FIELD: radio engineering, communication.
SUBSTANCE: invention relates to mobile communication systems which support an uplink multiple input-multiple output (MIMO) scheme. In the transmission method, user equipment (UE) transmits two transport blocks according to a predetermined number of layers and respective precoding indices, an evolved Node B (eNB) transmits, when one of the transport blocks is lost, a negative acknowledgement for the lost transport block, and the UE sets a precoding index for the lost transport block to a predetermined value to retransmit the lost transport block while maintaining the number of layers.
EFFECT: minimising the frequency resource and transmission power consumption.
14 cl, 12 dwg, 7 tbl
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