4th International ICST Conference on Wireless Internet

Research Article

Traffic-Aware Dynamic Spectrum Access

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  • @INPROCEEDINGS{10.4108/ICST.WICON2008.4953,
        author={Lei Yang and Lili Cao and Heather Zheng and Elizabeth Belding},
        title={Traffic-Aware Dynamic Spectrum Access},
        proceedings={4th International ICST Conference on Wireless Internet},
  • Lei Yang
    Lili Cao
    Heather Zheng
    Elizabeth Belding
    Year: 2010
    Traffic-Aware Dynamic Spectrum Access
    DOI: 10.4108/ICST.WICON2008.4953
Lei Yang1,*, Lili Cao1,*, Heather Zheng1,*, Elizabeth Belding1,*
  • 1: Department of Computer Science, University of California, Santa Barbara, CA 93106
*Contact email: leiyang@cs.ucsb.edu, lilicao@cs.ucsb.edu, htzheng@cs.ucsb.edu, ebelding@cs.ucsb.edu


Demand-driven spectrum allocation can drastically improve performance for WiFi access points struggling under increasing user demands. While their frequency agility makes cognitive radios ideal for this challenge, performing adaptive spectrum allocation is a complex and difficult process. In this work, we propose FLEX, an efficient spectrum allocation architecture that efficiently adapts to dynamic traffic demands. FLEX tunes network-wide spectrum allocation by access points coordinating with peers, minimizing network resets through local adaptations. Through detailed analysis and experimental evaluation, we show that FLEX converges quickly, provides users with proportional-fair spectrum usage and significantly outperforms existing spectrum allocation proposals.