Design And Implementation Of Automatic Information Acquisition Terminal For Optical Distribution Network Based On RFID

With the proposed "Broadband China" strategy, Optical access network has entered the peak period of development. Optical distribution network is confronted with massive information of optical port resources to be managed, the traditional style of management that manually recorded optical port information by paper labels, with low efficiency of construction and high rate of artificial error, will be replaced by new one. RFID is a rising technology in the field of automatic identification in recent years and gradually mature, which realizes bi-directional communication by radio signal, with the purpose of identifying e-Tag, reading and writing information of tag. Efficient, fast, reliable, contactless and harsh environment adaptive features have made RFID technology widely used in different fields.For the purpose of collecting optical port information, reducing error-rate of manual records, making use of infrastructure laid for optical distribution network, reducing product cost, an automatic acquisition terminal used for recording optical port information was designed and realized in this paper, which fused modern RFID technology and embedded technology, powered by mobile phone supported USB OTG. The terminal is low-power, small and portable. There are two main functions: automatic data acquisition of optical port information and IAP rollback upgrade. Simply place the upgrade file in the main directory of mobile phone, you can make rollback upgrade.Firstly, this paper introduces the research background and significance of the project and the present situation of RFID technology at domestic and international. Meanwhile, the paper also briefly introduces the basic knowledge of RFID system, including RFID system principle, e-Tag classification, design of RF antenna and calculation of the equivalent impedance and ISO/IEC 15693 transport protocol, etc.Secondly, from the perspective of hardware, the design of the microcontroller peripheral circuit and RF transceiver circuit are both analyzed in detail. This paper not only introduces the USB OTG circuit and microcontroller minimum system in detail, but also the design principle of RF front-end circuit, especially in the aspect of circuit parameters selection.Thirdly, this paper not only introduces the design and implementation of system from the whole structure perspective, but also different functional modules are analyzed in detail, such as bottom communication module, protocol layer module, IAP upgrade module and RF transceiver module.Finally, according to the expected goals, there are two major functions-IAP upgrade function and RF reader to be tested, in order to verify whether they meet the demands, then system performance on business has been tested on the whole. Besides, this paper summarizes the shortcomings according to the results of testing, and puts forward some improved suggestions in some respects.