Fuente: Wipo "IOT" A channel access method over an internet of things (IoT) interface. The network determines a time point for transmitting a trigger signal to at least one IoT device and transmits accordingly. The network detects a message carried in each of at least one first device-to-reader IoT signal from the at least one IoT device and determines target IoT device (s) in response to the detected message. The network transmits a message carried in a first reader-to-device IoT signal to the target IoT device (s). The network detects a message carried in one of second device-to-reader IoT signal (s) from one of the target IoT device (s). The network determines whether to transmit a message in a second reader-to-device IoT signal to the target IoT device (s) according to a decoding result of the detected message carried in the second device-to-reader IoT signal(s) associated with the one of the target IoT device (s).