Wireless Networking and Communications
We are interested in a wide range of topics in wireless networking and communications in both single-hop and multi-hop networks. For single-hop wireless networks, we have done research on queuing performance analysis of dynamic schedulers using asymptotic approximation based on large-deviations theory. We have also studied OFDMA (Orthogonal Frequency Division Multiple Access) systems, in particular, in a) showing delay-optimality of a dynamic load-balancing scheduler in multi-queue multi-server systems; b) studying dynamic scheduling of OFDMA subcarriers with partial feedback of the channel information but full knowledge of queue information; c) studying the interplay between rate-adaptive sources such as TCP and dynamic OFDMA schedulers.
For multi-hop wireless networks, we have studied road emergency message broadcasting in vehicular networks to avoid road accidents.
Optimization and Smart Grid
We are interested in smart demand response which automatically arranges usages of appliances in a household or buildings. This demand response is a major part of the future power systems, known as smart grids.