTD value is equal to or greater than a specific value, aperiodic PRS transmission by the one or more base stations is triggered.

4. The method of claim 3, wherein a specific time interval in which the aperiodic PRS is transmitted is indicated through a higher layer signal.

5. The method of claim 4, further comprising performing blind detection of an aperiodic PRS in the specific time interval.

6. The method of claim 3, wherein a specific subframe in which the aperiodic PRS is transmitted is indicated through a higher layer signal.

7. The method of claim 1, further comprising transmitting a request for an aperiodic PRS transmission to the one or more base stations.

8. A terminal reporting a measurement result for position determination in a wireless communication system, comprising:

a receiver;

a transmitter; and

a processor that controls the receiver and the transmitter;

wherein the processor measures an RSTD value for at least one positioning reference signal (PRS) transmitted from one or more base stations, and reports, to a network, a reference signal time difference (RSTD) report value which corresponds to the measured RSTD value and a range to which the measured RSTD value belongs, using a plurality of predefined RSTD mapping tables, and

wherein the reported range is smaller than 1 Ts, wherein Ts is 1/30720 ms.

9. The terminal of claim 8, further comprising reporting, to the network, a capability of the UE related to the plurality of the RSTD mapping tables.

10. The terminal of claim 8, wherein if accuracy or quality of the RSTD value is equal to or smaller than a specific value or if uncertainty of the RSTD value is equal to or greater than a specific value, aperiodic PRS transmission by the one or more base stations is triggered.

11. The terminal of claim 10, wherein a specific time interval in which the aperiodic PRS is transmitted is indicated through a higher layer signal.

12. The terminal of claim 11, further comprising performing blind detection of an aperiodic PRS in the specific time interval.

13. The terminal of claim 10, wherein a specific subframe in which the aperiodic PRS is transmitted is indicated through a higher layer signal.

14. The terminal of claim 8, wherein the processor transmits a request for an aperiodic PRS transmission to the one or more base stations.