Patent ID: 9351204
Filing Date: 2016-05-24
CPC Classification: H04L,H04W

Claim Text:
1. A method for controlling a handover from a first base station to a second base station by a user equipment that performs radio communication over a communication channel formed by carrier aggregation of a plurality of component carriers, the method comprising: transmitting, from the first base station to the user equipment, scheduling information on each component carrier according to a scheduling information transmission method that is either one of a straight scheduling method and a cross scheduling method; determining, by the first base station, whether a second component carrier is an extension carrier of a first component carrier to be operated according to the cross scheduling method, the second component carrier being equal to the first component carrier; changing, by the first base station, the scheduling information transmission method on the first component carrier from the cross scheduling method to the straight scheduling method on the first component carrier before performance of the handover; commanding, by the first base station when the second component carrier is the extension carrier of the first component carrier, the user equipment to perform the handover on the first component carrier from the first base station to the second base station according to the cross scheduling method; and commanding, by the first base station, the user equipment to perform the handover on the second component carrier from the first base station to the second base station according to the straight scheduling method.