Wanyang Dai
Nanjing University, China
Title : Optimal Rate Scheduling via Utility-Maximization for J-User MIMO Markov Fading Wireless Channels with Cooperation
Abstract :
Abstract: We design a dynamic rate scheduling policy of Markov type via the solution (a social optimal Nash equilibrium point) to a utility-maximization problem over a randomly evolving capacity set for a class of generalized processor-sharing queues living in a random environment, whose job arrivals to each queue follow a doubly stochastic renewal process (DSRP). Both the random environment and the random arrival rate of each DSRP are driven by a finite state
continuous time Markov chain (FS-CTMC). Whereas the scheduling policy optimizes in a greedy fashion with respect to each queue and environmental state and since the closed-form solution for the performance of such a queueing system under the policy is difficult to obtain, we establish a reflecting diffusion with regime-switching (RDRS) model for its measures of performance. Furthermore, we justify its asymptotic optimality through deriving the stochastic fluid and diffusion limits for the corresponding system under heavy traffic. In addition, we identify a cost function related to the utility function, which is minimized through minimizing the workload process in the diffusion limit. More importantly, our queueing model includes typical systems in the future wireless networks, such as, the J-user multi-input multi-output (MIMO) multiple access channel (MAC) and the broadcast channel (BC) under Markov fading with cooperation and
admission control as special cases.
Biography :

Prof. Wanyang Dai received the Ph.D degree in applied mathematics jointly with industrial engineering and systems engineering from Georgia Institute of Technology, Atlanta, GA, U.S.A., in 1996, where he worked on stochastics and applied probability concerning network performance modeling and analysis, algorithm design and implementation via stochastic diffusion approximation. In addition, he received the B.S. degree in mathematics from Nanjing Normal University, Nanjing, China, in 1985 and the M.S. degree in operations research and control theory from Shanghai University, Shanghai, China, in 1988.

He was an assistant professor in Probability and Statistics Group of Mathematics Department in Nanjing University, Nanjing, China, from 1988 to 1992, where he mainly worked on stochastic adaptive control and system identification. He was an MTS (permanent) in End-to-End Network Architecture Department of AT&T Bell Labs and then (Alcatel-)Lucent Bell Labs/Network Systems, Atlanta, GA and Warren, NJ, U.S.A., from 1996-1999, where he was a principal investigator and developer of several projects in telecommunication network architecture and design, network performance and financial engineering, operating system and database development, etc. He was an associate professor from 1999-2004 and is a full professor since 2004 in Nanjing University, where his research includes stochastic processes related optimization and optimal control, mathematical finance, admission/scheduling/routing protocols and performance analysis/optimization for cloud computing and the next generation of wireless and wireline communication systems, forward/backward stochastic (ordinary/partial) differential equations and their applications to queueing systems, communication networks and financial engineering.
Currently, he is an editor of International Greener Journal of Computer Science, an editor of International Journal of Internet, Information and Communication Systems, an editor of International Journal of Man, Machine and Technology, a member of Editorial Board of International Journal of Wireless Engineering and Technology, a member of Editorial Board of International Journal of Statistics and Applications (in Chinese), technical program committee (TPC) members of 8 IEEE International conferences in applied and engineering mathematics, wireless and wireline communications, systems and control, etc.
In addition, he also held several visiting positions including a visiting scholar in Academy of Mathematics and Systems Science of China, Beijing, China, in 2001, a Long Term Participant of IMA Annual Program of Probability and Statistics in Complex Systems: Financial Engineering, Communication Networks and Genomics in Institute of Mathematics and Its Applications (IMA), Minneapolis, U.S.A., in 2004, and a visiting professor in Department of Systems Engineering and Engineering Management in Chinese University of Hong Kong, Hong Kong, China, in 2007.

Copyright © 2011-2013 SCET. All rights reserved.
Microsoft Internet Explorer is recommended if the page is not displayed properly !