本文選題：低時延 + 高可靠　； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：隨著下一代移動通信系統(tǒng)的演進和移動互聯(lián)網(wǎng)時代的到來,5G技術(shù)應(yīng)運而生。5G系統(tǒng)不僅在可靠性、時延以及容量等特性上提出了新的需求,還必須滿足一些特定的場景�！暗蜁r延高可靠場景”為5G的四大應(yīng)用場景之一。其中,交通效率與安全是低時延高可靠技術(shù)場景的重要應(yīng)用。在該應(yīng)用場景中,車輛間通過信息交互來保證協(xié)同駕駛,數(shù)據(jù)傳輸中低時延和高可靠性能有效避免事故的發(fā)生。本文的研究目標是建立低時延高可靠系統(tǒng)仿真平臺,來進行各項關(guān)鍵技術(shù)的仿真與驗證。本文的內(nèi)容主要為通過搭建車輛對基礎(chǔ)設(shè)施(Vehicle-to-infrastructure,V2I)場景來進行低時延、高可靠性場景技術(shù)方案研究與驗證。本文將以車聯(lián)網(wǎng)通信為基礎(chǔ),結(jié)合虛擬建模和場景仿真技術(shù),深入研究基于V2I通信系統(tǒng)的低時延高可靠仿真平臺的設(shè)計及實現(xiàn)方案,并給出時延與可靠性的仿真結(jié)果及其分析。主要研究內(nèi)容有:(1)研究低時延與高可靠性相關(guān)技術(shù)原理,驗證混合自動重傳請求(Hybrid Automatic Repeat Request,HARQ)機制和正交頻分多址接入技術(shù)(Orthogonal Frequency Division Multiple Access,OFDMA)對時延和可靠性的影響。(2)研究車聯(lián)網(wǎng)通信仿真技術(shù),從車聯(lián)網(wǎng)通信的應(yīng)用特點和場景著手,介紹有關(guān)的場景建模技術(shù)。對仿真平臺中車輛模型的路徑算法和車輛跟馳模型進行理論分析,為車輛模型的搭建提供理論基礎(chǔ)。(3)通過設(shè)計與實現(xiàn)場景布局、信道模型模塊、車載行為模塊和主控程序模塊來建立低時延高可靠仿真平臺。基于不同業(yè)務(wù)的應(yīng)用,對低時延高可靠仿真平臺進行了仿真驗證,并分析了不同業(yè)務(wù)在車載通信中的性能。(4)仿真平臺驗證了OFDMA讓信干噪比(Signal to Interference plus Noise Ratio,SINR)提高了約25dB,HARQ技術(shù)讓數(shù)據(jù)包的成功率提高到了98.8%,E2E時延降低到7.5ms。較小的發(fā)射時間間隔(Transmission Time Interval,TTI)將98.8%的數(shù)據(jù)包的E2E時延降低到5ms以內(nèi)。
[Abstract]:With the evolution of the next generation mobile communication system and the arrival of the mobile Internet era, 5G technology emerges as the times require. 5G system not only puts forward new requirements in reliability, delay and capacity, but also has to meet some specific scenarios. "low delay and high reliability scenario" is one of the four application scenarios of 5G. Among them, traffic efficiency and safety are important applications of low delay and high reliability technology scenarios. In this application scenario, the vehicles can communicate with each other to ensure cooperative driving, and the data transmission with low delay and high reliability can effectively avoid accidents. The purpose of this paper is to establish a system simulation platform with low delay and high reliability to simulate and verify the key technologies. The main content of this paper is to study and verify the technology scheme of low delay and high reliability scenarios by setting up vehicle-to-infrastructure V2I scene. In this paper, the design and implementation of a high reliability simulation platform based on V2I communication system with low delay and high reliability is studied, based on the virtual modeling and scene simulation technology. The simulation results and analysis of delay and reliability are given. The main contents of this study are as follows: (1) to study the technical principles related to low delay and high reliability. Verify the effect of hybrid Automatic repeat request HARQ mechanism and orthogonal Frequency Division multiple access (OFDMA) on delay and reliability. This paper introduces the technology of scene modeling. This paper analyzes the path algorithm of vehicle model and car-following model in the simulation platform, which provides the theoretical basis for the vehicle model building. It designs and implements the scene layout and channel model module. The vehicle behavior module and the main control program module are used to establish a high reliability simulation platform with low delay. Based on the application of different services, the simulation of low delay and high reliability simulation platform is carried out. The performance of different services in vehicle-borne communication is analyzed. The simulation platform verifies that OFDMA can improve the signal-to-noise ratio (signal-to-interference plus noise ratio) about 25dB HARQ and reduce the delay of E2E to 7.5ms7.5ms. Transmission time Intervalator TTI (TTI) reduces the E2E delay of 98.8% packets to less than 5ms.
【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;TP391.9;U495

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本文編號：2016964