Reference point selection for OTDOA in a non-terrestrial network

An apparatus comprising processing circuitry coupled to a memory, the processing circuitry configured to perform operations comprising:

• determining a set of anchor points comprising one or more anchor points of a terrestrial type and one or more anchor points of a non-terrestrial type to be used in a positioning method for a user equipment (UE);
• selecting a subset of anchor points from the set of anchor points, wherein the subset anchor points consist of a same type of anchor point;
• selecting one anchor point from the subset of anchor points as a reference anchor point, wherein the reference anchor point is selected as a non-terrestrial anchor point;
• generating, for transmission to the UE, a positioning reference signal (PRS) configuration for each of the anchor points and indicating to the UE the reference anchor point, wherein the indicated reference anchor point is associated with a corresponding time stamp at which the UE is to perform received signal time difference (RSTD) measurements;
• and
• instructing each of the anchor points to transmit respective PRSs in accordance with the PRS configuration.