A method for assisting a position determination of a user equipment, UE communicating over a shared communication medium in unlicensed spectrum, comprising: receiving, at the UE, positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal, PRS, configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, and wherein the plurality of secondary cells are in contention for the common set of positioning occasions; measuring, by the UE at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB, eNB for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; measuring, by the UE at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and sending, by the UE, the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server. receiving, at the UE, positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal, PRS, configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, and wherein the plurality of secondary cells are in contention for the common set of positioning occasions; measuring, by the UE at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB, eNB for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; measuring, by the UE at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and sending, by the UE, the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server.