RADIO BASE STATION, RADIO TERMINAL DEVICE, RADIO RELAY STATION DEVICE, TRANSMISSION POWER CONTROL METHOD, RADIO COMMUNICATION RELAY METHOD, AND RADIO COMMUNICATION SYSTEM

摘要

A different resource is allocated to each of a terminal and a relay station as a resource for the communication with a base station. A radio base station device (1) provided in the base station includes: a determination unit (7) which determines whether or not relaying of a random access preamble is performed based on the resource information included in the random access preamble; and a response generating unit (10) which generates a random access response to which relay flag information is attached. When the random access response with the relay flag information attached is transmitted from the base station to the terminal, the control of the transmission power of an RRC connection request is performed at the terminal based on the relay flag information. This allows for the suppression of increase in the delay before the establishment of RRC connection, and thereby a radio base station device which improves the utilization effect of resources is provided.