7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

Spectrum Availability Recheck Scheme (SARS) for Cognitive Radio Systems with Mobility

Download646 downloads
  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.248116,
        author={Woongsup Lee and Dong-Ho Cho},
        title={Spectrum Availability Recheck Scheme (SARS) for Cognitive Radio Systems with Mobility},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={cognitive radio spectrum sensing user mobility spectrum availability check geolocation database},
        doi={10.4108/icst.crowncom.2012.248116}
    }
    
  • Woongsup Lee
    Dong-Ho Cho
    Year: 2012
    Spectrum Availability Recheck Scheme (SARS) for Cognitive Radio Systems with Mobility
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.248116
Woongsup Lee1,*, Dong-Ho Cho1
  • 1: KAIST
*Contact email: wslee@comis.kaist.ac.kr

Abstract

We consider the change of spectrum availability which is caused by the mobility of a cognitive radio (CR) user. Given that the CR user should not interfere with a primary user (PU), it should periodically check the availability of the CR band which is being used. Herein, we refer the scheme to check the availability of spectrum as SARS (Spectrum Availability Recheck Scheme). We propose a SARS for both CR systems which use a geo-location database to find vacant band and CR systems which use spectrum sensing to find vacant band. The proposed SARS adaptively changes its operation according to the velocity of a CR user. Through the analysis and the simulation results, we have shown that the spectrum availability of a CR user can be efficiently verified by using proposed SARS, when the CR user moves. We also have shown that the overheads caused by our SARS is low.