Design And Implementation Of WSID System Based On Contiki

WSID system is a combination of WSN technology and RFID technology system. In more and more practical applications, the single WSN system has problems in the system complexity and power consumption, and the single RFID system is in the system coverage, and the network communication ability is insufficient. The emergence of the concept of WSID is the use of existing technologies to construct a more functional and better performance of the system. But the concept of the current WSID system is more to stay at the theoretical level, so the design and implementation of a set of available WSID system, are very meaningful in theory and application.The main contents of design and implemation are as follows:1. To solve the problem of multi platform synchronous development, this thesis set up a generic system development platform. Detailed study of the Contiki embedded operating system components and protocol layer. According to the overall design strategy, the implementation scheme of the system is selected, and the hardware design of the edge router, reader node and tag is completed.2. Contiki embedded system is transplanted to the hardware platform of LPC4337+CC2520, and the scheduling mechanism of Contiki is optimized in the process of porting. LWIP protocol stack is integrated into the Coniki system to achieve the proxy server, and finish designing the edge router.3. The part of the 2.4GHz active RFID GB/T28925-2012 protocol is integrated into the Contiki system, achieve and improve the binary tree collision algorithm, improve the time efficiency of the inventory. At last, a reader node with wireless network and tag access is designed.4. Design and implement the tag system based on the GB/T28925-2012 protocol on Contiki platform.In this system, it integrates the Contiki 6LoWPAN protocol stack, LwIP protocol stack and 2.4GHz active RFID GB/T28925-2012 protocol in Contiki system platform, and realizes a WSID system, in which we can control the reader to access and control the tag through wireless network.The system And the WISD system includes edge router, reader nodes and tags. Finally, the test results show that the system has the advantages of convenient installation and deployment, wide coverage and low network complexity.