Patent ID: 9237486
Filing Date: 2016-01-12
CPC Classification: H04W

Claim Text:
1. A method for performing handover in a first-type base station by a user equipment (UE) supporting an inter Radio Access Technology (interRAT) handover (HO) in a radio access system, the method comprising: searching for a second-type base station configured to use a communication scheme different from that of the first-type base station; receiving a master information block (MIB) and system information block (SIB) type1 from the searched second-type base station to obtain offset information (QrxlevminoffsetInterRAT) that is applied only to the InterRAT handover from the first-type base station to the second-type base station; determining whether or not a service from the searched second-type base station is available using equation Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset+OrxlevminoffsetInterRAT)−Pcompensation; performing a handover (HO) to the searched second-type base station if Srxlev ≧0; and receiving a service through the first-type base station, if Srxlev ≦0; wherein: