 | |  | | Anjur S. (Krishna) Krishnakumar
Director, Networked Systems Research
"Making IP communications secure and reliable is a prerequisite for its wide adoption. The fact that our systems are deployed on a variety of network infrastructures makes it a more challenging and interesting task. My background in wireless networking - a favorite research area of mine - allows me to address security and reliability issues specific to such networks." |
| My Research | My current focus is on the reliability and security of IP communications system. I am interested in the problem of ensuring that the systems we deploy – on existing network infrastructure – can be guaranteed to have a desirable level of reliability and security independent of the characteristics of the underlying network. This requires a different perspective than that usually found in existing research in that we are focusing on the security and resiliency of the components of an overlay system rather than the underlying network itself. I am also interested in various aspects of short-range wireless networking. Topics of specific interest are quality-of-service for real-time traffic such as voice and video as well as location determination. |
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| Projects | Researchers in my group are engaged in projects in different areas. We have a project focusing on improving the reliability and quality of IP communications by exploiting the natural redundancy of IP networks. The IP telephony testing project has developed a testing tool to test the vulnerability of systems. There are research efforts looking at making our system components – and hence the system itself – more resilient to denial-of-service attacks. There is a variety of projects dealing with the Public Key Infrastructure (PKI) and its applications to Identity management, License management etc. |
| Publications | Some of my recent publications include: - A paper on the application of Bayesian networks to location estimation: D. Madigan, W. Ju, P. Krishnan, A.S. Krishnakumar, I. Zorych, “Location Estimation in Wireless Networks: A Bayesian Approach,” to appear in Statistica Sinica.
- An invited paper providing a survey of signal-strength based location estimation in 802.11 networks: A.S. Krishnakumar and P. Krishnan, “The Theory and Practice of Signal Strength-based Location Estimation,” to appear in the Proceedings of CollaborateCom 2005, December 2005.
- A theoretical model to determine the limits of signal-strength based location estimation: A.S. Krishnakumar and P. Krishnan, “On the Accuracy of Signal Strength-based Location Estimation Techniques,” Infocom 2005.
- A technique to provide priority access to non-802.11e-capable terminals in a network consisting also of 802.11e-capable terminals: M. Kappes, A.S. Krishnakumar, P. Krishnan, “MEOW with CATS: Multimedia Extensions over Wireless with CTS-Assisted Transmission Scheme,” WCNC 2005.
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