Base station apparatus and user apparatus

A communication method of a terminal, the communication method comprising:

• receiving configuration information for identifying a RACH (Random Access Channel) resource from a base station apparatus;
• identifying a slot for transmitting a random access preamble based on the configuration information;
• and
• transmitting the random access preamble to the base station apparatus via a RACH resource arranged in the slot,
• wherein the identifying includes identifying the RACH resource based on a number of consecutively arranged RACH resources associated with one synchronization signal (SS) block, the number being indicated by the configuration information.

A base station apparatus comprising:

• a processor configured to determine a RACH (Random Access Channel) resource;
• a transmitter configured to transmit configuration information for identifying the RACH resource to a terminal;
• and
• a receiver configured to receive a random access preamble from the terminal via a RACH resource arranged in a slot indicated by the configuration information,
• wherein the processor identifies the RACH resource based on a number of consecutively arranged RACH resources associated with one synchronization signal (SS) block, the number being indicated by the configuration information.