Method for configuring channel state information reference signal, and base station

A base station, comprising:

• an obtaining module, configured to obtain location information of a user equipment;
• a first determining module, configured to determine, according to the location information obtained by the obtaining module, that the user equipment is located in a cross coverage area in which at least two nodes provide service, or in a centralized coverage area in which one node provides service;
• a second determining module, configured to:
• when the first determining module determines that the user equipment is located in the cross coverage area, determine, according to transmitting capabilities of the at least two nodes and a receiving capability of the user equipment, the number of ports for sending downlink signals to the user equipment;
• and
• a sending module, configured to send Channel State Information Reference Signal (CSI-RS) configuration information to the user equipment, wherein the CSI-RS configuration information comprises the number of ports that is determined by the second determining module.