Methods and apparatus for supporting collaborative positioning

A wireless transmit receive unit (WTRU) configured to serve as an Anchor user equipment (UE), the WTRU comprising:

• a transceiver in communication with a processor;
• wherein the transceiver and processor are configured to:
• receive from a collaborative WTRU via sidelink, a measurement report that includes an reference signal received power (RSRP) measurement made on an synchronization signal block (SSB) of a transmit reception point (TRP);
• determine, based on the RSRP measurement, whether the RSRP satisfies a preconfigured RSRP threshold;
• in response to determining that the RSRP satisfies the preconfigured RSRP threshold, select, from a preconfigured set of measurement gaps (MGs), an MG for the collaborative WTRU, wherein the selected MG is for enabling the collaborative WTRU to perform positioning reference signal (PRS) measurements;
• transmit information regarding activation of a measurement gap (MG) that is selected from a preconfigured set of MGs for the collaborative WTRU;
• transmit, to a network node, an indication the selected MG;
• receive, from the collaborative WTRU, a first PRS measurement report including a first PRS measurement performed during the selected MG;
• perform, by the WTRU, measurements of a PRS during the selected MG to determine a second PRS measurement;
• and
• transmit, to the network node, an aggregated measurement report that includes an indication of the first PRS measurement and an indication of the second PRS measurement, wherein the aggregated measurement report is associated with the selected MG and is configured to enable the network node to perform positioning of at least one of the WTRU or the collaborative WTRU.