SYSTEM, AND COMMUNICATION DEVICE

A system including: a first communication device and a second communication device, wherein the first communication device and the second communication device perform the wireless communication that conforms to first wireless communication standards, and, when one of the first communication device and the second communication device decides that information obtained by the wireless communication that conforms to the first wireless communication standards satisfies a predetermined condition, perform the wireless communication that conforms to second wireless communication standards for measuring a distance between the first communication device and the second communication device.