In Wireless sensor networks (WSNs), group mobility is important in many practical application scenarios, and it is inconvenient for traditional static WSNs to collect information. In this paper, we propose a WSN model based on IPv6 over Low power Wireless Personal Area Networks (6LoWPANs) in mobile sensing application scenarios. Wireless mesh sensor network (WMSN) infrastructure and Network Mobility (NEMO) protocol are deployed to ensure the continuity of the communications. The routing optimization mechanism in the nested network is then discussed. By taking mobile network partition and IP address configuration in the nested network, the corresponding signaling flow is discussed. Simulation results indicate that our mechanism is able to minimize the transmission costing, handoff delay, throughput and energy consumption of sensor nodes. Energy of each mobile router (MR) saves around 0.2？J per 3 seconds. 1. Introduction With the maturation of wireless sensing technologies, the mobile sensing communication systems are widely applied and deployed on a global scale. The demand for information and mobility businesses hopes that some of the fixed and mobile nodes in wireless sensor network are composed of a collection of subnets as a whole, while the whole can move and access the Internet seamlessly. It is urgent that we need mobility mechanisms to support the mobile of a single terminal and subnet terminal. For example, mobile personal area networks where the sensor networks are deployed in vehicular objectives such as aircraft, automobiles, and trains [1]. The development of traditional WSN mobility management technology is still not mature enough; most mobility protocols of traditional wireless sensor networks only aim at coping with weak mobility, such as join a new node in WSNs or make a node in WSNs invalid, and it cannot completely solve problems with strong mobility. However, with 6LoWPAN-based IPv6-WSN proposal [2], IPv6-based wireless sensor network mobility management scheme is developing. 6LoWPAN [3] working group was created by Internet Engineering Task Force (IETF). 6LoWPAN protocol became a standard in 2006. The standard specifies an adaption layer above IEEE 802.15.4 MAC and Routing layers to support IPv6 packets’ transmission over IEEE 802.15.4, and network mobility can therefore be supported in WSNs. NEMO can solve problems of network mobility. At the same time, it has the higher efficiency in broadband resource utilization and better service quality assurance. The largest characteristic of NEMO is that when the topology of a network
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