Date Added: Aug 2010
Wireless Sensor Network (WSN) applications such as patients' health monitoring in hospitals, location-aware ambient intelligence, and industrial monitoring /maintenance or homeland security require the support of mobile nodes or node groups. In many of these applications, the lack of network connectivity is not admissible or should at least be time bounded, i.e. mobile nodes cannot be disconnected from the rest of the WSN for an undefined period of time. In this paper, the authors aim at reliable and real-time mobility support in WSNs, for which appropriate handoff and re-routing decisions are mandatory. This paper drafts a mechanism and correspondent heuristics for taking reliable handoff decisions in WSNs.