Abstract: Systems and methods of controlling the ventilation of an electric vehicle comprising a power cell and a cabin vent. An operational mode of the electric vehicle is determined. An operational state of the power cell is determined. The closure of the cabin vent is controlled based on the operational mode of the electric vehicle and the operational state of the power cell.

Abstract: A communication method, apparatus, and system are provided. The method may be performed by a first network device, or may be performed by a component (for example, a processor, a chip, or a chip system) of the first network device. In one example method, the first network device determines that a terminal device is to enter a first area, where the first area is an area in which the terminal device is handed over from the first network device to a second network device, or the first area is an area in which the first network device and the second network device perform joint transmission; and the first network device sends first indication information to the terminal device before the terminal device enters the first area, where the first indication information indicates to measure a first tracking reference signal of the second network device.