Abstract: A base station determination method includes: acquiring differential positioning information of at least one base station; according to a received satellite positioning signal and at least one group of differential positioning information, respectively calculating a calculation position of a roadside device corresponding to the at least one group of differential positioning information; and determining a target base station from the at least one base station according to the calculation position of the roadside device and the actual position of the roadside device. The target base station is a base station that corresponds to differential positioning information corresponding to a calculation position, the distance between which and the actual position is the least.

Abstract: An information sending method includes: obtaining first information for positioning a terminal device, the first information comprising differential positioning information, or the first information comprising at least one of environmental information or a satellite positioning signal, and differential positioning information; and when the first information satisfies a preset condition, sending the differential positioning information to the terminal device. The method can effectively reduce the sending of unnecessary differential positioning information, thereby avoiding unnecessary energy consumption waste of a roadside device and the terminal device, saving the time of the terminal device to calculate position information, and improving the high-precision positioning efficiency of the system.