Air interface synchronization method

The present invention relates to a technical field LTE-A, discloses a method for air interface synchronization between a base station. In the case where the base station to be synchronized to monitor simultaneously a plurality of adjacent base stations can be sequentially according to the need for the CoMP, timing hop count number, size and CQI low latency criteria, such as different timing to select one neighboring base station for timing synchronization, i.e., , according to a certain priority order to determine a most appropriate synchronization source. The method applies to both the synchronization between base stations over the air interface from the initial synchronization establishment phase, to apply periodic synchronization holding stage. In addition, the Small? Cell case where dense arrangement, particularly prominent effect of this method.