Title:
Delay-optimal Fair Scheduling and Resource Allocation in Multi-user Wireless Relay Networks
Date:
Monday, December 19, 2011 at 10:00am
Location:
Room E2-361, EITC, University of Manitoba, Fort Garry Campus
Speaker:
Mohammad Moghaddari
Department of Electrical and Computer Engineering
University of Manitoba, Canada
Abstract:
We consider fair delay-optimal user selection and power allocation for a relay-based cooperative wireless network. Each user (mobile station) has an uplink queue with heterogeneous packet arrivals and delay requirements. Our system model consists of a base station, a relay station, and multiple users working in a time-division multiplexing (TDM) fashion, where per-user queuing is employed at the relay station to make the analysis of such system tractable. We model the problem as an infinite horizon average reward Markov decision problem (MDP) where the control actions are functions of the instantaneous channel state information (CSI) as well as the joint queue state information (QSI) at the mobile and relay stations. To address the challenge of centralized control and huge complexity of MDP problems, we introduce a distributive and low complexity solution. A linear structure is employed which approximates the value function of the associated Bellman equation by the sum of per-node value functions. Our online stochastic value iteration solution converges to the optimal solution almost surely (with probability 1) under some realistic conditions.
Speaker Bio:
Mohammad Moghaddari received his B.Sc. degree in 2006 and M.Sc. degree in 2009, both in Electrical Engineering from Ferdowsi University of Mashhad (FUM), Iran. He began his Ph.D. program in Sept. 2009 where he is currently a Ph.D. student in the Electrical and Computer Engineering at the University of Manitoba, Canada. His research interests lie in cooperative communication networks, queuing analysis, resource allocation and management, wireless MIMO-OFDM systems. He is a Student Member of the IEEE.
Contact:
For questions or more information: Ekram Hossain 474-8908.
