Bounds on Secondary User Connectivity in Cognitive Radio Networks

Bounds on Secondary User Connectivity in Cognitive Radio Networks
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认知无线电网络中二次用户连接的界限

DOI:
10.1109/lcomm.2015.2404436
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发表时间:
2015-02
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
Liu Fuqiang
Liu Fuqiang
中科院分区:
其他
文献类型:
--
作者:
Liu Dong;Liu Erwu;Ren Yi;Zhang Zhengqing;Wang Rui;Liu Fuqiang

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我们考虑一个大规模的认知无线电网络(CRN)在瑞利衰落环境。信中考虑了次级用户(SU)的频谱感知误差。累积网络间干扰(主网络和辅助网络之间)的计算和主用户(PU)的中断概率推导出的封闭形式。得到了渗透区域的上界和下界,并进行了分析,在该上界和下界内,次级网络在PU的中断概率保持在可容忍的阈值以下的情况下进行扩展。边界取决于SU的正确检测和虚警概率,以及PU的发射功率和保护半径。进一步我们发现,渗透SU并同时为PU提供保护的渗透区域并不总是存在。
We consider a large-scale cognitive radio network (CRN) in a Rayleigh fading environment. Errors of spectrum sensing by secondary users (SUs) are considered in the letter. Cumulative inter-network interference (between primary and secondary networks) is calculated and outage probability of primary users (PUs) is derived in the closed-form. The upper and lower bounds on the percolation area are obtained and analyzed, within which the secondary network percolates while the PU's outage probability is kept below a tolerable threshold. The bounds depend on SU's correct detection and false alarm probabilities, and PU's transmit power and protection radius. Further we find that the percolation area that percolates SUs and meanwhile provides protection for PUs does not always exist.
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