SYSTEM AND METHOD FOR TRANSMITTING DATA FROM BASE STATION TO USER STATION THROUGH RELAY STATION IN WIRELESS COOPERATIVE RELAY NETWORK, AND WIRELESS COOPERATIVE RELAY NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a wireless cooperative relay network which optimally transmits data by using imperfect channel state information (CSI) in the downlink of a radio channel.;SOLUTION: Data are transmitted from a base station to a user station through a relay station. Imperfect channel state information (CSI) is obtained with respect to a downlink channel from the base station and the relay station to the user station. For each candidate transmission plan of a set of candidate transmission plans, a corresponding beam formation matrix is determined according to the imperfect CSI. For each beam formation matrix, limit values of a predictive target profit function are determined and a specific one of the limit values is selected. After that, data are transmitted from the base station to the user station through the relay station according to the beam formation matrix and the candidate plan which are associated with the selected limit value.;COPYRIGHT: (C)2009,JPO&INPIT