The Research And Implementation Of Wireless Sensor Network Based On6LoWPAN

The development of Wireless Sensor Network and the rise of Internet of Things make itpossible that millions of WSN nodes connect to Internet in the IP way. The application and the largescale populization of IPv6protocol will also provide IP address guarantee and protocol support foreach node of Wireless Sensor Network connecting to the Internet with a distinctive IPv6address.There is widespread concern and attention on Wireless Sensor Network based on6LoWPAN, whichis spurred altogether by the technologies of Wireless Sensor Network, Internet of Things and IPv6protocol. There is profound necessity to strengthen the revelant research of this field, which willgreatly promote the process of the WSN nodes of sensing layer of the Internet of Things shiftingtowards IP. And it also has the prominent practical significance for the Age of the Internet of Things,in which everything will have its own IP address and keep being always online.Firstly, the key technologies of WSN based on6LoWPAN are analyzed and elaboratedsystematically in this thesis, including the network structure of6LoWPAN, adaptation layer, routingand forwarding, and the mobile management. Secondly, a design proposal for6LoWPAN stackbased on Contiki operating system is put forward through the incorporation and modification ofexisting protocol stacks. And then the code is written to implement the primary functions of theadaptation layer of the WSN based on6LoWPAN. Through the stack designed in this thesis, theIPv6packets can be transmitted in the wireless sensor network successfully.At the end of the thesis, the appropriate hardware and software platform is selected to test thepartial functions of the6LoWPAN stack. Meanwhile, the Cooja simulation environment is adoptedto simulate the whole performance of6LoWPAN network. It mainly implements such functions aspacket fragmentation and reassembly, UDP packet transition, environmental data collection andnetwork topology monitoring on the premise that the6LoWPAN network can connect to IPv6network normally. In the process of testing, the whole system can work normally. Through this test,it achieves the anticipated objectives and results, proving the correctness of the theory andvalidating the rationality and feasibility of the6LoWPAN stack designed for WSN in the thesis.