Internet of Things is an information carrier based on Internet and traditional telecommunication network, which makes all ordinary physical objects that can be addressed independently form an internet.
2, the composition of the Internet of Things:
The Internet of Things can be roughly divided into the following four levels: perception layer, network layer, platform layer and application layer. Details are as follows:
(1), perceptual recognition layer.
Perception layer is the foundation of the whole Internet of Things architecture and an important link in the integration of the physical world and the information world. In the sensing layer, we can sense the information of the object itself and its surroundings through sensors, so that the object also has the ability to "speak and release information", such as sound sensors, pressure sensors, light intensity sensors and so on. The perception layer is responsible for collecting and obtaining information for the Internet of Things.
(2) Network construction layer.
The network layer plays a connecting role in the whole Internet of Things architecture, and it is responsible for transmitting perceptual information to the upper layer and commands to the lower layer. The network layer transmits the information collected by the perception layer to the IOT cloud platform, and is also responsible for transmitting the instructions issued by the IOT cloud platform to the application layer, which plays a role as a link. The network layer mainly transmits massive information through Internet of Things, Internet and mobile communication network.
(3) Platform management.
The platform layer is the core of the overall architecture of the Internet of Things, which mainly solves the problems of how to store, retrieve and use data, as well as data security and privacy protection. The management of the platform is responsible for effectively integrating and utilizing the information collected by the perception layer through technologies such as big data and cloud computing, and providing scientific and effective guidance for people to apply to specific fields.
(4) Comprehensive application layer.
The Internet of Things will eventually be applied to various industries. After the Internet of Things cloud platform processes the information transmitted by objects, the valuable information mined will be applied to real life and work, such as smart logistics, smart medical care, food safety, smart parks and so on.
Extended data:
The functions of the Internet of Things mainly include the following points:
1, the function of obtaining information.
Perception and recognition of information, information perception refers to the perception and sensitivity to the attribute state of things and their changing ways; Information recognition refers to the ability to express the state of things in some way.
2. The function of transmitting information.
Transmitting information refers to the task of sending, transmitting and receiving information, and finally transmitting the obtained state information and its change mode from one time point (or space) to another time point (or space), which is usually called the propagation process.
3, the function of processing information.
Processing information refers to the process of information processing. Using existing information or perceived information to generate new information is actually a decision-making process.
4. The function of efficacy information.
Validity information refers to the process in which information finally takes effect, and there are many forms. More importantly, by adjusting the state of the object and its transformation mode, the object is kept in a pre-designed state.
Baidu encyclopedia-internet of things