Ö.İleri,Microeconomic Models for Inducing Coop.Enabling Spect. Sharing
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Faculty of Engineering and Natural Sciences


“Microeconomic Models for Inducing Cooperation and Enabling Spectrum Sharing”


Ömer İleri
Department of Communication Systems at KTH, Sweden
Radio Communications Laboratory



Abstract: Algorithms for resource allocation in wireless communication systems aim to most efficiently utilize the available system resources in order to maximize a relevant QoS metric. Such algorithms traditionally focus on physical layer parameters such as transmitter power, coding and modulation only. In reality, economic issues related to service providers and the preferences of users also influence the achieved utilization of resources. In this talk, highlights from two pieces of work related to microeconomic considerations for resource allocation in wireless systems will be presented. In the first part, a pricing scheme for enabling forwarding in self-configuring ad hoc networks will be considered. An autonomous node (selfish) in a wireless network has two disincentives for forwarding data for others: energy expenditure (real cost) and possible delay for its own data (opportunity cost). The scheme develops a joint network-centric and user-centric approach and uses a microeconomic framework based on game theory to encourage forwarding among autonomous nodes by reimbursing forwarding. The second part of the talk will focus on the ongoing "spectrum debate" which explores possible improvements in the way spectrum resources are governed. The two major proposals in the spectrum debate are the "spectrum property rights", proponents of which advocate for private ownership of the spectrum resources, and the "spectrum commons", proponents of which argue that spectrum should be treated as a common property open to all. The ongoing debate is obscured in part due to the lack of precise models for spectrum access as well as a variety of factors involving ideology and taxonomy. Two dynamic spectrum access models which embody certain aspects of both the "spectrum property rights" and the "spectrum commons" approaches will be developed.  The useful studies which are enabled through these models will be presented through illustrative results via the bandwidth utilization achieved under each model. These simple yet exemplifiermodels provide a foundation for more realistic engineering models that can shape spectrum policy.


Bio: Ömer İleri (omer.ileri@ieee.org) received the B.S. degree (honors) in electrical/electronic engineering from Boğaziçi University, İstanbul, Turkey in 2001 and the M.S. and Ph.D. degrees in electrical and computer engineering from Rutgers University, New Brunswick, NJ, in 2003 and 2007, respectively. During his Ph.D. studies, he was with the Wireless Information Network Laboratory (WINLAB), Rutgers University. He was a summer intern in Bell Laboratories, Lucent Technologies in Holmdel, NJ, in 2005. He is currently joining the Radio Communications Laboratory at the Department of Communication Systems at KTH, Sweden, as a post-doctoral research fellow. His research interests lie in the broad areas of wireless networks and communications, radio resource management,
and communication networks economics.


August 06, 2007, 14:40, FENS G035