An apparatus and system for determining positioning measurement accuracy are described. A UE receives positioning reference signals (PRS) from a reference cell and a neighbor cell and reference signal time difference (RSTD) measurements based on the PRS. RSTD and other PRS measurement results based on the reference and neighbor cells have RSTD and other PRS measurement accuracy requirements, that depend on bandwidth (BW), subcarrier spacing (SCS), and repetition factor of the PRS.