MULTI-CAR ELEVATOR SYSTEM AND CHANNEL SELECTION METHOD

This balanced circulating multi-car elevator system has a pair of cars that are arranged at diagonal positions, wherein the frequency of the wireless communication between a control device and the cars is effectively used. The cars are provided with: antennas (111, 112) on the top and the bottom thereof; a car location detection unit (113); a channel selection unit (115) for selecting a channel and an antenna selection unit for selecting an antenna, both selections carried out on the basis of a car location in a loop (22); and a wireless signal transmission unit (116) for transmitting a signalby using the selected channel and antenna. Each car wirelessly communicate by using the antenna close to the ceiling or the antenna close to the floor, depending on the detected location of the car.If one car has determined itself to be close to the ceiling or the floor, the channel selection unit (115) uses the same channel as the wireless communication of the other car. If the car determines itself to be located midway