Inter-station synchronization method, base station, and control network element

An inter-station synchronization method, comprising:

• listening, by a first synchronization station, to a first reference signal sent by a source station;
• sending a second reference signal to the source station;
• obtaining, by the first synchronization station, a time difference Δt1 between the first synchronization station and the source station, wherein the time difference Δt1 is obtained according to a first time parameter of the first reference signal and a second time parameter of the second reference signal, the first time parameter comprises a transmit time point t1 and a receive time point t2 of the first reference signal, and the second time parameter comprises a transmit time point t3 and a receive time point t4 of the second reference signal, wherein obtaining, by the first synchronization station, the time difference Δt1 between the first synchronization station and the source station comprises at least one of:
• receiving, by the first synchronization station, the first time parameter and the second time parameter;
• or
• receiving, by the first synchronization station, the time difference Δt1;
• and
• adjusting, by the first synchronization station, current time of the first synchronization station according to the time difference Δt1.