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arXiv 1601.05069cs.NIcs.ITmath.ITmath.OC
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认知无线电网络中动态频谱共享的媒体接入控制

Medium Access Control for Dynamic Spectrum Sharing in Cognitive Radio Networks

Le Thanh Tan

摘要:

在过去十年中,无线服务和应用的激增导致了对无线频谱的快速增长的需求。因此,我们一直面对严重的频谱短缺问题,尽管多项测量结果显示,大部分持牌无线电频谱的使用率极低。这些事实促使了动态频谱接入(DSA)和认知无线电技术的发展,以提高频谱利用的效率和灵活性。在这篇论文中,我们研究的设计,分析和优化问题的联合频谱感知和认知媒体接入控制(CMAC)协议工程的认知无线电网络(CRN)。联合频谱感知和CMAC的设计被认为是在交织频谱共享范式和不同的通信设置。我们的研究成果主要有四个方面,即并行频谱感知的CMAC协议设计、顺序感知的CMAC协议设计、协作感知的CMAC协议设计和异步全双工认知MAC协议设计。我们开发了各种分析模型,我们提出的CMAC协议设计的吞吐量性能分析。基于这些分析模型,我们开发了不同的有效算法来配置CMAC协议,包括信道分配,感知时间,发送功率,竞争窗口,以最大化次级网络的总吞吐量。此外,广泛的数值结果,以获得进一步的见解,并评估我们的CMAC协议设计的性能。数值和仿真结果证实,我们提出的CMAC协议可以实现有效的频谱利用率和显着的性能增益相比,现有的和未优化的设计。

英文摘要:

The proliferation of wireless services and applications over the past decade has led to the rapidly increasing demand in wireless spectrum. Hence, we have been facing a critical spectrum shortage problem even though several measurements have indicated that most licensed radio spectrum is very underutilized. These facts have motivated the development of dynamic spectrum access (DSA) and cognitive radio techniques to enhance the efficiency and flexibility of spectrum utilization. In this dissertation, we investigate design, analysis, and optimization issues for joint spectrum sensing and cognitive medium access control (CMAC) protocol engineering for cognitive radio networks (CRNs). The joint spectrum sensing and CMAC design is considered under the interweave spectrum sharing paradigm and different communications settings. Our research has resulted in four major research contributions, namely, the CMAC protocol design with parallel spectrum sensing, the CMAC protocol with sequential sensing, the CMAC protocol with cooperative sensing and the asynchronous Full-Duplex cognitive MAC. We develop various analytical models for throughput performance analysis of our proposed CMAC protocol designs. Based on these analytical models, we develop different efficient algorithms to configure the CMAC protocol including channel allocation, sensing time, transmit power, contention window to maximize the total throughput of the secondary network. Furthermore, extensive numerical results are presented to gain further insights and to evaluate the performance of our CMAC protocol designs. Both the numerical and simulation results confirm that our proposed CMAC protocols can achieve efficient spectrum utilization and significant performance gains compared to existing and unoptimized designs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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