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Τίτλος: Incentive Mechanisms for Hierarchical Spectrum Markets

Ομιλητής: George Iosifidis (University of Thessaly, GR)

Ιστοσελίδα ομιλητή: http://georgeiosifidis.net/

Ημερομηνία: 07/06/2012

Ώρα: 16:00

Αίθουσα:  Aίθουσα Συνεδριάσεων A56, Τμήματος Πληροφορικής και Τηλεπικοινωνιών

Σύνοψη:

Nowadays, it is common belief that the current coarse and static spectrum management policy creates a spectrum shortage. While this resource is expensive and scarce, significant amount of the reserved spectrum remains idle and unexploited by legitimate owners A prominent proposed solution is the reform of the spectrum allocation policy and the deployment of dynamic spectrum (DS) markets. This is expected to increase spectrum utilization and already several related business models exist in the market. However, the market-based solution is not a panacea and should be carefully applied.

In this talk,  we will discuss spectrum allocation mechanisms in hierarchical multi-layer DS markets which are expected to proliferate in the near future based on the current spectrum policy reform proposals. We consider a setting where a state agency sells spectrum channels to Primary Operators (POs) who subsequently resell them to Secondary Operators (SOs) through auctions. We show that these hierarchical markets do not result in a socially efficient spectrum allocation which is aimed by the agency, due to lack of coordination among the entities in different layers and the inherently selfish revenue-maximizing strategy of POs. In order to reconcile these opposing objectives, we propose an incentive mechanism which aligns the strategy and the actions of the POs with the objective of the agency, and thus leads to system performance improvement in terms of social welfare. This pricing-based scheme constitutes a method for hierarchical market regulation and allows the network designer, the agency, to improve the efficiency of the hierarchical channel allocation.

Σύντομο Βιογραφικό:

George Iosifidis holds an Engineering Degree in Telecommunications (Greek Air Force Academy, 2000) and a M. Sc. in communication networks (University of Thessaly, 2007). He recently completed his PhD studies in University of Thessaly under the supervision of Prof. Iordanis Koutsopoulos. His research interests are in the area of network economics and network optimization with emphasis on overlay networks and spectrum management.