Fecha de publicación: 23/10/2020 Fuente: Wipo "IOT" According to one aspect of the present invention, provided is an IoT device control method that does not affected by a communication state. The IoT device control method that does not affected by a communication state is applied to a network in which an IoT device and a user terminal exchange data through short-range wireless communication, and a user terminal and an IoT server transceive data through high speed data communication. The IoT device control method that does not affected by a communication state includes: a step in which, upon receiving an IoT device registration request, the IoT server generates a server public key and a server security key and transmits the server public key to the user terminal; a step in which, upon receiving the server public key, the user terminal divides and transmits the server public key to the IoT device; a step in which, upon receiving the divided and transmitted server public key, the IoT device generates a device public key and a device security key, generates and saves the IoT device symmetric key by using the server public key and the device security key, and divides and transmits the device public key to the user terminal; a step in which, upon receiving the divided and transmitted device public key, the user terminal transmits the device public key to the IoT server; and a step in which, upon receiving the device public key, the IoT server generates an IoT server symmetric key by using the device public key and the server security key, wherein, in the dividing and transmitting, the device public key is transmitted by dividing into units of a data size that can be transmitted once by the short-range wireless communication. COPYRIGHT KIPO 2021