Relay station, information processing apparatus, and method

An information processing apparatus comprising a controller configured to:

• when a relay station including a plurality of antennas relays a first signal transmitted from a transmission station to a reception station by amplifying and forwarding, and in a case where one or more first antennas among the plurality of antennas are set as reception antennas for the first signal, and one or more second antennas among the plurality of antennas are set as transmission antennas for the first signal after the relay, estimate a signal to interference and noise power ratio (SINR) of the first signal at the reception station, the first signal being transmitted from the transmission station, received by the one or more first antennas of the relay station, transmitted from the one or more second antennas of the relay station, and received by the reception station, on a basis of a transmit power of the first signal at the transmission station, first propagation characteristics between the one or more first antennas and the transmission station, second propagation characteristics between the one or more second antennas and the reception station, a noise power and an interference power added to the first signal at the relay station, and a noise power at the reception station;
• and
• determine the one or more first antennas and the one or more second antennas in a combination that makes the SINR maximum respectively as the reception antennas and the transmission antennas.

A method, comprising:

• when a relay station including a plurality of antennas relays a first signal transmitted from a transmission station to a reception station by amplifying and forwarding, and in a case where one or more first antennas among the plurality of antennas are set as reception antennas for the first signal, and one or more second antennas among the plurality of antennas are set as transmission antennas for the first signal after the relay, estimating, by a computer, a signal to interference and noise power ratio (SINR) of the first signal at the reception station, the first signal being transmitted from the transmission station, received by the one or more first antennas of the relay station, transmitted from the one or more second antennas of the relay station, and received by the reception station, on a basis of a transmit power of the first signal at the transmission station, first propagation characteristics between the one or more first antennas and the transmission station, second propagation characteristics between the one or more second antennas and the reception station, a noise power and an interference power added to the first signal at the relay station, and a noise power at the reception station;
• and
• determining, by the computer, the one or more first antennas and the one or more second antennas in a combination that makes the SINR maximum respectively as the reception antennas and the transmission antennas.