[Retracted] Key Technologies of Real-Time Location Service in Satellite Navigation and Positioning Network Based on Internet of Things

Table 2

IoT key technologies.

Floor	Key technology
Perception control layer	Sensor technology, RFID technology, QR code technology, ZigBee technology, positioning technology, bluetooth technology, etc.
Network transport layer	Internet, mobile communication network, wireless sensor network, etc.
Application service layer	M2M technology, cloud computing technology, artificial intelligence technology, data mining, middleware