A processing method for downlink power regulation of a downlink channel, a reference signal and a discovery signal, by a base station controlling a small cell, the processing method comprising: transmitting a discovery signal, DS, for enabling a terminal to discover the small cell; receiving from a terminal discovery information confirming the reception of the DS and a measurement report on the discovery signal; configuring a power parameter based on the received discovery information and the measurement report, and determining a transmit power of the downlink channel, the reference signal and the DS based on the power parameter; wherein in activated state: the transmit power of the downlink channel and the reference signal are reduced to serve the terminals of the small cell, while the transmit power of the DS is kept unchanged to ensure discovery of the small cell in response to the small cell not being heavily loaded and terminals being concentrated in a certain area of the small cell, and the transmit power of the DS is reduced to prevent discovery of the cell by terminals on the edge of the small cell, while the transmit power of the downlink channel and the reference signal are kept unchanged in response to the small cell being heavily loaded; notifying the power parameter to the terminal and/or a neighboring small cell or a macrocell. sending the downlink channel, the reference signal and the DS with the determined transmit powers. transmitting a discovery signal, DS, for enabling a terminal to discover the small cell; receiving from a terminal discovery information confirming the reception of the DS and a measurement report on the discovery signal; configuring a power parameter based on the received discovery information and the measurement report, and determining a transmit power of the downlink channel, the reference signal and the DS based on the power parameter; wherein in activated state: the transmit power of the downlink channel and the reference signal are reduced to serve the terminals of the small cell, while the transmit power of the DS is kept unchanged to ensure discovery of the small cell in response to the small cell not being heavily loaded and terminals being concentrated in a certain area of the small cell, and the transmit power of the DS is reduced to prevent discovery of the cell by terminals on the edge of the small cell, while the transmit power of the downlink channel and the reference signal are kept unchanged in response to the small cell being heavily loaded; notifying the power parameter to the terminal and/or a neighboring small cell or a macrocell. sending the downlink channel, the reference signal and the DS with the determined transmit powers. the transmit power of the downlink channel and the reference signal are reduced to serve the terminals of the small cell, while the transmit power of the DS is kept unchanged to ensure discovery of the small cell in response to the small cell not being heavily loaded and terminals being concentrated in a certain area of the small cell, and the transmit power of the DS is reduced to prevent discovery of the cell by terminals on the edge of the small cell, while the transmit power of the downlink channel and the reference signal are kept unchanged in response to the small cell being heavily loaded; notifying the power parameter to the terminal and/or a neighboring small cell or a macrocell. sending the downlink channel, the reference signal and the DS with the determined transmit powers.