Wonsang Song
Wonsang Song
Who am I?

I am a Ph.D. candidate in the department of Computer Science at Columbia University. My advisor is Professor Henning Schulzrinne. I've been working at Internet Real Time Lab since Summer 2005 when I was a M.S. student. I got my M.S. degree from the department of Computer Science at Columbia University in February 2006.

Before coming to New York, I co-founded Neogenius, a software start-up in Seoul, Korea, and worked as a software developer and a project manager for over four years. I learned many lessons from this experience, such as how to realize an early stage idea, how to lead people, and how to manage a company.

I got my B.S. degree from the department of Computer Engineering at Seoul National University, Seoul, Korea, in February 1997.

What am I doing?
Currently I'm working on indoor location research. Especially, we want to determine a person's floor location in buildings. Our approach is using multiple sensors in today's smartphones to trace a person's vertical movement. We augment this sensor-based dead reckoning with intrastructure support, such as entrance and location beacons deployed in buildings.

My previous project was the Next Generation 9-1-1 Project (NG9-1-1) in which we have built a prototype system to handle emergency calls over VoIP networks. Our system was deployed and tested at five real PSAPs as a part of US DOT's NG9-1-1 Initiative program. My contributions are designing and implementing psapd, which is an automatic call distributor at PSAP, and implementing LoST server from scratch, which finds an proper PSAP based on caller's location.
Phone: +1-415-580-2452
Mailing address: Twilio
645 Harrison St. 3F
San Francisco, CA 94107

Last modified: 05/18/2014     © Columbia University