Multi-layer distributed data source service registration and access mechanism for Internet of things

Abstract

The invention discloses a multi-layer data source service registration and access mechanism developed by the application of an industrial process measurement and control network. The overall network adopts a two-layer network topology structure combining star and Mesh, a centralized and distributed multi-layer network system management mode, and a unique data source service registration process based on a node backup unit, thereby avoiding the phenomenon of failure in grid connection since nodes are busy in data transmission. During access to data source services, uplink and downlink modes ofa data source based on the information frame class are adopted. Firstly, a primary route is deployed uniformly, and a latter cluster can be connected flexibly with the grid by only one primary route.The method improves the measurement and control of sub-nodes in traditional industrial equipment control, and it is based on a high reliability communication technology for radio frequency environmentrecognition and adaptive frequency hopping. Through a gradient control local expansion change routing protocol, a maximum freedom encryption / decryption principle, a special network-level registrationand access mechanism including a physical layer, frame relay and a network layer, and a special data encryption way, the reliable transmission of equipment node data in a harsh environment is ensuredin order to sufficiently adapt to field equipment control and maintenance of industrial wireless Internet of things.

Description

technical field [0001] The invention is based on the wireless technology information transmission mode, and is a multi-level Internet of Things data source service registration and access mechanism developed for industrial process measurement and control applications, and belongs to the application of wireless technology in the field of industrial automation. Background technique [0002] With the development of information technology, industrial field equipment has been gradually digitized, networked and intelligent, and the control network is the nerve center of the control system composed of these intelligent equipment. At present, the control network is developing towards the industrial wireless network, which has become a new research hotspot in the field of industrial control automation, and has achieved preliminary results. The industrial wireless network with the self-organizing and self-healing intelligent Mesh network routing mechanism can adapt to the network's Dyn...

AI Technical Summary

Problems solved by technology

At present, the control network is developing towards the industrial wireless network, which has become a new research hotspot in the field of industrial control automation, and has achieved preliminary results, and the industrial wireless network with self-organizing and self-healing intelligent Mesh network routing mechanism, although it can adapt to the network Dynamic changes cannot really adapt to the national conditions of my country's industrialization. The preliminary results obtained are only applicable to the centralized management and control of large-scale complete sets of machinery, and most of the cases are wired connections, which do not really meet the needs of modern industries. Therefore, in order to better adapt to complex industrial environments, ensure that the network Reliability, registration and access of multi-level distributed data sources requires a complete set of wireless networking mechanism, with its main features of high reliability, high real-time performance, low power consumption, low cost, easy maintenance and deployment, etc.

Traditional industrial measurement and control systems are expensive to use and difficult to maintain, especially for wired process control. Once the equipment is completed, it is even more difficult to monitor individual machinery or parts and nodes from the site.

On the other hand, due to the limited hardware resources of the traditional wireless sensor network, the terminal nodes based on battery power supply cannot last for a long time due to the nature of the work, the working environment is relatively harsh, and the resistance to external attacks is poor. The data source registration and access mechanism of the multi-level distributed Internet of Things can solve the above problems well, and new key rules can be added according to the degree of data confidentiality, which can also prevent confidential data from being stolen to a greater extent and eliminate malicious Nodes confuse data in the network or send false data to nodes in the network. In addition, this mechanism is also an improvement on the basis of existing industrial wireless networks, effectively making up for traditional competition-based access channels, so improving data reliability and real-time performance , it is particularly important to establish a data source registration and access mechanism that truly adapts to industrial field equipment

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