in a case that the pieces of UCI of different priorities are coded respectively, using different code rates for the pieces of UCI of different priorities.

Correspondingly, the method further includes:

• • determining code rates used for the pieces of UCI of different priorities based on a first scaling factor and a code rate corresponding to a PUCCH resource;
  • or,
  • determining code rates used for the pieces of UCI of different priorities based on code rates that correspond to the pieces of UCI of different priorities configured by RRC.

The first scaling factor is configured by RRC, or indicated by DCI, or defined in a protocol. Optionally, the code rate corresponding to the above PUCCH resource is a code rate configured by a network-side device for the PUCCH resource through RRC signaling.

For example, a network-side device configures different code rates for the PUCCH resource through RRC signaling, and pieces of UCI of different priorities correspond to different code rates.

For another example, high-priority UCI uses a code rate corresponding to the PUCCH resource, and low-priority UCI uses a code rate that is a product of the code rate corresponding to the PUCCH resource times a first scaling factor. In this case, the first scaling factor is less than 1.