异构网络能耗优化技术研究

发布时间：2018-07-06 07:59

本文选题：异构蜂窝网络 + 齐次泊松点过程模型　；参考：《南京邮电大学》2017年硕士论文

【摘要】：移动互联网的飞速发展,丰富了人们生活的同时,也对蜂窝网络提出了更高的通信需求。为此,各种类型的蜂窝大量部署。然而基站数目的增加不可避免的会带来更大的能耗。考虑到经济环境等各方面因素,绿色通信的概念慢慢的为人们所接受,降低蜂窝网络的能耗成为通信研究的热点。本文正是在这样的背景下展开,主要从多点协作技术和基站休眠技术的角度针对异构蜂窝网络的能耗问题进行了研究。本文研究了一种以用户为中心的基站协作策略,位于协作半径内的基站协同地为目标用户服务。首先根据齐次泊松点过程模型对异构蜂窝网络进行建模,得出目标用户速率关于协作半径的表达式;协作集内能耗和目标用户速率均于协作半径相关,构建已知目标用户速率需求的协作集内能耗最低的最优化问题,并通过二分算法得出能耗最低时的最优协作半径。仿真结果表明,相比于同构蜂窝网络,本文研究的协作策略在异构蜂窝网络中有着更好的能耗性能表现。基站休眠技术通过有选择的关闭基站来降低蜂窝网络的能效。在上文的系统模型下,本文继续研究了一种小蜂窝随机休眠策略,参与协作的小蜂窝根据目标用户速率的需求按照合适的休眠比例休眠。首先得出目标用户速率关于休眠比例的关系表达式;然后构建已知目标用户速率需求的最优化问题,得出指定协作半径下,满足目标用户速率的最优基站休眠比例;为了分析协作集内最低的能耗,构建了能耗最小的最优化问题,并提出了一种联合优化协作半径和休眠比例的算法来解决该最优化问题;最后仿真分析了目标用户协作集内的最低能耗。
[Abstract]:The rapid development of mobile Internet enriches people's lives, but also puts forward higher communication requirements for cellular networks. For this purpose, various types of honeycomb are deployed in large numbers. However, the increase in the number of base stations will inevitably lead to greater energy consumption. Considering the economic environment and other factors, the concept of green communication is gradually accepted by people, reducing the energy consumption of cellular networks has become the focus of communication research. In this context, this paper mainly studies the energy consumption of heterogeneous cellular networks from the point of view of multi-point collaboration and base station dormancy technology. In this paper, a user-centric base station cooperation strategy is proposed, in which the base station in the radius of collaboration collaborates to serve the target user. Firstly, the heterogeneous cellular network is modeled according to the homogeneous Poisson point process model, and the expression of the target user rate on the collaboration radius is obtained. The energy consumption and the target user rate in the collaboration set are all related to the collaboration radius. The optimization problem of minimum energy consumption in the collaboration set with known target user rate requirements is constructed, and the optimal collaboration radius is obtained by dichotomous algorithm. The simulation results show that compared with isomorphic cellular networks, the cooperative strategy studied in this paper has better performance of energy consumption in heterogeneous cellular networks. Base station dormancy reduces the efficiency of cellular networks by selectively shutting down base stations. Under the above system model, we continue to study a random dormancy strategy for small honeycomb. The cooperative small cell sleeps according to the requirements of the target user rate according to the appropriate dormancy ratio. First, the relationship between the target user rate and the sleep rate is obtained, then the optimization problem of the known target user rate requirement is constructed, and the optimal base station sleep ratio satisfying the target user rate is obtained under the specified collaboration radius. In order to analyze the lowest energy consumption in the collaboration set, the optimization problem of minimum energy consumption is constructed, and a joint optimization algorithm of collaboration radius and sleep ratio is proposed to solve the optimization problem. Finally, the minimum energy consumption in the target user collaboration set is analyzed by simulation.
【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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