Back to results
US 2002/0177457 A1Published application
Radio communication system and frame synchronizing method between base stations
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorToshihisa Uchimoto
Life of this patent
Estimating the term…
Abstract
Before the phase of a frame signal is adjusted according to a PPS signal, internal clocks operating according to a line clock are adjusted by absolute base stations based on a time matching signal transmitted from a maintenance terminal.
Claims4
A radio communication system comprising:
- an absolute base station which adjusts the phase of a frame signal according to a GPS signal when a predetermined re-synchronization time is reached, and transmits the frame signal;
- and
- a subordinate base station which, upon reception of the frame signal from said absolute base station, adjusts the phase of an internal frame signal to coincide with the thus received phase of the frame signal.
- wherein said absolute base station adjusts an internal clock operating according to a line clock based on a time matching signal transmitted from a maintenance terminal before the adjustment of the phase of the frame signal according to the GPS signal is performed,
1 more element
The radio communication system comprising:
- an absolute base station which adjusts the phase of a frame signal according to a GPS signal when a predetermined re-synchronization time is reached, and transmits the frame signal;
- and
- a subordinate base station which, upon reception of the frame signal from said absolute base station, adjusts the phase of an internal frame signal to coincide with the thus received phase of the frame signal.
- wherein when it is detected that a call has been generated before the predetermined re-synchronization time is reached, said absolute base station hands over the call to said subordinate base station.
1 more element
Dependencies are inferred from the claim text.