Method and apparatus for requesting and receiving conditional positioning assistance data in mobile wireless communication system

A wireless device comprising:

• a transceiver,
• a memory, and
• a controller coupled to the transceiver and the memory, wherein the controller is configured to cause the wireless device to:
• transmit, by the wireless device to a Location Management Function (LMF), a first positioning protocol message, wherein the first positioning protocol message comprises an indication that a Positioning Reference Signal (PRS) data with validity area information is requested;
• receive, by the wireless device from the LMF, a second positioning protocol message, wherein the second positioning protocol message comprises the PRS data with validity area information, wherein the PRS data with validity area information comprises:
• a set of parameters for validity area;
• and
• one or more sets of PRS resource parameters;
• and
• transmit, by the wireless device to the LMF, a third positioning protocol message, wherein the third positioning protocol message comprises:
• a plurality of PRS resource identifiers;
• and
• a plurality of time differences between Transmission Reception Points (TRPs),
• wherein:
• the set of parameters for validity area comprises one or more cell specific identifiers;
• and
• each of the one or more cell specific identifiers consists of a base station identifier and a cell identifier.