During 2004-2005, I have worked with a group of talented intern students at Microsoft Research Asia:
I also collaborated with Jun Zhao from Microsoft Research Asia on HDMAC protocol design; Prof. Ben Y. Zhao from Univ. of  California, Santa Barbara, and Dr. Zhengsheng Zhang from San Diego Research Center on spectrum management; and Prof. Xiaodong Wang (Columbia University), Prof. Victor Li from Hong Kong University, Dr. Wenwu Zhu from Intel Research on general MAC layer issues.