Method for Adjusting Quantity of Data Streams, Terminal, and MIMO System

A terminal, comprising:

• one or more processors;
• and
• a memory coupled to the one or more processors, wherein the memory is configured to store instructions that, when executed by the one or more processors, cause the terminal to be configured to:
• recognize a first scenario, and send a first message to a network device, wherein the first message is to request the network device to reduce a quantity of transport layers used in a downlink data transmission process, wherein the first message carries a second transport layer quantity, wherein the second transport layer quantity is less than a first transport layer quantity, and wherein the first transport layer quantity is a quantity of transport layers used by the terminal and the network device in the downlink data transmission process;
• receive a second message from the network device, wherein the second message is to configure a quantity of transport layers in the downlink data transmission process, wherein the second message carries a third transport layer quantity, and wherein the third transport layer quantity is less than or equal to the second transport layer quantity;
• and
• receive and parse a downlink signal from the network device based on the third transport layer quantity.