The invention relates to a DCI (Downlink Control Information) sending method,
system and device as well as an transmission uplink method,
system and device, relating to the technical field of
wireless communication and aiming at solving the problem that a network side is difficult to dispatch a user terminal to carry out
uplink transmission because the traditional DCI does not support an LTE-A (Long Term Evolution-Advanced)
system in the prior art. The DCI sending method disclosed by the embodiment of the invention comprises the following steps that: the network side generates the DCI used for dispatching the
uplink transmission; the network side sends the generated DCI, wherein the DCI comprises the following information: resource indication information, modulation indication information, data indication information, mapping indication information and
precoding indication information, wherein the resource indication information is used for indicating the positions of allocated resources; the modulation indication information is used for indicating a
modulation coding order of a transmission block; the data indication information is used for indicating whether the transmission block transmits new data or not; the mapping indication information is used for indicating the corresponding relationship of the transmission block and a
code word; and the
precoding indication information is used for indicating the size of an
uplink transmission order and an index of a used
precoding code word. The DCI sending method can be used for enhancing the efficiency of the uplink transmission.