Patent ID: 8929191
Filing Date: 2015-01-06
Classification: H04L,H04W

Abstract:
1. A base station device configured to perform wireless communication of an OFDM signal with a terminal device and including a built-in clock generator that generates an operating clock, in which accuracy of a carrier frequency of the OFDM signal is affected by accuracy of a clock frequency generated by the built-in clock generator, the base station device comprising: means for receiving a radio signal transmitted from another base station device while transmission to the terminal device is stopped; estimation means for determining, based on an OFDM signal received while transmission to the terminal device is stopped, an estimated value of a carrier frequency offset of the OFDM signal as synchronization mismatch between the base station device and another base station device; frequency correction means for correcting a carrier frequency of an OFDM signal to be transmitted to the terminal device, based on the estimated value; a storage unit for storing history information of synchronization mismatch between the base station device and another base station device; and a synchronization control unit for changing a cycle in which transmission to the terminal device is stopped, based on the history information of synchronization mismatch stored in the storage unit.