Development of an Intelligent Gateway for ZigBee-based Monitoring and Control Systems

• Main Authors: You, MingZhe, 游明哲
• Other Authors: Lin,ShihSong
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/30437391280994774211

碩士 === 國防大學理工學院 === 電子工程碩士班 === 100 === For constructing a ZigBee-based monitoring and control (MC) system to monitor different places across various regions, usually we need to deploy a ZigBee wireless sensor network (WSN) and a local server in each region. The local server is used to connect with the ZigBee coordinator, process sensor data locally, and communicate with the remote central MC server. When the number of monitored regions is large, for example in the case of monitoring military storerooms, such an approach that uses a local server in each monitored region will significantly increase the total system construction cost. Also, the local server only needs to process the sensor data for its located region, thereby wasting the computing resource. Thus, this study utilizes several technologies, such as Embedded System, Wired Networking, and Wireless Communication, to develop an intelligent gateway for the ZigBee-based MC system so as to improve the aforementioned shortcomings. Specifically, we use an embedded system to develop the gateway for reducing the construction cost. In addition to the capability of communicating with the ZigBee coordinator, the gateway can communicate with the remote server through wired network (Ethernet) and wireless communication (GSM). Also, the wired network communication and the wireless communication of the gateway can automatically backup each other so that the gateway’s communication availability increases. Consequently, the developed intelligent gateway can replace the local server to extend the transmission distance of the ZigBee WSN. Finally, we construct a paradigm military-storeroom MC system at Chung Cheng Institute of Technology, National Defense University and successfully validate the efficacy of the developed gateway in terms of effectively extending the transmission distance of the ZigBee WSN and the communication-backup capability.