Embodiments relate to positioning of a user equipment in a communications network. A method in a user equipment for performing positioning measurement comprises receiving positioning assistance data from a positioning node. The positioning assistance data comprises a plurality of reference cells, wherein each reference cell may be associated with at least one respective frequency, and a set of neighbor cells comprising at least one neighbor cell. The method further comprises, for each reference cell comprised in the plurality of reference cells, identifying a respective associated set of neighbor cells, wherein the reference cell and the respective associated set of neighbor cells define a group. Furthermore, the method comprises performing at least one positioning measurement using the positioning assistance data for each respective identified group.