Disclosed in embodiments of the present application are a resource allocation method, a device, and a medium. The method comprises: a terminal device determines N NPRACH transmission resources corresponding to a sending period of an ephemeris-bearing SIB bearing according to said sending period as well as configuration information for an NPRACH transmission resource indicated in an SIB2, where N is a natural number greater than zero; the terminal device randomly selects one NPRACH transmission resource from among the N NPRACH transmission resources; and the terminal device performs random access on a network device by means of the selected NPRACH transmission resource. By means of the present method, a terminal can randomly select one transmission resource to perform random access from among a plurality of available transmission resources, causing randomly delayed sending when the terminal performs random access, allowing for dispersion among different transmission resources, the probability of a collision is lowered, and the problem of random access failure caused by a transmission resource sending collision due to terminals initiating random access on a same transmission resource is effectively prevented.