Data transmission control method, network side device and terminal side device

A data transmission control method, comprising:

• interacting, by a terminal side device, uplink reference signal measurement or downlink reference signal measurement with a network side device, so as to divide antenna ports of the network side device into quasi co-location (QCL) groups, each QCL group being an antenna port group established in accordance with a QCL relationship among the antenna ports;
• and
• performing, by the terminal side device, data transmission in accordance with the QCL groups,
• wherein the data transmission comprises service data transmission or CSI transmission,
• wherein during the CSI transmission, the data transmission control method further comprises:
• receiving, by the terminal side device, measurement configuration information from the network side device;
• performing, by the terminal side device, CSI measurement on the antenna ports in the QCL group in accordance with the measurement configuration information;
• calculating, by the terminal side device, CSI about a to-be-measured channel in the measurement configuration information in accordance with a coherent transmission mode or incoherent transmission mode;
• and
• reporting, by the terminal side device, a resultant CSI calculated by the terminal side device to the network side device.

A network side device, comprising a processor, a memory, and a computer program stored in the memory and executed by the processor, wherein the computer program is executed by the processor, so as to implement a data transmission control method, comprising:

• mapping, by the network side device, codewords to at least one data layer, on the basis of a quantity of layers and a quantity of the codewords;
• mapping, by the network side device, the at least one data layer to at least one quasi co-location (QCL) group, the QCL group being an antenna port group established in accordance with a QCL relationship among antenna ports;
• performing, by the network side device, data transmission in accordance with the QCL group,
• wherein in a non-spatial multiplexing state, when data is transmitted in a multi-layered and diversified manner, the mapping, by the network side device, the at least one data layer to the at least one QCL group comprises:
• when the data is transmitted in a coherent mode, mapping, by the network side device, all the data layers to one QCL group;
• or, when the data is transmitted in an incoherent mode, mapping, by the network side device, the data layers corresponding to different data layer subsets to different QCL groups, and mapping the data layers corresponding to a same data layer subset to one or more QCL groups, or
• wherein in a closed-loop spatial multiplexing state, the mapping, by the network side device, the at least one data layer to the at least one QCL group comprises:
• when the data is transmitted in a coherent mode, mapping, by the network side device, all the data layers to one QCL group;
• or, when the data is transmitted in an incoherent mode, mapping, by the network side device, data layers corresponding to different data layer subsets to different QCL groups, and mapping the data layers corresponding to a same data layer subset to a same QCL group, or
• wherein in an open-loop spatial multiplexing state, the mapping, by the network side device, the at least one data layer to the at least one QCL group comprises:
• when the data is transmitted in a coherent mode, mapping, by the network side device, all the data layers to one QCL group;
• or, when the data is transmitted in an incoherent mode, mapping, by the network side device, all the data layers to at least two QCL groups.