7th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks

Research Article

Cognitive Networks Achieve Throughput Scaling of a Homogeneous Network

  • @INPROCEEDINGS{10.1109/WIOPT.2009.5291610,
        author={Sang-Woon Jeon and Natasha Devroye and Mai Vu and Sae-Young Chung and Vahid Tarokh},
        title={Cognitive Networks Achieve Throughput Scaling of a Homogeneous Network},
        proceedings={7th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks},
        publisher={IEEE},
        proceedings_a={WIOPT},
        year={2010},
        month={5},
        keywords={},
        doi={10.1109/WIOPT.2009.5291610}
    }
    
  • Sang-Woon Jeon
    Natasha Devroye
    Mai Vu
    Sae-Young Chung
    Vahid Tarokh
    Year: 2010
    Cognitive Networks Achieve Throughput Scaling of a Homogeneous Network
    WIOPT
    IEEE
    DOI: 10.1109/WIOPT.2009.5291610
Sang-Woon Jeon1,*, Natasha Devroye2,*, Mai Vu3,*, Sae-Young Chung1,*, Vahid Tarokh4,*
  • 1: School of EECS,KAIST,Daejeon, Korea
  • 2: School of ECE,University of Illinois at Chicago, Chicago, IL, USA
  • 3: Department of ECE, McGill University,Montreal, Canada
  • 4: School of EAS, Harvard University,Cambridge, MA, USA
*Contact email: swjeon@kaist.ac.kr, devroye@ece.uic.edu, mai.h.vu@mcgill.ca, sychung@ee.kaist.ac.kr, vahid@seas.harvard.edu

Abstract

We study two distinct, but overlapping, networks which operate at the same time, space and frequency. The first network consists of nrandomly distributed primary users, which form either an ad hoc network, or an infrastructuresupported ad hoc network in which ladditional base stations support the primary users. The second network consists of m randomly distributed secondary or cognitive users. The primary users have priority access to the spectrum and do not change their communication protocol in the presence of secondary users. The secondary users, however, need to adjust their protocol based on knowledge about the locations of the primary users so as not to harm the primary network’s scaling law. Base on percolation theory, we show that surprisingly, when the secondary network is denser than the primary network, both networks can simultaneously achieve the same throughput scaling law as a stand-alone ad hoc network.