Distributed Dynamic Spectrum Allocation for Secondary Users in a Vertical Spectrum Sharing Scenario

Distributed Dynamic Spectrum Allocation for Secondary Users in a Vertical Spectrum Sharing Scenario

In this paper, we study the problem of distributed spectrum allocation under a vertical spectrum sharing scenario in a cognitive radio network. The secondary users share the spectrum licensed to the primary user by observing the activity statistics of the primary users, and regulate their transmission strategy in order to abide by the spectrum sharing etiquette. When the primary user is inactiv...

Spectrum sharing through distributed coordination in dynamic spectrum access networks

Spectrum sharing in open spectrum systems is a challenging problem, particularly since users experience dynamic spectrum availabilities that vary over time and location. In the absence of any centralize infrastructure, users coordinate their spectrum usage to support fair access of spectrum and avoid interference. One critical challenge is to construct an efficient signalling path in the presen...

Spectrum Sharing In Dynamic Spectrum Access Networks

A study by Federal Communication Commission shows that most of the spectrum in current wireless networks is unused most of the time, while some spectrum is heavily used. Recently dynamic spectrum access (DSA) has been proposed to solve this spectrum inefficiency problem, by allowing users to opportunistically access to unused spectrum. One important question in DSA is how to efficiently share s...

Dynamic Spectrum Allocation and Sharing in Cognitive Cooperative Networks

Title of Dissertation: DYNAMIC SPECTRUM ALLOCATION AND SHARING IN COGNITIVE COOPERATIVE NETWORKS Beibei Wang, Doctor of Philosophy, 2009 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering The dramatic increase of service quality and channel capacity in wireless networks is severely limited by the scarcity of energy and bandwidth, which are the tw...

General distributed economic framework for dynamic spectrum allocation