For network optimization and multimedia networking, the research topics include multicast routing, network coding, resource planning, and cross-layer design with analysis. Research results have spanned various kinds of networks, such as software-defined networks (SDN), heterogeneous wireless cellular networks, wireless mesh networks, peer-to-peer networks, satellite networks, Internet backbone, and wavelength division multiplexing (WDM) optical networks.
For network analysis and social network applications, the research topics include detection and group therapy of social networks mental disorder, social influence propagation, query processing, privacy preserving, and viral marketing.