本文選題：異構(gòu)蜂窩網(wǎng)絡(luò) + 上下行解耦接入架構(gòu)�。� 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)、物聯(lián)網(wǎng)產(chǎn)業(yè)的迅猛發(fā)展,移動通信系統(tǒng)的數(shù)據(jù)業(yè)務(wù)需求呈現(xiàn)出爆炸式的增長。為了在有限的頻譜資源下實(shí)現(xiàn)網(wǎng)絡(luò)容量的擴(kuò)充,異構(gòu)蜂窩網(wǎng)絡(luò)應(yīng)運(yùn)而生。異構(gòu)蜂窩網(wǎng)絡(luò)在傳統(tǒng)單層宏蜂窩的基礎(chǔ)上,通過在熱點(diǎn)及盲點(diǎn)區(qū)域疊加其他類型的低功率、低成本設(shè)備,實(shí)現(xiàn)多類型網(wǎng)絡(luò)基礎(chǔ)設(shè)施的綜合服務(wù)。盡管低功率小基站的引入降低了單個(gè)基站的平均能耗,隨著基站數(shù)量的不斷增加,網(wǎng)絡(luò)的整體能耗開銷日益增大。尤其在網(wǎng)絡(luò)密集化不斷加劇的第五代移動通信系統(tǒng)(5G)中,高能效的異構(gòu)蜂窩網(wǎng)絡(luò)研究已經(jīng)成為工業(yè)界和學(xué)術(shù)界關(guān)注的熱點(diǎn)。本文主要從異構(gòu)蜂窩網(wǎng)絡(luò)的接入架構(gòu)出發(fā),理論分析并設(shè)計(jì)一種新型的高能效異構(gòu)蜂窩網(wǎng)絡(luò)接入架構(gòu),上下行解耦接入架構(gòu)。傳統(tǒng)蜂窩網(wǎng)絡(luò)用戶的上行和下行通信接入相同的基站,通常為地理位置最近,也就是接收信號最強(qiáng)的基站,這種上下行耦合的接入方式在異構(gòu)蜂窩網(wǎng)絡(luò)中并不適用。一方面,異構(gòu)蜂窩網(wǎng)絡(luò)中不同類型基站的發(fā)射功率差異較大,地理位置最近的基站未必會提供最強(qiáng)的下行接收信號;另一方面,電池供電的終端用戶更傾向上行接入地理位置最近的基站來節(jié)約能耗�；谏闲泻拖滦胁煌P(guān)聯(lián)基站的需求,上下行解耦接入架構(gòu)受到越來越多的關(guān)注。本文在已有研究基礎(chǔ)上,對該架構(gòu)的應(yīng)用場景、面臨的挑戰(zhàn)、存在的研究難點(diǎn)及解決方案等進(jìn)行了細(xì)致分析,應(yīng)用隨機(jī)幾何理論和排隊(duì)論理論研究該架構(gòu)所面臨的關(guān)鍵問題,包括上下行解耦接入架構(gòu)帶來的網(wǎng)絡(luò)性能增益,該架構(gòu)的普適性分析,該架構(gòu)下高能效異構(gòu)蜂窩網(wǎng)絡(luò)設(shè)計(jì)及部署等。本文的主要研究成果如下:1)理論分析了上下行解耦接入架構(gòu)為異構(gòu)蜂窩網(wǎng)絡(luò)帶來的性能增益。上下行解耦接入架構(gòu)與傳統(tǒng)接入架構(gòu)相比,直觀上可以提高上行傳輸?shù)男阅?但同時(shí)面臨著信號處理方面的額外開銷,包括信令同步認(rèn)證、信號轉(zhuǎn)交等。本文應(yīng)用隨機(jī)幾何理論,對上下行解耦接入架構(gòu)進(jìn)行網(wǎng)絡(luò)建模,從理論上定量分析該架構(gòu)與傳統(tǒng)接入架構(gòu)相比帶來的網(wǎng)絡(luò)性能增益。研究表明,上下行解耦接入架構(gòu)為異構(gòu)蜂窩網(wǎng)絡(luò)帶來了基站的負(fù)載均衡、系統(tǒng)頻效和能效的提升以及公平的用戶服務(wù)特性等性能增益,為該架構(gòu)的工程實(shí)際應(yīng)用奠定了理論基礎(chǔ)。2)上下行解耦接入架構(gòu)適用于多類型的網(wǎng)絡(luò)場景。本文分析了異構(gòu)蜂窩網(wǎng)絡(luò)中的兩種典型用戶分布場景,包括用戶隨機(jī)均勻分布以及熱點(diǎn)地區(qū)用戶成簇分布,分別采用了泊松點(diǎn)過程和泊松簇過程進(jìn)行建模。研究表明上下行解耦接入架構(gòu)可以在兩種用戶接入場景中提供網(wǎng)絡(luò)性能增益。盡管用戶成簇分布模型加大了理論分析的難度,該研究一定程度上為上下行解耦接入架構(gòu)應(yīng)用場景的普適性提供了理論支持。3)理論分析并設(shè)計(jì)了上下行解耦接入架構(gòu)的高能效休眠機(jī)制。盡管上下行解耦接入架構(gòu)可以為異構(gòu)蜂窩網(wǎng)絡(luò)帶來為一定程度上的能效提升,傳統(tǒng)高能效休眠機(jī)制在這一新型接入架構(gòu)上將進(jìn)一步提高系統(tǒng)能效。本文采用隨機(jī)幾何理論對二層異構(gòu)蜂窩網(wǎng)絡(luò)的休眠模式進(jìn)行建模。研究表明,已有上下行非解耦接入架構(gòu)中采用的休眠機(jī)制在新型架構(gòu)中的直接應(yīng)用,將過度關(guān)閉基站,降低用戶服務(wù)質(zhì)量,造成網(wǎng)絡(luò)實(shí)際能效的降低。根據(jù)上下行解耦接入架構(gòu)的特性,我們設(shè)計(jì)了新型休眠機(jī)制,有效節(jié)能的同時(shí)保障了網(wǎng)絡(luò)服務(wù)。4)設(shè)計(jì)基于動態(tài)用戶行為的上下行解耦接入架構(gòu)的高能效休眠機(jī)制�？紤]用戶業(yè)務(wù)的動態(tài)特性,根據(jù)排隊(duì)論理論,從節(jié)約系統(tǒng)能耗和降低服務(wù)時(shí)延兩個(gè)角度,折中分析并設(shè)計(jì)休眠機(jī)制,給出了連續(xù)休眠時(shí)長,即休眠窗口的理論上界和下界。同時(shí)分析了上行和下行業(yè)務(wù)量對休眠窗口大小的影響,為實(shí)踐中根據(jù)業(yè)務(wù)量設(shè)計(jì)合適的上下行解耦接入架構(gòu)休眠策略提供了理論指導(dǎo)。
[Abstract]:With the rapid development of the Internet and the Internet of things industry, the demand for data services in mobile communication systems is increasing. In order to expand the network capacity under the limited spectrum resources, heterogeneous cellular networks emerge as the times require. Other types of low power, low cost devices implement integrated services for multi type network infrastructure. Although the introduction of low power and small base stations reduces the average energy consumption of a single base station, with the increasing number of base stations, the overall energy consumption of the network is increasing. Especially in the fifth generation mobile communication system, which is intensifying in the network denseness. In 5G, high-energy heterogeneous cellular networks have become the focus of industry and academia. Based on the access architecture of heterogeneous cellular networks, this paper analyzes and designs a new type of high-energy heterogeneous cellular network access architecture, uplink and downlink decoupling architecture. The uplink and downlink of traditional cellular network users Communication access to the same base station, usually the nearest geographic location, is the strongest base station receiving the signal, which is not applicable in heterogeneous cellular networks. On the one hand, the transmission power of different types of base stations in heterogeneous cellular networks is much different, and the nearest base station in geographic location may not provide the strongest bottom On the other hand, the battery powered terminal users are more inclined to access