Past Research Areas

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Cognitive Radio Communications and Networking

Cognitive radio technology enables more flexible and efficient spectrum utilization, and leads to new challenges and opportunities for designing next generation wireless networks. 

Wireless Interference Management

We study various interference management techniques such as power control, SINR optimization, and link scheduling for wireless networks.

Wireless Medium Access Control


Network Optimization


Wireless Video Communications

We design new resource allocation schemes for video communications over wireless networks by intelligent exploitation of content, time, and frequency diversities.

DSL Spectrum Management

Digital subscriber line (DSL) technology is one of the main choices for wired broadband access networks. We propose distributed spectrum management algorithms that achieve a near optimal capacity region with low complexities for next generation DSL networks.

Cooperative communications take advantage of the broadcast nature of wireless channels, use relay nodes as virtual antennas, and thus realize the benefits of multiple-input-multiple-output communications in situations where physical multiple antennas are difficult to deploy.

Network Key Management

Key management is important in supporting secure communications in light weight wireless ad hoc networks