Cell handover method and apparatus

A cell handover method, wherein the method comprises:

• receiving, by a first base station to which a first cell belongs, a measurement report obtained by user equipment (UE) at the first cell, wherein the measurement report includes signal quality of the first cell, signal quality of a second cell, and an identifier and signal quality of at least one target cell that can cover the UE;
• selecting, by the first base station, a target cell for the UE from the at least one target cell when the first base station determines to perform handover for the UE based on the measurement report, wherein the first cell is a primary carrier cell of the UE;
• transferring, by the first base station, a radio bearer (RB) of a service between the first base station and the UE to a second base station to which the second cell belongs, wherein the second cell is a secondary carrier cell of the UE;
• sending, by the first base station to the UE, a notification that the RB is transferred to the second base station, wherein the notification carries an identifier of the RB transferred to the second base station and an identifier of the second cell, wherein before the UE is handed over to the target cell, the RB between the UE and the first base station is transferred to the second base station to which the second cell belongs;
• and
• handing over, by the first base station, the UE to the selected target cell when the UE maintains the RB transferred to the second base station with the second cell to transmit the service.