Mobility control method mitigating inter cell interference and base stations which adopt the method

摘要

Interference applied to neighbor cells during terminal handovers can be reduced in wireless communication systems containing base stations 201 having different cell sizes. A serving cell makes handover judgment criteria easier based on pre-acquired cell size information on its own cell and cell size information of neighbor cells in order to facilitate terminal handovers from a base station 201 with a large cell size to a base station 201 with a small cell size. The serving cell finds evaluation function values based on the propagation state (e.g. reference signal received power) between the terminal 203 and target cell, and the interference and load information exchanged between the base stations 201, and selects the terminal 203 for handover by comparing the evaluation function value with the handover criteria value. The system selects a target cell having a good effect in lowering interference such as a cell with large reference signal received power acquired from a terminal 203, to serve as the handover destination.