• Editor
    IEEE Transactions on Mobile Computing, 2003 --
    IEEE Transactions on Wireless Communications, 2002 -- 2005
    Journal on Vehicular Technology, 2006 --
    Journal of Distributed Sensor Networks, 2007 --
  • Guest Editor, ACM MONET special issues on Heterogeneous Wireless Networks, 2006
    Journal of Wireless Information Networks special issue on wireless sensor networks, Springer, 2006
    Ad Hoc Networks special issue on privacy and security in wireless sensor and ad hoc networks, 2009
  • NSF Panel: 2001, 2002, 2003, 2004 (two panels), 2005 (three panels), 2006 (two panels), 2007 (two panels), 2008 (three panels)
  • TPC Chair: IEEE Symposium on Reliable Distributed Systems, 2009
    TPC Vice Chair: IEEE ICDCS 2009
    TPC Area Chair: IEEE Infocom 2008
    General Chair: Int'l Conf. on Mobile and Ubiquitous Systems (MobiQuitous), 2007
    TPC Vice Chair: IEEE Int'l Conf. on Mobile Ad-hoc and Sensor Systems (MASS), 2005
    TPC Co-Chair: International Workshop on Mobile Distributed Computing (MDC), in conjunction with ICDCS, 2003, 2004, 2005, 2007.
  • Program Committee Member (selected)
    ACM MOBICOM 2004 -- 2008
    IEEE INFOCOM 2004, 2005, 2007 -- 2009
    ACM MOBIHOC 2008, 2009
    IEEE Int's Conf. on Pervasive Computing and Communications (PerCom), 2005--2009
    IEEE Int'l Conf. on Distributed Computing Systems (ICDCS), 2001 -- 2004, 2008-2009
    IEEE Conf. on Sensor, Mesh, and Ad Hoc Communications and Networks (SECON), 2006 -- 2008
  • Session chair: ICDCS'02, INFOCOM'04, INFOCOM'05, SECON'04, MOBICOM'06, INFOCOM'07, Mobihoc'08. Local arrangement chair: MOBICOM'04. Finance chair: MOBICOM'05.
  • Regularly serve NSF panel, and review proposals for Army Research Lab, NIH, and Hong Kong Research Council.