The disclosure provides methods and devices thereof for wireless communication at a network side device and a user equipment (UE). The method includes: receiving information about a first UE; when the first UE is determined to be a first type of UE based on the information, multi-layer coding data for the first UE to obtain a first data stream and a second data stream about the first UE, performing a non-orthogonal multiple-access processing of the first and the second data streams of the first UE with data for a second UE and data for a third UE respectively, to obtain a first preprocessed data and a second preprocessed data, and pre-coding the first preprocessed data and second preprocessed data respectively, wherein the second UE and the third UE are a second type of UE. The method provided in the disclosure removes inter-beam and intra-beam interference and improves system efficiency.