My research interests lie in the area of computer networking with the emphasis on wireless networks, mobile networks, and opportunistic networks. The primary objectives of my research are 1) to provide Always-Best-Connectivity (ABC) network service for the mobile users; and 2) to ensure effective data transmission service in intermittently connected networks.
        Specifically, we have studied the issue of interference among various popular wireless technologies through analysis and experiments, and proposed several cross-layer integration approaches to improve application performance in error-prone wireless networks. We have also designed a simple yet practical solution to provide seamless vertical handovers for mobile users, as well as an intelligent decision module to determine the "best" target Internet connection at a time. In addition, we have developed effective routing protocols for delay/disruption tolerant networks, and designed a content-centric approach that combines the strengths of layered coding and multiple description coding to facilitate content sharing in opportunistic networks. Finally, we have investigated the network reliability issue for emerging collaborative wireless communication systems/applications.
        Our ongoing research is focused primarily on providing self-configuration, self-healing, self-optimization, and self-protection mechanisms for data forwarding in opportunistic networks. Moreover, we intend to apply our results to real-world opportunistic networking applications, such as mobile search and rescue nodes in disaster areas (where communication infrastructures have been disabled by earthquakes, hurricanes, wildfires, or flooding), message exchanges in underdeveloped areas (remote towns and villages interconnected by wireless networks, but not guaranteed an always-on Internet connection), and scientific monitoring of wilderness areas (remote monitoring of various forms of wildlife).