Information transmission method and apparatus

A method performed by a terminal device or a chip in a terminal device, comprising:

• determining that data information associated with a first radio access system needs to be sent or received on a first time domain resource, and synchronization information associated with a second radio access system needs to be sent or received on a second time domain resource, the synchronization information includes a sidelink synchronization signal, wherein the first time domain resource and the second time domain resource are completely or partially the same;
• and
• when a priority of the data information is higher than a first threshold, sending or receiving the data information;
• or
• when a priority of the data information is lower than or equal to a first threshold, sending or receiving the synchronization information, wherein the synchronization information carries a synchronization signal used to synchronize the terminal device to the second radio access system, wherein the priority of the data information is indicated by sidelink control information (SCI) and a priority of the synchronization information is indicated by radio resource channel (RRC) signaling.

A communication apparatus, comprising:

• one or more processors;
• and
• a memory, wherein the memory stores a computer program, and when executing the computer program stored in the memory, the one or more processors executes operations comprising:
• determining information with a higher priority in first information associated with a first radio access system and second information associated with a second radio access system, wherein time domain resources associated with the first information and the second information are completely or partially the same, and the first information is data information and the second information is second synchronization information, wherein the second synchronization information includes a sidelink synchronization signal block (S-SSB);
• and
• sending or receiving the information with the higher priority, wherein the priority of the data information is indicated by sidelink control information (SCI) and the priority of the second synchronization information is indicated by radio resource channel (RRC) signaling.

A communication apparatus, comprising:

• one or more processors;
• and
• a memory, wherein the memory stores a computer program, and when executing the computer program stored in the memory, the one or more processors executes operations comprising:
• determining that data information associated with a first radio access system needs to be sent or received on a first time domain resource, and synchronization information associated with a second radio access system needs to be sent or received on a second time domain resource, the synchronization information includes a sidelink synchronization signal, wherein the first time domain resource and the second time domain resource are completely or partially the same;
• and
• when a priority of the data information is higher than a first threshold, sending or receiving the data information;
• or when a priority of the data information is lower than or equal to a first threshold, send or receive the synchronization information, wherein the synchronization information carries a synchronization signal used to synchronize the communication apparatus to the second radio access system, wherein the priority of the data information is indicated by sidelink control information (SCI) and the priority of the synchronization information is indicated by radio resource channel (RRC) signaling.