| 摘要 |
<p>Disclosed is a random access method, comprising: selecting any one random access sequence from a specified number of access sequences used by a cell in which a terminal is located as a first access sequence, mapping the first access sequence onto a specified bandwidth according to a preset sub-carrier interval, generating a first random access signal, the sub-carrier interval being smaller than 1.25 KHZ; sending the random access signal to a base station so that the base station determines a round-trip transmission time delay according to the first access sequence in the random access signal; receiving a timing advance adjustment command sent by the base station, the timing advance adjustment command carrying the round-trip transmission time delay; and adjusting a timing advance according to the round-trip transmission time delay, sending a first message to the base station based on the adjusted timing advance so that the base station demodulates the first message, and accessing the terminal in a physical random access channel. The embodiments of the present invention can guarantee access to a terminal of an ultra-long distance in a physical random access channel.</p> |
