Research And Design Of Multimode Gateway Based On Internet Of Things

With the development of Internet of Things technology,the Internet of Things technology has been widely used in smart homes,smart cities,intelligent transportation systems,etc,which greatly facilitates people's life.Therefore,many scientific research institutions and companies have also invested a lot of financial and material resources in deep research.As the middleware in the application of the Internet of Things,the Internet of Things gateway takes on the bridge between virtual and reality.As the key point in the Internet of Things system,the importance of the Internet of Things gateway is self-evident.The current Internet of Things gateway can only be used for specific application scenarios,and its substitutability is poor,which is not conducive to secondary development.Moreover,the existing gateway has a single application protocol and cannot comprehensively process data of different protocols,resulting in industry barriers between different gateways.These limitations greatly hinder the development of the Internet of Things,making the Internet of Things unable to meet broader needs.In order to solve the above problems,this paper designs a multi-mode gateway structure and adds data processing functions in the gateway.The gateway integrates four different wireless communication protocols and can transfer different protocol stacks to communicate with sensor nodes,solving the problem of inability to communicate between different protocols.In order to reduce the data processing time of the gateway system and improve the data anomaly detection rate,a multi-mode anomaly detection algorithm model was proposed,the model uses an algorithm such as one-dimensional sliding window,multi-dimensional sliding window and evolutionary game theory to complete the detection of abnormal data.The hardware platform of the gateway system is then designed so that it can support integrated access to the four wireless communication protocols.Then,for the hardware platform of the multi-mode gateway,the software design of the multi-mode gateway is performed,the Contiki operating system is transplanted in the sensing node,the Linux operating system is transplanted in the gateway system,and the TUN/TAP virtual in the operating system is utilized.The network device injects data into the protocol stack,completes format conversion of the slip data to the IP data,and realizes the connectivity between the wireless network and the wired network.The designed multi-mode gateway system can support the integrated network access of IPv6,ZigBee,WIFI and Bluetooth,and can implement protocol conversion between heterogeneous networks.