Methods for finite blocklength coding in wireless communication systems

Methods, apparatuses and systems for determining a channel quality indicator (CQI) and adjusting a modulation and coding scheme (MCS) for a downlink (DL) transmission are provided. In particular, a method implemented in a wireless transmit/receive unit (WTRU) includes receiving control information, including a codeword blocklength and a target BLER parameter for the DL transmission, measuring channel state information (CSI), determining a WTRU-based CQI based on the measured CSI, the codeword blocklength, and the target BLER parameter, and transmitting the WTRU-based CQI to a base station. The method may further include receiving a network-based CQI for the DL transmission, the network-based CQI being derived from the WTRU-based CQI, determining an MCS based on the network-based CQI, and receiving the DL transmission using the determined MCS.