the nearest geo location base station to save energy. Based on the requirements of the uplink and downlink base stations, the up-downlink decoupling access architecture is being paid more and more attention. This paper is facing the challenge of the application scenario of the architecture on the basis of the existing research. A detailed analysis of the existing research difficulties and solutions is carried out. The key problems faced by the stochastic geometry theory and queuing theory are studied, including the network performance gain, the universality analysis of the architecture, the design and deployment of the high energy efficiency heterogeneous cellular network, and so on. The main research results are as follows: 1) the performance gain of the upstream and downlink decoupling access architecture for heterogeneous cellular networks is analyzed theoretically. The upstream and downlink decoupling access architecture can improve the performance of the uplink transmission directly compared with the traditional access architecture, but at the same time, it faces the additional overhead of signal processing, including signaling synchronization authentication, signal transfer. In this paper, we use random geometry theory to model the up-downlink decoupling access architecture, and quantitatively analyze the network performance gain of the architecture compared with the traditional access architecture. The research shows that the up-downlink decoupling access architecture brings the load balance of the base station, the system frequency efficiency and the energy efficiency of the heterogeneous cellular network. And the performance gain of fair user service characteristics, which lays a theoretical foundation for the practical application of the architecture.2), the downlink decoupling access architecture is suitable for multiple types of network scenes. This paper analyzes two typical user distribution scenes in heterogeneous cellular networks, including the uniform distribution of users and the clustering of users in hot areas. The research shows that the upstream and downlink decoupling access architecture can provide network performance gain in two user access scenarios. Although the user cluster distribution model increases the difficulty of theoretical analysis, it is a certain extent for the application scenario of the upstream and downlink decoupling access architecture. The adaptability provides theoretical support for.3) theoretical analysis and the design of high energy efficiency dormancy mechanism for the upstream and downlink decoupling access architecture. Although the upstream and downlink decoupling access architecture can bring a certain degree of energy efficiency for heterogeneous cellular networks, the traditional high efficiency dormancy mechanism will further improve the system energy efficiency in this new type of access architecture. This paper uses random geometry theory to model the dormancy mode of two layer heterogeneous cellular networks. The study shows that the direct application of dormancy mechanism used in the upstream and downlink non decoupling access architecture will close the base station, reduce the user's service quality and reduce the actual energy efficiency of the network. The characteristics of the architecture, we designed a new dormancy mechanism, effectively saving energy and guaranteeing the network service.4) to design the high energy efficiency dormancy mechanism based on the up-downlink decoupling access architecture based on dynamic user behavior. Considering the dynamic characteristics of the user service, according to the queuing theory, it is reduced from two angles of saving the energy consumption of the system and reducing the service delay. The mechanism of dormancy is analyzed and designed, and the theoretical upper and lower bounds of the dormancy window are given. The influence of the upstream and downlink traffic on the size of the dormancy window is analyzed, which provides a theoretical guidance for the design of a proper downlink decoupling architecture in practice.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 尤肖虎;潘志文;高西奇;曹淑敏;鄔賀銓;;5G移動通信發(fā)展趨勢與若干關(guān)鍵技術(shù)[J];中國科學(xué):信息科學(xué);2014年05期

2 秦婷;;通信基站能耗分析[J];西安郵電學(xué)院學(xué)報(bào);2011年02期

，

本文編號：2055674