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The Impact of Frequency-Agility on Dynamic Spectrum Sharing

Summary: The Impact of Frequency-Agility on Dynamic
Spectrum Sharing
Lili Cao, Lei Yang and Haitao Zheng
Department of Computer Science
University of California, Santa Barbara
{lilicao, leiyang, htzheng}@cs.ucsb.edu
Abstract-- Designed to adapt spectrum usage on-the-fly,
frequency-agile radios can drastically improve performance of
wireless networks. Such flexibility, however, comes with a cost of
increased hardware complexity. This motivates us to understand
when and why having higher degree of frequency-agility helps
and how much improvement it can lead to. In this paper, we
approach this question by comparing two types of agile radios in
the context of dynamic spectrum sharing in any given spectrum
chunk. We consider 1-agile radios that use a single frequency
channel but can adjust the channel's width and central frequency,
and k-agile radios that can combine up to k non-contiguously
aligned frequency segments into one transmission. We show that,
due to inherent demand dynamics and conflict heterogeneity,
networks using 1-agile radios often face the problem of spectrum


Source: Almeroth, Kevin C. - Department of Computer Science, University of California at Santa Barbara


Collections: Computer Technologies and Information Sciences