In the wireless sensor network, the IoT gateway is an indispensable core device. In addition, the IoT gateway needs to have the device management function. The operator can manage the underlying sensing nodes through the IoT gateway device, understand the related information of each node, and realize remote control.
The key technologies of the IoT gateway include two aspects:
1. Multi-standard interworking access capability
There are many technical standards currently used for short-range communication. Common sensor network technologies include ZigBee, Z-Wave, RUBEE, WirelessHART, IETF6IowPAN, Wibree, and the like. Various technologies are mainly developed for a certain type of application, and there is a lack of compatibility and system planning. For example, Z-Wave is mainly used in wireless smart home networks, RUBEE is suitable for harsh environments, and WirelessHART is mainly concentrated in industrial monitoring. Realizing the interconnection and intercommunication of various communication technology standards has become a problem that the Internet of Things gateway must solve. Is to design a separate gateway for each standard, and then through the unified interface between the gateways; or use the standard adaptation layer, different technical standards to develop the corresponding interface implementation?
2, the manageability of the gateway
As a network element connected to the network, the IoT gateway must have certain management functions, including registration and login management, rights management, task management, data management, fault management, status monitoring, remote diagnosis, parameter query and configuration, and event processing. , remote control, remote upgrade, etc. If you need to realize the manageability of the whole network, you must not only realize the management of the gateway device itself, but also further realize the management of each node in the subnet through the gateway, such as obtaining the information of the node's logo, status, attributes, etc., as well as remote wake-up, control, Diagnosis, upgrade maintenance, etc. According to the technical standards of the subnets and the complexity of the protocols, the management contents that can be performed are quite different.
The shape of the Internet of Things gateway
From the definition of IoT gateway, the IoT gateway is difficult to appear in a relatively fixed form. Generally speaking, any device that can transmit the information collected by the sensing layer to the Internet through the protocol conversion of the terminal can be regarded as an IoT gateway. The form may be a box shape or a tablet computer, and may have an interactive form of a display screen or a closed or semi-closed non-interactive form.
IoT gateway application direction
Where there is an IoT application, there must be an IoT gateway. Through the sensor connected to the sensing layer, radio frequency (RFID), micro-electromechanical systems (MEMS), intelligent embedded terminals, the application of IoT gateway will cover intelligent transportation, environmental protection, government work, public safety, safe home, intelligent fire protection, industry Monitoring, environmental monitoring, street lighting control, landscape lighting control, building lighting control, square lighting control, elderly care, personal health, flower cultivation, water monitoring, food traceability, enemy reconnaissance and intelligence gathering. The protocols and gateways used by IoT gateways in different application directions are different, but their basic functions are to convert all kinds of information collected by the sensing layer into high-speed data through the relevant protocols to achieve high-speed data transmission to the Internet, and at the same time realize certain management functions.
Vehicle Networking Gateway: One of the industries in which Internet of Things (IoT) has done a good job is considered by the domestic academic community to be the first practical IoT system, which has been demonstrated by the national expert group.
Smart Home: The use of IoT gateways in the home is also a very representative IoT application. Nowadays, many household devices in the family are becoming more and more diverse. Some devices have remote control capabilities, such as air conditioners and televisions. Some water heaters, microwave ovens, rice cookers, refrigerators, etc. do not have this capability. Even if these devices can be remotely controlled, their control ability and control range are very limited, and these devices exist in isolation from each other, and cannot effectively share resources and information. With the development of the Internet of Things technology, especially the maturity of the Internet of Things gateway technology, the problem of interconnection and intercommunication among various household devices in smart homes will also be solved.
Chen Jianjiang, CEO of Shunzhou Technology, believes that in the development of the Internet of Things, the role of the gateway must be emphasized. Regardless of the technology used, the gateway is an indispensable part of the whole system. The most important way of the Internet of Things is networking, whether it is included in the enterprise. Private clouds are still public clouds. Only the interconnection between networks is an important way to realize the Internet of Things. Now Shunzhou Technology has made achievements in this area. ZigBee & GPRS Gateway, ZigBee & Wi-Fi Gateway, ZigBee & BLE Gateway are all available, helping enterprises to quickly set up and grow rapidly.
The concept of the Internet of Things has a long history, but the specific implementation and composition of the Internet of Things has not formed a unified opinion. As one of the key technologies, IoT gateway still has many problems such as high development cost, long development cycle, incompatible software and hardware, difficult core technology, uncertain business model, and difficulty in unifying standards.
Guangzhou Ehang Electronic Co., Ltd. , https://www.ehangmobile.com