Clock synchronization system and method for base station

摘要

The present application discloses a system and a method for clock synchronization of base stations. In the system for clock synchronization of base stations, a Global Positioning System (GPS) receiver on a main control board of a base station is connected to a GPS antenna feeder; the GPS receiver connected to the GPS antenna feeder is connected to a Phase-Locked Loop (PLL) on the present main control board and a PLL on other main control board; the main control boards are connected through a judgment line.

主权项

1. A system for clock synchronization of base stations, including a plurality of base stations in a machine frame, each base station having a main control board, comprises,
the main control board of each base station is provided with a Global Positioning System (GPS) receiver, a Phase-Locked Loop (PLL) and an Oven Controlled Crystal Oscillator (OCXO); the GPS receiver on the main control board of one of the base stations is connected to a GPS antenna feeder; the GPS receiver connected to the GPS antenna feeder is connected to a PLL on the present main control board and a PLL on the main control board of other base stations; and the main control boards of the base stations are connected by a judgment line, and wherein, the GPS receiver connected to the GPS antenna feeder is configured to send a clock signal to the PLL on the present main control board and the PLL on the main control board of other base stations, and the clock signal is processed to form a clock reference signal corresponding to each base station by the PLL and the OCXO on each main board; and the judgment line is configured to provide each base station with respective states in which other base stations use clock reference signals, to each base station determining whether to output the clock reference signal of the present base station according to the respective states in which other base stations use clock reference signals.