Message transmission method and apparatus, signal sending method and apparatus, and communication device

A message transmission method, comprising:

• sending, by a first device, a first message to a second device, wherein the first message comprises:
• a first index number, and the first index number is associated with content indicated by the first message, wherein the first message comprises at least one of the following:
• a duration of the first signal requested or suggested by the first device;
• sending signal power of the first signal requested or suggested by the first device;
• a signal direction of the first signal requested or suggested by the first device;
• or
• information of processing time when the first device receives an echo of the first signal, wherein the first signal is a signal used for sensing, or the first signal is a sensing and communication integrated signal;
• receiving, by the first device, a second message sent by the second device, wherein the second message indicates configuration information of the first signal;
• and sending, by the first device, the first signal based on the configuration information of the first signal;
• and
• receiving, by the first device, the first signal sent by a third device based on configuration information of the first signal, wherein the configuration information of the first signal is sent by the second device to the third device by using the second message,
• wherein the second message comprises:
• the configuration information of the first signal, or
• a second index number associated with the configuration information of the first signal.

A communication device, comprising a processor;

• and a memory having a computer program or an instruction stored thereon, wherein the computer program or the instruction, when executed by the processor, causes the processor to perform operations comprising:
• receiving, by a second device, a first message sent by a first device, wherein the first message comprises:
• a first index number, and the first index number is associated with content indicated by the first message, wherein the first message comprises at least one of the following:
• a duration of the first signal requested or suggested by the first device;
• sending signal power of the first signal requested or suggested by the first device;
• a signal direction of the first signal requested or suggested by the first device;
• or
• information of processing time when the first device receives an echo of the first signal, wherein the first signal is a signal used for sensing, or the first signal is a sensing and communication integrated signal;
• determining, by the second device, configuration information of the first signal based on the first message;
• and
• sending, by the second device, a second message to the first device or a third device, wherein the second message indicates the configuration information of the first signal, so that the first device or the third device sends the first signal based on the configuration information of the first signal,
• wherein the second message comprises:
• the configuration information of the first signal, or
• a second index number associated with the configuration information of the first signal.