COMMUNICATION TERMINAL DEVICES, BASE STATION DEVICE, AND COMMUNICATION SYSTEM

摘要

A communication system that can improve the efficiency with which a Control Channel (CCH) is used in a resource. The communication system includes a base station (10), a terminal B that is inside an arrival coverage of a physical control format indicator channel (PCFICH) signal containing a control format indicator (CFI), and a terminal A that is outside the arrival coverage. The base station (10) updates the CFI during a time period of 1 ms and updates the physical hybrid ARQ indicator channel (PHICH) duration during a time period of 40 ms. The base station (10) performs scheduling of the data to be sent to the terminal B for each subframe, whereas the base station (10) performs scheduling of the data to be sent to the terminal A only in a subframe in which the PHICH duration value matches the CFI value. The terminal A acquires data to be sent to the terminal A on the basis of the CCH region size determined in accordance with the PHICH duration value transmitted from the base station (10).