| 基于联盟的认知无线电机会频谱接入 |
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| 引用本文： | 张兆城,杨震.基于联盟的认知无线电机会频谱接入[J].南京邮电大学学报(自然科学版),2010,30(2). |
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| 作者姓名： | 张兆城 杨震 |
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| 作者单位： | 南京邮电大学,信号处理与传输研究院,江苏,南京,210003 |
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| 基金项目： | 国家高技术研究发展计划(863计划)(06KJA51001);;江苏省高校自然科学重大基础研究项目(2009AA01Z241)资助项目 |
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| 摘 要： | 在认知无线电中,由于次用户会因为错误感知未能发现主用户而接入信道,从而造成主次用户的冲突碰撞,而且竞争同一信道的次用户越多,冲突碰撞的概率越大。提出了基于联盟的MAC协议(ALLY-MAC),合理分配竞争各信道的次用户数量,从而减少与主用户发生冲突碰撞的可能性,提高网络吞吐量。通过仿真实验可看出,与OSA-MAC的接入机制相比较,所提方案能有效地减少主次用户之间的冲突碰撞率,提高网络吞吐量。
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| 关 键 词： | 认知无线电 机会频谱接入 联盟 信道分配 |
Alliance-based Opportunistic Spectrum Access for Cognitive Radio Networks |
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| ZHANG Zhao-cheng,YANG Zhen.Alliance-based Opportunistic Spectrum Access for Cognitive Radio Networks[J].Journal of Nanjing University of Posts and Telecommunications,2010,30(2). |
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| Authors: | ZHANG Zhao-cheng YANG Zhen |
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| Institution: | Institute of Signal Processing and Transmission/a>;Nanjing University of Posts and Telecommunications/a>;Nanjing 210003/a>;China |
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| Abstract: | In cognitive radio networks,collision occurs when the secondary user fails to detect the presence of primary users and may access the channel.The more is the number of the secondary users in contention of the same channel,the higher is the collision probability.An alliance-based access method is proposed to rationally allocate the number of secondary users in contention of each channelso as to reduce the conflicts between primary users and secondary users.The mechanisms of OSA-MAC and ALLY-MAC were compared... |
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| Keywords: | cognitive radio opportunistic spectrum access alliance channel allocation |
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