Design And Implementation Of Communication Network Architecture For The Measurement And Control System Of Internet Of Things

With the development of networking technology, the single mode of wireless communication can not meet the different demand for information transmission.The sharing mode for a variety of wireless communication network is more and more popular, so the discussion of wireless communication network networking method of abnormal structure is of value to theoretical significance and engineering application.For a wide range of wireless network protocol, with different architectures, are not compatible with each other. In this thesis, A new network architecture and protocol stack were designed on the basis of the analysis of existing international standard of wireless communication and the decomposition of the wireless network protocol standard specification. The network architecture and protocol stack retain the inherent characteristics of the wireless network and redefine the integration layer specification.Its feasibility and effectiveness are verified by the application in the greenhouse monitoring system.This thesis mainly do the following several aspects of research work:1.A new type of wireless network architecture which supports TCP/IP protocol is constructed. Analysis of WiFi, Bluetooth, ZigBee wireless communication standards for their respective characteristics and differences, retained the original protocol network layer and transport layer based, definition and the integration of the application layer specification constructed a new multi protocol wireless network architecture. Then gives a detailed description of the application of the specification, which provides a framework for inter protocol conversion in heterogeneous networks.2.The definition of the new network architecture protocol stack. According to the network environment of information transmission requirements, design the protocol stack, including network model, communication, connection, the I/O trigger mode to realize the different network architecture, the protocol of application layer sharing.3.The design and application of the intelligent monitoring and control system for greenhouse. The new wireless network architecture is applied in the greenhouse intelligent monitoring system. The system consists of perception layer, control layer and the information layer,an application layer sharing protocol is designed for the cross layer information transmission of multi layer and inter layer information transmission (ZigBee, WiFi,3G/4G, TCP/IP).Then the hardware circuit and software programming of the system’s controller and sensing network are given.The seamless integration of different wireless network architecture has been done.The feasibility and effectiveness of the network architecture are verified by the test and the successful application of the user.