6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

The Capacity of Cognitive Ad-Hoc Networks with Carrier Sensing Errors

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2011.245917,
        author={Seungmo  Kim and Tahjoon  Park and Wan  Choi and Youngnam  Han},
        title={The Capacity of Cognitive Ad-Hoc Networks with Carrier Sensing Errors},
        proceedings={6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={5},
        keywords={Ad-hoc sensing errors capacity},
        doi={10.4108/icst.crowncom.2011.245917}
    }
    
  • Seungmo Kim
    Tahjoon Park
    Wan Choi
    Youngnam Han
    Year: 2012
    The Capacity of Cognitive Ad-Hoc Networks with Carrier Sensing Errors
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2011.245917
Seungmo Kim1,*, Tahjoon Park1, Wan Choi2,*, Youngnam Han2,*
  • 1: Samsung Electro-Mechanics, Korea
  • 2: Dept. of EE, KAIST, Daejeon, Korea
*Contact email: seungmo0604.kim@samsung.com, wchoi@ee.kaist.ac.kr, ynhan@ee.kaist.ac.kr

Abstract

We analyze the capacity of cognitive ad-hoc networks under the effects of sensing errors: false alarm and missed detection. We present an ad-hoc network model overlaid on a primary system from which a cognitive node exploits spectrum holes for retransmissions. We derive per-link capacity, the indicator of the network’s capacity, by considering statistics of the primary users’ (PUs) channel occupancy and sensing errors. Our analysis shows that the capacity scaling law is kept unchanged, 𝑂(1/ √ log 𝑛) by the number of nodes 𝑛, even after sensing errors are introduced. It also shows how the capacity depends on the PUs’ channel occupancy and sensing errors.