Research And Design Of Wireless Location And Tracking System Based On ZigBee

The paper is to design and implement a wireless location and tracking system, in which hardware and software are all researched and designed, based on the technology of ZigBee and wireless location. Three points the system should be get, one is data transfer among node, second point is self-establishment of network, and the wireless location function overall the network.After introduce the content and background of the paper, the architecture is brought forward, including comparing and selection of IC, implement method of hardware and software. In collecting information, USB port is introduced, beside PC, any portable device that have USB OTG function can be connected to the gate node, which greatly extend the scope of application. For software design, layered and module method is used, that makes the software easier to migrate and manage.When come to detail implementation of hardware, after comparing most solutions in the market that support IEEE802.15.4, from integration, cost, source of hardware and software, as well as compatibility. Finally CC2430 and CC2431 are chosen as main node IC. Monopole antenna is used after analyzing the features of antenna needed by wireless sensor networks, and then analyzed the performance, advantages and disadvantages. Use CY7C68013 to support USB port, which communicates with node IC through GPIF. The rules are given when get PCB process, and finally introduce the flow and method of debugging hardware system.When come to detail implementation of software, ZigBee protocol stack and usage of TI's ZigBee2006 program model are analyzed. UART and USB communication method and program interface are introduced, especially USB port, method of how to send data and command to wireless node is given. Then get the point of how to analyze and implement wireless location algorithm, introduce the foundation principle of location and common location algorithm, and the flow of location using CC2431.Summary and prospect is the last item of the paper. Any technology is always going forward, the performance of the system design in the paper can definitely be promoted, such as method of location, location precision and speed, as well as network architecture and diversity of communication port.