Ultra Low Power Systems

Sensor Network Processor / Network Simulator	Board

We are investigating the use of asynchronous circuits to attain ultra low power operation. The goal is to design a completely self-contained self-powered system. We collaborate with colleagues that have experitise in analog circuit design, MEMS and micro-battery design, and communications so that the entire system is appropriately architected.

My group has designed a processor that uses an instruction set optimized for network protocol execution which can be connected to an actual RF data link so that we can implement an efficient sensor node. The net result is a highly efficient microprocessor optimized for sensor network applications. This is the first published design of a microprocessor optimized for sensor networks.

We co-organized a workshop on sensors and sensor networks at Cornell (June 2003).

Collaborators

Prof. Alyssa Apsel

Prof. Amit Lal

Prof. Anna Scaglione

Students

Filipp Akopyan

Virantha Ekanayake (Ph.D. 2005)

Clinton Kelly, IV (Ph.D. 2005)

Carlos Tadeo Ortega Otero

Publications

Christopher LaFrieda and Rajit Manohar. Reducing Power Consumption with Relaxed Quasi Delay-Insensitive Circuits. Proceedings of the IEEE International Symposium on Asynchronous Circuits and Systems, May 2009. (abstract, pdf)

Filipp Akopyan, Rajit Manohar, and Alyssa Apsel. A level-crossing Flash Asynchronous Analog-to-Digital Converter. Proceedings of the 12th International Symposium on Asynchronous Circuits and Systems, March 2006. (abstract, pdf)

Yao-Win Hong, Birsen Sirkeci-Mergen, Anna Scaglione, and Rajit Manohar. Dense Sensor Networks are also Energy-efficient: when `more' is `less'. Proceedings of MILCOM 2005, October 2005. (abstract, pdf)

Virantha Ekanayake, Clinton Kelly IV, and Rajit Manohar. BitSNAP: Dynamic Significance Compression for a Low Power Sensor Network Asynchronous Processor. Proceedings of the 11th IEEE International Symposium on Asynchronous Circuits and Systems, March 2005. (abstract, pdf, ps)

Virantha Ekanayake, Clinton Kelly IV, and Rajit Manohar. An Ultra-low-power Processor for Sensor Networks. Proceedings of the 11th International Conference on Architectural Support for Programming Languages and Operating Systems, October 2004. (abstract, pdf, ps)

Clinton Kelly IV and Rajit Manohar. An Event-Synchronization Protocol for Parallel Simulation of Large-Scale Wireless Networks. Seventh IEEE International Symposium on Distributed Simulation and Real Time Applications, October 2003. (abstract, pdf, ps)

Clinton Kelly IV, Virantha Ekanayake, and Rajit Manohar. SNAP: A Sensor Network Asynchronous Processor. Proceedings of the Ninth International Symposium on Asynchronous Circuits and Systems, pp. 24--33, Vancouver, BC, May 2003. (abstract, pdf, ps)

Rajit Manohar and Anna Scaglione. Power Optimal Routing in Wireless Networks. IEEE International Conference on Communications, pp. 2979--2984, Anchorage, AK, May 2003. (abstract, pdf)

Rajit Manohar and Clinton Kelly IV. Network on a Chip: Modeling Wireless Networks with Asynchronous VLSI. IEEE Communications Magazine, pp. 149--155, November 2001. (abstract, pdf, ps)