     
I obtained my Ph.D. degree in
2007 from The Department of
Electrical and Computer Engineering at The
Ohio State University under the guidance of Prof. Eylem Ekici, and Prof. Chang-Gun Lee. I
graduated with my Masters Degree in Spring of 2002 from the same
department. I am currently a Senior Systems Developer/Engineer at the Ohio Supercomputer Center.
     
- Multimedia over Wired and
Wireless Networks, Network Security, Human Computer Interaction,
Autonomic Network Management, Distributed Computing, Real-time and
Embedded Systems
- Significant System Building Projects:
- H.323 Beacon: H.323 Beacon is a tool
that can be used to measure, monitor and qualify the performance of
an H.323 videoconference session. It can help an end-user/network
engineer/conference-operator, as a debugging tool by providing
H.323-protocol specific evidence and other information necessary to
troubleshoot Voice and Video over IP (VVoIP) application performance
problems in the network and at the host (end-to-end). The tool is
open source and can run on both Windows and Linux platforms.
- ActiveMon: ActiveMon is an
extensible and customizable software framework for generating and
analyzing active measurements that can be used for routine network
health monitoring. It supports popular active measurement tools that
measure network health metrics such as route changes, delay, jitter,
loss, bandwidth and MOS. Using a scheduler called
"OnTimeMeasure", measurements are initiated in a regulated
and non-conflicting manner between measurement servers distributed at
strategic points in a network. ActiveMon also supports efficient data
storage and uses relevant statistical and visualization analyses
coupled with alarm generation capabilities.
- RICE: RICE is a tool that
supports use-cases involved in remote instrumentation sessions. It
can be used by instructors and researchers to train students or
conduct research on computer-controlled scientific instruments (e.g.
electron microscopes, NMRs, telescopes) from remote locations on the
Internet.
- SMS BOSS:
SMS BOSS is a pilot
application capable of delivering “Personalized SMS Services” to cell
phone users, who would like to have access to their utilities and
other personal information when they are on the road! With an application like this, you
could retrieve/edit “address and phone contacts” information present
on your office computer or you could even “unlock/lock your front
door”! With dual-level security features, an easy-to-use
“services-administration” utility and a framework for developing rich
set of SMS-based applications, many powerful and useful personalized
SMS services could be developed and supported.
- Collected Traffic Traces:
- More than 300 VVoIP
Traffic traces with different network health and end-point settings
with Subjective MOS rankings from 26 sites in 14 countries (Collected
by Prasad Calyam, Mukundan Sridharan and Weiping Mandrawa)
- Over 6 months of Active
and Passive measurements data collected over campus, regional and
national network backbone paths (Collected by Prasad Calyam, Dima
Krymskiy, Mukundan Sridharan and Mark Fullmer)
- Megaconference 2001 and 2004 (World’s
Largest Internet Videoconferences) TCPdump Traces collected at
the switch to which the Accord and Radvision MCUs were connected at
The Ohio State University (Collected by Prasad Calyam and Paul
Schopis)
     
