Ranging and positioning method and system, and apparatus

A ranging and positioning method, comprising:

• sending, by a first terminal device, first configuration information through a first communication frequency band having a first bandwidth;
• sending first ranging information through a second communication frequency band having a second bandwidth greater than the first bandwidth used in the in the first communication frequency band;
• receiving, by a first device, the first configuration information, completing time synchronization with the first terminal device in the first communication frequency band based on the first configuration information, determining a moment at which the first ranging information arrives, and receiving the first ranging information;
• sending, by a second terminal device, second configuration information through the first communication frequency band, and sending second ranging information through the second communication frequency band;
• receiving, by the first device, the second configuration information, completing time synchronization with the second terminal device in the first communication frequency band based on the second configuration information, determining a moment at which the second ranging information arrives, and receiving the second ranging information;
• sending, by a third terminal device, third configuration information through the first communication frequency band, and sending third ranging information through the second communication frequency band;
• receiving, by the first device, the third configuration information, completing time synchronization with the third terminal device in the first communication frequency band based on the third configuration information, determining a moment at which the third ranging information arrives, and receiving the third ranging information;
• and
• determining a location of the first device based on time differences of arrival between the first ranging information, the second ranging information, and the third ranging information.

A communication apparatus, comprising:

• a processor;
• and
• a memory storing a computer program code or instructions that, when executed by the processor, cause the communication apparatus to perform:
• receiving first configuration information, second configuration information, and third configuration information through a first communication frequency band having a first bandwidth;
• receiving first ranging information, second ranging information, and third ranging information through a second communication frequency band having a second bandwidth greater than the bandwidth used in the first communication frequency band;
• after completing time synchronization with a first terminal device in the first communication frequency band based on the first configuration information, determining a moment at which the first ranging information arrives, and receiving the first ranging information;
• and
• determining a location of the first device based on time differences of arrival between the first ranging information, the second ranging information, and the third ranging information.