Welcome to Home page of Vishal Kumar Singh

I was a research staff in CS at Columbia University, My advisor is Prof. Henning Schulzrinne.

In the recent past, I was doing research in the area application management(failure and performance) for end user applications and applications deployed in cloud environment. For more details on end user application diagnosis, Please visit Dyswis (paper) and also see QoEScope (which determines cause of quality of experience deterioration in real time conferencing application. I also investigated use of virtualization for scalability and reliability of VoIP and issues related to it.

In the past, I worked on SIP/SIMPLE based presence technology. More details can be found at Presence Project Page. We developed benchmarking standard for presence server called as SIMPLEstone, scalability architecture for presence deployment, presence traffic optimization techniques and applied presence in different application(SABIT) scenarios.


Conference Papers

  • Min Ding, Vishal Singh, Yueping Zhang, and Guofei Jiang, "Application Dependency Discovery Using Matrix Factorization," IEEE/ACM IWQoS (short paper), June 2012.
  • Zhenyu Wu, Yueping Zhang, Vishal Singh, Guofei Jiang, and Haining Wang, "NetDEO: Automating Network Design, Evolution, and Optimization," IEEE/ACM IWQoS, June 2012.
  • Devdutt Patnaik, Ashish Bijlani and Vishal Singh, "Towards High-Availability for Enterprise IP Telephony using Virtual Machines", IMSAA 2010, Bangalore, India, Dec 2010.
  • Y Gu, G. Jiang, Vishal Singh, Yueping Zhang, "Optimal Probing for Unicast Network Delay Tomography",INFOCOM 2010, San Diego, CA, March 2010.
  • Yueping Zhang, Vishal Singh, Yu Gu, and Guofei Jiang, "Adaptive IP Service Management for Large-Scale Heterogeneous Networks", in proceedings in IWQoS 2009.
  • Vishal Kumar Singh, Henning Schulzrinne and Piotr Boni,"A New SIP Event Package For Group Membership Management in Advanced Communications",(awarded as 3rd best paper) in proceedings of IMSAA 2008, Bangalore, India.
  • Vishal Kumar Singh, Henning Schulzrinne and Kai Miao, "DYSWIS: An Architecture for Automated Network Diagnosis", in proceedings of IEEE/IFIF NOMS’2008, Salvadore, Brazil.
  • Vishal K. Singh, Henning Schulzrinne, Piotr Boni, Boris Elman and David Kenneson, "Presence Aware Location-Based Service For Managing Mobile Communications", IEEE’s CCNC, Jan 2007.
  • Kai X. Miao, Henning Schulzrinne, Vishal Kumar Singh and Qianni Deng, "Distributed Self Fault-Diagnosis for SIP Multimedia Applications", IFIP/IEEE Management of Multimedia and Mobile Networks and Services, Oct 2007.
  • Shruti L. Gandhi, Vishal K. Singh, Henning Schulzrinne, "Analyzing User Behavior in Instant Messaging", Annual Conference of ITA (Information Technology Alliance), 2007.
  • J Shiva Shankar, Vishal Kumar Singh, Damodar P., "SNMP Over SIP - The future of Network Management", IEEE/IFIP Network Operations and Management Symposium, April 2004, Seoul, Korea.
  • Vishal Kumar Singh, Shiva Shankar J and Damodar P., "Distributed Agent Architecture for IP telephony availability", Technical Report, 2004.

    US Patents

  • US 7,733,769 Method and apparatus for identifying a media path in a network. http://assignments.uspto.gov/assignments/q?db=pat&pat=7733769
  • US 7,525,952 Method and apparatus for determining the source of user-perceived voice quality degradation in a network telephony environment. http://assignments.uspto.gov/assignments/q?db=pat&pat=7525952
  • US 8,031,628 Optimal probing for unicast network delay tomography.
  • 8031628, OPTIMAL PROBING FOR UNICAST NETWORK DELAY TOMOGRAPHY http://assignments.uspto.gov/assignments/q?db=pat&pub=20100118715
  • 8443080, SYSTEM AND METHOD FOR DETERMINING APPLICATION DEPENDENCY PATHS IN A DATA CENTER http://assignments.uspto.gov/assignments/q?db=pat&pat=8443080
  • SYSTEMS AND METHODS FOR APPLICATION DEPENDENCY DISCOVERY (in the process of assignment) http://assignments.uspto.gov/assignments/q?db=pat&pub=20120191843
  • Data Processing: US 20140064066 A1 http://www.google.com/patents/US20140064066
  • Network Management US 9253042 B2 http://www.google.com/patents/US9253042
  • Network Self-Protection US 20130176852 A1 https://www.google.com/patents/US20130176852
  • Policy-Aware Based Method for Deployment of Enterprise Virtual Tenant Networks, US 20130185438 A1 https://www.google.com/patents/US20130185438

    Patents Pending

  • Communicating network management information using session initiation protocol architecture. Patent pending (US 20060123103) http://assignments.uspto.gov/assignments/q?db=pat&pub=20060123103
  • OFSense: Light-Weight Networking Sensing With OpenFlow http://assignments.uspto.gov/assignments/q?db=pat&pub=20130185419
  • FlowSense: Light-Weight Networking Sensing With OpenFlow http://assignments.uspto.gov/assignments/q?db=pat&pub=20130191530

    Technical Reports

  • Vishal Kumar Singh, Henning Schulzrinne, Markus Isomaki and Piotr Boni, "Presence Traffic Optimization Techniques", Columbia University Technical Report CUCS-041-06, New York, NY, Nov 2006.
  • Vishal Kumar Singh and Henning Schulzrinne, "A Survey of Security Issues and Solutions in presence", Columbia University Technical Report CUCS-019-06, New York, NY, Feb 2006.
  • Vishal Kumar Singh and Henning Schulzrinne, "SIMPLEStone – A Presence Server Benchmarking Standard", Columbia University Technical Report CUCS-023-06, New York, NY, Feb 2006.
  • Vishal Kumar Singh and Henning Schulzrinne, "Presence Server Scalability Architectures".


  • H. Schulzrinne, V. Singh, H. Tschofenig, M. Thomson, "Dynamic Extensions to the Presence Information Data Format Location Object (PIDF-LO)", http://www.rfc-editor.org/rfc/rfc5962.txt>RFC 5962, Sept 2010.

    Internet Drafts

  • A. Houri, E. Aoki, S. Parameswar, V. Singh and H. Schulzrinne, "Presence Interdomain Scaling Analysis for SIP/SIMPLE", Aug 2009.
  • A. Houri, V. Singh, S. Parameswar and E. Aoki, H Schulzrinne, "Scaling Requirements for Presence in SIP/SIMPLE", Sept 2009.
  • V. Singh, H. Schulzrinne and P. Boni, "Vehicle Info Event Package", July 2007.
  • V. Singh, H. Schulzrinne and P. Boni, "Membership Event Package", July 2008.


  • Talk@IMSAA 2010
  • Slides@IWQoS 2009
  • Talk@IMSAA 2008
  • Poster@NOMS
  • Poster @ ITA on IM Analysis 2007
  • Talk@CCNC 2007
  • Poster@CATT
  • SIMPLE Presence Tutorial
  • Talk@IRT LAB
  • Presentation@IETF Presence Traffic
  • Talk@Verizon

    Past Projects

    You can read about some of my past projects here


    Aghor Guru Peeth Ashram (Banora, India)
    Aghor Ashram (Sonoma, CA)
    Pictures from Aghor Ashram at Banaura, India
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