Disclosed are a method for wireless communication, a terminal device, and a network device. One example method includes: determining, by a first terminal device based on first indication information, a first resource related to half-duplex communication, wherein the first terminal device is a reduced capability (RedCap) device, the first resource is used by the first terminal device to perform at least one of uplink transmission or downlink reception in a non-terrestrial network (NTN), wherein the first resource is a time-frequency resource and is pre-configured, and the first resource comprises a plurality of random access channel occasion (ROs), and at least two ROs in the plurality of ROs respectively correspond to different synchronization signal blocks (SSBs).