Apparatuses and Methods therein for Positioning Measurements

Patent metadata

Field	Value
Publication number	US-2017150436-A1
Application number	US-201615111083-A
Country	US
Kind code	A1
Filing date	May 9, 2016
Priority date	May 13, 2015
Publication date	May 25, 2017
Grant date	—

Abstract

There is provided mechanisms for positioning of a wireless communications device in a wireless communications network, where the wireless communications network comprises a serving cell and neighbour cells. A method performed by the wireless communications device comprises obtaining information related to a cell selection process for selecting a cell to be used for computing a position of the wireless communications device. The method comprises measuring a measure of a signal associated with the cell to be selected. The method comprises selecting the cell to be used for computing the position of the wireless communications device based on the information related to the cell selection process. The method comprises computing a difference of the measures based on the selected cell.

First claim

1 - 29 . (canceled)

30 . A method performed, by a wireless communications device, for positioning of the wireless communications device in a wireless communications network, wherein the wireless communications network comprises a serving cell and neighbor cells, the method comprising:
obtaining information related to a cell selection process for selecting a cell to be used for computing a position of the wireless communications device; measuring a measure of a signal associated with the cell to be selected; selecting the cell to be used for computing the position of the wireless communications device based on the information related to the cell selection process; and computing a difference of the measures based on the selected cell.

31 . The method according to claim 30 , wherein the information related to the cell selection process is Selection Strategy Information (SSI).

32 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device a mechanism to select one or more of a reference cell and neighbor cells.

33 . The method according to claim 32 , wherein the mechanism is based on observed conditions at the wireless communications device at a time when the position of the wireless communications device is computed.

34 . The method according to claim 30 , wherein computing the position of the wireless communications device comprises:
computing a difference of the measure of the signal associated with the cell to be selected and a second measure of a second signal associated with a second cell.

35 . The method according to claim 34 , wherein the second cell is selected to be used for computing the position of the wireless communications device.

36 . The method according to claim 34 , wherein the difference of the measures is a Reference Signal Time Difference (RSTD).

37 . The method according to claim 30 , wherein the measure of the signal is a Time Of Arrival (TOA).

38 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device to select as reference cell that cell that corresponds to a minimum Time Of Arrival (TOA).

39 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device to select neighbor cells with the Time Of Arrival (TOA) in relation to a threshold.

40 . The method according to claim 30 , wherein the information related to the cell selection process is provided by a network node configured to assist the wireless communication device with positioning measurements.

41 . The method according to claim 30 , wherein the cell to be used for computing the position of the wireless communications device is selected based on the measure of the signal associated with the cell to be selected.

42 . The method according to claim 34 , further comprising:
providing the computed difference of the measures to the network node for the network node to compute the position of the wireless communications device based on the computed difference of the measures.

43 . The method according to claim 34 , further comprising:
computing the position of the wireless communications device based on the computed difference of the measures.

44 . The method according to claim 30 , further comprising:
providing the network node with information related to the cell selection process.

45 . The method according to claim 44 , wherein the information related to the cell selection process provided to the network node comprises an indication of the selected cell, or an indication of a selection strategy used to select the cell.

46 . The method according to claim 45 , wherein the selection strategy indicates to the wireless communications device to select neighbor cells based on its current serving cell.

47 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device which cells not to be candidates for selection as reference cell.

48 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device which cells are candidates for selection as reference cell.

49 . The method according to claim 30 , wherein the information related to the cell selection process indicates to the wireless communications device an ordered list of cells that are candidates for selection as reference cell, wherein the list is ordered according to priority of the cells.

50 . A method, performed by a network node, for positioning of a wireless communications device in a wireless communications network, wherein the wireless communications network comprises a serving cell and neighbor cells, the method comprising:
determining information related to a cell selection process for selecting a cell to be used for computing a position of the wireless communications device; providing the information related to the cell selection process to the wireless communications device; obtaining a difference of a measure of a signal associated with the cell to be selected and a second measure of a second signal associated with a second cell; and computing the position of the wireless communications device based on the difference of the measures.

51 . The method according to claim 50 , further comprising:
muting certain cell transmissions when other cells are transmitting.

52 . The method according to claim 51 , wherein the information related to the cell selection process indicates to the wireless communications device to select the cell based on a signal strength condition.

53 . A wireless communications device for positioning of the wireless communications device in a wireless communications network, wherein the wireless communications network comprises a serving cell and neighbor cells, the wireless communications device comprising:
a receiver configured to receive signals; and a processor configured to cause the wireless communications device to:
obtain information related to a cell selection process for selecting a cell to be used for computing a position of the wireless communications device;
measure a measure of a signal associated with the cell to be selected;
select the cell to be used for computing the position of the wireless communications device based on the information related to the cell selection process; and
compute a difference of the measures based on the selected cell.

54 . A network node for positioning of a wireless communications device in a wireless communications network, wherein the wireless communications network comprises a serving cell and neighbor cells, the network node comprising:
a transmitter configured to send signals; and a processor configured to cause the network node to:
determine information related to a cell selection process for selecting a cell to be used for computing a position of the wireless communications device;
provide the information related to the cell selection process to the wireless communications device;
obtain a difference of a measure of a signal associated with the cell to be selected and a second measure of a second signal associated with a second cell; and
compute the position of the wireless communications device based on the differe

Assignees

• ERICSSON TELEFON AB L M (publ)

Inventors

• Modarres Razavi Sara
• Blankenship Yufei
• Gunnarsson Fredrik
• Rydén Henrik
• Wang Meng
• Zaidi Ali

Classifications

• G01S5/0218

  Multipath in signal reception · CPC title

• H04W64/00 Primary

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

• H04W4/023

  using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds · CPC title

• G01S5/0215

  Interference · CPC title

• H04W48/20 Primary

  Selecting an access point · CPC title