Conferences Committee
- Publicity Co-Chair, The 12th Annual International Conference on Mobile Computing and Networking (MobiCom'2006)
- Publication Chair, The 6th ACM Annual International Conference on Mobile Ad Hoc Networking and Computing (MobiHoc'2005)
- Program Committee, The 2005 International Symposium on Applications and the Internet (SAINT'2005)
- Area Chair, The 10th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS'2004)
- Program Committee, The 1st International Conference on Mobile Ad-hoc and Sensor Systems (MASS'2004)
- Program Committee, The 5th ACM Annual International Conference on Mobile Ad Hoc Networking and Computing (MobiHoc'2004)
- Program Committee, The 9th ACM Annual International Conference on Mobile Computing and Networking (MobiCom'2003)
- Program Committee, The 2003 International Symposium on Applications and the Internet (SAINT'2003)
- Program Committee, ICDCS 2003 workshop on mobile and wireless network (MWN)
- Treasurer, MobiCom Workshop on Wireless Security (WiSe), 2002, 2003, 2004, 2005
- Program Committee, the 19th IEEE International Performance, Computing and Communications Conference (IPCCC'2000)
- Program Committee, the 10th IEEE Workshop on Research Issues in Data Engineering (RIDE'2000)
- Steering Committee, the 4th IEEE Workshop on Satellite-Based Information Services (WOSBIS'99)
- Program Committee, the 3rd ACM International Workshop on Satellite-based Information Services (WOSBIS'98)
- Program Committee Chair, the 2nd ACM International Workshop on Satellite-based Information Services (WOSBIS'97)
- Program Committee, the 5th International Conference on Computer Communications and Networks (ICCCN'96)
- Program Committee, the 1st International Workshop on Satellite-based Information Services (WOSBIS'96)
- Session Chair, 1996 IASTED International Conference on Networks
- Session Chair, the 4th International Conference on Computer Communications and Networks (ICCCN'95)
- Program Committee, 1994 IEEE International Workshop on Parallel and Distributed Systems (PADS)
- Session Chair, the 2nd International Conference on Information and Knowledge Management (CIKM'93)
Industry Standardization Committees
- Co-Founder & Co-Chair, IETF (Internet Engineering Task Force) UDLR working group
- Active involvement in IETF working groups: IPSEC, PILC, TCPSAT, UDLR
Journal Review
- ACM/IEEE transactions on Networking
- IEEE transactions on Mobile Computing
- IEEE transactions on Wireless Communications
- IEEE JSAC
- ACM MC2R - Mobile Computing and Communications Review
- ACM MONET Journal - Mobile Networks and Applications (Kluwer)
- Software Practice & Experience (Wiley)
- Computer Networks (Elsevier)
Government Funding Review
- NSF
- Army Research Office
- Hong Kong Government University Grant Council
Invited Talks
- An Experimentation Platform for Studying Mobile Ad-Hoc Networks, Department of Computer Science, UCSB, Nov 2004
- An Implementation and Experimentation Study of XCP, ISI/USC, Aug 2004
- An Experimentation Platform for Studying Mobile Ad-Hoc Networks, Department of Computer Sciences, UCLA, Mar 2004
- An Experimentation Platform for Studying Secure Mobile Ad-Hoc Networks, Department of Computer Sciences, Purdue University, Feb 2004
- Intrusion Detection in Mobile Ad-Hoc Networks, Department of Computer Science, University of Manchester, Manchester, U.K., Jun 2002
- A Multilayer IPSEC Protocol, Department of Computer Science, Texas A&M University, Nov 2000
- A Multilayer Security Architecture, Telcordia, Morristown, NJ, Jun 2000
- Proxies and Satellite Networks, End-to-End Workshop, Sun Microsystems, Palo Alto, CA, Jul 1998
- Introduction to UDLR, IP Multicast Summit, San Jose, CA, Feb 1998