Based On The Zigbee Wireless Sensor Network (wsn) Research

Wireless sensor network is deployed by a large number of micro sensor nodeswith sensing, communication and computing power in the observation area, andconstitute a multi-hop wireless communications since the organization of newinformation acquisition system. Each nodes division of the labor and cooperationmutually, perceiving, acquisiting and processing the information of the monitoredobject in the observation area, in order to achieve the target detection, identification,tracking and positioning in the area. The application of wireless sensor networks isincreasingly being used, and the ZigBee communication technology which is mostsuitable for wireless sensor networks has also been a rapid development.In article studying wireless sensor networks in three main areas. First, use the TI’sZ-Stack to build a network which is best match with ZigBee-compliant. Introducingthe architecture and workflow of stack, analysing and discussing the protocol ofcoordinator set up a network and communication between nodes, developing thecoordinator node and termonal node application based on the Z-Stack protocol stack.Then, using a wireless location technology based on the received signal strengthindication (the Received Signal Strength Indicator, RSSI) based on the above hardwareplatform and ZigBee protocol stack. Analysing the influencing factors for RSSIranging, and proposing the Gaussian model to optimize the RSSI value, so that toimprove positioning accuracy. Using the above wireless sensor network hardwareplatform, to design a complete set of wireless location communication procession, andin accordance with the different functions of the nodes in the system developingdifferent applications. To ensure the safety of wireless sensor network, using of AESencryption on the network and designing process of the encryption algorithm.Finally, on the basis of the above hardware platform and software, debugging the system and obtaining experimental results.