A communication method, a device, and a system. The method includes: determining a first sensing amount, where the first sensing amount includes at least one first tuple, the first tuple includes at least one element, and the element includes a delay, a distance, an azimuth angle, a pitch angle, strength, a velocity, or a frequency offset, and a first access network device corresponds to a first radio access technology RAT; obtaining a second sensing amount from a second access network device, where the second sensing amount includes at least one second tuple; determining a third sensing amount based on the first sensing amount and the second sensing amount, where the third sensing amount includes at least one third tuple; and sending the third sensing amount to a first core network device.