A wireless access system in which a base station and a mobile communication device communicate with each other via a relay station.

摘要

To provide a technology for improving transmission efficiency in a radio access system in which a base station communicates with a mobile communication device via a relay station in accordance with a NOMA technology.SOLUTION: A radio access system includes a base station, a plurality of relay stations, a plurality of mobile communication devices, and the base station transmits a multiplexed signal in a first time slot and a next second time slot, and the plurality of relay stations decode the multiplexed signal received from the base station in the first time slot, and the first relay station from among the plurality of relay stations generates and transmits a multiple signal to each of the plurality of mobile communication devices on the basis of the decoding result of the multiple signal received in the first time slot from the base station in the second time slot, and a second relay station different from the first relay station from among the relay stations decodes the multiplexed signal received from the base station in the second time slot, and the first relay station is selected from relay stations that have succeeded in decoding the multiplexed signal.SELECTED DRAWING: Figure 2