Wireless Communication System Design And Research Based On IEEE802.15.4g

In the beginning of2009, IEEE802.15Task Group4G was founded, focusing on drafting the standard of IEEE802.15.4g to develop new PHY layer schemes which meet the requirements such as low power, low cost and long-distance transmission according to the applications of Smart Grid. During the period of drafting, many famous companies, universities and research institutions started to pay close attention to and be engaged in the theoretical study of new PHY layer schemes. Several well-know semiconductor design companies, such as TI and Analog devices, had launched the RF transceiver chips which comply with IEEE802.15.4g standard. After several years of research, discussion and revision, the standard of IEEE802.15.4g was published formally in May,2012.The standard specifies three new alternate PHY layer schemes, which is the amendment of IEEE802.15.4standard. The standard also specifies a Multi-PHY Management scheme to facilitate coexistence and interference avoidance among multiple SUN networks utilizing different PHY layers. The main aim of this standard is to facilitate very large scale process control applications capable of supporting large, geographically diverse networks with minimal infrastructure with potentially millions of fixed end-points, especially applied to battery-powered large-scale sensor networks with the requirements of ultra low power, long-distance transmission and excellent anti-interference performance, such as Smart Grid. Therefore, this thesis will focus on developing a wireless communication system based on IEEE802.15.4g standard, applied to the industrial smart meter measurement and control field, so as to ensure that the industrial wireless communication network can run safely, steadily and efficiently.Firstly, the thesis introduces the research background, significance and current status at home and abroad of the wireless communication system based on IEEE802.15.4g. Secondly, this thesis describes the main function, the structure of the model and the data frame format provided by the PHY layer and MAC layer of IEEE802.15.4standard. Meanwhile, this thesis details three new added PHY layer schemes and important mechanism to facilitate collision avoidance, which is prepared theoretically for the actual system design of wireless sensor networks. Thirdly, we determine the hardware overall design scheme according to the system overall planning and the design requirements of the network node. After that, the work, including the appropriate selection of chips and components for each module, the design of the hardware circuit and PCB plate making, is completed. Then this thesis briefly introduces the software development platform IAR, completes the software workflow design of the coordinator node and sensor node in the star network topology on the IAR platform, and analyzes the possible exceptional situation and its handling process. Data collected from sensor nodes is displayed by host computer. Finally, the thesis summarizes the work done, points out the potential shortcoming in the system, and specifies the direction of future work.The results show that the system runs steadily, transmits reliably and has a strong link self-healing ability and anti-interference ability. Thus it complies with the design requirements and has a broad application prospect.