A method of transmitting data from a network node to a wireless terminal, the method comprising: transmitting first and second data blocks over respective first and second multiple-input-multiple-output, MIMO, layers to the wireless terminal during a first MIMO transmission time interval, TTI; characterized by the steps of transmitting a third data block over a third MIMO layer to the wireless terminal during the first MIMO transmission time interval, TTI, receiving feedback from the wireless terminal for the first MIMO TTI wherein the feedback includes first and second ACK-NACK codewords, the first codeword mapping to the first MIMO layer and the second ACK-NACK codeword mapping to the second and third MIMO layers; responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, transmitting a discontinuous transmission indicator for the first MIMO layer to the wireless terminal; responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, retransmitting the second data block over the second MIMO layer to the wireless terminal during a second MIMO TTI after transmitting the discontinuous transmission indicator responsive to the network node being transmit buffer limited for the wireless terminal and-responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, retransmitting the third data block over the third MIMO layer to the wireless terminal during the second MIMO TTI after transmitting the discontinuous transmission indicator. transmitting first and second data blocks over respective first and second multiple-input-multiple-output, MIMO, layers to the wireless terminal during a first MIMO transmission time interval, TTI; characterized by the steps of transmitting a third data block over a third MIMO layer to the wireless terminal during the first MIMO transmission time interval, TTI, receiving feedback from the wireless terminal for the first MIMO TTI wherein the feedback includes first and second ACK-NACK codewords, the first codeword mapping to the first MIMO layer and the second ACK-NACK codeword mapping to the second and third MIMO layers; responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, transmitting a discontinuous transmission indicator for the first MIMO layer to the wireless terminal; responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, retransmitting the second data block over the second MIMO layer to the wireless terminal during a second MIMO TTI after transmitting the discontinuous transmission indicator responsive to the network node being transmit buffer limited for the wireless terminal and-responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, retransmitting the third data block over the third MIMO layer to the wireless terminal during the second MIMO TTI after transmitting the discontinuous transmission indicator.