A scheme to support mobility for IP based sensor networks

Wireless Sensor Network (WSN) that comprise low end devices (power, battery, cost, and life) are becoming increasingly important because they are poised to render a broad range of military and other commercial applications such as in Personal Area Networks (PANs). Amongst the various tiers of network connectivity, it is the IP-based Internet access that has truly enabled the ubiquity of these PANs. As many exciting applications emerge, that benefit from such IP connectivity, their burgeoning role necessitates provisioning of these applications beyond their local vicinity---entailing mobility. In order to keep network connectivity intact especially while the sensor nodes move, definition and provision of a mobility scheme for such low end devices is a crucial problem. In this paper we have analyzed various mobility scenarios for the low end devices, specifically the IEE802.15.4 devices. We have objectively analyzed the scalability of the system using the throughput and delay measures for benchmarking their performance under the influence of mobility. The several numerical results for various mobility scenarios substantially support the efficacy of our scheme.