Method of correcting time of departure in observed time difference of arrival positioning
AssigneeNokia Technologies Oy
InventorDiomidis MICHALOPOULOS
Life of this patent
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Abstract
A method, apparatus, and a computer-readable storage medium are provided for correcting time of departure of positioning reference signals (PRRs) used in estimating location of a user equipment in wireless networks. In one example implementation, the method may include receiving, by a user equipment (UE), one or more positioning reference signals (PRSs) from each cell of a plurality of cells. The example method may further include determining, by the user equipment (UE), arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells; and transmitting, by the user equipment (UE), reference signal time difference (RSTD) values.
Claims23
A method, comprising:
- receiving, by a user equipment (UE), one or more positioning reference signals (PRSs) from each cell of a plurality of cells, a second positioning reference signal (PRS) of the one or more positioning reference signals (PRSs) from a cell of the plurality of cells includes a second time of departure of the second positioning reference signal (PRS), the second time of departure being relative to a first time of departure of a first reference positioning reference signal (PRS) received from the cell, the first reference positioning reference signal (PRS) being a reference positioning reference signal (PRS) of the plurality of one or more positioning reference signals (PRSs) that is transmitted first from the cell;
- determining, by the user equipment (UE), arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells;
- and
- transmitting, by the user equipment (UE), reference signal time difference (RSTD) values, a reference signal time difference (RSTD) value of the reference signal time difference (RSTD) values being determined based at least on the first and second times of departure and the arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells.
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to perform operations comprising:
- receiving one or more positioning reference signals (PRSs) from each cell of a plurality of cells, a second positioning reference signal (PRS) of the one or more positioning reference signals (PRSs) from a cell of the plurality of cells includes a second time of departure of the second positioning reference signal (PRS), the second time of departure being relative to a first time of departure of a first reference positioning reference signal (PRS) received from the cell, the first reference positioning reference signal (PRS) being a reference positioning reference signal (PRS) of the plurality of one or more positioning reference signals (PRSs) that is transmitted first from the cell;
- determining arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells;
- and
- transmitting reference signal time difference (RSTD) values, a reference signal time difference (RSTD) value of the reference signal time difference (RSTD) values being determined based at least on the first and second times of departure and the arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells.
A computer program embodied on a non-transitory computer-readable medium, said computer program comprising program instructions which, when loaded into an apparatus, cause the apparatus to execute a method, comprising:
- receiving, by a user equipment (UE), one or more positioning reference signals (PRSs) from each cell of a plurality of cells, a second positioning reference signal (PRS) of the one or more positioning reference signals (PRSs) from a cell of the plurality of cells includes a second time of departure of the second positioning reference signal (PRS), the second time of departure being relative to a first time of departure of a first reference positioning reference signal (PRS) received from the cell, the first reference positioning reference signal (PRS) being a reference positioning reference signal (PRS) of the plurality of one or more positioning reference signals (PRSs) that is transmitted first from the cell;
- determining, by the user equipment (UE), arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells;
- and
- transmitting, by the user equipment (UE), reference signal time difference (RSTD) values, a reference signal time difference (RSTD) value of the reference signal time difference (RSTD) values being determined based at least on the first and second times of departure and the arrival times of positioning reference signals (PRSs) from different cells of the plurality of cells.
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Dependencies are inferred from the claim text.