Signal transmission method and related device thereof

A signal transmission method, comprising:

• obtaining a parameters of a secondary carrier cell, wherein the parameter indicates a real-time status of the secondary carrier cell;
• determining that the parameter is less than or equal to a corresponding threshold and that the secondary carrier cell is in a first state;
• and
• in response to the determination, shutting down one or more first orthogonal frequency division multiplexing (OFDM) symbols in a first subframe of the secondary carrier cell, wherein each first OFDM symbol carries a cell specific reference signal (CRS) corresponding to a port.

A communication apparatus, comprising:

• a processor;
• and
• a memory coupled to the processor and configured to store a computer program comprising instructions that, when executed by the processor, cause the communication apparatus to perform the following:
• obtaining a parameter of a target cell, wherein the parameter indicates a real-time status of the target cell;
• determining that the parameter is less than or equal to a corresponding threshold and that each terminal device in connected mode in the target cell is in a discontinuous reception (DRX) sleep period or no terminal in connected mode exists in the target cell;
• and
• shutting down one or more first orthogonal frequency division multiplexing (OFDM) symbols in a first subframe of the target cell, wherein each first OFDM symbols each carries a cell specific reference signal (CRS) corresponding to a port.