Research And Implementation Of Internet Of Things Gateway Based On Edge Computing

With the rapid development of the Internet of Things and the upgrading of the industry,the scale of edge device networking is becoming larger and larger,but the traditional centralized Io T architecture has been unable to adapt to the development of Io T technology and faces many problems.Among them,the real-time data processing and the security of data interaction are the most prominent.At present,for the real-time and security of the Io T,there is no real perfect solution.However,the emergence of edge computing models and blockchain technology has provided the possibility to solve the above problems.This paper takes the edge computing model as the core and combines the security features of the blockchain technology to design a new Io T gateway system to solve the real-time and security issues of the Io T.The specific research includes the following aspects:(1)Aiming at the real-time nature of the data processing of the Io T,firstly,the edge computing model is compared and analyzed.Considering the diversity of Io T device protocols,the complexity of data sources,and the uncertainty of the number of devices,an object based on the Edge X Foundry edge computing framework is constructed.Secondly,from the three aspects of device communication protocol,packet size and device number,this paper uses the method of theoretical analysis and experimental research to test the delay performance of Io T gateway,to ensure the stable communication between nodes of Io T,and to verify that the Io T gateway has the advantages of protocol scalability,low time delay and high concurrency.On this basis,a temperature and humidity alarm system is constructed to verify that the Io T gateway has edge data processing capabilities.(2)Aiming at the security problems in the communication process of the Io T gateway,the data transmission scheme of the Io T gateway based on the information security protection mechanism is designed.The AES and RSA encryption algorithms are compared and analyzed.The key generation and encryption-decryption delay are comprehensively analyzed,and a scheme combining AES and RSA is proposed.Aiming at the trust problem of the Io T gateway subnodes,the ECDSA digital signature algorithm is researched and analyzed to ensure the secure and reliable communication between the Io T gateway and the cloud server,and to solve the trust problem between nodes.Aiming at the security of the data storage of the Io T gateway,a decentralized idea is adopted to design a decentralized application to realize the secure storage of data,the traceability of data,and the tamper resistance of data.(3)Build a software and hardware platform for the Io T gateway system,test and analyze the functions,operating delays,and security performance of the new Io T gateway system,verifying that the new Io T gateway solution based on edge computing and blockchain technology designed in this paper has the advantages of low delay and high security,and provide a new solution for the development of Io T gateway technology.