TRANSMISSION RECEPTION METHOD AND DEVICE FOR INVERSE DIRECTION MIMO RETRANSMISSION BY PHICH IN LTE SYSTEM

摘要

PROBLEM TO BE SOLVED: To propose a method controlling UL HARQ even with only PHICH, for settling a problem that PDCCH must be transmitted, when requesting retransmission only of one TB, in a LTE system supporting UL MIMO.SOLUTION: In transmission reception method and device of a mobile communication system supporting an uplink MIMO, two transmission blocks are transmitted by a terminal with a predetermined number of layers and by respective precoding indices, and when any one of the transmission blocks is not yet received, a base station transmits a response signal indicating the not yet received transmission block, the terminal determines the precoding index of the not yet received transmission block to a preset value, and retransmits the not yet received transmission block while maintaining the number of layers.SELECTED DRAWING: Figure 11