US Patent 11343857 Random access in a non-terrestrial network

Systems, methods, and devices for random access to a communications network by a wireless transmit/receive unit (WTRU). In some implementations, the WTRU receives random access response (RAR) configuration information. The WTRU determines a time offset for a RAR window, based on a minimum round trip time (RTT) between the WTRU and a non-terrestrial network device. The WTRU determines a length of the RAR window. the WTRU monitors a physical downlink control channel (PDCCH) from the non-terrestrial network device during the RAR window based on the time offset and the length of the RAR window.