A multi-bit phase change memory cell including a stack of a plurality of conductive layers and a plurality of phase change material layers, each of the phase change material layers disposed between a corresponding pair of conductive layers and having electrical resistances that are different from one another. According to one example of the disclosure, a video coding method comprise partitioning a coding unit into multiple prediction units, and determining a transform partition for each of the prediction units, wherein at least one transform partition is a non-square partition. It consists of a method and apparatus that can be implemented in access points and subscriber wireless transmitreceive units, in order to allow an AP to initiate re-association of a WTRU to itself or a different AP.