Base station, communication terminal and communication system

Abstract

A base station (B) includes a wireless communication unit () for performing wireless communication with a communication terminal (A), a radio resource allocation unit () for allocating an individual channel in a resource of the wireless communication, a transmission/reception timing determination unit () for determining a transmission/reception timing at which transmission and reception with the communication terminal (A) through the individual channel is performed, a communication state identification unit () for identifying whether the communication with the communication terminal (A) is indirect communication with interposition of a relay device () or direct communication without interposition of the relay device, and a reception timing adjustment unit () for adjusting a timing at which the individual channel for upstream communication is used in accordance with a result of the identification made by the communication state identification unit ().