Priyanga Chamara Gunaratne

Present status:

Alumnus of the Department of Computer Science and Engineering at the University of South Florida. My graduate adviser was Prof. Ken Christensen. I successfully defended my dissertation on December 8th, 2006 and I formally graduated in May 2007.

Research work:

My Ph.D. research work is in the areas of performance evaluation and capacity planning of computer systems and reducing the power consumption of computer systems through the use of dynamic power management. I have studied means of reducing the power consumption of network links and networked devices as part of the National Science Foundation funded Energy Efficient Internet project. This work has directly contributed to the formation of the IEEE 802.3 Energy Efficient Ethernet Study Group. Previously I had worked on how to fairly allocate limited bandwidth to multiple web users. Please click here for more information about my research work and some tools and software.

Dissertation:

Ph.D. dissertation: "Design and Evaluation of New Power Management Methods to Reduce Direct and Induced Energy Use of the Internet" [PDF]

Dissertation defense slides: [PDF]

Publications:

• C. Gunaratne, K. Christensen, S. Suen, and B. Nordman, "Reducing the Energy Consumption of Ethernet with an Adaptive Link Rate (ALR)," to appear in IEEE Transactions on Computers.
• C. Gunaratne, K. Christensen, and S. Suen, "Ethernet Adaptive Link Rate (ALR): Analysis of a Buffer Threshold Policy," Proceedings of IEEE GLOBECOM 2006, November 2006. [PDF]
• C. Gunaratne and K. Christensen, "Ethernet Adaptive Link Rate: System Design and Performance Evaluation," Proceedings of the 31st IEEE Conference on Local Computer Networks, pp. 28-35, November 2006. [PDF]
• C. Gunaratne, K. Christensen, and B. Nordman, "Managing Energy Consumption Costs in Desktop PCs and LAN Switches with Proxying, Split TCP connections, and Scaling of Link Speed," International Journal of Network Management, Vol. 15, No. 5, pp. 297-310, September/October 2005. [PDF]
• C. Gunaratne and K. Christensen, "A New Predictive Power Management Method for Network Devices", IEE Electronics Letters, Vol. 41, No. 13, pp.775-777, June 2005.
• K. Christensen, C. Gunaratne, B. Nordman, and A. George, "The Next Frontier for Communications Networks: Power Management", Computer Communications, Vol. 27, No. 18, pp. 1758-1770, December 2004. [PDF]
• G. Dias, and C. Gunaratne, "Using Dynamic Delay Pools for Bandwidth Management," Proceedings of the 7th International Workshop on Web Content Caching and Distribution, pp. 171-176, August 2002.

Presentations:

• "Ethernet Adaptive Link Rate (ALR): Analysis of a Buffer Threshold Policy," at the IEEE GLOBECOM 2006 in San Francisco, November 2006. [PDF]
• "Ethernet Adaptive Link Rate: System Design and Performance Evaluation," at the 31st IEEE Conference on Local Computer Networks in Tampa, November 2006. [PDF]
• "Optimized bandwidth management using SQUID cache server," at APRICOT 2002 in Bangkok, Thailand, February 2002.

Teaching:

• 2003 Summer CGS 5765 - Introduction to UNIX and C
• 2005 Spring EEL 4781C - Distributed processing and computer networks

Short bio:

I was born in 1974 in Sri Lanka and I studied computer engineering at the University of Moratuwa. I completed my B.Sc. in Engineering in July 2000.

After completing my courses I did an internship for 6 months in Zurich, Switzerland at Interact Consulting AG, writing software for the year 2000 census of Switzerland. Returning to Sri Lanka, I rejoined the University of Moratuwa as a systems engineer and supervised by Dr. Gihan Dias, worked on a research project to optimize the bandwidth usage in Sri Lanka's inter-university network.

In Fall 2002 I joined the University of South Florida in Tampa, Florida as a graduate student to study towards a doctorate in Computer Networking advised by Prof. Ken Christensen.

Please click here for some images of my family and myself.