Methods and devices supporting MIMO transmission/recep tion are discussed. For example,
first and second data blocks may be transmitted/received respectively using first and sec ond
transmission/reception layers during a first TTI for rank two transmission/reception. A first
HARQ process may be mapped to the first data block of the first layer for the first TTI. A
second HARO process may be mapped to the second data block of the second layer for the
first TTI. Third, fourth, and fifth data blocks may be transmitted/received respectively using …