6th International ICST Conference on Communications and Networking in China

Research Article

Performance analysis for searching delay of secondary users in Cognitive Radios

  • @INPROCEEDINGS{10.1109/ChinaCom.2011.6158153,
        author={Sheng Wang and Ye Wang and Qinyu Zhang and Yu Fu},
        title={Performance analysis for searching delay of secondary users in Cognitive Radios},
        proceedings={6th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2012},
        month={3},
        keywords={cognitive radio networks searching delay ctmc blocking and dropping probability},
        doi={10.1109/ChinaCom.2011.6158153}
    }
    
  • Sheng Wang
    Ye Wang
    Qinyu Zhang
    Yu Fu
    Year: 2012
    Performance analysis for searching delay of secondary users in Cognitive Radios
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2011.6158153
Sheng Wang1, Ye Wang1, Qinyu Zhang1,*, Yu Fu1
  • 1: Harbin Institute of Technology Shenzhen Graduate School, Department of Electronic and Information Engineering
*Contact email: zqy@hit.edu.cn

Abstract

Spectrum hand-off is an efficient way to utilize spectrum resources in Cognitive Radio. However, a lot of researches have been done without consideration of searching delay. In this paper, secondary users’ searching delay, which cannot be ignored in actual situation, is considered with an improved three-dimension Markov approach for dynamic spectrum access. Theoretically, we use quasi-birth-and-death processes (QBDs) to describe Continuous-Time Markov chains (CTMC) for spectrum access process. Then through the analysis of the blocking probability, the dropping probability and the user capacity, we present how the secondary users’ searching delay affects the performance of the system.