Method and apparatus for selecting non-terrestrial network cell

A user equipment (UE) for selecting a non- terrestrial network (NTN) cell, the UE comprising:

• a-memory, comprising one or more storage media, storing instructions;
• a communicator including an electronic circuit;
• and
• at least one processor, operably connected to the memory and the communicator,
• wherein the instructions, when executed by the at least one processor individually or collectively, cause the UE to:
• receive one or more system parameters including ephemeris information from a serving NTN cell and a plurality of NTN neighbor cells,
• determine trajectory information about the plurality of NTN neighbor cells based on the one or more received system parameters,
• determine trajectory information about the UE based on global positioning system (GPS) information of the UE;
• and
• select the NTN cell among the plurality of NTN neighbor cells to perform at least one of a cell reselection or a conditional hand over (CHO), wherein the selected NTN cell is determined based on the determined trajectory information about the plurality of NTN neighbor cells, and the determined trajectory information about the UE.

One or more non-transitory computer readable storage media storing one or more computer programs including computer-executable instructions that, when executed by one or more processors of a user equipment (UE) individually or collectively, cause the UE to perform operations, the operations comprising:

• receiving one or more system parameters including ephemeris information from a serving NTN cell and a plurality of NTN neighbor cells;
• determining trajectory information about the plurality of NTN neighbor cells based on the one or more received system parameters;
• determining trajectory information about the UE based on global positioning system (GPS) information of the UE;
• and
• selecting the NTN cell among the plurality of NTN neighbor cells to perform at least one of a cell reselection or a conditional hand over (CHO), wherein the selected NTN cell is determined based on the determined trajectory information about the plurality of NTN neighbor cells, and the determined trajectory information about the UE.