Abstract: An object of this invention is to realize stable control in a time synchronizer utilizing GPS satellites so that a long operational time is ensured for the system even if any of the GPS satellites becomes unable to be captured. When a base station becomes unable to capture any of the GPS satellites and if there is a mobile station which is in a relationship capable of performing handover from the base station to another base station, a radio wave input/output unit receives a frame transmitted by the other base station being able to normally receive the GPS satellite via the mobile station, and a frame timing detection unit estimates a deviation from the UTC. A 1PPS correction circuit unit transmits a signal to correct the deviation, and a control unit causes a GPS receiver to change and adjust the frame timing. A frame generation unit generates a frame based on the corrected 1PPS signal.

Abstract: An object of this invention is to realize stable control in a time synchronizer utilizing GPS satellites so that a long operational time is ensured for the system even if any of the GPS satellites becomes unable to be captured. When a base station becomes unable to capture any of the GPS satellites and if there is a mobile station which is in a relationship capable of performing handover from the base station to another base station, a radio wave input/output unit receives a frame transmitted by the other base station being able to normally receive the GPS satellite via the mobile station, and a frame timing detection unit estimates a deviation from the UTC. A 1 PPS correction circuit unit transmits a signal to correct the deviation, and a control unit causes a GPS receiver to change and adjust the frame timing. A frame generation unit generates a frame based on the corrected 1 PPS signal.