Random access method in the radio communication system, radio communication system, radio terminal and base station apparatus

摘要

In the event of detecting first information used for first random access and second information used for second random access, the second information being received from the base station unit (10), a wireless terminal (20) selects one between the first information and the second information (S1c). Thereby, either one of the random accesses can be selectively performed, efficiently using resources such as signatures used for random access.