US 12,135,379 B2
Method and apparatus for handling ephemeris information for a NTN cell in a wireless communication system
Oanyong Lee, Seoul (KR); and Sunghoon Jung, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Mar. 10, 2022, as Appl. No. 17/692,060.
Claims priority of application No. 10-2021-0032198 (KR), filed on Mar. 11, 2021.
Prior Publication US 2022/0291394 A1, Sep. 15, 2022
Int. Cl. G01S 19/25 (2010.01); H04W 24/10 (2009.01); H04W 76/20 (2018.01); H04W 84/06 (2009.01)
CPC G01S 19/258 (2013.01) [H04W 24/10 (2013.01); H04W 76/20 (2018.02); H04W 84/06 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method performed by a wireless device in a wireless communication system, the method comprising,
receiving, from a network, an ephemeris information related to a non-terrestrial network cell, wherein the ephemeris information includes information related to service time for the non-terrestrial network;
performing a first measurement for Reference Signal Received Power (RSRP) value and/or Reference Signal Received Quality (RSRQ) value for the non-terrestrial network cell within the service time;
based on that the RSRP value and/or RSRQ value for the non-terrestrial network cell is less than a threshold value, determining that (i) measurement for the non-terrestrial network cell is not available within the service time for the non-terrestrial network cell and (ii) that the ephemeris information is not valid; and
transmitting, to the network, (i) first information informing that the ephemeris information is not valid and (ii) second information informing whether the measurement for the non-terrestrial network cell is available outside the service time for the non-terrestrial network cell or not,
wherein the second information is determined based on a second measurement for RSRP value and/or RSRQ value for the non-terrestrial network cell which is performed outside the service time for the non-terrestrial network cell.