Method and apparatus for performing positioning based on various assistance data in mobile wireless communication system

A terminal in a wireless communication system, the terminal comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller configured to control the transceiver to:
• receive from a base station a first type1 assistance data, the first type1 assistance data includes a type1 identifier and one or more Positioning Reference Signal (PRS) resource set information;
• receive from the base station a type2 assistance data, the type2 assistance data includes a type2 identifier and one or more PRS resource set information, the type1 identifier and the type2 identifier correspond to different Information Elements (IEs);
• receive from the base station a type3 assistance data, the type3 assistance data includes a validity information and a second type1 assistance data;
• determine based on the validity information and New Radio (NR) Cell Global Identifier of serving cell, whether the second type1 assistance data is valid;
• receive from the base station a RRCRelease, the RRCRelease includes a SuspendConfig, the SuspendConfig includes information indicating that small data transmission is configured for Signaling Radio Bearer2 (SRB2);
• and
• transmit in RRC_INACTIVE via Dedicated Control Channel (DCCH) a ProvideLocationInformation.