To view upcoming colloquiums, please visit http://eecs.oregonstate.edu/graduate/colloquium/. Please note that Friday's colloquium will be in Owen 106.
Friday January 28 9:00 - 9:50 AM Owen 106 Dr. J. Rockey Luo Research Associate Institute for Systems Research University of Maryland, College Park On the Throughput, Capacity and Stability Regions of Random Multiple Access in Wireless Networks This talk focuses on the finite-terminal random multiple access in wireless networks. We characterize the relations among the throughput region of random multiple access, the capacity region of multiple access without code synchronization, and the stability region of ALOHA protocol, all over a standard multi-packet reception (MPR) channel. We first show that if the MPR channel is standard, the throughput region is co-ordinate convex. We then study the information capacity region of multiple access without code synchronization, and show that the asymptotic capacity region equals the throughput region. Next, we study the stability region of ALOHA protocol. For a class of packet arrival distributions, we show that the stationary distribution of the queues possesses the positive and strong positive correlation properties; and this consequently gives an outer bound to the stability region. We also show that if a conjectured "sensitivity monotonicity" property can be shown for the stationary distribution of the queues, then the equivalence between the closure of the stability region and the throughput region follows as a direct consequence, irrespective of the packet arrival distributions. Biography J. Rockey Luo received the B.S. and M.S. degrees in Electrical Engineering from Fudan University, Shanghai, P.R.China, in 1995 and 1998, respectively. He received the Ph.D. degree in Electrical and Computer Engineering from University of Connecticut in 2002. Since September 2002, he has been a Research Associate with the Institute for Systems Research (ISR), University of Maryland, College Park. His research interests are in wireless networks, wireless communications, energy issues, information theory and signal processing. http://www.isr.umd.edu/~rockey _______________________________________________ Colloquium mailing list [email protected] https://secure.engr.oregonstate.edu/mailman/listinfo/colloquium
