Abstract: The purpose of the present invention is to provide a radio communication system capable of easily estimating the position of a base station device when the base station device is movable and capable of using the result of the estimation easily estimating the position of a mobile terminal device and a mobile terminal device a base station device and a management device which are provided therein. In addition to a UE E SMLC (264) used to estimate the position of a target UE (261) an eNB E SMLC (287) used to estimate the position of an eNB is provided. Positional information relating to the eNB in an E UTRAN is estimated by the eNB E SMLC (287) and on the basis of the estimated positional information processing for example the movement management of a target eNodeB_s1 (285) and a target eNodeB_uu (282) is performed.