Study On Mobility Management For IPv6-based Wireless Sensor Networks

At present, as a new hot field of The Internet of things, WSN has attracted the attention of the academia and industry. As the sensor network technology develops, connectivity between the WSN and the IP-based internet has become an important research. The 6LoWPAN working group created by IETF in November, 2004 aims to connect WSN with IPv6.The new features of IPv6 such as huge address space, Security, Mobility and Neighbor Discovery would do a great favor to the development of WSN.As the requirement of mobile WSN becoming more and more,the mobility management of the IPv6-based WSN brings great theoretic and realistic purport. The key issues of mobility are how to improve node connectivity in the wireless sensor network, and how to reduce the energy consumption and network latency under the condition of the nodes moving. This thesis focuses on the mobility handover, network topology and routing algorithms in 6LoWPAN mobility management. The main contributions of the thesis are as follows:(1) The in-depth research of the technology and mobility management of IPv6-based WSN, evaluate the disadvantage and advantage of techniques objectively.(2) Proposed a proxy-based mobility management for IPv6-based WSN. To solve the energy consumption, network latency and signaling cost of the 6LoWPAN sensor node, the paper proposed a proxy-based mobility management for IPv6-based WSN, designed a hierarchical structural model and network topology for the WSN at first. Then it proposed a mobility handoff mechanism and a routing algorithm for the model.(3) Finally, we make use of OMNeT++ software to test the proposed proxy-based mobility management and the network-based and energy-aware 6LoWPAN mobility management. The theory analysis and the simulation results verify that the end-to-end delay, packet loss ratio and signaling cost performance of the proxy-based mobility management is better than that of the network-based and energy-aware 6LoWPAN mobility management.