异构小蜂窝网络分布式能量分配技术研究

发布时间：2018-08-21 15:00

【摘要】：随着国内外移动用户和移动宽带用户数的飞速增长,现有的网络已无法充分满足用户日益增长的需求。异构网络(Heterogeneous Network,HetNet)通过在现有的宏蜂窝网络中插入更小的、可自我配置的小基站,提供了实用的、扩展性强的,且效益高的方式来显著地提高现有无线网络的容量。异构网的存在使得无线环境也变得越来越复杂,给其无线资源管理带来很大的难度。同时,大量基站的存在也带来了大量的能耗。因此,如何合理地分配无线网络资源,以更低的能耗提供更高速率成为异构蜂窝网络中的一个重要研究方向。本文提出了基于非合作博弈的异构蜂窝网络分布式功率控制方案。所提方案在满足小蜂窝发送功率和信息传输速率的限制条件下,最大程度地提高小蜂窝到用户下行链路能源利用效率,从而达到以更低的能耗提供更高速率的目的。本文在第一章中,主要介绍了本次课题研究的背景和意义,同时简单分析了国内外研究现状。本文在第二章中,介绍了博弈论的基础知识,和博弈论在无线通信中的应用。本文在第三章研究了基于非合作博弈的小蜂窝网络的分布式功率控制方案。在只考虑同层干扰的情况下,微蜂窝以非合作博弈的方式竞争该资源,并证明了纳什均衡的存在性和唯一性,提出了一种迭代式的资源分配算法,通过不断迭代小蜂窝的发送功率来优化系统能效。仿真结果表明了该系统模型纳什均衡点的存在性并且说明了该算法收敛于纳什均衡点。本文在第四章研究了在宏蜂窝和微蜂窝并存的异构无线网络中,考虑宏蜂窝和微蜂窝共同以非合作博弈的方式竞争资源,为了提高系统能效,提出了一种分布式功率分配方案。所提方案在满足小蜂窝发送功率和信息传输速率的限制条件下,最大程度地提高小蜂窝到用户下行链路能源利用效率,从而达到以更低的能耗提供更高速率的目的。
[Abstract]:With the rapid growth of the number of mobile users and mobile broadband users at home and abroad, the existing network can no longer fully meet the increasing needs of users. By inserting smaller, self-configurable base stations into existing macrocellular networks, Heterogeneous Network (HetNet) provides a practical, scalable, and cost-effective way to significantly increase the capacity of existing wireless networks. The existence of heterogeneous networks makes the wireless environment more and more complex, which brings great difficulty to its wireless resource management. At the same time, the existence of a large number of base stations also brought a lot of energy consumption. Therefore, how to reasonably allocate wireless network resources and provide higher rates with lower energy consumption has become an important research direction in heterogeneous cellular networks. This paper presents a distributed power control scheme for heterogeneous cellular networks based on non-cooperative games. The proposed scheme can maximize the energy efficiency of the downlink between the small cell and the user under the condition of satisfying the limitation of the transmission power and the rate of information transmission of the small cell, thus achieving the purpose of providing a higher rate with lower energy consumption. In the first chapter, the background and significance of this research are introduced, and the current research situation at home and abroad is briefly analyzed. In the second chapter, the basic knowledge of game theory and the application of game theory in wireless communication are introduced. In chapter 3, the distributed power control scheme for small cellular networks based on non-cooperative game is studied. Under the condition of considering only the same layer interference, the microcellular competes for the resource by non-cooperative game, and proves the existence and uniqueness of Nash equilibrium, and proposes an iterative resource allocation algorithm. The system energy efficiency is optimized by iterating over the transmission power of a small cell. Simulation results show the existence of Nash equilibrium points in the system model and show that the algorithm converges to Nash equilibrium points. In chapter 4, in order to improve system energy efficiency, we propose a distributed power allocation scheme in heterogeneous wireless networks where macro cell and micro cell exist side by side, considering that macro cell and micro cell compete for resources in a non-cooperative game. The proposed scheme can maximize the energy efficiency of the downlink between the small cell and the user under the condition of satisfying the limitation of the transmission power and the rate of information transmission of the small cell, thus achieving the purpose of providing a higher rate with lower energy consumption.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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