Mobile communications system, handover controlling method, radio network controller, and mobile terminal

摘要

A radio network controller 3 is so constructed as to divide a plurality of base stations 2 into a group of base stations included in an E-DCH active set and a group of base stations included in an active set for soft handovers (i.e., a prior art active set) according to a status of reception of data in each of the plurality of base stations 2.