Signal transmission method and related device

A network device, comprising:

• a memory storing a program;
• and
• at least one processor in communication with the memory, wherein the at least one processor is configured to execute the program to:
• send a first synchronization signal/broadcast channel block (SSB) to a first terminal device, wherein the first SSB comprises a synchronization signal and a physical broadcast channel (PBCH), the synchronization signal and the PBCH use a frequency division multiplexing (FDM) manner in resource occupation, a quantity of orthogonal frequency division multiplexing (OFDM) symbols occupied by the synchronization signal is greater than 2, and a quantity of OFDM symbols occupied by the PBCH is greater than 3;
• and
• send a second SSB to a second terminal device in a new radio (NR) system, wherein the second terminal device and the first terminal device are terminal devices in different communications systems.

A terminal device, comprising:

• a memory storing a program;
• and
• at least one processor in communication with the memory, wherein the at least one processor is configured to execute the program to:
• receive a first synchronization signal/broadcast channel block (SSB) sent by a network device, wherein the first SSB comprises a synchronization signal and a physical broadcast channel (PBCH), the synchronization signal and the PBCH use a frequency division multiplexing (FDM) manner in resource occupation, a quantity of orthogonal frequency division multiplexing (OFDM) symbols occupied by the synchronization signal is greater than 2, and a quantity of OFDM symbols occupied by the PBCH is greater than 3;
• wherein the first SSB and a second SSB occupy half-frames at a same time domain position, the second SSB is an SSB sent by the network device to a second terminal device in a new radio (NR) system, and the second terminal device and the first terminal device are terminal devices in different communications systems.