Master of Science, Seoul National University, 1986. Doctor of Philosophy, University Pennsylvania, 1991.
Professor Seoul National University, Republic of Korea, since 1994. Technical staff American Telephone & Telegraph Company Bell Laboratories, Red Hill, New Jersey, 1991—1994. Editor Jounal of Communications and Networks, Republic of Korea, since 2001.
Tpc Institute of Electrical and Electronics Engineers Conferences INFOCOM'04, GLOBECOM'04, WCNC'04, PIMRC'04, 2004. Chair of internet research committee KICS, Seoul, Republic of Korea, 1999. Chair of humantech prize (network division) Samsung, Republic of Korea, 2004.
2nd lieutenant United States Army, 1986-1987, Korea.
Group leader Hana Baptist Church, Seoul, Republic of Korea, 2003. Member of Institute of Electrical and Electronics Engineers (associate).
Married Kyung Lee, March 4, 1989. Children: David, Soun.