Patent ID: 8447228

Claim:
A power distribution apparatus (PDA) for use in a relay transmission system (RTS), the RTS comprising a mobile station (MS), a relay station (RS) and a base station (BS), the MS communicating with the BS through the RS, the PDA being able to communicate with the MS, the RS and the BS, the PDA comprising: a storage unit, being configured to store a power threshold and transmission information of the RTS; and a processor, being electrically connected to the storage unit and configured to: compute a total data mean square error (MSE) according to the transmission information; and compute a first transmission parameter of the MS, a second transmission parameter of the BS and a relay forward parameter of the RS according to the power threshold, the total data MSE and an algorithm so that the MS determines an MS transmission power according to the first transmission parameter, the RS determines an RS transmission power according to the relay forward parameter, and the BS determines a BS transmission power according to the second transmission parameter.