Transmission method and apparatus, device, and readable storage medium

A transmission method, comprising:

• receiving, by a network-side device, information for determining a position of a valid orthogonal basis and a coefficient of the valid orthogonal basis that are sent by a terminal;
• wherein the information for determining the position of the valid orthogonal basis comprises at most two of spatial domain orthogonal basis, bitmap, or delay position;
• and
• determining, by the network-side device, precoding for downlink transmission based on the information for determining the position of the valid orthogonal basis and the coefficient of the valid orthogonal basis;
• wherein the method further comprises:
• sending, by the network-side device, first indication information, wherein the first indication information indicates the terminal not to send the spatial domain orthogonal basis and the delay position;
• wherein the information for determining the position of the valid orthogonal basis does not comprise the bitmap, the delay position, and the spatial domain orthogonal basis.

A terminal, comprising:

• a processor, a memory, and a program stored on the memory and capable of running on the processor, wherein the program, when being executed by the processor, implements:
• sending information for determining a position of a valid orthogonal basis and a coefficient of the valid orthogonal basis to a network side, wherein the information for determining the position of the valid orthogonal basis comprises at most two of spatial domain orthogonal basis, bitmap, or delay position;
• wherein the program is executed by the processor to further implement:
• receiving first indication information, wherein the first indication information indicates the terminal not to send the spatial domain orthogonal basis and the delay position;
• the sending the information for determining the position of the valid orthogonal basis to the network side comprises:
• sending the information for determining the position of the valid orthogonal basis to the network side, wherein the information for determining the position of the valid orthogonal basis does not comprise the bitmap, the delay position, and the spatial domain orthogonal basis.