- Peer-reviewed Publications:
- Prasad Calyam, Eylem
Ekici, Chang-Gun Lee, Mark Haffner, Nathan Howes, “A
‘GAP-Model’ based Framework for Online VVoIP QoE Measurement”, Journal of Communications and
Networks (JCN), 2007.
- Prasad Calyam, Nathan Howes,
Abdul Kalash, Mark Haffner, “User
and Network Interplay in Internet Telemicroscopy”, ICST/ACM Immersive
Telecommunications (IMMERSCOM), 2007.
Video: [mov] by OSU, [mov]
by OSC
News Story: [OSU Press Release]
[OSC Press
Release]
Slides: [ppt]
[pdf]
- Prasad Calyam, Mark
Haffner, Eylem Ekici, Chang-Gun Lee, “Measuring
Interaction QoE in Internet Videoconferencing”, IEEE/IFIP Management of
Multimedia and Mobile Networks and Services (MMNS), Proceedings
published in Springer-Verlag Lecture Notes in Computer Science, 2007.
Slides: [ppt]
[pdf]
- Prasad Calyam, Chang-Gun
Lee, Eylem Ekici, Mark Haffner, Nathan Howes, “Orchestrating
Network-wide Active Measurements for Supporting Distributed Computing
Applications”, IEEE
Transactions on Computers Journal (TC), 2006.
- Khaled Salah, Prasad
Calyam, Mohammed Buhari, “Assessing
Readiness of IP Networks to Support Desktop Videoconferencing using
OPNET”, Elsevier Journal of
Network and Computer Applications (JNCA), 2006.
- Wei Yu, Xun Wang, Prasad
Calyam, Dong Xuan, Wei Zhao, "On Detecting
Camouflaging Worms", Annual
Computer Security Applications Conference (ACSAC), 2006.
- Prasad Calyam,
Chang-Gun.Lee, Phani Kumar Arava, Dima Krymskiy, “Enhanced
EDF Scheduling Algorithms for Orchestrating Network-wide Active
Measurements”, IEEE Real-Time
Systems Symposium (RTSS), 2005.
Slides: [ppt]
[pdf]
Slides: [ppt] [pdf]
News Stories: [OSC
Annual Research Report (pg 16)] [OSC SC|05 Press Release]
- Prasad Calyam, Chang-Gun
Lee, “Characterizing
Voice and Video Traffic Behavior over the Internet”, International Symposium on
Computer and Information Sciences (ISCIS), Proceedings published
by Imperial College Press in a
special edition of "Advances in Computer Science and
Engineering" Book Series, 2005.
- Prasad
Calyam,
Chang-Gun Lee, Phani Kumar Arava, Dima Krymskiy, David Lee, “OnTimeMeasure:
A Scalable Framework for Scheduling Active Measurements”, IEEE/IFIP Workshop on End-to-End
Monitoring Techniques and Services (E2EMON), 2005.
- Andrei Sukhov, Prasad Calyam, Warren Daly,
Alexander Illin, “Towards an Analytical
Model for Characterizing Behaviour of High-speed VVoIP Applications”,
TERENA Networking Conference
(TNC), Proceedings published by PSNC in a special edition of
“Journal of Computational Methods in Science and Technology”, 2005.
Slides: [ppt]
[pdf]
Video: [wmv]
- Prasad
Calyam, Dima
Krymskiy, Mukundan Sridharan, Paul Schopis, "TBI:
End-to-End Network Performance Measurement Testbed for
Empirical-bottleneck Detection", IEEE Testbeds and Research Infrastructures for the
Development of Networks and Communities (TRIDENTCOM), 2005.
Slides: [ppt] [pdf]
- Andrei Sukhov, Prasad Calyam, Warren Daly,
Alexander Illin, "Network Requirements for
High-Speed Real-Time Multimedia Data Streams", IPv6 Global Summit, 2004.
- Prasad
Calyam,
Weiping Mandrawa, Mukundan Sridharan, Arif Khan, Paul Schopis, “H.323
Beacon: An H.323 application related end-to-end performance
troubleshooting tool”, ACM
SIGCOMM 2004 Workshop on Network Troubleshooting (NetTs), 2004.
Slides: [ppt]
[pdf]
News Stories: [Wainhouse
Research] [Megaconference
V Press Release] [Internet2
Report]
- Prasad Calyam, “Provisioning
and Analysis of Application-specific Internet Measurements”,
Ph.D. Dissertation – Supported by Ohio Board of Regents, Ohio
Supercomputer Center, American Distance Education Consortium, and
Internet2, 2007.
- Prasad Calyam, Loki
Jorgenson, “Network
Performance Infrastructures – Part-II”, Apparent Networks
Technical Whitepaper, 2007.
- Prasad Calyam, Steve
Gordon, Myung-je, Denis Walsh, “2006
ECOM-Ohio Study”, OSC Technical Report prepared for the Ohio
Department of Development, 2006.
- Prasad Calyam, Phani Kumar
Arava, Nathan Howes, Siddharth Samsi, Chris Butler, Jeff Jones,
“Network Tuning and Monitoring for Disaster Recovery Data Backup and
Retrieval”, OSC Technical Whitepaper, 2005. (Presented at SUN SuperG
Meeting)
- Prasad
Calyam, Loki
Jorgenson, “Network
Performance Infrastructures – Part-I”, Apparent Networks
Technical Whitepaper, 2003.
- Prasad Calyam, “Performance
Measurement and Analysis of H.323 Videoconferencing Traffic”,
M.S. Thesis - Supported and Published by American Distance Education
Consortium (ADEC), 2002.
  
- “Remote Instrumentation Collaboration
Environment (RICE) for Online Training and Research”, SLOAN-C
International Conference on Online Learning, Orlando, 2007.
- “Telemicroscopy Performance Measurements”,
Internet2 Fall Member Meeting, Chicago,
2006.
- “State-wide Disaster Recovery for Ohio’s Higher Education”, Windows on the Future,
Columbus,
2006.
- “AppareNet Deployment at OARnet”, Apparent
Networks User Conference, Whistler, Canada, 2006.
- “Measurement
Infrastructure Deployment Experiences @ OARnet”, Internet2/ESCC
Joint Techs, Albuquerque,
2006.
- “Broadband
101: An Introduction to Broadband Technologies”, Ohio Department
of Development Broadband Basics Workshop, Wooster, 2005.
- “Voice and
Video over IP”, OSU-CSE 679 Class Lecture,
2002/2003/2004/2005/2006/2007.
- “Network
Router Architectures”, OSU-CSE 677 Class Lecture, 2005/2006/2007.
- “Tools
Tutorial: Troubleshooting Voice and Video Performance over IP using
Measurement Tools”, Internet2 Joint Techs, Salt Lake City, 2005.
- "What's
happening in Networking Research Today?", OARTech, 2004.
- "Third Frontier
Network Measurement Project", Internet2/ESCC Joint Techs, Columbus, 2004.
- "Voice and Video
Performance over an IP-based Satellite Link", Internet2/ESCC Joint Techs, Columbus,
2004.
- “How Friendly is the
Internet to Videoconferencing”, National Internet2 Day, Columbus,
2004.
- “E2E
Measurement Issues for VoIP Systems”, Internet2 VoIP Workshop, Indianapolis,
2003.
- “Network
Measurement Infrastructures: Motivations and Challenges”, Internet2/ESCC
Joint Techs, Kansas, 2003.
- “H.323 Beacon: An
end-to-end H.323 performance monitoring tool”, Internet2 Fall Member
Meeting, Los
Angeles, 2002.
- “Network
Monitoring: Understanding the Application”, Windows on the Future:
Meaningful Performance - End-to-End, Columbus,
2002.
- "The
Reality and Mythology of QoS and H.323", Megaconference III - The World's Largest Internet Conference, 2001.
  
- "PARAM"- The
Indian Western Fusion Music Band I founded at OSU!
- OSU Research
News, 2007
- OSU Home Page, 2007
- OSC Annual
Research Report, 2007 (pg 23 and pg 35)
- OSC
Annual Research Report, 2006
(pg 16)
- Activemon SC|05 Demo
Press Release, 2005
- OSU Research
News, 2004
- OSU
News in Engineering Magazine, 2004 (pg 22)
- National
Internet2 Day Press Release, 2004
- Megaconference V Press
Release, 2003
- Employee Profile Section
of the OARnet Newsletter, 2003 (pg 3)
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