Network listening method and device

A clock synchronization method, comprising:

• receiving, by a second base station, a clock synchronization signal from a first base station by using a time-frequency pattern of the clock synchronization signal, wherein the clock synchronization signal is a sequence having a fixed time-frequency pattern, the time-frequency pattern of the clock synchronization signal is the fixed time-frequency pattern, and the fixed time-frequency pattern comprises a time-frequency pattern of a positioning reference signal (PRS) and a time-frequency pattern of a cell-specific reference signal (CRS), wherein when the method is performed in a frequency division duplex (FDD) system, the time-frequency pattern of the clock synchronization signal is located in a resource, the resource comprises a subframe whose subframe index number is 1 and/or a subframe whose subframe index number is 6 in the FDD system;
• and
• performing, by the second base station, clock synchronization between the second base station and the first base station according to the clock synchronization signal.

A first base station, comprising:

• a processor, configured to determine a clock synchronization signal and a time-frequency pattern of the clock synchronization signal, wherein the clock synchronization signal is a sequence having a fixed time-frequency pattern, the time-frequency pattern of the clock synchronization signal is the fixed time-frequency pattern, and the fixed time-frequency pattern comprises a time-frequency pattern of a positioning reference signal (PRS) and a time-frequency pattern of a cell-specific reference signal (CRS);
• and
• a transmitter, configured to transmit, by using the time-frequency pattern of the clock synchronization signal determined by the processor, the clock synchronization signal to a second base station for clock synchronization between the second base station and the first base station, wherein when the method is performed in a frequency division duplex (FDD) system, the time-frequency pattern of the clock synchronization signal is located in a first resource, the first resource comprises a subframe whose subframe index number is 1 and/or a subframe whose subframe index number is 6 in the FDD system.

A second base station, comprising:

• a receiver, configured to receive a clock synchronization signal from a first base station by using a time-frequency pattern of the clock synchronization signal, wherein the clock synchronization signal is a sequence having a fixed time-frequency pattern, the time-frequency pattern of the clock synchronization signal is the fixed time-frequency pattern, and the fixed time-frequency pattern comprises a time-frequency pattern of a positioning reference signal (PRS) and a time-frequency pattern of a cell-specific reference signal (CRS), wherein when the method is performed in a frequency division duplex (FDD) system, the time-frequency pattern of the clock synchronization signal is located in a resource, the resource comprises a subframe whose subframe index number is 1 and/or a subframe whose subframe index number is 6 in the FDD system;
• and
• a processor, configured to perform clock synchronization between the second base station and the first base station according to the clock synchronization signal received by the receiver.