Method for receiving or transmitting reference signal for location determination in wireless communication system and device for same

Patent metadata

Field	Value
Publication number	US-2018270784-A1
Application number	US-201615744548-A
Country	US
Kind code	A1
Filing date	Aug 9, 2016
Priority date	Aug 25, 2015
Publication date	Sep 20, 2018
Grant date	—

Abstract

A method for measuring a reference signal for location determination in a wireless communication system, according to an embodiment of the present invention, is performed by means of a terminal. The method comprises the steps of: receiving assistant data related to neighbor cells and a reference cell for location determination; by means of the assistant data, receiving a positioning reference signal (PRS) of a cell-specific reference signal (CRS) of the reference cell or the neighbor cells and calculating a reference signal time difference (RSTD) measurement value; and reporting the measurement value to a location server, wherein the assistant data can comprise information about the number of CRS antenna ports of the reference cell and neighbor cells, CRS cyclic prefix (CP) length information, or configuration information about multicast broadcast single frequency network (MBSFN) subframes.

First claim

1 - 20 . (canceled)

21 . A method of measuring a reference signal for positioning in a wireless communication system, the method performed by a terminal and comprising:
receiving assistant data related to a reference cell and one or more neighbor cells for positioning; calculating a reference signal time difference (RSTD) measurement value using a positioning reference signal (PRS) and a cell-specific reference signal (CRS) of the reference cell and the one or more neighbor cells based on the assistant data; and reporting the measurement value to a location server, wherein the assistant data includes at least one of CRS cyclic prefix (CP) length information of the reference cell and the one or more neighbor cells and multicast broadcast single frequency network (MBSFN) subframes configuration information of the reference cell and the one or more neighbor cells.

22 . The method of claim 21 , wherein the assistant data further includes the information on the number of CRS antenna ports indicates one selected from the group consisting of 1, 2, and 4.

23 . The method of claim 21 , wherein the CRS CP length information exists only when a CP length of a PRS of the reference cell is different from a CP length of a CRS of the reference cell or a CP length of a PRS of the one or more neighbor cells is different from a CP length of a CRS of the one or more neighbor cells.

24 . The method of claim 23 , wherein if the CRS CP length information is not included in the assistant data, the CP length of the PRS of the reference cell is identical to the CP length of the CRS of the reference cell or the CP length of the PRS of the one or more neighbor cells is identical to the CP length of the CRS of the one or more neighbor cells.

25 . The method of claim 21 , wherein the configuration information on the MBSFN subframes is provided in a unit of 1 or 4 radio frames.

26 . The method of claim 22 , wherein when the assistant data related to a specific cell of the reference cell and the one or more neighbor cells does not include all or a part of the information on the number of CRS antenna ports, the CRS CP length information, and the MBSFN subframes configuration information, a CRS is not used for the RSTD measurement for the specific cell.

27 . The method of claim 22 , wherein when the assistant data related to a specific cell of the reference cell and the one or more neighbor cells does not include all or a part of the information on the number of CRS antenna ports, the CRS CP length information, and the MBSFN subframes configuration information, the method further comprises calculating the RSTD measurement value by receiving a CRS only transmitted via a CRS port 0 of the specific cell, by receiving a CRS on a specific OFDM symbol only, which transmitted from the specific cell, or by receiving a PRS only, which transmitted from the specific cell.

28 . The method of claim 21 , wherein when a physical layer cell identifier (ID) field of the reference cell is identical to a physical cell ID of at least one neighbor cell among the one or more neighbor cells, a PRS and/or a CRS of the reference cell is used for measuring RSTD and RSTD measurement is not performed for the at least one neighbor cell.

29 . The method of claim 21 , wherein when a physical layer cell identifier (ID) field of the reference cell is identical to a physical cell ID of at least one neighbor cell among the one or more neighbor cells, a PRS and/or a CRS of the reference cell is used for measuring RSTD and only a PRS of the at least one neighbor cell is used for measuring RSTD.

30 . The method of claim 21 , wherein when physical layer cell identifiers (IDs) of a plurality of neighbor cells included in the assistant data are identical to each other, a PRS and/or a CRS of a predetermined neighbor cell among the plurality of the neighbor cells is used for measuring RSTD and RSTD measurement is not performed for the remaining neighbor cells other than the predetermined neighbor cell.

31 . The method of claim 21 , wherein when physical layer cell identifiers (IDs) of a plurality of neighbor cells included in the assistant data are identical to each other, a PRS and/or a CRS of a predetermined neighbor cell among the plurality of the neighbor cells is used for measuring RSTD and only PRS of the remaining neighbor cells other than the predetermined neighbor cell are used for measuring RSTD.

32 . The method of claim 21 , further comprising receiving information on a specific reference signal (RS), which is in a quasi-co-location (QCL) relation with the PRS of the reference cell or the one or more neighbor cells,
wherein the information on the specific RS is used for determining a channel property of the PRS, which is in the QCL relation with the RS.

33 . The method of claim 32 , wherein the information on the specific RS includes information on a specific antenna port of the RS, which is in the QCL relation with the PRS.

34 . A terminal for measuring a reference signal for positioning in a wireless communication system, the terminal comprising:
a transmitter; a receiver; and a processor that controls the transmitter and the receiver, wherein the processor controls the receiver to receive assistant data related to a reference cell and one or more neighbor cells for positioning, calculates a reference signal time difference (RSTD) measurement value using a positioning reference signal (PRS) and a cell-specific reference signal (CRS) of the reference cell and the one or more neighbor cells based on the assistant data, and reports the measurement value to a location server, and wherein the assistant data includes at least one of CRS cyclic prefix (CP) length information of the reference cell and the one or more neighbor cells and multicast broadcast single frequency network (MBSFN) subframes configuration information of the reference cell and the one or more neighbor cells.

Assignees

• Lg Electronics Inc

Inventors

• Lee Hyunho
• Park Hanjun
• Kim Kijun
• Park Jonghyun

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• G01S5/10

  Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308}) · CPC title

• H04W64/003 Primary

  locating network equipment · CPC title

• H04W64/00

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