9th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

Implementation of an Opportunistic Spectrum Access Scheme with Disruption QoS

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2014.255337,
        author={Anirudha Sahoo and Michael Souryal and Mudumbai Ranganathan},
        title={Implementation of an Opportunistic Spectrum Access Scheme with Disruption QoS},
        proceedings={9th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2014},
        month={7},
        keywords={dsa opportunistic spectrum access qos},
        doi={10.4108/icst.crowncom.2014.255337}
    }
    
  • Anirudha Sahoo
    Michael Souryal
    Mudumbai Ranganathan
    Year: 2014
    Implementation of an Opportunistic Spectrum Access Scheme with Disruption QoS
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2014.255337
Anirudha Sahoo1,*, Michael Souryal1, Mudumbai Ranganathan1
  • 1: NIST
*Contact email: anirudha.sahoo@nist.gov

Abstract

Opportunistic Spectrum Access (OSA) is one of the models proposed for Dynamic Spectrum Access (DSA). In OSA systems, it is important to restrict the interference caused by Secondary Users (SUs) to the Primary Users (PUs). In [1], such an OSA scheme, based on residual idle time distribution of PU traffic, was proposed for a single channel system. In this paper, we suitably modify the above scheme for OFDM-based communication. We present a prototype implementation of the scheme on a GNU Radio based software defined radio (SDR) system using USRP hardware. To the best of our knowledge, this is the first prototype implementation of an OSA system which can bound the interference to PUs. We use two different Quality of Service (QoS) metrics to validate the scheme. We also show that a naive method of transmitting for a certain fraction of the mean residual idle time may lead to poor performance.