Institute of Electrical & Electronic Engineers
In 3GPP LTE-Advanced, relaying is considered as an important means for extending cell coverage and improving capacity. Channel measurement with the introduction of backhaul sub-frame needs to be carefully designed to achieve the performance advantage of relay. In this paper, the authors propose a simple yet effective channel measurement and corresponding channel quality reporting scheme for an in-band relaying system based on sub-frame grouping. The proposed channel measurement scheme estimates the interference level at different sub-frames and helps scheduler make decisions in different sub-frames. Their evaluations show that the proposed framework can improve the cell average and cell-edge user performance, for different deployment scenarios.