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Sensing error aware delay-optimal channel allocation scheme for cognitive radio networks

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Abstract

Spectrum sensing is not always perfect in practical cognitive radio networks. In this paper, two kinds of sensing errors are considered into the channel allocation scheme. Our work focuses on the cases that the channel availability varies fast during a channel allocation period, in which case the channel dynamics needs to be considered. The sensing errors are modeled to derive the metric of mean delay for each user-channel combination using the vacation queueing model. Further, the optimal resource allocation is determined based on the mean delay metric by bipartite graph matching. The simulation results indicate that the proposed mean delay metric can represent the transmission performance successfully, and the proposed resource allocation scheme is robust to sensing errors.

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Authors and Affiliations

  1. Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, Hangzhou, 310027, P.R. China

    Wei Wang, Kejian Wu, Haiyan Luo, Guanding Yu & Zhaoyang Zhang

  2. Key Laboratory of Information Coding and Transmission, Southwest Jiaotong University, Chengdu, 610031, P.R. China

    Wei Wang

Authors
  1. Wei Wang
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  2. Kejian Wu
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  3. Haiyan Luo
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  4. Guanding Yu
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  5. Zhaoyang Zhang
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Corresponding author

Correspondence to Wei Wang.

Additional information

Part of this work has been presented in IEEE VTC2010-Spring. This work is supported by National 973 Program under grant No. 2009CB320405, and National Natural Science Foundation of China under grant No. 61001098, 60972057, 60972058 and 60802012, Fundamental Research Funds for the Central Universities under grant No. 2010QNA5011, Scientific Research Fund of Zhejiang Provincial Education Department under grant No. Y200909796, and the open research fund of Key Laboratory of Information Coding and Transmission, Southwest Jiaotong University.

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Wang, W., Wu, K., Luo, H. et al. Sensing error aware delay-optimal channel allocation scheme for cognitive radio networks. Telecommun Syst 52, 1895–1904 (2013). https://doi.org/10.1007/s11235-011-9472-x

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  • DOI: https://doi.org/10.1007/s11235-011-9472-x

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