US 11,956,692 B2
Relaxation of mobility condition based on serving cell quality
Sangwon Kim, Seoul (KR); Youngdae Lee, Seoul (KR); Sunghoon Jung, Seoul (KR); and Hongsuk Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Oct. 17, 2022, as Appl. No. 17/967,210.
Application 17/967,210 is a continuation of application No. 17/692,791, filed on Mar. 11, 2022.
Application 17/692,791 is a continuation of application No. 16/800,990, filed on Feb. 25, 2020, granted, now 11,310,715, issued on Apr. 19, 2022.
Claims priority of application No. 10-2019-0022706 (KR), filed on Feb. 26, 2019; and application No. 10-2019-0022713 (KR), filed on Feb. 26, 2019.
Prior Publication US 2023/0055492 A1, Feb. 23, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 36/00 (2009.01); H04W 36/08 (2009.01); H04W 36/32 (2009.01); H04W 48/20 (2009.01); H04W 74/0833 (2024.01); H04W 76/11 (2018.01); H04W 80/02 (2009.01)
CPC H04W 36/32 (2013.01) [H04W 36/00835 (2018.08); H04W 36/0085 (2018.08); H04W 36/08 (2013.01); H04W 48/20 (2013.01); H04W 74/0833 (2013.01); H04W 76/11 (2018.02); H04W 80/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method performed by a User Equipment (UE) adapted to operate in a wireless communication system, the method comprising:
receiving, from a network, a Conditional Handover (CHO) configuration including one or more conditions of one or more candidate cells,
wherein the one or more conditions are based on any one of (i) a first event in which a candidate cell becomes amount of an offset better than the serving cell, or (ii) a second event in which the serving cell becomes worse than a first threshold and a candidate cell becomes better than a second threshold,
wherein the CHO configuration includes one or more configurations of each of the one or more candidate cells;
evaluating the one or more conditions of each of the one or more candidate cells;
considering the first event or the second event to be not fulfilled;
detecting a radio link failure upon expiry of a timer in the serving cell,
wherein the timer starts upon receiving N number of consecutive out-of-sync indications for the serving cell from lower layers;
performing a cell selection; and
(i) if the cell selection is triggered by detecting the radio link failure, and (ii) if a selected cell is one of the one or more candidate cells, applying a configuration associated to the selected cell,
wherein the selected cell is selected based on fulfilling a cell selection criterion S,
wherein the cell selection criterion S is different from the one or more conditions, and
wherein the cell selection criterion S is fulfilled when:
Srxlev>0 AND Squal>0
where:
Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset)−Pcompensation−Qoffsettemp
Squal=Qqualmeas−(Qqualmin+Qqualminoffset)−Qoffsettemp
where:
Srxlev denotes a cell selection reception (RX) level value, Qrxlevmeas denotes a measured cell RX level value, Qrxlevmin denotes a minimum required RX level value in a cell, Qrxlevminoffset denotes an offset to the Qrxlevmin, Pcompensation denotes a parameter related to additionalPmax, Qoffsettemp denotes an offset temporarily applied to the cell, Squal denotes a cell selection quality value, Qqualmeas denotes a measured cell quality value, Qqualmin denotes a minimum required quality level value in the cell, and Qqualminoffset denotes an offset to the Qqualmin.