Patent ID: 8913950

Claim:
A radio relay method relaying signal transmitted and received between a base station apparatus and a mobile station apparatus, the radio relay method comprising: calculating throughput expectation values in a case of using a first relay method and a second relay method respectively, based on error rate calculated from each reception quality between a relay station apparatus relaying a radio signal and the base station apparatus and between the relay station apparatus and the mobile station apparatus, and on relay delay of the first relay method amplifying and transmitting the radio signal and the second relay method decoding, error correcting, re-encoding, and transmitting the radio signal respectively; selecting one relay method of which a throughput expectation value is higher than another relay method; and relaying the radio signal based on the selected relay method; wherein the error rate includes a first error rate calculated from a reception quality by referring to a first characteristic table corresponding to the first relay method, and a second error rate calculated from a reception quality by referring to a second characteristic table corresponding to the second relay method.