本文選題：異構(gòu)蜂窩網(wǎng)絡(luò) + 齊次泊松點過程模型　； 參考：《南京郵電大學》2017年碩士論文

【摘要】：移動互聯(lián)網(wǎng)的飛速發(fā)展,豐富了人們生活的同時,也對蜂窩網(wǎng)絡(luò)提出了更高的通信需求。為此,各種類型的蜂窩大量部署。然而基站數(shù)目的增加不可避免的會帶來更大的能耗�？紤]到經(jīng)濟環(huán)境等各方面因素,綠色通信的概念慢慢的為人們所接受,降低蜂窩網(wǎng)絡(luò)的能耗成為通信研究的熱點。本文正是在這樣的背景下展開,主要從多點協(xié)作技術(shù)和基站休眠技術(shù)的角度針對異構(gòu)蜂窩網(wǎng)絡(luò)的能耗問題進行了研究。本文研究了一種以用戶為中心的基站協(xié)作策略,位于協(xié)作半徑內(nèi)的基站協(xié)同地為目標用戶服務(wù)。首先根據(jù)齊次泊松點過程模型對異構(gòu)蜂窩網(wǎng)絡(luò)進行建模,得出目標用戶速率關(guān)于協(xié)作半徑的表達式;協(xié)作集內(nèi)能耗和目標用戶速率均于協(xié)作半徑相關(guān),構(gòu)建已知目標用戶速率需求的協(xié)作集內(nèi)能耗最低的最優(yōu)化問題,并通過二分算法得出能耗最低時的最優(yōu)協(xié)作半徑。仿真結(jié)果表明,相比于同構(gòu)蜂窩網(wǎng)絡(luò),本文研究的協(xié)作策略在異構(gòu)蜂窩網(wǎng)絡(luò)中有著更好的能耗性能表現(xiàn)�；拘菝呒夹g(shù)通過有選擇的關(guān)閉基站來降低蜂窩網(wǎng)絡(luò)的能效。在上文的系統(tǒng)模型下,本文繼續(xù)研究了一種小蜂窩隨機休眠策略,參與協(xié)作的小蜂窩根據(jù)目標用戶速率的需求按照合適的休眠比例休眠。首先得出目標用戶速率關(guān)于休眠比例的關(guān)系表達式;然后構(gòu)建已知目標用戶速率需求的最優(yōu)化問題,得出指定協(xié)作半徑下,滿足目標用戶速率的最優(yōu)基站休眠比例;為了分析協(xié)作集內(nèi)最低的能耗,構(gòu)建了能耗最小的最優(yōu)化問題,并提出了一種聯(lián)合優(yōu)化協(xié)作半徑和休眠比例的算法來解決該最優(yōu)化問題;最后仿真分析了目標用戶協(xié)作集內(nèi)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.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5

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本文編號：2102069