A method for observed time difference of arrival, OTDOA, positioning, comprising: Receiving, from a serving cell of a first network that belongs to a New Radio, NR, network, assistance data for measuring time difference of arrival of positioning reference signals, PRSs, received from a plurality of neighboring cells of a second network that belongs to a Long Term Evolution, LTE, network, including a first neighboring cell ; wherein the assistance data includes a system frame number, SFN, offset of the first neighboring cell with respect to the serving cell , and a frame timing difference between the first neighboring cell with respect to the serving cell , wherein when frame boundaries of the serving cell and the first neighboring cell are not synchronized, the frame timing offset does not equal zero; determining an SFN timing of the first neighboring cell based on the SFN offset of the first neighboring cell ; determining timings of PRS positioning occasions of one or more of the plurality of neighboring cells based on the SFN timing of the first neighboring cell and the frame timing difference; and the first network and the second network belong to the different types of networks, the different types of networks correspond to different communication protocols; wherein the method further comprising: transmitting, to a gNB base station of the NR network, a measurement request for a set of measurement gaps for measuring the PRSs, the measurement request including timings of the set of measurement gaps that match the timings of the PRS positioning occasions of the one or more of the plurality of neighboring cells . Receiving, from a serving cell of a first network that belongs to a New Radio, NR, network, assistance data for measuring time difference of arrival of positioning reference signals, PRSs, received from a plurality of neighboring cells of a second network that belongs to a Long Term Evolution, LTE, network, including a first neighboring cell ; wherein the assistance data includes a system frame number, SFN, offset of the first neighboring cell with respect to the serving cell , and a frame timing difference between the first neighboring cell with respect to the serving cell , wherein when frame boundaries of the serving cell and the first neighboring cell are not synchronized, the frame timing offset does not equal zero; determining an SFN timing of the first neighboring cell based on the SFN offset of the first neighboring cell ; determining timings of PRS positioning occasions of one or more of the plurality of neighboring cells based on the SFN timing of the first neighboring cell and the frame timing difference; and the first network and the second network belong to the different types of networks, the different types of networks correspond to different communication protocols; wherein the method further comprising: transmitting, to a gNB base station of the NR network, a measurement request for a set of measurement gaps for measuring the PRSs, the measurement request including timings of the set of measurement gaps that match the timings of the PRS positioning occasions of the one or more of the plurality of neighboring cells . <EOS>