Mobile terminal in mobile communication system, transmission timing adjustment apparatus and method for adjusting transmission timing

摘要

A mobile terminal includes: a detection unit (12) configured to detect reception timing of radio frames transmitted from first and second base stations; and an adjustment unit (15) configured to adjust transmission timing of a radio frame transmitted from the mobile terminal to the first base station so that a predetermined relationship between transmission timing of a radio frame transmitted from the first base station to the mobile terminal and the reception timing of a radio frame received by the first base station is satisfied, wherein the adjustment unit (15) adjusts transmission timing of a radio frame transmitted from the mobile terminal to the second base station based on the adjusted transmission timing to the first base station and a difference between the reception timing of a radio frame transmitted from the first base station and the reception timing of a radio frame transmitted from the second base station detected by the detection unit. The above structure is applied, for example, to handover in an LTE system so as to avoid the need for a RACH procedure during handover.