A base station (231, 233), comprising: a first transceiving interface, being configured to receive a special event notification message from a core network, wherein a first wireless end device (253, 273) and a second wireless end device (251, 271) are in a coverage of the base station (231, 233), the first wireless end device (253, 273) has a first priority for transmission, the second wireless end device (251, 271) has a second priority for transmission, and the first priority for transmission is lower than the second priority for transmission; a processor, being electrically connected to the first transceiving interface and configured to generate an emergency alert indicator and a barring message (230, 236) after the first transceiving interface receives the special event notification message; and a second transceiving interface, being electrically connected to the processor and configured to transmit the emergency alert indicator to the second wireless end device (251, 271) to enable the second wireless end device (251, 271) into an active mode for receiving a piece of emergency related information, wherein the emergency alert indicator is listened to by the first wireless end device (253, 273), and the first wireless end device (253, 273) will receive the barring message (230, 236) after having listened to the emergency alert indicator, wherein the second transceiving interface is further configured to transmit the barring message (230, 236) to the first wireless end device (253, 273) to suspend the first wireless end device (253, 273) from transmitting data to the base station (231, 233) for a barring time interval, wherein the base station (231, 233) is not overloaded when the barring message (230, 236) is generated and transmitted. a first transceiving interface, being configured to receive a special event notification message from a core network, wherein a first wireless end device (253, 273) and a second wireless end device (251, 271) are in a coverage of the base station (231, 233), the first wireless end device (253, 273) has a first priority for transmission, the second wireless end device (251, 271) has a second priority for transmission, and the first priority for transmission is lower than the second priority for transmission; a processor, being electrically connected to the first transceiving interface and configured to generate an emergency alert indicator and a barring message (230, 236) after the first transceiving interface receives the special event notification message; and a second transceiving interface, being electrically connected to the processor and configured to transmit the emergency alert indicator to the second wireless end device (251, 271) to enable the second wireless end device (251, 271) into an active mode for receiving a piece of emergency related information, wherein the emergency alert indicator is listened to by the first wireless end device (253, 273), and the first wireless end device (253, 273) will receive the barring message (230, 236) after having listened to the emergency alert indicator, wherein the second transceiving interface is further configured to transmit the barring message (230, 236) to the first wireless end device (253, 273) to suspend the first wireless end device (253, 273) from transmitting data to the base station (231, 233) for a barring time interval, wherein the base station (231, 233) is not overloaded when the barring message (230, 236) is generated and transmitted.