Method implemented by first wireless user device and method implemented by base station

Abstract

The invention relates to a method and apparatus for random access for a user device with reduced capacity in a wireless communication system. The method for implementing random access by a user device (UE) in a wireless communication system according to a scheme of the invention may include the acquisition of configuration information related to random access from the base station; The operation identifies at least one of the RACH opportunity groups (RACH opportunity, RO) associated with the transmission of random access preamble, one or more ROs, and the random access preamble group based on at least one of the configuration information related to random access, LEE type, and level of error; and the operation transmits one or more random access preambles in each of one or more ROs.