5th International ICST Conference on Communications and Networking in China

Research Article

Cooperative sensor solution to enhancing the performance of spectrum sensing

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  • @INPROCEEDINGS{10.4108/chinacom.2010.42,
        author={Hongcheng Zhuang and Zezhou Luo and Jietao Zhang and Yun Li},
        title={Cooperative sensor solution to enhancing the performance of spectrum sensing},
        proceedings={5th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2011},
        month={1},
        keywords={Cognitive radio Cooperative spectrum sensing Cooperative communication Wireless sensor Spectrum information database},
        doi={10.4108/chinacom.2010.42}
    }
    
  • Hongcheng Zhuang
    Zezhou Luo
    Jietao Zhang
    Yun Li
    Year: 2011
    Cooperative sensor solution to enhancing the performance of spectrum sensing
    CHINACOM
    ICST
    DOI: 10.4108/chinacom.2010.42
Hongcheng Zhuang1,*, Zezhou Luo1,*, Jietao Zhang1,*, Yun Li2,*
  • 1: Communication Technology Lab, Huawei Technologies Co., Ltd., Shenzhen, China
  • 2: Special Research Centre for Optical Internet and Wireless, Chongqing University of Post and Telecommunications, Chongqing, China
*Contact email: zhc@huawei.com, luozezhou@huawei.com, jtzhang@huawei.com, liyun@cqupt.edu.cn

Abstract

Cognitive radio (CR) is a promising technology for future wireless networks. In order to reduce the interference to primary system, CR users have to detect the spectra with low overhead and reliably in sensing slots, which has to occupy part of the available resources. In this paper, we propose a novel spectrum sensing solution that is based on cooperative wireless sensors to detect and collect available channels information and then establish a regional database managing regional spectrum information. We classify wireless sensors into relay wireless sensors (RWSs) and ordinary wireless sensors (OWSs), considering the diversity of multi-sensors and Cooperative Amplify-and-Forward (CAF) spectrum detection and CRC-based Decode-and-Forward (CDF) cooperative result reporting. Soften hard combination mechanism is proposed to further enhance the performance of spectrum sensing with one-bit overhead. If observed signals in OWSs fall in uncertain energy region, OWSs relay the signals to RWSs by CAF, otherwise, OWSs report the detection results to RWSs and then RWSs relay to Cognitive Radio Bastion (CR-BS) by CDF. Simulations show that spectrum sensing performance is improved by means of the two-layer sensing mechanism.