下一代Wi-Fi中同频干扰协调算法研究

发布时间：2018-12-19 18:06

【摘要】：本学位论文的研究课题来源于国家科技重大专项“超高速无线局域网的国际标准化与技术验证研究”(项目编号：2012ZX03004005-003),主要工作是对下一代Wi-Fi中同频干扰协调算法进行研究,重点研究基于全频复用的多小区信道分配(FFRMCA, Full Frequency Reuse Based Multi-cell Channel Allocation)算法,以及基于干扰代价信息的多小区功率分配(ICMPA,Interference Cost Based Multi-cell Power Allocation)算法,并进行仿真分析和性能估计。全文共分五章,主要包含以下内容：第一章说明课题的研究背景以及课题研究的目的和意义,并介绍本学位论文的主要内容和各章节安排。第二章重点阐述了IEEE 802.11标准、Wi-Fi网络的关键技术以及同频干扰技术。首先介绍IEEE 802.11系列协议和几种常见的IEEE 802.11标准；然后介绍Wi-Fi网络及其组网形式,重点介绍了下一代Wi-Fi的关键技术：最后详细讨论了同频干扰抑制技术和同频干扰协调技术,为课题的研究工作储备充分的知识。第三章对FFRMCA算法的设计和仿真进行了深入的阐述。首先介绍下一代Wi-Fi中基于OFDMA系统的特性,分析和总结了现有的多小区信道分配算法；然后提出了用于下一代Wi-Fi中的FFRMCA算法,该算法将信道分配问题抽象为两个优化问题,并用两个算法来求解；仿真结果表明,该算法能有效提高系统吞吐量和频谱利用率等系统性能。第四章讨论了ICMPA算法的设计和仿真问题。通过对现有的多小区功率分配算法的分析和总结,本文提出了用于下一代Wi-Fi中的ICMPA算法；在该算法中,每个小区将本小区受到的干扰转化为干扰代价信息并广播到网络中,再根据其他小区的干扰代价信息来量化干扰强度,该算法通过多次迭代,不断更新功率分配和干扰代价信息,从而更好地协调同频干扰；仿真结果表明,该算法可以有效地减少小区间同频干扰带来的影响,从而提高系统吞吐量。第五章总结全文的工作,对未来的工作方向进行了展望。
[Abstract]:The research topic of this dissertation comes from the national science and technology major project "International Standardization and Technical Verification Research of Ultra High Speed Wireless LAN" (item number: 2012ZX03004005-003). The main work is to study the co-frequency interference coordination algorithm in the next generation Wi-Fi, focusing on the multi-cell channel allocation (FFRMCA, Full Frequency Reuse Based Multi-cell Channel Allocation) algorithm based on full frequency multiplexing. And the multi-cell power allocation (ICMPA,Interference Cost Based Multi-cell Power Allocation) algorithm based on interference cost information is analyzed by simulation and performance estimation. The full text is divided into five chapters, mainly including the following contents: the first chapter explains the research background, the purpose and significance of the research, and introduces the main content of this thesis and the arrangement of each chapter. The second chapter focuses on the IEEE 802.11 standard, the key technology of Wi-Fi network and the same frequency interference technology. First, the IEEE 802.11 series protocols and several common IEEE 802.11 standards are introduced. Then the Wi-Fi network and its network form are introduced, and the key technologies of the next generation Wi-Fi are emphatically introduced. Finally, the co-frequency interference suppression technology and the co-frequency interference coordination technology are discussed in detail, which provides sufficient knowledge for the research work of the project. The third chapter describes the design and simulation of FFRMCA algorithm. Firstly, the characteristics of the next generation Wi-Fi based on OFDMA system are introduced, and the existing multi-cell channel allocation algorithms are analyzed and summarized. Then a FFRMCA algorithm for next generation Wi-Fi is proposed. The algorithm abstracts the channel assignment problem into two optimization problems and solves them by two algorithms. Simulation results show that the proposed algorithm can effectively improve the system throughput and spectral efficiency. Chapter 4 discusses the design and simulation of ICMPA algorithm. Based on the analysis and summary of the existing multi-cell power allocation algorithms, this paper proposes a ICMPA algorithm for the next generation Wi-Fi. In this algorithm, each cell transforms the interference from the cell into interference cost information and broadcasts it to the network, then quantifies the interference intensity according to the interference cost information of other cells. Power allocation and interference cost information are constantly updated to better coordinate the co-frequency interference; The simulation results show that the proposed algorithm can effectively reduce the influence of inter-cell co-frequency interference and improve the system throughput. The fifth chapter summarizes the work of the full text, and prospects the future work direction.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN92

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