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Attribute-Based Routing in Clustered SNETs

By Wang Ke and Thomas D. C. Little


We posit that SNETs are, like early embedded computing systems, hardwired using minimalist techniques to save energy and minimize system cost and thus lack flexibility and reconfigurability more typical of modern computer system design (hardware and software). While the desire to economize energy consumption for system longevity will dictate spartan hardware resources, we believe there is an opportunity to improve flexibility in system operation, especially in data egress and dissemination within the SNET. We seek to enable flexibility and reconfigurability, conserve energy via limiting unnecessary SNET communications. Our proposal relies on the use of attributed data sourced from individual sensor nodes and the use of attribute-based routing via a set of elected and rotated clusterheads. By understanding the mission requirements of the SNET application we can configure routing pathways that are matched to an energy-efficient topology and sleep-wake schedule for participating nodes. Finally, the attributebased routing rules allow reconfigurabilty and convergence to energy conserving states of the SNET during changing SNET application missions. In this paper we describe the core routing function achieved by our proposal and illustrate how it enables a rich set of capabilities not present in current SNET deployments. 1

Year: 2005
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