Patent ID: 11956692
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
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.