On Centralized and Distributed Frequency Assignment in Frequency Hopping (Cognitive Radio) Cellular Networks

Abstract

Frequency Assignment is an important approach to mitigate multicell interference in cellular systems. In this paper, we consider the frequency assignement in such systems with frequency hopping. In particular we focus our attention on cognitive radio cellular systems as one of the very promising future access technologies, taking IEEE 802.22 as an example, which is currently under standardization. While the optimal frequency assignment for such a system is conceptually straightforward – as well as computationally complex – we demonstrate that usage of distributed methods leads to high loss of assignment efficiency. In addition w