NON-CONTENTION BASED RANDOM ACCESS METHOD AND APPARATUS

This application provides a method for contention-free random access, including: receiving a PDCCH order through a first demodulation reference signal DM-RS port, where the PDCCH order includes a first SSB index, and the PDCCH order is used to instruct to perform random access on a first RACH resource corresponding to the first SSB index by using a first preamble; sending, based on the PDCCH order, an MSG 1 on the first RACH resource by using the first preamble; and determining, based on the first DM-RS port, to receive an MSG 2 through a second DM-RS port, where the second DM-RS port has a QCL relationship with the first DM-RS port. According to this method, the MSG 2 does not need to be received by using a beam corresponding to an SSB index indicated by the PDCCH order, thereby avoiding failure of a terminal device to receive the MSG 2 due to misalignment between a transmit beam and a receive beam that correspond to the SSB index indicated by the PDCCH order.