1. A method for downlink multi-user multiple-input multiple-output (MU-MIMO) communication in a wireless local area network (WLAN) performed by a communication apparatus, the method comprising: measuring characteristics of an environment of a wireless network formed based on the communication apparatus, the characteristics including a Signal to Noise Ratio (SNR) value; determining a predicted opportunistic interference alignment (OIA) throughput of an OIA scheme using a frame period and a sum-rate based on the measured characteristics; determining a predicted iterative IA throughput of an iterative IA scheme using a frame period and a sum-rate based on the measured characteristics; comparing the predicted OIA throughput to the predicted iterative IA throughput; when the predicted OIA throughput is greater than the predicted iterative IA throughput, selecting the OIA throughput as an IA scheme; when the predicted iterative IA throughput is greater than the predicted OIA throughput, selecting the IA throughput as an IA scheme; when the predicted OIA throughput is equal to the predicted iterative IA throughput, selecting the OIA throughput or the iterative IA throughput as an IA scheme, and performing wireless communication with a user terminal in the WLAN using the selected IA scheme with the greater predicted throughput.