Patent ID: 9374794
Filing Date: 2016-06-21
CPC Classification: H04W

Claim Text:
1. An apparatus in a communication system including first and second base stations, the apparatus operating as the first base station, the apparatus comprising: a timer; a timing determination unit configured to determine a first reference timing that is used as a reference timing for transmitting a downlink signal, based on a timing measured by the timer; a timing adjustment unit configured to adjust the first reference timing determined by the timing determination unit, to a second reference timing being used in the second base station; and a timing correction unit configured to correct a deviation of the first reference timing from the second reference timing, which has occurred after adjustment of the first reference timing by the timing adjustment unit, in accordance with a receiving timing of a preamble signal transmitted from a mobile station device to the second base station, wherein said timing correction unit is further configured to correct the deviation of the first reference timing in accordance with an average of receiving timings of preamble signals that have been transmitted from a plurality of mobile station devices to the second base station.