IoT gateway definition: In the Internet, the gateway is a kind of intermediate device that connects cat 16 speed the intranet and extranet with other networks on the Internet, also called "wireless router", and in the institutional framework of IoT technology, in the perception layer and network layer 2 different networks must be an intermediate device, that is "IoT gateway".
The gateway plays a very important main role in the IoT system, what are the shapes of the gateway?
Wireless network to wireless: WiFi to 433MHz, infrared, ZigBee (common at home)
Wired to wireless network: Ethernet interface to 433MHz, infrared, ZigBee (common at home)
GPRS (2G, 3G, 4G, 5G) to 433MHz, infrared, ZigBee (common in industrial production)
Wireless network to wired: WiFi to RS485, RS232, CAN (industrial production is the majority)
Wired to wired: Ethernet interface to RS485, RS232, CAN (industrial production is the majority)
IoT gateway efficacy is a variety of connection methods fusion down, both to consider the communication requirements of short routes in some areas, but also to complete the connection with the public sex network, and at the same time also need to carry out the solution, sharing and manipulation of data files. The IoT gateway should have the following roles.
The first IoT gateway in the rising communication layer, should have the basic elements of the general Internet technology wireless router, according to the wired wireless network a variety of interface way to connect 4G mobile network, Internet technology, to facilitate the flexible compatible Internet technology. The second IoT gateway has universal perception network acceptance ability, with a variety of fields jack, to ensure the smooth, rapid and accurate acceptance of different kinds of perception data information.
Manageable method capability.
Strong management method capability for all medium and large networks are indispensable. The first to carry out management methods on the gateway, such as application registration management methods, management rights, situation control, etc.. The next gateway to complete the management method of the connection point within the subnet mask, such as obtaining the logo, situation, characteristics of the connection point, and its remote control to complete the evocation, manipulation, diagnosis, update and protection. Because the standard specification of subnet mask is different, the plurality of protocols is different, so the gateway has different manageability capability.
Protocol transformation capabilities.
Transformation of protocols from different sensing networks to connected networks, unified encapsulation of data information in the underlying specification file format, ensuring that the protocols of different sensing networks can be changed into unified information and messages; analysis of data sent from the top layer into messages and program control that can be distinguished by the protocols of the sensing layer.