本文選題：異構(gòu)網(wǎng)　切入點(diǎn)：泊松點(diǎn)過程　出處：《北京交通大學(xué)》2017年碩士論文

【摘要】：隨著無線通信的飛速發(fā)展,傳統(tǒng)的蜂窩網(wǎng)絡(luò)已經(jīng)無法滿足急劇增長的移動用戶數(shù)和大數(shù)據(jù)量的業(yè)務(wù)需求,多元化、密集化的異構(gòu)網(wǎng)絡(luò)成為當(dāng)前網(wǎng)絡(luò)發(fā)展的主要方向。在異構(gòu)網(wǎng)絡(luò)中,干擾問題成為限制網(wǎng)絡(luò)性能提升的主要瓶頸之一,而基站的分布又對干擾問題的研究起著至關(guān)重要的作用。傳統(tǒng)的網(wǎng)格狀網(wǎng)絡(luò)模型過于理想,不能反映出異構(gòu)網(wǎng)絡(luò)基站分布的特點(diǎn),并且需要進(jìn)行大規(guī)模的系統(tǒng)級仿真才能得到網(wǎng)絡(luò)性能結(jié)果。而泊松點(diǎn)過程能夠反映網(wǎng)絡(luò)中節(jié)點(diǎn)分布的隨機(jī)性,其良好的數(shù)學(xué)統(tǒng)計特性也為網(wǎng)絡(luò)性能的分析提供了便利。所以,本文使用泊松點(diǎn)過程對異構(gòu)網(wǎng)絡(luò)建模,并通過泊松點(diǎn)過程的相關(guān)性質(zhì)和數(shù)學(xué)統(tǒng)計方法得出能夠反映網(wǎng)絡(luò)性能的表達(dá)式,避免了復(fù)雜的系統(tǒng)級仿真,為網(wǎng)絡(luò)性能分析提供了一種簡便易行的方案。本文的主要研究工作包括:(1)針對蜂窩網(wǎng)絡(luò)下D2D通信場景,建立網(wǎng)絡(luò)模型,并推導(dǎo)覆蓋率表達(dá)式和用戶接入概率分布函數(shù);(2)在蜂窩網(wǎng)絡(luò)下的D2D通信場景基礎(chǔ)上,對干擾消除技術(shù)進(jìn)行分析和建模,推導(dǎo)出干擾消除技術(shù)的覆蓋率表達(dá)式和用戶接入概率分布函數(shù),并通過仿真分析干擾消除技術(shù)對系統(tǒng)性能的影響;(3)建立了異構(gòu)網(wǎng)絡(luò)場景下增強(qiáng)型小區(qū)干擾協(xié)調(diào)技術(shù)的網(wǎng)絡(luò)模型,推導(dǎo)了網(wǎng)絡(luò)頻譜效率分布函數(shù);(4)在異構(gòu)網(wǎng)絡(luò)場景下提出一種增強(qiáng)型小區(qū)干擾協(xié)調(diào)技術(shù)的雙連接動態(tài)調(diào)度方法,并通過仿真對這種方案進(jìn)行分析,證明了這一方案能夠增加邊緣用戶的傳輸機(jī)會,保障了網(wǎng)絡(luò)平均頻譜效率,且更適用于幾乎空白子幀比例較低的場景和更強(qiáng)調(diào)負(fù)載均衡的場景。本文通過建立不同場景和不同干擾管理方案的網(wǎng)絡(luò)模型,推導(dǎo)得到能夠反映網(wǎng)絡(luò)性能的覆蓋率、用戶接入概率分布函數(shù)、頻譜效率分布函數(shù)等表達(dá)式,為分析網(wǎng)絡(luò)性能提供了一種簡便有效的方法,降低了大規(guī)模的系統(tǒng)級仿真的時間和成本代價。
[Abstract]:With the rapid development of wireless communication, the traditional cellular network has been unable to meet the rapid increase in the number of mobile users and large amount of data business requirements, diversification, dense heterogeneous networks become the main direction of the current network development.In heterogeneous networks, interference problem has become one of the main bottlenecks to limit the performance of the network, and the distribution of base stations plays an important role in the study of interference problems.The traditional grid-like network model is too ideal to reflect the characteristics of base station distribution in heterogeneous networks, and large-scale system-level simulation is needed to get the network performance results.Poisson point process can reflect the randomness of node distribution in the network, and its good mathematical and statistical properties also provide convenience for the analysis of network performance.Therefore, this paper uses Poisson point process to model the heterogeneous network, and through the relevant properties of Poisson point process and mathematical statistics method to obtain the expression that can reflect the network performance, avoiding the complex system level simulation.It provides a simple scheme for network performance analysis.The main research work of this paper includes: (1) establishing a network model for D2D communication scenarios in cellular networks, and deducing the coverage expression and user access probability distribution function / 2) on the basis of D2D communication scenarios in cellular networks.The interference cancellation technology is analyzed and modeled, and the coverage expression and user access probability distribution function of interference cancellation technology are derived.The influence of interference cancellation technology on system performance is analyzed by simulation. (3) the network model of enhanced cell interference coordination technology in heterogeneous network scenario is established.In this paper, the spectrum efficiency distribution function of the network is derived. In the heterogeneous network scenario, an enhanced cell interference coordination dynamic scheduling method is proposed, and the scheme is analyzed by simulation.It is proved that the proposed scheme can increase the transmission opportunities of edge users, ensure the average spectral efficiency of the network, and be more suitable for scenarios with low ratio of almost blank subframes and more emphasis on load balancing.In this paper, the network models of different scenarios and different interference management schemes are established, and the network coverage, user access probability distribution function, spectrum efficiency distribution function and so on are derived.It provides a simple and effective method for analyzing network performance and reduces the time and cost of large-scale system-level simulation.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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