Terminal, base station, radio communication method, and system

Abstract

A terminal is disclosed that includes a processor that controls transmission of a random access preamble based on at least one of information related to one or more PRACH transmission occasions in a time domain and information related to one or more PRACH transmission resources in a frequency domain. The terminal further includes a transmitter that transmits the random access preamble. In other aspects, a base station, radio communication method, and system are also disclosed.

1 . A terminal comprising:
 a processor that controls transmission of a random access preamble, based on at least one of: information related to one or more PRACH transmission occasions in a time domain; and information related to one or more PRACH transmission resources in a frequency domain; and   a transmitter that transmits the random access preamble.   
     
     
         2 . The terminal according to  claim 1 , wherein the transmitter transmits the random access preamble in a cell in which communication is performed in a spectrum other than a licensed spectrum. 
     
     
         3 . The terminal according to  claim 2 , further comprising a receiver that receives a response to the random access preamble in a cell in which communication is performed in a licensed spectrum. 
     
     
         4 . A base station comprising:
 a transmitter that transmits at least one of: information related to one or more PRACH transmission occasions in a time domain; and information related to one or more PRACH transmission resources in a frequency domain; and   a receiver that receives a random access preamble, the random access preamble being transmitted by a terminal based on at least one of the transmitted information.   
     
     
         5 . A radio communication method for a terminal, comprising:
 controlling transmission of a random access preamble, based on at least one of: information related to one or more PRACH transmission occasions in a time domain; and information related to one or more PRACH transmission resources in a frequency domain; and   transmitting the random access preamble.   
     
     
         6 . A system comprising a terminal and a base station, wherein the terminal comprises:
 a processor that controls transmission of a random access preamble, based on at least one of: information related to one or more PRACH transmission occasions in a time domain, and information related to one or more PRACH transmission resources in a frequency domain; and   a transmitter that transmits the random access preamble, and the base station comprises:   a receiver that receives the random access preamble.