1. An apparatus, comprising:a processor, coupled with a storage medium configured to store instructions,wherein when executed by the processor, the instructions cause the apparatus to:receive a preamble sequence from a terminal in a random access process;
determine a narrowband frequency resource available to the terminal according to a correspondence between the narrowband frequency resource and an index of the preamble sequence; and
transmit downlink control information for the terminal, the downlink control information being carried on the determined narrowband frequency resource;
wherein the narrowband frequency resource is one of a plurality of narrowband frequency resources, the index of the preamble sequence is one of a plurality of indexes of preamble sequences, and the correspondence between the narrowband frequency resource and the index of the preamble sequence is one of a plurality of correspondences between the narrowband frequency resources and the indexes of preamble sequences.