An information processing method, applied to a multiple-input multiple-output, MIMO communications system, wherein a plurality of data demodulation reference signal ports is allocated to a user equipment, UE, by a plurality of base stations and the method comprises: obtaining, by a network side device, in a scheduled time-frequency resource, information about whether the plurality of data demodulation reference signal ports allocated to the UE meet a port relationship, wherein the port relationship is met when signals sent by any two or more ports of the plurality of data demodulation reference signal ports experience same or similar large scale properties; and sending, by the network side device, an indication of the information about whether the port relationship is met, so that for at least two data demodulation reference signal ports of the plurality of data demodulation reference signal ports that meet the port relationship, the UE performs channel estimation, frequency offset estimation, or demodulation by using same parameters, and for data demodulation reference signal ports of the plurality of data demodulation reference signal ports that do not meet the port relationship the UE separately obtains parameters and performs channel estimation, frequency offset estimation, or demodulation by using different parameters; wherein the obtaining information about whether the plurality of data demodulation reference signal ports allocated to the UE meet the port relationship comprises: performing, by the network side device, in the scheduled time-frequency resource, measurement and determining if the port relationship is met on the plurality of data demodulation reference signal ports allocated to the UE; wherein the sending an indication of the information about whether the port relationship is met comprises: explicitly sending the indication of the information about whether the port relationship is met. obtaining, by a network side device, in a scheduled time-frequency resource, information about whether the plurality of data demodulation reference signal ports allocated to the UE meet a port relationship, wherein the port relationship is met when signals sent by any two or more ports of the plurality of data demodulation reference signal ports experience same or similar large scale properties; and sending, by the network side device, an indication of the information about whether the port relationship is met, so that for at least two data demodulation reference signal ports of the plurality of data demodulation reference signal ports that meet the port relationship, the UE performs channel estimation, frequency offset estimation, or demodulation by using same parameters, and for data demodulation reference signal ports of the plurality of data demodulation reference signal ports that do not meet the port relationship the UE separately obtains parameters and performs channel estimation, frequency offset estimation, or demodulation by using different parameters; wherein the obtaining information about whether the plurality of data demodulation reference signal ports allocated to the UE meet the port relationship comprises: performing, by the network side device, in the scheduled time-frequency resource, measurement and determining if the port relationship is met on the plurality of data demodulation reference signal ports allocated to the UE; wherein the sending an indication of the information about whether the port relationship is met comprises: explicitly sending the indication of the information about whether the port relationship is met. performing, by the network side device, in the scheduled time-frequency resource, measurement and determining if the port relationship is met on the plurality of data demodulation reference signal ports allocated to the UE; wherein the sending an indication of the information about whether the port relationship is met comprises: explicitly sending the indication of the information about whether the port relationship is met.