| |
ASPIRE: Antipodal Staged Processing in Role-adaptive Embedded Systems |
This project investigates how to leverage the complimentary features of a large variety of processors, radios and sensors (low-power vs. power-efficient) to design sensor nodes that can operate over a high dynamic range. With such functionality, nodes can dynamically assume roles inside a sensor network, switching from cluster head to leaf nodes in a power efficient manner. ASPIRE is a collaborative project between UMASS Amherst (Deepak Ganessan, Mark Corner and Prashant Shenoy), UCLA (Mani Srivastava) and Yale (Andreas Savvides).
ENALAB's goals for ASPIRE is to design a new interconnect architecture that would allow the node to dynamically switch between low-end and high-end processors, low-bandwidth (low -power) and high-bandwidth (power-efficient) radios and a wide variety of sensors.
To analyze different design alternatives, we have developed detailed node lifetime models for trigger-driven and schedule driven operation. These models are based on Semi-Markov chains and account for the energy overheads incurred by a node while transitioning from fully active to various low power states as well as the event arrival rates in different applications. Using these models we have developed a tool that aims to expose how each parameter (architectural and application) can affect lifetime. By revealing these trends and by performing a side-by-side comparison of alternative architectures, we are now in the process of designing an appropriate interconnect that will link together multiple processors, radios and sensors into a single versatile node architecture that can dynamically change its role from low level, low power leaf node, to a powerful cluster head without compromising energy performance performance.
MATSNL is a MATLAB tool for performing node lifetime analysis based the node lifetime models we have developed. For the most recent documents and code downloads, please visit our MATSNL site.
D. Jung, T. Teixeira, A. Barton-Sweeney and A. Savvides, Model- Based Design Exploration of Wireless Sensor Node Lifetimes, Proceedings of the Fourth European Conference on Wireless Sensor Networks, EWSN 2007, January 29-31, Delft, Netherlands (slides)
D. Jung, T. Teixeira and A. Savvides, Sensor Node Lifetime Analysis: Models and Tools, under submission