Definition of Internet of Things technology

Internet of Things (iot) technology is defined as the use of information sensing devices such as radio frequency identification (RFID), infrared sensors, qcm6125 global positioning systems and laser scanners to connect any object to the Internet according to an agreed protocol, a networking technology that exchanges and communicates information for intelligent identification, positioning, tracking, monitoring and management.

The core and foundation of "Internet of Things" technology is still "Internet technology", which is the extension and expansion of network technology on the basis of Internet technology. Its client extends and extends to any object for information exchange and communication.

Second, the basic situation of the Internet of things, qualcomm qcm6490 basic theoretical concepts and key technologies

Basic concept: The Internet of Things is an extension of the Internet, is the network of "everything", constitutes the Internet of things, that is, the Internet of everything;

1. Sensor technology: This is also a key technology in computer applications. As we all know, the vast majority of computers so far have processed digital signals. For as long as there have been computers, sensors have been needed to convert analog signals into digital signals that computers can process.

2.RFID tag: It is also a kind of sensor technology, RFID technology is one of the integrated technologies combining radio frequency technology and embedded technology, RFID has broad application prospects in automatic identification, logistics management and so on.

3. Embedded system technology: It is a complex technology integrating computer hardware and software, sensor technology, integrated circuit technology and electronic application technology. After decades of evolution, intelligent terminal products characterized by embedded systems can be seen everywhere. From MP3 players around people to satellite systems in aerospace. Embedded systems are changing people's lives and promoting the development of industrial production and defense industry. If the Internet of Things is simply likened to the human body, the sensor is equivalent to the human eyes, nose, skin and other senses, the network is the nervous system that transmits information, and the embedded system is the human brain. After receiving the information, classify it. This example graphically describes the position and role of sensors and embedded systems in iot.

4. Network and communication technology

As the basic channel for information transmission and service support of the Internet of Things, by enhancing the professionalism and interconnection functions of the existing network communication technology, in order to adapt to the business requirements of the Internet of Things with low mobility and low data rate, to realize the safe, stable and reliable transmission of information, which is a focus of the current Internet of Things research. The main content of sensor network communication technology includes wide area network communication and short distance communication. The main problems of wide area network communication technology include IP Internet, 2G/3G mobile communication, satellite communication and other technologies. The development of new networking with IPv6 as the core provides more efficient transmission channels for the Internet of Things. In the near field communication development, the current mainstream is IEEE802.15.4 as the representative of the near field communication technology.