Non-stationary carrier-phased positioning
Systems, methods, apparatuses, and computer program products for non-stationary carrier-phased positioning (CPP). A method may include receiving an indication to transmit a sounding reference signal or a carrier phase positioning measurement. The indication may include at least a phase pre-compensation on the sounding reference signal transmission or a correction of the carrier phase positioning measurement based at least on a Doppler shift. The method may also include performing, at a user equipment, the phase pre-compensation for the sounding reference signal transmission, or the correction of the carrier phase positioning measurement. The method may further include transmitting, by the user equipment, the sounding reference signal with the phase pre-compensation or the carrier phase positioning measurement.
1 . A user equipment (UE) apparatus, comprising:
at least one processor; and
at least one memory storing instructions, wherein the instructions, when executed by the at least one processor, cause the apparatus at least to
receive an indication to transmit a sounding reference signal or a carrier phase positioning measurement, wherein the indication comprises at least a phase pre-compensation on the sounding reference signal transmission or a correction of the carrier phase positioning measurement based at least on a Doppler shift;
perform the phase pre-compensation for the sounding reference signal transmission, or the correction of the carrier phase positioning measurement;
transmit the sounding reference signal with the phase pre-compensation or the carrier phase positioning measurement, wherein performing the phase pre-compensation comprises applying a frequency-domain pre-compensation to the Doppler shift per network element of the plurality of network elements, and wherein the transmission of the sounding reference signal to the plurality of network elements comprises the frequency-domain pre-compensation;
receive a reference signal from a plurality of network elements at a first time period within a time window;
determine Doppler shift data for the plurality of network elements based on the reference signal received at the first time period; and
transmit the Doppler shift data for the plurality of network elements to another network element, wherein the sounding reference signal is transmitted to the plurality of network elements at a second time period within the time window;
transmit, to a location management function, a report indicating whether the phase pre-compensation is performed in a frequency-domain or a phase-domain; and
receive an indication to provide user equipment data to a location management function, wherein the user equipment data comprises a movement data of the apparatus, Doppler shift of the apparatus, and movement data of the apparatus during the sounding reference signal transmission.